STL - BUF

$93 Find Cheap Flights from St. Louis to Buffalo - Compare and Save

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 8/31. 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
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$162
Typical prices: $234-$453
Frontier
Fri 7/31Tue 8/4
STL - BUF • 1 stop
Cheapest one-way
$93
Typical prices: $140-$277
Frontier
Mon 8/31
STL - BUF • 1 stop
Top airlines
Cheapest • from $187 (round-trip)
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between St. Louis and Buffalo. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $235 (round-trip)
Shortest trip • 3h 40m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 4 weeks in advance save around 43% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 15% price drop
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

Fri, Jul 31 - Tue, Aug 4
Frontier Logo
4:57 pm - 11:33 am
STL
-
BUF
17h 36m
1 stop
Frontier Logo
11:29 am - 5:37 pm
BUF
-
STL
7h 08m
1 stop
$162Frontier
Sat, Jul 18 - Tue, Jul 21
Frontier Logo
4:57 pm - 10:29 am
STL
-
BUF
16h 32m
1 stop
Frontier Logo
11:29 am - 5:37 pm
BUF
-
STL
7h 08m
1 stop
$187Frontier
Sun, Jul 26 - Thu, Aug 6
Frontier Logo
6:34 pm - 1:53 pm
STL
-
BUF
18h 19m
1 stop
Frontier Logo
11:29 am - 5:37 pm
BUF
-
STL
7h 08m
1 stop
$190Frontier
Wed, Jul 29 - Wed, Aug 5
Frontier Logo
4:57 pm - 10:29 am
STL
-
BUF
16h 32m
1 stop
Frontier Logo
2:48 pm - 5:37 pm
BUF
-
STL
27h 49m
1 stop
$191Frontier
Mon, Aug 31 - Fri, Sep 4
Frontier Logo
6:17 pm - 10:29 am
STL
-
BUF
15h 12m
1 stop
Frontier Logo
11:36 am - 5:22 pm
BUF
-
STL
6h 46m
1 stop
$192Frontier
Fri, Aug 28 - Sun, Aug 30
Frontier Logo
6:17 pm - 10:29 am
STL
-
BUF
15h 12m
1 stop
Frontier Logo
11:36 am - 5:22 pm
BUF
-
STL
6h 46m
1 stop
$208Frontier
Fri, Aug 14 - Sun, Aug 16
Frontier Logo
4:57 pm - 11:33 am
STL
-
BUF
17h 36m
1 stop
Frontier Logo
11:29 am - 5:37 pm
BUF
-
STL
7h 08m
1 stop
$231Frontier
Fri, Aug 28 - Wed, Sep 2
Frontier Logo
6:17 pm - 10:29 am
STL
-
BUF
15h 12m
1 stop
Frontier Logo
6:54 pm - 5:22 pm
BUF
-
STL
23h 28m
2 stops
$232Frontier
Wed, Jul 29 - Sat, Aug 1
Frontier Logo
4:57 pm - 10:29 am
STL
-
BUF
16h 32m
1 stop
Frontier Logo
12:28 pm - 11:59 pm
BUF
-
STL
12h 31m
2 stops
$246Frontier
Tue, Jul 28 - Sat, Aug 1
Frontier Logo
6:34 pm - 1:53 pm
STL
-
BUF
18h 19m
1 stop
Frontier Logo
12:28 pm - 11:59 pm
BUF
-
STL
12h 31m
2 stops
$247Frontier
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.

How much is a round-trip flight from St. Louis to Buffalo?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from St. Louis to Buffalo departing in July.

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 January, where tickets cost $329 (return) on average. On the other hand, the most expensive months are April and March, where the average cost of round-trip tickets is $508 and $476 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 43% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 11 weeks before departure.

Good to know

Low seasonFebruary
Cheapest flight$93
Best time to beat the crowds with an average 13% drop in price.
Most popular time to fly and prices are also 6% 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 5 days, the lowest price for a flight from St. Louis to Buffalo was $93 for a one-way ticket and $187 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?

    SkyTeam, and oneworld are the airline alliances operating flights between St. Louis and Buffalo, with SkyTeam 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 $425 and an overall rating of 7.9, Southwest is the most popular choice. Delta is also a great choice for the route, with an average price of $328 and an overall rating of 7.8.

  • 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.
7.9
SouthwestOverall score based on 4246 reviews
8.6Crew
7.0Food
8.1Boarding
7.5Entertainment
8.0Comfort
Airline reviews

Snacks are always pretzels. Why can't you also offer peanuts ?

6.0 GoodAnonymous, Mar 2026
STL - HOU
Read more Southwest reviews

Snacks are always pretzels. Why can't you also offer peanuts ?

Only downside was the legroom and seat width, which is always a problem unless I spend more for a premium seat.

Very good. Sad to learn Southwest is going start to charge for bags

Exceptional crew! Friendly and professional. Pleasant attitude and treated everyone with respect.

