STL - BUF

$124 Find Cheap Flights from St. Louis 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 St. Louis to Buffalo departing on 2/15. 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 St. Louis 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 St. Louis to Buffalo, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$225
Overall average: $402
Frontier
Wed 2/11Sun 2/15
STL - BUF • 1 stop
Cheapest one-way
$124
Frontier
Sun 2/15
STL - BUF • 1 stop
Top airlines
Frontier
Cheapest • from $225 (round-trip)
Southwest
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
5 weeks
in advance
Our data shows that travelers who book at least 5 weeks in advance save around 48% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
November
Cheapest • 13% price drop
September
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
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 St. Louis to Buffalo (STL-BUF)

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

Wed, Feb 11 - Sun, Feb 15
Frontier Logo
8:17 pm - 12:54 pm
STL
-
BUF
15h 37m
1 stop
Frontier Logo
2:19 pm - 6:51 am
BUF
-
STL
17h 32m
1 stop
$225Frontier
Fri, Feb 20 - Sun, Feb 22
Frontier Logo
8:20 pm - 11:00 am
STL
-
BUF
13h 40m
1 stop
Frontier Logo
2:19 pm - 6:51 am
BUF
-
STL
17h 32m
1 stop
$260Frontier
Wed, Feb 11 - Sun, Feb 15
Frontier Logo
8:17 pm - 11:34 am
STL
-
BUF
14h 17m
2 stops
Frontier Logo
2:19 pm - 6:51 am
BUF
-
STL
17h 32m
1 stop
$268Frontier
Thu, Feb 12 - Sun, Feb 15
Frontier Logo
3:49 pm - 9:57 am
STL
-
BUF
17h 08m
1 stop
Frontier Logo
2:19 pm - 6:51 am
BUF
-
STL
17h 32m
1 stop
$287Frontier
Wed, Mar 11 - Mon, Mar 16
Delta Logo
5:15 pm - 11:13 pm
STL
-
BUF
4h 58m
1 stop
Delta Logo
7:38 pm - 11:58 pm
BUF
-
STL
5h 20m
1 stop
$292Delta
Thu, Mar 12 - Mon, Mar 16
American Airlines Logo
3:33 pm - 10:50 pm
STL
-
BUF
6h 17m
1 stop
American Airlines Logo
4:04 pm - 8:16 pm
BUF
-
STL
5h 12m
1 stop
$307American Airlines
Thu, May 14 - Sat, May 16
Southwest Logo
5:40 am - 10:15 am
STL
-
BUF
3h 35m
1 stop
Southwest Logo
2:00 pm - 7:10 pm
BUF
-
STL
6h 10m
2 stops
$312Southwest
Tue, Jul 21 - Tue, Jul 28
Delta Logo
3:42 pm - 11:58 pm
STL
-
BUF
7h 16m
1 stop
Delta Logo
7:35 pm - 11:01 pm
BUF
-
STL
4h 26m
1 stop
$317Delta
Wed, Mar 11 - Fri, Mar 13
United Airlines Logo
8:17 am - 1:17 pm
STL
-
BUF
4h 00m
1 stop
United Airlines Logo
5:29 pm - 9:07 pm
BUF
-
STL
4h 38m
1 stop
$322United Airlines
Wed, Mar 11 - Thu, Mar 12
Southwest Logo
7:30 am - 4:00 pm
STL
-
BUF
7h 30m
2 stops
Southwest Logo
5:55 pm - 11:05 pm
BUF
-
STL
6h 10m
1 stop
$327Southwest
Booking Insights

KAYAK's insights & trends for St. Louis to Buffalo flights

Get data-powered insights and trends into flights from St. Louis 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 St. Louis to Buffalo?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from St. Louis 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 St. Louis to Buffalo is November, where tickets cost $331 (return) on average. On the other hand, the most expensive months are January and April, where the average cost of round-trip tickets is $511 and $454 respectively.

How far in advance should I book a flight from St. Louis 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 St. Louis 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 St. Louis to Buffalo, you should book around 5 weeks before departure, which saves you about 48% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 24 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$124
Best time to beat the crowds but there is an average 33% increase in price.
Most popular time to fly and prices are also 10% lower on average.
Flight from St. Louis to Buffalo

When to book flights from St. Louis to Buffalo

Are your dates flexible? Find out the best times to travel from St. Louis 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 St. Louis to Buffalo

  • What is the cheapest flight from St. Louis to Buffalo?

    In the last 3 days, the lowest price for a flight from St. Louis to Buffalo was $124 for a one-way ticket and $225 for a round-trip.

