ONT - BUF

$152 Find Cheap Flights from Ontario to Buffalo

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ontario to Buffalo departing on 5/26. 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 Buffalo

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

Cheapest round-trip
$367
Typical prices: $364-$257
Delta
Wed 9/23Wed 9/30
ONT - BUF • 1 stop
Cheapest one-way
$152
Typical prices: $268-$359
Frontier
Tue 5/26
ONT - BUF • 2 stops
Top airlines
Cheapest • from $367 (round-trip)
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Ontario and Buffalo. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $286 (round-trip)
Shortest trip • 6h 25m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 100% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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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 Buffalo!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Ontario to Buffalo (ONT-BUF)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to Buffalo 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 Ontario to Buffalo

Wed, Sep 23 - Wed, Sep 30
Delta Logo
12:00 pm - 11:58 pm
ONT
-
BUF
8h 58m
1 stop
Delta Logo
12:09 pm - 6:01 pm
BUF
-
ONT
8h 52m
1 stop
$367Delta
Wed, Sep 23 - Wed, Sep 30
Southwest Logo
11:55 pm - 10:45 am
ONT
-
BUF
7h 50m
1 stop
Southwest Logo
12:00 pm - 7:35 pm
BUF
-
ONT
10h 35m
2 stops
$372Southwest
Wed, Sep 23 - Wed, Sep 30
Southwest Logo
11:55 pm - 12:45 pm
ONT
-
BUF
9h 50m
2 stops
Southwest Logo
12:00 pm - 7:35 pm
BUF
-
ONT
10h 35m
2 stops
$377Southwest
Tue, May 19 - Sun, May 24
Delta Logo
10:00 pm - 11:13 am
ONT
-
BUF
10h 13m
1 stop
Delta Logo
6:15 am - 10:57 am
BUF
-
ONT
7h 42m
1 stop
$392Delta
Wed, Sep 30 - Wed, Oct 21
Delta Logo
12:00 pm - 11:58 pm
ONT
-
BUF
8h 58m
1 stop
Delta Logo
7:00 am - 6:18 pm
BUF
-
ONT
14h 18m
2 stops
$397Delta
Tue, Sep 29 - Tue, Oct 20
Delta Logo
10:59 pm - 1:46 pm
ONT
-
BUF
11h 47m
2 stops
Delta Logo
10:30 am - 10:14 pm
BUF
-
ONT
14h 44m
2 stops
$402Delta
Tue, Sep 29 - Thu, Oct 22
Delta Logo
7:00 am - 6:43 pm
ONT
-
BUF
8h 43m
1 stop
Delta Logo
7:00 am - 6:18 pm
BUF
-
ONT
14h 18m
2 stops
$410Delta
Fri, May 29 - Sat, May 30
American Airlines Logo
10:22 am - 10:36 pm
ONT
-
BUF
9h 14m
1 stop
American Airlines Logo
5:36 am - 12:05 pm
BUF
-
ONT
9h 29m
2 stops
$413American Airlines
Tue, Sep 29 - Thu, Oct 22
Delta Logo
12:00 pm - 11:58 pm
ONT
-
BUF
8h 58m
1 stop
Delta Logo
4:30 pm - 10:14 pm
BUF
-
ONT
8h 44m
1 stop
$422Delta
Fri, May 29 - Sat, May 30
American Airlines Logo
10:22 am - 10:36 pm
ONT
-
BUF
9h 14m
1 stop
American Airlines Logo
7:00 am - 1:28 pm
BUF
-
ONT
9h 28m
1 stop
$425American Airlines
Booking Insights

KAYAK's insights & trends for Ontario to Buffalo flights

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

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

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

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Ontario to Buffalo, 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 Ontario to Buffalo is February, where tickets cost $0 (return) on average. On the other hand, the most expensive months are July and December, where the average cost of round-trip tickets is $576 and $470 respectively.

Good to know

Low seasonSeptember
Cheapest flight$152
Best time to beat the crowds with an average 27% drop in price.
Most popular time to fly with an average 1% increase in price.
Flight from Ontario to Buffalo

When to book flights from Ontario to Buffalo

Are your dates flexible? Find out the best times to travel from Ontario to Buffalo 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 Ontario to Buffalo

  • What is the cheapest flight from Ontario to Buffalo?

    In the last 3 days, the lowest price for a flight from Ontario to Buffalo was $152 for a one-way ticket and $367 for a round-trip.

