Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from Missouri to Ontario from C$ 195

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 13/9. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YYZ
6 ago. — 13 ago.1
1 adult

Cheap flight deals from Missouri to Ontario

Keep the following information in mind while searching for Missouri to Ontario flight deals. Data was last updated 1 agosto 2025.

Round-trip from

C$ 441

One-way from

C$ 195

Popular in

January

Cheapest in

September

Average price

C$ 743

Good round-trip deal

C$ 235 or less

Good one-way deal

C$ 613 or less
3/9-10/9
  • 3/9-10/9
  • 2 total stops
  • 23h 53m total
  • Missouri to Ontario
Search Deals
13/9
  • 13/9
  • 1 total stop
  • 17h 26m total
  • Missouri to Ontario
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (C$ 58 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 24 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2025
Search Deals
Price to beat on a round-trip flight from Missouri to Ontario.
Search Deals
Price to beat on a one-way flight from Missouri to Ontario.
Search Deals

Find flight deals from Missouri to Ontario

Cheapest flights from Missouri to Ontario
Explore the most affordable flight options available from Missouri to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 1 agosto 2025.

mié. 3/96:00 a.m.MCI - YYZ
1 stop9h 36mMultiple Airlines
mié. 10/99:50 a.m.YYZ - MCI
1 stop14h 17mMultiple Airlines
Deal found 31/7C$ 441
sáb. 13/95:15 a.m.MCI - YUL
1 stop8h 05mMultiple Airlines
sáb. 20/96:45 a.m.YUL - MCI
2 stops17h 22mMultiple Airlines
Deal found 30/7C$ 464
mar. 2/98:01 p.m.STL - YYZ
1 stop15h 31mAmerican Airlines
mié. 10/93:11 p.m.YYZ - STL
1 stop7h 42mAmerican Airlines
Deal found 30/7C$ 477
mié. 10/96:10 a.m.STL - YUL
1 stop9h 23mAmerican Airlines
lun. 15/95:15 p.m.YUL - STL
1 stop17h 11mAmerican Airlines
Deal found 30/7C$ 482
jue. 4/912:05 p.m.STL - YYZ
2 stops22h 30mMultiple Airlines
sáb. 6/97:00 a.m.YYZ - STL
3 stops28h 50mMultiple Airlines
Deal found 29/7C$ 491
mar. 30/95:15 a.m.MCI - YOW
1 stop10h 42mMultiple Airlines
sáb. 18/104:25 p.m.YOW - MCI
1 stop8h 25mMultiple Airlines
Deal found 31/7C$ 524
mar. 21/107:49 p.m.MCI - YYZ
1 stop15h 46mAmerican Airlines
mié. 29/1011:45 a.m.YYZ - MCI
1 stop10h 07mAmerican Airlines
Deal found 29/7C$ 596
sáb. 11/106:00 a.m.MCI - YUL
1 stop9h 39mAmerican Airlines
sáb. 18/1012:30 p.m.YUL - MCI
1 stop9h 41mAmerican Airlines
Deal found 30/7C$ 601
jue. 4/94:05 p.m.STL - YYZ
Nonstop1h 55mAir Canada
dom. 7/96:35 p.m.YYZ - STL
Nonstop2h 03mAir Canada
Deal found 29/7C$ 605
mié. 3/93:20 p.m.STL - YYZ
1 stop7h 38mUnited Airlines
mié. 10/99:00 a.m.YYZ - STL
1 stop7h 44mUnited Airlines
Deal found 30/7C$ 612
sáb. 13/95:50 a.m.SGF - YYZ
1 stop10h 53mAmerican Airlines
sáb. 20/911:44 a.m.YYZ - SGF
1 stop10h 20mAmerican Airlines
Deal found 30/7C$ 613
mié. 3/99:16 a.m.STL - YYZ
1 stop10h 27mDelta
jue. 11/96:44 p.m.YYZ - STL
1 stop14h 12mDelta
Deal found 30/7C$ 645

Cheapflights Fare Finder

 
Customize your flight search to find flights from Missouri to Ontario 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 agosto 2025.
Use the filters below to find and compare flights from Missouri to Ontario that are best for you.

