SEA - BUF

$100 Find Cheap Flights from Seattle 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 Seattle to Buffalo departing on 10/5. 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

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 Seattle to Buffalo.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Buffalo.
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Cheap Flights from Seattle to Buffalo (SEA-BUF)

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

Mon, Sep 29 - Fri, Oct 3
Frontier Logo
6:12 am - 4:03 pmSEA-BUF
6h 51m1 stop
Frontier Logo
4:57 pm - 12:30 amBUF-SEA
10h 33m1 stop
$246Frontier
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Tue, Oct 21 - Wed, Oct 29
Delta Logo
6:00 am - 3:16 pmSEA-BUF
6h 16m1 stop
Delta Logo
6:20 am - 10:33 amBUF-SEA
7h 13m1 stop
$259Delta
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Tue, Oct 21 - Wed, Oct 29
United Airlines Logo
7:00 am - 4:53 pmSEA-BUF
6h 53m1 stop
United Airlines Logo
12:15 pm - 9:13 pmBUF-SEA
11h 58m2 stops
$264United Airlines
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Tue, Oct 28 - Fri, Oct 31
American Airlines Logo
12:34 am - 10:42 amSEA-BUF
7h 08m1 stop
American Airlines Logo
6:14 am - 12:37 pmBUF-SEA
9h 23m1 stop
$269American Airlines
Find Deal
Tue, Oct 28 - Fri, Oct 31
American Airlines Logo
12:34 am - 10:42 amSEA-BUF
7h 08m1 stop
American Airlines Logo
6:07 am - 1:46 pmBUF-SEA
10h 39m2 stops
$274American Airlines
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Mon, Oct 27 - Wed, Oct 29
United Airlines Logo
11:59 pm - 2:20 pmSEA-BUF
11h 21m2 stops
United Airlines Logo
2:55 pm - 8:54 pmBUF-SEA
8h 59m1 stop
$292United Airlines
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Wed, Oct 1 - Sat, Oct 4
JetBlue Logo
11:59 pm - 4:29 pmSEA-BUF
13h 30m1 stop
JetBlue Logo
3:55 pm - 10:24 pmBUF-SEA
9h 29m1 stop
$303JetBlue
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Tue, Sep 30 - Sat, Oct 4
JetBlue Logo
11:59 pm - 2:57 pmSEA-BUF
11h 58m1 stop
JetBlue Logo
3:55 pm - 10:24 pmBUF-SEA
9h 29m1 stop
$313JetBlue
Find Deal
Wed, Oct 22 - Wed, Oct 29
Southwest Logo
5:50 am - 8:10 pmSEA-BUF
11h 20m2 stops
Southwest Logo
5:30 am - 12:35 pmBUF-SEA
10h 05m2 stops
$339Southwest
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Tue, Oct 21 - Wed, Oct 29
Southwest Logo
7:10 am - 8:30 pmSEA-BUF
10h 20m2 stops
Southwest Logo
11:10 am - 7:50 pmBUF-SEA
11h 40m2 stops
$349Southwest
Find Deal

Everything you should know

Top airlines
Frontier
Cheapest • from $246 (round-trip)
Southwest
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Video guide: How to find cheap flights to Buffalo
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When to book
3 weeks
in advance
Our data shows that travelers who book at least 3 weeks in advance save around 41% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
September
Cheapest • 21% price drop
July
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest round-trip
$246
Overall average: $379
Frontier
Mon 9/29Fri 10/3
SEA - BUF • 1 stop
Cheapest one-way
$100
Typical prices: $171-360
Frontier
Sun 10/5
SEA - BUF • 1 stop
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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!
Booking Insights

KAYAK's insights & trends for Seattle to Buffalo flights

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

Find cheap flights to Buffalo
Find cheap flights to Buffalo

Planning a trip from Seattle to Buffalo? KAYAK’s data-powered insights will help you find cheap flights. Learn the best time to fly, how early to book your ticket, and other tips to secure great prices.

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

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

When flying from Seattle to Buffalo, you should consider leaving on a Wednesday and avoid Saturdays if you are looking for the best rates. For your return to Seattle, you’ll find the best rates on Tuesdays and the most expensive ones on Sundays.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Seattle 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 Seattle to Buffalo is September, where tickets cost $379 (return) on average. On the other hand, the most expensive months are December and March, where the average cost of round-trip tickets is $623 and $500 respectively.

How far in advance should I book a flight from Seattle to Buffalo?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Seattle to Buffalo, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Seattle to Buffalo, you should book around 3 weeks before departure, which saves you about 41% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 20 weeks before departure.

