BIL - ONT

$268 Find Cheap Flights from Billings to Ontario

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Billings to Ontario departing on 6/4. 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.
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These are the airlines KAYAK users have selected most often from within our search results in flight searches from Billings 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 Billings to Ontario, as well as popular online travel agencies
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Flights Deals

Cheap Flight Deals from Billings to Ontario (BIL-ONT)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Billings 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.

Recent round-trip flight deals from Billings to Ontario

KAYAK's recommended round-trip deals from the most popular airlines that fly from Billings to Ontario.
Discover the best prices for you by selecting your travel dates on KAYAK.
Delta Logo
5:20 am - 9:11 amBIL-ONT
4h 51m1 stop
Delta Logo
5:08 pm - 12:12 amONT-BIL
6h 04m1 stop
$268Delta
Find Deal
Wed, Jun 4 - Tue, Jun 10
Delta Logo
5:20 am - 2:15 pmBIL-ONT
9h 55m2 stops
Delta Logo
5:08 pm - 12:12 amONT-BIL
6h 04m1 stop
$273Delta
Find Deal
Wed, Jun 4 - Tue, Jun 10
Hawaiian Airlines Logo
6:05 am - 10:57 amBIL-ONT
5h 52m1 stop
Hawaiian Airlines Logo
6:00 am - 3:05 pmONT-BIL
8h 05m1 stop
$281Hawaiian Airlines
Find Deal
Wed, May 28 - Sun, Jun 1
Delta Logo
5:45 am - 9:06 amBIL-ONT
4h 21m1 stop
Delta Logo
5:05 pm - 10:32 pmONT-BIL
4h 27m1 stop
$291Delta
Find Deal
Fri, Oct 3 - Mon, Oct 6
Alaska Airlines Logo
7:24 pm - 10:57 amBIL-ONT
16h 33m1 stop
Alaska Airlines Logo
4:45 pm - 11:59 pmONT-BIL
6h 14m1 stop
$324Alaska Airlines
Find Deal
Tue, May 27 - Sat, May 31
United Airlines Logo
4:16 pm - 9:04 pmBIL-ONT
5h 48m1 stop
United Airlines Logo
5:10 am - 1:17 pmONT-BIL
7h 07m1 stop
$325United Airlines
Find Deal
Tue, Jun 3 - Sat, Jun 7
United Airlines Logo
2:38 pm - 10:45 pmBIL-ONT
9h 07m2 stops
United Airlines Logo
5:10 am - 1:17 pmONT-BIL
7h 07m1 stop
$330United Airlines
Find Deal
Wed, May 28 - Sun, Jun 1
Alaska Airlines Logo
6:05 am - 10:46 pmBIL-ONT
17h 41m1 stop
Alaska Airlines Logo
4:45 pm - 11:59 pmONT-BIL
6h 14m1 stop
$361Alaska Airlines
Find Deal
Fri, May 23 - Fri, May 30
American Airlines Logo
1:58 pm - 9:58 pmBIL-ONT
9h 00m1 stop
American Airlines Logo
12:59 am - 1:26 pmONT-BIL
11h 27m1 stop
$699American Airlines
Find Deal
Wed, Jun 4 - Mon, Jun 9
American Airlines Logo
7:13 am - 6:23 pmBIL-ONT
12h 10m2 stops
American Airlines Logo
12:59 am - 9:55 pmONT-BIL
19h 56m1 stop
$704American Airlines
Find Deal
Wed, Jun 4 - Mon, Jun 9
Useful Info

KAYAK's insights & trends for Billings to Ontario flights

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

What’s the cheapest day of the week to fly from Billings to Ontario?

The average price of all round-trip flights from Billings to Ontario clicked on KAYAK for each day over the last 12 months.

For Billings to Ontario, Monday is the cheapest day to fly on average and Friday is the most expensive. Flying from Ontario back to Billings, the best deals are generally found on Friday, with Monday being the most expensive.

What is the cheapest month to fly from Billings to Ontario?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Billings to Ontario, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Billings to Ontario is November, where tickets cost $255 (return) on average. On the other hand, the most expensive months are July and December, where the average cost of round-trip tickets is $607 and $494 respectively.

Good to know

Low seasonFebruary
High seasonOctober
Cheapest flight$268
Best time to beat the crowds with an average 29% drop in price.
Most popular time to fly and prices are also 28% lower on average.
Flight from Billings to Ontario

When to book flights from Billings to Ontario

Are your dates flexible? Find out the best times to travel from Billings 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 Billings to Ontario

  • What is the cheapest flight from Billings to Ontario?

