ONT - GTF

$179 Find Cheap Flights from Ontario to Great Falls - Compare and Save

1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$358
Typical prices: $484-$718
Delta
Mon 12/10Fri 12/14
ONT - GTF • 1 stop
Cheapest one-way
$179
Typical prices: $212-$306
Delta
Mon 3/19
ONT - GTF • 1 stop
Nonstop flights
Not available
There are currently no direct flights between Ontario and Great Falls. You'll need to take a connecting flight to reach the destination.
Insights
Insights
When to travel
July
Cheapest • 38% price drop
November
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Salt Lake City (SLC)
Cheapest • Avg $551 (round-trip)
Denver Intl (DEN)
Shortest trip • 7h 32m (one-way)
Insights
Insights
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Flight Deals

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

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

Recent round-trip flight deals from Ontario to Great Falls

Sat, Jan 30 - Tue, Feb 2
Alaska Airlines Logo
7:00 am - 3:28 pmONT  Ontario-GTF Great Falls
7h 28m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
4:08 pm - 10:41 pmGTF  Great Falls-ONT Ontario
7h 33m1 stop Seattle/Tacoma Intl
$358Alaska Airlines
Fri, Mar 19 - Mon, Mar 22
Alaska Airlines Logo
6:00 am - 4:13 pmONT  Ontario-GTF Great Falls
9h 13m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
4:55 pm - 10:39 pmGTF  Great Falls-ONT Ontario
6h 44m1 stop Seattle/Tacoma Intl
$358Alaska Airlines
Thu, Dec 10 - Mon, Dec 14
Delta Logo
5:04 pm - 10:29 pmONT  Ontario-GTF Great Falls
4h 25m1 stop Salt Lake City
Delta Logo
6:19 pm - 11:57 pmGTF  Great Falls-ONT Ontario
6h 38m1 stop Salt Lake City
$358Delta
Fri, Mar 19 - Mon, Mar 22
Delta Logo
6:00 am - 12:27 pmONT  Ontario-GTF Great Falls
5h 27m1 stop Salt Lake City
Delta Logo
1:10 pm - 10:43 pmGTF  Great Falls-ONT Ontario
10h 33m2 stops Salt Lake City Seattle/Tacoma Intl
$364Delta
Thu, Dec 10 - Mon, Dec 14
Delta Logo
5:04 pm - 10:29 pmONT  Ontario-GTF Great Falls
4h 25m1 stop Salt Lake City
Delta Logo
1:19 pm - 10:59 pmGTF  Great Falls-ONT Ontario
10h 40m2 stops Salt Lake City Seattle/Tacoma Intl
$364Delta
Thu, Dec 10 - Mon, Dec 14
Delta Logo
7:00 am - 5:39 pmONT  Ontario-GTF Great Falls
9h 39m2 stops Seattle/Tacoma Intl Salt Lake City
Delta Logo
1:19 pm - 10:59 pmGTF  Great Falls-ONT Ontario
10h 40m2 stops Salt Lake City Seattle/Tacoma Intl
$394Delta
Tue, Nov 24 - Fri, Nov 27
United Airlines Logo
5:00 am - 1:49 pmONT  Ontario-GTF Great Falls
7h 49m1 stop Denver Intl
United Airlines Logo
2:45 pm - 8:51 pmGTF  Great Falls-ONT Ontario
7h 06m1 stop Denver Intl
$408United Airlines
Sat, Jan 30 - Tue, Feb 2
Alaska Airlines Logo
7:00 am - 3:28 pmONT  Ontario-GTF Great Falls
7h 28m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
4:08 pm - 5:22 pmGTF  Great Falls-ONT Ontario
26h 14m2 stops Seattle/Tacoma Intl Boise Air Term. Gowen Fld
$411Alaska Airlines
Sat, Jan 30 - Tue, Feb 2
Alaska Airlines Logo
7:10 am - 3:28 pmONT  Ontario-GTF Great Falls
7h 18m2 stops Portland Seattle/Tacoma Intl
Alaska Airlines Logo
4:08 pm - 10:41 pmGTF  Great Falls-ONT Ontario
7h 33m1 stop Seattle/Tacoma Intl
$411Alaska Airlines
Fri, Mar 19 - Sun, Mar 21
Delta Logo
6:00 am - 12:27 pmONT  Ontario-GTF Great Falls
5h 27m1 stop Salt Lake City
Delta Logo
1:10 pm - 4:12 pmGTF  Great Falls-ONT Ontario
4h 02m1 stop Salt Lake City
$413Delta
Booking Insights

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

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

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

Round-trip flights from Ontario to Great Falls typically range from $484 to $718. The lowest price found in the past 5 days was $358, on Delta.

Find deals

Key details for Ontario to Great Falls flights

Cheapest flight

$179
The most popular month to fly with an average 33% increase in travelers.
One-way flight from Ontario to Great Falls

When to book flights from Ontario to Great Falls

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

Your Ontario to Great Falls flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines and booking tips.

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

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

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

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

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

    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.

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

    Round-trip flights from Ontario to Great Falls range from $484 to $718, with an average of $570 over the past 12 months. Anything below $484 counts as a good deal.

  • Have flight prices from Ontario to Great Falls 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 $358 to $1,045. That means the highest observed fare was about 3x higher than the lowest one.

  • How are flight prices from Ontario to Great Falls looking right now?

    One-way fares from Ontario to Great Falls are currently in line with typical prices for this route. Average one-way fares are about $265.

  • What car rental options are available at Great Falls Airport (GTF)?

    Great Falls Airport (GTF) hosts 5 major car rental companies, with daily rates starting from around $22 for economy cars. Top options include:

    • Avis
    • Budget
    • Alamo
    • Hertz
    • Enterprise Rent-A-Car

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

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

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

    One-stop flights from Ontario to Great Falls most commonly connect through:

    • Salt Lake City (SLC) - 79% of one-stop connections
    • Denver Intl (DEN) - 17% of one-stop connections
    • Seattle/Tacoma Intl (SEA) - 4% of one-stop connections

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

    Yes. Flexible dates can save you up to 39% on flights from Ontario to Great Falls. Thursday is the cheapest departure day at $440 round-trip on average, while Wednesday is the most expensive at $718, a difference of $278.

    KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

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

    Flying via Salt Lake City (SLC) gives the shortest average 1-stop total travel time at 5h 13m, compared with 7h 32m via Denver Intl (DEN) and 12h 35m via Seattle/Tacoma Intl (SEA).

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

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

Your guide to booking Ontario to Great Falls flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates are flexible, aim for a Thursday departure and avoid flying on Wednesday. On this route, Thursday flights average $440, about $278 less than Wednesday fares (39% savings) based on the last 12 months.
  • If you can choose when to travel, plan your Ontario to Great Falls trip for July. Fares historically average $354 round-trip in that month - typically $474 less than the most expensive month, which is August (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to Great Falls Airport.

    • Crystal Inn Hotel & Suites - Great Falls
    • Holiday Inn Express & Suites Great Falls By IHG
    • Comfort Inn & Suites Market - Airport

More options for your flight from Ontario to Great Falls

Complete your trip to Great Falls with a hotel stay or car rental

Car rentals in Great Falls
Hotels in Great Falls
Vacations in Great Falls