$230+ 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 11/23. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BIL
Nov 25 — Dec 21
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
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 October 26, 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 October 26, 2026.
This Alaska Airlines deal was found by Cheapflights users on 10/21. 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 11/104:09 pm -
1 stop5h 34m
Wed 11/1111:55 am -
1 stop7h 22m
Deal found 10/21![Alaska Airlines logo]()
$410
This Expedia deal was found by Cheapflights users on 10/22. 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 11/94:09 pm -
1 stop5h 34m
Fri 11/2012:01 pm -
1 stop9h 02m
Deal found 10/22![Alaska Airlines logo]()
$436
This Expedia deal was found by Cheapflights users on 10/25. 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.
Tue 11/248:59 pm -
1 stop25h 59m
Tue 12/17:01 am -
1 stop10h 04m
Deal found 10/25![Alaska Airlines logo]()
$460
This Expedia deal was found by Cheapflights users on 10/26. 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 11/97:13 pm -
1 stop15h 02m
Fri 11/137:18 am -
1 stop8h 55m
Deal found 10/26![Alaska Airlines logo]()
$461
This United Airlines deal was found by Cheapflights users on 10/26. 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 11/101:29 pm -
1 stop6h 45m
Sat 11/145:00 am -
2 stops8h 29m
Deal found 10/26![United Airlines logo]()
$466
This United Airlines deal was found by Cheapflights users on 10/26. 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.
Mon 11/95:00 am -
1 stop7h 29m
Fri 11/132:42 pm -
2 stops9h 06m
Deal found 10/26![United Airlines logo]()
$483
This United Airlines deal was found by Cheapflights users on 10/21. 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 11/101:29 pm -
1 stop6h 45m
Wed 11/115:00 am -
2 stops8h 29m
Deal found 10/21![United Airlines logo]()
$491
This United Airlines deal was found by Cheapflights users on 10/22. 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.
Mon 11/95:00 am -
1 stop7h 29m
Fri 11/204:00 pm -
1 stop5h 51m
Deal found 10/22![United Airlines logo]()
$504
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 October 26, 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 October 26, 2026.
This Alaska Airlines deal was found by Cheapflights users on 10/21. 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 11/104:09 pm -
1 stop5h 34m
Wed 11/1111:55 am -
1 stop7h 22m
Deal found 10/21![Alaska Airlines logo]()
$410
This United Airlines deal was found by Cheapflights users on 10/22. 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 1/271:42 pm -
1 stop6h 33m
Sat 1/307:00 am -
2 stops11h 35m
Deal found 10/22![United Airlines logo]()
$414
This Delta deal was found by Cheapflights users on 10/26. 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 11/105:04 pm -
1 stop4h 16m
Sat 11/146:29 pm -
1 stop4h 47m
Deal found 10/26![Delta logo]()
$461
This Expedia deal was found by Cheapflights users on 10/23. 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 11/94:09 pm -
1 stop5h 34m
Fri 11/2012:01 pm -
1 stop9h 02m
Deal found 10/23![Alaska Airlines logo]()
$436
This United Airlines deal was found by Cheapflights users on 10/26. 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 11/101:29 pm -
1 stop6h 45m
Sat 11/145:00 am -
2 stops8h 29m
Deal found 10/26![United Airlines logo]()
$466
This United Airlines deal was found by Cheapflights users on 10/21. 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 11/101:29 pm -
1 stop6h 45m
Wed 11/115:00 am -
2 stops8h 29m
Deal found 10/21![United Airlines logo]()
$491
This Alaska Airlines deal was found by Cheapflights users on 10/21. 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.
Mon 12/213:59 pm -
1 stop6h 31m
Tue 1/57:00 am -
1 stop28h 38m
Deal found 10/21![Alaska Airlines logo]()
$511
Last-minute flights from Ontario to BillingsDiscover last-minute flight deals from Ontario to Billings. Data last updated October 26, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Billings. Data last updated October 26, 2026 and is based on user searches.
This Expedia deal was found by Cheapflights users on 10/22. 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 11/94:09 pm -
1 stop5h 34m
Fri 11/2012:01 pm -
1 stop9h 02m
Deal found 10/22![Alaska Airlines logo]()
$436
This Expedia deal was found by Cheapflights users on 10/26. 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 11/97:13 pm -
1 stop15h 02m
Fri 11/137:18 am -
1 stop8h 55m
Deal found 10/26![Alaska Airlines logo]()
$461
This United Airlines deal was found by Cheapflights users on 10/26. 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.
Mon 11/95:00 am -
1 stop7h 29m
Fri 11/132:42 pm -
2 stops9h 06m
Deal found 10/26![United Airlines logo]()
$483
This United Airlines deal was found by Cheapflights users on 10/22. 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.
Mon 11/95:00 am -
1 stop7h 29m
Fri 11/204:00 pm -
1 stop5h 51m
Deal found 10/22![United Airlines logo]()
$504
This Alaska Airlines deal was found by Cheapflights users on 10/21. 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 11/104:09 pm -
1 stop5h 34m
Wed 11/1111:55 am -
1 stop7h 22m
Deal found 10/21![Alaska Airlines logo]()
$410
This United Airlines deal was found by Cheapflights users on 10/26. 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 11/101:29 pm -
1 stop6h 45m
Sat 11/145:00 am -
2 stops8h 29m
Deal found 10/26![United Airlines logo]()
$466
This United Airlines deal was found by Cheapflights users on 10/21. 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 11/101:29 pm -
1 stop6h 45m
Wed 11/115:00 am -
2 stops8h 29m
Deal found 10/21![United Airlines logo]()
$491
This Expedia deal was found by Cheapflights users on 10/25. 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.
