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

Delta, United Airlines, and Southwest 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 August 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.

$143 Cheap Flights from Ontario to Buffalo in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Ontario to Buffalo

Round-trip

One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

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

$377United Airlines

Sat, Sep 19 - Wed, Sep 23

10:25 am - 10:59 pmONT Ontario-BUF Buffalo

9h 34m1 stop Dallas/Fort Worth

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

8h 50m1 stop Dallas/Fort Worth

$377American Airlines

Sat, Sep 19 - Wed, Sep 23

12:37 pm - 10:59 pmONT Ontario-BUF Buffalo

7h 22m1 stop Dallas/Fort Worth

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

8h 50m1 stop Dallas/Fort Worth

$377American Airlines

Sat, Sep 26 - Sat, Oct 3

12:43 pm - 10:54 pmONT Ontario-BUF Buffalo

7h 11m1 stop Dallas/Fort Worth

4:48 pm - 9:11 pmBUF Buffalo-ONT Ontario

7h 23m1 stop Dallas/Fort Worth

$377American Airlines

Sat, Oct 24 - Tue, Oct 27

7:30 am - 7:15 pmONT Ontario-BUF Buffalo

8h 45m1 stop Las Vegas Harry Reid Intl

10:45 am - 4:20 pmBUF Buffalo-ONT Ontario

8h 35m1 stop Phoenix Sky Harbor Intl

$428Southwest

Thu, Dec 17 - Mon, Dec 21

11:15 am - 11:45 pmONT Ontario-BUF Buffalo

9h 30m2 stops Las Vegas Harry Reid Intl Baltimore/Washington

10:45 am - 4:20 pmBUF Buffalo-ONT Ontario

8h 35m1 stop Phoenix Sky Harbor Intl

$451Southwest

Thu, Dec 17 - Mon, Dec 21

1:30 pm - 12:15 amONT Ontario-BUF Buffalo

7h 45m1 stop Las Vegas Harry Reid Intl

2:00 pm - 5:45 pmBUF Buffalo-ONT Ontario

6h 45m1 stop Chicago Midway

$457Southwest

Fri, Oct 2 - Tue, Oct 13

7:00 am - 4:56 pmONT Ontario-BUF Buffalo

6h 56m1 stop Chicago O'Hare Intl

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

6h 55m1 stop Denver Intl

$487United Airlines

Sun, Sep 6 - Thu, Sep 10

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

6h 19m1 stop Denver Intl

8:45 am - 12:46 pmBUF Buffalo-ONT Ontario

7h 01m1 stop Denver Intl

$487United Airlines

Sat, Sep 19 - Sat, Sep 26

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

$487United Airlines

Thu, Sep 10 - Sat, Sep 12

Cheap last minute flights

Enter your travel dates to find the best prices.

