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Cheap flights from Ontario to Missouri from C$ 261

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 16/9. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — STL
1 Sep — 8 Sep1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Ontario to Missouri

Enter your travel dates to find the best prices.

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 2 August 2026.

Sat 17/107:29 a.m.
YYZ
-
STL
1 stop10h 14m
American Airlines
Mon 26/105:00 a.m.
STL
-
YYZ
1 stop8h 33m
American Airlines
Deal found 30/7C$ 439
Mon 14/93:13 p.m.
YYZ
-
STL
1 stop10h 14m
American Airlines
Mon 21/97:21 a.m.
STL
-
YYZ
1 stop10h 14m
American Airlines
Deal found 28/7C$ 454
Tue 8/91:15 p.m.
YYZ
-
STL
1 stop11h 59m
American Airlines
Fri 11/95:00 a.m.
STL
-
YYZ
1 stop8h 32m
American Airlines
Deal found 29/7C$ 461
Tue 15/96:30 a.m.
YYZ
-
STL
1 stop7h 46m
American Airlines
Thu 17/95:00 a.m.
STL
-
YYZ
1 stop8h 32m
American Airlines
Deal found 28/7C$ 468
Sun 8/116:30 a.m.
YYZ
-
STL
1 stop14h 09m
Multiple Airlines
Mon 9/1110:35 a.m.
STL
-
YYZ
2 stops30h 05m
Multiple Airlines
Deal found 31/7C$ 472
Mon 9/117:09 a.m.
YYZ
-
STL
1 stop10h 34m
American Airlines
Tue 10/117:24 a.m.
STL
-
YYZ
1 stop9h 17m
American Airlines
Deal found 1/8C$ 495
Tue 25/83:14 p.m.
YYZ
-
STL
1 stop10h 00m
American Airlines
Tue 1/96:00 a.m.
STL
-
YYZ
1 stop7h 33m
American Airlines
Deal found 28/7C$ 496
Thu 10/96:30 a.m.
YYZ
-
STL
1 stop7h 46m
American Airlines
Mon 14/97:21 a.m.
STL
-
YYZ
1 stop10h 14m
American Airlines
Deal found 31/7C$ 504
Thu 17/96:00 a.m.
YYZ
-
MCI
1 stop8h 54m
American Airlines
Sat 19/97:44 a.m.
MCI
-
YYZ
1 stop9h 58m
American Airlines
Deal found 28/7C$ 507
Mon 21/93:45 p.m.
YYZ
-
MCI
1 stop8h 14m
American Airlines
Tue 22/96:28 a.m.
MCI
-
YYZ
1 stop9h 32m
American Airlines
Deal found 28/7C$ 520
Fri 18/96:00 a.m.
YYZ
-
MCI
1 stop8h 54m
American Airlines
Mon 21/96:00 a.m.
MCI
-
YYZ
1 stop10h 15m
American Airlines
Deal found 28/7C$ 523
Sun 20/96:15 a.m.
YYZ
-
MCI
1 stop6h 55m
American Airlines
Tue 22/95:13 a.m.
MCI
-
YYZ
1 stop6h 22m
American Airlines
Deal found 28/7C$ 538

Find flight deals from Ontario to Missouri

Keep the following information in mind while searching for Ontario to Missouri flight deals. Data was last updated 2 August 2026.

Round-trip from

C$ 439

One-way from

C$ 261

Popular in

July

Cheapest in

April

Average price

C$ 915

Good round-trip deal

C$ 645 or less
American Airlines
  • American Airlines
  • 17/10-26/10
  • 2 total stops
  • 18h 47m total
  • Ontario to Missouri
Search Deals
American Airlines
  • American Airlines
  • 16/9
  • 1 total stop
  • 12h 12m total
  • Ontario to Missouri
Search Deals
Highest demand for flights based on searches. 25% potential increase in price (C$ 511 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 15% potential price decrease (C$ 205 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2026
Search Deals
Price to beat on a round-trip flight from Ontario to Missouri.
Search Deals

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 2 August 2026.
Use the filters below to find and compare flights from Ontario to Missouri that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

TorontoKansas City

YYZ - MCI

YYZMCI

Toronto Pearson Intl

Tue 15/9

6:00 a.m.-9:51 a.m.

