What are the cheapest airlines to fly from St. Louis to Region of Ontario one-way?

For one-way options, check prices for American Airlines. According to our data, you can fly for as low as C$ 391. Users have also found prices from C$ 524 and C$ 615 on WestJet and United Airlines, respectively.

What are the most popular routes from St. Louis to Region of Ontario?

The most popular flight routes from St. Louis to Region of Ontario are Lambert-St Louis - Toronto Pearson Intl, Lambert-St Louis - Montreal Pierre Elliott Trudeau Intl and Lambert-St Louis - London.

What are the cheapest flights from St. Louis to Region of Ontario?

The cheapest flight price from St. Louis to Region of Ontario is C$ 361. On average you can expect to pay C$ 838. The most popular route, (Lambert-St Louis - Toronto Pearson Intl), can usually be booked for C$ 455.

What are the most reliable airlines from St. Louis to Region of Ontario?

Before booking your flight to Region of Ontario from St. Louis, check out the most reliable airlines to get you to your destination on time: Air Canada (90%), Jazz (90%), United Airlines( 90%).

How far in advance should I book a flight from St. Louis to Region of Ontario?

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 24 days in advance, which can save you up to 128% on flights from St. Louis to Region of Ontario compared to booking the week you need them. Waiting 24 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at C$ 367. For sooner than that we have options available in the next 3 days from C$ 662.

What is the cheapest month to fly from St. Louis to Region of Ontario?

March is one of the best times of the year to fly to Region of Ontario from St. Louis. Prices for March average C$ 522 per person but you can even find prices for as low as C$ 246. The most expensive prices can be found in the month of February. Opting for a March flight can save you 96% on your journey compared to booking in February

What airport do you fly from for flights from St. Louis to Ontario?

If you book a flight to Ontario from St. Louis, you will be flying from Lambert-St Louis, which is the city’s only airport. Lambert-St Louis (STL) is located 20.4 km from the centre of St. Louis.

Can I find deals for flights from St. Louis to Ontario that include hotel bookings?

Yes. In addition to deals on St. Louis to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from St. Louis to Ontario?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Ontario.

Can I find deals for business class flights from St. Louis to Ontario?

Yes. Cheapflights offers flight deals from St. Louis to Ontario by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

C$ 169+ Flights from St. Louis, Missouri to Ontario

Cheap flight deals from St. Louis to Ontario

Find flight deals from St. Louis to Ontario

Cheapest flights from St. Louis to Ontario
Explore the most affordable flight options available from St. Louis to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 20 November 2024.

