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Cheap flights from Buffalo to St. Louis from $118

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Buffalo to St. Louis departing on 2/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Buffalo to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
12:29 pm - 8:24 am
BUF
-
STL
20h 55m1 stop
Frontier Logo
10:16 am - 6:36 pm
STL
-
BUF
7h 20m1 stop
$195Frontier
Sat, Jan 31 - Mon, Feb 2
Southwest Logo
7:30 am - 1:50 pm
BUF
-
STL
7h 20m1 stop
Southwest Logo
8:30 am - 2:05 pm
STL
-
BUF
4h 35m1 stop
$215Southwest
Tue, Feb 10 - Mon, Feb 16
Southwest Logo
5:50 am - 12:45 pm
BUF
-
STL
7h 55m2 stops
Southwest Logo
8:30 am - 2:05 pm
STL
-
BUF
4h 35m1 stop
$220Southwest
Tue, Feb 10 - Mon, Feb 16
Frontier Logo
9:25 pm - 5:57 am
BUF
-
STL
9h 32m1 stop
Frontier Logo
4:51 pm - 10:49 am
STL
-
BUF
16h 58m1 stop
$224Frontier
Sat, Mar 7 - Sun, Mar 8
American Airlines Logo
6:02 pm - 9:12 pm
BUF
-
STL
4h 10m1 stop
American Airlines Logo
12:11 pm - 5:14 pm
STL
-
BUF
4h 03m1 stop
$235American Airlines
Thu, Feb 26 - Tue, Apr 7
Frontier Logo
1:39 pm - 6:51 am
BUF
-
STL
18h 12m1 stop
Frontier Logo
5:42 pm - 12:44 pm
STL
-
BUF
18h 02m2 stops
$237Frontier
Fri, Feb 6 - Sun, Feb 8
Delta Logo
4:59 pm - 11:33 pm
BUF
-
STL
7h 34m1 stop
Delta Logo
7:20 am - 3:59 pm
STL
-
BUF
7h 39m1 stop
$248Delta
Tue, May 5 - Thu, May 7
Frontier Logo
1:39 pm - 6:51 am
BUF
-
STL
18h 12m1 stop
Frontier Logo
5:42 pm - 6:36 pm
STL
-
BUF
23h 54m1 stop
$249Frontier
Fri, Feb 6 - Sun, Feb 8
United Airlines Logo
11:24 am - 7:27 pm
BUF
-
STL
9h 03m2 stops
United Airlines Logo
8:30 am - 2:14 pm
STL
-
BUF
4h 44m1 stop
$251United Airlines
Sat, Jan 31 - Mon, Feb 2
Southwest Logo
8:00 am - 10:30 am
BUF
-
STL
3h 30m1 stop
Southwest Logo
6:35 am - 2:35 pm
STL
-
BUF
7h 00m1 stop
$277Southwest
Sat, Apr 18 - Tue, Apr 21

Delta flights from Buffalo to St. Louis

Our best Delta deals on Buffalo to St. Louis flight tickets
Delta
May 5
BUF4:59 pmBuffalo
7h 34m
1 stop
STL11:33 pmLambert-St Louis
May 7
STL7:20 amLambert-St Louis
7h 39m
1 stop
BUF3:59 pmBuffalo
$248
Delta
May 28
BUF4:57 pmBuffalo
7h 41m
1 stop
STL11:38 pmLambert-St Louis
Jun 3
STL6:00 amLambert-St Louis
6h 46m
1 stop
BUF1:46 pmBuffalo
$342
Delta
May 28
BUF12:07 pmBuffalo
6h 55m
1 stop
STL6:02 pmLambert-St Louis
May 30
STL5:45 pmLambert-St Louis
4h 18m
1 stop
BUF11:03 pmBuffalo
$367

American Airlines flights from Buffalo to St. Louis

Our best American Airlines deals on Buffalo to St. Louis flight tickets
American Airlines
Feb 26
BUF6:02 pmBuffalo
4h 10m
1 stop
STL9:12 pmLambert-St Louis
Apr 7
STL12:11 pmLambert-St Louis
4h 03m
1 stop
BUF5:14 pmBuffalo
$235
American Airlines
Mar 24
BUF6:05 amBuffalo
4h 24m
1 stop
STL9:29 amLambert-St Louis
Mar 27
STL3:33 pmLambert-St Louis
6h 17m
1 stop
BUF10:50 pmBuffalo
$281
American Airlines
Jan 26
BUF5:12 amBuffalo
5h 12m
1 stop
STL9:24 amLambert-St Louis
Jan 28
STL3:30 pmLambert-St Louis
6h 10m
1 stop
BUF10:40 pmBuffalo
$318

momondo Fare Finder

 
Customize your flight search to find flights from Buffalo to St. Louis that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated January 8, 2026.
Use the filters below to find and compare flights from Buffalo to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Sat 1/31

