ONT - BIL

$177 Find Cheap Flights from Ontario to Billings

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ontario to Billings departing on 5/15. 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 Billings

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Billings, 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 Ontario to Billings, as well as popular online travel agencies
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$261
Delta
Wed 4/22Fri 5/1
ONT - BIL • 1 stop
Cheapest one-way
$177
Typical prices: $248-$305
Alaska Airlines
Fri 5/15
ONT - BIL • 1 stop
Top airlines
Delta
Cheapest • from $261 (round-trip)
Alaska Airlines
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Ontario and Billings. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Salt Lake City (SLC)
Cheapest • Avg $437 (round-trip)
Salt Lake City (SLC)
Shortest trip • 4h 36m (one-way)
Insights
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Insights
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We hope you love your trip to Billings!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Ontario to Billings (ONT-BIL)

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

Wed, Apr 22 - Fri, May 1
Delta Logo
5:05 pm - 10:24 pm
ONT
-
BIL
4h 19m
1 stop
Delta Logo
6:18 pm - 11:44 pm
BIL
-
ONT
6h 26m
1 stop
$261Delta
Sat, Apr 25 - Tue, Apr 28
Delta Logo
6:00 am - 10:53 am
ONT
-
BIL
3h 53m
1 stop
Delta Logo
6:18 pm - 11:44 pm
BIL
-
ONT
6h 26m
1 stop
$262Delta
Sat, Apr 25 - Sat, Apr 25
Delta Logo
6:00 am - 10:53 am
ONT
-
BIL
3h 53m
1 stop
Delta Logo
6:18 pm - 10:43 pm
BIL
-
ONT
5h 25m
1 stop
$263Delta
Wed, May 6 - Tue, May 12
Alaska Airlines Logo
3:24 pm - 10:59 pm
ONT
-
BIL
6h 35m
1 stop
Alaska Airlines Logo
7:00 am - 2:32 pm
BIL
-
ONT
8h 32m
1 stop
$281Alaska Airlines
Thu, Jun 4 - Mon, Jun 8
Alaska Airlines Logo
4:03 pm - 11:33 pm
ONT
-
BIL
6h 30m
1 stop
Alaska Airlines Logo
7:21 pm - 11:58 pm
BIL
-
ONT
5h 37m
1 stop
$290Alaska Airlines
Wed, Apr 22 - Sun, Apr 26
Delta Logo
5:05 pm - 10:24 pm
ONT
-
BIL
4h 19m
1 stop
Delta Logo
6:18 pm - 11:44 pm
BIL
-
ONT
6h 26m
1 stop
$296Delta
Sat, Apr 25 - Sun, Apr 26
Delta Logo
6:00 am - 10:53 am
ONT
-
BIL
3h 53m
1 stop
Delta Logo
6:18 pm - 11:44 pm
BIL
-
ONT
6h 26m
1 stop
$297Delta
Tue, Apr 7 - Sat, Apr 11
Alaska Airlines Logo
7:08 pm - 11:58 pm
ONT
-
BIL
27h 50m
1 stop
Alaska Airlines Logo
12:34 pm - 8:23 pm
BIL
-
ONT
8h 49m
1 stop
$303Alaska Airlines
Thu, Jun 11 - Sun, Jun 14
Delta Logo
5:05 pm - 10:27 pm
ONT
-
BIL
4h 22m
1 stop
Delta Logo
5:45 am - 9:01 am
BIL
-
ONT
4h 16m
1 stop
$305Delta
Wed, Apr 22 - Wed, Apr 29
United Airlines Logo
5:10 am - 1:23 pm
ONT
-
BIL
7h 13m
1 stop
United Airlines Logo
2:35 pm - 8:36 pm
BIL
-
ONT
7h 01m
1 stop
$313United Airlines
Booking Insights

KAYAK's insights & trends for Ontario to Billings flights

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

Which airlines provide the cheapest flights from Ontario to Billings?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from Ontario to Billings were found on Delta ($261) and Alaska Airlines ($281).

Good to know

Low seasonApril
Cheapest flight$177
Best time to beat the crowds with an average 25% drop in price.
Most popular time to fly and prices are also 17% lower on average.
Flight from Ontario to Billings

When to book flights from Ontario to Billings

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

  • What is the cheapest flight from Ontario to Billings?

    In the last 3 days, the lowest price for a flight from Ontario to Billings was $177 for a one-way ticket and $261 for a round-trip.

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

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

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

    Ontario airport is called Ontario and the only airport in Billings is Billings Logan Intl.

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

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

  • Which airline alliances offer flights from Ontario to Billings?

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

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

    The two airlines most popular with KAYAK users for flights from Ontario to Billings are Alaska Airlines and Delta. With an average price for the route of $504 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 $342 and an overall rating of 7.9.

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

    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 Ontario to Billings.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Billings from Ontario 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 Ontario to Billings?

    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 Billings with an airline and back to Ontario with another airline. Booking your flights between Ontario and BIL 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 Ontario to Billings?

    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 Billings from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 3 airlines serving from Ontario to Billings

 
See real verified KAYAK customer reviews for airlines flying from Ontario to Billings. 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 Ontario to Billings? 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 11978 reviews
8.1Boarding
7.0Entertainment
8.5Crew
7.1Food
7.8Comfort
Airline reviews

Good as usual. Just wished my seat was assigned at online check in. Thanks anyways

8.0 ExcellentAnonymous, Mar 2026
SAN - MRY
Read more Alaska Airlines reviews

Good as usual. Just wished my seat was assigned at online check in. Thanks anyways

This was my first trip with Alaska Airlines (round trip DCA to San Diego). Despite a slight delay on the return flight, I feel compelled to post a RAVE review! I cannot praise the airline and the crew enough! Everyone was kind, professional, and courteous, every step of the way- excellent service, snacks, and entertainment! On both legs of the trip I inquired whether there were any free seating upgrades and my request were granted BOTH times! I’ve flown on other airlines where they won’t do that, even when those premium seats are empty. As a customer service professional myself, I can say I left my experience feeling like a valued customer and not just a number. I NEVER expected to praise an airline lol I’ll definitely go out of my way to fly with Alaska on future trips. Thank you for such an awesome experience!

