GTF - ONT

$318 Find Cheap Flights from Great Falls to Ontario - Compare and Save

1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$318
Typical prices: $275-$389
Delta
Tue 10/2Tue 10/9
GTF - ONT • 1 stop
Nonstop flights
Not available
There are currently no direct flights between Great Falls and Ontario. You'll need to take a connecting flight to reach the destination.
Insights
Insights
When to travel
February
Cheapest • 15% price drop
January
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Denver Intl (DEN)
Cheapest • Avg $324 (round-trip)
Salt Lake City (SLC)
Shortest trip • 5h 12m (one-way)
Insights
Insights
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Flight Deals

Cheap Flights from Great Falls to Ontario (GTF-ONT)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Great Falls to Ontario

Fri, Oct 2 - Fri, Oct 9
Delta Logo
6:21 pm - 11:47 pmGTF  Great Falls-ONT Ontario
6h 26m1 stop Salt Lake City
Delta Logo
9:45 am - 5:47 pmONT  Ontario-GTF Great Falls
7h 02m1 stop Salt Lake City
$318Delta
Thu, Nov 12 - Sun, Nov 15
Delta Logo
6:19 pm - 11:49 pmGTF  Great Falls-ONT Ontario
6h 30m1 stop Salt Lake City
Delta Logo
6:00 am - 12:41 pmONT  Ontario-GTF Great Falls
5h 41m1 stop Salt Lake City
$318Delta
Sat, Jan 23 - Wed, Jan 27
Alaska Airlines Logo
4:08 pm - 10:41 pmGTF  Great Falls-ONT Ontario
7h 33m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
7:00 am - 3:28 pmONT  Ontario-GTF Great Falls
7h 28m1 stop Seattle/Tacoma Intl
$318Alaska Airlines
Fri, Jan 22 - Wed, Jan 27
Alaska Airlines Logo
4:08 pm - 10:41 pmGTF  Great Falls-ONT Ontario
7h 33m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
7:00 am - 3:28 pmONT  Ontario-GTF Great Falls
7h 28m1 stop Seattle/Tacoma Intl
$318Alaska Airlines
Fri, Nov 13 - Sun, Nov 15
Delta Logo
6:19 pm - 11:49 pmGTF  Great Falls-ONT Ontario
6h 30m1 stop Salt Lake City
Delta Logo
6:00 am - 12:41 pmONT  Ontario-GTF Great Falls
5h 41m1 stop Salt Lake City
$318Delta
Sun, Jan 24 - Sat, Jan 30
Alaska Airlines Logo
4:08 pm - 10:41 pmGTF  Great Falls-ONT Ontario
7h 33m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
7:00 am - 3:28 pmONT  Ontario-GTF Great Falls
7h 28m1 stop Seattle/Tacoma Intl
$318Alaska Airlines
Tue, Jan 26 - Fri, Jan 29
Alaska Airlines Logo
4:08 pm - 10:41 pmGTF  Great Falls-ONT Ontario
7h 33m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
7:00 am - 3:28 pmONT  Ontario-GTF Great Falls
7h 28m1 stop Seattle/Tacoma Intl
$318Alaska Airlines
Thu, Jan 21 - Fri, Jan 29
Alaska Airlines Logo
4:08 pm - 10:41 pmGTF  Great Falls-ONT Ontario
7h 33m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
7:00 am - 3:28 pmONT  Ontario-GTF Great Falls
7h 28m1 stop Seattle/Tacoma Intl
$318Alaska Airlines
Thu, Jan 21 - Sat, Jan 30
Alaska Airlines Logo
4:08 pm - 10:41 pmGTF  Great Falls-ONT Ontario
7h 33m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
7:00 am - 3:28 pmONT  Ontario-GTF Great Falls
7h 28m1 stop Seattle/Tacoma Intl
$318Alaska Airlines
Wed, Jan 27 - Sat, Jan 30
Alaska Airlines Logo
4:08 pm - 10:41 pmGTF  Great Falls-ONT Ontario
7h 33m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
7:00 am - 3:28 pmONT  Ontario-GTF Great Falls
7h 28m1 stop Seattle/Tacoma Intl
$318Alaska Airlines
Booking Insights

Price, demand and travel trends for Great Falls to Ontario flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights from Great Falls to Ontario with more confidence.

