ONT - BIL

$123 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 6/17. 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

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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Flights Deals

Cheap Flight Deals 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.

Recent round-trip flight deals from Ontario to Billings

KAYAK's recommended round-trip deals from the most popular airlines that fly from Ontario to Billings.
Discover the best prices for you by selecting your travel dates on KAYAK.
Alaska Airlines Logo
4:45 pm - 11:59 pmONT-BIL
6h 14m1 stop
Alaska Airlines Logo
3:45 pm - 11:57 pmBIL-ONT
9h 12m1 stop
$273Alaska Airlines
Find Deal
Tue, Jun 3 - Tue, Jun 10
Alaska Airlines Logo
4:45 pm - 11:59 pmONT-BIL
6h 14m1 stop
Alaska Airlines Logo
3:45 pm - 10:46 pmBIL-ONT
8h 01m2 stops
$279Alaska Airlines
Find Deal
Tue, Jun 3 - Tue, Jun 10
Delta Logo
6:00 am - 10:58 amONT-BIL
3h 58m1 stop
Delta Logo
5:20 am - 8:47 amBIL-ONT
4h 27m1 stop
$310Delta
Find Deal
Fri, Jul 11 - Mon, Jul 14
Delta Logo
11:25 am - 12:07 amONT-BIL
11h 42m2 stops
Delta Logo
5:20 am - 8:47 amBIL-ONT
4h 27m1 stop
$315Delta
Find Deal
Mon, Aug 4 - Fri, Aug 8
Alaska Airlines Logo
7:30 am - 1:23 pmONT-BIL
4h 53m1 stop
Alaska Airlines Logo
7:18 pm - 11:59 pmBIL-ONT
5h 41m1 stop
$328Alaska Airlines
Find Deal
Wed, Jul 16 - Sat, Sep 6
Delta Logo
4:57 pm - 12:19 amONT-BIL
6h 22m1 stop
Delta Logo
5:20 am - 9:11 amBIL-ONT
4h 51m1 stop
$338Delta
Find Deal
Fri, May 16 - Fri, May 23
United Airlines Logo
5:10 am - 1:17 pmONT-BIL
7h 07m1 stop
United Airlines Logo
4:16 pm - 9:04 pmBIL-ONT
5h 48m1 stop
$362United Airlines
Find Deal
Sun, Jun 1 - Sat, Jun 7
United Airlines Logo
5:10 am - 1:17 pmONT-BIL
7h 07m1 stop
United Airlines Logo
5:00 am - 12:14 pmBIL-ONT
8h 14m2 stops
$367United Airlines
Find Deal
Sun, Jun 1 - Sat, Jun 7
American Airlines Logo
12:59 am - 10:11 pmONT-BIL
20h 12m1 stop
American Airlines Logo
7:00 am - 1:41 pmBIL-ONT
7h 41m1 stop
$632American Airlines
Find Deal
Sun, Aug 3 - Fri, Aug 8
American Airlines Logo
12:59 am - 10:11 pmONT-BIL
20h 12m1 stop
American Airlines Logo
7:00 am - 6:17 pmBIL-ONT
12h 17m2 stops
$698American Airlines
Find Deal
Sun, Aug 3 - Fri, Aug 8
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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.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Ontario to Billings, 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 Ontario to Billings is October, where tickets cost $294 (return) on average. On the other hand, the most expensive months are March and April, where the average cost of round-trip tickets is $621 and $621 respectively.

Good to know

Low seasonApril
High seasonMay
Cheapest flight$123
Best time to beat the crowds but there is an average 50% increase in price.
Most popular time to fly and prices are also 25% 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 $123 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?

    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 $309 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.

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 9968 reviews
8.2Boarding
7.1Entertainment
7.9Comfort
7.1Food
8.5Crew
Airline reviews

I got the last seat on the plane, in the back in the corner against the window, and I paid a competitive price for my ticket several weeks before the flight.

2.0 MediocreAnonymous, Apr 2025SNA - PDX
Read more Alaska Airlines reviews

I got the last seat on the plane, in the back in the corner against the window, and I paid a competitive price for my ticket several weeks before the flight.

