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$85+ 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 9/9. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BUF
Jul 12 — Jul 191
Sat 7/12
Sat 7/19
1 adult, Economy
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Cheapflights Tip: The best prices from Ontario to Buffalo are usually found in May or September, booked 29 days in advance, depart on a Monday or Wednesday and return on a Saturday

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 July 7, 2025.

Round-trip from

$291
(JetBlue)

One-way from

$85
(Southwest)

Popular in

November

Cheapest in

May

Average price

$473
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. 13% potential increase in price ($72 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 July 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 July 7, 2025.

This JetBlue deal was found by Cheapflights users on 7/6. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/111:59 pmONT - BUF
1 stop8h 43mJetBlue
Fri 8/812:41 pmBUF - ONT
1 stop12h 29mJetBlue
Deal found 7/6$291
This Delta deal was found by Cheapflights users on 7/7. 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.
Wed 7/3011:50 amONT - BUF
1 stop9h 09mDelta
Tue 8/56:00 amBUF - ONT
1 stop7h 30mDelta
Deal found 7/7$297
This Frontier deal was found by Cheapflights users on 7/6. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/812:59 amONT - BUF
1 stop12h 18mFrontier
Wed 7/165:12 pmBUF - ONT
1 stop9h 38mFrontier
Deal found 7/6$308
This American Airlines deal was found by Cheapflights users on 7/5. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2911:59 pmONT - BUF
1 stop8h 05mAmerican Airlines
Sun 8/317:08 amBUF - ONT
1 stop9h 33mAmerican Airlines
Deal found 7/5$332
This Southwest deal was found by Cheapflights users on 7/5. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/291:25 pmONT - BUF
1 stop6h 10mSouthwest
Mon 9/15:50 amBUF - ONT
1 stop8h 45mSouthwest
Deal found 7/5$360
This United Airlines deal was found by Cheapflights users on 7/6. 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.
Wed 8/207:00 amONT - BUF
1 stop6h 52mUnited Airlines
Wed 8/278:33 amBUF - ONT
1 stop6h 59mUnited Airlines
Deal found 7/6$387

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 July 7, 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

Fri 8/1

11:59 pm-11:42 am

1 stop8h 43m

Buffalo

Fri 8/8

12:41 pm-10:10 pm

1 stop12h 29m

$291

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

Wed 7/30

11:50 am-11:59 pm

1 stop9h 09m

Buffalo

Tue 8/5

6:00 am-10:30 am

1 stop7h 30m

$297

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

Thu 8/28

12:59 am-4:00 pm

1 stop12h 01m

Buffalo

Sun 8/31

2:22 pm-11:50 pm

1 stop12h 28m

$325

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

Fri 8/29

11:59 pm-11:04 am

1 stop8h 05m

Buffalo

Sun 8/31

7:08 am-1:41 pm

1 stop9h 33m

$332

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

Fri 8/29

1:25 pm-10:35 pm

1 stop6h 10m

Buffalo

Mon 9/1

5:50 am-11:35 am

1 stop8h 45m

$360

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

Wed 8/20

7:00 am-4:52 pm

1 stop6h 52m

Buffalo

Wed 8/27

8:33 am-12:32 pm

1 stop6h 59m

$387

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

Tue 9/9

6:30 am-5:00 pm

1 stop7h 30m

$85

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

Sun 7/13

12:59 am-1:16 pm

1 stop9h 17m

$143

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

Tue 9/30

10:53 am-10:46 pm

1 stop8h 53m

$145

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

Tue 8/26

11:45 am-11:57 pm

1 stop9h 12m

$149

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/6

Showing 1-10 of 12 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

How far ahead should I book a flight from Ontario to Buffalo?

Use this chart to determine the optimal time to book a round-trip flight from Ontario to Buffalo. Price data was last updated on June 27, 2025.

The best time to book flights from Ontario to Buffalo is 29 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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 July 7, 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 July 7, 2025.
Read reviews from past customers who have flown Southwest, Delta, 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.
Southwest
8.0
Very good
4,257 reviews

Entertainment

7.6

Overall

8.0

Crew

8.6

Comfort

8.0

Boarding

8.2

Food

7.0

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
Southwest
8.0
Very good
4,257 reviews
Southwest
8.0
Very good
4,257 reviews

Entertainment

7.6

Overall

8.0

Crew

8.6

Comfort

8.0

Boarding

8.2

Food

7.0

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
Delta
8.0
Very good
7,962 reviews
Southwest
8.0
Very good
4,257 reviews

Entertainment

7.6

Overall

8.0

Crew

8.6

Comfort

8.0

Boarding

8.2

Food

7.0

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
United Airlines
7.4
Good
8,844 reviews
Southwest
8.0
Very good
4,257 reviews

Entertainment

7.6

Overall

8.0

Crew

8.6

Comfort

8.0

Boarding

8.2

Food

7.0

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
JetBlue
7.3
Good
2,909 reviews
Southwest
8.0
Very good
4,257 reviews

Entertainment

7.6

Overall

8.0

Crew

8.6

Comfort

8.0

Boarding

8.2

Food

7.0

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,257 reviews

Entertainment

7.6

Overall

8.0

Crew

8.6

Comfort

8.0

Boarding

8.2

Food

7.0

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

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, JetBlue ($291), Delta ($297), and Frontier ($325) offers the cheapest pricing from Ontario to Buffalo. JetBlue is 36% 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 $85 on Southwest. Other airlines that offer cheap prices include Frontier from $143 and American Airlines from $145 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 Ontario?

Book flights to Ontario if you plan to visit one of these locations
Williamsville
Orchard Park
Batavia
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 July 7, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$236Average$431FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$346Average$432FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$346Average$456FlexibilityNo cancel feeOn-time69%

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