$186+ 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 12/24. Fares are subject to change and may not be available on all flights or dates of travel.
BIL — ONT
Dec 10 — Dec 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 November 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 November 10, 2026.
This Delta deal was found by Cheapflights users on 11/6. 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 12/166:21 pm -
1 stop6h 36m
Sun 12/205:05 pm -
1 stop4h 50m
Deal found 11/6![Delta logo]()
$421
This United Airlines deal was found by Cheapflights users on 11/7. 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.
Sun 11/224:00 pm -
1 stop5h 51m
Thu 11/265:00 am -
1 stop7h 29m
Deal found 11/7![United Airlines logo]()
$471
This Alaska Airlines deal was found by Cheapflights users on 11/8. 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 12/127:01 am -
1 stop10h 04m
Fri 1/16:00 am -
1 stop16h 30m
Deal found 11/8![Alaska Airlines logo]()
$487
This Gotogate deal was found by Cheapflights users on 11/5. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/306:00 am -
1 stop18h 59m
Mon 1/46:00 am -
1 stop16h 30m
Deal found 11/5![Alaska Airlines logo]()
$517
This Gotogate deal was found by Cheapflights users on 11/6. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/163:32 pm -
1 stop9h 22m
Sun 12/203:59 pm -
1 stop6h 31m
Deal found 11/6![Alaska Airlines logo]()
$520
This Delta deal was found by Cheapflights users on 11/8. 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 11/176:29 pm -
1 stop6h 20m
Thu 11/195:04 pm -
1 stop4h 16m
Deal found 11/8![Delta logo]()
$521
This United Airlines deal was found by Cheapflights users on 11/8. 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.
Tue 11/1710:30 am -
2 stops10h 45m
Thu 11/195:00 am -
1 stop7h 29m
Deal found 11/8![United Airlines logo]()
$526
This Gotogate deal was found by Cheapflights users on 11/5. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/185:12 pm -
1 stop19h 01m
Tue 12/16:00 am -
1 stop15h 58m
Deal found 11/5![Alaska Airlines logo]()
$545
This Alaska Airlines deal was found by Cheapflights users on 11/9. 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.
Sun 11/227:20 am -
1 stop8h 45m
Mon 11/308:59 pm -
1 stop13h 25m
Deal found 11/9![Alaska Airlines logo]()
$546
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 November 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 November 10, 2026.
This Delta deal was found by Cheapflights users on 11/6. 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 12/166:21 pm -
1 stop6h 36m
Sun 12/205:05 pm -
1 stop4h 50m
Deal found 11/6![Delta logo]()
$421
This Travelocity deal was found by Cheapflights users on 11/5. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/712:09 pm -
1 stop11h 34m
Fri 2/124:00 pm -
1 stop6h 59m
Deal found 11/5![Alaska Airlines logo]()
$471
This American Airlines deal was found by Cheapflights users on 11/5. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/76:30 am -
1 stop7h 09m
Fri 2/124:25 pm -
1 stop5h 59m
Deal found 11/5![American Airlines logo]()
$471
This United Airlines deal was found by Cheapflights users on 11/7. 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.
Mon 12/72:33 pm -
1 stop7h 38m
Wed 12/96:00 am -
2 stops8h 23m
Deal found 11/7![United Airlines logo]()
$476
This United Airlines deal was found by Cheapflights users on 11/7. 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.
Sun 11/222:42 pm -
2 stops9h 06m
Thu 11/265:00 am -
1 stop7h 29m
Deal found 11/7![United Airlines logo]()
$476
Last-minute flights from Billings to OntarioDiscover last-minute flight deals from Billings to Ontario. Data last updated November 10, 2026 and is based on user searches.
Discover last-minute flight deals from Billings to Ontario. Data last updated November 10, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 11/8. 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 11/176:29 pm -
1 stop6h 20m
Thu 11/195:04 pm -
1 stop4h 16m
Deal found 11/8![Delta logo]()
$521
This United Airlines deal was found by Cheapflights users on 11/8. 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.
Tue 11/1710:30 am -
2 stops10h 45m
Thu 11/195:00 am -
1 stop7h 29m
Deal found 11/8![United Airlines logo]()
$526
This Gotogate deal was found by Cheapflights users on 11/5. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/185:12 pm -
1 stop19h 01m
Tue 12/16:00 am -
1 stop15h 58m
Deal found 11/5![Alaska Airlines logo]()
$545
This United Airlines deal was found by Cheapflights users on 11/7. 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.
Sun 11/224:00 pm -
1 stop5h 51m
Thu 11/265:00 am -
1 stop7h 29m
Deal found 11/7![United Airlines logo]()
$471
This Alaska Airlines deal was found by Cheapflights users on 11/9. 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.
Sun 11/227:20 am -
1 stop8h 45m
Mon 11/308:59 pm -
1 stop13h 25m
Deal found 11/9![Alaska Airlines logo]()
$546
This Alaska Airlines deal was found by Cheapflights users on 11/8. 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 12/127:01 am -
1 stop10h 04m
Fri 1/16:00 am -
1 stop16h 30m
Deal found 11/8![Alaska Airlines logo]()
$487
This Delta deal was found by Cheapflights users on 11/6. 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 12/166:21 pm -
1 stop6h 36m
Sun 12/205:05 pm -
1 stop4h 50m
Deal found 11/6![Delta logo]()
$421
This Gotogate deal was found by Cheapflights users on 11/6. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/163:32 pm -
1 stop9h 22m
Sun 12/203:59 pm -
1 stop6h 31m
Deal found 11/6![Alaska Airlines logo]()
$520
This Gotogate deal was found by Cheapflights users on 11/5. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/306:00 am -
1 stop18h 59m
Mon 1/46:00 am -
1 stop16h 30m
Deal found 11/5![Alaska Airlines logo]()
$517
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 November 10, 2026.
