$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 8/11. Fares are subject to change and may not be available on all flights or dates of travel.
BIL — ONT
Aug 12 — Aug 191
Round-trip
1 adult, Economy
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Find cheap flights from Billings to Ontario with Cheapflights
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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
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Best
Last-minute
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Cheapest flights from Billings to OntarioExplore 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 July 13, 2026.
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 July 13, 2026.
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/199:47 pm
BIL
- ONT
1 stop19h 23m
Multiple Airlines
Thu 11/129:43 pm
ONT
- BIL
1 stop10h 31m
Multiple Airlines
Deal found 7/12![Multiple Airlines logo]()
$250
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/235:51 pm
BIL
- ONT
1 stop23h 19m
Multiple Airlines
Thu 11/1211:19 am
ONT
- BIL
1 stop20h 55m
Multiple Airlines
Deal found 7/12![Multiple Airlines logo]()
$307
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.
Wed 8/55:20 am
BIL
- ONT
1 stop4h 32m
Delta
Wed 8/125:05 pm
ONT
- BIL
1 stop4h 20m
Delta
Deal found 7/9![Delta 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.
Mon 8/1010:00 am
BIL
- ONT
1 stop6h 54m
Multiple Airlines
Sun 8/164:09 pm
ONT
- BIL
1 stop16h 01m
Multiple Airlines
Deal found 7/13![Multiple Airlines logo]()
$319
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.
Wed 10/216:01 am
BIL
- ONT
1 stop8h 20m
Alaska Airlines
Tue 11/107:15 am
ONT
- BIL
1 stop6h 37m
Alaska Airlines
Deal found 7/12![Alaska Airlines logo]()
$336
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/910:22 pm
BIL
- ONT
1 stop12h 59m
Multiple Airlines
Mon 10/1211:16 am
ONT
- BIL
1 stop7h 46m
Multiple Airlines
Deal found 7/8![Multiple Airlines logo]()
$344
This Trip.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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/243:42 pm
BIL
- ONT
1 stop5h 42m
Alaska Airlines
Mon 8/313:07 pm
ONT
- BIL
1 stop7h 22m
Alaska Airlines
Deal found 7/13![Alaska Airlines logo]()
$346
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 10/176:25 pm
BIL
- ONT
1 stop4h 37m
Delta
Mon 11/96:00 am
ONT
- BIL
1 stop4h 04m
Delta
Deal found 7/12![Delta logo]()
$359
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.
Sun 10/186:25 pm
BIL
- ONT
1 stop6h 21m
Delta
Thu 11/126:00 am
ONT
- BIL
1 stop4h 04m
Delta
Deal found 7/12![Delta logo]()
$361
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 10/206:01 am
BIL
- ONT
2 stops11h 49m
Alaska Airlines
Thu 11/124:09 pm
ONT
- BIL
1 stop5h 34m
Alaska Airlines
Deal found 7/12![Alaska Airlines logo]()
$367
Best flights from Billings to OntarioDiscover carefully curated flight deals from Billings to Ontario 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 Billings to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 13, 2026.
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.
Mon 8/1010:00 am
BIL
- ONT
2 stops51h 48m
Multiple Airlines
Sun 8/164:09 pm
ONT
- BIL
1 stop16h 01m
Multiple Airlines
Deal found 7/13![Multiple Airlines logo]()
$323
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.
Mon 8/105:20 am
BIL
- ONT
1 stop4h 32m
Delta
Wed 8/125:05 pm
ONT
- BIL
1 stop4h 20m
Delta
Deal found 7/10![Delta logo]()
$361
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.
Tue 9/226:14 am
BIL
- ONT
1 stop6h 02m
Alaska Airlines
Sun 9/277:12 am
ONT
- BIL
2 stops15h 17m
Alaska Airlines
Deal found 7/9![Alaska Airlines logo]()
$397
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.
Fri 9/42:29 pm
BIL
- ONT
2 stops9h 30m
United Airlines
Tue 9/89:01 am
ONT
- BIL
2 stops10h 59m
United Airlines
Deal found 7/12![United Airlines logo]()
$419
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/910:22 pm
BIL
- ONT
1 stop12h 59m
Multiple Airlines
Mon 10/1211:16 am
ONT
- BIL
1 stop7h 46m
Multiple Airlines
Deal found 7/8![Multiple Airlines logo]()
$344
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.