Fly from

Missouri

Fly to

Ontario

Route

Depart

Return

Price

Kansas CityToronto

MCI - YYZ

MCIYYZ

Kansas City

mié. 3/9

6:00 a.m.-4:36 p.m.

1 stop9h 36m

Toronto Pearson Intl

mié. 10/9

9:50 a.m.-11:07 p.m.

1 stop14h 17m

C$ 441

Kansas CityMontreal

MCI - YUL

MCIYUL

Kansas City

sáb. 13/9

5:15 a.m.-2:20 p.m.

1 stop8h 05m

Montreal Pierre Elliott Trudeau Intl

sáb. 20/9

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

2 stops17h 22m

C$ 464

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

mar. 2/9

8:01 p.m.-12:32 p.m.

1 stop15h 31m

Toronto Pearson Intl

mié. 10/9

3:11 p.m.-9:53 p.m.

1 stop7h 42m

C$ 477

St. LouisMontreal

STL - YUL

STLYUL

Lambert-St Louis

mié. 10/9

6:10 a.m.-4:33 p.m.

1 stop9h 23m

Montreal Pierre Elliott Trudeau Intl

lun. 15/9

5:15 p.m.-9:26 a.m.

1 stop17h 11m

C$ 482

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

jue. 4/9

12:05 p.m.-11:35 a.m.

2 stops22h 30m

Toronto Pearson Intl

sáb. 6/9

7:00 a.m.-10:50 a.m.

3 stops28h 50m

C$ 491

Kansas CityOttawa

MCI - YOW

MCIYOW

Kansas City

mar. 30/9

5:15 a.m.-4:57 p.m.

1 stop10h 42m

Ottawa

sáb. 18/10

4:25 p.m.-11:50 p.m.

1 stop8h 25m

C$ 524

Kansas CityToronto

MCI - YYZ

MCIYYZ

Kansas City

mar. 21/10

7:49 p.m.-12:35 p.m.

1 stop15h 46m

Toronto Pearson Intl

mié. 29/10

11:45 a.m.-8:52 p.m.

1 stop10h 07m

C$ 596

Kansas CityMontreal

MCI - YUL

MCIYUL

Kansas City

sáb. 11/10

6:00 a.m.-4:39 p.m.

1 stop9h 39m

Montreal Pierre Elliott Trudeau Intl

sáb. 18/10

12:30 p.m.-9:11 p.m.

1 stop9h 41m

C$ 601

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

jue. 4/9

4:05 p.m.-7:00 p.m.

Nonstop1h 55m

Toronto Pearson Intl

dom. 7/9

6:35 p.m.-7:38 p.m.

Nonstop2h 03m

C$ 605

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

mié. 3/9

3:20 p.m.-11:58 p.m.

1 stop7h 38m

Toronto Pearson Intl

mié. 10/9

9:00 a.m.-3:44 p.m.

1 stop7h 44m

C$ 612

Flights are sorted by cheapest round-trip flights first.

Deals found on 29/7

Showing 1-10 of 44 results
1
2
3
...
5

Best time to book a flight from Missouri to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Missouri 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 Missouri to Ontario

What is the cheapest month to book a flight from Missouri to Region of Ontario?

Currently, January is the cheapest month in which you can book a flight from Missouri to Region of Ontario (average of C$ 167). Flying from Missouri to Region of Ontario in July is currently the most expensive (average of C$ 258). 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 MO to ON?

Find hourly flight availability from Missouri to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 1 agosto 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Missouri to Region of Ontario as you normally would.

Weekly flight availability from Missouri to Region of Ontario

Explore weekly flight availability from Missouri to Ontario. 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 1 agosto 2025.

The most flights from USMO to CAON 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).

