$138+ Cheap flights from Ontario to Buffalo (ONT - BUF)
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 10/6. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BUF
Oct 15 — Oct 221
Round-trip
1 adult, Economy
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Find cheap flights from Ontario to Buffalo with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Ontario to Buffalo
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Best
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One-way
Cheapest flights from Ontario to BuffaloExplore the most affordable flight options available from Ontario to Buffalo. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2026.
Explore the most affordable flight options available from Ontario to Buffalo. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2026.
This American Airlines deal was found by Cheapflights users on 9/15. 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.
Sat 10/2410:10 pm -
1 stop9h 38m
Wed 11/47:14 am -
1 stop9h 17m
Deal found 9/15![American Airlines logo]()
$275
This Southwest deal was found by Cheapflights users on 9/15. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/2611:55 pm -
1 stop7h 30m
Wed 10/286:20 pm -
1 stop6h 45m
Deal found 9/15![Southwest logo]()
$294
This American Airlines deal was found by Cheapflights users on 9/15. 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.
Mon 10/2611:10 pm -
1 stop9h 55m
Wed 10/286:08 am -
2 stops10h 22m
Deal found 9/15![American Airlines logo]()
$299
This American Airlines deal was found by Cheapflights users on 9/14. 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.
Sat 10/1012:43 pm -
1 stop7h 11m
Sat 10/243:56 pm -
1 stop10h 03m
Deal found 9/14![American Airlines logo]()
$310
This American Airlines deal was found by Cheapflights users on 9/15. 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.
Wed 10/287:00 am -
2 stops12h 24m
Wed 11/45:13 am -
2 stops11h 18m
Deal found 9/15![American Airlines logo]()
$326
This Delta deal was found by Cheapflights users on 9/14. 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 10/712:16 pm -
1 stop8h 43m
Tue 10/276:00 am -
1 stop8h 06m
Deal found 9/14![Delta logo]()
$346
This Delta deal was found by Cheapflights users on 9/14. 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.
Sat 10/107:07 am -
2 stops12h 31m
Sat 10/246:15 am -
2 stops9h 21m
Deal found 9/14![Delta logo]()
$357
This Delta deal was found by Cheapflights users on 9/14. 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 10/1312:16 pm -
1 stop8h 43m
Tue 10/276:00 am -
1 stop8h 06m
Deal found 9/14![Delta logo]()
$388
Best flights from Ontario to BuffaloDiscover carefully curated flight deals from Ontario to Buffalo that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 15, 2026.
Discover carefully curated flight deals from Ontario to Buffalo that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 15, 2026.
This Southwest deal was found by Cheapflights users on 9/15. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/2611:55 pm -
1 stop7h 30m
Wed 10/286:20 pm -
1 stop6h 45m
Deal found 9/15![Southwest logo]()
$294
This United Airlines deal was found by Cheapflights users on 9/15. 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 11/105:00 am -
2 stops14h 59m
Wed 11/1110:51 am -
2 stops13h 00m
Deal found 9/15![United Airlines logo]()
$395
This Delta deal was found by Cheapflights users on 9/11. 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 10/1611:19 pm -
2 stops12h 52m
Wed 10/216:00 am -
1 stop8h 06m
Deal found 9/11![Delta logo]()
$482
This Delta deal was found by Cheapflights users on 9/11. 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 10/1611:19 pm -
2 stops12h 52m
Tue 10/206:00 am -
1 stop8h 06m
Deal found 9/11![Delta logo]()
$482
This Delta deal was found by Cheapflights users on 9/15. 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 10/2212:16 pm -
1 stop8h 43m
Mon 10/266:00 am -
1 stop8h 06m
Deal found 9/15![Delta logo]()
$509
This United Airlines deal was found by Cheapflights users on 9/15. 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 10/147:00 am -
1 stop6h 43m
Sat 10/175:45 pm -
1 stop8h 04m
Deal found 9/15![United Airlines logo]()
$683
This United Airlines deal was found by Cheapflights users on 9/13. 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 10/161:24 pm -
1 stop6h 19m
Thu 10/228:45 am -
1 stop7h 01m
Deal found 9/13![United Airlines logo]()
$736
This United Airlines deal was found by Cheapflights users on 9/13. 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 10/231:24 pm -
1 stop6h 19m
Sun 10/258:50 am -
1 stop6h 40m
Deal found 9/13![United Airlines logo]()
$736
Last-minute flights from Ontario to BuffaloDiscover last-minute flight deals from Ontario to Buffalo. Data last updated September 15, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Buffalo. Data last updated September 15, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 9/14. 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 10/712:16 pm -
1 stop8h 43m
Tue 10/276:00 am -
1 stop8h 06m
Deal found 9/14![Delta logo]()
$346
This American Airlines deal was found by Cheapflights users on 9/14. 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.
