GTF - ONT

$187 Find Cheap Flights from Great Falls to Ontario

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Great Falls to Ontario departing on 2/4. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Ontario

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Great Falls to Ontario, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Great Falls to Ontario, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$294
Alaska Airlines
Sat 2/28Sat 3/7
GTF - ONT • 1 stop
Cheapest one-way
$187
Alaska Airlines
Wed 2/4
GTF - ONT • 2 stops
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We hope you love your trip to Ontario!
Flight Deals
Booking Insights
Flight Deals

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

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Great Falls to Ontario that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Great Falls to Ontario

Sat, Feb 28 - Sat, Mar 7
Alaska Airlines Logo
6:28 pm - 11:32 pm
GTF
-
ONT
6h 04m
1 stop
Alaska Airlines Logo
6:14 am - 5:48 pm
ONT
-
GTF
10h 34m
1 stop
$294Alaska Airlines
Tue, Mar 3 - Thu, Mar 5
Alaska Airlines Logo
4:57 pm - 10:44 pm
GTF
-
ONT
6h 47m
1 stop
Alaska Airlines Logo
6:14 am - 4:17 pm
ONT
-
GTF
9h 03m
1 stop
$348Alaska Airlines
Tue, Mar 3 - Thu, Mar 5
Alaska Airlines Logo
4:57 pm - 10:44 pm
GTF
-
ONT
6h 47m
1 stop
Alaska Airlines Logo
6:08 pm - 4:17 pm
ONT
-
GTF
21h 09m
2 stops
$364Alaska Airlines
Mon, Mar 30 - Mon, Apr 6
Alaska Airlines Logo
5:06 pm - 9:39 am
GTF
-
ONT
17h 33m
1 stop
Alaska Airlines Logo
7:08 pm - 4:26 pm
ONT
-
GTF
20h 18m
1 stop
$368Alaska Airlines
Wed, Feb 11 - Sat, Feb 14
United Airlines Logo
2:29 pm - 8:58 pm
GTF
-
ONT
7h 29m
1 stop
United Airlines Logo
1:45 pm - 9:33 pm
ONT
-
GTF
6h 48m
1 stop
$388United Airlines
Sat, Feb 28 - Sat, Mar 7
Alaska Airlines Logo
6:28 pm - 11:32 pm
GTF
-
ONT
6h 04m
1 stop
Alaska Airlines Logo
7:00 am - 5:48 pm
ONT
-
GTF
9h 48m
2 stops
$407Alaska Airlines
Wed, Feb 11 - Sat, Feb 14
Alaska Airlines Logo
5:59 pm - 6:57 pm
GTF
-
ONT
25h 58m
2 stops
Alaska Airlines Logo
6:14 am - 5:48 pm
ONT
-
GTF
10h 34m
1 stop
$427Alaska Airlines
Fri, Apr 17 - Tue, Apr 21
Alaska Airlines Logo
5:06 pm - 11:59 pm
GTF
-
ONT
7h 53m
1 stop
Alaska Airlines Logo
6:00 am - 4:26 pm
ONT
-
GTF
9h 26m
1 stop
$438Alaska Airlines
Wed, Feb 11 - Sat, Feb 14
United Airlines Logo
2:29 pm - 8:58 pm
GTF
-
ONT
7h 29m
1 stop
United Airlines Logo
1:45 pm - 9:33 pm
ONT
-
GTF
6h 48m
1 stop
$446United Airlines
Sun, May 31 - Sun, Jun 7
Alaska Airlines Logo
6:52 pm - 11:58 pm
GTF
-
ONT
6h 06m
1 stop
Alaska Airlines Logo
12:01 pm - 6:12 pm
ONT
-
GTF
5h 11m
1 stop
$452Alaska Airlines
Booking Insights

KAYAK's insights & trends for Great Falls to Ontario flights

Get data-powered insights and trends into flights from Great Falls to Ontario to help you find the cheapest flights, the best time to fly and much more.

Which airlines fly non-stop between Great Falls and Ontario?

Airline and price data is aggregated from results in KAYAK’s search results from the last 2 weeks for round-trip flights from Great Falls to Ontario.

There is just one airline that flies from Great Falls to Ontario direct and that is Delta. The best round-trip deal found from Delta for the route is $203.