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

    No, a passport isn't needed to fly from Ontario to Buffalo. However, local authorities might ask for an official ID.

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

    Ontario airport is called Ontario and the only airport in Buffalo is Buffalo.

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

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

  • Which airline alliances offer flights from Ontario to Buffalo?

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

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

    The two airlines most popular with KAYAK users for flights from Ontario to Buffalo are Southwest and United Airlines. With an average price for the route of $456 and an overall rating of 8.0, Southwest is the most popular choice. United Airlines is also a great choice for the route, with an average price of $434 and an overall rating of 7.4.

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

    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 Ontario to Buffalo.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Buffalo from Ontario 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 Ontario to Buffalo?

    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 Buffalo with an airline and back to Ontario with another airline. Booking your flights between Ontario and BUF 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 Ontario to Buffalo?

    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 Buffalo from Ontario 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 Ontario to Buffalo

 
See real verified KAYAK customer reviews for airlines flying from Ontario to Buffalo. 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 Ontario to Buffalo? 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 4314 reviews
7.0Food
8.1Boarding
8.0Comfort
8.6Crew
7.5Entertainment
Airline reviews

The entire experience from boarding to landing was amazing! The crew were very friendly. Will definitely be back.

10.0 Excellentlarry, Apr 2026
LGB - PHX
Read more Southwest reviews

The entire experience from boarding to landing was amazing! The crew were very friendly. Will definitely be back.

Delayed flight, lack of information, boarding process is a mess as is the carryon luggage causing issues when leaving the plane….just a poor experience.

Comfortable. Easy. No problems. Just wish they had gf options for snacks.

The crew was very kind and made going to Hawaii relaxing and fun to look forward to! Thank you Southwest for a pleasant flight!

Terrible. Even though there’s assigned seating now, they are still the slowest boarding airline of anyone.

It was good from LAX to Phoenix, But the connection in Phoenix to Tulsa was not that great. The staff on both flights were great. The choice of free entertainment was ok nothing to brag about. The 45 min delay because of some electrical issue wasn't great from Phoenix to Tulsa. We sat there with hardly any air, The seat I had was between windows so the side of the plane pushed in on you. My being a bigger man it then made the seating area uncomfortable. The seats on the plane had no power to connect to recharge your phone or anything. I would recommend that they should look into a slot or clamp to hold your phone to enjoy while watching the entertainment choices hands-free. Also make it possible to raise the inner seat by the window be able to raise the arm rest up to make more room for larger people to set more comfortably. I would also say other then that stop price gouging the airfare or nickel and diming everything. Not fair for people having to fly for emergencies and be paying for higher prices due to the season or holidays. Your making your money either way and the cost of flying is still going to be the same regardless if there's 100 people or 200 people.

Had a great flight. Delayed takeoff, but comfortable. Snacks were good.

Southwest was greaat! The most expensive but the least upsetting for those we were flying to see.

Boarding was easy. The seats are small and fairly uncomfortable

The problem with the seat assignments is that there were a lot of rows in the front that were empty but my row at the back was full. Just not so pleasant.

Booked through Kayak Business, had a seat in middle and towards back due to booking rate, not comfortable.

Outstanding service, efficient & friendly crew, flight was safe, comfortable & on time

It was a red-eye, but the flight felt surprisingly quick. The seats were very comfortable, and that made resting much easier. I also want to thank the gentleman seated next to me, who graciously moved so my mom could sit beside me. We slept almost the entire way. The cabin crew was respectful in not disturbing us, while also being courteous and professional throughout. Thank you, United.

Boarding was again a "free for all". We were boarding group 4, and almost the entire plane was able to board before us. It's a shame that someone who follows the rules, gets the short end of the stick. Not fair.

It was perfect! I've never flown with United before, but I definitely will in the future

I had a cancelled flight because of technical issues going to my destination, and a delayed flight coming home. All told it wasn’t a total bust.

They delayed the flight from 9:00 to 11:55 At 11:45 they canceled the flight. I paid a premium price for the tickets with poor service

My flight was canceled a few hours before boarding. I was rebooked on Copa airlines and missed an important meeting .

OK, we were delayed and had to de plane and reboard.

Seats are uncomfortable. This has been a trend in the industry for decades. Trying to fit more seats on each plane to increase profits at the expense of the passenger.

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

Information on your arrival and departure airports