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$ 321. On average you can expect to pay C$ 363. The most popular route, (Lambert-St Louis - Toronto Pearson Intl), can usually be booked for C$ 476.

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 51 days in advance, which can save you up to 140% on flights from St. Louis to Region of Ontario compared to booking the week you need them. Waiting 51 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$ 461. For sooner than that we have options available in the next 3 days from C$ 680.

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$ 559 per person but you can even find prices for as low as C$ 253. The most expensive prices can be found in the month of February. Opting for a March flight can save you 88% 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$ 262+ Flights from St. Louis to Ontario

Cheap flight deals from St. Louis to Ontario

Round-trip from	C$ 507
One-way from	C$ 262

15/1-21/1
4 total stops
43h 16m total
St. Louis to Ontario

Search Deals

6/1
2 total stops
18h 06m total
St. Louis to Ontario

Search Deals

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 22 December 2024.

Sat 21/123:53 p.m.STL - YYZ

1 stop26h 37mMultiple Airlines

Wed 1/12:55 p.m.YYZ - STL

1 stop25h 26mMultiple Airlines

Deal found 21/12C$ 823

Wed 25/127:30 a.m.STL - YYZ

2 stops10h 30mAmerican Airlines

Fri 27/121:49 p.m.YYZ - STL

1 stop10h 11mAmerican Airlines

Deal found 21/12C$ 1,319

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

2 stops9h 40mAmerican Airlines

Sun 5/15:30 p.m.YUL - STL

1 stop18h 39mAmerican Airlines

Deal found 21/12C$ 1,354

Sun 29/128:00 a.m.STL - YYZ

1 stop6h 45mUnited Airlines

Wed 1/11:50 p.m.YYZ - STL

Nonstop2h 16mUnited Airlines

Deal found 21/12C$ 1,425

Mon 23/127:15 a.m.STL - YYZ

2 stops8h 57mDelta

Thu 2/15:15 p.m.YYZ - STL

1 stop5h 20mDelta

Deal found 21/12C$ 1,533

Sun 29/1211:46 a.m.STL - YYZ

2 stops17h 33mWestJet

Wed 1/16:30 a.m.YYZ - STL

1 stop16h 36mWestJet

Deal found 21/12C$ 1,560

Mon 23/123:50 p.m.STL - YYZ

Nonstop1h 55mAir Canada

Thu 2/11:50 p.m.YYZ - STL

Nonstop2h 16mAir Canada

Deal found 21/12C$ 1,828

Mon 23/1211:36 a.m.STL - YYZ

2 stops26h 31mAlaska Airlines

Thu 2/16:10 a.m.YYZ - STL

2 stops18h 49mAlaska Airlines

Deal found 21/12C$ 2,599

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 22 December 2024.

Wed 15/112:15 p.m.STL - YYZ

3 stops34h 38mMultiple Airlines

Tue 21/17:05 a.m.YYZ - STL

1 stop8h 38mMultiple Airlines

Deal found 21/12C$ 507

Sat 25/18:50 a.m.STL - YUL

1 stop24h 39mDelta

Mon 27/16:00 a.m.YUL - STL

1 stop27h 58mDelta

Deal found 21/12C$ 658

Wed 8/112:00 p.m.STL - YYZ

1 stop8h 20mAmerican Airlines

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

1 stop8h 52mAmerican Airlines

Deal found 21/12C$ 741

Sat 25/15:50 p.m.STL - YUL

2 stops15h 20mPorter Airlines

Mon 27/14:00 p.m.YUL - STL

2 stops17h 58mPorter Airlines

Deal found 21/12C$ 744

Thu 6/37:00 a.m.STL - YYZ

1 stop30h 55mAlaska Airlines

Sun 16/34:10 p.m.YYZ - STL

1 stop32h 49mAlaska Airlines

Deal found 21/12C$ 769

Wed 8/16:30 a.m.STL - YYZ

2 stops14h 45mUnited Airlines

Sat 11/16:52 a.m.YYZ - STL

1 stop9h 46mUnited Airlines

Deal found 21/12C$ 855

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

Nonstop1h 55mAir Canada

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

Nonstop2h 16mAir Canada

Deal found 21/12C$ 954

Fri 18/46:00 a.m.STL - YYZ

2 stops23h 17mWestJet

Sun 20/46:00 a.m.YYZ - STL

1 stop6h 45mWestJet

Deal found 21/12C$ 1,096

Tue 11/37:27 p.m.STL - YUL

2 stops20h 18mMultiple Airlines

Sat 15/36:50 a.m.YUL - STL

3 stops29h 55mMultiple Airlines

Deal found 21/12C$ 638

Wed 8/16:05 a.m.STL - YYZ

1 stop9h 06mDelta

Wed 22/15:05 p.m.YYZ - STL

1 stop16h 53mDelta

Deal found 21/12C$ 665

Fri 7/25:03 p.m.STL - YUL

1 stop16h 07mAmerican Airlines

Sun 9/210:55 a.m.YUL - STL

1 stop10h 05mAmerican Airlines

Deal found 21/12C$ 777

Wed 18/61:30 p.m.STL - YUL

Nonstop2h 30mUnited Airlines

Mon 23/66:10 p.m.YUL - STL

Nonstop2h 50mUnited Airlines

Deal found 21/12C$ 1,088

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 22 December 2024.

