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Cheap flights from Ontario to Missouri from C$ 214

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 21/5. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — STL
27 Apr — 4 May1
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 22 April 2025.

Round-trip from

C$ 459

One-way from

C$ 214

Popular in

December

Cheapest in

July

Average price

C$ 767

Good round-trip deal

C$ 540 or less

Good one-way deal

C$ 621 or less
Delta
  • Delta
  • 7/6-18/6
  • 2 total stops
  • 15h 51m total
  • Ontario to Missouri
21/5
  • 21/5
  • 2 total stops
  • 24h 15m total
  • Ontario to Missouri
Highest demand for flights based on searches. 9% potential increase in price (C$ 105 potential increase over avg. RT price).
Cheapest flight prices on average. 2% potential price decrease (C$ 27 potential savings vs. average RT price).
Average for round-trip flights in April 2025
Price to beat on a round-trip flight from Ontario to Missouri.
Price to beat on a one-way flight from Ontario to Missouri.

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 22 April 2025.

Sat 7/67:00 a.m.YUL - MCI
1 stop6h 10mDelta
Wed 18/61:13 p.m.MCI - YUL
1 stop9h 41mDelta
Deal found 21/4C$ 459
Thu 5/61:00 p.m.YYZ - STL
1 stop7h 58mAir Canada
Tue 10/65:27 p.m.STL - YYZ
1 stop5h 31mAir Canada
Deal found 21/4C$ 510
Wed 11/612:45 p.m.YUL - MCI
1 stop23h 14mWestJet
Wed 18/612:04 p.m.MCI - YUL
1 stop10h 50mWestJet
Deal found 20/4C$ 512
Sat 7/66:10 a.m.YUL - MCI
1 stop5h 24mMultiple Airlines
Wed 18/611:05 a.m.MCI - YUL
2 stops12h 32mMultiple Airlines
Deal found 21/4C$ 517
Thu 1/59:50 a.m.YYZ - STL
1 stop15h 16mMultiple Airlines
Mon 5/59:55 p.m.STL - YYZ
1 stop18h 25mMultiple Airlines
Deal found 21/4C$ 533
Mon 2/66:10 p.m.YUL - STL
Nonstop2h 48mAir Canada
Mon 9/67:30 a.m.STL - YUL
1 stop4h 51mAir Canada
Deal found 21/4C$ 539
Tue 17/610:40 a.m.YYZ - MCI
1 stop10h 49mMultiple Airlines
Sun 22/66:00 a.m.MCI - YYZ
1 stop15h 44mMultiple Airlines
Deal found 21/4C$ 543
Thu 5/66:30 p.m.YYZ - STL
Nonstop2h 13mUnited Airlines
Thu 12/68:10 a.m.STL - YYZ
1 stop14h 48mUnited Airlines
Deal found 21/4C$ 559
Sat 31/56:30 a.m.YYZ - MCI
1 stop10h 01mAmerican Airlines
Sat 31/55:46 p.m.MCI - YYZ
1 stop4h 29mAmerican Airlines
Deal found 21/4C$ 564
Sat 7/612:15 p.m.YYZ - MCI
1 stop5h 17mDelta
Fri 13/65:44 p.m.MCI - YYZ
1 stop4h 14mDelta
Deal found 21/4C$ 566
Fri 25/48:05 a.m.YUL - MCI
2 stops12h 44mUnited Airlines
Fri 2/53:10 p.m.MCI - YUL
2 stops15h 38mUnited Airlines
Deal found 20/4C$ 624
Wed 21/58:00 a.m.YYZ - STL
2 stops10h 00mWestJet
Tue 27/55:40 p.m.STL - YYZ
1 stop5h 16mWestJet
Deal found 21/4C$ 641

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 22 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

Sat 7/6

7:00 a.m.-12:10 p.m.

1 stop6h 10m

Kansas City

Wed 18/6

1:13 p.m.-11:54 p.m.

