STL - BUF

$109 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 11/19. 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 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
$247
Overall average: $352
Delta
Thu 11/27Tue 12/2
STL - BUF • 1 stop
Cheapest one-way
$109
Typical prices: $180-$303
Frontier
Wed 11/19
STL - BUF • 1 stop
Top airlines
Delta
Cheapest • from $247 (round-trip)
Southwest
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
4 weeks
in advance
Our data shows that travelers who book at least 4 weeks in advance save around 47% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
July
Cheapest • 14% price drop
November
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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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

Thu, Nov 27 - Tue, Dec 2
Delta Logo
10:45 am - 5:15 pmSTL-BUF
5h 30m1 stop
Delta Logo
12:10 pm - 4:06 pmBUF-STL
4h 56m1 stop
$247Delta
Find Deal
Sun, Nov 2 - Thu, Nov 6
Frontier Logo
2:12 pm - 11:44 amSTL-BUF
20h 32m1 stop
Frontier Logo
1:04 pm - 4:01 pmBUF-STL
27h 57m2 stops
$250Frontier
Find Deal
Wed, Dec 17 - Thu, Jan 1
Southwest Logo
6:05 am - 2:20 pmSTL-BUF
7h 15m1 stop
Southwest Logo
1:50 pm - 10:10 pmBUF-STL
9h 20m1 stop
$252Southwest
Find Deal
Wed, Dec 3 - Wed, Dec 10
American Airlines Logo
6:00 am - 11:59 amSTL-BUF
4h 59m1 stop
American Airlines Logo
5:24 pm - 9:47 pmBUF-STL
5h 23m1 stop
$257American Airlines
Find Deal
Wed, Dec 17 - Thu, Jan 1
Southwest Logo
5:10 am - 2:20 pmSTL-BUF
8h 10m2 stops
Southwest Logo
1:50 pm - 10:10 pmBUF-STL
9h 20m1 stop
$258Southwest
Find Deal
Thu, Dec 11 - Sun, Dec 14
Multiple Airlines Logo
12:04 pm - 10:45 amSTL-BUF
21h 41m1 stop
Multiple Airlines Logo
3:18 pm - 9:52 amBUF-STL
19h 34m2 stops
$263Multiple Airlines
Find Deal
Thu, Nov 27 - Tue, Dec 2
United Airlines Logo
8:00 am - 6:39 pmSTL-BUF
9h 39m2 stops
United Airlines Logo
6:00 am - 2:25 pmBUF-STL
9h 25m2 stops
$278United Airlines
Find Deal
Thu, Nov 27 - Tue, Dec 2
United Airlines Logo
1:10 pm - 6:39 pmSTL-BUF
4h 29m1 stop
United Airlines Logo
6:00 am - 2:25 pmBUF-STL
9h 25m2 stops
$282United Airlines
Find Deal
Fri, Jan 16 - Sun, Jan 18
American Airlines Logo
6:52 am - 12:08 pmSTL-BUF
4h 16m1 stop
American Airlines Logo
8:00 am - 3:04 pmBUF-STL
8h 04m2 stops
$307American Airlines
Find Deal
Fri, Nov 7 - Sun, Nov 9
Multiple Airlines Logo
4:56 pm - 10:08 amSTL-BUF
16h 12m2 stops
Multiple Airlines Logo
6:59 pm - 9:40 amBUF-STL
15h 41m1 stop
$334Multiple Airlines
Find Deal
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’s the cheapest day of the week to fly from St. Louis to Buffalo?

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

If you are looking for a flight deal from St. Louis to Buffalo, look for departures on Wednesdays and avoid leaving on a Saturday, as it's usually the priciest day. When flying back from Buffalo, Wednesday is the cheapest day to fly and Monday is the most expensive.

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 July, where tickets cost $346 (return) on average. On the other hand, the most expensive months are January and December, where the average cost of round-trip tickets is $637 and $514 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 4 weeks before departure, which saves you about 47% 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$109
Best time to beat the crowds but there is an average 57% increase in price.
Most popular time to fly and prices are also 14% 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 $109 for a one-way ticket and $247 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, oneworld, and SkyTeam 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 $404 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 $352 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 4239 reviews
7.0Food
8.1Boarding
7.5Entertainment
8.6Crew
8.0Comfort
Airline reviews

Great flight. Outstanding Service. Southwest was able to put us on a direct flight to Denver when the connection could have been affected by a later arrival to Baltimore. The direct flight was less expensive that the flight with the connection in Baltimore.

10.0 ExcellentAnonymous, Oct 2025BOS - BWI
Read more Southwest reviews

Great flight. Outstanding Service. Southwest was able to put us on a direct flight to Denver when the connection could have been affected by a later arrival to Baltimore. The direct flight was less expensive that the flight with the connection in Baltimore.