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated 1 agosto 2025.
Read reviews from past customers who have flown Alaska Airlines,Delta, andUnited Airlines from Missouri to Ontario. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Entertainment

7.1

Comfort

7.8

Boarding

8.1

Food

7.1

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Entertainment

7.1

Comfort

7.8

Boarding

8.1

Food

7.1

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Delta
8.0
Very good
7,981 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Entertainment

7.1

Comfort

7.8

Boarding

8.1

Food

7.1

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
United Airlines
7.4
Good
8,900 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Entertainment

7.1

Comfort

7.8

Boarding

8.1

Food

7.1

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Entertainment

7.1

Comfort

7.8

Boarding

8.1

Food

7.1

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Air Canada
7.1
Good
9,851 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Entertainment

7.1

Comfort

7.8

Boarding

8.1

Food

7.1

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

Related info for your journey

Find useful and relevant information for your journey from Missouri to Ontario. 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 Missouri to Region of Ontario one-way?

    The cheapest airlines for a one-way flight from Missouri to Region of Ontario are American Airlines (C$ 198), Delta (C$ 298), and United Airlines (C$ 331).

  • Can I find deals for flights from Missouri to Ontario that include hotel bookings?

    Yes. In addition to deals on Missouri to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Missouri to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Missouri to Ontario.

  • Can I find deals for business class flights from Missouri to Ontario?

    Yes. Cheapflights offers flight deals from Missouri to Ontario 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 Missouri to Region of Ontario?

    Currently, January is the cheapest month in which you can book a flight from Missouri to Region of Ontario (average of C$ 167). Flying from Missouri to Region of Ontario in July is currently the most expensive (average of C$ 258). 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 Missouri to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
Newark to Toronto Island flights
Newark to Pearson Intl flights
John F Kennedy Intl to Pearson Intl flights
San Francisco to Vancouver Intl flights
Newark to Pierre Elliott Trudeau Intl flights
LaGuardia to Pearson Intl flights
John F Kennedy Intl to Vancouver Intl flights
LaGuardia to Pierre Elliott Trudeau Intl flights
Los Angeles to Vancouver Intl flights
Boston to Pearson Intl flights
Newark to Vancouver Intl flights
O'Hare Intl to Pearson Intl flights
John F Kennedy Intl to Pierre Elliott Trudeau Intl flights
Newark to Calgary flights
Los Angeles to Pearson Intl flights
Dulles Intl to Pearson Intl flights
Boston to Toronto Island flights
San Francisco to Pearson Intl flights
John F Kennedy Intl to Calgary flights
Reagan-National to Pearson Intl flights
Dallas/Fort Worth to Pearson Intl flights
Denver to Vancouver Intl flights
San Francisco to Calgary flights
Hobby to Pearson Intl flights
Dulles Intl to Toronto Island flights
Dulles Intl to Pierre Elliott Trudeau Intl flights
Fort Lauderdale to Pearson Intl flights
Seattle to Pearson Intl flights
Atlanta to Pearson Intl flights
Los Angeles to Calgary flights
O'Hare Intl to Vancouver Intl flights
Reagan-National to Pierre Elliott Trudeau Intl flights
Los Angeles to Pierre Elliott Trudeau Intl flights
San Diego to Vancouver Intl flights
George Bush Intcntl to Pearson Intl flights
San Francisco to Pierre Elliott Trudeau Intl flights
O'Hare Intl to Pierre Elliott Trudeau Intl flights
LaGuardia to Vancouver Intl flights
San Francisco to Abbotsford flights
Dulles Intl to Vancouver Intl flights
Midway to Toronto Island flights
LaGuardia to Calgary flights
Hobby to Vancouver Intl flights
Santa Ana to Vancouver Intl flights
O'Hare Intl to Calgary flights
Boston to Pierre Elliott Trudeau Intl flights
Ontario to Vancouver Intl flights
Newark to Québec City flights
Baltimore to Pearson Intl flights
Boston to Vancouver Intl flights

Top airline flying from Missouri to Ontario

Discover the top airline that operate flights from Missouri to Ontario. 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 agosto 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 302AverageC$ 692FlexibilityNo cancel feeOn-time67%
Search Air Canada 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 Missouri to Ontario?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Missouri to Ontario. 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 Missouri to Ontario?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Ontario from Missouri.

Can Cheapflights find flights from Missouri to Ontario with no change fees?

Certainly. Search results for flights to Ontario from Missouri shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Missouri to Ontario become cheaper?

Yes! Start tracking prices for Missouri to Ontario flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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.