C$ 251+ Cheap Flights from Ontario to Missouri | Cheapflights

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Cheap flight deals from Ontario to Missouri

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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 17 September 2026.

Thu 1/107:00 a.m. -

1 stop26h 46m

Mon 5/109:16 a.m. -

1 stop10h 39m

Deal found 15/9C$ 517

Thu 29/109:35 a.m. -

2 stops33h 05m

Thu 5/114:26 p.m. -

1 stop20h 14m

Deal found 14/9C$ 519

Sun 18/104:45 p.m. -

2 stops21h 36m

Sat 24/104:30 p.m. -

1 stop20h 10m

Deal found 15/9C$ 524

Thu 22/107:45 a.m. -

1 stop16h 28m

Mon 26/104:30 p.m. -

1 stop20h 40m

Deal found 13/9C$ 527

Sun 22/119:15 a.m. -

2 stops33h 25m

Wed 2/126:05 p.m. -

1 stop18h 35m

Deal found 16/9C$ 584

Thu 29/107:35 a.m. -

1 stop27h 31m

Thu 5/111:37 p.m. -

1 stop16h 13m

Deal found 14/9C$ 597

Tue 20/1011:09 a.m. -

1 stop10h 23m

Tue 27/107:03 a.m. -

1 stop8h 44m

Deal found 15/9C$ 601

Wed 7/1011:09 a.m. -

1 stop10h 23m

Wed 14/107:03 a.m. -

1 stop8h 44m

Deal found 14/9C$ 608

Wed 14/103:14 p.m. -

1 stop10h 14m

Wed 21/107:16 a.m. -

1 stop9h 28m

Deal found 15/9C$ 609

Tue 6/107:29 a.m. -

1 stop10h 48m

Wed 14/107:16 a.m. -

1 stop9h 28m

Deal found 14/9C$ 614

Sat 17/1011:39 a.m. -

1 stop10h 34m

Sat 31/107:03 a.m. -

1 stop8h 44m

Deal found 15/9C$ 614

Mon 12/109:50 a.m. -

1 stop14h 23m

Thu 15/104:30 p.m. -

1 stop23h 10m

Deal found 13/9C$ 615

Best flights from Ontario to Missouri
Discover carefully curated flight deals from Ontario to Missouri that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 17 September 2026.

