$151+ Cheap flights from Billings to Ontario (BIL - ONT)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/4. Fares are subject to change and may not be available on all flights or dates of travel.
BIL — ONT
May 10 — May 171
Round-trip
1 adult, Economy
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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
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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 April 10, 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 April 10, 2026.
This Kiwi.com deal was found by Cheapflights users on 4/8. 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.
Mon 5/410:34 am
BIL
- ONT
1 stop10h 30m
Multiple Airlines
Thu 5/74:04 pm
ONT
- BIL
1 stop16h 10m
Multiple Airlines
Deal found 4/8![Multiple Airlines logo]()
$151
This Kiwi.com deal was found by Cheapflights users on 4/8. 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.
Mon 5/410:34 am
BIL
- ONT
1 stop10h 30m
Multiple Airlines
Sun 5/104:04 pm
ONT
- BIL
1 stop16h 40m
Multiple Airlines
Deal found 4/8![Multiple Airlines logo]()
$179
This Kiwi.com deal was found by Cheapflights users on 4/6. 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.
Wed 5/62:41 pm
BIL
- ONT
2 stops29h 51m
Multiple Airlines
Sun 5/104:04 pm
ONT
- BIL
1 stop16h 40m
Multiple Airlines
Deal found 4/6![Multiple Airlines logo]()
$240
This Kiwi.com deal was found by Cheapflights users on 4/8. 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 5/810:04 am
BIL
- ONT
1 stop10h 28m
Multiple Airlines
Sun 5/1011:36 am
ONT
- BIL
1 stop21h 08m
Multiple Airlines
Deal found 4/8![Multiple Airlines logo]()
$248
This Delta deal was found by Cheapflights users on 4/8. 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.
Mon 5/46:18 pm
BIL
- ONT
1 stop6h 26m
Delta
Mon 5/114:57 pm
ONT
- BIL
1 stop4h 55m
Delta
Deal found 4/8![Delta logo]()
$301
This Delta deal was found by Cheapflights users on 4/8. 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 5/55:20 am
BIL
- ONT
2 stops9h 19m
Delta
Mon 5/114:57 pm
ONT
- BIL
1 stop4h 55m
Delta
Deal found 4/8![Delta logo]()
$306
This Delta deal was found by Cheapflights users on 4/8. 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.
Mon 5/46:18 pm
BIL
- ONT
1 stop6h 26m
Delta
Sat 5/96:00 am
ONT
- BIL
1 stop3h 54m
Delta
Deal found 4/8![Delta logo]()
$320
This Delta deal was found by Cheapflights users on 4/8. 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 8/45:18 am
BIL
- ONT
1 stop4h 27m
Delta
Mon 8/105:05 pm
ONT
- BIL
1 stop4h 22m
Delta
Deal found 4/8![Delta logo]()
$321
This Delta deal was found by Cheapflights users on 4/8. 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 5/55:20 am
BIL
- ONT
2 stops9h 19m
Delta
Sat 5/95:55 pm
ONT
- BIL
1 stop3h 57m
Delta
Deal found 4/8![Delta logo]()
$325
This Delta deal was found by Cheapflights users on 4/6. 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 5/66:18 pm
BIL
- ONT
1 stop6h 25m
Delta
Sun 5/104:57 pm
ONT
- BIL
1 stop4h 55m
Delta
Deal found 4/6![Delta logo]()
$331
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 April 10, 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 April 10, 2026.
This Delta deal was found by Cheapflights users on 4/6. 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 5/66:18 pm
BIL
- ONT
1 stop6h 25m
Delta
Sun 5/104:57 pm
ONT
- BIL
1 stop4h 55m
Delta
Deal found 4/6![Delta logo]()
$331
This Alaska Airlines deal was found by Cheapflights users on 4/7. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/212:47 pm
BIL
- ONT
1 stop12h 01m
Alaska Airlines
Tue 5/55:56 pm
ONT
- BIL
1 stop18h 30m
Alaska Airlines
Deal found 4/7![Alaska Airlines logo]()
$363
This United Airlines deal was found by Cheapflights users on 4/8. 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 5/25:05 am
BIL
- ONT
2 stops8h 17m
United Airlines
Tue 5/55:00 am
ONT
- BIL
1 stop7h 23m
United Airlines
Deal found 4/8![United Airlines logo]()
$405
This Delta deal was found by Cheapflights users on 4/6. 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.
Thu 5/145:30 am
BIL
- ONT
1 stop4h 23m
Delta
Mon 5/184:57 pm
ONT
- BIL
1 stop4h 55m
Delta
Deal found 4/6![Delta logo]()
$351
This Delta deal was found by Cheapflights users on 4/8. 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.
Thu 5/75:30 am
BIL
- ONT
1 stop4h 23m
Delta
Sat 5/96:00 am
ONT
- BIL
1 stop3h 54m
Delta
Deal found 4/8![Delta logo]()
$374
This United Airlines deal was found by Cheapflights users on 4/8. 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.
