What’s the top layover airport for flights from Kansas City to Ontario?

Denver (DEN) – chosen by Cheapflights users on 75% of 1-stop itineraries from Kansas City to Ontario on Cheapflights.

Which airport typically offers the quickest layover for flights from Kansas City to Ontario?

Flights via Phoenix (PHX) offer the fastest connection on this route, with an average layover time of 1h 03m.

What’s the fastest layover option from Kansas City to Ontario?

Flights via Phoenix (PHX) have the shortest average one-way travel time for 1-stop routes: 4h 55m.

What’s the cheapest layover airport for flights from Kansas City to Ontario?

Denver (DEN) is the most affordable 1-stop option, with an average round-trip price of $228.

How long is the flight from Kansas City to Ontario?

Airlines like Frontier and Alaska Airlines fly from Kansas City to Ontario in about 26h 23m. The time it takes to get you to your destination can typically vary by up to 1h 04m. The distance from Kansas City to Ontario is about 1314 mi. Both multi-stop and nonstop flights can be found to your destination and back.

What are the cheapest airlines flying from Kansas City to Ontario round-trip?

Flying on Frontier is currently your cheapest option to Ontario, with prices starting at $75. Additional round-trip tickets that might be worth considering are offered by United Airlines and Southwest, with the lowest prices starting at $253 and $290, respectively. You may be able to fly from Kansas City to Ontario for 80% less than the average price by searching for these airlines.

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

One-way options have recently been found by users for as low as $67 on Frontier. Other airlines that offer cheap prices include American Airlines from $167 and Southwest from $168 one-way.

In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).

What are the most popular airlines that fly from Kansas City to Ontario?

When booking a flight from Kansas City to Ontario, you may want to consider flying on Southwest, American Airlines or Frontier as they are the most popular for this route.

Most accurate provider : When it comes to deals on Kansas City-Ontario flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Kansas City-Ontario flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Kansas City-Ontario flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on Kansas City-Ontario flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Kansas City-Ontario flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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.

$52+ Flights from Kansas City to Ontario

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Cheap 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 December 10, 2025.

Wed 12/248:45 pmMCI - ONT

1 stop5h 14mFrontier

Wed 12/316:45 amONT - MCI

1 stop11h 05mFrontier

Deal found 12/8

$247

Wed 12/318:45 pmMCI - ONT

1 stop5h 14mFrontier

Sun 1/46:45 amONT - MCI

1 stop11h 06mFrontier

Deal found 12/9

$268

Mon 12/228:45 pmMCI - ONT

1 stop5h 14mFrontier

Mon 1/56:45 amONT - MCI

1 stop11h 05mFrontier

Deal found 12/8

$284

Sun 12/218:45 pmMCI - ONT

1 stop5h 14mFrontier

Wed 12/316:45 amONT - MCI

1 stop11h 05mFrontier

Deal found 12/8

$292

Thu 12/118:09 pmMCI - ONT

1 stop20h 16mFrontier

Sat 12/133:20 pmONT - MCI

1 stop26h 30mFrontier

Deal found 12/8

$297

Wed 12/318:45 pmMCI - ONT

1 stop5h 14mFrontier

Sat 1/36:45 amONT - MCI

1 stop11h 06mFrontier

Deal found 12/8

$313

Fri 12/122:48 pmMCI - ONT

1 stop25h 37mFrontier

Sun 12/144:01 pmONT - MCI

1 stop25h 49mFrontier

Deal found 12/8

$353

Fri 12/198:45 pmMCI - ONT

1 stop5h 14mFrontier

Wed 12/316:45 amONT - MCI

1 stop11h 05mFrontier

Deal found 12/7

$364

Tue 12/166:30 amMCI - ONT

1 stop16h 47mMultiple Airlines

Fri 12/196:00 amONT - MCI

1 stop6h 52mMultiple Airlines

Deal found 12/8

$383

Best flights from Kansas City to Ontario
Discover carefully curated flight deals from Kansas City to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 10, 2025.