Sat 10/1012:43 pm -
1 stop7h 11m
Sat 10/243:56 pm -
1 stop10h 03m
Deal found 9/14![American Airlines logo]()
$310
This Delta deal was found by Cheapflights users on 9/14. 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.
Sat 10/107:07 am -
2 stops12h 31m
Sat 10/246:15 am -
2 stops9h 21m
Deal found 9/14![Delta logo]()
$357
This Delta deal was found by Cheapflights users on 9/14. 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 10/1312:16 pm -
1 stop8h 43m
Tue 10/276:00 am -
1 stop8h 06m
Deal found 9/14![Delta logo]()
$388
This American Airlines deal was found by Cheapflights users on 9/15. 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.
Sat 10/2410:10 pm -
1 stop9h 38m
Wed 11/47:14 am -
1 stop9h 17m
Deal found 9/15![American Airlines logo]()
$275
This Southwest deal was found by Cheapflights users on 9/15. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/2611:55 pm -
1 stop7h 30m
Wed 10/286:20 pm -
1 stop6h 45m
Deal found 9/15![Southwest logo]()
$294
This American Airlines deal was found by Cheapflights users on 9/15. 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.
Mon 10/2611:10 pm -
1 stop9h 55m
Wed 10/286:08 am -
2 stops10h 22m
Deal found 9/15![American Airlines logo]()
$299
This American Airlines deal was found by Cheapflights users on 9/15. 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.
Wed 10/287:00 am -
2 stops12h 24m
Wed 11/45:13 am -
2 stops11h 18m
Deal found 9/15![American Airlines logo]()
$326
One-way flights from Ontario to BuffaloSearch for one-way flight options from Ontario to Buffalo. Find affordable one-way fares based on user searches. Data last updated September 15, 2026.
Search for one-way flight options from Ontario to Buffalo. Find affordable one-way fares based on user searches. Data last updated September 15, 2026.
This American Airlines deal was found by Cheapflights users on 9/14. 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 10/612:43 pm -
1 stop7h 11m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/14![American Airlines logo]()
$138
This Delta deal was found by Cheapflights users on 9/15. 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 10/1911:08 pm -
1 stop9h 22m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![Delta logo]()
$157
This Delta deal was found by Cheapflights users on 9/14. 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 10/1611:19 pm -
1 stop8h 57m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/14![Delta logo]()
$176
This Southwest deal was found by Cheapflights users on 9/13. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/69:15 am -
1 stop12h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/13![Southwest logo]()
$180
This Southwest deal was found by Cheapflights users on 9/11. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/135:00 am -
1 stop8h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Southwest logo]()
$189
This United Airlines deal was found by Cheapflights users on 9/15. 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 43m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![United Airlines logo]()
$193
This Delta deal was found by Cheapflights users on 9/15. 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.
Sat 10/1712:16 pm -
1 stop8h 43m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![Delta logo]()
$199
This Frontier deal was found by Cheapflights users on 9/11. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/88:32 pm -
2 stops12h 02m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Frontier logo]()
$207
Find flight deals from Ontario to Buffalo
Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Buffalo (BUF). 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 15, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $275 (American Airlines) |
One-way from | $138 (American Airlines) |
Popular in | January |
Cheapest in | April |
Average price | $538 |
Cheapflights Fare Finder
Customize your flight search to find flights from Ontario to Buffalo 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 15, 2026.
