HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$133+ Cheap flights from Billings to Ontario (BIL - ONT)

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 5/13. Fares are subject to change and may not be available on all flights or dates of travel.
BIL — ONT
Mar 30 — Apr 61
Sun 3/30
Sun 4/6
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Billings to Ontario 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 Billings to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Billings (BIL) to Ontario (ONT). 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 March 25, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$264
(Alaska Airlines)

One-way from

$133
(Delta)

Popular in

July

Cheapest in

November

Average price

$398
Provider with most accurate pricing for Billings Logan Intl-Ontario flight deals.
Search Deals
Provider most trusted by Cheapflights users for Billings Logan Intl-Ontario flights.
Search Deals
From Billings Logan Intl to Ontario
Search Deals
One-way flight from Billings Logan Intl to Ontario
Search Deals
Highest demand for flights based on searches. 22% potential increase in price ($111 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($23 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2025
Search Deals

Find flight deals from Billings to Ontario

Cheapest flights from Billings to Ontario
Explore the most affordable flight options available from Billings to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 25, 2025.

This Alaska Airlines deal was found by Cheapflights users on 3/23. 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.
Tue 4/297:45 amBIL - ONT
1 stop13h 44mAlaska Airlines
Tue 5/138:59 pmONT - BIL
1 stop17h 08mAlaska Airlines
Deal found 3/23$264
This Delta deal was found by Cheapflights users on 3/23. 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 4/296:26 pmBIL - ONT
1 stop6h 15mDelta
Tue 5/136:00 amONT - BIL
2 stops10h 17mDelta
Deal found 3/23$270
This United Airlines deal was found by Cheapflights users on 3/23. 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 5/12:40 pmBIL - ONT
1 stop7h 13mUnited Airlines
Sat 5/31:20 pmONT - BIL
1 stop6h 38mUnited Airlines
Deal found 3/23$303
This United deal was found by Cheapflights users on 3/24. 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 6/135:00 amBIL - ONT
2 stops8h 14mMultiple Airlines
Sun 6/156:41 pmONT - BIL
2 stops22h 56mMultiple Airlines
Deal found 3/24$899

Cheapflights Fare Finder

Customize your flight search to find flights from Billings to Ontario 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 March 25, 2025.
Use the filters below to find and compare flights from Billings to Ontario that are best for you.

Fly from

Billings

Fly to

Ontario

Route

Depart

Return

Price

BillingsOntario

BIL - ONT

BILONT

Billings Logan Intl

Tue 4/29

7:45 am-8:29 pm

1 stop13h 44m

Ontario

Tue 5/13

8:59 pm-3:07 pm

1 stop17h 08m

$264

BillingsOntario

BIL - ONT

BILONT

Billings Logan Intl

Tue 4/29

6:26 pm-11:41 pm

1 stop6h 15m

Ontario

Tue 5/13

6:00 am-5:17 pm

2 stops10h 17m

$270

BillingsOntario

BIL - ONT

BILONT

Billings Logan Intl

Thu 5/1

2:40 pm-8:53 pm

1 stop7h 13m

Ontario

Sat 5/3

1:20 pm-8:58 pm

1 stop6h 38m

$303

BillingsOntario

BIL - ONT

BILONT

Billings Logan Intl

Fri 6/13

5:00 am-12:14 pm

2 stops8h 14m

Ontario

Sun 6/15

6:41 pm-6:37 pm

2 stops22h 56m

$899

BillingsOntario

BIL - ONT

BILONT

Billings Logan Intl

Tue 5/13

5:59 pm-11:42 pm

1 stop6h 43m

$133

BillingsOntario

BIL - ONT

BILONT

Billings Logan Intl

Tue 5/13

7:13 am-6:23 pm

2 stops12h 10m

$151

BillingsOntario

BIL - ONT

BILONT

Billings Logan Intl

Fri 4/11

2:30 pm-8:42 pm

1 stop7h 12m

$241

BillingsOntario

BIL - ONT

BILONT

Billings Logan Intl

Mon 6/9

7:24 pm-11:57 pm

2 stops29h 33m

$261

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/24

Compare providers for flights from Billings to Ontario

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Billings to Ontario in March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Billings-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Billings-Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Billings-Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Billings-Ontario flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Billings-Ontario flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Billings to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Billings 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 Billings to Ontario

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

Currently, August is the cheapest month in which you can book a flight from Billings to Ontario (average of $246). Flying from Billings to Ontario in March is currently the most expensive (average of $324). 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 BIL to ONT?

Find hourly flight availability from Billings to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 25, 2025.

A simple way to save on the total cost of your ticket is to fly from Billings to Ontario in the afternoon. If you’re flexible enough to do this you can expect to save up to 32% on your trip compared to booking a flight in the morning.

Rainfall in Ontario by month

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

In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.

Temperature in Ontario by month

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

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated March 25, 2025.
Alaska Airlines
8.0
Very good
9,785 reviews

Entertainment

7.1

Crew

8.5

Comfort

7.9

Food

7.1

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Seleste,Dec 2024

FAT - SAN

The attention and efficiency of the staff and the good handling of the pilot
Alaska Airlines
8.0
Very good
9,785 reviews
Alaska Airlines
8.0
Very good
9,785 reviews

Entertainment

7.1

Crew

8.5

Comfort

7.9

Food

7.1

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Seleste,Dec 2024

FAT - SAN

The attention and efficiency of the staff and the good handling of the pilot
Delta
8.0
Very good
7,890 reviews
Alaska Airlines
8.0
Very good
9,785 reviews

Entertainment

7.1

Crew

8.5

Comfort

7.9

Food

7.1

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Seleste,Dec 2024

FAT - SAN

The attention and efficiency of the staff and the good handling of the pilot
United Airlines
7.4
Good
8,605 reviews
Alaska Airlines
8.0
Very good
9,785 reviews

Entertainment

7.1

Crew

8.5

Comfort

7.9

Food

7.1

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Seleste,Dec 2024

FAT - SAN

The attention and efficiency of the staff and the good handling of the pilot
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
9,785 reviews

Entertainment

7.1

Crew

8.5

Comfort

7.9

Food

7.1

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Seleste,Dec 2024

FAT - SAN

The attention and efficiency of the staff and the good handling of the pilot

Related info for your journey

Find useful and relevant information for your journey from Billings to Ontario. 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 Billings to Ontario round-trip?

    Our cheapest airline available from Billings to Ontario is Alaska Airlines. Our recent data shows that you can find tickets from as low as $264 on this airline. Additional options worth looking into are Delta and United Airlines, starting at $270 and $303 round-trip. These flights start at 29% lower than the current average price 3 months from now.

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

    The cheapest airline one-way is Delta, with whom users have recently found tickets for as low as $133. However, be on the lookout for offers from American Airlines and United Airlines, as they are both options that can get you from Billings to Ontario for a low price.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Billings to Ontario 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 Billings to Ontario?

    Currently, August is the cheapest month in which you can book a flight from Billings to Ontario (average of $246). Flying from Billings to Ontario in March is currently the most expensive (average of $324). 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 Billings to Ontario

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

Top 2 airlines flying from Billings to Ontario

Discover the top 2 airlines that operate flights from Billings to Ontario. 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 March 25, 2025.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$82Average$263FlexibilityNo cancel feeOn-time75%
DeltaCheapest$266Average$373FlexibilityNo cancel feeOn-timeN/A
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.