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$144+ 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 9/30. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BUF
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$296
(Frontier)

One-way from

$144
(American Airlines)

Popular in

November

Cheapest in

May

Average price

$531
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 June 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 June 12, 2025.

This Frontier deal was found by Cheapflights users on 6/12. 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 8/1012:59 amONT - BUF
1 stop9h 17mFrontier
Wed 8/135:12 pmBUF - ONT
1 stop9h 38mFrontier
Deal found 6/12$296
This Delta deal was found by Cheapflights users on 6/11. 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.
Mon 8/410:05 pmONT - BUF
1 stop9h 57mDelta
Tue 8/1212:02 pmBUF - ONT
1 stop10h 09mDelta
Deal found 6/11$297
This American Airlines deal was found by Cheapflights users on 6/10. 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.
Thu 9/1812:46 pmONT - BUF
1 stop6h 59mAmerican Airlines
Fri 9/267:00 amBUF - ONT
1 stop9h 50mAmerican Airlines
Deal found 6/10$332
This JetBlue deal was found by Cheapflights users on 6/10. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/2711:59 pmONT - BUF
1 stop8h 45mJetBlue
Tue 7/112:29 pmBUF - ONT
1 stop12h 30mJetBlue
Deal found 6/10$368
This United Airlines deal was found by Cheapflights users on 6/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/127:00 amONT - BUF
1 stop6h 55mUnited Airlines
Tue 8/195:54 pmBUF - ONT
1 stop7h 36mUnited Airlines
Deal found 6/11$387
This Southwest deal was found by Cheapflights users on 6/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/129:20 pmONT - BUF
1 stop7h 40mSouthwest
Mon 7/143:20 pmBUF - ONT
2 stops10h 50mSouthwest
Deal found 6/10$403
This Alaska Airlines deal was found by Cheapflights users on 6/11. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/47:22 pmONT - BUF
2 stops12h 49mAlaska Airlines
Tue 9/95:38 amBUF - ONT
2 stops11h 31mAlaska Airlines
Deal found 6/11$492

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 June 12, 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

Sun 8/10

12:59 am-1:16 pm

1 stop9h 17m

Buffalo

Wed 8/13

5:12 pm-11:50 pm

1 stop9h 38m

$296

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

Mon 8/4

10:05 pm-11:02 am

1 stop9h 57m

Buffalo

Tue 8/12

12:02 pm-7:11 pm

1 stop10h 09m

$297

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

Thu 9/18

12:46 pm-10:45 pm

1 stop6h 59m

Buffalo

Fri 9/26

7:00 am-1:50 pm

1 stop9h 50m

$332

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

Fri 6/27

11:59 pm-11:44 am

1 stop8h 45m

Buffalo

Tue 7/1

12:29 pm-9:59 pm

1 stop12h 30m

$368

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

Tue 8/12

7:00 am-4:55 pm

1 stop6h 55m

Buffalo

Tue 8/19

5:54 pm-10:30 pm

1 stop7h 36m

$387

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

Sat 7/12

9:20 pm-8:00 am

1 stop7h 40m

Buffalo

Mon 7/14

3:20 pm-11:10 pm

2 stops10h 50m

$403

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

Thu 9/4

7:22 pm-11:11 am

2 stops12h 49m

Buffalo

Tue 9/9

5:38 am-2:09 pm

2 stops11h 31m

$492

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

Tue 9/30

12:46 pm-10:46 pm

1 stop7h 00m

$144

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

Tue 7/29

11:59 pm-11:56 am

1 stop8h 57m

$156

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

Sun 9/28

12:59 am-12:43 pm

1 stop8h 44m

$180

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 13 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 9, 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 June 12, 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.

Rainfall in Buffalo by month

Plan your trip to Buffalo by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Buffalo ranges from 2.5 - 4.0 inches per month. November is typically the wettest month, when rainfall can reach 4.0 in. February is typically the driest time to visit Buffalo when rainfall is around 2.5 in.

Temperature in Buffalo by month

Plan your trip to Buffalo by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Buffalo, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 71.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 24.8 F).

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 June 12, 2025.
To help decide which airline to fly from Ontario to Buffalo, see what other customers have to say about Alaska Airlines, Southwest and Delta. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Entertainment

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Entertainment

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,287 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Entertainment

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,950 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Entertainment

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Entertainment

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
JetBlue
7.3
Good
2,925 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Entertainment

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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, Frontier ($296), Delta ($297), and American Airlines ($332) offers the cheapest pricing from Ontario to Buffalo. Frontier is 35% 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 $144 on American Airlines. Other airlines that offer cheap prices include JetBlue from $156 and Frontier from $180 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
Amherst
Orchard Park
Batavia
Eden
Cheektowaga
West Seneca

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Top 4 airlines flying from Ontario to Buffalo

Discover the top 4 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$236Average$445FlexibilityNo cancel feeOn-time71%
DeltaCheapest$266Average$451FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$286Average$457FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$346Average$432FlexibilityNo cancel feeOn-time63%

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