Use the filters below to find and compare flights from Ontario to Buffalo that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
OntarioBuffalo
ONT Ontario - BUF Buffalo
ONTBUF
Ontario
Sat 2/13
7:55 pm-8:05 am
2 stops9h 10m
Buffalo
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$194
OntarioBuffalo
ONT Ontario - BUF Buffalo
ONTBUF
Ontario
Fri 12/25
5:00 am-8:47 pm
2 stops12h 47m
Buffalo
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$236
Quickest round-trip
OntarioBuffalo
ONT Ontario - BUF Buffalo
ONTBUF
Ontario
Tue 12/8
1:40 pm-10:57 pm
1 stop6h 17m
Buffalo
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$269
OntarioBuffalo
ONT Ontario - BUF Buffalo
ONTBUF
Ontario
Wed 11/18
7:00 am-5:02 pm
1 stop7h 02m
Buffalo
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$274
OntarioBuffalo
ONT Ontario - BUF Buffalo
ONTBUF
Ontario
Sun 2/7
7:10 pm-6:12 pm
2 stops20h 02m
Buffalo
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$279
OntarioBuffalo
ONT Ontario - BUF Buffalo
ONTBUF
Ontario
Mon 10/5
6:00 pm-10:38 am
2 stops13h 38m
Buffalo
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$289
OntarioBuffalo
ONT Ontario - BUF Buffalo
ONTBUF
Ontario
Mon 10/26
11:55 pm-10:25 am
1 stop7h 30m
Buffalo
Wed 10/28
6:20 pm-10:05 pm
1 stop6h 45m
$294
OntarioBuffalo
ONT Ontario - BUF Buffalo
ONTBUF
Ontario
Sun 2/7
1:00 pm-10:54 pm
1 stop6h 54m
Buffalo
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$299
OntarioBuffalo
ONT Ontario - BUF Buffalo
ONTBUF
Ontario
Thu 12/31
11:52 pm-9:43 am
1 stop6h 51m
Buffalo
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$308
OntarioBuffalo
ONT Ontario - BUF Buffalo
ONTBUF
Ontario
Fri 10/30
6:56 pm-10:45 am
2 stops12h 49m
Buffalo
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$314
Showing 1-10 of 20 resultsSorted by cheapest first
Compare providers for flights from Ontario to Buffalo
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Buffalo 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 Ontario-Buffalo flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Buffalo flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Buffalo flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Ontario-Buffalo flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Buffalo flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Ontario to Buffalo
Have a flexible travel schedule? Discover the best time to fly to Buffalo from Ontario with our price prediction graph.
ONT-BUF
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Ontario to Buffalo
Reviews of airlines servicing Buffalo
Get insights into the airlines that provide service to Buffalo. 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 Buffalo. Reviews last updated September 15, 2026.
Read reviews from past customers who have flown Southwest and United Airlines from Ontario to Buffalo. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Comfort
8.0
Overall
8.0
Entertainment
7.5
Boarding
8.1
Crew
8.6
Food
7.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Comfort
8.0
Overall
8.0
Entertainment
7.5
Boarding
8.1
Crew
8.6
Food
7.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Comfort
8.0
Overall
8.0
Entertainment
7.5
Boarding
8.1
Crew
8.6
Food
7.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Related info for your journey
Find useful and relevant information for your journey from Ontario to Buffalo. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Buffalo?
Book flights to Buffalo if you plan to visit one of these locationsCheektowaga
Lockport
Amherst
Williamsville
Orchard Park
Eden
Bowmansville
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Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
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Other flights to Buffalo
Explore flights to Buffalo departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on September 15, 2026.
Complete your trip
Complete your trip to Buffalo by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Ontario to Buffalo by cabin class
Find flights from Ontario to Buffalo, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Ontario and Buffalo flights
Browse other Ontario and Buffalo flight options. Last updated on September 15, 2026.
Other flights from Ontario
Browse through other flights departing from Ontario. Flights are based on user searches made on Cheapflights and were last updated on September 15, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 2 airlines flying from Ontario to Buffalo
Discover the top 2 airlines that operate flights from Ontario to Buffalo. 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 15, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$342 | Average$526 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$376 | Average$485 | FlexibilityNo cancel fee | On-time69% |