$161+ Cheap flights from Billings to Ontario (BIL - ONT)
This is the cheapest one-way 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
Sep 9 — Sep 161
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 August 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 August 10, 2026.
This Orbitz deal was found by Cheapflights users on 8/9. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/166:14 am -
1 stop6h 02m
Sun 9/207:59 pm -
1 stop14h 41m
Deal found 8/9![Alaska Airlines logo]()
$371
This Booking.com deal was found by Cheapflights users on 8/7. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/23:44 pm -
1 stop9h 15m
Tue 12/86:00 am -
1 stop8h 08m
Deal found 8/7![Alaska Airlines logo]()
$376
This Delta deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/3111:51 am -
1 stop5h 33m
Tue 9/85:15 pm -
1 stop4h 19m
Deal found 8/7![Delta logo]()
$388
This United Airlines deal was found by Cheapflights users on 8/9. 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.
Mon 8/317:00 am -
1 stop6h 50m
Tue 9/81:18 pm -
1 stop6h 42m
Deal found 8/9![United Airlines logo]()
$403
This United Airlines deal was found by Cheapflights users on 8/9. 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.
Wed 9/165:00 am -
2 stops8h 12m
Sun 9/205:00 am -
1 stop7h 21m
Deal found 8/9![United Airlines logo]()
$408
This Booking.com deal was found by Cheapflights users on 8/9. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/177:41 am -
2 stops13h 34m
Wed 10/217:25 am -
1 stop6h 39m
Deal found 8/9![Alaska Airlines logo]()
$412
This Alaska Airlines deal was found by Cheapflights users on 8/9. 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.
Sat 11/77:18 am -
1 stop8h 55m
Sat 11/144:09 pm -
1 stop5h 34m
Deal found 8/9![Alaska Airlines logo]()
$417
This United Airlines deal was found by Cheapflights users on 8/7. 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 9/67:00 am -
1 stop6h 50m
Sat 9/125:00 am -
1 stop7h 21m
Deal found 8/7![United Airlines logo]()
$419
This Alaska Airlines deal was found by Cheapflights users on 8/9. 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 11/87:18 am -
1 stop8h 55m
Fri 11/134:09 pm -
1 stop5h 34m
Deal found 8/9![Alaska Airlines logo]()
$421
This United Airlines deal was found by Cheapflights users on 8/9. 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 9/87:00 am -
1 stop6h 50m
Sat 9/125:00 am -
1 stop7h 21m
Deal found 8/9![United Airlines logo]()
$439
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 August 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 August 10, 2026.
This deal was found by Cheapflights users on 8/7. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/712:58 pm -
1 stop4h 14m
Mon 1/115:05 pm -
1 stop4h 27m
Deal found 8/7![Delta logo]()
$321
This United Airlines deal was found by Cheapflights users on 8/9. 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 9/87:00 am -
1 stop6h 50m
Sat 9/125:00 am -
1 stop7h 21m
Deal found 8/9![United Airlines logo]()
$439
This Alaska Airlines deal was found by Cheapflights users on 8/9. 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.
Sat 10/1712:05 pm -
1 stop6h 55m
Wed 10/2111:13 am -
1 stop23h 12m
Deal found 8/9![Alaska Airlines logo]()
$445
This deal was found by Cheapflights users on 8/7. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/76:25 pm -
1 stop6h 23m
Sun 1/105:05 pm -
1 stop4h 27m
Deal found 8/7![Delta logo]()
$371
This Delta deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/3111:51 am -
1 stop5h 33m
Tue 9/85:15 pm -
1 stop4h 19m
Deal found 8/7![Delta logo]()
$388
This United Airlines deal was found by Cheapflights users on 8/8. 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 9/37:00 am -
1 stop6h 50m
Tue 9/81:18 pm -
1 stop6h 42m
Deal found 8/8![United Airlines logo]()
$441
This United Airlines deal was found by Cheapflights users on 8/8. 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 9/17:00 am -
1 stop6h 50m
Sat 9/55:00 am -
1 stop7h 21m
Deal found 8/8![United Airlines logo]()
$451
Last-minute flights from Billings to OntarioDiscover last-minute flight deals from Billings to Ontario. Data last updated August 10, 2026 and is based on user searches.
Discover last-minute flight deals from Billings to Ontario. Data last updated August 10, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/3111:51 am -
1 stop5h 33m
Tue 9/85:15 pm -
1 stop4h 19m
Deal found 8/7![Delta logo]()
$388
This United Airlines deal was found by Cheapflights users on 8/9. 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.
Mon 8/317:00 am -
1 stop6h 50m
Tue 9/81:18 pm -
1 stop6h 42m
Deal found 8/9![United Airlines logo]()
$403
This United Airlines deal was found by Cheapflights users on 8/6. 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.
Tue 9/17:00 am -
1 stop6h 50m
Sat 9/55:00 am -
1 stop7h 21m
Deal found 8/6![United Airlines logo]()
$449
This United Airlines deal was found by Cheapflights users on 8/7. 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.
Thu 9/37:00 am -
1 stop6h 50m
Tue 9/85:00 am -
1 stop7h 21m
Deal found 8/7![United Airlines logo]()
$441
This United Airlines deal was found by Cheapflights users on 8/7. 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 9/67:00 am -
1 stop6h 50m
Sat 9/125:00 am -
1 stop7h 21m
Deal found 8/7![United Airlines logo]()
$419
This United Airlines deal was found by Cheapflights users on 8/9. 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 9/87:00 am -
1 stop6h 50m
Sat 9/125:00 am -
1 stop7h 21m
Deal found 8/9![United Airlines logo]()
$439
This Orbitz deal was found by Cheapflights users on 8/9. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/166:14 am -
1 stop6h 02m
Sun 9/207:59 pm -
1 stop14h 41m
Deal found 8/9![Alaska Airlines logo]()
$371
This United Airlines deal was found by Cheapflights users on 8/9. 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.