  • Do I need a passport to fly between St. Louis and Buffalo?

    A passport is not required to fly from St. Louis to Buffalo.

  • Which airports will I be using when flying from St. Louis to Buffalo?

    When flying out of St. Louis you will be using Lambert-St Louis. You will be landing at Buffalo, also known as Buffalo.

  • Which aircraft models fly most regularly from St. Louis to Buffalo?

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

  • Which airline alliances offer flights from St. Louis to Buffalo?

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

  • Which is the best airline for flights from St. Louis to Buffalo, Southwest or Delta?

    The two airlines most popular with KAYAK users for flights from St. Louis to Buffalo are Southwest and Delta. With an average price for the route of $416 and an overall rating of 8.0, Southwest is the most popular choice. Delta is also a great choice for the route, with an average price of $312 and an overall rating of 7.9.

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

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

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

Reviews of the top 4 airlines serving from St. Louis to Buffalo

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

All good except once again bags took an hour at Midway Airport Happens all the time. Ridiculous

10.0 ExcellentAnonymous, Jan 2026
PHX - MDW
Read more Southwest reviews

All good except once again bags took an hour at Midway Airport Happens all the time. Ridiculous

Everything went smoothly and we even arrived a little bit early.

Great vacation. Can't wait till next year for another one.

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

On time. Friendly staff. Took to long to pre bord all the specialty groups. Cramped small plane

The seats were comfortable, and the boarding process was pretty smooth.

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

The staff was very friendly, professional, and courteous. The overall flight was a great experience.

The crew canceled the complementary snack and drink in anticipation of turbulence that never materialized. I was counting on the drink (water) to take the the doses of medication - prescribed for my heart condition - that were due during the flight. Since no snack or meal was served on this flight, I cannot rate the food quality. Otherwise, this flight was excellent.

Departure was delayed more than 1/2 hour while we waited for luggage (only) transfer from another flight/plane. Once approved for takeoff, the flight was excellent.

Air travel sucks. It continues to be awful for all airlines. No shame on delta alone.

Delta canceled our flight and we had to scramble to find another airline to get home. Phoenix is not a delta hub so they didn’t have another plane. It would have been a red eye though Salt Lake City. Getting in at 5am. No bueno.

Flight delays both to Detroits and return flight . The flight to Detroit was associated with mechanical difficulty

The food is terrible. The staff is wonderful. Comfort is good.

I fly Delta all the time, have Platinum Medallion status. But this route seems to have major problems with delays and seems to never leave on time! Have only taken it twice in the last two weeks, and each time it had delays of more than 1 hour... very disappointed!!!!

Staff was exceptional! Everyone was kind, professional and friendly making the trip very pleasant. Thank you!

The flight used a B767 with a very old interior from before 2014. The entertainment system did not work at all during the flight despite attempts to reset the system. It was like they flew this route just to be competitive.

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!

In overall it was a good experience, the only down point was that the entertainment screen was working properly.

HORRIBLE, my initial flight was cancelled, they made me pay $200 extra dollars and that got cancelled as well! After 6 cancellations I decided to get a refund because I needed to get home to my babies. Out of $1000+ dollars they offered me only $40 in refund! Totally unacceptable! The flight that they cancelled I was able to fly it on another airline. I had to spend $400 on one way tickets just to get home! I’m still getting the runaround.

First class ticket gets you a choice of chips or nuts. . Just like economy Southwest. Also no screen in the seats. This is first class???!

Seated dude next to me even though lots of empty rows. But main thing was we sat on the tarmac after landing for 30 minutes because of, in the words of the dude who sat next to me, “operational incompetence”. We got changing directions about where to pick up gate checked bags. Pilot and flight attendant were awesome though.

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.

Flight arrived 30 min early and bag was waiting at the baggage pickup. United Club HNL was one of the nicest in the system

Unfortunately weather delayed our flight waiting for our plane to arrive and due to a little snow time was needed to deice the plane so departure was very delayed and I missed the connecting flight

Very good. Because of the delays with my previous flight, I missed my connection, but I was able to book another flight through the United app easily.

I wish there were outlets to charge my iPhone. The crew was great; we had a female pilot who was great with explaining what was happening and delays,

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

Trip delayed for 2 hours because of rain. We boarded and have to get down the flight and reboard again.

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

No enough space plus only allowing one laggage instead of two like other airlines.

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.

Qatar airways ,boarding arrangements at Hamid international airport could been better

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

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!

Everything you need to know for your flight from St. Louis to Buffalo

Information on your arrival and departure airports