ONT - BIL

$130 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 1/27. 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
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Everything you should know

Cheapest round-trip
$273
Delta
Wed 1/7Sun 1/11
ONT - BIL • 1 stop
Cheapest one-way
$130
Alaska Airlines
Tue 1/27
ONT - BIL • 1 stop
Top airlines
Delta
Cheapest • from $273 (round-trip)
Alaska Airlines
Best reviews • 8.0 score
Airline reviews
Airline reviews
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+1
Airline reviews
Airline reviews
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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, Jan 7 - Sun, Jan 11
Delta Logo
6:00 am - 11:06 amONT-BIL
4h 06m1 stop
Delta Logo
6:10 pm - 1:56 pmBIL-ONT
20h 46m2 stops
$273Delta
Find Deal
Wed, Jan 7 - Sun, Jan 11
Alaska Airlines Logo
4:03 pm - 11:36 pmONT-BIL
6h 33m1 stop
Alaska Airlines Logo
2:02 pm - 10:59 amBIL-ONT
21h 57m1 stop
$274Alaska Airlines
Find Deal
Wed, Jan 7 - Sun, Jan 11
Delta Logo
7:30 am - 5:30 pmONT-BIL
9h 00m2 stops
Delta Logo
6:10 pm - 1:56 pmBIL-ONT
20h 46m2 stops
$276Delta
Find Deal
Thu, Jan 29 - Mon, Feb 2
Alaska Airlines Logo
4:03 pm - 11:36 pmONT-BIL
6h 33m1 stop
Alaska Airlines Logo
2:02 pm - 3:08 pmBIL-ONT
26h 06m1 stop
$284Alaska Airlines
Find Deal
Thu, Jan 29 - Mon, Feb 2
Alaska Airlines Logo
6:00 am - 2:55 pmONT-BIL
7h 55m1 stop
Alaska Airlines Logo
3:35 pm - 11:56 pmBIL-ONT
9h 21m2 stops
$298Alaska Airlines
Find Deal
Fri, Jan 9 - Sun, Jan 11
Alaska Airlines Logo
4:03 pm - 1:22 pmONT-BIL
20h 19m2 stops
Alaska Airlines Logo
3:35 pm - 8:10 pmBIL-ONT
5h 35m1 stop
$312Alaska Airlines
Find Deal
Wed, Dec 10 - Mon, Dec 15
Alaska Airlines Logo
7:10 am - 1:22 pmONT-BIL
5h 12m1 stop
Alaska Airlines Logo
6:00 am - 11:19 amBIL-ONT
6h 19m1 stop
$370Alaska Airlines
Find Deal
Sat, Dec 13 - Mon, Dec 15
Delta Logo
12:40 pm - 11:26 pmONT-BIL
9h 46m2 stops
Delta Logo
6:22 pm - 11:58 pmBIL-ONT
6h 36m1 stop
$391Delta
Find Deal
Fri, Jan 9 - Sun, Jan 11
Alaska Airlines Logo
1:46 pm - 11:36 pmONT-BIL
8h 50m2 stops
Alaska Airlines Logo
7:00 am - 5:03 pmBIL-ONT
11h 03m2 stops
$411Alaska Airlines
Find Deal
Mon, Dec 29 - Mon, Jan 5
Alaska Airlines Logo
7:19 pm - 12:32 amONT-BIL
28h 13m1 stop
Alaska Airlines Logo
6:00 am - 9:50 amBIL-ONT
28h 50m1 stop
$433Alaska Airlines
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

Cheapest flight$130
Most popular time to fly and prices are also 20% 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 $130 for a one-way ticket and $273 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 $388 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 $335 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 11380 reviews
7.0Entertainment
8.5Crew
7.1Food
8.1Boarding
7.8Comfort
Airline reviews

The ground crew did not supply drink or snacks during the layover in SFO. So there weren't many options. Otherwise, it was all great.

10.0 ExcellentAnnie, Nov 2025SFO - LAX
Read more Alaska Airlines reviews

The ground crew did not supply drink or snacks during the layover in SFO. So there weren't many options. Otherwise, it was all great.

No accommodation or credit offered for cancelled layover flight to Eugene from portland

I love a red eye flight. No lines to wait in. Lots of turbulence on the flight and a very shaky landing.

I truly appreciated the kindness and attentiveness of the staff and flight attendants. They did their best to be prompt with departure times to San Diego and back to New York! Alaska Airlines ... you are awesome!!

I purchased a 1st class ticket and unfortunately the main flight attendant was not the best and seemed more interested in her phone than the passengers at times. Then the plane didn’t get restocked and the only snacks for this flight were pretzels. However I would like to say that the rest of the flight crew and ground crew at the airport we’re great, especially the people that wheeled me around the airport some and then the one getting me to the plane and the automated wheelchair that wheeled me through the airport.

Flight from PSP delayed ~2hs and missed connection. Terrible service providing acommodations & food (no rides - just the hotel van every 30 min, which you have to call). 12 dollars in food for a 9 hour delay. 30+ minutes to get everything sorted out.

You need a n/a category. Too short a flight for food. I love flying on Alaska from Santa Rosa Airport!

I didn’t order food so can’t really say how it was. Overall, it was a great experience.

I've never flied them before but liked them. Weather was bad so a little scarey but they did a great job landing.

If they actually let me fly. I was rerouted to United and there was no Alaska airlines reps at all. Then the lady who worked the delta counter told me to go away and figure things out myself. Horrible experience.

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.

Our flight from SFO to MSP was right on time on 11/15/2025. No delays. As we approached MSP at about 8 pm, we circled in the air until 8:40 pm so I don't call that efficient for MSP. I think the captain should announce the delay and why. (as if we all don't know that we are just circling around the area, slowing down, speeding up, slowing down.) Thank you. Marilyn Fischer

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.

The flight used a B767 with a very old interior from before 2014. The entertainment system did not work at all during the flight despite attempts to reset the system. It was like they flew this route just to be competitive.

Delayed flight (1hour) plus a long layover after an overnight flight with no backup plane available.

Flight delayed for two and half hours and then canceled altogether due to mechanical issues. No mechanic onsite to fix so had to send one from LAX.

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

Older aircraft, no meal, only food was for purchase. Not impressed United.

Not pleasant trip cross country when the entertainment and WiFi system not working. No entertainment for entirety of route. Staff was rather nonchalant in that they dismissed the problem due to age of plane. It would have been nice to know this up front so I could have come prepared to read or download movies before boarding Coincidentally or not, there was a similar issue with the entertainment system on my previous flight I took on my fist leg of the trip. There are no seat TVs, so you must rely on the app when it works. United can do better. Also, what use it it to pay for boarding group 2 when half of the passengers are in the same line as you?

Premium Plus is a really good idea for longer flights

The flight attendants were great, I joked with one I can’t remember her name, a blond, really sweet. I thought it was run well very professional. This was great i survived Spirit, I know for which I speak.

I was in first class. The outlets at my seat did not work. The plane was shabby and run down. I had prepurchsed a day subscription for internet that was not redeemable. I had to repurchase the internet for my flight and then it didn’t work anyway. Quite disappointed in what was supposed to be the launch of a great vacation.

I understand stuff happens, but plane failures are likely due to lack of maintenance. Additionally, air conditioning wasn't working, no snack/drink service, no WiFi. Fortunately, the crew was communicative and light-hearted. United grabbed another plane and we were able to get to our destination.

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 you need to know for your flight from Ontario to Billings

Information on your arrival and departure airports