HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$158+ Cheap flights from Kansas City (MCI) to Ontario

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 10/31. Fares are subject to change and may not be available on all flights or dates of travel.
MCI — YYZ
Nov 18 — Nov 251
Tue 11/18
Tue 11/25
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Kansas City to Ontario with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Find flight deals from Kansas City to Ontario

Cheapest flights from Kansas City to Ontario
Explore the most affordable flight options available from Kansas City to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 19, 2025.

This Kiwi.com deal was found by Cheapflights users on 10/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/16:00 amMCI - YYZ
1 stop17h 11mMultiple Airlines
Wed 12/35:15 pmYYZ - MCI
1 stop30h 51mMultiple Airlines
Deal found 10/17$309
This Kiwi.com deal was found by Cheapflights users on 10/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/26:00 amMCI - YYZ
1 stop10h 53mMultiple Airlines
Wed 12/35:15 pmYYZ - MCI
1 stop30h 51mMultiple Airlines
Deal found 10/17$315
This Kiwi.com deal was found by Cheapflights users on 10/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/16:00 amMCI - YUL
2 stops15h 20mMultiple Airlines
Mon 12/88:00 amYUL - MCI
1 stop10h 46mMultiple Airlines
Deal found 10/17$330
This Kiwi.com deal was found by Cheapflights users on 10/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/2710:26 amMCI - YYZ
2 stops26h 39mMultiple Airlines
Mon 12/15:15 pmYYZ - MCI
1 stop19h 48mMultiple Airlines
Deal found 10/16$339
This Kiwi.com deal was found by Cheapflights users on 10/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/141:23 pmMCI - YYZ
1 stop29h 32mMultiple Airlines
Tue 11/187:15 amYYZ - MCI
1 stop30h 13mMultiple Airlines
Deal found 10/17$346
This Kiwi.com deal was found by Cheapflights users on 10/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/106:00 amMCI - YYZ
1 stop17h 25mMultiple Airlines
Fri 11/147:55 pmYYZ - MCI
1 stop27h 06mMultiple Airlines
Deal found 10/17$365
This Kiwi.com deal was found by Cheapflights users on 10/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/86:00 amMCI - YYZ
2 stops13h 08mMultiple Airlines
Tue 11/115:15 pmYYZ - MCI
1 stop20h 13mMultiple Airlines
Deal found 10/17$367
This Kiwi.com deal was found by Cheapflights users on 10/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/168:28 pmMCI - YYZ
2 stops23h 39mMultiple Airlines
Sun 11/238:00 pmYYZ - MCI
1 stop17h 03mMultiple Airlines
Deal found 10/17$381
This Kiwi.com deal was found by Cheapflights users on 10/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/37:31 pmMCI - YUL
1 stop19h 52mMultiple Airlines
Wed 12/105:10 pmYUL - MCI
2 stops30h 56mMultiple Airlines
Deal found 10/18$387
This Mytrip deal was found by Cheapflights users on 10/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/166:00 amMCI - YUL
1 stop17h 30mMultiple Airlines
Sun 11/234:35 pmYUL - MCI
2 stops27h 01mMultiple Airlines
Deal found 10/17$424
This Mytrip deal was found by Cheapflights users on 10/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/141:23 pmMCI - YTZ
3 stops26h 20mMultiple Airlines
Tue 11/187:40 pmYTZ - MCI
2 stops17h 48mMultiple Airlines
Deal found 10/17$451
This Kiwi.com deal was found by Cheapflights users on 10/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1311:12 amMCI - YUL
2 stops28h 13mMultiple Airlines
Mon 11/176:45 amYUL - MCI
1 stop12h 43mMultiple Airlines
Deal found 10/16$460

Cheap flight deals from Kansas City to Ontario

Keep the following information in mind while searching for Kansas City to Ontario flight deals. Data was last updated October 19, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$309
(Kiwi.com)

One-way from

$158
(Mytrip)

Popular in

October

Cheapest in

February

Average price

$835
Provider with most accurate pricing for Kansas City-Toronto (YTO) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Kansas City-Toronto (YTO) flights.
Search Deals
From Kansas City to Ontario
Search Deals
One-way flight from Kansas City to Ontario
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($42 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Kansas City 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 2,558,603 searches. Data last updated October 19, 2025.
Use the filters below to find and compare flights from Kansas City to Ontario that are best for you.