Fri 9/412:11 pm
BIL
- ONT
2 stops28h 59m
Alaska Airlines
Tue 9/83:14 pm
ONT
- BIL
1 stop7h 15m
Alaska Airlines
Deal found 7/12![Alaska Airlines logo]()
$402
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.
Wed 9/236:14 am
BIL
- ONT
1 stop6h 02m
Alaska Airlines
Sun 9/276:02 am
ONT
- BIL
1 stop16h 27m
Alaska Airlines
Deal found 7/9![Alaska Airlines logo]()
$417
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/85:07 am
BIL
- ONT
2 stops8h 05m
United Airlines
Fri 8/145:00 am
ONT
- BIL
1 stop7h 21m
United Airlines
Deal found 7/8![United Airlines logo]()
$471
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.
Fri 8/283:42 pm
BIL
- ONT
1 stop5h 42m
Alaska Airlines
Sat 8/296:05 pm
ONT
- BIL
2 stops16h 26m
Alaska Airlines
Deal found 7/9![Alaska Airlines logo]()
$427
Last-minute flights from Billings to OntarioDiscover last-minute flight deals from Billings to Ontario. Data last updated July 13, 2026 and is based on user searches.
Discover last-minute flight deals from Billings to Ontario. Data last updated July 13, 2026 and is based on user searches.
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.
Tue 8/45:20 am
BIL
- ONT
1 stop4h 32m
Delta
Sat 8/155:05 pm
ONT
- BIL
1 stop4h 48m
Delta
Deal found 7/10![Delta logo]()
$359
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.
Tue 8/45:20 am
BIL
- ONT
1 stop4h 32m
Delta
Sun 8/161:06 pm
ONT
- BIL
1 stop8h 19m
Delta
Deal found 7/10![Delta logo]()
$429
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.
Wed 8/55:20 am
BIL
- ONT
1 stop4h 32m
Delta
Wed 8/125:05 pm
ONT
- BIL
1 stop4h 20m
Delta
Deal found 7/9![Delta logo]()
$311
This Alaska Airlines 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/66:00 am
BIL
- ONT
1 stop8h 09m
Alaska Airlines
Mon 8/175:26 pm
ONT
- BIL
1 stop5h 25m
Alaska Airlines
Deal found 7/10![Alaska Airlines logo]()
$421
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.
Fri 8/75:20 am
BIL
- ONT
1 stop4h 32m
Delta
Tue 8/115:05 pm
ONT
- BIL
1 stop4h 20m
Delta
Deal found 7/10![Delta logo]()
$361
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.
Fri 8/75:20 am
BIL
- ONT
1 stop4h 32m
Delta
Fri 8/145:05 pm
ONT
- BIL
1 stop4h 20m
Delta
Deal found 7/10![Delta logo]()
$411
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.
Mon 8/1010:00 am
BIL
- ONT
1 stop6h 54m
Multiple Airlines
Sun 8/164:09 pm
ONT
- BIL
1 stop16h 01m
Multiple Airlines
Deal found 7/13![Multiple Airlines logo]()
$319
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.
Tue 8/117:22 pm
BIL
- ONT
1 stop16h 52m
Alaska Airlines
Mon 8/179:20 pm
ONT
- BIL
1 stop14h 45m
Alaska Airlines
Deal found 7/9![Alaska Airlines logo]()
$336
This Trip.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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/243:42 pm
BIL
- ONT
1 stop5h 42m
Alaska Airlines
Mon 8/313:07 pm
ONT
- BIL
1 stop7h 22m
Alaska Airlines
Deal found 7/13![Alaska Airlines logo]()
$346
This Alaska Airlines 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/283:42 pm
BIL
- ONT
1 stop5h 42m
Alaska Airlines
Sat 8/297:12 am
ONT
- BIL
1 stop6h 50m
Alaska Airlines
Deal found 7/8![Alaska Airlines logo]()
$409
One-way flights from Billings to OntarioSearch for one-way flight options from Billings to Ontario. Find affordable one-way fares based on user searches. Data last updated July 13, 2026.
Search for one-way flight options from Billings to Ontario. Find affordable one-way fares based on user searches. Data last updated July 13, 2026.
This Delta deal was found by Cheapflights users on 7/11. 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.
Tue 8/115:20 am
BIL
- ONT
1 stop4h 32m
Delta
Deal found 7/11![Delta logo]()
$156
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.
Thu 9/246:14 am
BIL
- ONT
1 stop6h 02m
Alaska Airlines
Deal found 7/12![Alaska Airlines logo]()
$181
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 9/126:33 pm
BIL
- ONT
1 stop4h 31m
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.