Thu 6/33:50 p.m.STL - YYZ

Nonstop1h 55mUnited Airlines

Sun 16/31:50 p.m.YYZ - STL

Nonstop2h 16mUnited Airlines

Deal found 21/12C$ 887

Thu 6/33:50 p.m.STL - YYZ

Nonstop1h 55mAir Canada

Sun 16/31:50 p.m.YYZ - STL

Nonstop2h 16mAir Canada

Deal found 21/12C$ 888

Tue 7/13:50 p.m.STL - YYZ

Nonstop1h 55mMultiple Airlines

Fri 10/11:50 p.m.YYZ - STL

Nonstop2h 16mMultiple Airlines

Deal found 21/12C$ 1,039

Wed 18/61:30 p.m.STL - YUL

Nonstop2h 30mUnited Airlines

Mon 23/66:10 p.m.YUL - STL

Nonstop2h 50mUnited Airlines

Deal found 21/12C$ 1,088

Tue 3/61:30 p.m.STL - YUL

Nonstop2h 30mAir Canada

Wed 18/66:10 p.m.YUL - STL

Nonstop2h 50mAir Canada

Deal found 21/12C$ 1,487

Last-minute flights from St. Louis to Ontario
Discover last-minute flight deals from St. Louis to Ontario. Data last updated 22 December 2024 and is based on user searches.

Mon 23/1211:36 a.m.STL - YYZ

2 stops26h 31mAlaska Airlines

Thu 2/16:10 a.m.YYZ - STL

2 stops18h 49mAlaska Airlines

Deal found 21/12C$ 2,599

Fri 27/125:17 p.m.STL - YYZ

1 stop5h 36mDelta

Sun 29/127:15 a.m.YYZ - STL

1 stop5h 47mDelta

Deal found 21/12C$ 1,579

Sun 29/124:27 p.m.STL - YYZ

1 stop18h 15mMultiple Airlines

Wed 1/12:55 p.m.YYZ - STL

1 stop25h 26mMultiple Airlines

Deal found 21/12C$ 1,035

Sun 29/128:00 a.m.STL - YYZ

1 stop6h 45mUnited Airlines

Wed 1/11:50 p.m.YYZ - STL

Nonstop2h 16mUnited Airlines

Deal found 21/12C$ 1,425

Sun 29/1211:46 a.m.STL - YYZ

2 stops17h 33mWestJet

Wed 1/16:30 a.m.YYZ - STL

1 stop16h 36mWestJet

Deal found 21/12C$ 1,560

Sun 29/123:50 p.m.STL - YYZ

Nonstop1h 55mAir Canada

Wed 1/11:50 p.m.YYZ - STL

Nonstop2h 16mAir Canada

Deal found 21/12C$ 1,901

Wed 8/16:05 a.m.STL - YYZ

1 stop9h 06mDelta

Wed 22/15:05 p.m.YYZ - STL

1 stop16h 53mDelta

Deal found 21/12C$ 665

Wed 8/112:00 p.m.STL - YYZ

1 stop8h 20mAmerican Airlines

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

1 stop8h 52mAmerican Airlines

Deal found 21/12C$ 741

Wed 8/16:30 a.m.STL - YYZ

2 stops14h 45mUnited Airlines

Sat 11/16:52 a.m.YYZ - STL

1 stop9h 46mUnited Airlines

Deal found 21/12C$ 855

Mon 13/13:50 p.m.STL - YYZ

Nonstop1h 55mAir Canada

Wed 15/11:50 p.m.YYZ - STL

Nonstop2h 16mAir Canada

Deal found 21/12C$ 887

Mon 13/17:00 a.m.STL - YXU

2 stops36h 20mUnited Airlines

Mon 20/19:55 a.m.YXU - STL

2 stops33h 14mUnited Airlines

Deal found 21/12C$ 1,201

Wed 15/112:15 p.m.STL - YYZ

3 stops34h 38mMultiple Airlines

Tue 21/17:05 a.m.YYZ - STL

1 stop8h 38mMultiple Airlines

Deal found 21/12C$ 507

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 22 December 2024.