Good to know

Cheapest flight$187
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
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Great Falls to Ontario

  • What is the cheapest flight from Great Falls to Ontario?

    In the last 3 days, the lowest price for a flight from Great Falls to Ontario was $187 for a one-way ticket and $294 for a round-trip.

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

    A passport is not required to fly from Great Falls to Ontario.

  • Which airports will I be using when flying from Great Falls to Ontario?

    Great Falls and Ontario are both served by 1 main airport. You will leave Great Falls from Great Falls and will be arriving at Ontario.

  • Which aircraft models fly most regularly from Great Falls to Ontario?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Great Falls to Ontario?

    SkyTeam is the only airline alliance operating flights between Great Falls and Ontario.

  • How does KAYAK find such low prices on flights from Great Falls to Ontario?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Great Falls to Ontario.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Great Falls to Ontario?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ontario from Great Falls is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Great Falls to Ontario?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Ontario with an airline and back to Great Falls with another airline. Booking your flights between Great Falls and ONT can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Great Falls to Ontario?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Ontario from Great Falls up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Great Falls to Ontario

 
See real verified KAYAK customer reviews for airlines flying from Great Falls to Ontario. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Great Falls to Ontario? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
DeltaOverall score based on 8048 reviews
7.9Comfort
7.2Food
8.1Boarding
8.5Crew
7.8Entertainment
Airline reviews

I usually get upgraded so my experience is usually amazing. I did not get upgraded this time - which was fine - but the wifi had issues, the monitors were going in & out, & (though not Delta's fault) one of the gentlemen next to me desperately needed a shower.

4.0 OkayLauren, Jan 2026
ATL - SFO
Read more Delta reviews

I usually get upgraded so my experience is usually amazing. I did not get upgraded this time - which was fine - but the wifi had issues, the monitors were going in & out, & (though not Delta's fault) one of the gentlemen next to me desperately needed a shower.

I really liked the legroom. I am 6’4”.a at For some reason our seats were not together and using the app to fix it didn’t work. Passengers were nice enough to move for us but you should absolutely ensure a parent sits with their child.

Staff were friendly and happy. Delta could make sure passengers that don't have the app know of changes. Without Kayak I would not have known about the change of gate or the delay. Kayak was faster to notify me.

They changed planes and the new plane couldn’t carry enough fuel to fly across the country so we had to stop in Kansas City to refuel. Flight was delayed .

Flight was too crowded and seats are too small, especially since passengrs are getting larger. Having a middle seat is ALWAYS tough! Woman on my left was large & kept creeping in to my space. Flight personnel were great! Have more savory rather than sweet snacks please.

The crew took good care of us. The flight from ATL to SFO is a longer one, and there were multiple beverage offerings. I like the 757's that Delta uses. Good airplane that is comfortable. I do wish Delta would separate Priority boarding from the better seats. I would gladly take a smaller seat in an open row than be jammed into Comfort just to get priority boarding, just to make sure I don't have to check a bag.

Gate agent rushed to fill hot jetway with crowd so it took over 12 minutes to go from gate to plane. Just like a discount airline Pooly prepared cabin and third time that claim of rough air prevented any cabin service. Friends on a Southwest flight at similar time had service.

I was uncomfortably cold on the plane. Other than that it was uneventful and therefore as enjoyable as a plane ride can be.

Food was surprisingly good but the WiFi was not great

My flight was extremely cold. I had a jacket and a cover was left in each seat. The cover was extremely thin and I have a disability, fibromyalgia and arthrithis and AC air is the worst. I closed my vent and my husbands vent and it still was frigid. I asked the attendant if I could get another cover and she quickly almost dismissively and totally unconcerned stating, (I quote) (one per chair) and walked off so quickly that I didn't get a chance to explain to her that I literally have adisability. I didnt want to make a seen so I set on that flight for over 5 hours in pain, joints locking up and extremely uncomfortable. When my fibromyalgia flares up my joints not only ache but they will lock up also and it takes me days to get back to my regular self even though I take medication for it. I felt like it would not have hurt anyone at all for her to just give me an extra cover because I'm sure they have all types of medical issues in people that fly every day.

Everything you need to know for your flight from Great Falls to Ontario

Information on your arrival and departure airports