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$136+ 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 1/17. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BUF
Jan 27 — Feb 31
Tue 1/27
Tue 2/3
1 adult, Economy
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Cheap 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 December 28, 2025.

This United Airlines deal was found by Cheapflights users on 12/27. 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.
Sun 12/285:05 amONT - BUF
2 stops8h 49mUnited Airlines
Sun 1/45:35 pmBUF - ONT
1 stop7h 50mUnited Airlines
Deal found 12/27$982
This Southwest deal was found by Cheapflights users on 12/26. 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 12/276:45 pmONT - BUF
2 stops10h 10mSouthwest
Wed 12/312:05 pmBUF - ONT
1 stop9h 40mSouthwest
Deal found 12/26$1,062
This Delta deal was found by Cheapflights users on 12/26. 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 12/2710:29 pmONT - BUF
2 stops9h 52mDelta
Tue 12/306:00 amBUF - ONT
2 stops13h 12mDelta
Deal found 12/26$1,067
This United Airlines deal was found by Cheapflights users on 12/26. 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 12/306:39 pmONT - BUF
2 stops12h 07mUnited Airlines
Fri 1/21:59 pmBUF - ONT
2 stops11h 42mUnited Airlines
Deal found 12/26$1,647
This American Airlines deal was found by Cheapflights users on 12/26. 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 12/3012:45 pmONT - BUF
1 stop6h 44mAmerican Airlines
Fri 1/26:24 amBUF - ONT
1 stop8h 29mAmerican Airlines
Deal found 12/26$1,942
This United Airlines deal was found by Cheapflights users on 12/27. 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 12/2911:59 pmONT - BUF
1 stop10h 25mUnited Airlines
Mon 1/55:35 pmBUF - ONT
1 stop7h 50mUnited Airlines
Deal found 12/27$2,439
This United Airlines deal was found by Cheapflights users on 12/26. 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 12/2911:59 pmONT - BUF
1 stop10h 25mUnited Airlines
Fri 1/21:59 pmBUF - ONT
1 stop11h 26mUnited Airlines
Deal found 12/26$2,493

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 December 28, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$284
(American Airlines)

One-way from

$136
(American Airlines)

Popular in

February

Cheapest in

May

Average price

$470
Provider with most accurate pricing for Ontario-Buffalo flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ontario-Buffalo flights.
Search Deals
From Ontario to Buffalo
Search Deals
One-way flight from Ontario to Buffalo
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($43 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($16 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

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 December 28, 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 2/18

10:59 am-10:34 pm

1 stop8h 35m

Buffalo

Tue 2/24

1:31 pm-7:57 pm

1 stop9h 26m

$284

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

Sat 2/14

1:45 pm-10:59 pm

1 stop6h 14m

Buffalo

Wed 2/18

8:25 am-12:43 pm

1 stop7h 18m

$361

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

Wed 2/11

1:24 pm-11:02 pm

1 stop6h 38m

Buffalo

Wed 2/18

8:25 am-12:43 pm

1 stop7h 18m

$384

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

Wed 6/3

9:55 pm-8:10 am

1 stop7h 15m

Buffalo

Wed 6/10

6:00 am-12:05 pm

1 stop9h 05m

$407

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

Sat 1/17

6:32 pm-10:49 am

2 stops13h 17m

Buffalo

Tue 1/20

10:45 am-8:58 pm

2 stops13h 13m

$429

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

Wed 2/18

1:45 pm-10:59 pm

1 stop6h 14m

$181

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

Sat 2/14

5:00 am-8:51 pm

2 stops12h 51m

$186

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

Wed 2/11

5:05 am-10:31 pm

2 stops14h 26m

$209

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

Wed 1/21

6:00 am-8:29 pm

2 stops11h 29m

$209

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

Sat 1/24

5:05 am-8:29 pm

2 stops12h 24m

$209

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/27

Showing 1-10 of 14 results
1
2

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 December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Ontario-Buffalo flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Ontario-Buffalo flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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.
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, September is the cheapest month in which you can book a flight from Ontario to Buffalo (average of $147). Flying from Ontario to Buffalo in March is currently the most expensive (average of $251). 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 December 28, 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 43% 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 December 28, 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
4,256 reviews

Boarding

8.1

Entertainment

7.5

Food

7.0

Overall

8.0

Comfort

8.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
Southwest
8.0
Very good
4,256 reviews
Southwest
8.0
Very good
4,256 reviews

Boarding

8.1

Entertainment

7.5

Food

7.0

Overall

8.0

Comfort

8.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
United Airlines
7.4
Good
9,113 reviews
Southwest
8.0
Very good
4,256 reviews

Boarding

8.1

Entertainment

7.5

Food

7.0

Overall

8.0

Comfort

8.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
American Airlines
7.2
Good
11,073 reviews
Southwest
8.0
Very good
4,256 reviews

Boarding

8.1

Entertainment

7.5

Food

7.0

Overall

8.0

Comfort

8.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.

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 American Airlines and United Airlines fly from Ontario to Buffalo in about 6h 14m. The time it takes to get you to your destination can typically vary by up to 2h 21m. Ontario and Buffalo are separated by a distance of 2167 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    According to our current data, American Airlines ($168), United Airlines ($297), and Southwest ($353) offers the cheapest pricing from Ontario to Buffalo. American Airlines is 61% 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 $143 on American Airlines. Other airlines that offer cheap prices include Southwest from $168 and United Airlines from $193 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, September is the cheapest month in which you can book a flight from Ontario to Buffalo (average of $147). Flying from Ontario to Buffalo in March is currently the most expensive (average of $251). 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
Cheektowaga
Batavia
Williamsville
Orchard Park
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 December 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$168Average$411FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$297Average$456FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$353Average$437FlexibilityNo cancel feeOn-time63%

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