$156+ 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 8/18. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BIL
Aug 12 — Aug 191
Round-trip
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
Cheapest
Best
Last-minute
One-way
Cheapest flights from Ontario to BillingsExplore 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 July 13, 2026.
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 July 13, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/2411:50 am
ONT
- BIL
1 stop7h 18m
Multiple Airlines
Fri 8/284:00 pm
BIL
- ONT
1 stop24h 54m
Multiple Airlines
Deal found 7/11![Multiple Airlines logo]()
$299
This Alaska Airlines deal was found by Cheapflights users on 7/13. 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 8/186:02 am
ONT
- BIL
1 stop6h 03m
Alaska Airlines
Wed 8/266:14 am
BIL
- ONT
1 stop5h 50m
Alaska Airlines
Deal found 7/13![Alaska Airlines logo]()
$311
This Kiwi.com deal was found by Cheapflights users on 7/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/164:09 pm
ONT
- BIL
1 stop16h 01m
Multiple Airlines
Mon 8/248:58 pm
BIL
- ONT
2 stops18h 05m
Multiple Airlines
Deal found 7/13![Multiple Airlines logo]()
$314
This United Airlines deal was found by Cheapflights users on 7/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/251:18 pm
ONT
- BIL
1 stop6h 42m
United Airlines
Tue 9/17:00 am
BIL
- ONT
2 stops12h 11m
United Airlines
Deal found 7/11![United Airlines logo]()
$316
This Kiwi.com deal was found by Cheapflights users on 7/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/92:58 pm
ONT
- BIL
1 stop5h 34m
Multiple Airlines
Mon 10/128:52 pm
BIL
- ONT
1 stop14h 29m
Multiple Airlines
Deal found 7/13![Multiple Airlines logo]()
$347
This Kiwi.com deal was found by Cheapflights users on 7/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/233:40 pm
ONT
- BIL
1 stop27h 28m
Multiple Airlines
Fri 8/284:00 pm
BIL
- ONT
1 stop17h 03m
Multiple Airlines
Deal found 7/11![Multiple Airlines logo]()
$348
This Delta deal was found by Cheapflights users on 7/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/245:05 pm
ONT
- BIL
1 stop4h 20m
Delta
Sat 8/296:25 pm
BIL
- ONT
1 stop4h 58m
Delta
Deal found 7/11![Delta logo]()
$359
This Delta deal was found by Cheapflights users on 7/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/175:05 pm
ONT
- BIL
1 stop4h 20m
Delta
Tue 8/255:20 am
BIL
- ONT
1 stop4h 32m
Delta
Deal found 7/9![Delta logo]()
$361
This Priceline deal was found by Cheapflights users on 7/13. 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.
Wed 9/97:12 am
ONT
- BIL
1 stop6h 50m
Alaska Airlines
Sat 9/126:14 am
BIL
- ONT
1 stop9h 02m
Alaska Airlines
Deal found 7/13![Alaska Airlines logo]()
$362
Best flights from Ontario to BillingsDiscover carefully curated flight deals from Ontario to Billings that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 13, 2026.
Discover carefully curated flight deals from Ontario to Billings that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 13, 2026.
This Delta deal was found by Cheapflights users on 7/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/245:05 pm
ONT
- BIL
1 stop4h 20m
Delta
Sun 8/305:20 am
BIL
- ONT
1 stop4h 32m
Delta
Deal found 7/11![Delta logo]()
$361
This Alaska Airlines deal was found by Cheapflights users on 7/11. 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.
Fri 9/186:14 pm
ONT
- BIL
2 stops16h 26m
Alaska Airlines
Mon 9/216:14 am
BIL
- ONT
1 stop6h 02m
Alaska Airlines
Deal found 7/11![Alaska Airlines logo]()
$412
This United Airlines deal was found by Cheapflights users on 7/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/91:00 pm
ONT
- BIL
1 stop6h 51m
United Airlines
Wed 1/132:40 pm
BIL
- ONT
2 stops9h 26m
United Airlines
Deal found 7/11![United Airlines logo]()
$444
This Alaska Airlines deal was found by Cheapflights users on 7/11. 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 1/94:00 pm
ONT
- BIL
1 stop7h 08m
Alaska Airlines
Wed 1/136:00 am
BIL
- ONT
1 stop6h 09m
Alaska Airlines
Deal found 7/11![Alaska Airlines logo]()
$414
This Delta deal was found by Cheapflights users on 7/10. 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.
Sun 8/239:43 am
ONT
- BIL
1 stop7h 01m
Delta
Thu 8/275:20 am
BIL
- ONT
1 stop4h 32m
Delta
Deal found 7/10![Delta logo]()
$435
This Alaska Airlines deal was found by Cheapflights users on 7/9. 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.
Sat 9/57:12 am
ONT
- BIL
2 stops10h 37m
Alaska Airlines
Sat 9/126:14 am
BIL
- ONT
1 stop6h 02m
Alaska Airlines
Deal found 7/9![Alaska Airlines logo]()
$415
This Alaska Airlines deal was found by Cheapflights users on 7/13. 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.