6:15 am - 9:55 pmONT Ontario-BUF Buffalo

12h 40m2 stops Phoenix Sky Harbor Intl Charlotte Douglas

5:11 am - 3:19 pmBUF Buffalo-ONT Ontario

13h 08m2 stops Chicago O'Hare Intl Phoenix Sky Harbor Intl

$863American Airlines

Tue, Aug 25 - Mon, Aug 31

1:56 pm - 9:28 amONT Ontario-BUF Buffalo

16h 32m2 stops San Francisco Chicago O'Hare Intl

6:55 am - 10:35 pmBUF Buffalo-ONT Ontario

18h 40m1 stop Chicago O'Hare Intl

$886United Airlines

Wed, Aug 26 - Sat, Aug 29

1:56 pm - 4:56 pmONT Ontario-BUF Buffalo

24h 00m2 stops San Francisco Chicago O'Hare Intl

10:30 am - 10:35 pmBUF Buffalo-ONT Ontario

15h 05m1 stop Chicago O'Hare Intl

$886United Airlines

Thu, Aug 27 - Mon, Aug 31

1:56 pm - 9:28 amONT Ontario-BUF Buffalo

16h 32m2 stops San Francisco Chicago O'Hare Intl

10:30 am - 10:35 pmBUF Buffalo-ONT Ontario

15h 05m1 stop Chicago O'Hare Intl

$886United Airlines

Wed, Aug 26 - Tue, Sep 1

1:56 pm - 9:28 amONT Ontario-BUF Buffalo

16h 32m2 stops San Francisco Chicago O'Hare Intl

6:55 am - 10:35 pmBUF Buffalo-ONT Ontario

18h 40m1 stop Chicago O'Hare Intl

$886United Airlines

Thu, Aug 27 - Mon, Aug 31

12:33 pm - 9:39 amONT Ontario-BUF Buffalo

18h 06m2 stops Dallas/Fort Worth Chicago O'Hare Intl

5:49 pm - 9:34 amBUF Buffalo-ONT Ontario

18h 45m2 stops Chicago O'Hare Intl Dallas/Fort Worth

$898American Airlines

Fri, Aug 28 - Sat, Aug 29

12:33 pm - 5:04 pmONT Ontario-BUF Buffalo

25h 31m2 stops Dallas/Fort Worth Chicago O'Hare Intl

10:30 am - 10:59 pmBUF Buffalo-ONT Ontario

15h 29m2 stops Chicago O'Hare Intl Dallas/Fort Worth

$899American Airlines

Tue, Aug 25 - Tue, Sep 1

12:33 pm - 5:04 pmONT Ontario-BUF Buffalo

25h 31m2 stops Dallas/Fort Worth Chicago O'Hare Intl

5:02 am - 6:58 pmBUF Buffalo-ONT Ontario

16h 56m2 stops Chicago O'Hare Intl Dallas/Fort Worth

$899American Airlines

Tue, Aug 25 - Sat, Aug 29

8:30 am - 9:10 pmONT Ontario-BUF Buffalo

9h 40m2 stops Las Vegas Harry Reid Intl Denver Intl

11:45 am - 4:10 pmBUF Buffalo-ONT Ontario

7h 25m1 stop Chicago Midway

$1,082Southwest

Thu, Aug 27 - Thu, Sep 3

8:10 am - 8:50 pmONT Ontario-BUF Buffalo

9h 40m2 stops Denver Intl Chicago Midway

8:35 am - 2:00 pmBUF Buffalo-ONT Ontario

8h 25m2 stops Chicago Midway Denver Intl

$1,087Southwest

Thu, Aug 27 - Thu, Sep 3

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United Airlines flights from Ontario to Buffalo

