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Cheap flights from Ontario to Missouri from C$ 217

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 29/4. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — STL
6 Apr — 13 Apr1
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 1 April 2025.

Round-trip from

C$ 477

One-way from

C$ 217

Popular in

December

Cheapest in

July

Average price

C$ 746

Good round-trip deal

C$ 545 or less

Good one-way deal

C$ 645 or less
Delta
  • Delta
  • 11/4-13/4
  • 2 total stops
  • 11h 43m total
  • Ontario to Missouri
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29/4
  • 29/4
  • 1 total stop
  • 8h 25m total
  • Ontario to Missouri
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Highest demand for flights based on searches. 10% potential increase in price (C$ 128 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease (C$ 29 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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Price to beat on a round-trip flight from Ontario to Missouri.
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Price to beat on a one-way flight from Ontario to Missouri.
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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 1 April 2025.

Fri 11/46:00 p.m.YUL - MCI
1 stop7h 01mDelta
Sun 13/46:15 a.m.MCI - YUL
1 stop4h 42mDelta
Deal found 30/3C$ 477
Fri 9/56:45 a.m.YUL - MCI
2 stops28h 46mMultiple Airlines
Mon 12/52:45 p.m.MCI - YUL
1 stop22h 35mMultiple Airlines
Deal found 31/3C$ 510
Fri 9/56:45 p.m.YUL - MCI
1 stop17h 22mWestJet
Mon 12/55:26 p.m.MCI - YUL
1 stop23h 14mWestJet
Deal found 31/3C$ 511
Thu 10/45:50 p.m.YYZ - MCI
2 stops22h 36mMultiple Airlines
Fri 9/511:43 a.m.MCI - YYZ
1 stop8h 25mMultiple Airlines
Deal found 30/3C$ 530
Thu 10/411:10 a.m.YYZ - STL
1 stop13h 36mMultiple Airlines
Fri 9/59:50 a.m.STL - YYZ
2 stops10h 18mMultiple Airlines
Deal found 31/3C$ 534
Thu 10/410:35 p.m.YYZ - SGF
2 stops23h 34mMultiple Airlines
Mon 14/49:59 p.m.SGF - YYZ
1 stop17h 18mMultiple Airlines
Deal found 31/3C$ 541
Thu 1/56:30 p.m.YYZ - STL
Nonstop2h 13mAir Canada
Wed 7/57:30 a.m.STL - YYZ
Nonstop1h 55mAir Canada
Deal found 31/3C$ 544
Wed 6/85:15 p.m.YYZ - STL
1 stop6h 30mUnited Airlines
Tue 2/99:17 a.m.STL - YYZ
1 stop6h 26mUnited Airlines
Deal found 31/3C$ 571
Mon 19/56:20 p.m.YYZ - STL
1 stop6h 31mAmerican Airlines
Sat 24/56:20 a.m.STL - YYZ
1 stop8h 20mAmerican Airlines
Deal found 31/3C$ 586
Thu 1/56:45 a.m.YUL - STL
1 stop18h 21mMultiple Airlines
Wed 7/55:45 p.m.STL - YUL
1 stop19h 35mMultiple Airlines
Deal found 31/3C$ 591
Tue 15/49:20 a.m.YOW - STL
1 stop8h 55mMultiple Airlines
Thu 8/510:10 a.m.STL - YOW
2 stops13h 12mMultiple Airlines
Deal found 1/4C$ 596
Mon 5/56:49 p.m.YYZ - MCI
1 stop17h 06mDelta
Wed 7/55:35 p.m.MCI - YYZ
1 stop19h 05mDelta
Deal found 1/4C$ 632

Cheapflights Fare Finder

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 1 April 2025.
Use the filters below to find and compare flights from Ontario to Missouri that are best for you.

Fly from

Ontario

Fly to

Missouri

Route

Depart

Return

Price

MontrealKansas City

YUL - MCI

YULMCI

Montreal Pierre Elliott Trudeau Intl

Fri 11/4

6:00 p.m.-12:01 a.m.

1 stop7h 01m

Kansas City

Sun 13/4

6:15 a.m.-11:57 a.m.

