What is the cheapest airline that flies from Ontario to Buffalo?

Delta and United Airlines are the most popular carriers operating from Ontario to Buffalo

What airlines fly to Buffalo?

JetBlue, American Airlines and United Airlines are the top three most popular airlines that fly to Buffalo from Ontario according to our data. JetBlue is the first choice among our users, with 33% of people opting to fly with this airline when traveling to Buffalo. Keep in mind that there are 6 different airlines that fly to Buffalo on a routine basis, so you have a few additional options to choose from.

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?

As of October 2026, there are 2 operators available to choose from 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.

$149 Cheap Flights from Ontario to Buffalo in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Ontario to Buffalo

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12:42 pm - 10:53 pmONT Ontario-BUF Buffalo

7h 11m1 stop Dallas/Fort Worth

4:40 pm - 11:46 pmBUF Buffalo-ONT Ontario

10h 06m1 stop Dallas/Fort Worth

$347American Airlines

Thu, Nov 12 - Sun, Nov 15

1:02 pm - 10:52 pmONT Ontario-BUF Buffalo

6h 50m1 stop Dallas/Fort Worth

7:00 am - 1:24 pmBUF Buffalo-ONT Ontario

9h 24m1 stop Dallas/Fort Worth

$347American Airlines

Thu, Dec 10 - Sun, Dec 13

9:35 am - 9:55 pmONT Ontario-BUF Buffalo

9h 20m2 stops Phoenix Sky Harbor Intl Chicago O'Hare Intl

7:00 am - 1:24 pmBUF Buffalo-ONT Ontario

9h 24m1 stop Dallas/Fort Worth

$352American Airlines

Thu, Dec 10 - Sun, Dec 13

7:49 pm - 10:40 amONT Ontario-BUF Buffalo

11h 51m2 stops Phoenix Sky Harbor Intl Charlotte Douglas

4:40 pm - 11:46 pmBUF Buffalo-ONT Ontario

10h 06m1 stop Dallas/Fort Worth

$352American Airlines

Thu, Nov 12 - Sun, Nov 15

1:40 pm - 10:57 pmONT Ontario-BUF Buffalo

6h 17m1 stop Denver Intl

8:17 am - 12:34 pmBUF Buffalo-ONT Ontario

7h 17m1 stop Denver Intl

$477United Airlines

Thu, Dec 3 - Sun, Dec 6

5:00 am - 8:51 pmONT Ontario-BUF Buffalo

12h 51m2 stops Denver Intl Chicago O'Hare Intl

8:00 am - 12:40 pmBUF Buffalo-ONT Ontario

7h 40m1 stop Denver Intl

$482United Airlines

Wed, Jan 6 - Sun, Jan 10

1:40 pm - 10:57 pmONT Ontario-BUF Buffalo

6h 17m1 stop Denver Intl

6:30 am - 5:36 pmBUF Buffalo-ONT Ontario

14h 06m2 stops Chicago O'Hare Intl San Francisco

$482United Airlines

Thu, Dec 3 - Sun, Dec 6

11:55 pm - 10:05 amONT Ontario-BUF Buffalo

7h 10m1 stop Chicago Midway

8:05 am - 2:40 pmBUF Buffalo-ONT Ontario

9h 35m2 stops Chicago Midway Denver Intl

$529Southwest

Sat, Dec 19 - Fri, Jan 1

8:05 pm - 7:55 amONT Ontario-BUF Buffalo

8h 50m2 stops Las Vegas Harry Reid Intl Baltimore/Washington

8:05 am - 2:40 pmBUF Buffalo-ONT Ontario

9h 35m2 stops Chicago Midway Denver Intl

$534Southwest

Sat, Dec 19 - Fri, Jan 1

6:50 am - 7:40 pmONT Ontario-BUF Buffalo

9h 50m2 stops Dallas Love Field Baltimore/Washington

4:55 pm - 10:45 pmBUF Buffalo-ONT Ontario

8h 50m1 stop Denver Intl

$542Southwest

Mon, Nov 9 - Sun, Nov 22

Cheap last minute flights

Enter your travel dates to find the best prices.

