$219+ 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 11/14. Fares are subject to change and may not be available on all flights or dates of travel.
BIL — ONT
Nov 8 — Nov 151
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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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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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 October 9, 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 October 9, 2026.
This Delta deal was found by Cheapflights users on 10/6. 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.
Tue 10/275:20 am -
1 stop4h 35m
Fri 10/306:00 am -
1 stop5h 18m
Deal found 10/6![Delta logo]()
$391
This Expedia deal was found by Cheapflights users on 10/7. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/125:12 pm -
1 stop6h 54m
Mon 11/167:13 pm -
1 stop15h 02m
Deal found 10/7![Alaska Airlines logo]()
$410
This Gotogate deal was found by Cheapflights users on 10/7. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/75:12 pm -
1 stop19h 06m
Mon 11/97:13 pm -
1 stop15h 02m
Deal found 10/7![Alaska Airlines logo]()
$425
This Alaska Airlines deal was found by Cheapflights users on 10/8. 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.
Sat 12/53:32 pm -
1 stop9h 22m
Wed 12/96:00 am -
1 stop28h 24m
Deal found 10/8![Alaska Airlines logo]()
$428
This Kiwi.com deal was found by Cheapflights users on 10/8. 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 11/3010:57 am -
1 stop25h 35m
Sun 12/67:26 pm -
2 stops42h 46m
Deal found 10/8![Multiple Airlines logo]()
$453
This Priceline deal was found by Cheapflights users on 10/6. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/23:32 pm -
1 stop9h 22m
Sun 12/67:10 am -
1 stop6h 42m
Deal found 10/6![Alaska Airlines logo]()
$482
This United Airlines deal was found by Cheapflights users on 10/5. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/52:33 pm -
1 stop7h 38m
Wed 12/911:20 am -
2 stops9h 09m
Deal found 10/5![United Airlines logo]()
$494
This United Airlines deal was found by Cheapflights users on 10/6. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/177:00 am -
1 stop6h 46m
Sat 10/241:22 pm -
1 stop6h 48m
Deal found 10/6![United Airlines logo]()
$506
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 October 9, 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 October 9, 2026.
This Delta deal was found by Cheapflights users on 10/6. 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.
Tue 10/275:20 am -
1 stop4h 35m
Fri 10/306:00 am -
1 stop5h 18m
Deal found 10/6![Delta logo]()
$391
This Alaska Airlines deal was found by Cheapflights users on 10/8. 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.
Sat 12/53:32 pm -
1 stop9h 22m
Wed 12/96:00 am -
1 stop28h 24m
Deal found 10/8![Alaska Airlines logo]()
$428
This Kiwi.com deal was found by Cheapflights users on 10/8. 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 11/3010:57 am -
1 stop25h 35m
Sun 12/67:26 pm -
2 stops42h 46m
Deal found 10/8![Multiple Airlines logo]()
$453
This United Airlines deal was found by Cheapflights users on 10/5. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/52:33 pm -
1 stop7h 38m
Wed 12/911:20 am -
2 stops9h 09m
Deal found 10/5![United Airlines logo]()
$494
This Alaska Airlines deal was found by Cheapflights users on 10/7. 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.
Thu 11/125:12 pm -
1 stop6h 54m
Mon 11/164:04 pm -
2 stops23h 28m
Deal found 10/7![Alaska Airlines logo]()
$448
This Alaska Airlines deal was found by Cheapflights users on 10/8. 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.
Mon 1/411:55 am -
1 stop23h 43m
Mon 1/114:16 pm -
1 stop18h 13m
Deal found 10/8![Alaska Airlines logo]()
$515
Last-minute flights from Billings to OntarioDiscover last-minute flight deals from Billings to Ontario. Data last updated October 9, 2026 and is based on user searches.
Discover last-minute flight deals from Billings to Ontario. Data last updated October 9, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 10/6. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/177:00 am -
1 stop6h 46m
Sat 10/241:22 pm -
1 stop6h 48m
Deal found 10/6![United Airlines logo]()
$506
This Delta deal was found by Cheapflights users on 10/6. 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.
Tue 10/275:20 am -
1 stop4h 35m
Fri 10/306:00 am -
1 stop5h 18m
Deal found 10/6![Delta logo]()
$391
This Gotogate deal was found by Cheapflights users on 10/7. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/75:12 pm -
1 stop19h 06m
Mon 11/97:13 pm -
1 stop15h 02m
Deal found 10/7![Alaska Airlines logo]()
$425
This Expedia deal was found by Cheapflights users on 10/7. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/125:12 pm -
1 stop6h 54m
Mon 11/167:13 pm -
1 stop15h 02m
Deal found 10/7![Alaska Airlines logo]()
$410
This Alaska Airlines deal was found by Cheapflights users on 10/6. 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.
Fri 11/137:18 am -
1 stop16h 48m
Sun 11/157:13 pm -
1 stop15h 02m
Deal found 10/6![Alaska Airlines logo]()
$533
This Delta deal was found by Cheapflights users on 10/6. 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.
Fri 11/136:29 pm -
1 stop6h 20m
Sun 11/157:00 am -
2 stops9h 49m
Deal found 10/6![Delta logo]()
$620
This Kiwi.com deal was found by Cheapflights users on 10/8. 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 11/3010:57 am -
1 stop25h 35m
Sun 12/67:26 pm -
2 stops42h 46m
Deal found 10/8![Multiple Airlines logo]()
$453
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 October 9, 2026.
