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$140+ Cheap flights from Kalispell to Ontario (FCA - 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 9/11. Fares are subject to change and may not be available on all flights or dates of travel.
FCA — ONT
Aug 24 — Aug 311
Mon 8/24
Mon 8/31
1 adult, Economy
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Cheap flight deals from Kalispell to Ontario

Cheapest flights from Kalispell to Ontario
Explore the most affordable flight options available from Kalispell to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 25, 2026.

This Booking.com deal was found by Cheapflights users on 7/22. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/87:45 pm
FCA
-
ONT
1 stop4h 57m
Alaska Airlines
Sat 10/1011:13 am
ONT
-
FCA
1 stop6h 52m
Alaska Airlines
Deal found 7/22$287
This Alaska Airlines deal was found by Cheapflights users on 7/21. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/292:03 pm
FCA
-
ONT
1 stop4h 57m
Alaska Airlines
Mon 11/27:15 am
ONT
-
FCA
1 stop5h 10m
Alaska Airlines
Deal found 7/21$331
This Delta deal was found by Cheapflights users on 7/22. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/205:15 am
FCA
-
ONT
1 stop4h 37m
Delta
Mon 8/246:00 am
ONT
-
FCA
1 stop4h 09m
Delta
Deal found 7/22$333
This Delta deal was found by Cheapflights users on 7/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/185:30 am
FCA
-
ONT
1 stop4h 32m
Delta
Sun 9/276:00 am
ONT
-
FCA
1 stop4h 47m
Delta
Deal found 7/20$354
This United Airlines deal was found by Cheapflights users on 7/24. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/127:15 am
FCA
-
ONT
1 stop5h 57m
United Airlines
Sun 8/161:56 pm
ONT
-
FCA
1 stop4h 55m
United Airlines
Deal found 7/24$378
This United Airlines deal was found by Cheapflights users on 7/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/134:17 pm
FCA
-
ONT
1 stop4h 44m
United Airlines
Mon 8/249:01 am
ONT
-
FCA
1 stop5h 20m
United Airlines
Deal found 7/21$384

Find flight deals from Kalispell to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Kalispell (FCA) to Ontario (ONT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 25, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$287
(Booking.com)

One-way from

$140
(Kiwi.com)

Popular in

July

Cheapest in

April

Average price

$1,214
Provider with most accurate pricing for Kalispell Glacier Park-Ontario flight deals.
Search Deals
Provider most trusted by Cheapflights users for Kalispell Glacier Park-Ontario flights.
Search Deals
From Kalispell Glacier Park to Ontario
Search Deals
One-way flight from Kalispell Glacier Park to Ontario
Search Deals
Highest demand for flights based on searches. 37% potential increase in price ($257 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 20% potential price decrease ($73 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Kalispell 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 July 25, 2026.
Use the filters below to find and compare flights from Kalispell to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