Thu 26/117:15 a.m. -

1 stop17h 44m

Sun 29/115:59 p.m. -

1 stop18h 41m

Deal found 11/9C$ 618

Tue 2/27:00 a.m. -

1 stop7h 25m

Wed 3/22:30 p.m. -

1 stop8h 21m

Deal found 15/9C$ 637

Sat 31/106:25 p.m. -

1 stop17h 23m

Sat 7/116:26 p.m. -

1 stop17h 06m

Deal found 16/9C$ 699

Wed 14/104:55 p.m. -

1 stop6h 05m

Sat 24/106:00 a.m. -

2 stops9h 10m

Deal found 16/9C$ 718

Thu 29/1010:05 a.m. -

1 stop6h 18m

Thu 1/71:25 p.m. -

1 stop5h 20m

Deal found 13/9C$ 725

Sun 15/116:00 a.m. -

1 stop8h 28m

Sat 21/1112:35 p.m. -

1 stop9h 55m

Deal found 15/9C$ 664

Sat 17/1011:23 a.m. -

1 stop13h 36m

Tue 20/106:00 a.m. -

1 stop10h 30m

Deal found 16/9C$ 720

Fri 30/109:10 a.m. -

1 stop7h 13m

Fri 6/114:05 p.m. -

1 stop4h 45m

Deal found 15/9C$ 741

Sat 24/108:50 a.m. -

1 stop6h 26m

Mon 26/104:05 p.m. -

Nonstop1h 54m

Deal found 12/9C$ 756

Sat 7/116:33 p.m. -

1 stop6h 23m

Sat 14/112:45 p.m. -

1 stop6h 12m

Deal found 16/9C$ 714

Fri 16/102:50 p.m. -

1 stop4h 51m

Mon 26/104:05 p.m. -

1 stop6h 50m

Deal found 13/9C$ 742

Tue 2/22:20 p.m. -

1 stop6h 12m

Wed 3/26:00 a.m. -

2 stops12h 38m

Deal found 12/9C$ 742

Thu 29/102:57 p.m. -

1 stop7h 55m

Tue 3/114:05 p.m. -

Nonstop2h 00m

Deal found 12/9C$ 763

Thu 5/113:57 p.m. -

1 stop7h 45m

Sun 8/117:15 a.m. -

1 stop6h 57m

Deal found 16/9C$ 849

Sun 8/1111:38 a.m. -

1 stop9h 37m

Tue 10/115:31 p.m. -

1 stop5h 26m

Deal found 16/9C$ 738

Tue 27/107:00 a.m. -

2 stops10h 34m

Tue 3/1111:27 a.m. -

2 stops9h 15m

Deal found 12/9C$ 743

Sat 31/102:45 p.m. -

1 stop5h 45m

Mon 2/114:05 p.m. -

Nonstop1h 54m

Deal found 13/9C$ 763

Fri 16/104:55 p.m. -

Nonstop2h 46m

Wed 21/1012:10 p.m. -

Nonstop2h 31m

Deal found 15/9C$ 781

Tue 13/106:00 a.m. -

1 stop4h 49m

Tue 20/105:31 p.m. -

1 stop14h 01m

Deal found 15/9C$ 738

Tue 13/107:00 a.m. -

1 stop6h 13m

Sat 17/1010:27 a.m. -

2 stops7h 35m

Deal found 13/9C$ 756

Tue 17/119:40 a.m. -

2 stops11h 49m

Sun 22/112:21 p.m. -

1 stop8h 06m

Deal found 15/9C$ 738

Sat 10/103:00 p.m. -

2 stops8h 58m

Mon 12/103:11 p.m. -

1 stop7h 48m

Deal found 13/9C$ 756

Wed 30/96:00 a.m. -

1 stop4h 51m

Fri 2/102:10 p.m. -

1 stop7h 49m

Deal found 11/9C$ 739

Sun 18/108:50 a.m. -

1 stop6h 27m

Sun 25/103:15 p.m. -

1 stop5h 00m

Deal found 13/9C$ 756

Sat 7/116:10 a.m. -

1 stop8h 14m

Mon 9/115:31 p.m. -

1 stop5h 26m

Deal found 13/9C$ 739

Sat 3/107:00 a.m. -

1 stop6h 14m

Sun 4/106:00 a.m. -

2 stops7h 19m

Deal found 13/9C$ 756

Thu 8/107:00 a.m. -

1 stop10h 26m

Wed 14/1012:35 p.m. -

1 stop10h 19m

Deal found 13/9C$ 752

Wed 7/1010:15 a.m. -

1 stop6h 28m

Wed 14/101:29 p.m. -

1 stop6h 15m

Deal found 12/9C$ 757

Thu 29/1010:30 a.m. -

2 stops8h 39m

Tue 3/116:50 p.m. -

1 stop4h 09m

Deal found 12/9C$ 757

Thu 1/106:15 a.m. -

1 stop5h 59m

Sun 4/106:20 a.m. -

1 stop4h 15m

Deal found 12/9C$ 763

Find flight deals from Ontario to Missouri

Round-trip from	C$ 517
One-way from	C$ 251
Good round-trip deal	C$ 647 or less

1/10-5/10

1/10-5/10
2 total stops
37h 25m total
Ontario to Missouri

6/10-31/12

6/10-31/12
2 total stops
28h 40m total
Ontario to Missouri

Price to beat on a round-trip flight from Ontario to Missouri.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

TorontoSt. Louis

YYZ Toronto Pearson Intl - STL Lambert-St Louis

YYZSTL

Toronto Pearson Intl

Tue 6/10

9:30 a.m.-1:10 p.m.

