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

United Airlines, Delta, and American 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 31% 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 September 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.

$145 Cheap Flights from Ontario to Buffalo in 2026

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Find the cheapest flights from Ontario to Buffalo

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One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

5:33 pm - 12:59 pmONT Ontario-BUF Buffalo

40h 26m2 stops Dallas/Fort Worth Atlanta Hartsfield-Jackson

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

13h 06m2 stops Atlanta Hartsfield-Jackson Denver Intl

$366Frontier

Wed, Oct 21 - Sat, Oct 24

8:25 am - 10:10 pmONT Ontario-BUF Buffalo

10h 45m2 stops Dallas/Fort Worth Chicago O'Hare Intl

4:47 pm - 10:37 pmBUF Buffalo-ONT Ontario

8h 50m1 stop Dallas/Fort Worth

$385American Airlines

Sat, Sep 26 - Tue, Sep 29

8:25 am - 10:10 pmONT Ontario-BUF Buffalo

10h 45m2 stops Dallas/Fort Worth Chicago O'Hare Intl

12:56 pm - 10:37 pmBUF Buffalo-ONT Ontario

12h 41m2 stops Charlotte Douglas Dallas/Fort Worth

$390American Airlines

Sat, Sep 26 - Tue, Sep 29

11:55 pm - 10:30 amONT Ontario-BUF Buffalo

7h 35m1 stop Chicago Midway

7:30 pm - 11:55 pmBUF Buffalo-ONT Ontario

7h 25m1 stop Las Vegas Harry Reid Intl

$395Southwest

Fri, Oct 16 - Mon, Oct 19

9:30 am - 10:52 pmONT Ontario-BUF Buffalo

10h 22m2 stops Phoenix Sky Harbor Intl Dallas/Fort Worth

12:30 pm - 9:57 pmBUF Buffalo-ONT Ontario

12h 27m2 stops Boston Logan Intl Phoenix Sky Harbor Intl

$395American Airlines

Tue, Dec 22 - Tue, Dec 29

9:30 pm - 10:30 amONT Ontario-BUF Buffalo

10h 00m2 stops Las Vegas Harry Reid Intl Chicago Midway

7:30 pm - 11:55 pmBUF Buffalo-ONT Ontario

7h 25m1 stop Las Vegas Harry Reid Intl

$400Southwest

Fri, Oct 16 - Mon, Oct 19

11:55 pm - 10:25 amONT Ontario-BUF Buffalo

7h 30m1 stop Chicago Midway

2:00 pm - 6:15 pmBUF Buffalo-ONT Ontario

7h 15m1 stop Chicago Midway

$438Southwest

Fri, Nov 6 - Tue, Nov 17

1:29 pm - 10:33 pmONT Ontario-BUF Buffalo

6h 04m1 stop Denver Intl

10:35 am - 8:51 pmBUF Buffalo-ONT Ontario

13h 16m2 stops Washington, D.C. Dulles Intl Denver Intl

$492United Airlines

Tue, Nov 10 - Wed, Nov 11

1:29 pm - 10:33 pmONT Ontario-BUF Buffalo

6h 04m1 stop Denver Intl

6:30 am - 6:01 pmBUF Buffalo-ONT Ontario

14h 31m2 stops Chicago O'Hare Intl San Francisco

$492United Airlines

Tue, Nov 10 - Wed, Nov 11

1:29 pm - 10:33 pmONT Ontario-BUF Buffalo

6h 04m1 stop Denver Intl

10:30 am - 8:15 pmBUF Buffalo-ONT Ontario

12h 45m2 stops Chicago O'Hare Intl San Francisco

$492United Airlines

Tue, Nov 10 - Wed, Nov 11

Cheap last minute flights

Enter your travel dates to find the best prices.