Wed 9/165:00 am -
2 stops8h 12m
Sun 9/205:00 am -
1 stop7h 21m
Deal found 8/9![United Airlines logo]()
$408
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 August 10, 2026.
Search for one-way flight options from Billings to Ontario. Find affordable one-way fares based on user searches. Data last updated August 10, 2026.
This Delta deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/245:20 am -
1 stop4h 42m
Deal found 8/7![Delta logo]()
$161
This Delta deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/245:20 am -
1 stop4h 32m
Deal found 8/7![Delta logo]()
$186
This United Airlines deal was found by Cheapflights users on 8/9. 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.
Sat 10/312:42 pm -
1 stop7h 09m
Deal found 8/9![United Airlines logo]()
$209
This Alaska Airlines deal was found by Cheapflights users on 8/9. 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.
Thu 9/243:42 pm -
1 stop5h 42m
Deal found 8/9![Alaska Airlines logo]()
$216
This United Airlines deal was found by Cheapflights users on 8/5. 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 8/272:29 pm -
2 stops9h 30m
Deal found 8/5![United Airlines logo]()
$246
This United Airlines deal was found by Cheapflights users on 8/6. 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.
Tue 8/182:29 pm -
1 stop7h 24m
Deal found 8/6![United Airlines logo]()
$276
This United Airlines deal was found by Cheapflights users on 8/8. 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 9/245:00 am -
2 stops8h 18m
Deal found 8/8![United Airlines logo]()
$284
This Delta deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/165:20 am -
1 stop4h 32m
Deal found 8/9![Delta logo]()
$286
This Priceline deal was found by Cheapflights users on 8/9. 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.
Mon 9/286:14 am -
2 stops10h 56m
Deal found 8/9![Alaska Airlines logo]()
$287
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 August 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $321 |
One-way from | $161 (Delta) |
Popular in | August |
Cheapest in | June |
Average price | $693 |
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 2,558,603 searches. Data last updated August 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
Quickest round-trip
BillingsOntario
BIL Billings Logan Intl - ONT Ontario
BILONT
Billings Logan Intl
Thu 1/7
12:58 pm-4:12 pm
1 stop4h 14m
Ontario
Mon 1/11
5:05 pm-10:32 pm
1 stop4h 27m
$321
BillingsOntario
BIL Billings Logan Intl - ONT Ontario
BILONT
Billings Logan Intl
Thu 1/7
6:25 pm-11:48 pm
1 stop6h 23m
Ontario
Sun 1/10
5:05 pm-10:32 pm
1 stop4h 27m
$371
BillingsOntario
BIL Billings Logan Intl - ONT Ontario
BILONT
Billings Logan Intl
Mon 8/31
11:51 am-4:24 pm
1 stop5h 33m
Ontario
Tue 9/8
5:15 pm-10:34 pm
1 stop4h 19m
$388
BillingsOntario
BIL Billings Logan Intl - ONT Ontario
BILONT
Billings Logan Intl
Tue 9/8
7:00 am-12:50 pm
1 stop6h 50m
Ontario
Sat 9/12
5:00 am-1:21 pm
1 stop7h 21m
$439
BillingsOntario
BIL Billings Logan Intl - ONT Ontario
BILONT
Billings Logan Intl
Thu 9/3
7:00 am-12:50 pm
1 stop6h 50m
Ontario
Tue 9/8
1:18 pm-9:00 pm
1 stop6h 42m
$441
BillingsOntario
BIL Billings Logan Intl - ONT Ontario
BILONT
Billings Logan Intl
Sat 10/17
12:05 pm-6:00 pm
1 stop6h 55m
Ontario
Wed 10/21
11:13 am-11:25 am
1 stop23h 12m
$445
BillingsOntario
BIL Billings Logan Intl - ONT Ontario
BILONT
Billings Logan Intl
Tue 9/1
7:00 am-12:50 pm
1 stop6h 50m
Ontario
Sat 9/5
5:00 am-1:21 pm
1 stop7h 21m
$451
Cheapest one-way
BillingsOntario
BIL Billings Logan Intl - ONT Ontario
BILONT
Billings Logan Intl
Thu 9/24
5:20 am-9:02 am
1 stop4h 42m
$161
Quickest one-way
BillingsOntario
BIL Billings Logan Intl - ONT Ontario
BILONT
Billings Logan Intl
Mon 8/24
5:20 am-8:52 am
1 stop4h 32m
$186
BillingsOntario
BIL Billings Logan Intl - ONT Ontario
BILONT
Billings Logan Intl
Sat 10/31
2:42 pm-8:51 pm
1 stop7h 09m
$209
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 August.
| 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 August 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.
Crew
8.5
Overall
7.8
Entertainment
7.8
Comfort
7.8
Food
7.2
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
TUS - LAX
Crew
8.5
Overall
7.8
Entertainment
7.8
Comfort
7.8
Food
7.2
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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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 August 10, 2026.
Billings and Ontario flights
Browse other Billings and Ontario flight options. Last updated on August 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 August 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 2,558,603 searches. Data last updated August 10, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$180 | Average$409 | FlexibilityNo cancel fee | On-timeN/A |