Long delay before boarding. By the time I was informed of the delay I was already at the gate.

There was no seating at the gate, no where to charge your devices, super crowded. Boarding in group F meant all luggage space was taken when it was time for me to board. The boarding crew was short with everyone and seemed irritated. The luggage space was insufficient, the seat was too small for me (6'4") and very uncomfortable trip. I was in a middle seat between a person snoring the whole trip and a person with very strong body odor. The flight crew was terse and unfriendly, seemed irritated and impatient. Yelled a lot at people with earbuds in, understandable. Finally, we arrived 10 minutes early, only to sit on the tarmac for 20 minutes and wait for a gate. Worst flight experience I've had in years.

Check your emails that you sent me. 9 emails were sent telling me that my flight is Delayed. Each one with a different time 7:10, 7:55, 9:31, 9:09, 9:29, 9:44, 10:00, 9:49, and 10:10. That was how my experience went.

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.

Personal demeanor not good on flight returning to LAX..Great and superb on the way to Portland

No non-alcoholic drinks available except water and small apple juice cans.

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!!

First time flying with any airline that has decent seating. Great experience crew was friendly and the pilot was as well.

The flight was delayed by 3 hours and 30 minutes without any explanation.

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

Thank you for not flipping the plane on the run way. You guys get a 5 star rating for the flight!!!

Boarding is, as it always is… horrible. Gate lice. Slow moving zones. Too many people with carry ons

It was terrible, if they ran flights on time it would make a big difference.

Delta seems to be improving in many areas, except they are super bad with the food available. Bring back normal food service on long flights.

I actually received a notification from kayak on email but not one by text from Delta when my departure gait changed and I almost missed my flight

New boarding doesn't make sense. Filling front first is slow.

Delta flight was great from the check in all the way to arrival. However, I had a very bad experience. I requested a wheelchair and the wheelchair employee that went to pick me up from the plane in Boston to bring me to the baggage claims told me I have to pay him. I was under the impression that it was a free service and I usually give tips but the person forced me to pay and since I said no because I was upset with his demand when my daughter walked in to pick me up he demanded payment from my daughter who paid him thinking maybe now it is a charged service.

Horrible. Grateful to be alive but spent 13 hours at airport only to return back to my familys house and flight changed to next day. They tried to fix a part on plane, had no back up plane and after 10 hours , reattempted the flight and it STILL wasn't fixed. We got a meal voucher and rescheduled flight but there should be some other compensation for the 15 hours spent in airport

My seat was changed at the last minute and I was moved to the last row, right next to the bathroom despite selecting my seat well in advance. I was also made to check my carry on due to space but when I got on the plane there was significant empty overhead space. Picking up my carry on from the luggage carousel added time to my trip which had already been extended due to delay.

The gate was too far away for the connecting flight

Compared with other carriers business class for an overnight was not worth the extra expense.

Easy to board. Flight was super crowded though so I didn't sleep well on that cross country red-eye flight. The aisles seem ot have gotten narrower and the seat smaller whn luggage and people are getting bigger so it would be AWESOME to have more space and breathing room in general ;)

Pilot Erika DeLong made us feel safe and at ease in a frankly scary time to be flying. Her warm smile and greeting and excellent command of the aircraft in foggy bumpy weather helped us all to calm our nerves and get us home safely.

Plenty of room for me and the cat in Premium Economy. Seat was comfortable. Boarding was a breeze. The lady at the special check-in desk was great, super helpful and professional.

Wish movie and music choices changed more often. Mostly same from a month or two ago when I last flew.

It was good. Just that the seats could not be reclined. The people behind were not ready to let the chairs be reclined

Plane left & arrived early- 5 Crew great. Wi fi - paid for 2, only 1 worked - so so. Waste of $. Coolie was good

There was no USB plug in my section of the plane. So I could not charge my phone. Also, there was no screen to watch movie or anything like that. Wish I had known that in advance, I would’ve brought my iPad.

Made all groups except 2 check despite ample bin space. Inflight WiFi and entertainment didn’t work most of the time.

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

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