Fri 9/116:33 pm
BIL
- ONT
1 stop4h 31m
Delta
Deal found 7/11![Delta logo]()
$206
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 9/126:14 am
BIL
- ONT
2 stops12h 04m
Alaska Airlines
Deal found 7/11![Alaska Airlines logo]()
$242
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 8/115:07 am
BIL
- ONT
2 stops8h 05m
United Airlines
Deal found 7/11![United Airlines logo]()
$249
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/245:00 am
BIL
- ONT
2 stops8h 18m
United Airlines
Deal found 7/8![United Airlines logo]()
$251
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.
Sun 9/207:29 pm
BIL
- ONT
1 stop16h 47m
Alaska Airlines
Deal found 7/11![Alaska Airlines logo]()
$266
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 July 13, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $250 (Kiwi.com) |
One-way from | $156 (Delta) |
Popular in | May |
Cheapest in | June |
Average price | $524 |
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 July 13, 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
Cheapest round-trip
BillingsOntario
BIL - ONT
BILONT
Billings Logan Intl
Mon 8/10
10:00 am-12:48 pm
2 stops51h 48m
Ontario
Sun 8/16
4:09 pm-9:10 am
1 stop16h 01m
$323
BillingsOntario
BIL - ONT
BILONT
Billings Logan Intl
Fri 10/9
10:22 pm-10:21 am
1 stop12h 59m
Ontario
Mon 10/12
11:16 am-8:02 pm
1 stop7h 46m
$344
Quickest round-trip
BillingsOntario
BIL - ONT
BILONT
Billings Logan Intl
Mon 8/10
5:20 am-8:52 am
1 stop4h 32m
Ontario
Wed 8/12
5:05 pm-10:25 pm
1 stop4h 20m
$361
BillingsOntario
BIL - ONT
BILONT
Billings Logan Intl
Tue 9/22
6:14 am-11:16 am
1 stop6h 02m
Ontario
Sun 9/27
7:12 am-11:29 pm
2 stops15h 17m
$397
BillingsOntario
BIL - ONT
BILONT
Billings Logan Intl
Fri 9/4
12:11 pm-4:10 pm
2 stops28h 59m
Ontario
Tue 9/8
3:14 pm-11:29 pm
1 stop7h 15m
$402
BillingsOntario
BIL - ONT
BILONT
Billings Logan Intl
Wed 9/23
6:14 am-11:16 am
1 stop6h 02m
Ontario
Sun 9/27
6:02 am-11:29 pm
1 stop16h 27m
$417
BillingsOntario
BIL - ONT
BILONT
Billings Logan Intl
Fri 9/4
2:29 pm-10:59 pm
2 stops9h 30m
Ontario
Tue 9/8
9:01 am-9:00 pm
2 stops10h 59m
$419
BillingsOntario
BIL - ONT
BILONT
Billings Logan Intl
Fri 8/28
3:42 pm-8:24 pm
1 stop5h 42m
Ontario
Sat 8/29
6:05 pm-11:31 am
2 stops16h 26m
$427
BillingsOntario
BIL - ONT
BILONT
Billings Logan Intl
Sat 8/8
5:07 am-12:12 pm
2 stops8h 05m
Ontario
Fri 8/14
5:00 am-1:21 pm
1 stop7h 21m
$471
Cheapest one-way
BillingsOntario
BIL - ONT
BILONT
Billings Logan Intl
Thu 9/24
6:14 am-11:16 am
1 stop6h 02m
$181
Showing 1-10 of 14 resultsSorted by cheapest first
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 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 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.
BIL-ONT
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 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 July 13, 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.
Entertainment
7.8
Food
7.2
Comfort
7.8
Overall
7.8
Crew
8.5
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
TUS - LAX
Entertainment
7.8
Food
7.2
Comfort
7.8
Overall
7.8
Crew
8.5
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
TUS - LAX
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.
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Alternative routes for Billings to Ontario
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Complete your trip to Ontario by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Billings to Ontario by cabin class
Find flights from Billings to Ontario, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Other flights to Ontario
Explore flights to Ontario departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on July 13, 2026.
Billings and Ontario flights
Browse other Billings and Ontario flight options. Last updated on July 13, 2026.
Other flights from Billings
Browse through other flights departing from Billings. 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 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 July 13, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$180 | Average$409 | FlexibilityNo cancel fee | On-timeN/A |