HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$155+ 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 10/9. Fares are subject to change and may not be available on all flights or dates of travel.
FCA — ONT
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Kalispell to Ontario with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap 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 September 11, 2025.

Round-trip from

$244
(KAYAK)

One-way from

$155
(Delta)

Popular in

March

Cheapest in

May

Average price

$451
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. 6% potential increase in price ($25 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
Search Deals

Find 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 September 11, 2025.

This Alaska Airlines deal was found by Cheapflights users on 9/8. 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.
Tue 9/308:02 pmFCA - ONT
1 stop15h 42mAlaska Airlines
Tue 10/76:00 amONT - FCA
1 stop5h 22mAlaska Airlines
Deal found 9/8$260
This Delta deal was found by Cheapflights users on 9/8. 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 10/26:10 pmFCA - ONT
1 stop6h 32mDelta
Mon 10/64:35 pmONT - FCA
1 stop5h 34mDelta
Deal found 9/8$261
This Delta deal was found by Cheapflights users on 9/8. 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 10/26:10 pmFCA - ONT
1 stop6h 32mDelta
Sat 10/46:00 amONT - FCA
1 stop4h 14mDelta
Deal found 9/8$285
This Alaska Airlines deal was found by Cheapflights users on 9/8. 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.
Tue 9/308:02 pmFCA - ONT
1 stop19h 10mAlaska Airlines
Mon 10/67:43 pmONT - FCA
1 stop15h 39mAlaska Airlines
Deal found 9/8$312
This Alaska Airlines deal was found by Cheapflights users on 9/8. 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.
Wed 10/18:02 pmFCA - ONT
1 stop23h 45mAlaska Airlines
Mon 10/67:43 pmONT - FCA
1 stop27h 15mAlaska Airlines
Deal found 9/8$322
This Alaska Airlines deal was found by Cheapflights users on 9/8. 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.
Wed 10/18:02 pmFCA - ONT
2 stops28h 52mAlaska Airlines
Tue 10/76:00 amONT - FCA
1 stop5h 22mAlaska Airlines
Deal found 9/8$327
This United Airlines deal was found by Cheapflights users on 9/8. 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.
Fri 10/34:08 pmFCA - ONT
1 stop7h 44mUnited Airlines
Tue 10/71:15 pmONT - FCA
1 stop7h 16mUnited Airlines
Deal found 9/8$331
This Alaska Airlines deal was found by Cheapflights users on 9/8. 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.
Tue 9/308:02 pmFCA - ONT
1 stop23h 45mAlaska Airlines
Fri 10/107:43 pmONT - FCA
1 stop21h 12mAlaska Airlines
Deal found 9/8$332
This Alaska Airlines deal was found by Cheapflights users on 9/8. 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.
Wed 10/18:02 pmFCA - ONT
1 stop15h 42mAlaska Airlines
Fri 10/107:43 pmONT - FCA
1 stop21h 12mAlaska Airlines
Deal found 9/8$342
This Alaska Airlines deal was found by Cheapflights users on 9/11. 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.
Wed 12/176:30 amFCA - ONT
1 stop5h 49mAlaska Airlines
Wed 12/317:00 amONT - FCA
1 stop5h 36mAlaska Airlines
Deal found 9/11$345
This Alaska Airlines deal was found by Cheapflights users on 9/8. 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.
Tue 9/308:02 pmFCA - ONT
1 stop19h 10mAlaska Airlines
Sat 10/47:10 amONT - FCA
2 stops15h 48mAlaska Airlines
Deal found 9/8$351

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 September 11, 2025.
Use the filters below to find and compare flights from Kalispell to Ontario that are best for you.

