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Cheap flights from Ontario to Missouri from C$ 202

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 1/4. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — STL
26 Feb — 5 Mar1
1 adult

Cheap flight deals from Ontario to Missouri

Keep the following information in mind while searching for Ontario to Missouri flight deals. Data was last updated 21 February 2025.

Round-trip from

C$ 428

One-way from

C$ 227

Popular in

January

Cheapest in

February

Average price

C$ 611

Good round-trip deal

C$ 682 or less

Good one-way deal

C$ 808 or less
5/4-15/4
  • 5/4-15/4
  • 2 total stops
  • 46h 41m total
  • Ontario to Missouri
Search Deals
11/3
  • 11/3
  • 2 total stops
  • 10h 57m total
  • Ontario to Missouri
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (C$ 136 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (C$ 53 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2025
Search Deals
Price to beat on a round-trip flight from Ontario to Missouri.
Search Deals
Price to beat on a one-way flight from Ontario to Missouri.
Search Deals

Find flight deals from Ontario to Missouri

Cheapest flights from Ontario to Missouri
Explore the most affordable flight options available from Ontario to Missouri. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 February 2025.

Sat 5/43:55 p.m.YUL - STL
1 stop26h 57mMultiple Airlines
Tue 15/46:11 p.m.STL - YUL
1 stop19h 44mMultiple Airlines
Deal found 20/2C$ 428
Sat 15/31:15 p.m.YUL - MCI
2 stops20h 57mUnited Airlines
Thu 3/46:00 a.m.MCI - YUL
2 stops11h 00mUnited Airlines
Deal found 19/2C$ 467
Fri 4/412:30 p.m.YUL - MCI
1 stop12h 19mAmerican Airlines
Mon 7/46:29 a.m.MCI - YUL
1 stop15h 15mAmerican Airlines
Deal found 20/2C$ 482
Mon 3/32:55 p.m.YYZ - MCI
2 stops28h 32mMultiple Airlines
Fri 7/310:20 a.m.MCI - YYZ
1 stop12h 24mMultiple Airlines
Deal found 20/2C$ 496
Sun 6/47:05 a.m.YUL - MCI
1 stop7h 23mWestJet
Sun 13/41:22 p.m.MCI - YUL
1 stop9h 37mWestJet
Deal found 19/2C$ 550
Fri 7/36:00 a.m.YUL - MCI
1 stop9h 27mAir Canada
Mon 10/36:25 p.m.MCI - YUL
1 stop15h 07mAir Canada
Deal found 20/2C$ 555
Fri 4/41:40 p.m.YYZ - STL
Nonstop2h 09mAir Canada
Fri 11/43:30 p.m.STL - YYZ
Nonstop2h 00mAir Canada
Deal found 19/2C$ 577
Wed 19/37:55 a.m.YYZ - MCI
1 stop9h 45mDelta
Thu 27/36:00 a.m.MCI - YYZ
1 stop9h 11mDelta
Deal found 20/2C$ 584
Thu 20/39:15 a.m.YUL - STL
1 stop6h 51mAir Canada
Mon 24/33:50 p.m.STL - YUL
1 stop6h 58mAir Canada
Deal found 20/2C$ 584
Thu 3/410:15 a.m.YYZ - MCI
1 stop7h 04mAir Canada
Sun 6/410:05 a.m.MCI - YYZ
1 stop4h 41mAir Canada
Deal found 19/2C$ 589
Tue 1/411:30 a.m.YYZ - STL
1 stop11h 48mAmerican Airlines
Sat 5/412:00 p.m.STL - YYZ
1 stop10h 25mAmerican Airlines
Deal found 19/2C$ 594
Sun 6/41:40 p.m.YYZ - STL
Nonstop2h 09mUnited Airlines
Sun 13/43:30 p.m.STL - YYZ
Nonstop2h 00mUnited Airlines
Deal found 19/2C$ 597

Find flights from Ontario to Missouri within your budget

Customize your flight search to find flights from Ontario to Missouri that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 21 February 2025.

Fly from

Ontario

Fly to

Missouri

Route

Depart

Return

Price

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Sat 5/4

3:55 p.m.-5:52 p.m.

1 stop26h 57m

Lambert-St Louis

Tue 15/4

6:11 p.m.-2:55 p.m.

1 stop19h 44m

C$ 428

MontrealKansas City

YUL - MCI

YULMCI

Montreal Pierre Elliott Trudeau Intl

Sat 15/3

1:15 p.m.-9:17 p.m.

1 stop9h 02m

Kansas City

Thu 3/4

7:45 a.m.-2:51 p.m.

1 stop6h 06m

C$ 467

MontrealKansas City

YUL - MCI

YULMCI

Montreal Pierre Elliott Trudeau Intl

Fri 4/4

12:30 p.m.-11:49 p.m.

1 stop12h 19m

Kansas City

Mon 7/4

6:29 a.m.-10:44 p.m.

1 stop15h 15m

C$ 482

TorontoKansas City

YYZ - MCI

YYZMCI

Toronto Pearson Intl

Mon 3/3

2:55 p.m.-6:27 p.m.

2 stops28h 32m

Kansas City

Fri 7/3

10:20 a.m.-11:44 p.m.

1 stop12h 24m

C$ 496

MontrealKansas City

YUL - MCI

YULMCI

Montreal Pierre Elliott Trudeau Intl

Sun 6/4

7:05 a.m.-1:28 p.m.

1 stop7h 23m

Kansas City

Sun 13/4

1:22 p.m.-11:59 p.m.

1 stop9h 37m

C$ 550

MontrealKansas City

YUL - MCI

YULMCI

Montreal Pierre Elliott Trudeau Intl

Fri 7/3

6:00 a.m.-2:27 p.m.