Fly from

Kansas City

Fly to

Ontario

Route

Depart

Return

Price

Kansas CityMontreal

MCI - YUL

MCIYUL

Kansas City

Mon 12/1

6:00 am-10:20 pm

2 stops15h 20m

Montreal Pierre Elliott Trudeau Intl

Mon 12/8

8:00 am-5:46 pm

1 stop10h 46m

$330

Kansas CityToronto

MCI - YYZ

MCIYYZ

Kansas City

Fri 11/14

1:23 pm-7:55 pm

1 stop29h 32m

Toronto Pearson Intl

Tue 11/18

7:15 am-12:28 pm

1 stop30h 13m

$346

Kansas CityToronto

MCI - YYZ

MCIYYZ

Kansas City

Thu 11/27

12:58 pm-7:55 pm

1 stop29h 57m

Toronto Pearson Intl

Mon 12/1

5:15 pm-12:03 pm

1 stop19h 48m

$362

Kansas CityToronto

MCI - YYZ

MCIYYZ

Kansas City

Tue 12/2

6:00 am-5:53 pm

1 stop10h 53m

Toronto Pearson Intl

Wed 12/3

9:35 am-10:07 am

2 stops25h 32m

$365

Kansas CityToronto

MCI - YYZ

MCIYYZ

Kansas City

Mon 11/10

6:00 am-12:25 am

1 stop17h 25m

Toronto Pearson Intl

Fri 11/14

7:55 pm-10:01 pm

1 stop27h 06m

$365

Kansas CityToronto

MCI - YYZ

MCIYYZ

Kansas City

Sat 11/8

6:00 am-12:11 am

1 stop17h 11m

Toronto Pearson Intl

Tue 11/11

5:15 pm-12:28 pm

1 stop20h 13m

$379

Kansas CityMontreal

MCI - YUL

MCIYUL

Kansas City

Wed 12/3

7:31 pm-4:23 pm

1 stop19h 52m

Montreal Pierre Elliott Trudeau Intl

Wed 12/10

5:10 pm-11:06 pm

2 stops30h 56m

$387

Kansas CityToronto

MCI - YYZ

MCIYYZ

Kansas City

Fri 2/20

12:13 pm-11:28 am

1 stop22h 15m

Toronto Pearson Intl

Sun 2/22

3:40 pm-11:08 am

1 stop20h 28m

$392

Kansas CityToronto

MCI - YYZ

MCIYYZ

Kansas City

Thu 11/27

12:58 pm-11:00 pm

1 stop9h 02m

Toronto Pearson Intl

Sun 11/30

12:30 pm-8:03 pm

2 stops32h 33m

$419

Kansas CityMontreal

MCI - YUL

MCIYUL

Kansas City

Sun 11/16

6:00 am-12:30 am

1 stop17h 30m

Montreal Pierre Elliott Trudeau Intl

Sun 11/23

4:35 pm-6:36 pm

2 stops27h 01m

$424

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/17

Showing 1-10 of 32 results
1
2
3
4

Best time to book a flight from Kansas City to Ontario

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

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

Currently, March is the cheapest month in which you can book a flight from Kansas City to Region of Ontario (average of $292). Flying from Kansas City to Region of Ontario in September is currently the most expensive (average of $729). 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.

