Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from Ontario to Missouri from C$ 241

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 25/5. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — STL
5 May — 12 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 30 April 2025.

Round-trip from

C$ 498

One-way from

C$ 257

Popular in

December

Cheapest in

June

Average price

C$ 768

Good round-trip deal

C$ 544 or less

Good one-way deal

C$ 294 or less
10/5-12/5
  • 10/5-12/5
  • 2 total stops
  • 53h 02m total
  • Ontario to Missouri
Search Deals
13/7
  • 13/7
  • 1 total stop
  • 18h 58m total
  • Ontario to Missouri
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (C$ 103 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 26 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 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 30 April 2025.

Sat 10/56:30 a.m.YYZ - STL
1 stop27h 45mMultiple Airlines
Mon 12/59:55 p.m.STL - YYZ
1 stop25h 17mMultiple Airlines
Deal found 27/4C$ 498
Thu 29/57:00 a.m.YUL - MCI
1 stop6h 10mDelta
Thu 5/62:05 p.m.MCI - YUL
1 stop8h 11mDelta
Deal found 29/4C$ 501
Sat 7/66:15 a.m.YUL - MCI
1 stop5h 23mMultiple Airlines
Wed 18/611:05 a.m.MCI - YUL
2 stops12h 32mMultiple Airlines
Deal found 29/4C$ 558
Mon 23/611:30 a.m.YYZ - STL
Nonstop2h 06mUnited Airlines
Wed 25/67:30 a.m.STL - YYZ
Nonstop1h 55mUnited Airlines
Deal found 28/4C$ 561
Fri 30/53:50 p.m.YOW - STL
1 stop18h 25mMultiple Airlines
Sun 1/65:45 p.m.STL - YOW
1 stop22h 21mMultiple Airlines
Deal found 29/4C$ 563
Fri 30/59:49 a.m.YYZ - STL
1 stop4h 30mDelta
Sun 1/66:00 a.m.STL - YYZ
1 stop6h 40mDelta
Deal found 28/4C$ 568
Tue 27/53:35 p.m.YOW - MCI
2 stops27h 10mMultiple Airlines
Tue 3/66:45 p.m.MCI - YOW
1 stop24h 10mMultiple Airlines
Deal found 29/4C$ 569
Mon 9/64:00 p.m.YYZ - MCI
1 stop7h 41mMultiple Airlines
Wed 11/65:46 a.m.MCI - YYZ
1 stop7h 09mMultiple Airlines
Deal found 29/4C$ 570
Thu 22/511:30 a.m.YYZ - STL
Nonstop2h 06mAir Canada
Sun 25/52:30 p.m.STL - YYZ
Nonstop2h 00mAir Canada
Deal found 29/4C$ 577
Fri 5/96:24 p.m.YYZ - STL
1 stop6h 25mAmerican Airlines
Sun 7/95:29 a.m.STL - YYZ
1 stop8h 26mAmerican Airlines
Deal found 28/4C$ 580
Tue 6/54:05 p.m.YUL - MCI
1 stop8h 39mUnited Airlines
Tue 13/511:40 a.m.MCI - YUL
1 stop10h 46mUnited Airlines
Deal found 29/4C$ 584
Thu 29/56:45 a.m.YUL - MCI
2 stops13h 06mWestJet
Thu 5/65:48 p.m.MCI - YUL
1 stop4h 28mWestJet
Deal found 29/4C$ 598

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 30 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

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sat 10/5

6:30 a.m.-9:15 a.m.

1 stop27h 45m

Lambert-St Louis

Mon 12/5

9:55 p.m.-12:12 a.m.

1 stop25h 17m

C$ 498

MontrealKansas City

YUL - MCI

YULMCI

Montreal Pierre Elliott Trudeau Intl

Thu 29/5

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

1 stop6h 10m

Kansas City

Thu 5/6

2:05 p.m.-11:16 p.m.

1 stop8h 11m

C$ 501

MontrealKansas City

YUL - MCI

YULMCI

Montreal Pierre Elliott Trudeau Intl

Sat 7/6

6:15 a.m.-10:38 a.m.

1 stop5h 23m

Kansas City

Wed 18/6

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

2 stops12h 32m

C$ 558

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Mon 23/6

11:30 a.m.-12:36 p.m.

Nonstop2h 06m

Lambert-St Louis

Wed 25/6

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

Nonstop1h 55m

C$ 561

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Fri 30/5

3:50 p.m.-9:15 a.m.

1 stop18h 25m

Lambert-St Louis

Sun 1/6

5:45 p.m.-5:06 p.m.

1 stop22h 21m

C$ 563

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Fri 30/5

9:49 a.m.-1:19 p.m.

1 stop4h 30m

Lambert-St Louis

Sun 1/6

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

1 stop6h 40m

C$ 568

OttawaKansas City

YOW - MCI

YOWMCI

Ottawa

Tue 27/5

3:35 p.m.-5:45 p.m.

2 stops27h 10m

Kansas City

Tue 3/6

6:45 p.m.-7:55 p.m.

