178 € Cheap Flights from Kansas City International to Ontario International

Compare Kansas City International to Ontario International flight deals

Find the cheapest month or even day of the year to fly to Ontario International

Book the best Ontario International fare with no extra fees

Flight deals from Kansas City International to Ontario International

Looking for a cheap last-minute deal or the best return flight from Kansas City International to Ontario International? Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from Kansas City International to Ontario International

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Kansas City International to Ontario International flights are currently cheapest in April.

Kansas City to Ontario: Flight information

The things to know before you go.
Cheapest flight found178 €
Cheapest month to flyApril

Finding cheap flights from Kansas City International to Ontario International: Frequently asked questions

The best price we found for a return flight from Kansas City International to Ontario International is 178 €. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from Kansas City International to Ontario International. But we found flights with one or more stops from 178 €.
As of February 2026, there are no flights flying from Kansas City International to Ontario International.
The cheapest month to fly from Kansas City International to Ontario International is usually April.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Kansas City International Airport to Ontario International Airport on Saturday, 11 April 2026.
No airlines currently offer direct flights between Kansas City International Airport and Ontario International Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Ontario International but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Ontario is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Frontier Airlines offers the cheapest flight tickets to Ontario International.

Travelling from Kansas City International Airport (MCI) to Ontario International Airport (ONT): what you need to know

  • Ontario's timezone is UTC-7, making Ontario two hours behind Kansas City.

  • Your MCI to ONT flight won't wait if you're running late, so show up at the airport on time. Arrive up to one hour in advance for domestic flights and two hours ahead when you're flying internationally.

  • Travelling during a peak time like July? School holidays and other high seasons can mean longer lines at security. Be extra cautious and arrive up to four hours before international flights and two hours before a domestic departure.

  • We make it a breeze to book a flight with a stopover. To see your options for tickets from Kansas City International Airport to Ontario International Airport, uncheck 'Direct flights only.' Then, pick a flight that has a stop long enough to tour your chosen city. Some great stopovers between MCI and ONT include:

    • Phoenix Sky Harbour International Airport

    • Denver International Airport

    • Harry Reid Airport (formerly McCarran Airport)

How to find the cheapest flights from Kansas City International Airport (MCI) to Ontario International Airport (ONT)

  • At the moment, 80 € is the lowest price we've found for a one-way Kansas City International Airport to Ontario International Airport flight. The best price for a return plane ticket is 178 €. Remember that fares could change due to availability when booking.

  • It's a good idea to book in advance if you're looking for cheap tickets from MCI to ONT. That's because airlines change prices based on demand, which tends to increase closer to the date of departure.

  • Finding cheap flights from Kansas City International Airport to Ontario International Airport is more likely if you're flexible with your dates. Use the 'Whole month' search tool to see the best prices across the month and land a great deal.

  • There's no need to check back in every day to see if fares have dropped when you set up a Price Alert. We'll notify you the moment the price changes on cheap flights from MCI to ONT.

  • Pick your preferred departure and arrival times, airlines and number of stops with the filters. Alternatively, sort your results by 'Cheapest' to see the best deals on flights from Kansas City International Airport to Ontario International Airport.

Handy information about Kansas City International Airport (MCI)

  • The address for MCI is 601 Brasilia Avenue.

  • Kansas City International Airport maintains a solid on-time record, reducing your chances of a delayed flight. Departures from MCI land at their destination as scheduled 81.34% of the time.

  • To reach Kansas City International Airport from central Kansas City, it'll take around 20 minutes by car. This depends on traffic though. It's approximately 32 kilometres from the airport to the city centre.

  • You can expect a trip time of roughly 1 hour 10 minutes when using public transport.

  • Get your travels off to a stress-free start by staying near MCI. Whether you're catching an early flight from Kansas City International Airport to Ontario International Airport or want to avoid feeling rushed, these stays are perfect:

Arriving at Ontario International Airport (ONT)

Getting from Ontario International Airport (ONT) to central Ontario

  • ONT is located at 2900 E. Airport Drive.

  • From Ontario International Airport, Ontario is approximately 6 kilometres away. It takes around 10 minutes to reach the centre by car.

  • If you're taking public transport, expect a journey of about 1 hour 30 minutes.

When to fly to Ontario International Airport (ONT)

  • It's time to work out your trip dates for your flight from Kansas City International Airport to Ontario International Airport. August is the busiest month to head to Ontario. If you're after a quieter vibe, go in May.

  • Book your flight from Kansas City International Airport to Ontario International Airport for August if you'd like to go to Ontario during its warmest month. Expect temperatures of between 15ºC (59ºF) and 35ºC (95ºF).

  • January sees average temperatures of between 4ºC (39ºF) and 23ºC (73ºF). Search for cheap tickets from MCI to ONT sometime then if you want to travel when it's cooler.

Explore more of United States

  • Los Angeles is just one of the many cities in United States waiting to be explored once you've seen the sights of Ontario. Around 56 kilometres away to the west, its best attractions include Griffith Observatory, The Broad and La Brea Tar Pits & Museum.

  • If you're looking to explore another side of United States, consider San Diego, roughly 153 kilometres south of Ontario. San Diego Zoo, USS Midway Museum and SeaWorld San Diego are the start of reasons to visit.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.