Mon 1/58:45 pmMCI - ONT

1 stop27h 27mFrontier

Fri 1/96:00 amONT - MCI

1 stop11h 46mFrontier

Deal found 12/7

$219

Wed 1/212:45 pmMCI - ONT

1 stop26h 23mAlaska Airlines

Sun 1/256:00 amONT - MCI

1 stop29h 50mAlaska Airlines

Deal found 12/10

$287

Thu 1/84:25 pmMCI - ONT

1 stop7h 33mUnited Airlines

Wed 1/141:24 pmONT - MCI

1 stop8h 06mUnited Airlines

Deal found 12/9

$317

Wed 2/47:00 amMCI - ONT

1 stop17h 44mDelta

Mon 2/96:00 amONT - MCI

1 stop5h 58mDelta

Deal found 12/9

$332

Wed 12/318:45 pmMCI - ONT

1 stop5h 14mFrontier

Sun 1/46:45 amONT - MCI

1 stop11h 06mFrontier

Deal found 12/9

$276

Wed 1/142:45 pmMCI - ONT

1 stop7h 51mAlaska Airlines

Tue 1/274:03 pmONT - MCI

1 stop19h 47mAlaska Airlines

Deal found 12/10

$287

Fri 1/94:25 pmMCI - ONT

1 stop7h 33mUnited Airlines

Tue 1/131:24 pmONT - MCI

1 stop5h 09mUnited Airlines

Deal found 12/10

$317

Wed 1/142:45 pmMCI - ONT

1 stop7h 51mAlaska Airlines

Wed 1/215:59 pmONT - MCI

1 stop19h 06mAlaska Airlines

Deal found 12/9

$299

Tue 2/37:00 amMCI - ONT

1 stop17h 44mDelta

Mon 2/91:10 pmONT - MCI

1 stop5h 29mDelta

Deal found 12/9

$332

Wed 1/219:05 amMCI - ONT

2 stops10h 38mUnited Airlines

Sun 1/255:05 amONT - MCI

1 stop5h 32mUnited Airlines

Deal found 12/10

$322

Tue 1/202:45 pmMCI - ONT

1 stop26h 23mAlaska Airlines

Tue 2/34:03 pmONT - MCI

1 stop19h 47mAlaska Airlines

Deal found 12/8

$306

Wed 1/149:05 amMCI - ONT

1 stop5h 42mUnited Airlines

Tue 1/275:05 amONT - MCI

2 stops12h 42mUnited Airlines

Deal found 12/10

$322

Last-minute flights from Kansas City to Ontario
Discover last-minute flight deals from Kansas City to Ontario. Data last updated December 10, 2025 and is based on user searches.

Mon 1/58:45 pmMCI - ONT

1 stop27h 27mFrontier

Mon 1/126:00 amONT - MCI

1 stop11h 41mFrontier

Deal found 12/8

$194

Mon 1/58:45 pmMCI - ONT

1 stop27h 27mFrontier

Fri 1/96:00 amONT - MCI

1 stop11h 46mFrontier

Deal found 12/7

$219

Thu 1/88:23 pmMCI - ONT

1 stop5h 33mFrontier

Mon 1/126:00 amONT - MCI

1 stop11h 41mFrontier

Deal found 12/10

$203

Thu 1/158:33 pmMCI - ONT

1 stop29h 26mMultiple Airlines

Tue 1/203:07 pmONT - MCI

1 stop6h 26mMultiple Airlines

Deal found 12/8

$205

Fri 1/168:27 pmMCI - ONT

1 stop28h 32mMultiple Airlines

Tue 1/203:07 pmONT - MCI

1 stop6h 26mMultiple Airlines

Deal found 12/8

$166

Sat 1/177:00 amMCI - ONT

1 stop14h 50mMultiple Airlines

Tue 1/203:07 pmONT - MCI

1 stop6h 26mMultiple Airlines

Deal found 12/8

$208

Mon 1/198:27 pmMCI - ONT

1 stop20h 40mFrontier

Mon 1/266:20 amONT - MCI

1 stop11h 31mFrontier

Deal found 12/9

$186

Fri 1/238:41 pmMCI - ONT

1 stop5h 39mFrontier

Mon 1/266:20 amONT - MCI

1 stop11h 31mFrontier

Deal found 12/9

$190

Tue 1/277:00 amMCI - ONT

1 stop8h 37mMultiple Airlines

Tue 2/33:07 pmONT - MCI

1 stop6h 26mMultiple Airlines

Deal found 12/8

$189

One-way flights from Kansas City to Ontario
Search for one-way flight options from Kansas City to Ontario. Find affordable one-way fares based on user searches. Data last updated December 10, 2025.