KalispellOntario

FCA - ONT

FCAONT

Kalispell Glacier Park

Thu 10/29

2:03 pm-6:00 pm

1 stop4h 57m

Ontario

Mon 11/2

7:15 am-1:25 pm

1 stop5h 10m

$331
Quickest round-trip

KalispellOntario

FCA - ONT

FCAONT

Kalispell Glacier Park

Thu 8/20

5:15 am-8:52 am

1 stop4h 37m

Ontario

Mon 8/24

6:00 am-11:09 am

1 stop4h 09m

$333

KalispellOntario

FCA - ONT

FCAONT

Kalispell Glacier Park

Fri 9/18

5:30 am-9:02 am

1 stop4h 32m

Ontario

Sun 9/27

6:00 am-11:47 am

1 stop4h 47m

$354

KalispellOntario

FCA - ONT

FCAONT

Kalispell Glacier Park

Thu 8/13

4:17 pm-8:01 pm

1 stop4h 44m

Ontario

Mon 8/24

9:01 am-3:21 pm

1 stop5h 20m

$384

KalispellOntario

FCA - ONT

FCAONT

Kalispell Glacier Park

Thu 10/22

8:01 am-6:05 pm

2 stops11h 04m

Ontario

Sat 10/24

6:02 am-12:23 pm

1 stop5h 21m

$405

KalispellOntario

FCA - ONT

FCAONT

Kalispell Glacier Park

Thu 8/27

4:17 pm-8:01 pm

1 stop4h 44m

Ontario

Wed 9/2

5:00 am-1:29 pm

1 stop7h 29m

$421

KalispellOntario

FCA - ONT

FCAONT

Kalispell Glacier Park

Fri 8/28

4:17 pm-8:01 pm

1 stop4h 44m

Ontario

Tue 9/1

9:01 am-3:21 pm

1 stop5h 20m

$428

KalispellOntario

FCA - ONT

FCAONT

Kalispell Glacier Park

Fri 9/18

8:21 pm-3:47 pm

2 stops20h 26m

Ontario

Sun 9/27

7:12 am-1:28 pm

1 stop5h 16m

$441
Cheapest one-way

KalispellOntario

FCA - ONT

FCAONT

Kalispell Glacier Park

Tue 10/6

6:09 pm-11:46 pm

1 stop6h 37m

$144
Quickest one-way

KalispellOntario

FCA - ONT

FCAONT

Kalispell Glacier Park

Thu 8/27

5:15 am-8:52 am

1 stop4h 37m

$144

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/21

Showing 1-10 of 18 resultsSorted by cheapest first
1
2

Compare providers for flights from Kalispell 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 Kalispell to Ontario in July.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

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

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

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

Currently, April is the cheapest month in which you can book a flight from Kalispell to Ontario (average of $163). Flying from Kalispell to Ontario in July is currently the most expensive (average of $1,214). 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 Kalispell to Ontario?

Airfare is below average for this route at the moment.

Kalispell to Ontario flights typically cost between $784 and $938 in October.
The cheapest round-trip price found within the last 5 days was $287 on Alaska Airlines (Oct 8-Oct 10).

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 July 25, 2026.
See what other customers who have flown with Alaska Airlines and Delta from Kalispell to Ontario have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
7.9
Good
12,712 reviews

Comfort

7.8

Boarding

8.1

Overall

7.9

Entertainment

7.0

Food

7.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

robert,Feb 2026

LAS - SAN

The good customer service team made you fell welcome on the flight.
Alaska Airlines
7.9
Good
12,712 reviews
Alaska Airlines
7.9
Good
12,712 reviews

Comfort

7.8

Boarding

8.1

Overall

7.9

Entertainment

7.0

Food

7.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

robert,Feb 2026

LAS - SAN

The good customer service team made you fell welcome on the flight.
Delta
7.8
Good
8,488 reviews
Alaska Airlines
7.9
Good
12,712 reviews

Comfort

7.8

Boarding

8.1

Overall

7.9

Entertainment

7.0

Food

7.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

robert,Feb 2026

LAS - SAN

The good customer service team made you fell welcome on the flight.

Related info for your journey

Find useful and relevant information for your journey from Kalispell 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 Kalispell to Ontario?

    A quick flight from Kalispell to Ontario can take about 4h 37m. Alaska Airlines provides one of the quickest options available for as low as $333. Kalispell and Ontario are separated by a distance of 999 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from Kalispell to Ontario round-trip?

    Flying on Delta is currently your cheapest option to Ontario, with prices starting at $108. Another option worth looking into is Alaska Airlines, starting at $163 round trip. Users have found that Delta is 74% cheaper than the other options available to this destination.

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

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

  • How can I find direct flights from Kalispell to Ontario?

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

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

    Yes. Cheapflights offers flight deals from Kalispell 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 Kalispell to Ontario?

    Currently, April is the cheapest month in which you can book a flight from Kalispell to Ontario (average of $163). Flying from Kalispell to Ontario in July is currently the most expensive (average of $1,214). 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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Top 2 airlines flying from Kalispell to Ontario

Discover the top 2 airlines that operate flights from Kalispell 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 July 25, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$108Average$318FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$163Average$345FlexibilityNo cancel feeOn-time75%

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