ONT - BUF

$126 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 2/11. 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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41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$312
Overall average: $607
Delta
K 2/18T 2/24
ONT - BUF • 1 stop
Cheapest one-way
$126
Typical prices: $335-$488
Frontier
K 2/11
ONT - BUF • 2 stops
Top airlines
Delta
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
May
Cheapest • 23% price drop
April
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

K, veebr 18 - T, veebr 24
Delta Logo
10:20 pm - 11:00 am
ONT
-
BUF
9h 40m
1 stop
Delta Logo
11:52 am - 9:05 pm
BUF
-
ONT
12h 13m
2 stops
$312Delta
K, veebr 18 - T, veebr 24
American Airlines Logo
7:05 pm - 10:53 am
ONT
-
BUF
12h 48m
2 stops
American Airlines Logo
11:23 am - 7:09 pm
BUF
-
ONT
10h 46m
2 stops
$317American Airlines
K, veebr 18 - T, veebr 24
American Airlines Logo
7:05 pm - 10:53 am
ONT
-
BUF
12h 48m
2 stops
American Airlines Logo
5:24 am - 1:49 pm
BUF
-
ONT
11h 25m
2 stops
$318American Airlines
K, veebr 18 - T, veebr 24
American Airlines Logo
10:56 am - 10:41 pm
ONT
-
BUF
8h 45m
1 stop
American Airlines Logo
1:31 pm - 7:45 pm
BUF
-
ONT
9h 14m
1 stop
$353American Airlines
K, veebr 18 - T, veebr 24
American Airlines Logo
10:56 am - 10:41 pm
ONT
-
BUF
8h 45m
1 stop
American Airlines Logo
1:31 pm - 7:45 pm
BUF
-
ONT
9h 14m
1 stop
$375American Airlines
K, juuli 8 - K, juuli 15
United Airlines Logo
6:53 pm - 9:49 am
ONT
-
BUF
11h 56m
2 stops
United Airlines Logo
5:50 pm - 10:26 pm
BUF
-
ONT
7h 36m
1 stop
$382United Airlines
T, veebr 17 - T, märts 3
United Airlines Logo
1:45 pm - 10:59 pm
ONT
-
BUF
6h 14m
1 stop
United Airlines Logo
8:25 am - 12:43 pm
BUF
-
ONT
7h 18m
1 stop
$407United Airlines
N, märts 5 - P, märts 8
United Airlines Logo
1:50 pm - 11:10 pm
ONT
-
BUF
6h 20m
1 stop
United Airlines Logo
8:17 am - 12:48 pm
BUF
-
ONT
7h 31m
1 stop
$411United Airlines
T, veebr 17 - T, märts 3
United Airlines Logo
1:45 pm - 10:59 pm
ONT
-
BUF
6h 14m
1 stop
United Airlines Logo
7:00 am - 5:41 pm
BUF
-
ONT
13h 41m
2 stops
$412United Airlines
N, märts 5 - P, märts 8
United Airlines Logo
6:15 am - 11:10 pm
ONT
-
BUF
13h 55m
2 stops
United Airlines Logo
8:17 am - 12:48 pm
BUF
-
ONT
7h 31m
1 stop
$416United 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.

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 May, where tickets cost $346 (return) on average. On the other hand, the most expensive months are February and June, where the average cost of round-trip tickets is $607 and $531 respectively.

Good to know

Low seasonMarch
Cheapest flight$126
Best time to beat the crowds but there is an average 7% increase in price.
Most popular time to fly and prices are also 7% lower on average.
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 $126 for a one-way ticket and $312 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?

    oneworld, and Star Alliance are the airline alliances operating flights between Ontario and Buffalo, with oneworld being the most commonly used for this route.

  • 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 $434 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 $442 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 3 airlines serving 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 4267 reviews
7.0Food
8.1Boarding
8.0Comfort
7.5Entertainment
8.6Crew
Airline reviews

Great flight but super high price. Glad it was a business trip and not personal

10.0 ExcellentPieter, Jan 2026
LGB - DAL
Read more Southwest reviews

Great flight but super high price. Glad it was a business trip and not personal

3 hour delay. Had to change plans and was still delayed.

We got exit row seats both flights. Everything was running on time

Pretty seamless, just a tad bit late in taking off and landing.

The boarding and seat assignment system no longer works for me, but I know it is being replaced. Otherwise, I am good with the overall experience.

The lead steward kept singing about "San Francisco" and hotel California---more annoying than humorous....needs work. Flight was smooth and on time.

San Diego airport is brand new, spacious, airy and very smooth checkin at SW baggage drop.

