HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Buffalo

$154+ 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 1/24. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BUF
Jan 31 — Feb 71
Sat 1/31
Sat 2/7
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to Buffalo with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 January 1, 2026.

This United Airlines deal was found by Cheapflights users on 12/29. 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 12/315:05 amONT - BUF
2 stops8h 49mUnited Airlines
Sun 1/45:35 pmBUF - ONT
1 stop7h 50mUnited Airlines
Deal found 12/29$1,062
This Delta deal was found by Cheapflights users on 12/29. 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 12/317:05 amONT - BUF
2 stops12h 28mDelta
Sun 1/46:10 amBUF - ONT
2 stops9h 19mDelta
Deal found 12/29$1,376
This United Airlines deal was found by Cheapflights users on 12/29. 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 12/3011:59 pmONT - BUF
1 stop13h 55mUnited Airlines
Sat 1/35:35 pmBUF - ONT
1 stop7h 50mUnited Airlines
Deal found 12/29$2,057

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 January 1, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$284
(American Airlines)

One-way from

$154
(Delta)

Popular in

February

Cheapest in

May

Average price

$366
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 January 2026
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 January 1, 2026.
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

10:56 am-10:41 pm

1 stop8h 45m

Buffalo

Tue 2/24

6:30 am-1:49 pm

1 stop10h 19m

$284

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

Wed 2/18

10:20 pm-11:00 am

1 stop9h 40m

Buffalo

Tue 2/24

6:00 am-12:02 pm

1 stop9h 02m

$302

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 5/20

6:54 pm-9:49 am

2 stops11h 55m

Buffalo

Tue 5/26

5:50 pm-10:26 pm

1 stop7h 36m

$382

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

Wed 5/20

10:55 am-10:50 pm

1 stop8h 55m

Buffalo

Tue 5/26

11:10 am-4:20 pm

1 stop8h 10m

$387

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

Thu 5/28

11:25 pm-11:29 am

1 stop9h 04m

Buffalo

Tue 6/2

4:00 pm-10:09 pm

1 stop9h 09m

$405

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

Wed 4/22

10:15 pm-11:01 am

1 stop9h 46m

Buffalo

Fri 4/24

12:06 pm-6:28 pm

1 stop9h 22m

$407

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

Sat 1/24

10:30 pm-11:19 am

1 stop9h 49m

$154

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

Wed 4/29

11:25 pm-11:29 am

1 stop9h 04m

$164

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

Sat 2/14

1:45 pm-10:59 pm

1 stop6h 14m

$181

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/31

Showing 1-10 of 15 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 January.
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.

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 January 1, 2026.
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
4,253 reviews

Boarding

8.1

Overall

8.0

Food

7.0

Comfort

8.0

Crew

8.6

Entertainment

7.5

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
4,253 reviews
Southwest
8.0
Very good
4,253 reviews

Boarding

8.1

Overall

8.0

Food

7.0

Comfort

8.0

Crew

8.6

Entertainment

7.5

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
9,128 reviews
Southwest
8.0
Very good
4,253 reviews

Boarding

8.1

Overall

8.0

Food

7.0

Comfort

8.0

Crew

8.6

Entertainment

7.5

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
11,070 reviews
Southwest
8.0
Very good
4,253 reviews

Boarding

8.1

Overall

8.0

Food

7.0

Comfort

8.0

Crew

8.6

Entertainment

7.5

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 31m. 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ontario to Buffalo

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to John F Kennedy Intl flights
San Francisco to John F Kennedy Intl flights
Los Angeles to Newark flights
Los Angeles to LaGuardia flights
San Francisco to Newark flights
San Francisco to LaGuardia flights
San Diego to John F Kennedy Intl flights
Burbank to LaGuardia flights
San Diego to Newark flights
Ontario to John F Kennedy Intl flights
Ontario to Newark flights
Las Vegas to John F Kennedy Intl flights
San Diego to LaGuardia flights
Ontario to LaGuardia flights
Las Vegas to Newark flights
Santa Ana to LaGuardia flights
Santa Ana to John F Kennedy Intl flights
Santa Ana to Newark flights
Las Vegas to LaGuardia flights
Sacramento to Newark flights
Sacramento to John F Kennedy Intl flights
San Jose to John F Kennedy Intl flights
Sacramento to LaGuardia flights
Burbank to John F Kennedy Intl flights
San Jose to LaGuardia flights
Oakland to John F Kennedy Intl flights
San Jose to Newark flights
Reno to John F Kennedy Intl flights
Oakland to Newark flights
Fresno to LaGuardia flights
Fresno to John F Kennedy Intl flights
Los Angeles to White Plains flights
Reno to Newark flights
Reno to LaGuardia flights
Fresno to Newark flights
Burbank to Newark flights
Los Angeles to Buffalo flights
Oakland to LaGuardia flights
San Francisco to White Plains flights
Palm Springs to John F Kennedy Intl flights
Long Beach to John F Kennedy Intl flights
Palm Springs to Newark flights
Los Angeles to Islip flights
Palm Springs to LaGuardia flights
Long Beach to Newark flights
San Francisco to Syracuse flights
Los Angeles to Albany flights
Los Angeles to Syracuse flights
San Francisco to Buffalo flights

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 January 1, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$168Average$411FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$297Average$456FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$353Average$437FlexibilityNo cancel feeOn-time63%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.