5:33 pm - 5:52 pmONT Ontario-BUF Buffalo

21h 19m2 stops Dallas/Fort Worth Orlando

2:00 pm - 11:51 pmBUF Buffalo-ONT Ontario

12h 51m2 stops Atlanta Hartsfield-Jackson Denver Intl

$889Frontier

Wed, Oct 21 - Wed, Oct 28

5:33 pm - 5:52 pmONT Ontario-BUF Buffalo

21h 19m2 stops Dallas/Fort Worth Orlando

2:00 pm - 11:51 pmBUF Buffalo-ONT Ontario

12h 51m2 stops Atlanta Hartsfield-Jackson Denver Intl

$901Frontier

Wed, Oct 21 - Wed, Oct 28

3:38 pm - 12:59 pmONT Ontario-BUF Buffalo

18h 21m2 stops Las Vegas Harry Reid Intl Atlanta Hartsfield-Jackson

1:44 pm - 11:50 pmBUF Buffalo-ONT Ontario

13h 06m2 stops Atlanta Hartsfield-Jackson Denver Intl

$967Frontier

Thu, Oct 22 - Mon, Oct 26

6:59 am - 5:02 pmONT Ontario-BUF Buffalo

7h 03m1 stop Chicago O'Hare Intl

8:50 am - 12:30 pmBUF Buffalo-ONT Ontario

6h 40m1 stop Denver Intl

$1,042United Airlines

Sun, Oct 25 - Mon, Oct 26

7:00 am - 9:08 amONT Ontario-BUF Buffalo

23h 08m1 stop Chicago O'Hare Intl

8:50 am - 12:30 pmBUF Buffalo-ONT Ontario

6h 40m1 stop Denver Intl

$1,045United Airlines

Fri, Oct 23 - Mon, Oct 26

7:00 am - 8:49 pmONT Ontario-BUF Buffalo

10h 49m1 stop Chicago O'Hare Intl

8:50 am - 12:30 pmBUF Buffalo-ONT Ontario

6h 40m1 stop Denver Intl

$1,045United Airlines

Sat, Oct 24 - Mon, Oct 26

7:34 pm - 10:45 amONT Ontario-BUF Buffalo

12h 11m2 stops Phoenix Sky Harbor Intl Chicago O'Hare Intl

7:00 am - 1:30 pmBUF Buffalo-ONT Ontario

9h 30m1 stop Dallas/Fort Worth

$1,061American Airlines

Fri, Oct 23 - Thu, Oct 29

7:34 pm - 10:45 amONT Ontario-BUF Buffalo

12h 11m2 stops Phoenix Sky Harbor Intl Chicago O'Hare Intl

6:00 am - 1:30 pmBUF Buffalo-ONT Ontario

10h 30m2 stops Washington, D.C. Reagan-National Dallas/Fort Worth

$1,067American Airlines

Fri, Oct 23 - Thu, Oct 29

10:10 pm - 7:03 pmONT Ontario-BUF Buffalo

17h 53m1 stop Charlotte Douglas

11:38 am - 10:59 pmBUF Buffalo-ONT Ontario

14h 21m1 stop Charlotte Douglas

$1,104American Airlines

Fri, Oct 23 - Thu, Oct 29

6:59 am - 5:02 pmONT Ontario-BUF Buffalo

7h 03m1 stop Chicago O'Hare Intl

8:50 am - 12:30 pmBUF Buffalo-ONT Ontario

6h 40m1 stop Denver Intl

$1,607United Airlines

Mon, Oct 26 - Fri, Oct 30

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Southwest flights from Ontario to Buffalo