Thu 11/54:09 pm
ONT
- BIL
1 stop5h 34m
Alaska Airlines
Sun 11/86:00 am
BIL
- ONT
2 stops11h 58m
Alaska Airlines
Deal found 7/13![Alaska Airlines logo]()
$427
Last-minute flights from Ontario to BillingsDiscover last-minute flight deals from Ontario to Billings. Data last updated July 13, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Billings. Data last updated July 13, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 7/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/164:09 pm
ONT
- BIL
1 stop16h 01m
Multiple Airlines
Mon 8/248:58 pm
BIL
- ONT
2 stops18h 05m
Multiple Airlines
Deal found 7/13![Multiple Airlines logo]()
$314
This Delta deal was found by Cheapflights users on 7/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/175:05 pm
ONT
- BIL
1 stop4h 20m
Delta
Tue 8/255:20 am
BIL
- ONT
1 stop4h 32m
Delta
Deal found 7/9![Delta logo]()
$361
This Expedia deal was found by Cheapflights users on 7/8. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/179:20 pm
ONT
- BIL
1 stop14h 45m
Alaska Airlines
Tue 8/256:14 am
BIL
- ONT
2 stops15h 10m
Alaska Airlines
Deal found 7/8![Alaska Airlines logo]()
$367
This Alaska Airlines deal was found by Cheapflights users on 7/13. 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 8/186:02 am
ONT
- BIL
1 stop6h 03m
Alaska Airlines
Wed 8/266:14 am
BIL
- ONT
1 stop5h 50m
Alaska Airlines
Deal found 7/13![Alaska Airlines logo]()
$311
This Kiwi.com deal was found by Cheapflights users on 7/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/233:40 pm
ONT
- BIL
1 stop27h 28m
Multiple Airlines
Fri 8/284:00 pm
BIL
- ONT
1 stop17h 03m
Multiple Airlines
Deal found 7/11![Multiple Airlines logo]()
$348
This Kiwi.com deal was found by Cheapflights users on 7/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/2411:50 am
ONT
- BIL
1 stop7h 18m
Multiple Airlines
Fri 8/284:00 pm
BIL
- ONT
1 stop24h 54m
Multiple Airlines
Deal found 7/11![Multiple Airlines logo]()
$299
This Delta deal was found by Cheapflights users on 7/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/245:05 pm
ONT
- BIL
1 stop4h 20m
Delta
Sat 8/296:25 pm
BIL
- ONT
1 stop4h 58m
Delta
Deal found 7/11![Delta logo]()
$359
This United Airlines deal was found by Cheapflights users on 7/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/251:18 pm
ONT
- BIL
1 stop6h 42m
United Airlines
Tue 9/17:00 am
BIL
- ONT
2 stops12h 11m
United Airlines
Deal found 7/11![United Airlines logo]()
$316
One-way flights from Ontario to BillingsSearch for one-way flight options from Ontario to Billings. Find affordable one-way fares based on user searches. Data last updated July 13, 2026.
Search for one-way flight options from Ontario to Billings. Find affordable one-way fares based on user searches. Data last updated July 13, 2026.
This Delta deal was found by Cheapflights users on 7/8. 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.
Tue 8/185:05 pm
ONT
- BIL
1 stop4h 20m
Delta
Deal found 7/8![Delta logo]()
$156
This Booking.com deal was found by Cheapflights users on 7/11. 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.
Mon 8/179:20 pm
ONT
- BIL
1 stop14h 45m
Alaska Airlines
Deal found 7/11![Alaska Airlines logo]()
$161
This Booking.com deal was found by Cheapflights users on 7/9. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/37:59 pm
ONT
- BIL
1 stop14h 32m
Alaska Airlines
Deal found 7/9![Alaska Airlines logo]()
$186
This United Airlines deal was found by Cheapflights users on 7/12. 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 11/189:00 am
ONT
- BIL
2 stops12h 16m
United Airlines
Deal found 7/12![United Airlines logo]()
$201
This Delta deal was found by Cheapflights users on 7/12. 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.
Sat 11/145:05 pm
ONT
- BIL
1 stop4h 27m
Delta
Deal found 7/12![Delta logo]()
$204
This Delta deal was found by Cheapflights users on 7/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/15:10 pm
ONT
- BIL
1 stop4h 43m
Delta
Deal found 7/11![Delta logo]()
$206
This Alaska Airlines deal was found by Cheapflights users on 7/12. 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 11/1410:37 am
ONT
- BIL
2 stops11h 06m
Alaska Airlines
Deal found 7/12![Alaska Airlines logo]()
$242
This Delta deal was found by Cheapflights users on 7/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/185:10 pm
ONT
- BIL
1 stop4h 43m
Delta
Deal found 7/9![Delta logo]()
$246
This Expedia deal was found by Cheapflights users on 7/8. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/197:12 am
ONT
- BIL
2 stops15h 17m
Alaska Airlines
Deal found 7/8![Alaska Airlines logo]()
$248
This Booking.com deal was found by Cheapflights users on 7/12. 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.