1 stop24h 10m

C$ 569

TorontoKansas City

YYZ - MCI

YYZMCI

Toronto Pearson Intl

Mon 9/6

4:00 p.m.-10:41 p.m.

1 stop7h 41m

Kansas City

Wed 11/6

5:46 a.m.-1:55 p.m.

1 stop7h 09m

C$ 570

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 22/5

11:30 a.m.-12:36 p.m.

Nonstop2h 06m

Lambert-St Louis

Sun 25/5

2:30 p.m.-5:30 p.m.

Nonstop2h 00m

C$ 577

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Fri 5/9

6:24 p.m.-11:49 p.m.

1 stop6h 25m

Lambert-St Louis

Sun 7/9

5:29 a.m.-2:55 p.m.

1 stop8h 26m

C$ 580

Flights are sorted by cheapest round-trip flights first.

Deals found on 28/4

Showing 1-10 of 53 results
1
2
3
...
6

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 30 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 30 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
9,961 reviews
Check prices

Overall

8.0

Crew

8.5

Food

7.1

Boarding

8.2

Comfort

7.9

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
9,961 reviews
Alaska Airlines
8.0
Very good
9,961 reviews
Check prices

Overall

8.0

Crew

8.5

Food

7.1

Boarding

8.2

Comfort

7.9

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,936 reviews
Alaska Airlines
8.0
Very good
9,961 reviews
Check prices

Overall

8.0

Crew

8.5

Food

7.1

Boarding

8.2

Comfort

7.9

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,696 reviews
Alaska Airlines
8.0
Very good
9,961 reviews
Check prices

Overall

8.0

Crew

8.5

Food

7.1

Boarding

8.2

Comfort

7.9

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
9,961 reviews
Check prices

Overall

8.0

Crew

8.5

Food

7.1

Boarding

8.2

Comfort

7.9

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
WestJet
7.2
Good
2,823 reviews
Alaska Airlines
8.0
Very good
9,961 reviews
Check prices

Overall

8.0

Crew

8.5

Food

7.1

Boarding

8.2

Comfort

7.9

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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$ 291), Air Canada (C$ 327), and Delta (C$ 350).

  • 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

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

Alternative routes for Ontario to Missouri

See prices for flight routes from nearby airports that may be better suited for you.
Toronto Island to Newark flights
Pearson Intl to Newark flights
Pearson Intl to Las Vegas flights
Pearson Intl to John F Kennedy Intl flights
Pearson Intl to LaGuardia flights
Pierre Elliott Trudeau Intl to LaGuardia flights
Pierre Elliott Trudeau Intl to Fort Lauderdale flights
Pierre Elliott Trudeau Intl to Newark flights
Pearson Intl to Los Angeles flights
Pearson Intl to San Francisco flights
Pearson Intl to Fort Lauderdale flights
Pearson Intl to O'Hare Intl flights
Pearson Intl to Miami flights
Pierre Elliott Trudeau Intl to Miami flights
Vancouver Intl to Las Vegas flights
Vancouver Intl to Newark flights
Pierre Elliott Trudeau Intl to John F Kennedy Intl flights
Pearson Intl to Orlando flights
Pearson Intl to Dallas/Fort Worth flights
Vancouver Intl to John F Kennedy Intl flights
Vancouver Intl to Los Angeles flights
Pierre Elliott Trudeau Intl to Las Vegas flights
Pearson Intl to Nashville flights
Pearson Intl to Dulles Intl flights
Pierre Elliott Trudeau Intl to Los Angeles flights
Pearson Intl to Reagan-National flights
Pearson Intl to Seattle flights
Pearson Intl to Hobby flights
Vancouver Intl to LaGuardia flights
Pearson Intl to Boston flights
Vancouver Intl to San Francisco flights
Vancouver Intl to O'Hare Intl flights
Pearson Intl to Tampa flights
Vancouver Intl to Honolulu flights
Toronto Island to Boston flights
Pearson Intl to Atlanta flights
Pierre Elliott Trudeau Intl to Orlando flights
Vancouver Intl to Sky Harbor Intl flights
Pearson Intl to George Bush Intcntl flights
Pierre Elliott Trudeau Intl to O'Hare Intl flights
Vancouver Intl to Seattle flights
Vancouver Intl to San Diego flights
Pearson Intl to Sky Harbor Intl flights
Toronto Island to Dulles Intl flights
Pierre Elliott Trudeau Intl to San Francisco flights
Vancouver Intl to Minneapolis flights
Calgary to Las Vegas flights
Pierre Elliott Trudeau Intl to Boston flights
Calgary to Los Angeles flights
Pearson Intl to Denver flights

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 30 April 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 428AverageC$ 661FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 546AverageC$ 860FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
DeltaCheapestC$ 556AverageC$ 685FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
American AirlinesCheapestC$ 565AverageC$ 698FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
WestJetCheapestC$ 611AverageC$ 801FlexibilityNo 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!

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.