Good to know

Low seasonFebruary
Cheapest flight$100
Best time to beat the crowds with an average 0% drop in price.
Most popular time to fly and prices are also 0% lower on average.
Flight from Seattle to Buffalo

When to book flights from Seattle to Buffalo

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

  • How can I easily go from Buffalo Niagara International Airport (BUF) to downtown Buffalo?

    If you choose to drive from Buffalo Niagara International Airport (BUF) to downtown Buffalo, you can plan on the journey taking between 15 and 20 minutes. Otherwise, you can take public transport, like bus line 24. The bus will bring you to the city center in 45 to 50 minutes.

  • Will I be able to check a bag for free on my flight from Seattle-Tacoma International Airport (SEA) to Buffalo Niagara International Airport (BUF)?

    If you are flying Economy from Seattle-Tacoma International Airport (SEA) to Buffalo Niagara International Airport (BUF), most airlines will not allow you to check a bag for free. If you choose to pay for a checked bag, airlines like American and Frontier will likely have a weight limit of 50 pounds.

  • What airline lounges are available at Seattle-Tacoma International Airport (SEA)?

    Passengers can choose from a few different airline lounges in Seattle-Tacoma International Airport (SEA). Concourse A has the Club SEA, the United Club, and the Delta Sky Club, while Concourses C and D have the Alaska Lounge. You can also find the Alaska Lounge in the North Satellite Terminal.

  • What environmentally friendly airlines service flights from Seattle-Tacoma International Airport (SEA) to Buffalo Niagara International Airport (BUF)?

    JetBlue has taken many actions to be more environmentally friendly. For example, the airline has made a goal to have net zero carbon emissions by the year 2040. It has also started integrating sustainable aviation fuel into the fuel that it uses for its fleet. In addition, the company has an awareness program to teach tourists about the importance of keeping the oceans clean.

  • What is the cheapest flight from Seattle to Buffalo?

    In the last 3 days, the lowest price for a flight from Seattle to Buffalo was $100 for a one-way ticket and $246 for a round-trip.

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

    No

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

    The Airbus A220-300 is the aircraft model that flies most regularly on the Seattle to Buffalo flight route.

  • Which airline alliances offer flights from Seattle to Buffalo?

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

  • What is the most popular layover when flying to Buffalo from Seattle?

    Chicago is the most popular layover city among KAYAK users traveling from Seattle to Buffalo.

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

    The two airlines most popular with KAYAK users for flights from Seattle to Buffalo are Southwest and Alaska Airlines. With an average price for the route of $468 and an overall rating of 8.0, Southwest is the most popular choice. Alaska Airlines is also a great choice for the route, with an average price of $713 and an overall rating of 8.0.

  • How does KAYAK find such low prices on flights from Seattle 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 Seattle to Buffalo.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Buffalo from Seattle 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 Seattle 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 Seattle with another airline. Booking your flights between Seattle 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 Seattle 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 Seattle up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Seattle to Buffalo

  • Travelers have a few different options for how they can go from downtown Seattle to Seattle-Tacoma International Airport (SEA). If you opt to drive, the trip will take you on average 20 to 25 minutes. If you choose to take public transportation, like the 1-Line tram instead, you will arrive at the airport in around 45 to 50 minutes.
  • Flights from Seattle-Tacoma International Airport (SEA) to Buffalo Niagara International Airport (BUF) will typically require you to have a layover during your journey. If you are flying with JetBlue, you will likely have a layover in Los Angeles. When flying with Frontier, you may have a stop in Denver.
  • One way to save money on your flight from Seattle-Tacoma International Airport (SEA) to Buffalo Niagara International Airport (BUF) is by opting for Basic Economy. JetBlue has a Blue Basic cabin class for this route, while American Airlines has Basic Economy.
  • Not all airlines allow passengers to bring a free carry-on suitcase when flying from Seattle-Tacoma International Airport (SEA) to Buffalo Niagara International Airport (BUF) with Economy. While Frontier Airlines requires you to pay to bring a carry-on suitcase, American Airlines allows you to bring one for free.
  • As flights from Seattle-Tacoma International Airport (SEA) to Buffalo Niagara International Airport (BUF) are rather a long journey, you may want to upgrade to a different cabin class to maximize your comfort. Options like Premium Economy and Business are available for this route.

Reviews of the top 5 airlines serving from Seattle to Buffalo

 
See real verified KAYAK customer reviews for airlines flying from Seattle 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 Seattle 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 4242 reviews
8.1Boarding
8.6Crew
7.0Food
8.0Comfort
7.5Entertainment
Airline reviews

I wish they had movie screens in the headrests. The seats are much improved, more legroom and recently renovated. Bathroom was clean. Staff was outstanding!!

10.0 ExcellentG, Sep 2025LAS - ATL
Read more Southwest reviews

I wish they had movie screens in the headrests. The seats are much improved, more legroom and recently renovated. Bathroom was clean. Staff was outstanding!!