2 stops28h 40m

Lambert-St Louis

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 251

TorontoKansas City

YYZ Toronto Pearson Intl - MCI Kansas City

YYZMCI

Toronto Pearson Intl

Sun 25/10

7:00 a.m.-8:26 a.m.

1 stop26h 26m

Kansas City

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 262

TorontoSt. Louis

YYZ Toronto Pearson Intl - STL Lambert-St Louis

YYZSTL

Toronto Pearson Intl

Sun 27/9

4:45 p.m.-1:31 p.m.

2 stops21h 46m

Lambert-St Louis

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 322

OttawaSt. Louis

YOW Ottawa - STL Lambert-St Louis

YOWSTL

Ottawa

Thu 29/10

7:00 a.m.-5:40 p.m.

3 stops35h 40m

Lambert-St Louis

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 354

OttawaSt. Louis

YOW Ottawa - STL Lambert-St Louis

YOWSTL

Ottawa

Mon 2/11

5:30 a.m.-1:21 p.m.

3 stops32h 51m

Lambert-St Louis

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 368

MontrealSt. Louis

YUL Montreal Pierre Elliott Trudeau Intl - STL Lambert-St Louis

YULSTL

Montreal Pierre Elliott Trudeau Intl

Fri 30/10

7:50 p.m.-4:59 p.m.

1 stop22h 09m

Lambert-St Louis

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 382

MontrealKansas City

YUL Montreal Pierre Elliott Trudeau Intl - MCI Kansas City

YULMCI

Montreal Pierre Elliott Trudeau Intl

Sat 24/10

7:20 p.m.-8:26 a.m.

2 stops38h 06m

Kansas City

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 388

MontrealSt. Louis

YUL Montreal Pierre Elliott Trudeau Intl - STL Lambert-St Louis

YULSTL

Montreal Pierre Elliott Trudeau Intl

Wed 9/12

6:00 a.m.-8:26 p.m.

2 stops15h 26m

Lambert-St Louis

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 389

TorontoKansas City

YYZ Toronto Pearson Intl - MCI Kansas City

YYZMCI

Toronto Pearson Intl

Fri 30/10

3:14 p.m.-12:28 a.m.

1 stop10h 14m

Kansas City

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 393

TorontoColumbia

YYZ Toronto Pearson Intl - COU Columbia Regional

YYZCOU

Toronto Pearson Intl

Thu 15/10

7:00 a.m.-12:14 p.m.

3 stops30h 14m

Columbia Regional

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 396

Flights are sorted by cheapest round-trip flights first.

Deals found on 15/9

Showing 1-10 of 60 resultsSorted by cheapest first

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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.

YYZ-STL

YUL-STL

YYZ-MCI

YOW-STL

YUL-MCI

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

CAON-USMO

YYZ-STL

YUL-STL

YYZ-MCI

YOW-STL

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$ 587). Flying from Region of Ontario to Missouri in July is currently the most expensive (average of C$ 1,336). 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?

A simple way to save on the total cost of your ticket is to fly from Region of Ontario to Missouri in the afternoon. If you’re flexible enough to do this you can expect to save up to 36% on your trip compared to booking a flight in the evening.

Weekly flight availability from Region of Ontario to Missouri

The most flights from CAON to USMO are scheduled on a Monday (4 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (4 on average).

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$ 747 and C$ 966 in October.
The cheapest round-trip price found within the last 5 days was C$ 519 on Multiple Airlines (29 Oct-5 Nov).

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

Booking 72 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 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.

