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Ontario

$156+ 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 9/24. Fares are subject to change and may not be available on all flights or dates of travel.
BIL — ONT
Jul 12 — Jul 191
Sun 7/12
Sun 7/19
1 adult, Economy
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Cheap 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 June 12, 2026.

This Delta deal was found by Cheapflights users on 6/8. 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.
Wed 8/196:33 pm
BIL
-
ONT
1 stop6h 01m
Delta
Mon 8/245:05 pm
ONT
-
BIL
1 stop4h 20m
Delta
Deal found 6/8$311
This Alaska 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/146:00 am
BIL
-
ONT
1 stop6h 18m
Alaska Airlines
Wed 11/187:15 am
ONT
-
BIL
1 stop6h 37m
Alaska Airlines
Deal found 6/11$359
This Booking.com 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/307:32 pm
BIL
-
ONT
1 stop18h 47m
Alaska Airlines
Tue 11/35:52 pm
ONT
-
BIL
1 stop20h 00m
Alaska Airlines
Deal found 6/10$361
This Priceline 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/256:00 am
BIL
-
ONT
1 stop6h 14m
Alaska Airlines
Thu 7/305:26 pm
ONT
-
BIL
1 stop5h 25m
Alaska Airlines
Deal found 6/10$369
This Booking.com deal was found by Cheapflights users on 6/8. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/27:22 pm
BIL
-
ONT
1 stop16h 52m
Alaska Airlines
Wed 7/82:05 pm
ONT
-
BIL
1 stop8h 46m
Alaska Airlines
Deal found 6/8$371
This Expedia deal was found by Cheapflights users on 6/7. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/246:00 am
BIL
-
ONT
1 stop6h 14m
Alaska Airlines
Wed 7/82:05 pm
ONT
-
BIL
1 stop8h 46m
Alaska Airlines
Deal found 6/7$375
This Booking.com deal was found by Cheapflights users on 6/8. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/253:42 pm
BIL
-
ONT
2 stops20h 22m
Alaska Airlines
Tue 9/13:07 pm
ONT
-
BIL
1 stop7h 22m
Alaska Airlines
Deal found 6/8$377
This Delta deal was found by Cheapflights users on 6/8. 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.
Wed 10/1411:35 am
BIL
-
ONT
2 stops12h 08m
Delta
Sun 10/186:00 am
ONT
-
BIL
1 stop4h 04m
Delta
Deal found 6/8$382
This Booking.com deal was found by Cheapflights users on 6/8. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/47:20 pm
BIL
-
ONT
2 stops21h 32m
Alaska Airlines
Tue 9/83:14 pm
ONT
-
BIL
1 stop7h 15m
Alaska Airlines
Deal found 6/8$387
This United Airlines deal was found by Cheapflights users on 6/8. 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.
Wed 8/195:00 am
BIL
-
ONT
2 stops8h 12m
United Airlines
Mon 8/241:18 pm
ONT
-
BIL
1 stop6h 42m
United Airlines
Deal found 6/8$393
This CheapOair deal was found by Cheapflights users on 6/7. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/117:29 pm
BIL
-
ONT
2 stops21h 18m
Alaska Airlines
Mon 9/143:14 pm
ONT
-
BIL
1 stop7h 15m
Alaska Airlines
Deal found 6/7$397
This Booking.com 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/286:00 am
BIL
-
ONT
1 stop8h 09m
Alaska Airlines
Fri 7/315:32 pm
ONT
-
BIL
1 stop20h 31m
Alaska Airlines
Deal found 6/11$409

Find 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 June 12, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$311
(Delta)

One-way from

$156
(Delta)

Popular in

May

Cheapest in

June

Average price

$180
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
High demand for flights, 5% potential price rise
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($15 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
Search Deals

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 June 12, 2026.
Use the filters below to find and compare flights from Billings to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BillingsOntario

BIL - ONT

BILONT

Billings Logan Intl

Sat 11/14

6:00 am-11:18 am

1 stop6h 18m

Ontario

Wed 11/18

7:15 am-2:52 pm

1 stop6h 37m

$359

BillingsOntario

BIL - ONT

BILONT

Billings Logan Intl

Fri 10/30

6:01 am-1:19 pm

1 stop8h 18m

Ontario

Wed 11/4

4:09 pm-10:43 pm

1 stop5h 34m

$361

BillingsOntario

BIL - ONT

BILONT

Billings Logan Intl

Wed 6/24

6:00 am-11:14 am

1 stop6h 14m

Ontario

Wed 7/8

2:05 pm-11:51 pm

1 stop8h 46m

$375

BillingsOntario

BIL - ONT

BILONT

Billings Logan Intl

Tue 8/25

3:42 pm-11:04 am

2 stops20h 22m

Ontario

Tue 9/1

3:07 pm-11:29 pm

1 stop7h 22m

$377

BillingsOntario

BIL - ONT

BILONT

Billings Logan Intl

Wed 8/19

5:00 am-12:12 pm

2 stops8h 12m

Ontario

Mon 8/24

1:18 pm-9:00 pm

1 stop6h 42m

$393

BillingsOntario

BIL - ONT

BILONT

Billings Logan Intl

Fri 9/11

7:29 pm-3:47 pm

2 stops21h 18m

Ontario

Mon 9/14

3:14 pm-11:29 pm

1 stop7h 15m

$397
Quickest round-trip

BillingsOntario

BIL - ONT

BILONT

Billings Logan Intl

Sun 9/6

6:42 pm-10:23 pm

1 stop4h 41m

Ontario

Sat 9/12

6:00 am-11:00 am

1 stop4h 00m

$409

BillingsOntario

BIL - ONT

BILONT

Billings Logan Intl

Sun 9/6

7:00 am-6:11 pm

2 stops12h 11m

Ontario

Sat 9/12

1:56 pm-10:53 pm

2 stops7h 57m

$419

BillingsOntario

BIL - ONT

BILONT

Billings Logan Intl

Fri 10/2

6:14 am-11:16 am

1 stop6h 02m

Ontario

Tue 10/6

6:54 pm-11:50 pm

1 stop27h 56m

$422
Cheapest one-way

BillingsOntario

BIL - ONT

BILONT

Billings Logan Intl

Thu 9/24

5:20 am-8:53 am

1 stop4h 33m

$156

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/7

Showing 1-10 of 18 resultsSorted by cheapest first
1
2

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 June.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust 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

How much does it cost to fly round-trip from Billings to Ontario?

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 June 12, 2026.
See what other customers who have flown with Delta from Billings to Ontario have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,400 reviews

Comfort

7.8

Overall

7.9

Boarding

8.1

Crew

8.5

Food

7.2

Entertainment

7.8

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
7.9
Good
8,400 reviews
Delta
7.9
Good
8,400 reviews

Comfort

7.8

Overall

7.9

Boarding

8.1

Crew

8.5

Food

7.2

Entertainment

7.8

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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.

  • How long is the flight from Billings to Ontario?

    For as low as $359, Alaska Airlines can have you in Ontario from Billings in 6h 18m. The distance between Billings and Ontario is about 941 mi.

  • What is the cheapest airline to fly from Billings to Ontario round-trip?

    Our cheapest airline available from Billings to Ontario is Delta. Our recent data shows that you can find tickets from as low as $180 on this airline. This flight start at 56% lower than the current average price 3 months from now.

  • 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.

See more FAQs

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Top airline flying from Billings to Ontario

Discover the top airline 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 June 12, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$180Average$329FlexibilityNo cancel feeOn-timeN/A

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