MCI - ONT

$76 Find Cheap Flights from Kansas City to Ontario

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Kansas City to Ontario departing on 9/9. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Ontario

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Kansas City to Ontario, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Kansas City to Ontario, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$226
Typical prices: $395-$284
Frontier
Wed 8/5Wed 8/12
MCI - ONT • 2 stops
Cheapest one-way
$76
Typical prices: $68-$280
Frontier
Wed 9/9
MCI - ONT • 1 stop
Nonstop flights
Not available
There are currently no direct flights between Kansas City and Ontario. You'll need at least 1 connection.
Insights
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Top layover airports
Cheapest • Avg $311 (round-trip)
Shortest trip • 5h 30m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 19% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Ontario!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Kansas City to Ontario (MCI-ONT)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Kansas City to Ontario that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Kansas City to Ontario

Wed, Aug 5 - Wed, Aug 12
Frontier Logo
1:45 pm - 3:07 pm
MCI
-
ONT
27h 22m
2 stops
Frontier Logo
6:00 am - 12:55 pm
ONT
-
MCI
28h 55m
1 stop
$226Frontier
Wed, Jun 3 - Wed, Jun 10
Frontier Logo
2:34 pm - 11:49 pm
MCI
-
ONT
11h 15m
1 stop
Frontier Logo
6:00 am - 1:00 pm
ONT
-
MCI
5h 00m
1 stop
$229Frontier
Tue, Jun 30 - Tue, Jul 7
Frontier Logo
1:45 pm - 11:49 pm
MCI
-
ONT
12h 04m
1 stop
Frontier Logo
6:00 am - 12:55 pm
ONT
-
MCI
4h 55m
1 stop
$230Frontier
Thu, Sep 24 - Mon, Sep 28
Frontier Logo
2:17 pm - 11:55 pm
MCI
-
ONT
11h 38m
1 stop
Frontier Logo
6:00 am - 1:22 pm
ONT
-
MCI
5h 22m
1 stop
$238Frontier
Fri, Jun 19 - Tue, Jul 7
Frontier Logo
1:45 pm - 11:49 pm
MCI
-
ONT
12h 04m
1 stop
Frontier Logo
6:00 am - 12:55 pm
ONT
-
MCI
4h 55m
1 stop
$240Frontier
Wed, Jul 1 - Tue, Jul 7
Frontier Logo
1:45 pm - 10:05 am
MCI
-
ONT
22h 20m
1 stop
Frontier Logo
6:00 am - 12:55 pm
ONT
-
MCI
4h 55m
1 stop
$241Frontier
Tue, Jul 7 - Wed, Jul 15
Frontier Logo
1:45 pm - 10:03 am
MCI
-
ONT
22h 18m
1 stop
Frontier Logo
6:00 am - 12:55 pm
ONT
-
MCI
28h 55m
1 stop
$243Frontier
Tue, Jul 14 - Sat, Jul 18
Frontier Logo
1:45 pm - 10:03 am
MCI
-
ONT
22h 18m
1 stop
Frontier Logo
6:00 am - 12:55 pm
ONT
-
MCI
4h 55m
1 stop
$244Frontier
Tue, Jun 30 - Sun, Jul 12
Frontier Logo
1:45 pm - 10:05 am
MCI
-
ONT
22h 20m
1 stop
Frontier Logo
3:40 pm - 12:55 pm
ONT
-
MCI
19h 15m
1 stop
$246Frontier
Fri, Jul 10 - Mon, Jul 13
Frontier Logo
1:50 pm - 7:53 pm
MCI
-
ONT
8h 03m
1 stop
Frontier Logo
6:00 am - 12:55 pm
ONT
-
MCI
4h 55m
1 stop
$250Frontier
Booking Insights

KAYAK's insights & trends for Kansas City to Ontario flights

Get data-powered insights and trends into flights from Kansas City to Ontario to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Kansas City to Ontario?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Kansas City to Ontario departing in August.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Kansas City to Ontario, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Kansas City to Ontario is October, where tickets cost $306 (return) on average. On the other hand, the most expensive months are December and May, where the average cost of round-trip tickets is $439 and $414 respectively.