The flight was promptly on schedule and Southwest delivered everything they promised. No excuses for any shortfalls just 100% ownership of their responsibilities and business. The boarding and seating policy is a complete shambles. What started out as a great idea when Southwest first hit the market has been turned into a disaster due to the lack of integrity in many of the people who fly Southwest and take advantage of Southwest generosity at the expense of their fellow passengers.

Crew was excellent - Plane was fine. Media was good, could use more kid shows; Not a fan of the brownie brittle -- snack could be slightly better.

C Am handicapped and couldn't get help with my luggage.

Left on time and arrived early. Brand new plane and no parts missing. Comfortable seats. The actual Captain spoke prior to the flight and reassured everyone about safety. Crew was so nice and fun. Perfect flight!

Everything went smoothly and the plane wasn’t full. It was delayed though. The delay was increased due to a crew change which was frustrating.

Love Southwest! Always a good trip with a happy crew who goes out of their way to be kind and fun.

The CRJ-900 was clean but the overhead air vents were broken in our First Class row, making the cabin very hot until about 30 mins into the flight. The flight attendants were both extremely apologetic and accommodating though so that is why I rated the flight as very good. They checked on us many times and truly showed they cared. The snacks for an hour and a half flight could be better. Would be nice if there was a small plated meal over convenient store snacks. WiFi also was not working. And it would be nice if Delta had adjustable headrests on these planes.

From checking to boarding, it was a seamless experience. The service agents were so helpful. The flight crew was so pleasant.

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!

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.

Great overall. There was a bit of turbulence so they could only serve water because too much turbulence for the carts. Was glad they prioritized safety though

A regional sized plane was used for a cross country flight with no overhead bin space. I had to "pink check" my laptop and my medications. I was NOT pleased!!!!

We flew early evening on New Year's Eve. Our plane was less than half full... Great for the passenger experience -- not so much for the airline lol. Comfortable, spacious, smooth flight -- and early arrival!

The plane smelled like a sewer. Multiple passengers complained. It’s a safety and quality issue to clean these planes.

We were delayed 2 hours leaving STL. I had 20 mins from when we landed in SLC terminal A to make it to SLC terminal B. I had to actually run! thankfully I made my flight but 3/4 legs were delayed to some capacity.

Terrible boarding and first class experience. Nice staff but overall disorganized, dirty plane.

American delayed the flight for a crew rest period. The delay occurred late in the evening - the earliest i can find is 10:20 pm. With a 6 am flight anyone on the flight would have already have been asleep (unless you are insane, a vampire or on drugs) and at least for me i was already on the way to the airport at 445 am the next morning when i discovered they delayed the flight until 9 am. Given the incoming flight was in the air at 6 pm the evening before this should have been figured out a lot more timely that was there only crew to use. Just frustrating given there is no consideration for customer experience anymore in flying.

I almost missed my flight and they helped me out enormously

Good crew and flight was on time. It’s a small plane with limited overhead luggage space. They said the overhead space was full and I had to check my bag. There was still space when I got on. Waiting for my checked luggage added 30 minutes to my trip. Not the end of the world but also not great.

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

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

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

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.

We liked quick boarding and on time departure. Seats were very uncomfortable.

It was quick, plane was loaded and the service on board was ok

A 630departure flight Delayed 6hours! They changed my gate, I moved to the new gate. Had our flight on the screen for 12noon departure. I go get above to eat, check screen again and the flight was gone, no notice no announcement, nothing!! They sent my bag on the flight I wasn’t on, got it back to me 3days later. Thank goodness they did refund my money but I will NEVER fly them again.

Plane and crew on board were fine. Everything else was terrible.

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.

My first flight was delayed 5 hours. The 2nd flight was canceled til the next day and the never even tried to compensate for it. Worse I was delayed again on the flight the rebooked me on.

Would be great if Frontier can Assign Seats together under one PNR

Delayed for two hours due to trivial issues. No reimbursment. Also on arrival further delay due to terminal malfunction.

Did not realize seats did not recline. Best to travel in an exit row... No question

First time flying with Frontier . From buying tickets ,getting boarding pass and boarding plane was super easy. Definitely would fly again with Frontier .

I have come to accept Frontier as an absolute no-frills airline, paying for everything I want. A 4.5-hour flight should provide me with a complimentary beverage—rather, $4.9x for a soda. Or a bottle of water ought to be extended at no cost. 4 beers are on the menu, but only 1 type of beer is available (at $9.95). Also, so many restrictions to using a voucher from Barclay‘s Credit Card. Finally, try to reach a live agent for Frontier- impossible!

The only thing that may be concerning to others is the multiple notifications of a delayed flight. Then, with less than an hour before boarding, the flight was on time. The gate changed several times, leading to confusion.

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

Information on your arrival and departure airports