BUF - STL

$79 Find Cheap Flights from Buffalo to St. Louis

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Buffalo to St. Louis departing on 3/1. 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 St. Louis

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Buffalo to St. Louis, 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 Buffalo to St. Louis, as well as popular online travel agencies
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 23% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Everything you should know

Cheapest round-trip
$151
Overall average: $388
Frontier
Sun 2/22Wed 2/25
BUF - STL • 1 stop
Cheapest one-way
$79
Typical prices: $201-$267
Frontier
Sun 3/1
BUF - STL • 1 stop
Top airlines
Frontier
Cheapest • from $151 (round-trip)
Southwest
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
September
Cheapest • 13% price drop
October
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 St. Louis!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Buffalo to St. Louis (BUF-STL)

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

Sun, Feb 22 - Wed, Feb 25
Frontier Logo
2:19 pm - 6:51 am
BUF
-
STL
17h 32m
1 stop
Frontier Logo
8:17 pm - 12:54 pm
STL
-
BUF
15h 37m
1 stop
$151Frontier
Sun, Feb 22 - Wed, Feb 25
Frontier Logo
2:19 pm - 6:51 am
BUF
-
STL
17h 32m
1 stop
Frontier Logo
8:17 pm - 11:34 am
STL
-
BUF
14h 17m
2 stops
$220Frontier
Thu, Feb 26 - Sun, Mar 1
Frontier Logo
1:39 pm - 6:51 am
BUF
-
STL
18h 12m
1 stop
Frontier Logo
3:49 pm - 10:49 am
STL
-
BUF
18h 00m
1 stop
$260Frontier
Thu, Feb 26 - Sun, Mar 1
Frontier Logo
1:39 pm - 6:51 am
BUF
-
STL
18h 12m
1 stop
Frontier Logo
3:49 pm - 12:53 pm
STL
-
BUF
20h 04m
2 stops
$277Frontier
Fri, Apr 24 - Wed, Apr 29
Frontier Logo
11:25 am - 11:19 pm
BUF
-
STL
12h 54m
1 stop
Frontier Logo
4:55 pm - 7:13 pm
STL
-
BUF
25h 18m
1 stop
$281Frontier
Thu, Apr 30 - Sun, May 3
Frontier Logo
1:08 pm - 6:50 am
BUF
-
STL
18h 42m
1 stop
Frontier Logo
11:21 am - 12:13 pm
STL
-
BUF
23h 52m
1 stop
$286Frontier
Fri, Feb 20 - Tue, Feb 24
Multiple Airlines Logo
1:29 pm - 6:51 am
BUF
-
STL
18h 22m
1 stop
Multiple Airlines Logo
3:49 pm - 12:54 pm
STL
-
BUF
44h 05m
2 stops
$293Multiple Airlines
Sun, Mar 8 - Thu, Mar 12
Frontier Logo
1:00 pm - 1:19 pm
BUF
-
STL
25h 19m
1 stop
Frontier Logo
9:05 pm - 12:05 pm
STL
-
BUF
14h 00m
2 stops
$320Frontier
Thu, Apr 30 - Sun, May 3
Frontier Logo
1:08 pm - 11:19 pm
BUF
-
STL
11h 11m
2 stops
Frontier Logo
11:21 am - 12:13 pm
STL
-
BUF
23h 52m
1 stop
$326Frontier
Wed, Mar 11 - Mon, Mar 16
Delta Logo
6:02 am - 12:19 pm
BUF
-
STL
7h 17m
1 stop
Delta Logo
5:59 pm - 10:55 pm
STL
-
BUF
3h 56m
1 stop
$342Delta
Booking Insights

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

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

What is the cheapest month to fly from Buffalo to St. Louis?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Buffalo to St. Louis, 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 Buffalo to St. Louis is September, where tickets cost $304 (return) on average. On the other hand, the most expensive months are February and March, where the average cost of round-trip tickets is $388 and $386 respectively.