12:29 pm-8:24 am

1 stop20h 55m

Lambert-St Louis

Mon 2/2

10:16 am-6:36 pm

1 stop7h 20m

$195

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Tue 2/10

7:30 am-1:50 pm

1 stop7h 20m

Lambert-St Louis

Mon 2/16

8:30 am-2:05 pm

1 stop4h 35m

$215

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Tue 2/10

5:50 am-12:45 pm

2 stops7h 55m

Lambert-St Louis

Mon 2/16

8:30 am-2:05 pm

1 stop4h 35m

$220

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Sat 3/7

9:25 pm-5:57 am

1 stop9h 32m

Lambert-St Louis

Sun 3/8

4:51 pm-10:49 am

1 stop16h 58m

$224

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Thu 2/26

6:02 pm-9:12 pm

1 stop4h 10m

Lambert-St Louis

Tue 4/7

12:11 pm-5:14 pm

1 stop4h 03m

$235

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Fri 2/6

1:39 pm-6:51 am

1 stop18h 12m

Lambert-St Louis

Sun 2/8

5:42 pm-12:44 pm

2 stops18h 02m

$237

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Tue 5/5

4:59 pm-11:33 pm

1 stop7h 34m

Lambert-St Louis

Thu 5/7

7:20 am-3:59 pm

1 stop7h 39m

$248

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Fri 2/6

1:39 pm-6:51 am

1 stop18h 12m

Lambert-St Louis

Sun 2/8

5:42 pm-6:36 pm

1 stop23h 54m

$249

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Sat 1/31

11:24 am-7:27 pm

2 stops9h 03m

Lambert-St Louis

Mon 2/2

8:30 am-2:14 pm

1 stop4h 44m

$251

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Sat 4/18

8:00 am-10:30 am

1 stop3h 30m

Lambert-St Louis

Tue 4/21

6:35 am-2:35 pm

1 stop7h 00m

$277

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 19 resultsSorted by cheapest first
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See travel insights to St. Louis from

How to get the cheapest flight ticket from Buffalo to St. Louis

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

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

In general, September is the cheapest month to fly from Buffalo to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $304. The month of July is another great option to travel to St. Louis, with average flight prices from Buffalo averaging around $312.

How have Buffalo to St. Louis flight prices changed over time?

As of January 2026, prices for Buffalo to St. Louis flights are approximately 331% more expensive when compared to flights at the same time last year.

When to book flights from Buffalo to St. Louis

Are you open to changing your travel dates? Check out the ideal times to fly from Buffalo to St. Louis according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Buffalo to St. Louis (BUF to STL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Buffalo to St. Louis

Fastest flight time

3h 30m

Direct flights

None
The fastest flight from Buffalo to St. Louis takes 3h 30m
There are no direct flights from Buffalo to St. Louis. There are no popular flight routes from Buffalo to St. Louis.
Search flight deals

  • How far is Buffalo to Lambert-St Louis by plane?

    A flight from Buffalo to Lambert-St Louis will travel around 660.3 mi. Flights usually cover this in 3h 30m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Buffalo Airport to Lambert-St Louis Airport?

    Prices for flights from Buffalo Airport to Lambert-St Louis Airport were last updated today.

  • How many operators does momondo search for flights from Buffalo Airport to Lambert-St Louis Airport?

  • How old do you have to be to fly from Buffalo Airport to Lambert-St Louis Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Buffalo Airport to Lambert-St Louis Airport.

  • What documentation or ID do you need to fly to Lambert-St Louis Airport?

    The required travel and health documents for your Lambert-St Louis Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Lambert-St Louis Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular airline from Buffalo to St. Louis?

Best airlines flying from Buffalo to St. Louis

Compare and see reviews for airlines that fly from Buffalo to St. Louis with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $164Free CancellationRating
7.9
8,025 reviews
Search Delta flights
American AirlinesPriceFrom $243Free CancellationRating
7.2
11,095 reviews
Search American Airlines flights
United AirlinesPriceFrom $316Free CancellationRating
7.4
9,139 reviews
Search United Airlines flights
SouthwestPriceFrom $338Free CancellationRating
8.0
4,248 reviews
Search Southwest flights

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles
Chesterfield
Hermann
Fairview Heights
O'Fallon
Maryland Heights
Florissant
Fenton
Collinsville
St. Peters
Wentzville
Alton
Farmington
Clayton
Eureka
Festus
Edwardsville
Glencoe
Litchfield
Shrewsbury

Why use momondo?

Why should I use momondo to find a flight deal from Buffalo to St. Louis?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Buffalo to St. Louis. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Buffalo to St. Louis with flexible booking policies on momondo?

All flight searches from Buffalo to St. Louis on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Buffalo to St. Louis?

Once all potential Buffalo to St. Louis flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Buffalo to St. Louis right now. Can momondo alert me if prices change?

If you are simply researching potential flights to St. Louis, momondo offers a useful price alert feature which will track prices for flights to St. Louis from Buffalo and alert you when they change.

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