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$68+ Cheap flights from Ontario to Buffalo (ONT - BUF)

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 10/4. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BUF
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap 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 11, 2025.

Round-trip from

$260
(Booking.com)

One-way from

$68
(Kiwi.com)

Popular in

November

Cheapest in

September

Average price

$296
From Ontario to Buffalo
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One-way flight from Ontario to Buffalo
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Highest demand for flights based on searches. 14% potential increase in price ($80 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($16 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Ontario to Buffalo

Cheapest flights from Ontario to Buffalo
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 11, 2025.

This Booking.com deal was found by Cheapflights users on 9/10. 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 9/278:59 pmONT - BUF
1 stop16h 03mFrontier
Mon 9/294:58 pmBUF - ONT
1 stop29h 56mFrontier
Deal found 9/10$260
This Booking.com deal was found by Cheapflights users on 9/10. 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.
Thu 9/188:59 pmONT - BUF
1 stop16h 03mFrontier
Mon 9/224:58 pmBUF - ONT
1 stop29h 56mFrontier
Deal found 9/10$265
This Priceline 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/246:53 amONT - BUF
1 stop6h 36mFrontier
Mon 10/275:24 pmBUF - ONT
1 stop9h 26mFrontier
Deal found 9/11$290
This Delta deal was found by Cheapflights users on 9/10. 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 9/3011:55 amONT - BUF
1 stop8h 42mDelta
Thu 10/24:43 pmBUF - ONT
1 stop8h 40mDelta
Deal found 9/10$297
This United Airlines deal was found by Cheapflights users on 9/10. 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 10/276:38 pmONT - BUF
2 stops12h 25mUnited Airlines
Wed 11/198:30 amBUF - ONT
1 stop7h 01mUnited Airlines
Deal found 9/10$302
This Booking.com deal was found by Cheapflights users on 9/9. 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.
Sun 9/148:59 pmONT - BUF
1 stop16h 04mFrontier
Sun 9/214:57 pmBUF - ONT
1 stop17h 56mFrontier
Deal found 9/9$307
This Delta deal was found by Cheapflights users on 9/10. 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 10/2911:36 amONT - BUF
1 stop9h 03mDelta
Sun 11/25:00 amBUF - ONT
1 stop7h 26mDelta
Deal found 9/10$311
This United Airlines deal was found by Cheapflights users on 9/9. 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 10/86:36 pmONT - BUF
2 stops12h 17mUnited Airlines
Wed 10/155:55 pmBUF - ONT
1 stop7h 35mUnited Airlines
Deal found 9/9$312
This Southwest deal was found by Cheapflights users on 9/9. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/812:00 pmONT - BUF
1 stop7h 15mSouthwest
Wed 10/156:00 amBUF - ONT
1 stop10h 30mSouthwest
Deal found 9/9$326
This American Airlines deal was found by Cheapflights users on 9/10. 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 10/810:57 amONT - BUF
1 stop8h 31mAmerican Airlines
Wed 10/154:25 pmBUF - ONT
1 stop8h 11mAmerican Airlines
Deal found 9/10$327
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.
Sun 11/25:53 amONT - BUF
2 stops10h 16mFrontier
Fri 11/79:53 pmBUF - ONT
2 stops16h 17mFrontier
Deal found 9/11$332

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 2,558,603 searches. Data last updated September 11, 2025.
Use the filters below to find and compare flights from Ontario to Buffalo that are best for you.