Our best Southwest deals on Ontario to Buffalo flight tickets

Southwest

Dec 3

ONT10:55 amOntario

7h 00m

1 stop

BUF8:55 pmBuffalo

Dec 7

BUF2:40 pmBuffalo

10h 00m

1 stop

ONT9:40 pmOntario

$393

Southwest

Dec 3

ONT8:40 amOntario

10h 20m

2 stops

BUF10:00 pmBuffalo

Dec 7

BUF2:40 pmBuffalo

10h 00m

1 stop

ONT9:40 pmOntario

$398

Southwest

Dec 10

ONT8:40 amOntario

9h 05m

2 stops

BUF8:45 pmBuffalo

Dec 14

BUF2:40 pmBuffalo

10h 00m

1 stop

ONT9:40 pmOntario

$408

Frontier flights from Ontario to Buffalo

Our best Frontier deals on Ontario to Buffalo flight tickets

Frontier

Dec 3

ONT7:06 pmOntario

14h 13m

2 stops

BUF12:19 pmBuffalo

Dec 7

BUF2:30 pmBuffalo

23h 15m

2 stops

ONT10:45 amOntario

$401

Frontier

Dec 10

ONT7:26 pmOntario

13h 54m

2 stops

BUF12:20 pmBuffalo

Dec 14

BUF1:15 pmBuffalo

24h 30m

2 stops

ONT10:45 amOntario

$445

Frontier

Nov 17

ONT5:07 pmOntario

17h 08m

2 stops

BUF1:15 pmBuffalo

Nov 23

BUF9:20 pmBuffalo

17h 19m

2 stops

ONT11:39 amOntario

$495

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioBuffalo

ONT Ontario - BUF Buffalo

ONTBUF

Ontario

Thu 11/12

12:42 pm-10:53 pm

1 stop7h 11m

Buffalo

Sun 11/15

4:40 pm-11:46 pm

1 stop10h 06m

$347

OntarioBuffalo

ONT Ontario - BUF Buffalo

ONTBUF

Ontario

Thu 12/10

1:02 pm-10:52 pm

1 stop6h 50m

Buffalo

Sun 12/13

7:00 am-1:24 pm

1 stop9h 24m

$347

OntarioBuffalo

ONT Ontario - BUF Buffalo

ONTBUF

Ontario

Thu 12/10

9:35 am-9:55 pm

2 stops9h 20m

Buffalo

Sun 12/13

7:00 am-1:24 pm

1 stop9h 24m

$352

OntarioBuffalo

ONT Ontario - BUF Buffalo

ONTBUF

Ontario

Thu 11/12

7:49 pm-10:40 am

2 stops11h 51m

Buffalo

Sun 11/15

4:40 pm-11:46 pm

1 stop10h 06m

$352

Quickest round-trip

OntarioBuffalo

ONT Ontario - BUF Buffalo

ONTBUF

Ontario

Thu 12/3

1:40 pm-10:57 pm

1 stop6h 17m

Buffalo

Sun 12/6

8:17 am-12:34 pm

1 stop7h 17m

$477

OntarioBuffalo

ONT Ontario - BUF Buffalo

ONTBUF

Ontario

Wed 1/6

5:00 am-8:51 pm

2 stops12h 51m

Buffalo

Sun 1/10

8:00 am-12:40 pm

1 stop7h 40m

$482

OntarioBuffalo

ONT Ontario - BUF Buffalo

ONTBUF

Ontario

Thu 12/3

1:40 pm-10:57 pm

1 stop6h 17m

Buffalo

Sun 12/6

6:30 am-5:36 pm

2 stops14h 06m

$482

OntarioBuffalo

ONT Ontario - BUF Buffalo

ONTBUF

Ontario

Sat 12/19

11:55 pm-10:05 am

1 stop7h 10m

Buffalo

Fri 1/1

8:05 am-2:40 pm

2 stops9h 35m

$529

OntarioBuffalo

ONT Ontario - BUF Buffalo

ONTBUF

Ontario

Sat 12/19

8:05 pm-7:55 am

2 stops8h 50m

Buffalo

Fri 1/1

8:05 am-2:40 pm

2 stops9h 35m

$534

OntarioBuffalo

ONT Ontario - BUF Buffalo

ONTBUF

Ontario

Mon 11/9

6:50 am-7:40 pm

2 stops9h 50m

Buffalo

Sun 11/22

4:55 pm-10:45 pm

1 stop8h 50m

$542

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

What is the cheapest month to fly to Buffalo?

If you aren’t able to travel during the month of March, then book flights to Buffalo from Ontario during February instead. Flights to Buffalo in February, while not as cheap as those in March, still average around $0.

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 $380. Flights from Ontario to Buffalo on a Thursday will generally be more expensive and average around $493. 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 $284. Flying to Buffalo at noon is an ideal time because this is during off-peak travel hours. In the evening is when there is more demand to fly to Buffalo, so prices are often more expensive at around $438 per ticket.

Can stopping save me money on Ontario to Buffalo flights?

You could potentially save up to 54% on your flight if you consider stops on a Ontario to Buffalo flight.

How have Ontario to Buffalo flight prices changed over time?

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

Best Price Found	$149
Fastest flight time	6h 04m
Direct flights	None

The best one-way flight to Buffalo from Ontario in the past 72 hours is $149. The best round-trip flight deal from Ontario to Buffalo found on momondo in the last 72 hours is $347.

The fastest flight from Ontario to Buffalo takes 6h 04m

There are no direct flights from Ontario to Buffalo. There are no popular flight routes from Ontario to Buffalo.

Search flight deals

Frequently asked questions about flying from Ontario to Buffalo

How far is Ontario to Buffalo by plane?
There are 2161.5 mi between Ontario and Buffalo. 6h 04m 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?
As of October 2026, there are 2 operators available to choose from 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?
momondo data reveals that the most frequently booked airline on the route from Ontario to Buffalo is Southwest, representing 57% of all bookings. The subsequent popular airline is United Airlines at 43%.

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
Southwest	PriceFrom $351	Free Cancellation	Rating 7.9 4,213 reviews		Search Southwest flights
United Airlines	PriceFrom $406	Free Cancellation	Rating 7.3 10,388 reviews		Search United Airlines flights

Batavia

Cheektowaga

Amherst

Williamsville

Tonawanda

Bowmansville

Lockport

West Seneca

Orchard Park

Grand Island

East Aurora

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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Cheap flights from Ontario to Buffalo from $149

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 12/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Southwest flights from Ontario to Buffalo

Our best Southwest deals on Ontario to Buffalo flight tickets

Frontier flights from Ontario to Buffalo

Our best Frontier deals on Ontario to Buffalo flight tickets

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See travel insights to Buffalo from

How to get the cheapest flight ticket from Ontario to Buffalo

What is the cheapest month to fly to Buffalo?

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

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

Can stopping save me money on Ontario to Buffalo flights?

How have Ontario to Buffalo flight prices changed over time?

What is the cheapest airline that flies from Ontario to Buffalo?

What airlines fly to Buffalo?

When to book flights from Ontario to Buffalo

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

Best Price Found

Fastest flight time

Direct flights

Frequently asked questions about flying 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

Traveling to a place near Buffalo?

Why use momondo?

An easier way to manage your Buffalo trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

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Airlines are sorted and displayed according to clicks in the past 7 days on momondo

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List of cabin classes available on flights landing in Buffalo. Availability may vary depending on flight origin and airline.

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