$161+ 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 9/24. Fares are subject to change and may not be available on all flights or dates of travel.
BIL — ONT
Oct 7 — Oct 141
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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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 September 7, 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 September 7, 2026.
This SmartFares 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/197:41 am -
1 stop6h 35m
Tue 10/277:25 am -
1 stop6h 39m
Deal found 9/6![Alaska Airlines logo]()
$311
This Delta deal was found by Cheapflights users on 9/2. 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 10/145:20 am -
1 stop4h 35m
Tue 10/209:45 am -
1 stop7h 04m
Deal found 9/2![Delta logo]()
$321
This Booking.com 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/77:32 pm -
1 stop15h 45m
Wed 10/142:13 pm -
1 stop8h 37m
Deal found 9/6![Alaska Airlines logo]()
$332
This Booking.com 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/77:32 pm -
1 stop15h 45m
Fri 10/1611:13 am -
1 stop23h 12m
Deal found 9/6![Alaska Airlines logo]()
$358
This Booking.com deal was found by Cheapflights users on 9/4. 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.
Sat 11/75:12 pm -
1 stop19h 06m
Wed 11/117:15 am -
1 stop6h 37m
Deal found 9/4![Alaska Airlines 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.
Sat 12/56:00 am -
1 stop6h 09m
Wed 12/96:00 am -
1 stop8h 08m
Deal found 9/6![Alaska Airlines logo]()
$382
This Priceline deal was found by Cheapflights users on 9/4. 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.
Fri 11/611:55 am -
1 stop7h 22m
Wed 11/117:15 am -
1 stop6h 37m
Deal found 9/4![Alaska Airlines logo]()
$393
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 September 7, 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 September 7, 2026.
This Delta deal was found by Cheapflights users on 9/2. 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 10/145:20 am -
1 stop4h 35m
Tue 10/209:45 am -
1 stop7h 04m
Deal found 9/2![Delta logo]()
$321
This United Airlines deal was found by Cheapflights users on 9/2. 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 2/52:42 pm -
1 stop6h 38m
Wed 2/105:00 am -
1 stop7h 23m
Deal found 9/2![United Airlines logo]()
$371
This Booking.com deal was found by Cheapflights users on 9/4. 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.
Sat 11/75:12 pm -
1 stop19h 06m
Wed 11/117:15 am -
1 stop6h 37m
Deal found 9/4![Alaska Airlines logo]()
$380
This Alaska Airlines 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/56:00 am -
1 stop6h 09m
Wed 12/96:00 am -
1 stop8h 08m
Deal found 9/5![Alaska Airlines logo]()
$382
This Priceline deal was found by Cheapflights users on 9/4. 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.
Fri 11/611:55 am -
1 stop7h 22m
Wed 11/117:15 am -
1 stop6h 37m
Deal found 9/4![Alaska Airlines logo]()
$393
This Booking.com deal was found by Cheapflights users on 9/2. 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.
Tue 2/97:00 am -
1 stop9h 20m
Fri 2/2610:03 am -
2 stops13h 05m
Deal found 9/2![Alaska Airlines logo]()
$417
Last-minute flights from Billings to OntarioDiscover last-minute flight deals from Billings to Ontario. Data last updated September 7, 2026 and is based on user searches.
Discover last-minute flight deals from Billings to Ontario. Data last updated September 7, 2026 and is based on user searches.
This Booking.com 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/77:32 pm -
1 stop15h 45m
Wed 10/142:13 pm -
1 stop8h 37m
Deal found 9/6![Alaska Airlines logo]()
$332
This Booking.com 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/77:32 pm -
1 stop15h 45m
Fri 10/1611:13 am -
1 stop23h 12m
Deal found 9/6![Alaska Airlines logo]()
$358
This Booking.com 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/77:41 am -
1 stop6h 35m
Sun 10/186:02 am -
1 stop28h 23m
Deal found 9/6![Alaska Airlines logo]()
$473
This Delta deal was found by Cheapflights users on 9/2. 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 10/145:20 am -
1 stop4h 35m
Tue 10/209:45 am -
1 stop7h 04m
Deal found 9/2![Delta logo]()
$321
This Booking.com deal was found by Cheapflights users on 9/2. 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 10/167:32 pm -
1 stop15h 45m
Fri 10/235:30 pm -
1 stop20h 34m
Deal found 9/2![Alaska Airlines logo]()
$421
This SmartFares 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/197:41 am -
1 stop6h 35m
Tue 10/277:25 am -
1 stop6h 39m
Deal found 9/6![Alaska Airlines logo]()
$311
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 September 7, 2026.
