HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Billings

$121+ Cheap flights from Ontario to Billings (ONT - BIL)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/9. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BIL
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to Billings with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Ontario to Billings

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Billings (BIL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated June 12, 2025.

Round-trip from

$240
(Hawaiian Airlines)

One-way from

$121
(Delta)

Popular in

March

Cheapest in

October

Average price

$399
From Ontario to Billings Logan Intl
Search Deals
One-way flight from Ontario to Billings Logan Intl
Search Deals
Highest demand for flights based on searches. 21% potential increase in price ($105 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($24 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2025
Search Deals

Find flight deals from Ontario to Billings

Cheapest flights from Ontario to Billings
Explore the most affordable flight options available from Ontario to Billings. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.

This Alaska Airlines deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/36:00 amONT - BIL
1 stop8h 03mAlaska Airlines
Thu 9/113:43 pmBIL - ONT
1 stop9h 10mAlaska Airlines
Deal found 6/9$240
This Delta deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/85:09 pmONT - BIL
1 stop5h 58mDelta
Tue 7/155:20 amBIL - ONT
1 stop4h 27mDelta
Deal found 6/10$241
This Hawaiian Airlines deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/207:10 amONT - BIL
1 stop5h 09mHawaiian Airlines
Mon 10/276:00 amBIL - ONT
1 stop5h 44mHawaiian Airlines
Deal found 6/11$280
This United Airlines deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/105:05 amONT - BIL
1 stop7h 12mUnited Airlines
Thu 7/174:15 pmBIL - ONT
1 stop5h 39mUnited Airlines
Deal found 6/10$311
This American Airlines deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/276:17 amONT - BIL
2 stops14h 13mAmerican Airlines
Sun 8/317:00 amBIL - ONT
2 stops12h 41mAmerican Airlines
Deal found 6/10$380
This United deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/181:19 pmONT - BIL
2 stops8h 28mMultiple Airlines
Sun 7/203:45 pmBIL - ONT
2 stops9h 28mMultiple Airlines
Deal found 6/9$893

Cheapflights Fare Finder

Customize your flight search to find flights from Ontario to Billings that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 12, 2025.
Use the filters below to find and compare flights from Ontario to Billings that are best for you.

Fly from

Ontario

Fly to

Billings

Route

Depart

Return

Price

OntarioBillings

ONT - BIL

ONTBIL

Ontario

Wed 9/3

11:39 am-6:38 pm

1 stop5h 59m

Billings Logan Intl

Thu 9/11

7:18 pm-11:59 pm

1 stop5h 41m

$240

OntarioBillings

ONT - BIL

ONTBIL

Ontario

Tue 7/8

5:09 pm-12:07 am

1 stop5h 58m

Billings Logan Intl

Tue 7/15

5:20 am-8:47 am

1 stop4h 27m

$241

OntarioBillings

ONT - BIL

ONTBIL

Ontario

Wed 8/27

3:04 pm-3:03 pm

1 stop22h 59m

Billings Logan Intl

Sun 8/31

7:18 pm-11:59 pm

1 stop5h 41m

$263

OntarioBillings

ONT - BIL

ONTBIL

Ontario

Thu 7/10

5:05 am-1:17 pm

1 stop7h 12m

Billings Logan Intl

Thu 7/17

4:15 pm-8:54 pm

1 stop5h 39m

$311

OntarioBillings

ONT - BIL

ONTBIL

Ontario

Wed 8/27

6:17 am-9:30 pm

2 stops14h 13m

Billings Logan Intl

Sun 8/31

7:00 am-6:41 pm

2 stops12h 41m

$380

OntarioBillings

ONT - BIL

ONTBIL

Ontario

Fri 7/18

1:19 pm-10:47 pm

2 stops8h 28m

Billings Logan Intl

Sun 7/20

3:45 pm-12:13 am

2 stops9h 28m

$893

OntarioBillings

ONT - BIL

ONTBIL

Ontario

Wed 7/9

5:09 pm-12:07 am

1 stop5h 58m

$121

OntarioBillings

ONT - BIL

ONTBIL

Ontario

Wed 6/25

7:00 am-5:49 pm

1 stop9h 49m

$146

OntarioBillings

ONT - BIL

ONTBIL

Ontario

Mon 6/16

4:00 pm-12:08 am

1 stop7h 08m

$275

OntarioBillings

ONT - BIL

ONTBIL

Ontario

Wed 7/2

1:19 pm-5:14 pm

2 stops26h 55m

$394

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/9

Showing 1-10 of 11 results
1
2

Best time to book a flight from Ontario to Billings

Have a flexible travel schedule? Discover the best time to fly to Billings from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

What is the cheapest month to book a flight from Ontario to Billings?