1 stop4h 51m

Kansas City

Wed 16/9

10:28 a.m.-6:09 p.m.

1 stop6h 41m

C$ 576

TorontoKansas City

YYZ - MCI

YYZMCI

Toronto Pearson Intl

Tue 18/8

7:45 a.m.-1:52 p.m.

1 stop7h 07m

Kansas City

Tue 25/8

2:58 p.m.-11:57 p.m.

1 stop7h 59m

C$ 576

MontrealKansas City

YUL - MCI

YULMCI

Montreal Pierre Elliott Trudeau Intl

Tue 1/9

2:20 p.m.-9:44 p.m.

2 stops8h 24m

Kansas City

Sat 5/9

7:30 a.m.-7:45 p.m.

2 stops11h 15m

C$ 579

MontrealKansas City

YUL - MCI

YULMCI

Montreal Pierre Elliott Trudeau Intl

Sat 3/10

6:00 a.m.-1:18 p.m.

1 stop8h 18m

Kansas City

Wed 7/10

4:23 p.m.-11:59 p.m.

1 stop6h 36m

C$ 579

MontrealKansas City

YUL - MCI

YULMCI

Montreal Pierre Elliott Trudeau Intl

Wed 26/8

7:00 a.m.-3:14 p.m.

1 stop9h 14m

Kansas City

Wed 2/9

10:38 a.m.-6:54 p.m.

1 stop7h 16m

C$ 579

MontrealKansas City

YUL - MCI

YULMCI

Montreal Pierre Elliott Trudeau Intl

Tue 1/9

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

1 stop5h 15m

Kansas City

Tue 8/9

7:32 a.m.-7:45 p.m.

2 stops11h 13m

C$ 588

TorontoKansas City

YYZ - MCI

YYZMCI

Toronto Pearson Intl

Wed 14/10

10:04 a.m.-5:34 p.m.

1 stop8h 30m

Kansas City

Mon 19/10

5:31 p.m.-11:59 p.m.

1 stop5h 28m

C$ 594

TorontoKansas City

YYZ - MCI

YYZMCI

Toronto Pearson Intl

Thu 17/9

6:15 a.m.-1:21 p.m.

1 stop8h 06m

Kansas City

Tue 22/9

10:27 a.m.-5:19 p.m.

1 stop5h 52m

C$ 595

MontrealKansas City

YUL - MCI

YULMCI

Montreal Pierre Elliott Trudeau Intl

Tue 12/1

3:00 p.m.-8:30 p.m.

1 stop6h 30m

Kansas City

Sat 16/1

11:30 a.m.-9:01 p.m.

1 stop8h 31m

C$ 601

MontrealKansas City

YUL - MCI

YULMCI

Montreal Pierre Elliott Trudeau Intl

Wed 2/9

6:10 a.m.-12:20 p.m.

1 stop7h 10m

Kansas City

Wed 9/9

6:00 a.m.-1:09 p.m.

1 stop6h 09m

C$ 601

Flights are sorted by cheapest round-trip flights first.

Deals found on 30/7

Showing 1-10 of 60 resultsSorted by cheapest first
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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$ 590). Flying from Region of Ontario to Missouri in July is currently the most expensive (average of C$ 1,342). 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 2 August 2026.

A simple way to save on the total cost of your ticket is to fly from Region of Ontario to Missouri at noon. If you’re flexible enough to do this you can expect to save up to 26% on your trip compared to booking a flight in the afternoon.

How much does it cost to fly round-trip from Region of Ontario to Missouri?

Airfare is below average for this route at the moment.
Region of Ontario to Missouri flights typically cost between C$ 590 and C$ 888 in October.
The cheapest round-trip price found within the last 5 days was C$ 439 on American Airlines (17 Oct-26 Oct).

How far ahead should I book a flight from Region of Ontario to Missouri?