Tue 11/248:59 pm -
1 stop25h 59m
Tue 12/17:01 am -
1 stop10h 04m
Deal found 10/25![Alaska Airlines logo]()
$460
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 October 26, 2026.
Search for one-way flight options from Ontario to Billings. Find affordable one-way fares based on user searches. Data last updated October 26, 2026.
This Alaska Airlines deal was found by Cheapflights users on 10/21. 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.
Mon 11/234:01 pm -
1 stop6h 57m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/21![Alaska Airlines logo]()
$230
This United Airlines deal was found by Cheapflights users on 10/24. 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 12/245:00 am -
1 stop7h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/24![United Airlines logo]()
$231
This United Airlines deal was found by Cheapflights users on 10/23. 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.
Sun 11/15:00 am -
1 stop7h 29m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/23![United Airlines logo]()
$306
This Alaska Airlines deal was found by Cheapflights users on 10/24. 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 12/243:59 pm -
2 stops21h 59m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/24![Alaska Airlines logo]()
$308
This United Airlines deal was found by Cheapflights users on 10/21. 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.
Mon 11/239:25 am -
2 stops10h 49m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/21![United Airlines logo]()
$366
This American Airlines deal was found by Cheapflights users on 10/23. 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 11/19:29 am -
2 stops10h 11m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/23![American Airlines logo]()
$375
This Alaska Airlines deal was found by Cheapflights users on 10/25. 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.
Sun 12/208:59 pm -
1 stop25h 31m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/25![Alaska Airlines logo]()
$407
This Kiwi.com deal was found by Cheapflights users on 10/23. 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 11/12:23 pm -
3 stops18h 36m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/23![Multiple Airlines logo]()
$611
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 October 26, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $409 (United Airlines) |
One-way from | $230 (Alaska Airlines) |
Popular in | April |
Cheapest in | February |
Average price | $555 |
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 October 26, 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
Mon 11/23
4:01 pm-11:58 pm
1 stop6h 57m
Billings Logan Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$230
OntarioBillings
ONT Ontario - BIL Billings Logan Intl
ONTBIL
Ontario
Thu 12/24
5:00 am-1:25 pm
1 stop7h 25m
Billings Logan Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$231
OntarioBillings
ONT Ontario - BIL Billings Logan Intl
ONTBIL
Ontario
Sun 11/1
5:00 am-1:29 pm
1 stop7h 29m
Billings Logan Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$306
OntarioBillings
ONT Ontario - BIL Billings Logan Intl
ONTBIL
Ontario
Thu 12/24
3:59 pm-2:58 pm
2 stops21h 59m
Billings Logan Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$308
OntarioBillings
ONT Ontario - BIL Billings Logan Intl
ONTBIL
Ontario
Mon 11/23
9:25 am-9:14 pm
2 stops10h 49m
Billings Logan Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$366
OntarioBillings
ONT Ontario - BIL Billings Logan Intl
ONTBIL
Ontario
Sun 12/20
8:59 pm-11:30 pm
1 stop25h 31m
Billings Logan Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$407
OntarioBillings
ONT Ontario - BIL Billings Logan Intl
ONTBIL
Ontario
Tue 11/10
4:09 pm-10:43 pm
1 stop5h 34m
Billings Logan Intl
Wed 11/11
11:55 am-6:17 pm
1 stop7h 22m
$410
OntarioBillings
ONT Ontario - BIL Billings Logan Intl
ONTBIL
Ontario
Wed 1/27
1:42 pm-9:15 pm
1 stop6h 33m
Billings Logan Intl
Sat 1/30
7:00 am-5:35 pm
2 stops11h 35m
$414
OntarioBillings
ONT Ontario - BIL Billings Logan Intl
ONTBIL
Ontario
Mon 11/9
4:09 pm-10:43 pm
1 stop5h 34m
Billings Logan Intl
Fri 11/20
12:01 pm-8:03 pm
1 stop9h 02m
$436
OntarioBillings
ONT Ontario - BIL Billings Logan Intl
ONTBIL
Ontario
Tue 11/10
5:04 pm-10:20 pm
1 stop4h 16m
Billings Logan Intl
Sat 11/14
6:29 pm-10:16 pm
1 stop4h 47m
$461
Showing 1-10 of 14 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 October.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 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 October 26, 2026.
Read through reviews of airlines operating flights from Ontario to Billings, such as Alaska Airlines,Delta, andUnited Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Overall
7.9
Food
7.0
Entertainment
7.0
Crew
8.5
Comfort
7.8
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Overall
7.9
Food
7.0
Entertainment
7.0
Crew
8.5
Comfort
7.8
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Overall
7.9
Food
7.0
Entertainment
7.0
Crew
8.5
Comfort
7.8
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Overall
7.9
Food
7.0
Entertainment
7.0
Crew
8.5
Comfort
7.8
Boarding
8.1
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
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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 October 26, 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 October 26, 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 October 26, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 3 airlines flying from Ontario to Billings
Discover the top 3 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 October 26, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$260 | Average$365 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$269 | Average$619 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$279 | Average$415 | FlexibilityNo cancel fee | On-time69% |