Wed 3/45:46 pmMCI - ONT

1 stop6h 53mFrontier

Deal found 12/7

$52

Fri 2/68:41 pmMCI - ONT

1 stop28h 43mFrontier

Deal found 12/7

$61

Wed 2/185:46 pmMCI - ONT

1 stop6h 53mFrontier

Deal found 12/10

$62

Mon 2/28:41 pmMCI - ONT

1 stop5h 39mFrontier

Deal found 12/7

$63

Mon 1/268:41 pmMCI - ONT

1 stop5h 39mFrontier

Deal found 12/10

$64

Mon 2/98:41 pmMCI - ONT

1 stop5h 39mFrontier

Deal found 12/7

$65

Wed 2/255:46 pmMCI - ONT

1 stop6h 53mFrontier

Deal found 12/9

$67

Fri 1/168:27 pmMCI - ONT

1 stop28h 32mFrontier

Deal found 12/8

$72

Mon 2/238:46 pmMCI - ONT

1 stop27h 53mFrontier

Deal found 12/8

$74

Wed 2/115:46 pmMCI - ONT

1 stop6h 53mFrontier

Deal found 12/10

$88

Find flight deals from Kansas City to Ontario

Most accurate provider	eDreams 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$128 (Frontier)
One-way from	$52 (Trip.com)
Popular in	January
Cheapest in	October
Average price	$432

Provider with most accurate pricing for Kansas City-Ontario flight deals.

Search Deals

Provider most trusted by Cheapflights users for Kansas City-Ontario 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. 10% potential increase in price ($48 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in December 2025

Search Deals

Cheapflights Fare Finder

Use the filters below to find and compare flights from Kansas City to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Mon 1/5

8:45 pm-10:12 pm

1 stop27h 27m

Ontario

Fri 1/9

6:00 am-7:46 pm

1 stop11h 46m

$219

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Wed 12/31

8:45 pm-11:59 pm

1 stop5h 14m

Ontario

Sun 1/4

6:45 am-7:51 pm

1 stop11h 06m

$276

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Wed 1/21

2:45 pm-3:08 pm

1 stop26h 23m

Ontario

Sun 1/25

6:00 am-1:50 pm

1 stop29h 50m

$287

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Wed 1/14

2:45 pm-8:36 pm

1 stop7h 51m

Ontario

Tue 1/27

4:03 pm-1:50 pm

1 stop19h 47m

$287

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Wed 1/14

2:45 pm-8:36 pm

1 stop7h 51m

Ontario

Wed 1/21

5:59 pm-3:05 pm

1 stop19h 06m

$299

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Tue 1/20

2:45 pm-3:08 pm

1 stop26h 23m

Ontario

Tue 2/3

4:03 pm-1:50 pm

1 stop19h 47m

$306

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Thu 1/8

4:25 pm-9:58 pm

1 stop7h 33m

Ontario

Wed 1/14

1:24 pm-11:30 pm

1 stop8h 06m

$317

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Fri 1/9

4:25 pm-9:58 pm

1 stop7h 33m

Ontario

Tue 1/13

1:24 pm-8:33 pm

1 stop5h 09m

$317

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Wed 1/21

9:05 am-5:43 pm

2 stops10h 38m

Ontario

Sun 1/25

5:05 am-12:37 pm

1 stop5h 32m

$322

Kansas CityOntario

MCI - ONT

MCIONT

Kansas City

Wed 1/14

9:05 am-12:47 pm

1 stop5h 42m

Ontario

Tue 1/27

5:05 am-7:47 pm

2 stops12h 42m

$322

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/7

Showing 1-10 of 22 results

Compare providers for flights from Kansas City to Ontario

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Kansas City to Ontario in December.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy2 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*1 star
eDreams	Price Accuracy3 stars	Trust Score*3 stars
JustAirTicket	Price Accuracy-	Trust Score*1 star
Priceline	Price Accuracy1 star	Trust Score*3 stars
Cheapfaremart	Price Accuracy-	Trust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on Kansas City-Ontario flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Kansas City-Ontario flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Kansas City-Ontario flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on Kansas City-Ontario flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Kansas City-Ontario flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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

Prices

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

Currently, February is the cheapest month in which you can book a flight from Kansas City to Ontario (average of $75). Flying from Kansas City to Ontario in November is currently the most expensive (average of $123). 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 MCI to ONT?