    In the last 3 days, the lowest price for a flight from Billings to Ontario was $517 for a one-way ticket and $268 for a round-trip.

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

    No, a passport isn't needed to fly from Billings to Ontario. However, local authorities might ask for an official ID.

  • Which aircraft models fly most regularly from Billings to Ontario?

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

  • Which airline alliances offer flights from Billings to Ontario?

    Star Alliance, oneworld, and SkyTeam are the airline alliances operating flights between Billings and Ontario, with oneworld being the most commonly used for this route.

  • Which is the best airline for flights from Billings to Ontario, Alaska Airlines or Delta?

    The two airlines most popular with KAYAK users for flights from Billings to Ontario are Alaska Airlines and Delta. With an average price for the route of $303 and an overall rating of 8.0, Alaska Airlines is the most popular choice. Delta is also a great choice for the route, with an average price of $368 and an overall rating of 8.0.

  • How does KAYAK find such low prices on flights from Billings 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 Billings to Ontario.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ontario from Billings 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 Billings 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 Billings with another airline. Booking your flights between Billings 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 Billings 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 Billings up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Top airlines flying from Billings to Ontario

 
See real verified KAYAK customer reviews for airlines flying from Billings 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 Billings 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.
8.0
Alaska AirlinesOverall score based on 9985 reviews
8.5Crew
8.1Boarding
7.1Food
7.1Entertainment
7.9Comfort
Airline reviews

Boarding was quick and easy as always the crew is on their game as always I always have an enjoyable flight so I’m good.

10.0 ExcellentAnonymous, Apr 2025EUG - LAX
Read more Alaska Airlines reviews

Boarding was quick and easy as always the crew is on their game as always I always have an enjoyable flight so I’m good.

Need to get on train for second flight it’s much nicer when all the gates are together for obvious reasons

Cramped, crowded aircraft. Poorly organized boarding. Tasteless crackers to eat. 40 minutes late. A standard US air travel experience.

It was my first time flying Alaska Airlines and first time flying from Santa Rosa airport. The staff was very professional and friendly. Their instructions were clear and any question was answered satisfactorily. My seat was comfortable and the in-flight beverage service very adequate for the duration of the flight. We arrived ahead of the scheduled landing time and deplaning was simple. I look forward to flying with Alaska again.

Flight attendant took my carefully folded coat and flung it across the aisle to the bin across the way. Where one of the passengers rescued it for me, because that just wasn’t right!!

the flight was delayed twice and then delayed from taking off.

Crew was very good. Problem was not Alaska Airlines’ fault, there was a horrible, squealing, screaming kid near me.

This was my first trip in years with Alaska. I don’t think I’ll do it again. The planes are old and tired looking. The seats are small with zero legroom. The JFK terminal is one of the worst I’ve been in. On this flight the pilot had to abort the landing and circle the Bay before trying again. I think I’ll stick with the usual suspects …

Flight was over an hour late, and we got notified every 15 minutes, beginning right at boarding, that it would only be 15 more minutes until we finally left about 75 minutes late. Of course, no compensation was offered.

flight took off over an hour and a half late and there was no beverage service during the flight

This had nothing to do with Delta… The flights were on time and flawless. The service was excellent. We purchased seats in (aisle/middle) comfort plus since this was a cross country flight. Unfortunately, the woman seated at the window was 300+ pounds and, as might be expected, covered up about a third of the middle seat also. there was absolutely nothing that Delta could have done about that… I just don’t know what the answer should be. If you purchase a seat, you should should be able to use the entire seat and not just the portion that someone else is not sitting/oozing in. Disappointing…there should be something that could be done….I'm just not sure what solution could be.

Seats are much much more comfortable than United, which is what I usually fly

If I pay extra for "comfort+" I expect leg room where I can stretch my legs. I was seated with an attendant's seat blocking my feet. Knee space was fine but my feet had less room than the non-"comfort+" seats. Also, don't go cheap on food when you have flights of 3+ hours. It's insulting.

Only one side of the heafphone jack work. Crew was friendly and helpful.

Great. Flight departed early and arrived early. Deplaning and baggage claim ww were quick.

They separated our seats and moved us to the back of the plane. Hundreds of dollars and thousands of miles used and this was my platinum member experience.

Nothing unusual. It was fine. I hate having to pay extra for my seat.

AC barely worked on a 50 minute flight. It was very warm the whole flight. Flight was very bumpy and hard landing.

Got on the plane and then needed to deboard the plane because they didn’t have any pilots?

The flight was canceled two hours before departure, it took over five hours to rebook us on another flight.

Everything you need to know for your flight from Billings to Ontario

Information on your arrival and departure airports

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