Fly from

Kalispell

Fly to

Ontario

Route

Depart

Return

Price

KalispellOntario

FCA - ONT

FCAONT

Kalispell Glacier Park

Thu 10/2

6:10 pm-11:42 pm

1 stop6h 32m

Ontario

Sun 10/5

6:00 am-11:14 am

1 stop4h 14m

$261

KalispellOntario

FCA - ONT

FCAONT

Kalispell Glacier Park

Thu 10/2

6:10 pm-11:42 pm

1 stop6h 32m

Ontario

Sat 10/4

6:00 am-11:14 am

1 stop4h 14m

$285

KalispellOntario

FCA - ONT

FCAONT

Kalispell Glacier Park

Tue 9/30

8:02 pm-10:44 am

1 stop15h 42m

Ontario

Tue 10/7

7:10 am-11:58 pm

2 stops15h 48m

$307

KalispellOntario

FCA - ONT

FCAONT

Kalispell Glacier Park

Tue 9/30

8:02 pm-2:12 pm

1 stop19h 10m

Ontario

Mon 10/6

7:43 pm-12:22 pm

1 stop15h 39m

$312

KalispellOntario

FCA - ONT

FCAONT

Kalispell Glacier Park

Tue 9/30

8:02 pm-2:12 pm

1 stop19h 10m

Ontario

Sat 10/4

7:10 am-1:52 pm

1 stop5h 42m

$312

KalispellOntario

FCA - ONT

FCAONT

Kalispell Glacier Park

Wed 10/1

8:02 pm-6:47 pm

1 stop23h 45m

Ontario

Mon 10/6

7:43 pm-11:58 pm

1 stop27h 15m

$322

KalispellOntario

FCA - ONT

FCAONT

Kalispell Glacier Park

Wed 10/1

8:02 pm-6:47 pm

1 stop23h 45m

Ontario

Sat 10/4

7:10 am-1:52 pm

1 stop5h 42m

$322

KalispellOntario

FCA - ONT

FCAONT

Kalispell Glacier Park

Fri 10/3

2:31 pm-8:24 pm

1 stop6h 53m

Ontario

Thu 10/9

9:36 am-3:27 pm

1 stop4h 51m

$331

KalispellOntario

FCA - ONT

FCAONT

Kalispell Glacier Park

Wed 10/1

4:08 pm-10:52 pm

1 stop7h 44m

Ontario

Thu 10/9

9:36 am-3:27 pm

1 stop4h 51m

$331

KalispellOntario

FCA - ONT

FCAONT

Kalispell Glacier Park

Tue 9/30

6:30 am-12:51 pm

1 stop7h 21m

Ontario

Thu 10/9

9:36 am-3:27 pm

1 stop4h 51m

$331

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Showing 1-10 of 23 results
1
2
3

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, August is the cheapest month in which you can book a flight from Kalispell to Ontario (average of $246). Flying from Kalispell to Ontario in March is currently the most expensive (average of $328). 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 FCA to ONT?

Find hourly flight availability from Kalispell to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 11, 2025.

One of the essential ways to save on airfare from Kalispell to Ontario is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the afternoon could potentially save you up to 23% on airfare.

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 September 11, 2025.
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
8.0
Very good
10,000 reviews

Entertainment

7.0

Food

7.1

Overall

8.0

Comfort

7.8

Boarding

8.1

Crew

8.5

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.0

Food

7.1

Overall

8.0

Comfort

7.8

Boarding

8.1

Crew

8.5

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Delta
8.0
Very good
7,960 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.0

Food

7.1

Overall

8.0

Comfort

7.8

Boarding

8.1

Crew

8.5

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.

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 6h 32m. Delta provides one of the quickest options available for as low as $261. 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 Alaska Airlines is currently your cheapest option to Ontario, with prices starting at $253. Another option worth looking into is Delta, starting at $254 round trip. Users have found that Alaska Airlines is 26% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from Kalispell to Ontario one-way?

    The cheapest airlines for a one-way flight from Kalispell to Ontario are Delta ($155), United Airlines ($174), and Alaska Airlines ($199).

  • 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, August is the cheapest month in which you can book a flight from Kalispell to Ontario (average of $246). Flying from Kalispell to Ontario in March is currently the most expensive (average of $328). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Kalispell to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
Bozeman to San Francisco flights
Bozeman to Los Angeles flights
Bozeman to Las Vegas flights
Missoula to San Francisco flights
Bozeman to San Diego flights
Billings to Los Angeles flights
Great Falls to Las Vegas flights
Missoula to Los Angeles flights
Kalispell to San Diego flights
Bozeman to Ontario flights
Kalispell to San Francisco flights
Missoula to Santa Ana flights
Missoula to Las Vegas flights
Missoula to Oakland flights
Billings to Las Vegas flights
Missoula to Sacramento flights
Bozeman to Santa Ana flights
Helena to Los Angeles flights
Kalispell to Los Angeles flights
Missoula to San Diego flights
Missoula to Ontario flights
Bozeman to Oakland flights
Helena to Las Vegas flights
Billings to Santa Barbara flights
Bozeman to Burbank flights
Billings to San Diego flights
Missoula to Burbank flights
Bozeman to San Jose flights
Kalispell to Burbank flights
Helena to San Diego flights
Kalispell to Las Vegas flights
Billings to San Francisco flights
Bozeman to Sacramento flights
Kalispell to Santa Ana flights
Helena to Ontario flights
Helena to Santa Ana flights
Billings to Ontario flights
Billings to Reno flights
Kalispell to Oakland flights
Billings to Santa Ana flights
Bozeman to Reno flights
Great Falls to San Diego flights
Billings to Sacramento flights
Bozeman to Long Beach flights
Great Falls to Sacramento flights
Missoula to San Jose flights
Missoula to Santa Barbara flights
Butte to Las Vegas flights
Kalispell to Palm Springs flights

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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$253Average$463FlexibilityNo cancel feeOn-time75%
DeltaCheapest$254Average$308FlexibilityNo cancel feeOn-timeN/A

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.