12:17 pm - 11:52 pmONT Ontario-BUF Buffalo

8h 35m1 stop Atlanta Hartsfield-Jackson

6:05 am - 11:05 amBUF Buffalo-ONT Ontario

8h 00m1 stop Atlanta Hartsfield-Jackson

$492Delta

Thu, Sep 10 - Tue, Sep 15

12:17 pm - 11:52 pmONT Ontario-BUF Buffalo

8h 35m1 stop Atlanta Hartsfield-Jackson

6:05 am - 11:05 amBUF Buffalo-ONT Ontario

8h 00m1 stop Atlanta Hartsfield-Jackson

$492Delta

Fri, Sep 11 - Tue, Sep 15

11:55 pm - 11:20 amONT Ontario-BUF Buffalo

8h 25m1 stop Chicago Midway

5:25 pm - 9:50 pmBUF Buffalo-ONT Ontario

7h 25m1 stop Las Vegas Harry Reid Intl

$747Southwest

Tue, Sep 8 - Fri, Sep 11

1:18 pm - 10:37 pmONT Ontario-BUF Buffalo

6h 19m1 stop Denver Intl

5:58 pm - 10:59 pmBUF Buffalo-ONT Ontario

8h 01m1 stop Chicago O'Hare Intl

$747United Airlines

Thu, Sep 10 - Mon, Sep 14

1:18 pm - 10:37 pmONT Ontario-BUF Buffalo

6h 19m1 stop Denver Intl

8:55 am - 12:50 pmBUF Buffalo-ONT Ontario

6h 55m1 stop Denver Intl

$747United Airlines

Thu, Sep 10 - Sun, Sep 13

6:08 am - 9:07 pmONT Ontario-BUF Buffalo

11h 59m2 stops San Francisco Chicago O'Hare Intl

5:57 pm - 10:59 pmBUF Buffalo-ONT Ontario

8h 02m1 stop Chicago O'Hare Intl

$752United Airlines

Thu, Sep 10 - Sun, Sep 13

7:00 am - 11:12 pmONT Ontario-BUF Buffalo

13h 12m2 stops Chicago O'Hare Intl Newark

8:55 am - 12:50 pmBUF Buffalo-ONT Ontario

6h 55m1 stop Denver Intl

$752United Airlines

Tue, Sep 8 - Fri, Sep 11

7:59 pm - 11:39 amONT Ontario-BUF Buffalo

12h 40m2 stops Seattle/Tacoma Intl Chicago O'Hare Intl

7:59 am - 7:03 pmBUF Buffalo-ONT Ontario

14h 04m2 stops Chicago O'Hare Intl Seattle/Tacoma Intl

$1,017Alaska Airlines

Fri, Sep 11 - Sun, Sep 13

7:59 pm - 11:39 amONT Ontario-BUF Buffalo

12h 40m2 stops Seattle/Tacoma Intl Chicago O'Hare Intl

12:09 pm - 8:24 pmBUF Buffalo-ONT Ontario

11h 15m2 stops Chicago O'Hare Intl Portland

$1,017Alaska Airlines

Thu, Sep 10 - Mon, Sep 14

7:59 pm - 11:39 amONT Ontario-BUF Buffalo

12h 40m2 stops Seattle/Tacoma Intl Chicago O'Hare Intl

7:59 am - 7:03 pmBUF Buffalo-ONT Ontario

14h 04m2 stops Chicago O'Hare Intl Seattle/Tacoma Intl

$1,017Alaska Airlines

Thu, Sep 10 - Sun, Sep 13

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Delta flights from Ontario to Buffalo