Good to know

Low seasonJanuary
Cheapest flight$76
Best time to beat the crowds but there is an average 6% increase in price.
Most popular time to fly with an average 8% increase in price.
Flight from Kansas City to Ontario

When to book flights from Kansas City to Ontario

Are your dates flexible? Find out the best times to travel from Kansas City to Ontario based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Kansas City to Ontario

  • What is the cheapest flight from Kansas City to Ontario?

    In the last 3 days, the lowest price for a flight from Kansas City to Ontario was $76 for a one-way ticket and $226 for a round-trip.

  • Do I need a passport to fly between Kansas City and Ontario?

    A passport is not required to fly from Kansas City to Ontario.

  • Which airports will I be using when flying from Kansas City to Ontario?

    Kansas City and Ontario are both served by 1 main airport. You will leave Kansas City from Kansas City and will be arriving at Ontario.

  • Which aircraft models fly most regularly from Kansas City to Ontario?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Kansas City to Ontario?

    Star Alliance, and oneworld are the airline alliances operating flights between Kansas City and Ontario, with Star Alliance being the most commonly used for this route.

  • Which is the best airline for flights from Kansas City to Ontario, Southwest or United Airlines?

    The two airlines most popular with KAYAK users for flights from Kansas City to Ontario are Southwest and United Airlines. With an average price for the route of $387 and an overall rating of 7.9, Southwest is the most popular choice. United Airlines is also a great choice for the route, with an average price of $360 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from Kansas City to Ontario?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Kansas City to Ontario.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Kansas City to Ontario?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ontario from Kansas City is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Kansas City to Ontario?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Ontario with an airline and back to Kansas City with another airline. Booking your flights between Kansas City and ONT can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Kansas City to Ontario?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Ontario from Kansas City up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 4 airlines serving from Kansas City to Ontario

 
See real verified KAYAK customer reviews for airlines flying from Kansas City to Ontario. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Kansas City to Ontario? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
SouthwestOverall score based on 4284 reviews
8.0Comfort
7.0Food
8.6Crew
8.1Boarding
7.5Entertainment
Airline reviews

Plane was clean and comfortable. Flight attendants and gate staff were professional, friendly and efficient. Boarding and deplaning were orderly and efficient. All in all, the typical excellent Southwest experience.

10.0 ExcellentRobert, May 2026
LAS - SFO
Read more Southwest reviews

Plane was clean and comfortable. Flight attendants and gate staff were professional, friendly and efficient. Boarding and deplaning were orderly and efficient. All in all, the typical excellent Southwest experience.

Not having a five hour delay with little notice! The crew was very kind, though, and just as tired as we passengers were. The flight didn't depart until nearly 1 am...and no reason was ever given.

This leg was much better, but we did have to have a 3 hour lay o er after coming from a very exhausting hiccup with our flight from BNA to Den

The flight was okay. The pilots did an amazing job and kept us updated on the flight. The flight attendants were okay. They found time to be chatty with each other rather than focus on the guests. One of the attendants was a little less warm when asking about my bag I had on my lap that I was using during latter part of the mid- flight. Mind you, it was not the departure descent. I’m respectful to each and every attendant, it was the tone in her voice reminding me to place my carryon bag on the floor. I hope to have a better experience next time.

The Air hostess were very rude on my flight from Houston to Austin . Their regular communication itself felt a they are shouting at people.

Boarding was easy. The seats are small and fairly uncomfortable

The problem with the seat assignments is that there were a lot of rows in the front that were empty but my row at the back was full. Just not so pleasant.

No food or entertainment, just a quick 40 minute flight. A little bumpy due to Santa Ana winds but pilot has no control over that. Good flight and landing!

