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Cheap flights from Ontario to Buffalo from $131

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Buffalo departing on 12/4. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Ontario to Buffalo

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
8:04 pm - 10:42 amONT-BUF
11h 38m2 stops
American Airlines Logo
6:37 am - 1:44 pmBUF-ONT
10h 07m1 stop
$298American Airlines
Find Deal
Wed, Feb 18 - Tue, Feb 24
Delta Logo
10:30 pm - 11:16 amONT-BUF
9h 46m1 stop
Delta Logo
6:00 am - 11:38 amBUF-ONT
8h 38m1 stop
$302Delta
Find Deal
Wed, Feb 18 - Tue, Feb 24
American Airlines Logo
10:38 am - 10:18 pmONT-BUF
8h 40m2 stops
American Airlines Logo
1:35 pm - 9:40 pmBUF-ONT
11h 05m2 stops
$303American Airlines
Find Deal
Wed, Feb 18 - Tue, Feb 24
Delta Logo
12:12 pm - 11:59 pmONT-BUF
8h 47m1 stop
Delta Logo
6:00 am - 11:02 amBUF-ONT
8h 02m1 stop
$329Delta
Find Deal
Mon, Dec 8 - Tue, Dec 9
Delta Logo
12:12 pm - 11:59 pmONT-BUF
8h 47m1 stop
Delta Logo
6:12 am - 12:21 pmBUF-ONT
9h 09m2 stops
$334Delta
Find Deal
Mon, Dec 8 - Tue, Dec 9
American Airlines Logo
7:30 pm - 9:37 amONT-BUF
11h 07m2 stops
American Airlines Logo
6:12 am - 2:02 pmBUF-ONT
10h 50m1 stop
$356American Airlines
Find Deal
Thu, Nov 13 - Thu, Nov 20
Southwest Logo
10:50 am - 11:40 pmONT-BUF
9h 50m1 stop
Southwest Logo
6:15 am - 10:35 amBUF-ONT
7h 20m1 stop
$385Southwest
Find Deal
Thu, Nov 13 - Thu, Nov 20
United Airlines Logo
6:00 am - 11:46 pmONT-BUF
14h 46m2 stops
United Airlines Logo
5:45 am - 6:00 pmBUF-ONT
15h 15m3 stops
$408United Airlines
Find Deal
Wed, Feb 18 - Tue, Feb 24
United Airlines Logo
1:29 pm - 10:52 pmONT-BUF
6h 23m1 stop
United Airlines Logo
5:40 pm - 10:31 pmBUF-ONT
7h 51m1 stop
$452United Airlines
Find Deal
Thu, Nov 6 - Sun, Nov 9
Southwest Logo
10:50 am - 11:40 pmONT-BUF
9h 50m1 stop
Southwest Logo
6:00 am - 12:25 pmBUF-ONT
9h 25m2 stops
$459Southwest
Find Deal
Thu, Nov 6 - Sun, Nov 9

American Airlines flights from Ontario to Buffalo

Our best American Airlines deals on Ontario to Buffalo flight tickets
American Airlines
Feb 18
ONT10:38 amOntario
8h 40m
2 stops
BUF10:18 pmBuffalo
Feb 24
BUF6:37 amBuffalo
10h 07m
1 stop
ONT1:44 pmOntario
$298
Find similar
American Airlines
Feb 18
ONT10:38 amOntario
8h 40m
2 stops
BUF10:18 pmBuffalo
Feb 24
BUF1:35 pmBuffalo
11h 05m
2 stops
ONT9:40 pmOntario
$303
Find similar
American Airlines
Nov 13
ONT7:30 pmOntario
11h 07m
2 stops
BUF9:37 amBuffalo
Nov 20
BUF6:12 amBuffalo
10h 50m
1 stop
ONT2:02 pmOntario
$356
Find similar

Delta flights from Ontario to Buffalo

Our best Delta deals on Ontario to Buffalo flight tickets
Delta
Feb 18
ONT10:30 pmOntario
9h 46m
1 stop
BUF11:16 amBuffalo
Feb 24
BUF6:00 amBuffalo
8h 38m
1 stop
ONT11:38 amOntario
$302
Find similar
Delta
Dec 8
ONT12:12 pmOntario
8h 47m
1 stop
BUF11:59 pmBuffalo
Dec 9
BUF6:00 amBuffalo
8h 02m
1 stop
ONT11:02 amOntario
$329
Find similar
Delta
Dec 8
ONT12:12 pmOntario
8h 47m
1 stop
BUF11:59 pmBuffalo
Dec 9
BUF6:12 amBuffalo
9h 09m
2 stops
ONT12:21 pmOntario
$334
Find similar

momondo 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, momondo users made 832,500 searches. Data last updated October 16, 2025.
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