Tue 3/125:02 p.m.STL - YYZ

1 stop20h 22mMultiple Airlines

Wed 4/128:00 p.m.YYZ - STL

2 stops20h 21mMultiple Airlines

Deal found 20/11C$ 441

Mon 9/127:15 p.m.STL - YYZ

2 stops26h 58mWestJet

Wed 11/126:15 a.m.YYZ - STL

1 stop28h 07mWestJet

Deal found 20/11C$ 612

Wed 18/125:45 a.m.STL - YYZ

1 stop10h 50mAmerican Airlines

Wed 25/126:15 a.m.YYZ - STL

1 stop10h 25mAmerican Airlines

Deal found 18/11C$ 713

Wed 27/116:32 p.m.STL - YUL

1 stop19h 08mMultiple Airlines

Wed 4/123:55 p.m.YUL - STL

1 stop24h 26mMultiple Airlines

Deal found 19/11C$ 724

Wed 18/1211:20 a.m.STL - YYZ

1 stop9h 05mUnited Airlines

Wed 25/128:00 a.m.YYZ - STL

1 stop12h 57mUnited Airlines

Deal found 20/11C$ 748

Sat 7/125:30 p.m.STL - YYZ

1 stop4h 06mDelta

Wed 11/126:30 a.m.YYZ - STL

1 stop9h 30mDelta

Deal found 19/11C$ 846

Fri 13/125:40 p.m.STL - YYZ

1 stop5h 19mAir Canada

Tue 14/11:50 p.m.YYZ - STL

Nonstop2h 16mAir Canada

Deal found 19/11C$ 878

Sat 7/127:17 a.m.STL - YUL

1 stop14h 19mAmerican Airlines

Thu 12/1210:59 a.m.YUL - STL

2 stops12h 14mAmerican Airlines

Deal found 19/11C$ 907

Sun 8/1210:28 a.m.STL - YUL

1 stop5h 31mDelta

Tue 10/126:05 a.m.YUL - STL

1 stop9h 55mDelta

Deal found 19/11C$ 910

Tue 17/128:25 a.m.STL - YUL

1 stop10h 23mUnited Airlines

Tue 24/126:10 p.m.YUL - STL

2 stops22h 37mUnited Airlines

Deal found 19/11C$ 952

Tue 17/128:05 a.m.STL - YUL

1 stop8h 14mAir Canada

Tue 24/129:15 a.m.YUL - STL

1 stop6h 51mAir Canada

Deal found 19/11C$ 1,039

Tue 17/128:30 a.m.STL - YXU

2 stops23h 45mUnited Airlines

Thu 19/129:55 a.m.YXU - STL

1 stop6h 11mUnited Airlines

Deal found 20/11C$ 1,168

Best flights from St. Louis to Ontario
Discover carefully curated flight deals from St. Louis to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 20 November 2024.

Tue 3/125:02 p.m.STL - YYZ

1 stop20h 22mMultiple Airlines

Wed 4/128:00 p.m.YYZ - STL

2 stops20h 21mMultiple Airlines

Deal found 20/11C$ 441

Mon 9/127:15 p.m.STL - YYZ

2 stops26h 58mWestJet

Wed 11/126:15 a.m.YYZ - STL

1 stop28h 07mWestJet

Deal found 20/11C$ 612

Wed 18/125:45 a.m.STL - YYZ

1 stop10h 50mAmerican Airlines

Wed 25/126:15 a.m.YYZ - STL

1 stop10h 25mAmerican Airlines

Deal found 20/11C$ 734

Wed 18/1211:20 a.m.STL - YYZ

1 stop9h 05mUnited Airlines

Wed 25/128:00 a.m.YYZ - STL

1 stop12h 57mUnited Airlines

Deal found 20/11C$ 748

Wed 8/110:20 a.m.STL - YYZ

1 stop9h 11mDelta

Sat 11/16:15 a.m.YYZ - STL

2 stops11h 38mDelta

Deal found 20/11C$ 798

Fri 13/125:40 p.m.STL - YYZ

1 stop4h 26mAir Canada

Tue 14/11:50 p.m.YYZ - STL

Nonstop2h 16mAir Canada

Deal found 20/11C$ 878

Mon 13/12:49 p.m.STL - YYZ

1 stop23h 16mAlaska Airlines

Fri 24/14:20 p.m.YYZ - STL

2 stops27h 03mAlaska Airlines

Deal found 20/11C$ 934

Sun 12/13:48 p.m.STL - YUL

3 stops23h 57mMultiple Airlines

Wed 15/12:35 p.m.YUL - STL

3 stops25h 08mMultiple Airlines

Deal found 20/11C$ 682

Sun 12/110:20 a.m.STL - YUL

1 stop5h 02mDelta

Wed 15/111:20 a.m.YUL - STL

1 stop10h 46mDelta

Deal found 20/11C$ 857

Sun 12/15:23 a.m.STL - YUL

2 stops10h 27mAmerican Airlines

Wed 15/110:54 a.m.YUL - STL

2 stops12h 14mAmerican Airlines

Deal found 20/11C$ 885

Fri 25/45:40 p.m.STL - YUL

1 stop5h 03mWestJet

Mon 28/49:30 a.m.YUL - STL

1 stop4h 49mWestJet

Deal found 19/11C$ 1,026

Sat 4/17:00 a.m.STL - YUL

1 stop7h 58mUnited Airlines

Sat 11/110:30 a.m.YUL - STL

2 stops12h 15mUnited Airlines

Deal found 19/11C$ 1,044

Direct flights from St. Louis to Ontario
Explore direct flight options from St. Louis to Ontario based on user searches, and compare prices and availability for your desired travel dates. Data last updated 20 November 2024.

Wed 8/13:50 p.m.STL - YYZ

Nonstop1h 55mAir Canada

Wed 22/11:50 p.m.YYZ - STL

Nonstop2h 16mAir Canada

Deal found 19/11C$ 892

Sat 4/13:50 p.m.STL - YYZ

Nonstop1h 55mUnited Airlines

Sat 11/11:50 p.m.YYZ - STL

Nonstop2h 16mUnited Airlines

Deal found 19/11C$ 1,109

Last-minute flights from St. Louis to Ontario
Discover last-minute flight deals from St. Louis to Ontario. Data last updated 20 November 2024 and is based on user searches.