Good but I prefer choose your own seat. With the new assigned seats they should board from the back I see no advantage to this new boarding. Just like every other airline

Mediocre. Boarding is now unpleasant. The employees, once friendly and nice, are now regularly speaking sternly to passengers, badgering them to do things right so they can take off on time and gate check bags because they don't have enough overhead bin space. The pretzel snack was crushed flat and broken into even smaller pieces, which happens frequently lately. Drink service was suspended before they reached my row.

Late plane. Only one crew on the ground so we b had to wait for Denver flight to come in, board, and depart. At 78 yrs of age I was not pleased trying to get my connection. What really made me angry was the notification you sent me to hurry up or I would miss my connection. Why tell me to hurry up when you got me in late. It was not a good way of treating customers.

No complaints other than luggage carousel was incorrectly guiding passengers to the wrong carousel on the screen.

Outstanding service, efficient & friendly crew, flight was safe, comfortable & on time

The crew was great. Very friendly and responsive. The plane was old, small and tight. We ran out of overhead space and I had to check. Middle seat was particularly tight.

The flight was delayed from take off because only one runway was operational in San Francisco.

Several missed and almost missed connections. It felt like everything was being patched together last minute without enough resources and it ended up being an extremely stressful experience that basically ruined our weekend on the west coast. What a waste.

Packed in plane small uncomfortable seats elbow to elbow nobody wants to be in that situation for the money they paid

Checking in united could not figure out my star alliance gold. Baggage did not get marked priority and didn't receive boarding passes. When got to SFO lounge personal fixed everything Immediately

Flight left on time, arrived early, pleasant staff provided water, coffee, etc. access to bathrooms was reasonable and were well maintained. blankets were available, lots of entertainment options. LUGGAGE SERVICE WAS GREAT. I got my one checked bag quickly and was able to make a bus connection for a 2 hour bus ride saving me from waiting another 1.5 hours.

Terrible, if possible won't be flying again anytime soon!

American delayed the flight for a crew rest period. The delay occurred late in the evening - the earliest i can find is 10:20 pm. With a 6 am flight anyone on the flight would have already have been asleep (unless you are insane, a vampire or on drugs) and at least for me i was already on the way to the airport at 445 am the next morning when i discovered they delayed the flight until 9 am. Given the incoming flight was in the air at 6 pm the evening before this should have been figured out a lot more timely that was there only crew to use. Just frustrating given there is no consideration for customer experience anymore in flying.

Flight: Started on time. Comfortable flight. Arrived on time. Crew: Very cordial and helpful. Drinks and snack was served with a smile. Overall enjoyed the trip. Regards, Hari Doss Chanchala Doss

To have arrived on time and not 3 hours late after having already spent $100 to change to an earlier flight, only to arrive back home close to the original flight time.

American Airlines is a miserable experience. It is predictably miserable, in the sense that every time I fly American, I brace myself for the certainty that it will be unpleasant and uncomfortable. But it is unpredictable in the sense that I never know if the flight will be on time or delayed nine hours (both happened to me this week). I never know if I will be able to sit in the seat that I selected when I purchased the ticket or if I will be told by Customer Service (!!!) that I must relocate from first class to a seat in the back of the aircraft with no explanation (both happened to me this week). Will the food be frozen and half defrosted, or scalding hot? Will the drinks be warm? Will the flight attendants be surly and mean? Will the toilets be cramped and foul? Will the seats be narrow and uncomfortable? Will there be a real electric outlet at the seat, or just an unreliable USB-2 port? Will there be enough seats in the boarding lounge or just a few? Will the boarding process be smooth and efficient, or will the gate agents mess it up and delay it needlessly for 30 or 40 minutes? Will the catering and cleaning crew be prompt or will they take an extra 30 minutes? Will the brakes on the aircraft work properly, or will the pilot delay takeoff for four hours while the ground crew attends to what can only be described as routine maintenance that should have been done the night before? I've eexperienced every one of these unpleasant things this year, 2026. The only thing I can reliably count on is that American will find a new way to make the experience of flying as miserable as they possibly can.