Our flight when we finally got rerouted to a different destination than we were going was fine. But 2 days was taken out of our vacation because our flit was cancelled. We understand mechanical problems and of course don’t want to be on a plane that has mechanical problems.Wish there had been another solution.

in-flight wifi was not working well. also the cabin temperature was a bit hot.

Nice crew, healthy snacks and drinks available. Flight to Seattle was short and comfortable.

had to be rerouted due to a medical emergency onboard. Alaska crew treated the patient with utmost respect and continued to keep the passengers updated the entire way through, which I appreciate. But it took 4 hours from landing until we were able to be airborne again, causing us to not get into SFO until ~2 am. I understand it was a tough situation for everyone, but that was an indecent wait.

The plane was dirty, the seats were tiny, wasnt my favorite airline tbh

I bought tickets MONTHS ago for a flight that left SAN at 14:30. That is what it says on our tickets. I was never notified of any time changes. During online check-in. I discovered the flight time had been changed to 15:45. This was unacceptable and had I been notified, I would have changed flights, or airlines. That departure time was unworkable with our plans. We called Alaska and asked for an explanation. They said flight time was changed 11/08/25. No proof of notification could be offered. We asked to be moved to an earlier flight. After much pleading, the rep said she would allow a “one time exception..” While I appreciate being moved, this was YOUR fault Alaska Airlines.

SBP to PDX 2/17/2026. One person ahead of us at the counter. One ahead of is at TSA. First to board. First row, first class. First to be served. Food and service very good. First off the aircraft. Flight was nice other than some moderately hard bumps on climb out (please find a way to control that!). Air Force landing (none of that Navy slam you to the deck stuff). Wheel chair at the bottom of the ramp waiting for my wife. Luggage out quickly, walked right up to the parking shuttle bus. First stop on the bus. I like the EMB 175 aircraft. This was as close to a perfect flight as I will ever see. Bravo!

Santa Rosa Airport is the best! Glad to have experienced it.

Flight was delayed by 3-hours and their fix was… complimentary pretzels.

The crew, and fellow passengers, were super gracious and kind. There seemed to be plenty of bin space even though the plane was full. It’s nice to get a glass of wine with dinner in Premiere seating, and there was a lot of food.

Everything I mentioned earlier - the airbus was more comfortable indeed and the experience was further enhanced.

The plane was an older model, so it wasn’t as comfortable as others. The flight attendants were not helpful during onboarding. It was a full flight so there was chaos finding space for baggage.

Awesome! On time flight, early arrival, and a complimentary upgrade!

Delta One is extraordinary. I fly business when somebody hires me. I just wonder why there is such a chasm between business class and the insanely inhumane and nonsensical coach. The seats are not large enough to fit even my tiny wife. We fly 10% of what we did because we don’t want to pay 5-10 k but for $400 it’s unbearable. It seems like the accountants took over and made stupid decisions. Screw in 20 extra seats and make it so unbearable that people fly 90% less. Just put the damn price up and put some proper chairs in. But business, yay.

Delta’s staff is unmatched. From the gate agents, to the pilots, to the flight attendants… all top of the industry.

The flight was delayed for about 2 hrs. Other than it, it was good.

I am extremely disappointed that delta internal pilot manuals now refer to the Gulf of Mexico as the “gulf of America”. You can bow down to the Orange turd on your own. I will never fly delta again

No lunch on a x-country flight scheduled for 10:50 am departure, arrived 5+ hrs later. That requires a black box label before you pay for the tickets. Worst, when I checked in online, it's specifically said that lunch was served on his flight for economy Plus passengers.

Staff were good. My seat was in need of repair, but for a short flight was not problematic. Usual basic snack and drink setup that you'll find on any US carrier. Over, a decent, basic flight.

Complimentary light meal would be appreciated. But great flight crew service on all legs

Flight delayed for more than 16 hrs and no effort was spent to provide an alternate

Women boarding passengers at the gate was absolutely rude and disrespectful of passengers. The flight attendant was absolutely delightful! Smiling and connected with the passengers. So happy. The seats are cramped and uncomfortable but I guess that’s just the way it is Communication regarding flight was excellent

it was a very short flight so my expectations were low.

Very disappointing given gate agent behavior. Filed a formal complaint with United.

Crew was great (professional, attentive, prompt). Snacks for 4 hrs flight is deplorable.

Flight delayed. WiFi connectivity very poor if not existant. Last minute arrival forced me to run to catch my connection.

Terrible. No customer service, no food, no drinks on a 6 hour premier economy booking.

It was a pretty standard flight... until the almost hour and a half spent on the taxi way. I get that the weather has been poor but the delay had nothing to do with the weather and more to do with a plane with several issues tying up the gate. I get that that happens from time to time but this has been EVERY flight I've been on for the past 5 years and I fly 3 to 5 times a year. This isn't just United... it's American, it's Delta. It's an issue with the entire industry. I work for UPS and packages on a cargo plane get better service than people do these days. Anymore I HATE flying.

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

Information on your arrival and departure airports