Search for one-way flight options from Billings to Ontario. Find affordable one-way fares based on user searches. Data last updated November 10, 2026.
This United Airlines deal was found by Cheapflights users on 11/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/244:15 pm -
1 stop5h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/8![United Airlines logo]()
$186
This Kiwi.com deal was found by Cheapflights users on 11/6. 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.
Fri 11/205:57 pm -
1 stop14h 23m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/6![Multiple Airlines logo]()
$225
This Priceline deal was found by Cheapflights users on 11/9. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/93:39 pm -
1 stop5h 24m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/9![Alaska Airlines logo]()
$234
This Priceline deal was found by Cheapflights users on 11/6. 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.
Mon 11/1611:55 am -
1 stop7h 22m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/6![Alaska Airlines logo]()
$261
This Kiwi.com deal was found by Cheapflights users on 11/8. 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.
Thu 12/244:54 pm -
3 stops29h 59m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/8![Multiple Airlines logo]()
$285
This Priceline deal was found by Cheapflights users on 11/7. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/155:12 pm -
1 stop6h 54m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/7![Alaska Airlines logo]()
$311
This United Airlines deal was found by Cheapflights users on 11/6. 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.
Thu 11/194:00 pm -
1 stop5h 51m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/6![United Airlines logo]()
$354
This United Airlines deal was found by Cheapflights users on 11/9. 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 11/244:00 pm -
1 stop5h 51m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/9![United Airlines logo]()
$356
This American Airlines deal was found by Cheapflights users on 11/8. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/247:00 am -
2 stops10h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/8![American Airlines logo]()
$375
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 November 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $371 (Expedia) |
One-way from | $186 (United Airlines) |
Popular in | November |
Cheapest in | March |
Average price | $530 |
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 November 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 Billings Logan Intl - ONT Ontario
BILONT
Billings Logan Intl
Thu 12/24
4:15 pm-9:00 pm
1 stop5h 45m
Ontario
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$186
Quickest round-trip
BillingsOntario
BIL Billings Logan Intl - ONT Ontario
BILONT
Billings Logan Intl
Sat 1/9
3:39 pm-8:03 pm
1 stop5h 24m
Ontario
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$234
BillingsOntario
BIL Billings Logan Intl - ONT Ontario
BILONT
Billings Logan Intl
Sun 11/15
5:12 pm-11:06 pm
1 stop6h 54m
Ontario
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$311
BillingsOntario
BIL Billings Logan Intl - ONT Ontario
BILONT
Billings Logan Intl
Thu 11/19
4:00 pm-8:51 pm
1 stop5h 51m
Ontario
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$354
BillingsOntario
BIL Billings Logan Intl - ONT Ontario
BILONT
Billings Logan Intl
Tue 11/24
4:00 pm-8:51 pm
1 stop5h 51m
Ontario
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$356
BillingsOntario
BIL Billings Logan Intl - ONT Ontario
BILONT
Billings Logan Intl
Thu 1/14
7:30 am-5:10 pm
2 stops10h 40m
Ontario
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$401
BillingsOntario
BIL Billings Logan Intl - ONT Ontario
BILONT
Billings Logan Intl
Wed 12/16
6:21 pm-11:57 pm
1 stop6h 36m
Ontario
Sun 12/20
5:05 pm-10:55 pm
1 stop4h 50m
$421
BillingsOntario
BIL Billings Logan Intl - ONT Ontario
BILONT
Billings Logan Intl
Fri 11/20
5:57 pm-10:45 am
3 stops41h 48m
Ontario
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$429
BillingsOntario
BIL Billings Logan Intl - ONT Ontario
BILONT
Billings Logan Intl
Thu 11/19
12:58 pm-11:00 pm
2 stops11h 02m
Ontario
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$470
BillingsOntario
BIL Billings Logan Intl - ONT Ontario
BILONT
Billings Logan Intl
Sun 2/7
12:09 pm-10:43 pm
1 stop11h 34m
Ontario
Fri 2/12
4:00 pm-11:59 pm
1 stop6h 59m
$471
Showing 1-10 of 14 resultsSorted by cheapest first
Compare providers for flights from Billings to Ontario
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Billings to Ontario in November.
| 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 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 November 10, 2026.
See what other customers who have flown with Delta from Billings to Ontario have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.8
Comfort
7.8
Crew
8.5
Food
7.2
Boarding
8.1
Overall
7.8
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
TUS - LAX
Entertainment
7.8
Comfort
7.8
Crew
8.5
Food
7.2
Boarding
8.1
Overall
7.8
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
TUS - LAX
Related info for your journey
Find useful and relevant information for your journey from Billings to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for Billings to Ontario
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Complete your trip
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 November 10, 2026.
Billings and Ontario flights
Browse other Billings and Ontario flight options. Last updated on November 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 November 10, 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 November 10, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$180 | Average$455 | FlexibilityNo cancel fee | On-timeN/A |