Fri 5/85:05 am
BIL
- ONT
2 stops8h 17m
United Airlines
Fri 5/155:00 am
ONT
- BIL
1 stop7h 23m
United Airlines
Deal found 4/8![United Airlines logo]()
$430
This Alaska Airlines deal was found by Cheapflights users on 4/6. 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 4/257:00 am
BIL
- ONT
1 stop8h 32m
Alaska Airlines
Wed 4/297:00 am
ONT
- BIL
1 stop5h 26m
Alaska Airlines
Deal found 4/6![Alaska Airlines logo]()
$435
This United Airlines deal was found by Cheapflights users on 4/8. 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 5/62:30 pm
BIL
- ONT
2 stops9h 29m
United Airlines
Sat 5/910:43 am
ONT
- BIL
2 stops9h 14m
United Airlines
Deal found 4/8![United Airlines logo]()
$439
This Alaska Airlines deal was found by Cheapflights users on 4/8. 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.
Wed 5/62:06 pm
BIL
- ONT
2 stops10h 42m
Alaska Airlines
Fri 5/83:26 pm
ONT
- BIL
2 stops21h 00m
Alaska Airlines
Deal found 4/8![Alaska Airlines logo]()
$463
This Delta deal was found by Cheapflights users on 4/8. 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 5/55:20 am
BIL
- ONT
2 stops9h 19m
Delta
Sun 5/105:50 pm
ONT
- BIL
2 stops16h 04m
Delta
Deal found 4/8![Delta logo]()
$453
This Delta deal was found by Cheapflights users on 4/9. 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.
Fri 4/245:20 am
BIL
- ONT
2 stops9h 19m
Delta
Sun 4/2611:53 am
ONT
- BIL
2 stops9h 31m
Delta
Deal found 4/9![Delta logo]()
$479
Last-minute flights from Billings to OntarioDiscover last-minute flight deals from Billings to Ontario. Data last updated April 10, 2026 and is based on user searches.
Discover last-minute flight deals from Billings to Ontario. Data last updated April 10, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 4/8. 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.
Mon 5/410:34 am
BIL
- ONT
1 stop10h 30m
Multiple Airlines
Thu 5/74:04 pm
ONT
- BIL
1 stop16h 10m
Multiple Airlines
Deal found 4/8![Multiple Airlines logo]()
$151
This Kiwi.com deal was found by Cheapflights users on 4/8. 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.
Mon 5/410:34 am
BIL
- ONT
1 stop10h 30m
Multiple Airlines
Sun 5/104:04 pm
ONT
- BIL
1 stop16h 40m
Multiple Airlines
Deal found 4/8![Multiple Airlines logo]()
$179
This Delta deal was found by Cheapflights users on 4/8. 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.
Mon 5/46:18 pm
BIL
- ONT
1 stop6h 26m
Delta
Mon 5/114:57 pm
ONT
- BIL
1 stop4h 55m
Delta
Deal found 4/8![Delta logo]()
$301
This Delta deal was found by Cheapflights users on 4/8. 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.
Mon 5/46:18 pm
BIL
- ONT
1 stop6h 26m
Delta
Sat 5/96:00 am
ONT
- BIL
1 stop3h 54m
Delta
Deal found 4/8![Delta logo]()
$320
This Delta deal was found by Cheapflights users on 4/8. 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 5/55:20 am
BIL
- ONT
2 stops9h 19m
Delta
Mon 5/114:57 pm
ONT
- BIL
1 stop4h 55m
Delta
Deal found 4/8![Delta logo]()
$306
This Delta deal was found by Cheapflights users on 4/8. 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 5/55:20 am
BIL
- ONT
2 stops9h 19m
Delta
Sat 5/95:55 pm
ONT
- BIL
1 stop3h 57m
Delta
Deal found 4/8![Delta logo]()
$325
This Delta deal was found by Cheapflights users on 4/8. 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 5/55:20 am
BIL
- ONT
2 stops9h 19m
Delta
Sun 5/104:57 pm
ONT
- BIL
1 stop4h 55m
Delta
Deal found 4/8![Delta logo]()
$336
This Kiwi.com deal was found by Cheapflights users on 4/6. 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.
Wed 5/62:41 pm
BIL
- ONT
2 stops29h 51m
Multiple Airlines
Sun 5/104:04 pm
ONT
- BIL
1 stop16h 40m
Multiple Airlines
Deal found 4/6![Multiple Airlines logo]()
$240
This Delta deal was found by Cheapflights users on 4/6. 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 5/66:18 pm
BIL
- ONT
1 stop6h 25m
Delta
Sun 5/104:57 pm
ONT
- BIL
1 stop4h 55m
Delta
Deal found 4/6![Delta logo]()
$331
This Kiwi.com deal was found by Cheapflights users on 4/8. 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 5/810:04 am
BIL
- ONT
1 stop10h 28m
Multiple Airlines
Sun 5/1011:36 am
ONT
- BIL
1 stop21h 08m
Multiple Airlines
Deal found 4/8![Multiple Airlines logo]()
$248
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 April 10, 2026.