Wifi was spotty. Tray table was very dirty when I sat down.

The WiFi would not connect enough for me to do my actual work. It permaspooled, disconnected, said it was connected, then wouldn't open an email... it was frustrating. I am not a tall person, 5'4" - and I felt cramped with little room to reach into my bag under the seat in front of me. I feel sorry for anyone taller than me having to fly. the one positive thing I will add, is the overhead bins are roomy enough to manage more bags than other carriers.

Going non stop to lax like I paid for. Not stopping in MCI for gas. Too long of delays

Delayed for mechanical and no updates on what was happening and how long the delay might be.

A first class seat should fit a fat person, and this doesn't. The trays in the armrest are less functional than an ordinary tray in the back of the seat.

The experience at checkin for my American Airlines flight from Sacramento to LAX was very good including the assistance I received in getting my bags checked in and boarding passes printed. Was pleasantly surprised the my bags were checked through all the way to my destination at Clark International Airport in Angeles, Philippines.

The staff at the check in counter was so rude. Made you feel Incompetent

Frontier scheduled a 40 minute connection in DEN. What they failed to mention was that they “close the doors” 20 mins prior to departure, which means you only have 20 mins. Not enough time. Possibly against DOT regulations. Filing complaint.

Flight was scheduled at 9:40pm. Got delayed to 10 am, the next day. crazy

The bag check, flight check-in, and onboard experience convinced my wife and me that we will actively go out of our way to avoid flying Frontier Airlines in the future. At bag check, we were informed that check-in could only be completed via the Frontier mobile app. Unfortunately, the app was extremely frustrating—sending us through repetitive, confusing loops that repeatedly forced us to decline add-on services with nearly every click. While most airline apps upsell, this one felt intentionally exhausting. As the process dragged on, we became genuinely concerned that my phone battery would die before check-in could be completed. We approached the bag check staff—who were standing together talking—and explained both our frustration and our predicament. They laughed. Later, my wife described the interaction as “gaslighting,” which felt accurate. We were then informed it would cost $25 per person simply to have our boarding passes printed. From that point forward, the tone of the experience was consistently hostile. The bag check employees were condescending and combative, behaving more like bullies than customer service staff. Unfortunately, that same attitude continued onboard. One flight attendant argued with me when I attempted to stow my backpack in the overhead bin. I explained that we had each paid $75 to check our bags specifically so we would not need to use carry-on space and could have adequate legroom. She demanded to see my ticket, pointed out that it said “no carry-on”—which I acknowledged—and I reiterated that this was precisely why we paid to check our bags. Her response was, “I don’t make the rules.” She then walked away, but not before asking if I “truly wanted to fly back to Chicago today?”—an unnecessary and unmistakable threat. It is also worth noting that despite booking our tickets together in the same transaction, we were not seated together. Upon our return to Chicago—where we could once again sit together—we compared onboard experiences. We both remarked on how unhappy the flight attendants appeared and how each of us was separately asked whether we would like to purchase a beverage. We declined. At no point was water mentioned as an option, leaving us with the clear impression that even water came at a cost—or that complimentary water, if available at all, was deliberately left unmentioned. Overall, the experience was shocking and deeply disappointing, but it was also a profound learning experience—one we will not forget and will not repeat. -Steve

Plane was hot and miserable and the crew was rude!

12 hour delay required getting on and off plane 3 times - would have at least liked to have been offered a snack or drink

They didn’t offer a water, even after I asked

They switched our terminal 3 times and we were delayed for four plus hours!!!

It was an early flight and most people napped/slept and the crew let us which was nice.

The crew acted like they had never done this and kept barking passive aggressive orders at people. + the security line + the delay + sitting on the tarmac for 2 hours + none of the apps or signage updating with correct times

Everything you need to know for your flight from Kansas City to Ontario

Information on your arrival and departure airports