Our best Delta deals on Ontario to Buffalo flight tickets

Delta

Jan 8

ONT7:00 amOntario

13h 05m

2 stops

BUF11:05 pmBuffalo

Jan 16

BUF11:20 amBuffalo

14h 23m

2 stops

ONT10:43 pmOntario

$405

Delta

Dec 3

ONT11:08 pmOntario

8h 58m

1 stop

BUF11:06 amBuffalo

Dec 6

BUF12:11 pmBuffalo

9h 28m

1 stop

ONT6:39 pmOntario

$432

Delta

Dec 3

ONT7:00 amOntario

14h 15m

2 stops

BUF12:15 amBuffalo

Dec 6

BUF6:00 amBuffalo

8h 08m

1 stop

ONT11:08 amOntario

$437

United Airlines flights from Ontario to Buffalo

Our best United Airlines deals on Ontario to Buffalo flight tickets

United Airlines

Sep 26

ONT1:22 pmOntario

6h 21m

1 stop

BUF10:43 pmBuffalo

Sep 30

BUF1:48 pmBuffalo

12h 11m

2 stops

ONT10:59 pmOntario

$454

United Airlines

Nov 10

ONT1:29 pmOntario

6h 04m

1 stop

BUF10:33 pmBuffalo

Nov 11

BUF10:35 amBuffalo

13h 16m

2 stops

ONT8:51 pmOntario

$492

United Airlines

Sep 19

ONT7:00 amOntario

13h 12m

2 stops

BUF11:12 pmBuffalo

Sep 26

BUF5:45 pmBuffalo

8h 04m

1 stop

ONT10:49 pmOntario

$497

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioBuffalo

ONT Ontario - BUF Buffalo

ONTBUF

Ontario

Wed 10/21

5:33 pm-12:59 pm

2 stops40h 26m

Buffalo

Sat 10/24

1:44 pm-11:50 pm

2 stops13h 06m

$366

OntarioBuffalo

ONT Ontario - BUF Buffalo

ONTBUF

Ontario

Sat 9/26

8:25 am-10:10 pm

2 stops10h 45m

Buffalo

Tue 9/29

4:47 pm-10:37 pm

1 stop8h 50m

$385

OntarioBuffalo

ONT Ontario - BUF Buffalo

ONTBUF

Ontario

Sat 9/26

8:25 am-10:10 pm

2 stops10h 45m

Buffalo

Tue 9/29

12:56 pm-10:37 pm

2 stops12h 41m

$390

OntarioBuffalo

ONT Ontario - BUF Buffalo

ONTBUF

Ontario

Fri 10/16

11:55 pm-10:30 am

1 stop7h 35m

Buffalo

Mon 10/19

7:30 pm-11:55 pm

1 stop7h 25m

$395

OntarioBuffalo

ONT Ontario - BUF Buffalo

ONTBUF

Ontario

Tue 12/22

9:30 am-10:52 pm

2 stops10h 22m

Buffalo

Tue 12/29

12:30 pm-9:57 pm

2 stops12h 27m

$395

OntarioBuffalo

ONT Ontario - BUF Buffalo

ONTBUF

Ontario

Fri 10/16

9:30 pm-10:30 am

2 stops10h 00m

Buffalo

Mon 10/19

7:30 pm-11:55 pm

1 stop7h 25m

$400

Quickest round-trip

OntarioBuffalo

ONT Ontario - BUF Buffalo

ONTBUF

Ontario

Fri 11/6

11:55 pm-10:25 am

1 stop7h 30m

Buffalo

Tue 11/17

2:00 pm-6:15 pm

1 stop7h 15m

$438

OntarioBuffalo

ONT Ontario - BUF Buffalo

ONTBUF

Ontario

Tue 11/10

1:29 pm-10:33 pm

1 stop6h 04m

Buffalo

Wed 11/11

10:35 am-8:51 pm

2 stops13h 16m

$492

OntarioBuffalo

ONT Ontario - BUF Buffalo

ONTBUF

Ontario

Tue 11/10

1:29 pm-10:33 pm

1 stop6h 04m

Buffalo

Wed 11/11

6:30 am-6:01 pm

2 stops14h 31m

$492

OntarioBuffalo

ONT Ontario - BUF Buffalo

ONTBUF

Ontario

Tue 11/10

1:29 pm-10:33 pm

1 stop6h 04m

Buffalo

Wed 11/11

10:30 am-8:15 pm

2 stops12h 45m

$492

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 typical price of a round-trip flight between Ontario and Buffalo?

Prices are currently low for flights on this route.

Typical prices usually range from $382 to $623.
The lowest price recently found on this route was $366.

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 $378. Flights from Ontario to Buffalo on a Thursday will generally be more expensive and average around $491. 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 $435 per ticket.

Can stopping save me money on Ontario to Buffalo flights?

You could potentially save up to 51% 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	$145
Fastest flight time	6h 19m
Direct flights	None

The best one-way flight to Buffalo from Ontario in the past 72 hours is $145. The best round-trip flight deal from Ontario to Buffalo found on momondo in the last 72 hours is $366.

The fastest flight from Ontario to Buffalo takes 6h 19m

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 19m 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 September 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 59% of all bookings. The subsequent popular airline is United Airlines at 41%.

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 $342	Free Cancellation	Rating 8.0 4,200 reviews		Search Southwest flights
United Airlines	PriceFrom $376	Free Cancellation	Rating 7.4 10,173 reviews		Search United Airlines flights

Batavia

Cheektowaga

Amherst

Williamsville

Tonawanda

Bowmansville

Orchard Park

West Seneca

Grand Island

Lockport

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 $145

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 10/6. 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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Delta flights from Ontario to Buffalo

Our best Delta deals on Ontario to Buffalo flight tickets

United Airlines flights from Ontario to Buffalo

Our best United Airlines deals on Ontario to Buffalo flight tickets

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How to get the cheapest flight ticket from Ontario to Buffalo

What is the typical price of a round-trip flight between Ontario and 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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Fly your favorite airline to Buffalo

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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