$139 Cheap Flights from Kalispell (FCA) to Ontario Intl. Airport (ONT)

View $139 flight on Fri, Jul 3, 2026Opens in a new window

Popular airlines from Glacier Park Intl. Airport (FCA) to Ontario Intl. Airport (ONT)

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Cheap Flights from Kalispell to Ontario Intl. Airport (FCA-ONT)

Prices were available within the past 7 days and start at $139 for one-way flights and $277 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Thu, Oct 8 - Sun, Oct 11
FCA
Kalispell
ONT
Ontario
$277 Roundtrip, found 4 hours ago
$277
Roundtrip
found 4 hours ago
Select Delta flight, departing Thu, Oct 8 from Kalispell to Ontario, returning Sun, Oct 11, priced at $277 found 4 hours ago
United
Thu, Jul 2 - Sat, Jul 4
FCA
Kalispell
ONT
Ontario
$277 Roundtrip, found 16 hours ago
$277
Roundtrip
found 16 hours ago
Select United flight, departing Thu, Jul 2 from Kalispell to Ontario, returning Sat, Jul 4, priced at $277 found 16 hours ago
Alaska Airlines
Mon, Oct 26 - Thu, Oct 29
FCA
Kalispell
ONT
Ontario
$279 Roundtrip, found 4 days ago
$279
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Mon, Oct 26 from Kalispell to Ontario, returning Thu, Oct 29, priced at $279 found 4 days ago
Alaska Airlines
Wed, Apr 14 - Wed, Apr 21
FCA
Kalispell
ONT
Ontario
$282 Roundtrip, found 6 days ago
$282
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Wed, Apr 14 from Kalispell to Ontario, returning Wed, Apr 21, priced at $282 found 6 days ago
Alaska Airlines
Fri, Dec 4 - Sun, Dec 6
FCA
Kalispell
ONT
Ontario
$284 Roundtrip, found 6 days ago
$284
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Fri, Dec 4 from Kalispell to Ontario, returning Sun, Dec 6, priced at $284 found 6 days ago
Delta
Fri, Oct 16 - Sun, Oct 18
FCA
Kalispell
ONT
Ontario
$287 Roundtrip, found 15 hours ago
$287
Roundtrip
found 15 hours ago
Select Delta flight, departing Fri, Oct 16 from Kalispell to Ontario, returning Sun, Oct 18, priced at $287 found 15 hours ago
Alaska Airlines
Fri, Oct 16 - Mon, Oct 19
FCA
Kalispell
ONT
Ontario
$289 Roundtrip, found 15 hours ago
$289
Roundtrip
found 15 hours ago
Select Alaska Airlines flight, departing Fri, Oct 16 from Kalispell to Ontario, returning Mon, Oct 19, priced at $289 found 15 hours ago
Delta
Fri, Oct 16 - Mon, Oct 19
FCA
Kalispell
ONT
Ontario
$292 Roundtrip, found 15 hours ago
$292
Roundtrip
found 15 hours ago
Select Delta flight, departing Fri, Oct 16 from Kalispell to Ontario, returning Mon, Oct 19, priced at $292 found 15 hours ago
Alaska Airlines
Thu, Dec 3 - Sun, Dec 6
FCA
Kalispell
ONT
Ontario
$295 Roundtrip, found 2 days ago
$295
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Thu, Dec 3 from Kalispell to Ontario, returning Sun, Dec 6, priced at $295 found 2 days ago
American Airlines
Thu, Jun 25 - Tue, Jun 30
FCA
Kalispell
ONT
Ontario
$483 Roundtrip, found 5 hours ago
$483
Roundtrip
found 5 hours ago
Select American Airlines flight, departing Thu, Jun 25 from Kalispell to Ontario, returning Tue, Jun 30, priced at $483 found 5 hours ago

Alternative airports near Ontario

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to John Wayne SNA. Average driving time to city center is 42 minutes. Flights from $1,215
SNA
John Wayne
Average driving time to city center42 min
Flights from $1,215