A simple way to save on the total cost of your ticket is to fly from Kansas City to Ontario in the evening. If you’re flexible enough to do this you can expect to save up to 52% on your trip compared to booking a flight in the morning.

What is the cheapest day to fly from Kansas City to Ontario?

Travelers seeking maximum savings on their Kansas City to Ontario flight should consider departing on Wednesday evenings when fares are most often at their lowest. Saturday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Ontario

Peruse reviews from past customers who have flown with Southwest, United Airlines, and American Airlines from Kansas City to Ontario to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Southwest

7.9

Good

4,252 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

Southwest

7.9

Good

4,252 reviews

Southwest

7.9

Good

4,252 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

United Airlines

7.4

Good

9,092 reviews

Southwest

7.9

Good

4,252 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

American Airlines

7.2

Good

11,047 reviews

Southwest

7.9

Good

4,252 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

Frontier

5.8

Fair

3,085 reviews

Southwest

7.9

Good

4,252 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

Related info for your journey

How long is the flight from Kansas City to Ontario?
Airlines like Frontier and Alaska Airlines fly from Kansas City to Ontario in about 26h 23m. The time it takes to get you to your destination can typically vary by up to 1h 04m. The distance from Kansas City to Ontario is about 1314 mi. Both multi-stop and nonstop flights can be found to your destination and back.
What are the cheapest airlines flying from Kansas City to Ontario round-trip?
Flying on Frontier is currently your cheapest option to Ontario, with prices starting at $75. Additional round-trip tickets that might be worth considering are offered by United Airlines and Southwest, with the lowest prices starting at $253 and $290, respectively. You may be able to fly from Kansas City to Ontario for 80% less than the average price by searching for these airlines.
What are the cheapest airlines to fly from Kansas City to Ontario one-way?
One-way options have recently been found by users for as low as $67 on Frontier. Other airlines that offer cheap prices include American Airlines from $167 and Southwest from $168 one-way.
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 Ontario?
Currently, February is the cheapest month in which you can book a flight from Kansas City to Ontario (average of $75). Flying from Kansas City to Ontario in November is currently the most expensive (average of $123). 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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Other flights to Ontario

Top 4 airlines flying from Kansas City to Ontario

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$75	Average$231	FlexibilityNo cancel fee	On-time62%
United Airlines	Cheapest$284	Average$432	FlexibilityNo cancel fee	On-time69%
Southwest	Cheapest$290	Average$400	FlexibilityNo cancel fee	On-time63%
American Airlines	Cheapest$298	Average$411	FlexibilityNo cancel fee	On-time71%

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$52+ Cheap flights from Kansas City to Ontario (MCI - ONT)

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 3/4. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Kansas City to Ontario with Cheapflights

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Cheap flight deals from Kansas City to Ontario

Cheapest flights from Kansas City to OntarioExplore 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 December 10, 2025.

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 December 10, 2025.

Find flight deals from Kansas City to Ontario

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

Use the filters below to find and compare flights from Kansas City to Ontario that are best for you.

Compare providers for flights from Kansas City to Ontario

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Kansas City to Ontario in December.

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.

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 Ontario?

What is the cheapest time of day to fly from MCI to ONT?

What is the cheapest day to fly from Kansas City to Ontario?

What’s the top layover airport for flights from Kansas City to Ontario?

What’s the cheapest layover airport for flights from Kansas City to Ontario?

What’s the fastest layover option from Kansas City to Ontario?

Which airport typically offers the quickest layover for flights from Kansas City to Ontario?

Reviews of airlines servicing Ontario

Peruse reviews from past customers who have flown with Southwest, United Airlines, and American Airlines from Kansas City to Ontario to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

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.

How long is the flight from Kansas City to Ontario?

What are the cheapest airlines flying from Kansas City to Ontario round-trip?

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

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

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

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

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

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Kansas City to Ontario

See prices for flight routes from nearby airports that may be better suited for you.

Top 4 airlines flying from Kansas City to Ontario

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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 December 10, 2025.