BIL - ONT

$120 Find Cheap Flights from Billings 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 Billings to Ontario departing on 10/30. 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

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

Recent round-trip flight deals from Billings to Ontario

Thu, Oct 2 - Mon, Oct 6
Hawaiian Airlines Logo
6:00 am - 10:44 amBIL-ONT
5h 44m1 stop
Hawaiian Airlines Logo
7:10 am - 1:19 pmONT-BIL
5h 09m1 stop
$309Hawaiian Airlines
Find Deal
Fri, Oct 3 - Mon, Oct 6
Hawaiian Airlines Logo
7:18 pm - 12:03 amBIL-ONT
5h 45m1 stop
Hawaiian Airlines Logo
7:10 am - 1:19 pmONT-BIL
5h 09m1 stop
$322Hawaiian Airlines
Find Deal
Mon, Aug 18 - Sun, Aug 24
Alaska Airlines Logo
7:17 pm - 12:15 amBIL-ONT
5h 58m1 stop
Alaska Airlines Logo
6:00 am - 3:03 pmONT-BIL
8h 03m1 stop
$325Alaska Airlines
Find Deal
Mon, Sep 22 - Wed, Oct 1
Alaska Airlines Logo
6:00 am - 10:44 amBIL-ONT
5h 44m1 stop
Alaska Airlines Logo
3:04 pm - 6:38 pmONT-BIL
26h 34m1 stop
$331Alaska Airlines
Find Deal
Fri, Oct 3 - Mon, Oct 6
Delta Logo
5:25 am - 8:57 amBIL-ONT
4h 32m1 stop
Delta Logo
5:05 pm - 10:32 pmONT-BIL
4h 27m1 stop
$339Delta
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Mon, Jul 14 - Fri, Jul 18
Delta Logo
5:20 am - 8:47 amBIL-ONT
4h 27m1 stop
Delta Logo
5:09 pm - 12:07 amONT-BIL
5h 58m1 stop
$351Delta
Find Deal
Fri, Oct 3 - Mon, Oct 6
United Airlines Logo
2:30 pm - 8:24 pmBIL-ONT
6h 54m1 stop
United Airlines Logo
1:53 pm - 10:46 pmONT-BIL
7h 53m2 stops
$358United Airlines
Find Deal
Mon, Sep 22 - Wed, Oct 1
United Airlines Logo
4:15 pm - 8:43 pmBIL-ONT
5h 28m1 stop
United Airlines Logo
9:36 am - 8:49 pmONT-BIL
10h 13m2 stops
$386United Airlines
Find Deal
Fri, Oct 3 - Mon, Oct 6
American Airlines Logo
7:03 am - 6:16 pmBIL-ONT
12h 13m2 stops
American Airlines Logo
4:49 pm - 1:22 pmONT-BIL
19h 33m2 stops
$477American Airlines
Find Deal
Mon, Jul 14 - Thu, Jul 17
American Airlines Logo
2:00 pm - 10:10 pmBIL-ONT
9h 10m1 stop
American Airlines Logo
12:59 am - 10:11 pmONT-BIL
20h 12m1 stop
$912American Airlines
Find Deal
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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$120
Best time to beat the crowds with an average 29% drop in price.
Most popular time to fly and prices are also 29% 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 $120 for a one-way ticket and $309 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?

    SkyTeam, Star Alliance, and oneworld 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.

Reviews of the 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 10000 reviews
7.8Comfort
7.1Entertainment
8.1Boarding
8.5Crew
7.1Food
Airline reviews

It was very good and comfortable, Crew was also great

10.0 ExcellentAnonymous, Jun 2025SEA - BUR
Read more Alaska Airlines reviews

It was very good and comfortable, Crew was also great

Good experience, although it was a little cramped being a tall person. Otherwise everything went smoothly and professionally though

Delay of more than 3 hours I didnt recieve neither a voucher for food Attention disaster

I'm a platinum member with American Airlines, however, my ticket did not display status and thus I did not board with an early group. I traveled with my two daughters and we were given a row of seats that did not recline. Not the treatment I would have expected for a platinum customer. The flight was also a bit late leaving Portland. Also on my flight to Portland we were not given premium seats. In fact, we were in the last row of the aircraft.

The seats in first class are very dated and quite uncomfortable. I don’t need lie-flat seats for a 6 hour flight, but more recline is really necessary.

One of the stewardess, Tre, went above and beyond to ensure my comfort!

Alaska app and website had numerous problems so couldn’t get boarding passes or check seats

Flight was very warm. It felt like there was no working AC.

Big delay of over 7 hours on next leg of trip with Alaska. Would have been nice to have food or something

Very good. Gate personnel were excellent flight attendants were also able to change my seat at the last minute everyone, courteous, polite, and.

Not a "Delta" issue, but a JFK issue: We booked a connecting flight with 3 1/2 hours between to clearn immigration and customs. Our inbound flight (BCN to JFK) was on the taxiway 45 minutes which ate into our layover time. Immigtration was insanely quick with the CBP MPC app; however, clearing TSA (again, after we were ALREADY cleared in Spain on the inbound international flight) took over 95 minutes. This left us with 10 minutes before boarding the connecting flight (JFK to SAN) to walk to the far end of Terminal 4 and try to find food. We didn't find any food that could promise to serve us in under 10 minutes so we boarded the Delta flight after coming off a plance and an 8-hour flight knowing that we wouldn't be served any food on the next 5 1/2 hour flight. I feel like Delta needs to put pressure on the JFK TSA to open more screening stations (by our count, we saw only 5 scanners open and a line of - as we said - over 90 minutes. The insult is that we WERE ALREADY SCREENED through TSA, but as you come off one flight into the USA, you have to go through the whole process again. It seems like if you have a connecting flight, there should be a way to pass through immigration and customs without needing to return through TSA.

There are 4 flights in consecutive gates with about the same departure time. Two flights were boarding at the same time. One was delayed or boarding would be happening at the same time. I am not sure what Delta and LAX need to do to have a better layout at the end of Terminal 2

5 hours of delay that could've been much shorter if Delta had taken the 1 hour delay they imposed on the flight before boarding to run any of the plane checks required for flight to find the hydraulic issue that required nearly 3 hours to fix. $24 of meal credit buys a sandwich and a soft drink. Poor communication within the terminal about what gate we'd be re-boarding from and when we'd be re-boarding.

The entertainment and wifi mostly didn't work on this flight.

Terrible entertainment system - kept freezing and audio kept cutting out. Snacks were mediocre at best for a 5 hour flight.

I am still upset that my bag was lost on a recent trip to Rome ; we were inconvenienced and out €150 Euros ; delta has refused to reimburse us

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.

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

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