1 stop9h 27m

Kansas City

Mon 10/3

6:25 p.m.-10:32 a.m.

1 stop15h 07m

C$ 555

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Fri 21/3

6:52 a.m.-4:45 p.m.

2 stops10h 53m

Lambert-St Louis

Sun 23/3

6:47 p.m.-11:42 a.m.

1 stop15h 55m

C$ 577

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 1/4

1:40 p.m.-2:49 p.m.

Nonstop2h 09m

Lambert-St Louis

Sat 5/4

3:30 p.m.-6:30 p.m.

Nonstop2h 00m

C$ 578

TorontoKansas City

YYZ - MCI

YYZMCI

Toronto Pearson Intl

Wed 19/3

7:55 a.m.-4:40 p.m.

1 stop9h 45m

Kansas City

Thu 27/3

6:00 a.m.-4:11 p.m.

1 stop9h 11m

C$ 584

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Thu 20/3

9:15 a.m.-3:06 p.m.

1 stop6h 51m

Lambert-St Louis

Mon 24/3

3:50 p.m.-11:48 p.m.

1 stop6h 58m

C$ 584

Flights are sorted by cheapest round-trip flights first.

Deals found on 18/2

Showing 1-10 of 53 results
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Best time to book a flight from Ontario to Missouri

Have a flexible travel schedule? Discover the best time to fly to Missouri from Ontario 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 Ontario to Missouri

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

What is the cheapest month to book a flight from Region of Ontario to Missouri?

Currently, January is the cheapest month in which you can book a flight from Region of Ontario to Missouri (average of C$ 365). Flying from Region of Ontario to Missouri in September is currently the most expensive (average of C$ 491). 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 ON to MO?

Find hourly flight availability from Ontario to Missouri. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 21 February 2025.

When flying from Region of Ontario to Missouri, 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 Region of Ontario to Missouri

Explore weekly flight availability from Ontario to Missouri. 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 21 February 2025.

The most flights from CAON to USMO are scheduled on a Wednesday (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 Missouri by month

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

In terms of precipitation, rainfall in Missouri ranges from 28.0 - 132.0 mm per month. May is typically the wettest month, when rainfall can reach 132.0 mm. January is typically the driest time to visit Missouri when rainfall is around 28.0 mm.

Temperature in Missouri by month

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

If weather is an important factor for your trip to Missouri, 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 26.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -2.0 C).

Reviews of airlines servicing Missouri

Get insights into the airlines that provide service to Missouri. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Missouri. Reviews last updated 21 February 2025.
Read through reviews of airlines operating flights from Ontario to Missouri, such as Alaska Airlines, Delta 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
9,697 reviews
Check prices

Crew

8.5

Overall

8.0

Boarding

8.2

Entertainment

7.1

Food

7.1

Comfort

7.9

Reviews

1 / 20

10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Alaska Airlines
8.0
Very good
9,697 reviews
Alaska Airlines
8.0
Very good
9,697 reviews
Check prices

Crew

8.5

Overall

8.0

Boarding

8.2

Entertainment

7.1

Food

7.1

Comfort

7.9

Reviews

1 / 20

10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Delta
8.0
Very good
8,219 reviews
Alaska Airlines
8.0
Very good
9,697 reviews
Check prices

Crew

8.5

Overall

8.0

Boarding

8.2

Entertainment

7.1

Food

7.1

Comfort

7.9

Reviews

1 / 20

10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

United Airlines
7.4
Good
8,765 reviews
Alaska Airlines
8.0
Very good
9,697 reviews
Check prices

Crew

8.5

Overall

8.0

Boarding

8.2

Entertainment

7.1

Food

7.1

Comfort

7.9

Reviews

1 / 20

10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
9,697 reviews
Check prices

Crew

8.5

Overall

8.0

Boarding

8.2

Entertainment

7.1

Food

7.1

Comfort

7.9

Reviews

1 / 20

10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

WestJet
7.2
Good
2,801 reviews
Alaska Airlines
8.0
Very good
9,697 reviews
Check prices

Crew

8.5

Overall

8.0

Boarding

8.2

Entertainment

7.1

Food

7.1

Comfort

7.9

Reviews

1 / 20

10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Related info for your journey

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

  • What are the cheapest airlines to fly from Region of Ontario to Missouri one-way?

    The cheapest airlines for a one-way flight from Region of Ontario to Missouri are Air Canada (C$ 274), United Airlines (C$ 276), and Delta (C$ 297).

  • Can I find deals for flights from Ontario to Missouri that include hotel bookings?

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

  • How can I find direct flights from Ontario to Missouri?

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

  • Can I find deals for business class flights from Ontario to Missouri?

    Yes. Cheapflights offers flight deals from Ontario to Missouri 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 Region of Ontario to Missouri?

    Currently, January is the cheapest month in which you can book a flight from Region of Ontario to Missouri (average of C$ 365). Flying from Region of Ontario to Missouri in September is currently the most expensive (average of C$ 491). 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

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Alternative routes for Ontario to Missouri

See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from Ontario to Missouri

Discover the top 5 airlines that operate flights from Ontario to Missouri. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 21 February 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 530AverageC$ 782FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
DeltaCheapestC$ 549AverageC$ 625FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
United AirlinesCheapestC$ 559AverageC$ 891FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
American AirlinesCheapestC$ 609AverageC$ 749FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
WestJetCheapestC$ 637AverageC$ 829FlexibilityNo cancel feeOn-time60%
Search WestJet flights

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 Ontario to Missouri?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Ontario to Missouri. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Ontario to Missouri?

Cheapflights helps you find that perfect flight to Missouri from Ontario by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Ontario to Missouri with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Ontario to Missouri, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from Ontario to Missouri become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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