Search for one-way flight options from Billings to Ontario. Find affordable one-way fares based on user searches. Data last updated October 9, 2026.
This United Airlines deal was found by Cheapflights users on 10/7. 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.
Sat 11/142:42 pm -
1 stop7h 09m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/7![United Airlines logo]()
$219
This Alaska Airlines deal was found by Cheapflights users on 10/8. 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 11/135:12 pm -
1 stop6h 54m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/8![Alaska Airlines logo]()
$221
This United Airlines deal was found by Cheapflights users on 10/8. 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 11/135:00 am -
2 stops8h 29m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/8![United Airlines logo]()
$276
This Travelocity deal was found by Cheapflights users on 10/7. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/143:32 pm -
2 stops20h 46m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/7![Alaska Airlines logo]()
$308
This Gotogate deal was found by Cheapflights users on 10/7. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/167:32 pm -
1 stop15h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/7![Alaska Airlines logo]()
$310
This Priceline deal was found by Cheapflights users on 10/5. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/157:41 am -
1 stop6h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/5![Alaska Airlines logo]()
$396
This United Airlines deal was found by Cheapflights users on 10/7. 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.
Fri 10/162:28 pm -
2 stops9h 23m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/7![United Airlines logo]()
$475
This United Airlines deal was found by Cheapflights users on 10/5. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/152:28 pm -
2 stops9h 23m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/5![United Airlines logo]()
$544
This Kiwi.com deal was found by Cheapflights users on 10/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/1411:55 am -
3 stops48h 21m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/7![Multiple Airlines logo]()
$705
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 October 9, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $391 (Delta) |
One-way from | $219 (United Airlines) |
Popular in | June |
Cheapest in | November |
Average price | $391 |
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 7,457,451 searches. Data last updated October 9, 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 Billings Logan Intl - ONT Ontario
BILONT
Billings Logan Intl
Sat 11/14
2:42 pm-8:51 pm
1 stop7h 09m
Ontario
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$219
BillingsOntario
BIL Billings Logan Intl - ONT Ontario
BILONT
Billings Logan Intl
Fri 11/13
2:42 pm-8:51 pm
1 stop7h 09m
Ontario
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$221
BillingsOntario
BIL Billings Logan Intl - ONT Ontario
BILONT
Billings Logan Intl
Tue 10/27
5:20 am-8:55 am
1 stop4h 35m
Ontario
Fri 10/30
6:00 am-12:18 pm
1 stop5h 18m
$391
Quickest round-trip
BillingsOntario
BIL Billings Logan Intl - ONT Ontario
BILONT
Billings Logan Intl
Thu 10/15
7:41 am-1:16 pm
1 stop6h 35m
Ontario
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$396
BillingsOntario
BIL Billings Logan Intl - ONT Ontario
BILONT
Billings Logan Intl
Sat 12/5
3:32 pm-11:54 pm
1 stop9h 22m
Ontario
Wed 12/9
6:00 am-11:24 am
1 stop28h 24m
$428
BillingsOntario
BIL Billings Logan Intl - ONT Ontario
BILONT
Billings Logan Intl
Thu 11/12
5:12 pm-11:06 pm
1 stop6h 54m
Ontario
Mon 11/16
4:04 pm-4:32 pm
2 stops23h 28m
$448
BillingsOntario
BIL Billings Logan Intl - ONT Ontario
BILONT
Billings Logan Intl
Mon 11/30
10:57 am-11:32 am
1 stop25h 35m
Ontario
Sun 12/6
7:26 pm-3:12 pm
2 stops42h 46m
$453
BillingsOntario
BIL Billings Logan Intl - ONT Ontario
BILONT
Billings Logan Intl
Fri 10/16
2:28 pm-10:51 pm
2 stops9h 23m
Ontario
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$475
BillingsOntario
BIL Billings Logan Intl - ONT Ontario
BILONT
Billings Logan Intl
Sat 12/5
2:33 pm-9:11 pm
1 stop7h 38m
Ontario
Wed 12/9
11:20 am-9:29 pm
2 stops9h 09m
$494
BillingsOntario
BIL Billings Logan Intl - ONT Ontario
BILONT
Billings Logan Intl
Mon 1/4
11:55 am-10:38 am
1 stop23h 43m
Ontario
Mon 1/11
4:16 pm-11:29 am
1 stop18h 13m
$515
Showing 1-10 of 11 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 October.
| 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 October 9, 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.
Boarding
8.1
Overall
7.8
Comfort
7.8
Crew
8.5
Entertainment
7.8
Food
7.2
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
TUS - LAX
Boarding
8.1
Overall
7.8
Comfort
7.8
Crew
8.5
Entertainment
7.8
Food
7.2
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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Complete your trip
Complete your trip to Ontario by adding a car rental and/or hotel reservation to your travel itinerary.
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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 October 9, 2026.
Billings and Ontario flights
Browse other Billings and Ontario flight options. Last updated on October 9, 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 October 9, 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 7,457,451 searches. Data last updated October 9, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$180 | Average$455 | FlexibilityNo cancel fee | On-timeN/A |