Crew could have been friendlier, maybe I'm spoiled by SW crews. In flight wifi was good. Would be nice to have more food offerings on a 4 plus hour flight

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.

Sacrament staff are always polite and helpful. Airport is easy to maneuver and boarding is straightforward.

It was a pretty standard flight... until the almost hour and a half spent on the taxi way. I get that the weather has been poor but the delay had nothing to do with the weather and more to do with a plane with several issues tying up the gate. I get that that happens from time to time but this has been EVERY flight I've been on for the past 5 years and I fly 3 to 5 times a year. This isn't just United... it's American, it's Delta. It's an issue with the entire industry. I work for UPS and packages on a cargo plane get better service than people do these days. Anymore I HATE flying.

The flight crew where really good. Better then the crew from BNE to SFO

left on time, reasonable boarding process arrived early luggage came out quickly

I’m so sorry, I can’t remember her name, I believe it was Dimpti. She was stellar, also a mature Asian flight attendant, lots of flowers in her hair, just as amazing! But literally the crew was AWESOME . Only downside is there weren’t any charging outlets. Maybe I needed to ask a flight attendant , but it would’ve been nice to have one easily accessible.

I boarded flight UA#1318 at Sacramento International Airport going back to Houston TX. The flight was scheduled at 5:10am. I was able to check in virtually using the United Airlines app. When I entered the airport, there was no one outside assisting with checked bags as it was for Delta Airlines. Immediately upon entering, there was a LONG, EXTREMELY LONG line to the kiosks to get boarding passes. I stand in line to get boarding passes then had to move to ANOTHER EXTREMELY LONG line to get my bags checked in. While standing in this line, we noticed an agent taking customers to 3 at a time to her station to check their bags in. Lucky for me, she called me back, checked my bags for me and I was on my way. I then encountered another long line at the TSA check and to avoid I ending up having to sign up for CLEAR to bypass it. So glad, I did.,...Both of my flights were great with no issues, butthe check in progress at Bush Airport was so much smoother. Check-in at SMF airport needs to be anaylzed and corrected. Do better United, I know you can....thanks

Pushed back only to get deplaned due to a tire damaged by ground crew. They did at least go pretty fast. The bathrooms should be banned under the Geneva convention. No room to even sit straight on the toilet. The under-seat entertainment units block what little leg room there is.

United airlines has the best customer experience from booking to arrival. I always fly United airlines. The mileage program is excellent

Older aircraft, no meal, only food was for purchase. Not impressed United.

Not pleasant trip cross country when the entertainment and WiFi system not working. No entertainment for entirety of route. Staff was rather nonchalant in that they dismissed the problem due to age of plane. It would have been nice to know this up front so I could have come prepared to read or download movies before boarding Coincidentally or not, there was a similar issue with the entertainment system on my previous flight I took on my fist leg of the trip. There are no seat TVs, so you must rely on the app when it works. United can do better. Also, what use it it to pay for boarding group 2 when half of the passengers are in the same line as you?

Premium Plus is a really good idea for longer flights

Long delays, lack of information about the status of the flight. The flight was delayed 4 times.

It was good. But the gate team made me check my carry on when there was plenty of space for my luggage on the plane. Otherwise our trip was fine.

Bags took over and hour to come out. Delays due to wind caused rebooking.

The flight was on time and arrived early. The crew were friendly and helpful.

Gate was overcrowded. Gate agents performed very well. Flight crew was top notch! Efficient & professional & courteous. Both meals not thermalized well. Dinner main dish was actually cold in the center. Almost inedible. Breakfast sandwich was lukewarm.

RIC Staff was not enough. Elderly passengers had to wait 30 minutes to deplane, so we could board and still had to walk as no chairs were provided. And, passenger in front of my seat assignment rammed seat against my legs entire flight time. Was mildly bruised and left thigh still sore.

Flight was cancelled 3 hrs AFTER etd. Thetefore Missed connection from JFK to New Zealand . No accommodation provided… This cost ne aporox 1000 USD in extra expenses and turned whst should have been a 24 hr trip ftom Boston - New Zealand into a VERY expensive , late 70+ hr nightmare … Complete nonsense!!!

Overall fine, but the delay was annoying and the reasons for the delay were not communicated. The crew on board were phenomenal!

The chair cushions may need an upgrade. I have been noticing they are so worn out, thin so you’d sit in a dip 😄. Other than that, all was an enjoyable trip. Thanks AA!

Whenever a passenger purchase a ticket his advantage number should automatically to his information. It's not everyone remember the number. You request for your number and American airline agent say they will email it....and they never email anything and you loose your mileage just because you don't remember your number. It should automatically go your information and associate with your email account at all times

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

Information on your arrival and departure airports