ONT - BIL

$165 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 9/26. 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 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
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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

Mon, Sep 8 - Mon, Sep 15
Hawaiian Airlines Logo
3:06 pm - 12:11 amONT-BIL
8h 05m1 stop
Hawaiian Airlines Logo
7:18 pm - 12:03 amBIL-ONT
5h 45m1 stop
$240Hawaiian Airlines
Find Deal
Tue, Oct 14 - Sat, Oct 18
Hawaiian Airlines Logo
7:10 am - 1:19 pmONT-BIL
5h 09m1 stop
Hawaiian Airlines Logo
7:15 pm - 12:03 amBIL-ONT
5h 48m1 stop
$259Hawaiian Airlines
Find Deal
Fri, Sep 12 - Mon, Sep 15
Alaska Airlines Logo
3:06 pm - 12:11 amONT-BIL
8h 05m1 stop
Alaska Airlines Logo
7:18 pm - 12:03 amBIL-ONT
5h 45m1 stop
$284Alaska Airlines
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Wed, Sep 17 - Sun, Sep 21
Delta Logo
4:40 pm - 10:35 pmONT-BIL
4h 55m1 stop
Delta Logo
5:25 am - 8:57 amBIL-ONT
4h 32m1 stop
$285Delta
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Mon, Sep 8 - Mon, Sep 15
 Logo
6:00 am - 6:55 pmONT-BIL
11h 55m1 stop
 Logo
9:33 pm - 7:54 pmBIL-ONT
23h 21m2 stops
Thu, Sep 18 - Sat, Sep 20
Delta Logo
4:40 pm - 10:35 pmONT-BIL
4h 55m1 stop
Delta Logo
6:19 pm - 10:41 pmBIL-ONT
5h 22m1 stop
$310Delta
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Sat, Sep 6 - Wed, Sep 10
United Airlines Logo
1:15 pm - 8:34 pmONT-BIL
6h 19m1 stop
United Airlines Logo
7:00 am - 12:32 pmBIL-ONT
6h 32m1 stop
$330United Airlines
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Fri, Sep 12 - Mon, Sep 15
Alaska Airlines Logo
7:10 am - 12:11 amONT-BIL
16h 01m2 stops
Alaska Airlines Logo
7:18 pm - 12:03 amBIL-ONT
5h 45m1 stop
$337Alaska Airlines
Find Deal
Sun, Sep 21 - Wed, Sep 24
United Airlines Logo
5:10 am - 1:17 pmONT-BIL
7h 07m1 stop
United Airlines Logo
7:00 am - 8:33 pmBIL-ONT
14h 33m2 stops
$420United Airlines
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Wed, Oct 22 - Mon, Oct 27
 Logo
1:15 pm - 8:49 pmONT-BIL
6h 34m1 stop
 Logo
3:40 pm - 11:56 pmBIL-ONT
9h 16m1 stop
$1,242
Find Deal
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.

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

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

If your flying dates are flexible, you should consider flying to Billings on a Friday, as we generally find the cheapest rates on that day for this route. On the other hand, Monday is the most expensive day to fly from Ontario to Billings. For your return ticket, we recommend flying on a Monday and avoiding Fridays for the best deals.

Good to know

Low seasonOctober
Cheapest flight$165
Best time to beat the crowds with an average 28% drop in price.
Most popular time to fly and prices are also 22% 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 $165 for a one-way ticket and $240 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?

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

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

    The two airlines most popular with KAYAK users for flights from Ontario to Billings are Delta and Alaska Airlines. With an average price for the route of $311 and an overall rating of 8.0, Delta is the most popular choice. Alaska Airlines is also a great choice for the route, with an average price of $375 and an overall rating of 8.0.

  • 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 10000 reviews
7.0Entertainment
7.1Food
8.1Boarding
8.5Crew
7.8Comfort
Airline reviews

Wheelchair assistance was provided in Seattle and was very gratefully accepted. Thank you to the Alaska staff.

10.0 ExcellentMichael, Aug 2025SEA - BIL
Read more Alaska Airlines reviews

Wheelchair assistance was provided in Seattle and was very gratefully accepted. Thank you to the Alaska staff.

We were singled out, greeted and helped with check-in at the busy airport. They offered to take our bags there and gave no fuss when we said they were carry-on. With United just last week I had to put up a fight just to get onto the flight with my one authorized carry-on.

Seats extremely uncomfortable, no entertainment, no snacks, and when boarding, half of the passengers needed to check in the carry on luggage without any explanation.

I liked the crew. There was no food flight to short

Short flight was fine, but no entertainment and bathrooms broken.

2 FLIGHT DELAYS? what an inconvenience to stay @the airport HALF THE DAY😳from 1pm till boarding @ 4pm pass 😠exhausting !

boarding was late worst was going back LAX to SFO delayed not once ? but TWICE😡I was at the airport practically almost 5 hours of previous time , very inconvenient! i would have spend longer time with family , I was wanting to avoid TSA line? but it just got me to spend unwanted time @ d airport

You no longer give receipts for baggage at the counter. And it is next to impossible to get it on your webpage. Spent 20 min trying and gave up... I need receipt to submit for reimbursement and don't have time to waste on your poor webpage Disappointing .....

