BUF - ONT

$139 Find Cheap Flights from Buffalo to Ontario

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Buffalo to Ontario departing on 12/14. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Ontario

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Buffalo to Ontario, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Buffalo to Ontario, as well as popular online travel agencies
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Flight Deals

Cheap Flights from Buffalo to Ontario (BUF-ONT)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Buffalo to Ontario that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Buffalo to Ontario

Tue, Dec 2 - Sat, Dec 6
American Airlines Logo
6:12 am - 4:01 pmBUF-ONT
12h 49m2 stops
American Airlines Logo
10:34 pm - 11:03 amONT-BUF
9h 29m1 stop
$312American Airlines
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Tue, Dec 2 - Sat, Dec 6
American Airlines Logo
6:12 am - 4:01 pmBUF-ONT
12h 49m2 stops
American Airlines Logo
6:00 am - 9:40 pmONT-BUF
12h 40m2 stops
$317American Airlines
Find Deal
Tue, Dec 2 - Sat, Dec 6
American Airlines Logo
6:12 am - 2:04 pmBUF-ONT
10h 52m1 stop
American Airlines Logo
10:34 pm - 11:03 amONT-BUF
9h 29m1 stop
$342American Airlines
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Tue, Mar 10 - Tue, Mar 17
Southwest Logo
4:15 pm - 9:50 pmBUF-ONT
8h 35m1 stop
Southwest Logo
2:15 pm - 12:15 amONT-BUF
7h 00m1 stop
$377Southwest
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Tue, Mar 10 - Tue, Mar 17
Southwest Logo
6:00 am - 1:05 pmBUF-ONT
10h 05m2 stops
Southwest Logo
11:55 pm - 10:10 amONT-BUF
7h 15m1 stop
$382Southwest
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Tue, Mar 10 - Tue, Mar 17
Southwest Logo
6:50 am - 1:40 pmBUF-ONT
9h 50m2 stops
Southwest Logo
9:45 pm - 10:10 amONT-BUF
9h 25m2 stops
$387Southwest
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Sun, Mar 1 - Thu, Mar 5
Delta Logo
6:00 am - 11:38 amBUF-ONT
8h 38m1 stop
Delta Logo
10:30 pm - 11:16 amONT-BUF
9h 46m1 stop
$437Delta
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Fri, Feb 20 - Mon, Feb 23
United Airlines Logo
8:25 am - 12:43 pmBUF-ONT
7h 18m1 stop
United Airlines Logo
1:45 pm - 10:59 pmONT-BUF
6h 14m1 stop
$444United Airlines
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Wed, Dec 24 - Sat, Jan 3
United Airlines Logo
5:35 pm - 10:25 pmBUF-ONT
7h 50m1 stop
United Airlines Logo
5:05 am - 8:54 pmONT-BUF
12h 49m2 stops
$478United Airlines
Find Deal
Sun, Mar 1 - Thu, Mar 5
Delta Logo
6:00 am - 11:38 amBUF-ONT
8h 38m1 stop
Delta Logo
10:30 pm - 11:16 amONT-BUF
9h 46m1 stop
$498Delta
Find Deal

Everything you should know

Top airlines
American Airlines
Cheapest • from $312 (round-trip)
Southwest
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
October
Cheapest • 35% price drop
April
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest round-trip
$312
Typical prices: $591-$858
American Airlines
Tue 12/2Sat 12/6
BUF - ONT • 2 stops
Cheapest one-way
$139
Typical prices: $251-$345
Frontier
Sun 12/14
BUF - ONT • 2 stops
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Ontario!
Booking Insights

KAYAK's insights & trends for Buffalo to Ontario flights

Get data-powered insights and trends into flights from Buffalo to Ontario to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Buffalo to Ontario?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Buffalo to Ontario departing in December.

What’s the cheapest day of the week to fly from Buffalo to Ontario?

The average price of all round-trip flights from Buffalo to Ontario clicked on KAYAK for each day over the last 12 months.

If your flying dates are flexible, you should consider flying to Ontario on a Saturday, as we generally find the cheapest rates on that day for this route. On the other hand, Sunday is the most expensive day to fly from Buffalo to Ontario. For your return ticket, we recommend flying on a Monday and avoiding Sundays for the best deals.

What is the cheapest month to fly from Buffalo to Ontario?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Buffalo to Ontario, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Buffalo to Ontario is October, where tickets cost $306 (return) on average. On the other hand, the most expensive months are December and June, where the average cost of round-trip tickets is $746 and $571 respectively.

Good to know

Low seasonJuly
Cheapest flight$139
Best time to beat the crowds with an average 11% drop in price.
Most popular time to fly with an average 7% increase in price.
Flight from Buffalo to Ontario

When to book flights from Buffalo to Ontario

Are your dates flexible? Find out the best times to travel from Buffalo to Ontario based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Buffalo to Ontario

  • What is the cheapest flight from Buffalo to Ontario?

