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$81+ 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 10/17. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BUF
ago. 19 — ago. 261
mar. 8/19
mar. 8/26
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 agosto 14, 2025.

Round-trip from

$229
(Frontier)

One-way from

$81
(Frontier)

Popular in

November

Cheapest in

September

Average price

$389
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 ($75 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 August 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 agosto 14, 2025.

This Frontier deal was found by Cheapflights users on 8/13. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 9/283:43 pmONT - BUF
2 stops16h 39mFrontier
dom. 10/54:57 pmBUF - ONT
2 stops17h 20mFrontier
Deal found 8/13$229
This American Airlines deal was found by Cheapflights users on 8/13. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/912:45 pmONT - BUF
1 stop7h 23mAmerican Airlines
mar. 9/167:00 amBUF - ONT
1 stop9h 54mAmerican Airlines
Deal found 8/13$251
This American Airlines deal was found by Cheapflights users on 8/14. 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.
vie. 9/1210:53 amONT - BUF
1 stop9h 15mAmerican Airlines
mié. 9/177:00 amBUF - ONT
1 stop9h 54mAmerican Airlines
Deal found 8/14$269
This Frontier deal was found by Cheapflights users on 8/14. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 8/2112:59 amONT - BUF
2 stops16h 11mFrontier
lun. 8/254:55 pmBUF - ONT
1 stop9h 55mFrontier
Deal found 8/14$273
This American Airlines deal was found by Cheapflights users on 8/14. 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.
vie. 10/2411:59 pmONT - BUF
2 stops11h 53mAmerican Airlines
mié. 10/292:30 pmBUF - ONT
1 stop10h 06mAmerican Airlines
Deal found 8/14$274
This Frontier deal was found by Cheapflights users on 8/14. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 8/215:09 pmONT - BUF
2 stops15h 29mFrontier
dom. 8/242:22 pmBUF - ONT
1 stop12h 28mFrontier
Deal found 8/14$277
This FlightHub deal was found by Cheapflights users on 8/14. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 8/1412:59 amONT - BUF
1 stop9h 17mFrontier
vie. 8/224:55 pmBUF - ONT
1 stop9h 55mFrontier
Deal found 8/14$284
This Frontier deal was found by Cheapflights users on 8/13. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/2912:59 amONT - BUF
2 stops13h 55mFrontier
lun. 11/34:39 pmBUF - ONT
2 stops10h 11mFrontier
Deal found 8/13$289
This Delta deal was found by Cheapflights users on 8/13. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 9/311:45 amONT - BUF
1 stop9h 12mDelta
vie. 9/124:43 pmBUF - ONT
1 stop8h 40mDelta
Deal found 8/13$297

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 agosto 14, 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

dom. 9/28

3:43 pm-11:22 am

2 stops16h 39m

Buffalo

dom. 10/5

4:57 pm-7:17 am

2 stops17h 20m

$229

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

mié. 9/10

10:53 am-11:08 pm

1 stop9h 15m

Buffalo

mié. 9/17

6:00 am-1:54 pm

2 stops10h 54m

$256

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

mar. 9/9

6:10 am-9:43 pm

2 stops12h 33m

Buffalo

mar. 9/16

11:00 am-6:54 pm

2 stops10h 54m

$261

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

sáb. 9/13

10:35 pm-11:00 am

1 stop9h 25m

Buffalo

mié. 9/17

7:00 am-11:57 am

1 stop7h 57m

$269

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

vie. 9/12

10:53 am-11:08 pm

1 stop9h 15m

Buffalo

mié. 9/17

7:00 am-1:54 pm

1 stop9h 54m

$269

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

vie. 9/12

6:50 pm-9:46 am

2 stops11h 56m

Buffalo

mié. 9/17

5:54 pm-10:30 pm

1 stop7h 36m

$274

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

jue. 10/30

12:48 pm-10:28 pm

1 stop6h 40m

Buffalo

mar. 11/4

6:24 am-4:01 pm

2 stops12h 37m

$274

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

vie. 10/24

11:59 pm-2:44 pm

2 stops11h 45m

Buffalo

mié. 10/29

6:02 pm-10:42 pm

1 stop7h 40m

$274

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

vie. 11/14

8:24 am-10:08 am

2 stops22h 44m

Buffalo

lun. 11/17

12:29 pm-11:50 pm

2 stops14h 21m

$279

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

lun. 10/20

6:53 am-4:29 pm

1 stop6h 36m

$81

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/14

Showing 1-10 of 18 results
1
2

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 agosto 14, 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 agosto 14, 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
4,244 reviews

Comfort

8.0

Entertainment

7.5

Crew

8.6

Food

7.0

Boarding

8.1

Overall

8.0

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
4,244 reviews
Southwest
8.0
Very good
4,244 reviews

Comfort

8.0

Entertainment

7.5

Crew

8.6

Food

7.0

Boarding

8.1

Overall

8.0

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
8,916 reviews
Southwest
8.0
Very good
4,244 reviews

Comfort

8.0

Entertainment

7.5

Crew

8.6

Food

7.0

Boarding

8.1

Overall

8.0

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
4,244 reviews

Comfort

8.0

Entertainment

7.5

Crew

8.6

Food

7.0

Boarding

8.1

Overall

8.0

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.

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

    According to our current data, American Airlines ($236), Southwest ($346), and United Airlines ($346) offers the cheapest pricing from Ontario to Buffalo. American Airlines is 48% cheaper than the average price of flights available within the next 90 days to this destination.

  • 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 agosto 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$236Average$386FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$346Average$435FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$346Average$456FlexibilityNo cancel feeOn-time69%

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