1 stop4h 42m

C$ 477

MontrealKansas City

YUL - MCI

YULMCI

Montreal Pierre Elliott Trudeau Intl

Fri 9/5

6:45 a.m.-10:31 a.m.

2 stops28h 46m

Kansas City

Mon 12/5

2:45 p.m.-2:20 p.m.

1 stop22h 35m

C$ 510

MontrealKansas City

YUL - MCI

YULMCI

Montreal Pierre Elliott Trudeau Intl

Fri 9/5

6:45 p.m.-11:07 a.m.

1 stop17h 22m

Kansas City

Mon 12/5

5:26 p.m.-5:40 p.m.

1 stop23h 14m

C$ 511

TorontoSpringfield

YYZ - SGF

YYZSGF

Toronto Pearson Intl

Thu 10/4

10:35 p.m.-9:09 p.m.

2 stops23h 34m

Springfield-Branson

Mon 14/4

9:59 p.m.-4:17 p.m.

1 stop17h 18m

C$ 541

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 1/5

6:30 p.m.-7:43 p.m.

Nonstop2h 13m

Lambert-St Louis

Wed 7/5

7:30 a.m.-10:25 a.m.

Nonstop1h 55m

C$ 544

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 29/4

6:30 a.m.-5:15 p.m.

1 stop11h 45m

Lambert-St Louis

Tue 6/5

5:45 p.m.-11:47 p.m.

1 stop29h 02m

C$ 545

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Wed 21/5

10:20 a.m.-3:08 p.m.

1 stop5h 48m

Lambert-St Louis

Tue 27/5

6:00 a.m.-1:40 p.m.

1 stop6h 40m

C$ 560

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Wed 6/8

5:15 p.m.-10:45 p.m.

1 stop6h 30m

Lambert-St Louis

Tue 2/9

9:17 a.m.-4:43 p.m.

1 stop6h 26m

C$ 571

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Mon 19/5

6:20 p.m.-11:51 p.m.

1 stop6h 31m

Lambert-St Louis

Sat 24/5

6:20 a.m.-3:40 p.m.

1 stop8h 20m

C$ 586

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Thu 1/5

6:45 a.m.-12:06 a.m.

1 stop18h 21m

Lambert-St Louis

Wed 7/5

5:45 p.m.-2:20 p.m.

1 stop19h 35m

C$ 591

Flights are sorted by cheapest round-trip flights first.

Deals found on 31/3

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.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Missouri

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 1 April 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.

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 1 April 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
9,820 reviews
Check prices

Comfort

7.9

Entertainment

7.1

Overall

8.0

Boarding

8.2

Crew

8.5

Food

7.1

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
9,820 reviews
Alaska Airlines
8.0
Very good
9,820 reviews
Check prices

Comfort

7.9

Entertainment

7.1

Overall

8.0

Boarding

8.2

Crew

8.5

Food

7.1

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
7,898 reviews
Alaska Airlines
8.0
Very good
9,820 reviews
Check prices

Comfort

7.9

Entertainment

7.1

Overall

8.0

Boarding

8.2

Crew

8.5

Food

7.1

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
8,615 reviews
Alaska Airlines
8.0
Very good
9,820 reviews
Check prices

Comfort

7.9

Entertainment

7.1

Overall

8.0

Boarding

8.2

Crew

8.5

Food

7.1

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
9,820 reviews
Check prices

Comfort

7.9

Entertainment

7.1

Overall

8.0

Boarding

8.2

Crew

8.5

Food

7.1

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
2,789 reviews
Alaska Airlines
8.0
Very good
9,820 reviews
Check prices

Comfort

7.9

Entertainment

7.1

Overall

8.0

Boarding

8.2

Crew

8.5

Food

7.1

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 United Airlines (C$ 274), Delta (C$ 286), and Air Canada (C$ 316).

  • 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

Browse thousands of different options on Cheapflights for your next trip

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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.
Pearson Intl to Newark flights
Pierre Elliott Trudeau Intl to Fort Lauderdale flights
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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 1 April 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 444AverageC$ 687FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
DeltaCheapestC$ 577AverageC$ 644FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
United AirlinesCheapestC$ 601AverageC$ 884FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
American AirlinesCheapestC$ 616AverageC$ 751FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
WestJetCheapestC$ 633AverageC$ 844FlexibilityNo 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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