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

Boarded on time but once we were ready for take off, the crew determined that, although every seat was taken, somehow someone was on the wrong flight. Delay, delay delay, announcements and ended up with one person checking EVERY ID against their passenger Manifest only to figure out it was a "clerical error." We departed 54 minutes late causing me to run in the St. Louis Airport to make my connection and lose the priority boarding spot I had paid for. Unnecessary delay.

I was re-booked onto another flight because my original flight was delayed and I would have missed my connector. I ended up in the “C” group after paying extra to be in the “A “ group on the original flight. At least if you’re going to re-book people, re-book them into the same group.

Flight was delayed due to plane not passing inspection And one of the crew had to time out and we had to wait for another one A 3 hour delay

mandatory demand customer to check their carry on because not enough people check bags.

Connecting flight is on time and boarding was a breeze!

Excellent. Would encourage Southwest to keep current boarding procedures with free style seating. Makes for a fantastic experience

As always, the entire Southwest experience was perfect. Purchasing the tickets on the Southwest web site was effortless, departure and arrival gates were spotless and comfortable, plane was clean and comfortable, crew was excellent and flight was on time. Wheelchair service in Las Vegas at departure was somewhat chaotic and disjointed, but I am not sure if that was Southwest problem, airport problem or combination.

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!!

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!

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.

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.

I like for how they process during check in. It was very smoothly.

The flight attendants were great, I joked with one I can’t remember her name, a blond, really sweet. I thought it was run well very professional. This was great i survived Spirit, I know for which I speak.

During booking, I kept trying submitting my payment from the Mexican website and it didn't work. After I had the idea to change it to the Canadian website, it worked but I had to be charged the equivalent of 50 CAD more. I received the clear instruction that I would only be able to check-in at the airport and that it was impossible to select a seat 24 hours before departure, that I had to pay 144 CAD to do so, although not only was I able to check-in 24 hours before departure, but I could have selected my seats for free then. All in all, I almost threw $200 out the window due to misleading information. Besides, the app kept crashing, the information to get to the gate on the app was inaccurate, my gate was switched and I was only informed once in the air (luckily I had noticed the departure pannel), I was not addressed in my language beforehand and even if I tried I was immediately answered in English (which meant the crew understood but didn't want to answer accordingly), there was only one snack & beverage service on my medium haul flight and no beverage service on my short haul flight. To be fair, the planes were comfortable, the crew apart from the language issue was helpful, dynamic and engaging, the plane was clean and the directions were clear and direct. United has a lot of potential to be one of my favourite airlines, but the devil is in the details and a lot of them missed the target.

Flight was timely, relatively comfortable, with decent entertainment and food served. Only problem encountered was with the free messaging which I highly appreciate, but it did not work from iphone to non-iphones.

Better WiFi. I cannot understand that in 2025, United is so behind on a technology that is now a necessity and still painfully unreliable, slow and keeps disconnecting.

The entertainment available didn’t work for anyone on the flight. Long 6 hr flight with no entertainment option and the staff didn’t know until an hour into the flight when we made sure they knew about it. They had no way to fix it.

Crew seemed a bit cranky. No seatback screens. But boarding was efficient and on time and we arrived early.

The worst landing I have ever had on a domestic flight. Thought we would lose the landing gear on landing in Newark. Then we spent 40 minutes trying to position the plane in the right place to be able to get the jet way to the plane. The plane arrived stopped. The announcer was that we were there. Everybody got up, then we were told to sit back down because they had to have us towed to a different position. We got towed and then everyone stood up and they told us we were in the wrong position to sit back down again, and then we got towed to a different position This did not happen immediately. It was 30 minutes while we wandered around a small section of the tarmac in Newark close to the gate, but apparently not close enough. Horrifying experience The CAB should be investigating that flight

Boarding was organized. Plane seats comfortable and service was attentive. Food options were good.

This was a very average flight. The seat was out of alignment so more uncomfortable than usual. The cabin felt not well maintained. But I safely got where I needed to go.

Trip was great. A wild landing in Ottawa with the wind and rain, but the pilot did a great job. Always love flying United.👍

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

Two flight changes before the scheduled flight. On the day of the flight, the flight was delayed, which caused the connecting flight to be missed. Then, I was directed to another airport (CUN) and traveled to Tulum. American gave a $12 voucher for lunch. The least expensive item on the menu at a Mexican restaurant was $9.99. Driving to Tulum was a bad auto crash, and traffic was delayed two-plus hours. The bottom line is that we should have been at the hotel at noon, but it ended up at 11:30 PM.

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.

Amazingly comfy flight - I had upgraded for a reasonable price and it was worth it. The food also was good.

Miami lounges were overcrowded and we were unable to get in. We only had a short time. But the banks are too tight in all American hubs

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

Information on your arrival and departure airports

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