Our best United Airlines deals on Ontario to Buffalo flight tickets

United Airlines

Sep 19

ONT1:18 pmOntario

6h 19m

1 stop

BUF10:37 pmBuffalo

Sep 23

BUF5:58 pmBuffalo

8h 01m

1 stop

ONT10:59 pmOntario

$377

United Airlines

Sep 6

ONT7:00 amOntario

6h 56m

1 stop

BUF4:56 pmBuffalo

Sep 10

BUF8:55 amBuffalo

6h 55m

1 stop

ONT12:50 pmOntario

$487

United Airlines

Sep 9

ONT6:08 amOntario

11h 59m

2 stops

BUF9:07 pmBuffalo

Sep 12

BUF8:55 amBuffalo

6h 55m

1 stop

ONT12:50 pmOntario

$492

American Airlines flights from Ontario to Buffalo

Our best American Airlines deals on Ontario to Buffalo flight tickets

American Airlines

Sep 19

ONT8:25 amOntario

10h 45m

2 stops

BUF10:10 pmBuffalo

Sep 23

BUF4:47 pmBuffalo

8h 50m

1 stop

ONT10:37 pmOntario

$382

American Airlines

Sep 19

ONT8:25 amOntario

10h 45m

2 stops

BUF10:10 pmBuffalo

Sep 23

BUF5:30 amBuffalo

9h 17m

2 stops

ONT11:47 amOntario

$387

American Airlines

Sep 18

ONT12:37 pmOntario

7h 22m

1 stop

BUF10:59 pmBuffalo

Sep 22

BUF5:30 amBuffalo

9h 36m

2 stops

ONT12:06 pmOntario

$400

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioBuffalo

ONT Ontario - BUF Buffalo

ONTBUF

Ontario

Sat 9/19

1:18 pm-10:37 pm

1 stop6h 19m

Buffalo

Wed 9/23

5:58 pm-10:59 pm

1 stop8h 01m

$377

OntarioBuffalo

ONT Ontario - BUF Buffalo

ONTBUF

Ontario

Sat 9/19

10:25 am-10:59 pm

1 stop9h 34m

Buffalo

Wed 9/23

4:47 pm-10:37 pm

1 stop8h 50m

$377

OntarioBuffalo

ONT Ontario - BUF Buffalo

ONTBUF

Ontario

Sat 9/26

12:37 pm-10:59 pm

1 stop7h 22m

Buffalo

Sat 10/3

4:47 pm-10:37 pm

1 stop8h 50m

$377

OntarioBuffalo

ONT Ontario - BUF Buffalo

ONTBUF

Ontario

Sat 10/24

12:43 pm-10:54 pm

1 stop7h 11m

Buffalo

Tue 10/27

4:48 pm-9:11 pm

1 stop7h 23m

$377

OntarioBuffalo

ONT Ontario - BUF Buffalo

ONTBUF

Ontario

Thu 12/17

7:30 am-7:15 pm

1 stop8h 45m

Buffalo

Mon 12/21

10:45 am-4:20 pm

1 stop8h 35m

$428

OntarioBuffalo

ONT Ontario - BUF Buffalo

ONTBUF

Ontario

Thu 12/17

11:15 am-11:45 pm

2 stops9h 30m

Buffalo

Mon 12/21

10:45 am-4:20 pm

1 stop8h 35m

$451

OntarioBuffalo

ONT Ontario - BUF Buffalo

ONTBUF

Ontario

Fri 10/2

1:30 pm-12:15 am

1 stop7h 45m

Buffalo

Tue 10/13

2:00 pm-5:45 pm

1 stop6h 45m

$457

OntarioBuffalo

ONT Ontario - BUF Buffalo

ONTBUF

Ontario

Sun 9/6

7:00 am-4:56 pm

1 stop6h 56m

Buffalo

Thu 9/10

8:55 am-12:50 pm

1 stop6h 55m

$487

OntarioBuffalo

ONT Ontario - BUF Buffalo

ONTBUF

Ontario

Sat 9/19

1:18 pm-10:37 pm

1 stop6h 19m

Buffalo

Sat 9/26

8:45 am-12:46 pm

1 stop7h 01m

$487

Quickest round-trip

OntarioBuffalo

ONT Ontario - BUF Buffalo

ONTBUF

Ontario

Thu 9/10

1:18 pm-10:37 pm

1 stop6h 19m

Buffalo

Sat 9/12

8:55 am-12:50 pm

1 stop6h 55m

$487

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 $411 to $479.
The lowest price recently found on this route was $377.

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 $488. 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 32% 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	$143
Fastest flight time	6h 04m
Direct flights	None

The best one-way flight to Buffalo from Ontario in the past 72 hours is $143. The best round-trip flight deal from Ontario to Buffalo found on momondo in the last 72 hours is $377.

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 August 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 62% of all bookings. The subsequent popular airline is United Airlines at 38%.

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 $286	Free Cancellation	Rating 8.0 4,212 reviews		Search Southwest flights
United Airlines	PriceFrom $376	Free Cancellation	Rating 7.4 10,115 reviews		Search United Airlines flights

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Orchard Park

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Lockport

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East Aurora

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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 $143

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 9/22. 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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United Airlines flights from Ontario to Buffalo

Our best United Airlines deals on Ontario to Buffalo flight tickets

American Airlines flights from Ontario to Buffalo

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

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