How much is a round-trip flight from Great Falls to Ontario?

Round-trip flights from Great Falls to Ontario start at $318. Prices are typical for this route right now, with typical round-trip fares ranging from $275 to $389. The lowest price found in the past 5 days was $318 on Delta.

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Key details for Great Falls to Ontario flights

Low season

December

Cheapest flight

$318
Most popular time to fly with an average 150% increase in price.
Flight from Great Falls to Ontario

When to book flights from Great Falls to Ontario

Are your dates flexible? Find out the best times to travel from Great Falls to Ontario based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

Your Great Falls to Ontario flight questions, answered

Find helpful route details based on KAYAK data, including flight times, airports, airlines and booking questions.

  • Which airports can I use when flying from Great Falls to Ontario?

    Flights from Great Falls to Ontario usually depart from Great Falls (GTF) and arrive at Ontario (ONT).

  • What cabin classes can I book on flights from Great Falls to Ontario?

    Only Economy Class is available on flights from Great Falls to Ontario.

  • Which airports do connecting flights from Great Falls to Ontario pass through?

    Connecting flights from Great Falls to Ontario most commonly pass through:

    • Salt Lake City (SLC) - 90% of one-stop connections
    • Denver Intl (DEN) - 10% of one-stop connections
    Together, these airports account for 100% of one-stop bookings on this route.

  • Can I save money by using flexible dates for flights from Great Falls to Ontario?

    Yes. Being flexible with your travel dates can save you up to 24% on the Great Falls to Ontario route. Wednesday is the cheapest departure day at $275 round-trip on average, while Friday is the most expensive at $359, a difference of $84. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • What popular places can I visit in Ontario?

    Some of the most popular sights in Ontario are Ontario Convention Center, Ontario Mills and Cucamonga-Guasti Regional Park. These are among the most viewed places in Ontario on KAYAK.

  • How long is a flight from Great Falls to Ontario?

    A nonstop flight from Great Falls to Ontario takes 0h 00m, covering 982 miles.

  • Do I need a passport to fly from Great Falls to Ontario?

    No, a passport is not required for this domestic route, but you will need a real ID-compliant driver's license, a state ID, or another TSA-accepted form of identification.

  • Have flight prices from Great Falls to Ontario changed much recently?

    Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $318 to $1,124. That means the highest observed fare was about 4x higher than the lowest one.

  • How much time can I save by choosing a different layover airport from Great Falls to Ontario?

    Flying via Salt Lake City (SLC) gives the shortest average 1-stop total travel time at 5h 12m, compared with 6h 51m via Denver Intl (DEN).

  • What is the time difference between Great Falls and Ontario?

    Ontario is 1 hour behind Great Falls (Pacific Time vs Mountain Time). Plan for the time shift when scheduling connections or first-day activities.

  • What car rental options are available at Ontario Airport (ONT)?

    Ontario Airport (ONT) hosts 5 major car rental companies, with daily rates starting from around $18 for economy cars. Top options include:
    · Fox
    · Thrifty
    · Europcar
    · Dollar
    · Alamo

  • How much should I expect to pay for a Great Falls to Ontario flight?

    Round-trip flights from Great Falls to Ontario range from $275 to $389, with an average of $328 over the past 12 months. Anything below $275 counts as a good deal.

Your guide to booking Great Falls to Ontario flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates can be flexible, aim for a Wednesday departure instead of Friday. On this route, Wednesday flights average $275 - about $84 less than Friday (23% savings) based on the last 12 months.
  • If you can choose when to travel, plan your Great Falls to Ontario trip for February. Fares historically average $280 round-trip in that month - typically $541 less than the most expensive month, which is January (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to Ontario Airport.
    - Azure Hotel & Suites, Trademark Collection by Wyndham
    - La Quinta Inn & Suites by Wyndham Ontario Airport
    - Holiday Inn Ontario Airport By IHG

More options for your flight from Great Falls to Ontario

Complete your trip to Ontario with a hotel stay or car rental

Car rentals in Ontario
Hotels in Ontario
Vacations in Ontario