Tue 26/117:30 a.m.STL - YYZ

1 stop7h 30mAmerican Airlines

Sat 30/114:44 p.m.YYZ - STL

1 stop4h 48mAmerican Airlines

Deal found 20/11C$ 1,149

Tue 26/118:25 a.m.STL - YYZ

2 stops7h 54mUnited Airlines

Sat 30/1111:00 a.m.YYZ - STL

1 stop4h 25mUnited Airlines

Deal found 20/11C$ 1,344

Tue 26/113:50 p.m.STL - YYZ

Nonstop1h 55mAir Canada

Sat 30/116:52 a.m.YYZ - STL

1 stop6h 27mAir Canada

Deal found 20/11C$ 1,380

Tue 26/116:30 a.m.STL - YYZ

2 stops8h 41mDelta

Sun 1/126:00 a.m.YYZ - STL

1 stop4h 36mDelta

Deal found 20/11C$ 1,410

Wed 27/116:32 p.m.STL - YUL

1 stop19h 08mMultiple Airlines

Wed 4/123:55 p.m.YUL - STL

1 stop24h 26mMultiple Airlines

Deal found 19/11C$ 724

Wed 27/1112:45 p.m.STL - YUL

2 stops10h 55mDelta

Wed 4/126:05 a.m.YUL - STL

2 stops12h 10mDelta

Deal found 19/11C$ 1,232

Fri 29/116:30 a.m.STL - YUL

2 stops14h 34mUnited Airlines

Sun 1/126:00 a.m.YUL - STL

1 stop10h 39mUnited Airlines

Deal found 20/11C$ 1,351

Fri 29/111:09 p.m.STL - YUL

2 stops34h 31mWestJet

Sun 1/126:45 a.m.YUL - STL

2 stops34h 44mWestJet

Deal found 19/11C$ 1,715

Tue 3/125:02 p.m.STL - YYZ

1 stop20h 22mMultiple Airlines

Wed 4/128:00 p.m.YYZ - STL

2 stops20h 21mMultiple Airlines

Deal found 20/11C$ 441

Sat 7/125:30 p.m.STL - YYZ

1 stop4h 06mDelta

Wed 11/126:30 a.m.YYZ - STL

1 stop9h 30mDelta

Deal found 19/11C$ 846

Sat 7/127:17 a.m.STL - YUL

1 stop14h 19mAmerican Airlines

Thu 12/1210:59 a.m.YUL - STL

2 stops12h 14mAmerican Airlines

Deal found 19/11C$ 907

Sun 8/1210:28 a.m.STL - YUL

1 stop5h 31mDelta

Tue 10/126:05 a.m.YUL - STL

1 stop9h 55mDelta

Deal found 19/11C$ 910

One-way flights from St. Louis to Ontario
Search for one-way flight options from St. Louis to Ontario. Find affordable one-way fares based on user searches. Data last updated 20 November 2024.

Wed 11/125:02 p.m.STL - YYZ

1 stop15h 52mMultiple Airlines

Deal found 20/11C$ 169

Mon 2/126:32 p.m.STL - YUL

2 stops53h 08mMultiple Airlines

Deal found 20/11C$ 322

Sat 4/16:15 a.m.STL - YYZ

1 stop9h 20mAmerican Airlines

Deal found 20/11C$ 391

Sat 7/1210:28 a.m.STL - YYZ

1 stop5h 32mWestJet

Deal found 20/11C$ 524

Sat 4/13:50 p.m.STL - YYZ

Nonstop1h 55mUnited Airlines

Deal found 20/11C$ 615

Wed 27/113:50 p.m.STL - YYZ

Nonstop1h 55mAir Canada

Deal found 20/11C$ 736

Sat 4/111:30 a.m.STL - YXU

2 stops7h 50mUnited Airlines

Deal found 20/11C$ 750

Find flights from St. Louis to Ontario within your budget

Fly from

Fly to

Route

Depart

Return

Price

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Tue 3/12

5:02 p.m.-2:24 p.m.

1 stop20h 22m

Toronto Pearson Intl

Wed 4/12

8:00 p.m.-3:21 p.m.

2 stops20h 21m

C$ 441

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Mon 9/12

7:15 p.m.-11:13 p.m.

2 stops26h 58m

Toronto Pearson Intl

Wed 11/12

6:15 a.m.-9:22 a.m.

1 stop28h 07m

C$ 612

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Sun 12/1

3:48 p.m.-4:45 p.m.

3 stops23h 57m

Montreal Pierre Elliott Trudeau Intl

Wed 15/1

2:35 p.m.-2:43 p.m.

3 stops25h 08m

C$ 682

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Wed 18/12

5:45 a.m.-5:35 p.m.

1 stop10h 50m

Toronto Pearson Intl

Wed 25/12

6:15 a.m.-3:40 p.m.

1 stop10h 25m

C$ 734

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Wed 18/12

11:20 a.m.-9:25 p.m.

1 stop9h 05m

Toronto Pearson Intl

Wed 25/12

8:00 a.m.-7:57 p.m.