Mon 6/16:49 p.m.STL - YYZ

2 stops18h 06mMultiple Airlines

Deal found 21/12C$ 262

Wed 1/13:50 p.m.STL - YYZ

Nonstop1h 55mAir Canada

Deal found 21/12C$ 547

Wed 1/16:30 a.m.STL - YYZ

2 stops7h 39mAmerican Airlines

Deal found 21/12C$ 569

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

Wed 15/1

12:15 p.m.-11:53 p.m.

3 stops34h 38m

Toronto Pearson Intl

Tue 21/1

7:05 a.m.-2:43 p.m.

1 stop8h 38m

C$ 507

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Tue 11/3

7:27 p.m.-4:45 p.m.

2 stops20h 18m

Montreal Pierre Elliott Trudeau Intl

Sat 15/3

6:50 a.m.-11:45 a.m.

3 stops29h 55m

C$ 638

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Sat 25/1

8:50 a.m.-10:29 a.m.

1 stop24h 39m

Montreal Pierre Elliott Trudeau Intl

Mon 27/1

6:00 a.m.-8:58 a.m.

1 stop27h 58m

C$ 658

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Wed 8/1

6:05 a.m.-4:11 p.m.

1 stop9h 06m

Toronto Pearson Intl

Wed 22/1

5:05 p.m.-8:58 a.m.

1 stop16h 53m

C$ 665

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Wed 8/1

12:00 p.m.-9:20 p.m.

1 stop8h 20m

Toronto Pearson Intl

Sat 11/1

6:15 a.m.-2:07 p.m.

1 stop8h 52m

C$ 741

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Sat 25/1

5:50 p.m.-10:10 a.m.

2 stops15h 20m

Montreal Pierre Elliott Trudeau Intl

Mon 27/1

4:00 p.m.-8:58 a.m.

2 stops17h 58m

C$ 744

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 6/3

7:00 a.m.-2:55 p.m.

1 stop30h 55m

Toronto Pearson Intl

Sun 16/3

4:10 p.m.-11:59 p.m.

1 stop32h 49m

C$ 769

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

Fri 7/2

5:03 p.m.-10:10 a.m.

1 stop16h 07m

Montreal Pierre Elliott Trudeau Intl

Sun 9/2

10:55 a.m.-8:00 p.m.

1 stop10h 05m

C$ 777

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Wed 8/1

6:30 a.m.-10:15 p.m.

2 stops14h 45m

Toronto Pearson Intl

Sat 11/1

6:52 a.m.-3:38 p.m.

1 stop9h 46m

C$ 855

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Wed 8/1

3:50 p.m.-6:45 p.m.

Nonstop1h 55m

Toronto Pearson Intl

Wed 22/1

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

Nonstop2h 16m

C$ 954

Flights are sorted by cheapest round-trip flights first.

Deals found on 21/12

Showing 1-10 of 19 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 Friday (2 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (1 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 American Airlines, United Airlines and Air Canada. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Alaska Airlines

8.0

Very good

9,537 reviews

Check prices

Reviews

1 / 10

Things were good, crew was good. It was just the flight itself was very rough. Lots of turbulence, probably one of the shakiest flights I've been on. Kids throwing up, kids crying everywhere because of it.

Alaska Airlines

8.0

Very good

9,537 reviews

Alaska Airlines

8.0

Very good

9,537 reviews

Check prices

Reviews

1 / 10

Delta

8.0

Very good

8,594 reviews

Alaska Airlines

8.0

Very good

9,537 reviews

Check prices

Reviews

1 / 10

Porter Airlines

7.9

Good

283 reviews

Alaska Airlines

8.0

Very good

9,537 reviews

Check prices

Reviews

1 / 10

United Airlines

7.4

Good

9,028 reviews

Alaska Airlines

8.0

Very good

9,537 reviews

Check prices

Reviews

1 / 10

American Airlines

7.2

Good

10,000 reviews

Alaska Airlines

8.0

Very good

9,537 reviews

Check prices

Reviews

1 / 10

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 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$ 321. On average you can expect to pay C$ 363. The most popular route, (Lambert-St Louis - Toronto Pearson Intl), can usually be booked for C$ 476.
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

Toronto Region of Waterloo Intl Airport car rentals

London Airport car rentals

Hamilton 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$ 371	AverageC$ 802	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$ 262

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 6/1. 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

Round-trip from

One-way from

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 22 December 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 22 December 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 22 December 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 22 December 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 American Airlines, United Airlines and Air Canada. 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 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 22 December 2024.