    In the last 3 days, the lowest price for a flight from Buffalo to Ontario was $139 for a one-way ticket and $312 for a round-trip.

  • Do I need a passport to fly between Buffalo and Ontario?

    A passport is not required to fly from Buffalo to Ontario.

  • Which airports will I be using when flying from Buffalo to Ontario?

    When flying out of Buffalo you will be using Buffalo. You will be landing at Ontario, also known as Ontario.

  • Which aircraft models fly most regularly from Buffalo to Ontario?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Buffalo to Ontario?

    oneworld is the only airline alliance operating flights between Buffalo and Ontario.

  • Which is the best airline for flights from Buffalo to Ontario, Southwest or American Airlines?

    The two airlines most popular with KAYAK users for flights from Buffalo to Ontario are Southwest and American Airlines. With an average price for the route of $471 and an overall rating of 8.0, Southwest is the most popular choice. American Airlines is also a great choice for the route, with an average price of $366 and an overall rating of 7.2.

  • How does KAYAK find such low prices on flights from Buffalo to Ontario?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Buffalo to Ontario.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Buffalo to Ontario?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ontario from Buffalo is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Buffalo to Ontario?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Ontario with an airline and back to Buffalo with another airline. Booking your flights between Buffalo and ONT can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Buffalo to Ontario?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Ontario from Buffalo up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airlines flying from Buffalo to Ontario

 
See real verified KAYAK customer reviews for airlines flying from Buffalo to Ontario. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Buffalo to Ontario? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
SouthwestOverall score based on 4241 reviews
8.1Boarding
8.6Crew
7.0Food
8.0Comfort
7.5Entertainment
Airline reviews

Ever since Southwest starting charging for bags, passengers don't want to pay to check their bags, so the gate agents have to beg people to check their roller bags now because there's "not enough space". This was a terrible business move by Southwest.

8.0 ExcellentGreg, Oct 2025OAK - BUR
Read more Southwest reviews

Ever since Southwest starting charging for bags, passengers don't want to pay to check their bags, so the gate agents have to beg people to check their roller bags now because there's "not enough space". This was a terrible business move by Southwest.

Delays delays delays. Late taking off, late landing, wait for a gate, etc.

Connecting flight is on time and boarding was a breeze!

Very smooth checking in our luggage with a super pleasant SW agent. I enjoyed a fun entertaining movie.

First time traveling on Southwest since bag fees were implemented. Usual good service. Just more expensive now.

It was a perfect flight in all aspects! Both legs!

Boarding process, crew were good. But the seats were so uncomfortable that was all I could focus on. I literally had to sit forward so that all 3 of us could fit in row. I will try to avoid Southwest in the future for any flights over 60 minutes.

Great flight, 47 passengers on a 180 seat plane. Stewardess was pleasant and cheerful.

Great experience flying Southwest. The crew was really kind and helpful, and very friendly with our toddler.

Plane late from DC to Austin 30 minutes. Crew made up much of the time enroute to San Diego.

We are too tired and frustrated to comment politely at this point

The flight crew was rude. We were in first class and no one even offered water until an hour after we were in the air. Horrible experience

Great. Quick and quiet and east. The breakfast choices were a welcome surprise!

The stewardess hit me with the food kart twice on the head and didn't say I'm sorry once. The same stewardess gave me a warm Apple Juice with No ice. The Flight was delayed for Departure 6 times, starting from 2:36pm, finally taking off 7:50pm. I was late picking up my child from the sitter by 3 hours.

Did not get the seat I selected and paid for.

My flight was delayed for several hours. Sitting at gate 16 for several hours, I got a text from Kayak the gate changed to 9 before it was announced. Very bad communication at each gate from American Airlines employees. I received 10 notifications of delay from Kayak. My vacation started off horrible! I will write to American Airlines corporate office also.

Delayed flight that lead to a missed connection and a 5-hour trip became a 12-hour flight 🙄

There is no room, no gluten free options, or any free internet/entertainment. You have to bring your own tablet or smartphone because there are no screens.

Amazing food, great staff, with one noticable detail missing ...but no seat entertainment in any of aircraft ...I am not a fan

Boarding gate in Honolulu was staffed with a great clerk with a soothing voice despite the flight delay of over an hour. Flight attendants in the plane were all grumpy, not pleasant looking bunch. Their sour attitude showed throughout the flight. Inly able to get a select few movies started. Most of the movie links in the “free entertainment” did not work.

Everything you need to know for your flight from Buffalo to Ontario

Information on your arrival and departure airports

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