As always, the entire Southwest experience was wonderful, from online booking to flight to baggage retrieval. Very grateful.

The weather could have been better. There was a 40 minute ATC delay in SFO because of marine fog and a micro cell storm delayed landing and take-off at Nashville. The gate was changed 5 minutes from boarding from gate B3 to gate C23 at Nashville airport.

After being assaulted by a flight attendant I was then brushed off as oh well because he long braids didn’t mean to whip me in the eye. I have filed complaints and will see. But like any other issue I’ve had with kayak involved it’s been trash. Last time I’ll be using your app

AC sub par. WiFi not working correctly. Ac sucked. Seats very narrow.

Near 4 hour flight with only 1 service. Had to use call button to request water. Internet and power not working until into flight. Internet would stop working during flight.

Southwest's seats are the least comfortable I have ever sat in.

The cabin was quiet for the redeye flight. The area was clean. The staff was great. The 787 Max was in good condition. Drawbacks were that the seat widths were tight for some passengers. The seat padding was at best average and for a long flight uncomfortable.

Southwest like most American domestic airlines, is a mediocre airline. But it is among the cheapest. Oh well.

My flight was delayed 50 minutes and we were rushed to board to then sit for 15 minutes until the pilot arrived. Unacceptable since we could have waited to board. Also the delayed flight was updated AFTER we boarded to more than the 10 minutes as originally stated.

Delta made it easy, comfortable and timely. The crew was fantastic.

On this flight I felt the food offering was not as complete as on previous flights. The tomato salad was a bit off and there was nothing additional such a bread or butter. The breakfast was only one option, so you either ate what they had or ate nothing. The crew was efficient, but most seemed frustrated throughout the flight. The flight arrived early and was obstacle-free, so I’m overall quite happy, but the shine in the rest of the experience just wasn’t there.

Great flight with Delta! Boarding was quick and easy, the amenities were solid, and the plane was in great shape. The flight attendants had a fun, lively energy while staying professional. All in all, a smooth trip — even managed to catch up on some rest. Thanks, Delta!

De planning was an absolute mess. We were never told that we weren’t at the gate and that we had to go down unstable stairs and then hop on a bus. People were falling, we couldn’t tell who was in charge. Overall terrible communication that ended up leaving a bad impression at the very end of the experience.

For a 69 year old with health problems I had the worse experience, no wheelchair when I entered a lady told me to sit and wait while a gentleman told me I had to walk to the Delta station, which I did. I had a carry on and a bag, and I was traveling with my service dog, which was on his carrier and the lady charged me for my carry on luggage, beside all the waiting cause of the delay, I had to walk to get my luggage cause no wheelchair showed up, I am so disappointed. I will get in touch with the company. I got home at 3:00 am, not good for my health situation.

Did not know my son and I had different seating arrangements. He was fine, but it was disappointing.

Food was surprisingly good but the WiFi was not great

Easy boarding with an extremely kind attendant. Seats were spacious and we had 3 seats for 2 people so we could stretch out. Comfortable air flow and very attentive and hospital attendants. Bathrooms and food were the only negative. Bathrooms were so small you could hardly get in and close the door. I don’t think an obese person would fit or a person with a movement disability. Food was the trending food for flights, nonexistent. We spent $40 getting sandwich and snack at airport for our 6 hour flught.

My flight was canceled after being rescheduled for four days canceling my trip. Kayak and everyone affiliated with it I.e the airlines, and just fly have been excruciating to deal with. My trip to visit family had to be canceled as there was no way to make it. I am furious at all of you.

They delayed our flight because of bad weather in NY which was completely understandable. Then they cancelled our flight and a later flight that evening. The earliest we could fly was the next morning. We ended up buying last minute tickets on another airline and made it home slightly delayed but safely that evening. Delta kept saying it was weather related but if that was the case how did we make it back on another airline? The weather in NY was cloudy but not bad.

The newer screen was super cool and had the option to watch many different shows or movies. Crew was polite and helpful. However again, many children screaming bloody murder and kicking my seat, and parents doing nothing about it as usual.

Flight was good and crew was super polite. However, there were around 5 kids screaming the WHOLE 2 hours. I understand kids have to come but parents need to do something to control their children. They make the experience terrible, especially after finishing 16 hour shifts at the hospital I needed some sleep, which I did not get.

IAD with the archaic people movers is just a place to be avoided.

All of the United employees I interacted with were professional and courteous. The aircraft was clean, the food on the flight was good. No complaints here.

Armrest controller on my seat 35D and nextbooennseat 35E did not work right. Hard to press buttons to recognize and 35D had constantnpressure either upmost down somit was nearly impossible to make selections. .