Good to know

Low seasonAugust
Cheapest flight$79
Best time to beat the crowds with an average 7% drop in price.
Most popular time to fly with an average 2% increase in price.
Flight from Buffalo to St. Louis

When to book flights from Buffalo to St. Louis

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

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

    In the last 3 days, the lowest price for a flight from Buffalo to St. Louis was $79 for a one-way ticket and $151 for a round-trip.

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

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

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

    Buffalo airport is called Buffalo and the only airport in St. Louis is Lambert-St Louis.

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

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

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

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

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

    The two airlines most popular with KAYAK users for flights from Buffalo to St. Louis are Southwest and Delta. With an average price for the route of $406 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 $345 and an overall rating of 7.9.

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

    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 Buffalo to St. Louis.

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

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

    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 St. Louis with an airline and back to Buffalo with another airline. Booking your flights between Buffalo and STL 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 Buffalo to St. Louis?

    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 St. Louis from Buffalo 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 Buffalo to St. Louis

 
See real verified KAYAK customer reviews for airlines flying from Buffalo to St. Louis. 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 Buffalo to St. Louis? 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 4280 reviews
8.1Boarding
8.6Crew
7.0Food
8.0Comfort
7.5Entertainment
Airline reviews

My flight from Denver to Minneapolis was excellent. My flight from Minneapolis to Denver was one of the worst I flights I have ever experienced. I had a window seat, the gentleman in the middle seat was morbidly obese and SW should have made him purchase two seats. His elbow dug into my arm most of the way even after I asked to please be careful. I was literally squashed between the him and the window with no wiggle room. The plane was full so it was not possible to ask for a different seat. I realize I should have complained to the flight attendant but I didn't feel anything could be done to rectify the situation. I fly SW often, I will continue to do so as this was my first negative experience.

10.0 ExcellentCarol, Feb 2026
DEN - MSP
Read more Southwest reviews

My flight from Denver to Minneapolis was excellent. My flight from Minneapolis to Denver was one of the worst I flights I have ever experienced. I had a window seat, the gentleman in the middle seat was morbidly obese and SW should have made him purchase two seats. His elbow dug into my arm most of the way even after I asked to please be careful. I was literally squashed between the him and the window with no wiggle room. The plane was full so it was not possible to ask for a different seat. I realize I should have complained to the flight attendant but I didn't feel anything could be done to rectify the situation. I fly SW often, I will continue to do so as this was my first negative experience.

I was assigned seat 7E, yet my boarding was Group 5, which caused me to have to put my luggage in the back of the plance above `19 or 20 aisle, as passengers who had boarded earlier took the overhead bins in the front. SW needs to monitor bin space and ensure that bin space above the seat are aligned to those sitting near their seats. Also the seating assignments needs to align with group number. Maybe board those last first and so on? Having said the ALL the passengers on the plane were gracious enough to allow me and other passengers in this dilema to retrieve our luggage and helped us along the way. I always love the flight staff, as always their fantastic and I can't rave about them enough!

I appreciate the staff who allowed me to board though I arrived a little late! Regarding the assigned seating, I had booked my flight before this change and wasn't aware of the change at the time, and so I didn't select a seat at booking as I didn't realize it was relevant. Better communication about the change would have been helpful for preparing.

Flight attendants very hospitable and friendly. Pilot flew a smooth take off and landing.

Paid for premium extra leg room but the bin space for rows 1-3 had to go in rows 4-6 and 4-6 had to go to 7-9 because flight attendants have snacks and their luggage upfront. So we pay extra to have to fight thru traffic to get our bags. Only 2nd day of new seating so hope they fix this.

WIFI was great. My selection for seating is an aisle, but during my trip, I never had an aisle seat. If we can get that corrected, I will be thrilled. No snack or drink on this flight.

WIFI was great. My selection for seating is an aisle, but during my trip, I never had an aisle seat. If we can get that corrected, I will be thrilled.

The wifi on the plane is great. The only issue that I have is that I prefer an aisle seat and on my trips this week, I was either in the middle or window. If we can work to secure aisle seating, I will be thrilled. Nice trip.