7.8

Good

Reviews

1 / 20

4.0

Okay

Jennifer,Sep 2026

ORD - LGA

The flight crew was 30 minutes late to an am flight and then that caused a delay

7.8

Good

7.8

Good

Reviews

1 / 20

4.0

Okay

Jennifer,Sep 2026

ORD - LGA

The flight crew was 30 minutes late to an am flight and then that caused a delay

United Airlines

7.4

Good

7.8

Good

Reviews

1 / 20

4.0

Okay

Jennifer,Sep 2026

ORD - LGA

The flight crew was 30 minutes late to an am flight and then that caused a delay

7.2

Good

7.8

Good

Reviews

1 / 20

4.0

Okay

Jennifer,Sep 2026

ORD - LGA

The flight crew was 30 minutes late to an am flight and then that caused a delay

American Airlines

7.1

Good

7.8

Good

Reviews

1 / 20

4.0

Okay

Jennifer,Sep 2026

ORD - LGA

The flight crew was 30 minutes late to an am flight and then that caused a delay

7.1

Good

7.8

Good

Reviews

1 / 20

4.0

Okay

Jennifer,Sep 2026

ORD - LGA

The flight crew was 30 minutes late to an am flight and then that caused a delay

Related info for your journey

How long is the flight from Region of Ontario to Missouri?
Airlines like Delta, American Airlines, and United Airlines fly from Region of Ontario to Missouri in about 6h 05m. The time it takes to get you to your destination can typically vary by up to 11h 18m. The distance between Region of Ontario and Missouri is about 1846 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$ 587). Flying from Region of Ontario to Missouri in July is currently the most expensive (average of C$ 1,336). 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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Top destinations

Alternative routes for Ontario to Missouri

Toronto Island to Newark flights

Pearson Intl to Newark flights

Pierre Elliott Trudeau Intl to Fort Lauderdale flights

Pearson Intl to LaGuardia flights

Toronto Island to LaGuardia flights

Pierre Elliott Trudeau Intl to LaGuardia flights

Vancouver Intl to Los Angeles flights

Pearson Intl to John F Kennedy Intl flights

Pearson Intl to Fort Lauderdale flights

Pierre Elliott Trudeau Intl to Miami flights

Pearson Intl to Las Vegas flights

Pierre Elliott Trudeau Intl to Newark flights

Toronto Island to John F Kennedy Intl flights

Pearson Intl to Orlando flights

Pierre Elliott Trudeau Intl to John F Kennedy Intl flights

Vancouver Intl to John F Kennedy Intl flights

Pearson Intl to Miami flights

Vancouver Intl to Newark flights

Pearson Intl to Dallas/Fort Worth flights

Pearson Intl to Los Angeles flights

Vancouver Intl to Las Vegas flights

Vancouver Intl to San Francisco flights

Hamilton to Newark flights

Pearson Intl to Hobby flights

Pierre Elliott Trudeau Intl to Los Angeles flights

Toronto Island to Fort Lauderdale flights

Pearson Intl to Dulles Intl flights

Vancouver Intl to Honolulu flights

Toronto Island to Orlando flights

Pearson Intl to San Francisco flights

Pearson Intl to Reagan-National flights

Pearson Intl to Seattle flights

Pierre Elliott Trudeau Intl to O'Hare Intl flights

Pierre Elliott Trudeau Intl to Orlando flights

Pearson Intl to George Bush Intcntl flights

Pierre Elliott Trudeau Intl to Dallas/Fort Worth flights

Pearson Intl to O'Hare Intl flights

Vancouver Intl to LaGuardia flights

Toronto Island to Boston flights

Vancouver Intl to Ontario flights

Pearson Intl to Sky Harbor Intl flights

Hamilton to Fort Lauderdale flights

Vancouver Intl to Seattle flights

Pearson Intl to Tampa flights

Pierre Elliott Trudeau Intl to Las Vegas flights

Vancouver Intl to San Diego flights

Pierre Elliott Trudeau Intl to Boston flights

Vancouver Intl to Palm Springs flights

Calgary to Las Vegas flights

Pearson Intl to Nashville flights

Top 5 airlines flying from Ontario to Missouri

Airline	Cheapest	Average	Flexibility	On-time
Air Canada	CheapestC$ 335	AverageC$ 653	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
United Airlines	CheapestC$ 341	AverageC$ 719	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Delta	CheapestC$ 581	AverageC$ 778	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights
WestJet	CheapestC$ 625	AverageC$ 839	FlexibilityNo cancel fee	On-time60%	Search WestJet flights
American Airlines	CheapestC$ 633	AverageC$ 760	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights

Fly with Cheapflights

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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