HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Buffalo

$171+ 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 7/15. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BUF
Jul 6 — Jul 131
Mon 7/6
Mon 7/13
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 June 6, 2026.

This JetBlue deal was found by Cheapflights users on 6/4. 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.
Sun 8/3011:50 pm
ONT
-
BUF
1 stop11h 46m
JetBlue
Tue 9/13:52 pm
BUF
-
ONT
1 stop9h 43m
JetBlue
Deal found 6/4$296
This United Airlines deal was found by Cheapflights users on 6/1. 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 8/317:13 pm
ONT
-
BUF
2 stops11h 15m
United Airlines
Thu 9/35:58 pm
BUF
-
ONT
1 stop7h 37m
United Airlines
Deal found 6/1$336
This American Airlines deal was found by Cheapflights users on 6/1. 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.
Wed 9/2312:37 pm
ONT
-
BUF
1 stop7h 22m
American Airlines
Thu 10/17:00 am
BUF
-
ONT
1 stop9h 25m
American Airlines
Deal found 6/1$361
This Priceline deal was found by Cheapflights users on 6/5. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2011:50 pm
ONT
-
BUF
1 stop11h 46m
JetBlue
Tue 8/253:52 pm
BUF
-
ONT
1 stop9h 43m
JetBlue
Deal found 6/5$362
This Super.com deal was found by Cheapflights users on 6/5. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/269:10 pm
ONT
-
BUF
1 stop8h 14m
JetBlue
Wed 9/3012:10 pm
BUF
-
ONT
1 stop11h 03m
JetBlue
Deal found 6/5$368
This JetBlue deal was found by Cheapflights users on 6/5. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/289:10 pm
ONT
-
BUF
1 stop8h 14m
JetBlue
Fri 10/164:00 pm
BUF
-
ONT
1 stop9h 09m
JetBlue
Deal found 6/5$373
This American Airlines deal was found by Cheapflights users on 6/6. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/77:15 pm
ONT
-
BUF
2 stops12h 01m
American Airlines
Wed 7/297:01 am
BUF
-
ONT
1 stop7h 44m
American Airlines
Deal found 6/6$396
This CheapOair deal was found by Cheapflights users on 6/5. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/299:10 pm
ONT
-
BUF
1 stop8h 14m
JetBlue
Sat 10/312:10 pm
BUF
-
ONT
1 stop11h 03m
JetBlue
Deal found 6/5$400
This American Airlines deal was found by Cheapflights users on 6/2. 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.
Wed 7/297:15 pm
ONT
-
BUF
2 stops12h 01m
American Airlines
Wed 8/126:00 am
BUF
-
ONT
2 stops10h 31m
American Airlines
Deal found 6/2$402
This Southwest deal was found by Cheapflights users on 6/3. 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.
Tue 7/711:55 pm
ONT
-
BUF
1 stop7h 30m
Southwest
Wed 7/226:00 am
BUF
-
ONT
1 stop9h 05m
Southwest
Deal found 6/3$404

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 June 6, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$296
(JetBlue)

One-way from

$171
(Kiwi.com)

Popular in

July

Cheapest in

September

Average price

$431
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. 3% potential increase in price ($17 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 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 June 6, 2026.
Use the filters below to find and compare flights from Ontario to Buffalo that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