The flight was jumping between being delayed and closer to schedule about 5 times. Alaska air website showed incorrect times while google had latest info. This panic was horrible to deal with.

Flight was delayed - we left at 11:30 pm instead of 10:30 and it was extremely inconvenient. It affected both the day of the flight and the next day

My husband upgraded our seats and I don't know if it was due to the type of planet was or if they didn't upgrade our seats. We were supposed to be in I believe comfort seats and they were just as tight as any other seat- no leg room and we are very tall people but at least it wasn't extremely cold. My husband did put in a complaint about our seating because he paid extra and if we would have known that the space and the tightness would have been the same, we just would have gotten the emergency row emergency row seats that we normally get. We love Delta but both our flights coming home we're not good. Oh I forgot to mention that on our flight to Hawaii our luggage wheels got broke and we had to purse new luggage on vacation then we never had this problem so we didn't know protocol and reported it after we got home only for them to tell is we only had 24hrs to report the damage. Not sure what was going on with Delta this vacation trip.

Crew was excellent. Comfort seats not as nice as other kinds of planes.

It was a great flight and the stewards and stewardess were all kind and accommodating!! The seats were comfortable and entertainment screen excellent!

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

There was a security issue at the airport and we were unable to land. We circled endlessly and then landed at another airfield for fuel. We then circled the airport again, almost landed but didn’t fully touch down before circling again. I am thankful to the crew for keeping us safe- the issue was the airline and staff at the airport getting us seats on our connecting flights. That part was hours of searching for someone and getting in double my steps.

Most aspects were good however if they assign boarding zones they ought to enforce them or why bother? My luggage from SAN-JFK-MAD was lost in NY so I without my main bag for two days upon arrival in Spain. They were helpful in tracking it and eventually delivered it to my hotel. The flub was because of a delay upon arrival in NYC. I had booked 2 1/2 hours between flights but we had to hold on the taxiway for an hour after landing while waiting for a clear gate which likely caused the baggage error.

Excellent flight, the planes were newer, they did a nice job with boarding, great service overall.

It would be nice if was given wires ear buds. Overall was a good experience was able to sleep on the plane

737-800 in first class was pretty dumpy. Seat had an uncomfortable angle, storage under the seat was blocked so even my very modest backpack didn't fit, power outlet was flaky. Weird tiny seat pockets that couldn't hold a gallon ziploc bag, emesis bag missing, etc. etc. No in-flight service due to turbulence. Crew was excellent, boarding was smooth despite a full flight.

Delta flight was on time, seats were comfortable, and crew was nice.

Stuck on tarmac for two hours plus a 5.5 hour flight. Rude flight attendant. And no meals, not even for purchase!

I learned that seating towards the end of plane that a line forms for the restroom and people use your chair as a hand railing, bumping your seat consistently. I was seated in the aisle. I think that next time if I am towards the back row I would want to sit in the middle or window seat.

United sent me a mileage plus number last year but that number is invalid so I can’t use it to check into flights or collect mileage. There is human to speak about the problem, only computers who keep asking me if I am using the correct email. It’s so frustrating and I cannot resolve it.

Not a great experience. We paid for the upgrade for premium economy seats and seated ourselves in very comfortable seats. Someone came along with the same seat on their boarding pass. The aircraft had been changed and as a result we were booted out and sent further back to small uncomfortable seats. After complaining we were moved to emergency row seats, which gave us more leg room but the seats don’t recline. For people in our 70’s we found having to sit upright from California to NJ very uncomfortable. Not sure why they chose to move senior citizens instead of the two people that were allowed to take the more comfortable seats. Not happy.

Everything was great. Only thing that could’ve made it better was buy on board options for hot food, but the snacks were decent. The flight attendants were great. I had no complaints. I was able to make it to my destination safely

Boarded plane and then delayed 1.5 hours while on the plane

Horrific. They missed my connecting flight to San Diego. I didn’t get there until Monday at 9am when I had a mandatory court settlement conference scheduled at 6am since we had parties on the east coast. This caused many issues. All because United apparently forgot to hold the doors open until my flight landed that only had a 10 minute delay. This was the last flight to Southern California. So I couldn’t even rent a car to finish the trip. United cannot be trusted when traveling on specific days and times since weather didn’t have anything to do with the delays.

Really good 😊 the woman at the gate entrance was a little rude checking in our carry-on but i dont think she worked for the airline, she worked for the airport at sacramento, other than that amazing.

it was so bad. I tried to board my flight from vancouver to saskatoon. And to my surprise they did not board me cause the flight was changed and no email was send to me. and on my boarding pass which i got from seattle says different flight. I did not knew anyone from Vancouver, air canada crew was rude, i asked for today flight but they were rude and i had early morning dental appointment in saskatoon. I was so much in pain and my whole day is wasted today. and i suffered alot. They did provide me hotel but they did not provide me any food. I am really really disappointed first time had so bad experience with air canada. I may think twice to book it again. If i can get any reply or any composition that would be great. Thanks

Very comfortable (upgraded to business class). The audio on my screen didn’t work, but I managed to play the audio through my phone while watching the screen.

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