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

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 October 19, 2025.
Read reviews from past customers who have flown Delta, United Airlines, and American Airlines from Kansas City to Ontario. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
7,975 reviews

Overall

7.9

Food

7.3

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Delta
7.9
Good
7,975 reviews
Delta
7.9
Good
7,975 reviews

Overall

7.9

Food

7.3

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
United Airlines
7.4
Good
8,989 reviews
Delta
7.9
Good
7,975 reviews

Overall

7.9

Food

7.3

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
American Airlines
7.2
Good
11,035 reviews
Delta
7.9
Good
7,975 reviews

Overall

7.9

Food

7.3

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
WestJet
7.2
Good
3,128 reviews
Delta
7.9
Good
7,975 reviews

Overall

7.9

Food

7.3

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Air Canada
7.1
Good
10,330 reviews
Delta
7.9
Good
7,975 reviews

Overall

7.9

Food

7.3

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.

Related info for your journey

Find useful and relevant information for your journey from Kansas City to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Kansas City to Ontario?

    Kansas City (MCI), located 17.4 mi from the city center, is the airport you fly out of when you book flights from Kansas City to Ontario.

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

    United Airlines and Air Canada can get you from Kansas City to Region of Ontario in just under 5h 09m. Your travel time can differ by up to 7h 09m. There are 1055 mi between Kansas City and Region of Ontario. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from Kansas City to Region of Ontario one-way?

    One-way options have recently been found by users for as low as $309 on Delta. Other airlines that offer cheap prices include American Airlines from $310 and WestJet from $414 one-way.

  • What are the most popular routes from Kansas City to Region of Ontario?

    Most travelers choose Kansas City - Toronto Pearson Intl, Kansas City - Montreal Pierre Elliott Trudeau Intl or Kansas City - Toronto Island when deciding on the best route from Kansas City to Region of Ontario.

  • What are the cheapest flights from Kansas City to Region of Ontario?

    On average you can expect to pay $984 for a flight from Kansas City to Region of Ontario. The cheapest flight overall is $556 while the most popular route, (Kansas City - Toronto Pearson Intl) is currently priced at $309.

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

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

  • How can I find direct flights from Kansas City to Ontario?

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

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

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

    Currently, March is the cheapest month in which you can book a flight from Kansas City to Region of Ontario (average of $292). Flying from Kansas City to Region of Ontario in September is currently the most expensive (average of $729). 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 Kansas City to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
St. Louis to Pearson Intl flights
Kansas City to Vancouver Intl flights
Kansas City to Pearson Intl flights
St. Louis to Pierre Elliott Trudeau Intl flights
St. Louis to Vancouver Intl flights
Kansas City to Pierre Elliott Trudeau Intl flights
St. Louis to Calgary flights
Kansas City to Calgary flights
St. Louis to Québec City flights
Kansas City to Québec City flights
St. Louis to Ottawa flights
Kansas City to Toronto Island flights
Kansas City to Kelowna flights
Springfield to Vancouver Intl flights
Kansas City to Ottawa flights
St. Louis to Edmonton flights
Springfield to Pearson Intl flights
Kansas City to Winnipeg flights
St. Louis to Halifax flights
St. Louis to Winnipeg flights
Kansas City to Saskatoon flights
Kansas City to Moncton flights
Springfield to Calgary flights
Kansas City to Halifax flights
St. Louis to Victoria flights
St. Louis to Kelowna flights
St. Louis to Saskatoon flights
Columbia to Pearson Intl flights
Springfield to Pierre Elliott Trudeau Intl flights
Kansas City to Victoria flights
Kansas City to Edmonton flights
Joplin to Pearson Intl flights
St. Louis to St. John's flights
Columbia to Pierre Elliott Trudeau Intl flights
Kansas City to St. John's flights
Joplin to Pierre Elliott Trudeau Intl flights
Springfield to Toronto Island flights
St. Louis to Grande Prairie flights
St. Louis to Sydney flights

Top 5 airlines flying from Kansas City to Ontario

Discover the top 5 airlines that operate flights from Kansas City 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 2,558,603 searches. Data last updated October 19, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$292Average$688FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$465Average$788FlexibilityNo cancel feeOn-time69%
WestJetCheapest$525Average$732FlexibilityNo cancel feeOn-time60%
American AirlinesCheapest$534Average$663FlexibilityNo cancel feeOn-time71%
DeltaCheapest$567Average$722FlexibilityNo cancel feeOn-timeN/A

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.