1 stop9h 41m

C$ 459

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 5/6

1:00 p.m.-7:58 p.m.

1 stop7h 58m

Lambert-St Louis

Tue 10/6

5:27 p.m.-11:58 p.m.

1 stop5h 31m

C$ 510

MontrealKansas City

YUL - MCI

YULMCI

Montreal Pierre Elliott Trudeau Intl

Wed 11/6

12:45 p.m.-10:59 a.m.

1 stop23h 14m

Kansas City

Wed 18/6

12:04 p.m.-11:54 p.m.

1 stop10h 50m

C$ 512

MontrealKansas City

YUL - MCI

YULMCI

Montreal Pierre Elliott Trudeau Intl

Sat 7/6

6:10 a.m.-10:34 a.m.

1 stop5h 24m

Kansas City

Wed 18/6

11:05 a.m.-12:37 a.m.

2 stops12h 32m

C$ 517

MontrealSt. Louis

YUL - STL

YULSTL

Montreal Pierre Elliott Trudeau Intl

Mon 2/6

6:10 p.m.-7:58 p.m.

Nonstop2h 48m

Lambert-St Louis

Mon 9/6

7:30 a.m.-1:21 p.m.

1 stop4h 51m

C$ 539

TorontoKansas City

YYZ - MCI

YYZMCI

Toronto Pearson Intl

Tue 17/6

10:40 a.m.-8:29 p.m.

1 stop10h 49m

Kansas City

Sun 22/6

6:00 a.m.-10:44 p.m.

1 stop15h 44m

C$ 543

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 5/6

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

Nonstop2h 13m

Lambert-St Louis

Thu 12/6

8:10 a.m.-11:58 p.m.

1 stop14h 48m

C$ 559

TorontoKansas City

YYZ - MCI

YYZMCI

Toronto Pearson Intl

Sat 31/5

6:30 a.m.-3:31 p.m.

1 stop10h 01m

Kansas City

Sat 31/5

5:46 p.m.-11:15 p.m.

1 stop4h 29m

C$ 564

TorontoKansas City

YYZ - MCI

YYZMCI

Toronto Pearson Intl

Sat 7/6

12:15 p.m.-4:32 p.m.

1 stop5h 17m

Kansas City

Fri 13/6

5:44 p.m.-10:58 p.m.

1 stop4h 14m

C$ 566

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 8/5

9:50 a.m.-12:06 a.m.

1 stop15h 16m

Lambert-St Louis

Sun 11/5

9:55 p.m.-5:20 p.m.

1 stop18h 25m

C$ 609

Flights are sorted by cheapest round-trip flights first.

Deals found on 21/4

Showing 1-10 of 58 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 22 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.

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 22 April 2025.

The most flights from CAON to USMO are scheduled on a Monday (2 on average). You will have fewer flight options on Saturday, 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 22 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.

Entertainment

7.1

Boarding

8.2

Comfort

7.9

Food

7.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Entertainment

7.1

Boarding

8.2

Comfort

7.9

Food

7.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
8.0
Very good

Entertainment

7.1

Boarding

8.2

Comfort

7.9

Food

7.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Entertainment

7.1

Boarding

8.2

Comfort

7.9

Food

7.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Entertainment

7.1

Boarding

8.2

Comfort

7.9

Food

7.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Entertainment

7.1

Boarding

8.2

Comfort

7.9

Food

7.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

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 Delta (C$ 235), Air Canada (C$ 265), and United Airlines (C$ 271).

  • 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.

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 22 April 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 427AverageC$ 660FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
DeltaCheapestC$ 555AverageC$ 674FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
United AirlinesCheapestC$ 564AverageC$ 863FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
American AirlinesCheapestC$ 593AverageC$ 722FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
WestJetCheapestC$ 609AverageC$ 800FlexibilityNo cancel feeOn-time60%
Search WestJet flights

Fly with Cheapflights

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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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