I flew with my dog and had already purchased my dog’s ticket. Even that morning I had called costumer service to insure that my husband and I had seats together since the website was giving me an error when choosing our seats and the representative mentioned our dog. I showed up early to the airport and when I got to the gate and we started boarding I was help back and told that I was supposed to have a yellow tag and that I should have checked in at the counter for them to give me that tag. I was not aware of this, the representative on the phone did not say anything. Nor did I see it anywhere in the checking process online, so if you travel with a pet and are not checking in luggage, just know that you still have to go to the check in counter when arriving at the airport unless you want to be the last one to board and not have room for your carry on in the overhead bins. Other than that, I had a great experience.

Once we got in the air the pilot made up some of the time of the delay. So that was really nice.

I understand stuff happens, but plane failures are likely due to lack of maintenance. Additionally, air conditioning wasn't working, no snack/drink service, no WiFi. Fortunately, the crew was communicative and light-hearted. United grabbed another plane and we were able to get to our destination.

There was no food available for this red eye... one little waffle cookie for a 6+ hour flight... thank God I was able to sleep some

It is clear that someone knew, and competent, is in charge of food at United Airlines at least for the international flights. I was flying in coach, but the choices of the dinner were excellent. Tasty, and appropriate size. I had the beef, which was a little bit like a shepherds pie, and it was good. Nothing comparable has been served on a United flight in years. It will not be confused with three star food, but it is very good for airline food. Even better was the breakfast choice between a cinnamon roll and a breakfast sandwich. I chose the breakfast sandwich which was absolutely delicious and which I would happily order again at my local Starbucks or Panera. It is clear that someone knew indifferent is in charge of the food and it’s about time.

Dreadful experience. Our flight was delayed more than 8 hours due to a maintenance issue and the assistance from rebooking was poor. I was travelling with a bad knee and needed assistance waited in one place more than 3 hours before someone came with a wheelchair. The woman next to me was a 91 year old great grandmother who had waited more than 4 hours. There were moments of support from the staff but it appeared as they were going against the direction of management. It was apathy, lack of ownership and dismissive responses with small moments of kindness and understanding typically from grey haired, female, veteran staff..

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!

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

Boarding took forever, the plane was cramped and cold, and the seatbelt song came on constantly throughout the red eye flight with a loud pre-recorded message playing each time

Cabin felt crammed Snacks are lame But crew was super efficient getting us out on time despite delay

Everything was great except it became so hot on the plane I couldn’t sleep on my red eye flight. It didn’t really cool down till we started descending.

Flight was empty so had a whole row to myself. Still had to wait to get the bag due to the negligence at Palm Springs departure.

I flew out of Reagan National. My flight was delayed, delayed, delayed, and then canceled ...THREE TIMES over TWO DAYS. Staff were seemingly not empowered to provide information on why the flights were screwed up. A real nightmare.

The only thing is if Wi-Fi is available after you land and taxi to the gate. It takes forever to get to the gate, and having the Wi-Fi continue would be great to bide the time at least 5 minutes before you arrive at the entrance. That is my only comment; otherwise, everything was good.

Seats were new and comfortable. Staff was fine. Missed my connection due to weather -which wasn’t their fault- but got no help at all. Gate staff sent me to customer service, which was and stayed unstaffed. Sign with QR code directed me to call or chat. Chat was useless. Call was returned after an hour. No itinerary offered by Frontier could get me home in less than 30 hours. Rebooked with another airline and got a partial refund that came to about 10 percent of what I paid to get home.

Finally a Frontier on time and efficient. I've had problems before with your airline, but this time everything went fine.

The experience was good. No frills but I got there safe and sound and on time.

Great for the price. No wifi or entertainment, but gate agents and crew were fantastic and we boarded quickly and left on time.

sluggish boarding and arrival procedures, fake nice flight attendants, and lots of delays.

Disaster. They lied every step of the way. We ended up being delayed due to crew and then allegedly abandoned the flight because of a curfew at LGA. No rebooking to LGA at any reasonable time. No hotel. No meal vouchers. Had to sleep in the airport and fly to Newark instead. Will never fly Frontier again.

What I expected, nickeled and dined and a frontier flight attendant loudly complained about her job and lack of communication as she headed to the gate on her cell phone. Not professional.

As every law enforcement agency I could imagine surrounded the plane and we didn’t disembark for 2 hours and then had to stick around for another hour to go get our personal belongings after leaving them behind and being bused away from the plane, it was scary and inconvenient. We were given no information as to why this was happening. Lack of communication with passengers was disappointing.

After boarding and un-boarding twice over 6+hours, the flight was canceled.

Severe turbulence. Captain never came on to reassure passengers after things settled down.

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