Search for one-way flight options from Billings to Ontario. Find affordable one-way fares based on user searches. Data last updated September 7, 2026.
This Delta deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/245:20 am -
1 stop4h 42m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/3![Delta logo]()
$161
This Alaska Airlines deal was found by Cheapflights users on 9/2. 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 10/67:32 pm -
1 stop15h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/2![Alaska Airlines logo]()
$166
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/85:20 am -
1 stop4h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![Delta logo]()
$171
This Booking.com deal was found by Cheapflights users on 9/3. 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.
Sat 9/193:42 pm -
1 stop19h 09m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/3![Alaska Airlines logo]()
$241
This American Airlines deal was found by Cheapflights users on 9/4. 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.
Tue 12/227:25 am -
1 stop6h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![American Airlines logo]()
$244
This United Airlines deal was found by Cheapflights users on 9/3. 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 9/197:00 am -
2 stops12h 11m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/3![United Airlines logo]()
$291
This United Airlines deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/245:00 am -
2 stops8h 18m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/2![United Airlines logo]()
$336
This Alaska Airlines deal was found by Cheapflights users on 9/4. 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 12/226:00 am -
2 stops12h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![Alaska Airlines logo]()
$422
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 September 7, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $311 (SmartFares) |
One-way from | $161 (Delta) |
Popular in | August |
Cheapest in | June |
Average price | $340 |
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 September 7, 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
Tue 10/6
7:32 pm-10:17 am
1 stop15h 45m
Ontario
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$166
Quickest round-trip
BillingsOntario
BIL Billings Logan Intl - ONT Ontario
BILONT
Billings Logan Intl
Thu 9/24
5:20 am-9:02 am
1 stop4h 42m
Ontario
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$196
BillingsOntario
BIL Billings Logan Intl - ONT Ontario
BILONT
Billings Logan Intl
Sat 9/19
3:42 pm-9:51 am
1 stop19h 09m
Ontario
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$241
BillingsOntario
BIL Billings Logan Intl - ONT Ontario
BILONT
Billings Logan Intl
Tue 12/22
7:25 am-12:40 pm
1 stop6h 15m
Ontario
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$244
BillingsOntario
BIL Billings Logan Intl - ONT Ontario
BILONT
Billings Logan Intl
Sat 9/19
7:00 am-6:11 pm
2 stops12h 11m
Ontario
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$291
BillingsOntario
BIL Billings Logan Intl - ONT Ontario
BILONT
Billings Logan Intl
Wed 10/14
5:20 am-8:55 am
1 stop4h 35m
Ontario
Tue 10/20
9:45 am-5:49 pm
1 stop7h 04m
$321
BillingsOntario
BIL Billings Logan Intl - ONT Ontario
BILONT
Billings Logan Intl
Thu 9/24
5:00 am-12:18 pm
2 stops8h 18m
Ontario
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$336
BillingsOntario
BIL Billings Logan Intl - ONT Ontario
BILONT
Billings Logan Intl
Fri 2/5
2:42 pm-8:20 pm
1 stop6h 38m
Ontario
Wed 2/10
5:00 am-1:23 pm
1 stop7h 23m
$371
BillingsOntario
BIL Billings Logan Intl - ONT Ontario
BILONT
Billings Logan Intl
Sat 11/7
5:12 pm-11:18 am
1 stop19h 06m
Ontario
Wed 11/11
7:15 am-2:52 pm
1 stop6h 37m
$380
BillingsOntario
BIL Billings Logan Intl - ONT Ontario
BILONT
Billings Logan Intl
Sat 12/5
6:00 am-11:09 am
1 stop6h 09m
Ontario
Wed 12/9
6:00 am-3:08 pm
1 stop8h 08m
$382
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 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 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 September 7, 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.
Overall
7.8
Food
7.2
Comfort
7.8
Crew
8.5
Entertainment
7.8
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
TUS - LAX
Overall
7.8
Food
7.2
Comfort
7.8
Crew
8.5
Entertainment
7.8
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
TUS - LAX
Related info for your journey
Find useful and relevant information for your journey from Billings to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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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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Find flights from Billings to Ontario, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Other flights to Ontario
Explore flights to Ontario departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on September 7, 2026.
Billings and Ontario flights
Browse other Billings and Ontario flight options. Last updated on September 7, 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 September 7, 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 September 7, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$180 | Average$410 | FlexibilityNo cancel fee | On-timeN/A |