Frequently asked questions

How much does a flight from Kalispell, MT (FCA-Glacier Park Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.) cost?
You can find cheap one-way flights from $139 and cheap return flights from $277 Kalispell, MT (FCA-Glacier Park Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.) with Expedia. One-way flights usually range from $199 to $1079, and return flights typically cost between $344 and $1298. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Kalispell, MT (FCA-Glacier Park Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Kalispell, MT (FCA-Glacier Park Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.)?
September is the cheapest month to fly from Kalispell, MT (FCA) to Ontario, CA (ONT), with average return fares around $305. This price is about 25% lower than the average, as demand typically decreases after the summer peak. Other economical months to consider are January and April.*Averages based on flights available on Expedia in the last year.
Which airlines fly direct from Kalispell, MT (FCA-Glacier Park Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.)?
Enter FCA to ONT and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from Kalispell, MT (FCA-Glacier Park Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.)?
United is one of the cheapest airlines offering connecting flights from Kalispell, MT (FCA) to Ontario, CA (ONT) with a layover in Denver Intl. (DEN), starting from around $210 for a round-trip ticket. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from Kalispell, MT (FCA-Glacier Park Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.)?
To find a cheap flight from Kalispell, MT (FCA-Glacier Park Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Kalispell, MT (FCA-Glacier Park Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.)?
For flights from Kalispell (FCA) to Ontario (ONT), September and April are the best months to travel. You can find return flights for about $305 in September, making it a cost-effective choice. April also offers similar pricing, and both months provide pleasant weather for your trip.*Prices based on flights available on Expedia in the last year.
What is the earliest flight from Kalispell, MT (FCA-Glacier Park Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.)?
The earliest flight from Glacier Park International Airport (FCA) to Los Angeles - Ontario International Airport (ONT) typically departs at around 5:00 AM local time, operated by Delta. This seasonal service is active in February, giving you a head start on your California adventure. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from Kalispell, MT (FCA-Glacier Park Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.)?
For flights from Kalispell (FCA-Glacier Park Intl.) to Ontario (ONT-Los Angeles - Ontario Intl.), the most popular departure times are in the early afternoon, from 12pm to 3pm. About 38% of passengers prefer this time window. Many major carriers, including Alaska Airlines and United Airlines, operate flights during this period. This timing works well because it allows you to enjoy your morning before heading to Ontario.
How long does it take to fly from Kalispell, MT (FCA-Glacier Park Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.)?
A flight from FCA to ONT with a layover takes around 7 hours, with the route covering approximately 999 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Kalispell, MT (FCA-Glacier Park Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.)?
First class seats are offered on the FCA to ONT route. First class cabins are available on:

  • Delta Air Lines
  • United Airlines
  • American Airlines

How do I earn miles on a Kalispell, MT (FCA-Glacier Park Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.) flight with Expedia?
It's easy to earn miles on a Kalispell, MT (FCA-Glacier Park Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Ontario from Glacier Park Intl. (FCA)?
From Glacier Park Intl. (FCA), you can fly into Los Angeles - Ontario Intl. (ONT) to reach Ontario. Some flights may connect through major hubs like Seattle - Tacoma Intl. (SEA), Denver Intl. (DEN), Portland Intl. (PDX) before reaching Ontario. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Kalispell, MT (FCA-Glacier Park Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.) at the last minute?
Typically, booking a last minute flight from Kalispell, MT (FCA-Glacier Park Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Kalispell, MT (FCA-Glacier Park Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.) flight and hotel package?
Securing a Kalispell, MT (FCA-Glacier Park Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.) Los Angeles Vacation Packages is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Kalispell, MT (FCA-Glacier Park Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.)?
If you booked your Kalispell, MT (FCA-Glacier Park Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Glacier Park Intl.
Destination airport
Ontario Intl. Airport
Airlines serving
Alaska Airlines, American Airlines, Delta, United
Roundtrip price
$273
Distance
999 mi

Book with confidence

Kalispell to Ontario Intl. Airport Flights

The cheapest times to fly from Kalispell to Ontario Intl. Airport

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Kalispell to Ontario Intl. Airport are during the month of October. You can find some of the cheapest flights from Kalispell to Ontario Intl. Airport with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Kalispell to Ontario Intl. Airport

Sunday is one of the best days to book for cheap flights from Kalispell to Ontario Intl. Airport: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Kalispell to Ontario Intl. Airport

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Kalispell to Ontario Intl. Airport in 2026. You can also book with separate airlines for your outbound and return journeys, from $139 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Kalispell to Ontario Intl. Airport flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Kalispell to Ontario Intl. Airport airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Kalispell to Ontario Intl. Airport Flights

*Flight schedules are subject to change.

*Available to One Key members.

 

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