Search for one-way flight options from Billings to Ontario. Find affordable one-way fares based on user searches. Data last updated April 10, 2026.
This Delta deal was found by Cheapflights users on 4/6. 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.
Thu 9/245:45 am
BIL
- ONT
1 stop4h 16m
Delta
Deal found 4/6![Delta logo]()
$151
This United Airlines deal was found by Cheapflights users on 4/7. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/247:00 am
BIL
- ONT
2 stops11h 47m
United Airlines
Deal found 4/7![United Airlines logo]()
$206
This American Airlines deal was found by Cheapflights users on 4/9. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/246:00 am
BIL
- ONT
2 stops13h 22m
American Airlines
Deal found 4/9![American Airlines logo]()
$207
This CheapOair deal was found by Cheapflights users on 4/5. 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.
Tue 4/217:56 am
BIL
- ONT
1 stop11h 17m
Alaska Airlines
Deal found 4/5![Alaska Airlines logo]()
$215
This Trip.com deal was found by Cheapflights users on 4/9. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/247:21 pm
BIL
- ONT
1 stop20h 14m
Multiple Airlines
Deal found 4/9![Multiple Airlines logo]()
$233
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 April 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $151 (Kiwi.com) |
One-way from | $151 (Delta) |
Popular in | July |
Cheapest in | June |
Average price | $360 |
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 April 10, 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
Wed 5/6
6:18 pm-11:43 pm
1 stop6h 25m
Ontario
Sun 5/10
4:57 pm-10:52 pm
1 stop4h 55m
$331
BillingsOntario
BIL - ONT
BILONT
Billings Logan Intl
Thu 5/14
5:30 am-8:53 am
1 stop4h 23m
Ontario
Mon 5/18
4:57 pm-10:52 pm
1 stop4h 55m
$351
BillingsOntario
BIL - ONT
BILONT
Billings Logan Intl
Sat 5/2
12:47 pm-11:48 pm
1 stop12h 01m
Ontario
Tue 5/5
5:56 pm-1:26 pm
1 stop18h 30m
$363
Quickest round-trip
BillingsOntario
BIL - ONT
BILONT
Billings Logan Intl
Thu 5/7
5:30 am-8:53 am
1 stop4h 23m
Ontario
Sat 5/9
6:00 am-10:54 am
1 stop3h 54m
$374
BillingsOntario
BIL - ONT
BILONT
Billings Logan Intl
Sat 5/2
5:05 am-12:22 pm
2 stops8h 17m
Ontario
Tue 5/5
5:00 am-1:23 pm
1 stop7h 23m
$405
BillingsOntario
BIL - ONT
BILONT
Billings Logan Intl
Fri 5/8
5:05 am-12:22 pm
2 stops8h 17m
Ontario
Fri 5/15
5:00 am-1:23 pm
1 stop7h 23m
$430
BillingsOntario
BIL - ONT
BILONT
Billings Logan Intl
Sat 4/25
7:00 am-2:32 pm
1 stop8h 32m
Ontario
Wed 4/29
7:00 am-1:26 pm
1 stop5h 26m
$435
BillingsOntario
BIL - ONT
BILONT
Billings Logan Intl
Wed 5/6
2:30 pm-10:59 pm
2 stops9h 29m
Ontario
Sat 5/9
10:43 am-8:57 pm
2 stops9h 14m
$439
BillingsOntario
BIL - ONT
BILONT
Billings Logan Intl
Tue 5/5
5:20 am-1:39 pm
2 stops9h 19m
Ontario
Sun 5/10
5:50 pm-10:54 am
2 stops16h 04m
$453
BillingsOntario
BIL - ONT
BILONT
Billings Logan Intl
Wed 5/6
2:06 pm-11:48 pm
2 stops10h 42m
Ontario
Fri 5/8
3:26 pm-1:26 pm
2 stops21h 00m
$463
Showing 1-10 of 16 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 April.
| 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.
Cheapflights Insights
Everything you need to know about your flight 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 April 10, 2026.
See what other customers who have flown with Delta and United Airlines 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
Overall
7.9
Comfort
7.9
Crew
8.5
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
TUS - LAX
Entertainment
7.8
Food
7.2
Overall
7.9
Comfort
7.9
Crew
8.5
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
TUS - LAX
Entertainment
7.8
Food
7.2
Overall
7.9
Comfort
7.9
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.
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.
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Alternative routes for Billings to Ontario
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Complete your trip
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 April 10, 2026.
Billings and Ontario flights
Browse other Billings and Ontario flight options. Last updated on April 10, 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 April 10, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
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 April 10, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$241 | Average$396 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$244 | Average$434 | FlexibilityNo cancel fee | On-timeN/A |