1 stop12h 57m

C$ 748

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Wed 8/1

10:20 a.m.-8:31 p.m.

1 stop9h 11m

Toronto Pearson Intl

Sat 11/1

6:15 a.m.-4:53 p.m.

2 stops11h 38m

C$ 798

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Sun 12/1

10:20 a.m.-4:22 p.m.

1 stop5h 02m

Montreal Pierre Elliott Trudeau Intl

Wed 15/1

11:20 a.m.-9:06 p.m.

1 stop10h 46m

C$ 857

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Fri 13/12

5:40 p.m.-11:06 p.m.

1 stop4h 26m

Toronto Pearson Intl

Tue 14/1

1:50 p.m.-3:06 p.m.

Nonstop2h 16m

C$ 878

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Sun 12/1

5:23 a.m.-4:50 p.m.

2 stops10h 27m

Montreal Pierre Elliott Trudeau Intl

Wed 15/1

10:54 a.m.-10:08 p.m.

2 stops12h 14m

C$ 885

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Mon 13/1

2:49 p.m.-3:05 p.m.

1 stop23h 16m

Toronto Pearson Intl

Fri 24/1

4:20 p.m.-6:23 p.m.

2 stops27h 03m

C$ 934

Flights are sorted by cheapest round-trip flights first.

Deals found on 20/11

Showing 1-10 of 21 results

Best time to book a flight from St. Louis to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from St. Louis with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Travel insights for flights from St. Louis to Ontario

Get recent, data-driven insights about flights from St. Louis to Ontario including ideal travel times, pricing trends, and more.

What is the cheapest month to book a flight from St. Louis to Region of Ontario?

Currently, October is the cheapest month in which you can book a flight from St. Louis to Region of Ontario (average of C$ 178). Flying from St. Louis to Region of Ontario in July is currently the most expensive (average of C$ 258). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from STL to ON?

When flying from St. Louis to Region of Ontario, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from St. Louis to Region of Ontario

The most flights from STL to CAON are scheduled on a Monday (2 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (2 on average).

Rainfall in Ontario by month

In terms of precipitation, rainfall in Region of Ontario ranges from 51.0 - 83.0 mm per month. June is typically the wettest month, when rainfall can reach 83.0 mm. February is typically the driest time to visit Region of Ontario when rainfall is around 51.0 mm.

Temperature in Ontario by month

If weather is an important factor for your trip to Region of Ontario, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 21.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -6.0 C).

Reviews of airlines servicing Ontario

Read through reviews of airlines operating flights from St. Louis to Ontario, such as WestJet, American Airlines and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Alaska Airlines

8.0

Very good

9,461 reviews

Check prices

Reviews

1 / 10

Service was good. We pre-ordered a snack but never made it to us.

Alaska Airlines

8.0

Very good

9,461 reviews

Alaska Airlines

8.0

Very good

9,461 reviews

Check prices

Reviews

1 / 10

Service was good. We pre-ordered a snack but never made it to us.

Delta

8.0

Very good

8,756 reviews

Alaska Airlines

8.0

Very good

9,461 reviews

Check prices

Reviews

1 / 10

Service was good. We pre-ordered a snack but never made it to us.

United Airlines

7.4

Good

9,171 reviews

Alaska Airlines

8.0

Very good

9,461 reviews

Check prices

Reviews

1 / 10

Service was good. We pre-ordered a snack but never made it to us.

WestJet

7.3

Good

2,811 reviews

Alaska Airlines

8.0

Very good

9,461 reviews

Check prices

Reviews

1 / 10

Service was good. We pre-ordered a snack but never made it to us.

American Airlines

7.2

Good

10,000 reviews

Alaska Airlines

8.0

Very good

9,461 reviews

Check prices

Reviews

1 / 10

Service was good. We pre-ordered a snack but never made it to us.