Mon 8/31

7:13 pm-9:28 am

2 stops11h 15m

Buffalo

Thu 9/3

5:58 pm-10:35 pm

1 stop7h 37m

$336

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

Sat 8/29

7:05 am-9:32 pm

2 stops11h 27m

Buffalo

Sun 8/30

6:00 am-10:42 am

1 stop7h 42m

$409

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

Thu 10/1

12:35 pm-11:00 pm

1 stop7h 25m

Buffalo

Mon 10/19

6:30 am-10:20 am

1 stop6h 50m

$425

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

Sun 7/26

11:58 pm-2:37 pm

1 stop11h 39m

Buffalo

Tue 8/4

3:55 pm-10:35 pm

1 stop9h 40m

$427

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

Tue 7/7

11:55 pm-12:10 pm

2 stops9h 15m

Buffalo

Wed 7/29

6:00 am-12:40 pm

2 stops9h 40m

$447

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

Wed 7/15

10:10 am-9:30 pm

2 stops8h 20m

Buffalo

Fri 7/17

4:10 pm-10:40 pm

2 stops9h 30m

$504

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

Tue 6/16

11:55 pm-12:10 pm

2 stops9h 15m

Buffalo

Wed 7/15

11:00 am-5:35 pm

2 stops9h 35m

$517
Quickest round-trip

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

Sat 8/15

1:18 pm-10:37 pm

1 stop6h 19m

Buffalo

Wed 8/19

5:58 pm-10:35 pm

1 stop7h 37m

$518

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

Mon 8/31

7:13 pm-9:28 am

2 stops11h 15m

Buffalo

Wed 9/23

1:59 pm-7:57 pm

1 stop8h 58m

$523
Cheapest one-way

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

Mon 9/28

9:10 pm-8:24 am

1 stop8h 14m

$187

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/6

Showing 1-10 of 20 resultsSorted by cheapest first
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 June.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice 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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Buffalo flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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

How much does it cost to fly round-trip from Ontario to Buffalo?

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 6, 2026.
Read reviews from past customers who have flown Southwest 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
4,256 reviews

Boarding

8.1

Entertainment

7.5

Food

7.0

Overall

8.0

Crew

8.6

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

La Tracimeldamarcos,Jun 2026

LAX - SLC

The second flight was not as comfortable as the first as we had to change planes to what seemed to be a slightly older aircraft. The seats weren’t as comfortable as the other plane. But it wasn’t bad.
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

Crew

8.6

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

La Tracimeldamarcos,Jun 2026

LAX - SLC

The second flight was not as comfortable as the first as we had to change planes to what seemed to be a slightly older aircraft. The seats weren’t as comfortable as the other plane. But it wasn’t bad.
United Airlines
7.4
Good
9,780 reviews
Southwest
8.0
Very good
4,256 reviews

Boarding

8.1

Entertainment

7.5

Food

7.0

Overall

8.0

Crew

8.6

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

La Tracimeldamarcos,Jun 2026

LAX - SLC

The second flight was not as comfortable as the first as we had to change planes to what seemed to be a slightly older aircraft. The seats weren’t as comfortable as the other plane. But it wasn’t bad.

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 United Airlines, Delta, and Southwest fly from Ontario to Buffalo in about 7h 25m. The time it takes to get you to your destination can typically vary by up to 4h 02m. 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, Southwest ($286), and United Airlines ($346) offers the cheapest pricing from Ontario to Buffalo. Southwest is 35% 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.

See more FAQs

Traveling to a place near Buffalo?

Book flights to Buffalo if you plan to visit one of these locations
Lockport
Cheektowaga
Amherst
Batavia
Williamsville
Orchard Park
Eden

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.
San Francisco to Newark flights
San Francisco to John F Kennedy Intl flights
Los Angeles to Newark flights
San Francisco to LaGuardia flights
Los Angeles to John F Kennedy Intl flights
Los Angeles to LaGuardia flights
Ontario to John F Kennedy Intl flights
San Jose to Newark flights
San Jose to John F Kennedy Intl flights
Santa Ana to John F Kennedy Intl flights
Oakland to John F Kennedy Intl flights
Ontario to Newark flights
San Diego to Newark flights
San Diego to John F Kennedy Intl flights
Ontario to LaGuardia flights
Oakland to Newark flights
Santa Ana to Newark flights
San Diego to LaGuardia flights
Burbank to Newark flights
Las Vegas to Newark flights
Sacramento to John F Kennedy Intl flights
Burbank to John F Kennedy Intl flights
Sacramento to Newark flights
Las Vegas to John F Kennedy Intl flights
Las Vegas to LaGuardia flights
Los Angeles to Buffalo flights
Santa Ana to LaGuardia flights
San Jose to LaGuardia flights
Sacramento to LaGuardia flights
San Francisco to White Plains flights
Burbank to LaGuardia flights
Long Beach to John F Kennedy Intl flights
Los Angeles to White Plains flights
Los Angeles to Albany flights
San Francisco to Buffalo flights
Fresno to John F Kennedy Intl flights
Palm Springs to John F Kennedy Intl flights
Los Angeles to Syracuse flights
San Francisco to Albany flights
Oakland to LaGuardia flights
Fresno to Newark flights
Palm Springs to Newark flights
Reno to Newark flights
San Francisco to Rochester flights
Los Angeles to Stewart flights
Palm Springs to LaGuardia flights

Top 2 airlines flying from Ontario to Buffalo

Discover the top 2 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 6, 2026.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$286Average$446FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$346Average$456FlexibilityNo cancel feeOn-time69%

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.