Booking 71 days in advance of your planned departure date is, on average, the best time to get cheap flights from Region of Ontario to Missouri. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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 2 August 2026.
Get a feel of what it's like to fly with Delta,United Airlines, andWestJet from Ontario to Missouri by reading reviews from past customers. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.8
Good
8,497 reviews
Check prices

Overall

7.8

Boarding

8.1

Comfort

7.8

Crew

8.5

Food

7.2

Entertainment

7.8

Reviews

1 / 20
8.0
Excellent

Rakshith,May 2026

TPE - SEA

I got middle seat, but it was cheap $340 for Taipei to PDX ,
Delta
7.8
Good
8,497 reviews
Delta
7.8
Good
8,497 reviews
Check prices

Overall

7.8

Boarding

8.1

Comfort

7.8

Crew

8.5

Food

7.2

Entertainment

7.8

Reviews

1 / 20
8.0
Excellent

Rakshith,May 2026

TPE - SEA

I got middle seat, but it was cheap $340 for Taipei to PDX ,
United Airlines
7.4
Good
10,062 reviews
Delta
7.8
Good
8,497 reviews
Check prices

Overall

7.8

Boarding

8.1

Comfort

7.8

Crew

8.5

Food

7.2

Entertainment

7.8

Reviews

1 / 20
8.0
Excellent

Rakshith,May 2026

TPE - SEA

I got middle seat, but it was cheap $340 for Taipei to PDX ,
WestJet
7.2
Good
3,424 reviews
Delta
7.8
Good
8,497 reviews
Check prices

Overall

7.8

Boarding

8.1

Comfort

7.8

Crew

8.5

Food

7.2

Entertainment

7.8

Reviews

1 / 20
8.0
Excellent

Rakshith,May 2026

TPE - SEA

I got middle seat, but it was cheap $340 for Taipei to PDX ,
American Airlines
7.1
Good
11,845 reviews
Delta
7.8
Good
8,497 reviews
Check prices

Overall

7.8

Boarding

8.1

Comfort

7.8

Crew

8.5

Food

7.2

Entertainment

7.8

Reviews

1 / 20
8.0
Excellent

Rakshith,May 2026

TPE - SEA

I got middle seat, but it was cheap $340 for Taipei to PDX ,
Air Canada
7.1
Good
11,415 reviews
Delta
7.8
Good
8,497 reviews
Check prices

Overall

7.8

Boarding

8.1

Comfort

7.8

Crew

8.5

Food

7.2

Entertainment

7.8

Reviews

1 / 20
8.0
Excellent

Rakshith,May 2026

TPE - SEA

I got middle seat, but it was cheap $340 for Taipei to PDX ,

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.

  • How long is the flight from Region of Ontario to Missouri?

    Airlines like Delta, United Airlines, and American Airlines fly from Region of Ontario to Missouri in about 4h 51m. The time it takes to get you to your destination can typically vary by up to 4h 13m. The distance between Region of Ontario and Missouri is about 1345 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • 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$ 590). Flying from Region of Ontario to Missouri in July is currently the most expensive (average of C$ 1,342). 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.
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Pearson Intl to Newark flights
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Pearson Intl to Las Vegas flights
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Hamilton to Newark flights
Pearson Intl to Miami flights
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Pierre Elliott Trudeau Intl to John F Kennedy Intl flights
Pearson Intl to Reagan-National flights
Pearson Intl to O'Hare Intl flights
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Pearson Intl to Hobby flights
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Pearson Intl to Dulles Intl flights
Toronto Island to Orlando flights
Pierre Elliott Trudeau Intl to Los Angeles flights
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Abbotsford to Los Angeles flights
Vancouver Intl to O'Hare Intl flights
Pearson Intl to Atlanta flights
Pearson Intl to George Bush Intcntl flights
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Pearson Intl to Boston flights
Toronto Island to O'Hare Intl flights
Calgary to Newark flights
Toronto Island to Midway flights
Pearson Intl to Midway flights
Vancouver Intl to San Diego 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 2 August 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapestC$ 343AverageC$ 721FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
American AirlinesCheapestC$ 370AverageC$ 760FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Air CanadaCheapestC$ 412AverageC$ 673FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
DeltaCheapestC$ 614AverageC$ 732FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
WestJetCheapestC$ 630AverageC$ 901FlexibilityNo 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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