Fly from

Ontario

Fly to

Buffalo

Route

Depart

Return

Price

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

Wed 10/1

11:55 am-11:37 pm

1 stop8h 42m

Buffalo

Fri 10/3

4:43 pm-10:23 pm

1 stop8h 40m

$297

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

Wed 11/12

10:25 pm-11:00 am

1 stop9h 35m

Buffalo

Wed 11/19

6:25 pm-11:04 pm

1 stop7h 39m

$297

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

Fri 10/17

10:00 pm-11:01 am

1 stop10h 01m

Buffalo

Tue 10/21

4:35 pm-10:22 pm

1 stop8h 47m

$297

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

Tue 11/11

10:25 pm-11:00 am

1 stop9h 35m

Buffalo

Tue 11/18

6:25 pm-11:04 pm

1 stop7h 39m

$297

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

Fri 10/24

10:00 pm-11:01 am

1 stop10h 01m

Buffalo

Wed 10/29

6:00 am-10:26 am

1 stop7h 26m

$297

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

Sat 10/25

11:36 am-11:39 pm

1 stop9h 03m

Buffalo

Wed 10/29

6:00 am-10:26 am

1 stop7h 26m

$297

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

Sat 10/4

11:55 am-11:37 pm

1 stop8h 42m

Buffalo

Tue 10/7

6:00 am-10:26 am

1 stop7h 26m

$297

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

Mon 10/27

10:00 pm-11:01 am

1 stop10h 01m

Buffalo

Wed 11/19

6:25 pm-11:04 pm

1 stop7h 39m

$297

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

Wed 10/8

1:15 pm-10:46 pm

1 stop6h 31m

Buffalo

Wed 10/15

5:55 pm-10:30 pm

1 stop7h 35m

$307

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

Sun 3/1

10:30 pm-11:16 am

1 stop9h 46m

Buffalo

Tue 3/3

6:00 am-11:38 am

1 stop8h 38m

$311

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Showing 1-10 of 22 results
1
2
3

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.
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

What is the cheapest month to book a flight from Ontario to Buffalo?

Currently, January is the cheapest month in which you can book a flight from Ontario to Buffalo (average of $256). Flying from Ontario to Buffalo in December is currently the most expensive (average of $337). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ONT to BUF?

Find hourly flight availability from Ontario to Buffalo. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 11, 2025.

One of the essential ways to save on airfare from Ontario to Buffalo is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight at noon could potentially save you up to 44% on airfare.

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 11, 2025.
Read reviews from past customers who have flown Southwest, United Airlines, and American 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.
Southwest
8.0
Very good
4,248 reviews

Boarding

8.1

Crew

8.6

Entertainment

7.5

Overall

8.0

Comfort

8.0

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Southwest
8.0
Very good
4,248 reviews
Southwest
8.0
Very good
4,248 reviews

Boarding

8.1

Crew

8.6

Entertainment

7.5

Overall

8.0

Comfort

8.0

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
United Airlines
7.4
Good
8,937 reviews
Southwest
8.0
Very good
4,248 reviews

Boarding

8.1

Crew

8.6

Entertainment

7.5

Overall

8.0

Comfort

8.0

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,248 reviews

Boarding

8.1

Crew

8.6

Entertainment

7.5

Overall

8.0

Comfort

8.0

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

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.

  • How long is the flight from Ontario to Buffalo?

    Airlines like Delta fly from Ontario to Buffalo in about 8h 42m. The time it takes to get you to your destination can typically vary by up to . Ontario and Buffalo are separated by a distance of 2167 mi.

  • What are the cheapest airlines flying from Ontario to Buffalo round-trip?

    According to our current data, American Airlines ($286), United Airlines ($297), and Southwest ($346) offers the cheapest pricing from Ontario to Buffalo. American Airlines is 37% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from Ontario to Buffalo one-way?

    One-way options have recently been found by users for as low as $149 on Delta. Other airlines that offer cheap prices include JetBlue from $187 and United Airlines from $199 one-way.

  • Can I find deals for flights from Ontario to Buffalo that include hotel bookings?

    Yes. In addition to deals on Ontario to Buffalo flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Buffalo?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Buffalo.

  • Can I find deals for business class flights from Ontario to Buffalo?

    Yes. Cheapflights offers flight deals from Ontario to Buffalo by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ontario to Buffalo?

    Currently, January is the cheapest month in which you can book a flight from Ontario to Buffalo (average of $256). Flying from Ontario to Buffalo in December is currently the most expensive (average of $337). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Buffalo?

Book flights to Buffalo if you plan to visit one of these locations
Lockport
Orchard Park
Batavia
Williamsville
Eden
Amherst
West Seneca

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Top 3 airlines flying from Ontario to Buffalo

Discover the top 3 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 2,558,603 searches. Data last updated September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$286Average$446FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$297Average$456FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$346Average$434FlexibilityNo cancel feeOn-time63%

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