Currently, January is the cheapest month in which you can book a flight from Ontario to Billings (average of $396). Flying from Ontario to Billings in June is currently the most expensive (average of $517). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ONT to BIL?

Find hourly flight availability from Ontario to Billings. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 12, 2025.

One of the essential ways to save on airfare from Ontario to Billings is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the afternoon could potentially save you up to 31% on airfare.

Rainfall in Billings by month

Plan your trip to Billings by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Billings ranges from 0.5 - 2.2 inches per month. May is typically the wettest month, when rainfall can reach 2.2 in. January is typically the driest time to visit Billings when rainfall is around 0.5 in.

Temperature in Billings by month

Plan your trip to Billings by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Billings, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 26.6 F).

Reviews of airlines servicing Billings

Get insights into the airlines that provide service to Billings. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Billings. Reviews last updated June 12, 2025.
Get a feel of what it's like to fly with Alaska Airlines, Delta and Hawaiian Airlines from Ontario to Billings by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Entertainment

7.1

Food

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Entertainment

7.1

Food

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,950 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Entertainment

7.1

Food

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.9
Good
2,494 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Entertainment

7.1

Food

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Entertainment

7.1

Food

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Entertainment

7.1

Food

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Billings. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines flying from Ontario to Billings round-trip?

    Currently priced at $240, Hawaiian Airlines will fly you from Ontario to Billings and back. In addition to Hawaiian Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Delta and Alaska Airlines - these airlines can fly you to your destination from $241 and $284, respectively. Hawaiian Airlines is currently priced 39% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from Ontario to Billings one-way?

    The cheapest airlines for a one-way flight from Ontario to Billings are Delta ($121), Alaska Airlines ($275), and United Airlines ($394).

  • Can I find deals for flights from Ontario to Billings that include hotel bookings?

    Yes. In addition to deals on Ontario to Billings flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Billings?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Billings.

  • Can I find deals for business class flights from Ontario to Billings?

    Yes. Cheapflights offers flight deals from Ontario to Billings by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ontario to Billings?

    Currently, January is the cheapest month in which you can book a flight from Ontario to Billings (average of $396). Flying from Ontario to Billings in June is currently the most expensive (average of $517). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ontario to Billings

See prices for flight routes from nearby airports that may be better suited for you.
San Francisco to Bozeman flights
Los Angeles to Bozeman flights
Los Angeles to Kalispell flights
San Francisco to Kalispell flights
San Diego to Kalispell flights
San Francisco to Missoula flights
Los Angeles to Missoula flights
Ontario to Bozeman flights
San Diego to Bozeman flights
Ontario to Kalispell flights
Sacramento to Bozeman flights
San Diego to Missoula flights
Ontario to Missoula flights
San Jose to Kalispell flights
Santa Ana to Missoula flights
Santa Ana to Kalispell flights
Santa Ana to Bozeman flights
Los Angeles to Billings flights
San Francisco to West Yellowstone flights
Sacramento to Kalispell flights
Las Vegas to Bozeman flights
San Jose to Bozeman flights
Oakland to Kalispell flights
Burbank to Missoula flights
Oakland to Bozeman flights
Burbank to Kalispell flights
Fresno to Bozeman flights
Los Angeles to Helena flights
Oakland to Missoula flights
San Jose to Missoula flights
Sacramento to Missoula flights
San Francisco to Helena flights
San Francisco to Billings flights
San Diego to Great Falls flights
San Jose to West Yellowstone flights
Las Vegas to Kalispell flights
Medford to Kalispell flights
Burbank to Bozeman flights
Sacramento to Helena flights
Reno to Billings flights
Fresno to Kalispell flights
Palm Springs to Bozeman flights
San Diego to Billings flights
Santa Barbara to Bozeman flights
Fresno to Missoula flights
Los Angeles to Great Falls flights
Medford to Billings flights
Santa Ana to West Yellowstone flights
Los Angeles to Butte flights

Top 3 airlines flying from Ontario to Billings

Discover the top 3 airlines that operate flights from Ontario to Billings. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$254Average$310FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$286Average$367FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$361Average$494FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.