Mon 9/284:50 pm
ONT
- BIL
2 stops17h 50m
Alaska Airlines
Deal found 7/12![Alaska Airlines logo]()
$268
This Alaska Airlines deal was found by Cheapflights users on 7/12. 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 11/176:00 am
ONT
- BIL
2 stops7h 52m
Alaska Airlines
Deal found 7/12![Alaska Airlines logo]()
$277
Find 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 July 13, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $299 (Kiwi.com) |
One-way from | $156 (Delta) |
Popular in | April |
Cheapest in | February |
Average price | $360 |
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 July 13, 2026.
Use the filters below to find and compare flights from Ontario to Billings that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
OntarioBillings
ONT - BIL
ONTBIL
Ontario
Mon 8/24
5:05 pm-10:25 pm
1 stop4h 20m
Billings Logan Intl
Sun 8/30
5:20 am-8:52 am
1 stop4h 32m
$361
OntarioBillings
ONT - BIL
ONTBIL
Ontario
Fri 9/18
6:14 pm-11:40 am
2 stops16h 26m
Billings Logan Intl
Mon 9/21
6:14 am-11:16 am
1 stop6h 02m
$412
OntarioBillings
ONT - BIL
ONTBIL
Ontario
Sat 1/9
4:00 pm-12:08 am
1 stop7h 08m
Billings Logan Intl
Wed 1/13
6:00 am-11:09 am
1 stop6h 09m
$414
OntarioBillings
ONT - BIL
ONTBIL
Ontario
Sat 9/5
7:12 am-6:49 pm
2 stops10h 37m
Billings Logan Intl
Sat 9/12
6:14 am-11:16 am
1 stop6h 02m
$415
OntarioBillings
ONT - BIL
ONTBIL
Ontario
Thu 11/5
4:09 pm-10:43 pm
1 stop5h 34m
Billings Logan Intl
Sun 11/8
6:00 am-4:58 pm
2 stops11h 58m
$427
OntarioBillings
ONT - BIL
ONTBIL
Ontario
Sun 8/23
9:43 am-5:44 pm
1 stop7h 01m
Billings Logan Intl
Thu 8/27
5:20 am-8:52 am
1 stop4h 32m
$435
OntarioBillings
ONT - BIL
ONTBIL
Ontario
Sat 1/9
1:00 pm-8:51 pm
1 stop6h 51m
Billings Logan Intl
Wed 1/13
2:40 pm-11:06 pm
2 stops9h 26m
$444
Cheapest one-way
OntarioBillings
ONT - BIL
ONTBIL
Ontario
Wed 8/19
3:07 pm-11:29 pm
1 stop7h 22m
$156
Quickest one-way
OntarioBillings
ONT - BIL
ONTBIL
Ontario
Thu 11/19
5:05 pm-10:32 pm
1 stop4h 27m
$156
OntarioBillings
ONT - BIL
ONTBIL
Ontario
Tue 11/17
7:15 am-2:52 pm
1 stop6h 37m
$156
Showing 1-10 of 18 resultsSorted by cheapest first
Compare providers for flights from Ontario to Billings
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 Ontario to Billings in July.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Ontario-Billings flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Billings flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Billings flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Ontario-Billings 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 Ontario-Billings 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 Ontario to Billings
Have a flexible travel schedule? Discover the best time to fly to Billings from Ontario with our price prediction graph.
ONT-BIL
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.
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 July 13, 2026.
Read through reviews of airlines operating flights from Ontario to Billings, such as Alaska Airlines and Delta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Boarding
8.1
Comfort
7.8
Overall
7.9
Entertainment
7.0
Food
7.1
Crew
8.5
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Boarding
8.1
Comfort
7.8
Overall
7.9
Entertainment
7.0
Food
7.1
Crew
8.5
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Boarding
8.1
Comfort
7.8
Overall
7.9
Entertainment
7.0
Food
7.1
Crew
8.5
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
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.
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
Billings flight routes
Complete your trip
Flights by cabin class
Other flight options
Other flights from Ontario
Popular flights
Alternative routes for Ontario to Billings
See prices for flight routes from nearby airports that may be better suited for you.
Other flights to Billings
Explore flights to Billings departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on July 13, 2026.
Complete your trip
Complete your trip to Billings by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Ontario to Billings by cabin class
Find flights from Ontario to Billings, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Ontario and Billings flights
Browse other Ontario and Billings flight options. Last updated on July 13, 2026.
Other flights from Ontario
Browse through other flights departing from Ontario. Flights are based on user searches made on Cheapflights and were last updated on July 13, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 2 airlines flying from Ontario to Billings
Discover the top 2 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 July 13, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$260 | Average$364 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$269 | Average$619 | FlexibilityNo cancel fee | On-time75% |