Related info for your journey

What airport do you fly from for flights from St. Louis to Ontario?
If you book a flight to Ontario from St. Louis, you will be flying from Lambert-St Louis, which is the city’s only airport. Lambert-St Louis (STL) is located 20.4 km from the centre of St. Louis.
What are the cheapest airlines to fly from St. Louis to Region of Ontario one-way?
For one-way options, check prices for American Airlines. According to our data, you can fly for as low as C$ 391. Users have also found prices from C$ 524 and C$ 615 on WestJet and United Airlines, respectively.
What are the most popular routes from St. Louis to Region of Ontario?
The most popular flight routes from St. Louis to Region of Ontario are Lambert-St Louis - Toronto Pearson Intl, Lambert-St Louis - Montreal Pierre Elliott Trudeau Intl and Lambert-St Louis - London.
What are the most reliable airlines from St. Louis to Region of Ontario?
Before booking your flight to Region of Ontario from St. Louis, check out the most reliable airlines to get you to your destination on time: Air Canada (90%), Jazz (90%), United Airlines( 90%).
What are the cheapest flights from St. Louis to Region of Ontario?
The cheapest flight price from St. Louis to Region of Ontario is C$ 361. On average you can expect to pay C$ 838. The most popular route, (Lambert-St Louis - Toronto Pearson Intl), can usually be booked for C$ 455.
Can I find deals for flights from St. Louis to Ontario that include hotel bookings?
Yes. In addition to deals on St. Louis to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from St. Louis to Ontario?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Ontario.
Can I find deals for business class flights from St. Louis to Ontario?
Yes. Cheapflights offers flight deals from St. Louis to Ontario by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from St. Louis to Region of Ontario?
Currently, October is the cheapest month in which you can book a flight from St. Louis to Region of Ontario (average of C$ 178). Flying from St. Louis to Region of Ontario in July is currently the most expensive (average of C$ 258). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for St. Louis to Ontario

Complete your trip

Region of Ontario car rentals

Toronto Pearson Intl Airport car rentals

Ottawa Airport car rentals

Toronto Island Airport car rentals

London Airport car rentals

Hamilton Airport car rentals

Toronto Region of Waterloo Intl Airport car rentals

Thunder Bay Airport car rentals

Sault Ste Marie Airport car rentals

Kingston Airport car rentals

Timmins Airport car rentals

North Bay Airport car rentals

Direct flights to Canada

Top airline flying from St. Louis to Ontario

Airline	Cheapest	Average	Flexibility	On-time
Air Canada	CheapestC$ 361	AverageC$ 781	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights

Fly with Cheapflights

How does Cheapflights help users find flights from St. Louis to Ontario?

Cheapflights helps you search for flights from St. Louis to Ontario via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from St. Louis to Ontario?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Ontario from St. Louis.

Can Cheapflights find flights from St. Louis to Ontario with no change fees?

Certainly. Search results for flights to Ontario from St. Louis shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from St. Louis to Ontario become cheaper?

Yes! Start tracking prices for St. Louis to Ontario flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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Cheap flights from St. Louis to Ontario from C$ 169

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/12. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from St. Louis to Ontario

Find flight deals from St. Louis to Ontario

Cheapest flights from St. Louis to OntarioExplore the most affordable flight options available from St. Louis to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 20 November 2024.

Explore the most affordable flight options available from St. Louis to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 20 November 2024.

Find flights from St. Louis to Ontario within your budget

Best time to book a flight from St. Louis to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from St. Louis with our price prediction graph.

Travel insights for flights from St. Louis to Ontario

Get recent, data-driven insights about flights from St. Louis to Ontario including ideal travel times, pricing trends, and more.

What is the cheapest month to book a flight from St. Louis to Region of Ontario?

What is the cheapest time of day to fly from STL to ON?

Find hourly flight availability from St. Louis to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 20 November 2024.

Weekly flight availability from St. Louis to Region of Ontario

Explore weekly flight availability from St. Louis to Ontario. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 20 November 2024.

Rainfall in Ontario by month

Plan your trip to Ontario by taking into account the average rainfall totals by month.

Temperature in Ontario by month

Plan your trip to Ontario by taking into account the average temperature totals by month.

Reviews of airlines servicing Ontario

Read through reviews of airlines operating flights from St. Louis to Ontario, such as WestJet, American Airlines and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airport do you fly from for flights from St. Louis to Ontario?

What are the cheapest airlines to fly from St. Louis to Region of Ontario one-way?

What are the most popular routes from St. Louis to Region of Ontario?

What are the most reliable airlines from St. Louis to Region of Ontario?

What are the cheapest flights from St. Louis to Region of Ontario?

Can I find deals for flights from St. Louis to Ontario that include hotel bookings?

How can I find direct flights from St. Louis to Ontario?

Can I find deals for business class flights from St. Louis to Ontario?

What is the cheapest month to book a flight from St. Louis to Region of Ontario?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for St. Louis to Ontario

See prices for flight routes from nearby airports that may be better suited for you.

Top airline flying from St. Louis to Ontario

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from St. Louis to Ontario?

Why should you use Cheapflights to find cheap flight tickets from St. Louis to Ontario?

Can Cheapflights find flights from St. Louis to Ontario with no change fees?

Can Cheapflights notify me if prices for flights from St. Louis to Ontario become cheaper?

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Cheapest flights from St. Louis to Ontario
Explore the most affordable flight options available from St. Louis to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 20 November 2024.