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.

They double booked seats, the gate staff changed my ticket as I was boarding she went over to the computer and changed it without telling me. She messed up an entire three row section for me and others. Other travelers were outraged but the gate staff were so rude, so condescending saying it wasn't their problem to solve. I would rate this a zero if I could. Will not fly Delta again I'll stick with United and American.

It was last minute due to weather - considering - it was amazing! Good smiles, friendly staff and they were making sure we knew what was going on when and where.

The entertainment screens were not working and there was no air condition the entire flight. Very uncomfortable.

It was Delta, but the flight attendants were stressful and disrespectful. I am a diamond member a travel weekly. I have not had a negative thing to share in quite some time. But this was noticeable.

The plant way delayed departing by 3 hours. It was an old airplane with broken seats and armrests. The bathroom made a hollering sound. A really crappy flight experience and travel day all around.

Original flight was cancelled and when i was rebooked by the airline, they couldn't seat me in the same type of seat as I had originally booked (went from window/aisle to middle/middle and one was a bulkhead seat, and other wasn't in the same class)

My flight was cancelled with no explanation after I had already cleared security. I was given 4 options to rebook, only one being non-stop like I had paid for. I grabbed it. It was 4 plus hours later and then took off even later. Biggest complaint is that I booked early and had an aisle seat. They gave me a "window" seat in front of the exit row, so the seat did not decline. I weigh all of 103 #s and it was tight for me! For what I paid, I feel I was kind of ripped off. I think they should have given me the empty comfort seat for the inconvenience. There was no apology nor any explanation as to why the flight was cancelled. My guess is it benefitted Delta in some way.

Very smooth, on-time, and pleasantly uneventful flight. The team at the gate and on board were professional and genuinely courteous. The pilot kept us well updated throughout, and both takeoff and landing were steady and enjoyable without any drama. Just a good, solid flight. Thank you! 💗

I truly love flying with Delta. They have always treated me with the upmost respect

The boarding process needs to be refined. Sometimes the gate crew calls out the zones and then flip to showing the.zones boarding on the gate monitor display. So, unless you are huddled around the gate lanes watching the monitor, you could miss your boarding zone. Suggest the zones be announced each time a new zone is allowed to board.

This flight captain and crew were amazing, started ahead of time of departure and reached 30 mins before arrival time. Amazing!

I would like the crew to talk LESS over the PA and specifically about credit card offers. I am trying to work, sleep, watch a movie and the PA was booming about a credit card offer. Could we go back to the days when the customer was more important than selling a credit card?

My seat tv didn’t work the whole trip. And the seat space is too small despite being seated at the front.

On the plus side, crew was attentive, drinks were cold, and in-flight entertainment selection was better than some other airlines. On the negative aide, Plane was delayed almost an hour, either no announcements from the gate crew. Biscoff cookies are gross, appreciate airlines that give a choice. Also, crew had no personality or enthusiasm at all.

Tell the crew (when boarding) to yell at the imbeciles blocking us from walking up to scan. I promise everyone crowds around and half of us (most the time I’m group 4) have to push our way through. Your staff is awesome, the public - not so much-

Baggage handling poor. Second time this has happened. My bag went to San Francisco instead of Fiji. No apology. Luckily Nadi airport staff are fantastic. My bag arrived in Fiji the next day.

They only offered water for Group 6. Awful announcements from the Crew. Couldn't understand a single word. Barely came by for the trash afterwards. Man, I love water for a premium flight. Wow. Water in a cup.

Great. Quick and quiet and east. The breakfast choices were a welcome surprise!

The comfort of the seats was great, the crew eased my child’s anxieties and the fact that I had full cans of my beverage choice was great.

Waited on the runway for takeoff for 2.5 hours. Air traffic rerouted us. The plane didn't have enough fuel, so had to go back to the gate. Had to wait for a new pilot. Should have landed at 5:22. Didn't land until 9:10. Trash flight.

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

Information on your arrival and departure airports