$211+ Cheap flights from Ontario to Billings (ONT - BIL)
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 10/3. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BIL
Oct 10 — Oct 171
Round-trip
1 adult, Economy
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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
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Best
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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 September 10, 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 September 10, 2026.
This Trip.com deal was found by Cheapflights users on 9/8. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2911:13 am -
1 stop6h 39m
Wed 11/43:32 pm -
1 stop7h 17m
Deal found 9/8![Alaska Airlines logo]()
$319
This Booking.com deal was found by Cheapflights users on 9/8. 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.
Mon 10/265:30 pm -
1 stop20h 34m
Mon 11/25:12 pm -
1 stop6h 54m
Deal found 9/8![Alaska Airlines logo]()
$321
This Alaska Airlines deal was found by Cheapflights users on 9/9. 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 11/117:15 am -
1 stop6h 37m
Sat 11/1411:55 am -
1 stop7h 22m
Deal found 9/9![Alaska Airlines logo]()
$357
This Alaska Airlines deal was found by Cheapflights users on 9/6. 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.
Thu 10/152:13 pm -
1 stop8h 37m
Sun 10/187:41 am -
1 stop27h 36m
Deal found 9/6![Alaska Airlines logo]()
$363
This Alaska Airlines deal was found by Cheapflights users on 9/9. 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 11/137:13 pm -
1 stop15h 02m
Sun 11/155:12 pm -
1 stop6h 54m
Deal found 9/9![Alaska Airlines logo]()
$378
This Delta deal was found by Cheapflights users on 9/7. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/75:03 pm -
1 stop4h 22m
Wed 10/145:20 am -
1 stop4h 35m
Deal found 9/7![Delta logo]()
$380
This Delta deal was found by Cheapflights users on 9/7. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/299:45 am -
1 stop7h 04m
Sun 11/16:29 pm -
1 stop4h 42m
Deal found 9/7![Delta logo]()
$391
This Alaska Airlines deal was found by Cheapflights users on 9/9. 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 9/233:14 pm -
1 stop7h 15m
Fri 10/23:42 pm -
1 stop5h 42m
Deal found 9/9![Alaska Airlines logo]()
$406
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 September 10, 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 September 10, 2026.
This Booking.com deal was found by Cheapflights users on 9/8. 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.
Mon 10/265:30 pm -
1 stop20h 34m
Mon 11/25:12 pm -
1 stop6h 54m
Deal found 9/8![Alaska Airlines logo]()
$321
This United Airlines deal was found by Cheapflights users on 9/9. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 1/2611:20 am -
2 stops8h 59m
Wed 2/32:42 pm -
1 stop6h 38m
Deal found 9/9![United Airlines logo]()
$346
This Alaska Airlines deal was found by Cheapflights users on 9/7. 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.
Wed 11/117:15 am -
1 stop6h 37m
Sat 11/1411:55 am -
1 stop7h 22m
Deal found 9/7![Alaska Airlines logo]()
$358
This Alaska Airlines deal was found by Cheapflights users on 9/9. 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 10/232:13 pm -
1 stop20h 12m
Sun 10/257:32 pm -
1 stop15h 45m
Deal found 9/9![Alaska Airlines logo]()
$378
This United Airlines deal was found by Cheapflights users on 9/8. 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 11/111:35 pm -
2 stops7h 55m
Sat 11/145:00 am -
2 stops11h 33m
Deal found 9/8![United Airlines logo]()
$469
This Booking.com deal was found by Cheapflights users on 9/5. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/26:14 pm -
1 stop19h 50m
Sun 10/47:32 pm -
1 stop15h 45m
Deal found 9/5![Alaska Airlines logo]()
$421
Last-minute flights from Ontario to BillingsDiscover last-minute flight deals from Ontario to Billings. Data last updated September 10, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Billings. Data last updated September 10, 2026 and is based on user searches.
This Alaska Airlines deal was found by Cheapflights users on 9/9. 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 9/233:14 pm -
1 stop7h 15m
Fri 10/23:42 pm -
1 stop5h 42m
Deal found 9/9![Alaska Airlines logo]()
$406
This Delta deal was found by Cheapflights users on 9/10. 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.
Wed 9/231:04 pm -
1 stop3h 49m
Mon 9/285:20 am -
1 stop4h 42m
Deal found 9/10![Delta logo]()
$421
This Delta deal was found by Cheapflights users on 9/9. 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.
Thu 10/11:04 pm -
1 stop3h 49m
Sun 10/45:20 am -
1 stop4h 42m
Deal found 9/9![Delta logo]()
$410
This Delta deal was found by Cheapflights users on 9/7. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/75:03 pm -
1 stop4h 22m
Wed 10/145:20 am -
1 stop4h 35m
Deal found 9/7![Delta logo]()
$380
This Alaska Airlines deal was found by Cheapflights users on 9/6. 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.