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

Wed 2/18

8:04 pm-10:42 am

2 stops11h 38m

Buffalo

Tue 2/24

6:37 am-1:44 pm

1 stop10h 07m

$298

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

Wed 2/18

10:30 pm-11:16 am

1 stop9h 46m

Buffalo

Tue 2/24

6:00 am-11:38 am

1 stop8h 38m

$302

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

Wed 2/18

10:38 am-10:18 pm

2 stops8h 40m

Buffalo

Tue 2/24

1:35 pm-9:40 pm

2 stops11h 05m

$303

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

Mon 12/8

12:12 pm-11:59 pm

1 stop8h 47m

Buffalo

Tue 12/9

6:00 am-11:02 am

1 stop8h 02m

$329

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

Mon 12/8

12:12 pm-11:59 pm

1 stop8h 47m

Buffalo

Tue 12/9

6:12 am-12:21 pm

2 stops9h 09m

$334

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

Thu 11/13

7:30 pm-9:37 am

2 stops11h 07m

Buffalo

Thu 11/20

6:12 am-2:02 pm

1 stop10h 50m

$356

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

Thu 11/13

10:50 am-11:40 pm

1 stop9h 50m

Buffalo

Thu 11/20

6:15 am-10:35 am

1 stop7h 20m

$385

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

Wed 2/18

6:00 am-11:46 pm

2 stops14h 46m

Buffalo

Tue 2/24

5:45 am-6:00 pm

3 stops15h 15m

$408

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

Thu 11/6

1:29 pm-10:52 pm

1 stop6h 23m

Buffalo

Sun 11/9

5:40 pm-10:31 pm

1 stop7h 51m

$452

OntarioBuffalo

ONT - BUF

ONTBUF

Ontario

Thu 11/6

10:50 am-11:40 pm

1 stop9h 50m

Buffalo

Sun 11/9

6:00 am-12:25 pm

2 stops9h 25m

$459

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Buffalo from

How to get the cheapest flight ticket from Ontario to Buffalo

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Buffalo?

If you aren’t able to travel during the month of January, then book flights to Buffalo from Ontario during May instead. Flights to Buffalo in May, while not as cheap as those in January, still average around $346.

What is the cheapest day to depart on your flight to Buffalo?

Our data shows that Monday is the least expensive day to fly to Buffalo. Tickets to fly out on this day can be as low as $289. Flights from Ontario to Buffalo on a Friday will generally be more expensive and average around $391. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Buffalo?

At noon is the cheapest time of day to fly from Ontario to Buffalo when you can find flight prices for as low as $297. Flying to Buffalo at noon is an ideal time because this is during off-peak travel hours. In the morning is when there is more demand to fly to Buffalo, so prices are often more expensive at around $360 per ticket.

How have Ontario to Buffalo flight prices changed over time?

As of October 2025, prices for Ontario to Buffalo flights are approximately 53% more expensive when compared to flights at the same time last year.

When to book flights from Ontario to Buffalo

Are you open to changing your travel dates? Check out the ideal times to fly from Ontario to Buffalo according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Ontario to Buffalo (ONT to BUF) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to Buffalo

Direct flights

None
There are no direct flights from Ontario to Buffalo. There are no popular flight routes from Ontario to Buffalo.
Search flight deals

  • How far is Ontario to Buffalo by plane?

    There are 2161.5 mi between Ontario and Buffalo. 6h 20m is a normal flight duration for this route.

  • When did momondo last update prices for flights from Ontario Airport to Buffalo Airport?

    Prices for flights from Ontario Airport to Buffalo Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Ontario Airport to Buffalo Airport?

  • How old do you have to be to fly from Ontario Airport to Buffalo Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Buffalo Airport.

  • What documentation or ID do you need to fly to Buffalo Airport?

    The required travel and health documents for your Buffalo Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Buffalo Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular airline from Ontario to Buffalo?

Best airlines flying from Ontario to Buffalo

Compare and see reviews for airlines that fly from Ontario to Buffalo with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $286Free CancellationRating
7.2
11,043 reviews
Search American Airlines flights
United AirlinesPriceFrom $297Free CancellationRating
7.4
8,982 reviews
Search United Airlines flights
SouthwestPriceFrom $353Free CancellationRating
8.0
4,241 reviews
Search Southwest flights

Traveling to a place near Buffalo?

Book flights to Buffalo if you plan to visit one of these locations
Batavia
Cheektowaga
Amherst
Tonawanda
Grand Island
Williamsville
Orchard Park
Lockport
West Seneca
East Aurora
Bowmansville
Eden
Angola

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Buffalo?

It is quick and easy to find Ontario to Buffalo flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Buffalo that suits you.

Can I find flights from Ontario to Buffalo with flexible booking policies on momondo?

Yes. All flights to Buffalo from Ontario on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Ontario to Buffalo?

momondo provides multiple filters to help you find the best flight to Buffalo from Ontario. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Ontario to Buffalo right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Ontario to Buffalo flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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