Thu 10/152:13 pm -
1 stop8h 37m
Sun 10/187:41 am -
1 stop27h 36m
Deal found 9/6![Alaska Airlines logo]()
$363
This Alaska Airlines deal was found by Cheapflights users on 9/9. 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 10/232:13 pm -
1 stop20h 12m
Sun 10/257:32 pm -
1 stop15h 45m
Deal found 9/9![Alaska Airlines logo]()
$378
This Booking.com deal was found by Cheapflights users on 9/8. 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.
Mon 10/265:30 pm -
1 stop20h 34m
Mon 11/25:12 pm -
1 stop6h 54m
Deal found 9/8![Alaska Airlines logo]()
$321
This Trip.com deal was found by Cheapflights users on 9/8. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2911:13 am -
1 stop6h 39m
Wed 11/43:32 pm -
1 stop7h 17m
Deal found 9/8![Alaska Airlines logo]()
$319
This Delta deal was found by Cheapflights users on 9/7. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/299:45 am -
1 stop7h 04m
Sun 11/16:29 pm -
1 stop4h 42m
Deal found 9/7![Delta logo]()
$391
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 September 10, 2026.
Search for one-way flight options from Ontario to Billings. Find affordable one-way fares based on user searches. Data last updated September 10, 2026.
This American Airlines deal was found by Cheapflights users on 9/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/312:37 pm -
1 stop8h 33m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![American Airlines logo]()
$211
This United Airlines deal was found by Cheapflights users on 9/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/311:10 am -
2 stops10h 41m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![United Airlines logo]()
$216
This Booking.com deal was found by Cheapflights users on 9/10. 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.
Mon 9/216:14 pm -
1 stop19h 48m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Alaska Airlines logo]()
$241
This Kiwi.com deal was found by Cheapflights users on 9/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/35:31 pm -
3 stops41h 08m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Multiple Airlines logo]()
$362
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 September 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $319 (Trip.com) |
One-way from | $211 (American Airlines) |
Popular in | April |
Cheapest in | February |
Average price | $507 |
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 7,457,451 searches. Data last updated September 10, 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 Ontario - BIL Billings Logan Intl
ONTBIL
Ontario
Sat 10/3
12:37 pm-10:10 pm
1 stop8h 33m
Billings Logan Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$211
OntarioBillings
ONT Ontario - BIL Billings Logan Intl
ONTBIL
Ontario
Sat 10/3
11:10 am-10:51 pm
2 stops10h 41m
Billings Logan Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$216
OntarioBillings
ONT Ontario - BIL Billings Logan Intl
ONTBIL
Ontario
Mon 10/26
5:30 pm-3:04 pm
1 stop20h 34m
Billings Logan Intl
Mon 11/2
5:12 pm-11:06 pm
1 stop6h 54m
$321
OntarioBillings
ONT Ontario - BIL Billings Logan Intl
ONTBIL
Ontario
Tue 1/26
11:20 am-9:19 pm
2 stops8h 59m
Billings Logan Intl
Wed 2/3
2:42 pm-8:20 pm
1 stop6h 38m
$346
OntarioBillings
ONT Ontario - BIL Billings Logan Intl
ONTBIL
Ontario
Wed 11/11
7:15 am-2:52 pm
1 stop6h 37m
Billings Logan Intl
Sat 11/14
11:55 am-6:17 pm
1 stop7h 22m
$358
OntarioBillings
ONT Ontario - BIL Billings Logan Intl
ONTBIL
Ontario
Sat 10/3
5:31 pm-11:39 am
3 stops41h 08m
Billings Logan Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$362
OntarioBillings
ONT Ontario - BIL Billings Logan Intl
ONTBIL
Ontario
Fri 10/23
2:13 pm-11:25 am
1 stop20h 12m
Billings Logan Intl
Sun 10/25
7:32 pm-10:17 am
1 stop15h 45m
$378
OntarioBillings
ONT Ontario - BIL Billings Logan Intl
ONTBIL
Ontario
Fri 10/2
6:14 pm-3:04 pm
1 stop19h 50m
Billings Logan Intl
Sun 10/4
7:32 pm-10:17 am
1 stop15h 45m
$421
OntarioBillings
ONT Ontario - BIL Billings Logan Intl
ONTBIL
Ontario
Wed 11/11
1:35 pm-10:30 pm
2 stops7h 55m
Billings Logan Intl
Sat 11/14
5:00 am-3:33 pm
2 stops11h 33m
$469
Sorted 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 September.
| 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.
Cheapflights Insights
Everything you need to know about your flight from Ontario to Billings
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 September 10, 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.
Food
7.0
Comfort
7.8
Boarding
8.1
Entertainment
7.0
Overall
7.9
Crew
8.5
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Food
7.0
Comfort
7.8
Boarding
8.1
Entertainment
7.0
Overall
7.9
Crew
8.5
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Food
7.0
Comfort
7.8
Boarding
8.1
Entertainment
7.0
Overall
7.9
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.
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Complete your trip
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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 September 10, 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 September 10, 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 September 10, 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 7,457,451 searches. Data last updated September 10, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$260 | Average$364 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$269 | Average$625 | FlexibilityNo cancel fee | On-time75% |