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Cheap flights from Buffalo to St. Louis from $102

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 2/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
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
1:29 pm - 6:51 am
BUF
-
STL
18h 22m
1 stop
Frontier Logo
8:22 pm - 11:05 am
STL
-
BUF
13h 43m
1 stop
$151Frontier
Fri, Feb 20 - Fri, Feb 27
Frontier Logo
1:29 pm - 6:51 am
BUF
-
STL
18h 22m
1 stop
Frontier Logo
3:49 pm - 11:05 am
STL
-
BUF
18h 16m
2 stops
$180Frontier
Fri, Feb 20 - Fri, Feb 27
United Airlines Logo
5:55 pm - 9:08 pm
BUF
-
STL
4h 13m
1 stop
United Airlines Logo
9:10 am - 5:10 pm
STL
-
BUF
7h 00m
1 stop
$277United Airlines
Tue, Apr 21 - Tue, Apr 28
Southwest Logo
9:25 am - 12:50 pm
BUF
-
STL
4h 25m
1 stop
Southwest Logo
7:35 am - 2:35 pm
STL
-
BUF
6h 00m
2 stops
$282Southwest
Tue, Apr 21 - Tue, Apr 28
Southwest Logo
1:10 pm - 8:00 pm
BUF
-
STL
7h 50m
2 stops
Southwest Logo
7:35 am - 2:35 pm
STL
-
BUF
6h 00m
2 stops
$287Southwest
Tue, Apr 21 - Tue, Apr 28
Frontier Logo
1:39 pm - 6:51 am
BUF
-
STL
18h 12m
1 stop
Frontier Logo
3:49 pm - 6:21 pm
STL
-
BUF
25h 32m
1 stop
$292Frontier
Thu, Feb 12 - Mon, Feb 16
Southwest Logo
10:55 am - 6:10 pm
BUF
-
STL
8h 15m
1 stop
Southwest Logo
2:30 pm - 10:15 pm
STL
-
BUF
6h 45m
2 stops
$297Southwest
Thu, May 7 - Tue, May 12
Frontier Logo
1:39 pm - 6:51 am
BUF
-
STL
18h 12m
1 stop
Frontier Logo
8:22 pm - 6:21 pm
STL
-
BUF
20h 59m
2 stops
$298Frontier
Thu, Feb 12 - Mon, Feb 16
United Airlines Logo
5:24 pm - 9:40 pm
BUF
-
STL
5h 16m
1 stop
United Airlines Logo
8:30 am - 2:13 pm
STL
-
BUF
4h 43m
1 stop
$322United Airlines
Sun, Feb 22 - Tue, Feb 24
United Airlines Logo
5:24 pm - 9:05 pm
BUF
-
STL
4h 41m
1 stop
United Airlines Logo
6:25 am - 2:13 pm
STL
-
BUF
6h 48m
2 stops
$327United Airlines
Sun, Feb 22 - Tue, Feb 24

Delta flights from Buffalo to St. Louis

Our best Delta deals on Buffalo to St. Louis flight tickets
Delta
Mar 13
BUF1:00 pmBuffalo
4h 32m
1 stop
STL4:32 pmLambert-St Louis
Mar 20
STL6:32 amLambert-St Louis
4h 12m
1 stop
BUF11:44 amBuffalo
$367
Delta
Feb 11
BUF10:37 amBuffalo
7h 05m
1 stop
STL4:42 pmLambert-St Louis
Feb 14
STL10:14 amLambert-St Louis
5h 45m
1 stop
BUF4:59 pmBuffalo
$447
Delta
Feb 11
BUF6:00 amBuffalo
11h 37m
2 stops
STL4:37 pmLambert-St Louis
Feb 17
STL10:14 amLambert-St Louis
5h 45m
1 stop
BUF4:59 pmBuffalo
$468

United Airlines flights from Buffalo to St. Louis

Our best United Airlines deals on Buffalo to St. Louis flight tickets
United Airlines
Apr 21
BUF5:55 pmBuffalo
4h 13m
1 stop
STL9:08 pmLambert-St Louis
Apr 28
STL9:10 amLambert-St Louis
7h 00m
1 stop
BUF5:10 pmBuffalo
$277
United Airlines
Feb 22
BUF5:24 pmBuffalo
5h 16m
1 stop
STL9:40 pmLambert-St Louis
Feb 24
STL8:30 amLambert-St Louis
4h 43m
1 stop
BUF2:13 pmBuffalo
$322
United Airlines
Feb 22
BUF5:24 pmBuffalo
4h 41m
1 stop
STL9:05 pmLambert-St Louis
Feb 24
STL6:25 amLambert-St Louis
6h 48m
2 stops
BUF2:13 pmBuffalo
$327

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 29, 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

Fri 2/20

1:29 pm-6:51 am

1 stop18h 22m

Lambert-St Louis

Fri 2/27

8:22 pm-11:05 am

1 stop13h 43m

$151

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Fri 2/20

1:29 pm-6:51 am

1 stop18h 22m

Lambert-St Louis

Fri 2/27

3:49 pm-11:05 am

2 stops18h 16m

$180

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Tue 4/21

5:55 pm-9:08 pm

1 stop4h 13m

Lambert-St Louis

Tue 4/28

9:10 am-5:10 pm

1 stop7h 00m

$277

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Tue 4/21

9:25 am-12:50 pm

1 stop4h 25m

Lambert-St Louis

Tue 4/28

7:35 am-2:35 pm

2 stops6h 00m

$282

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Tue 4/21

1:10 pm-8:00 pm

2 stops7h 50m

Lambert-St Louis

Tue 4/28

7:35 am-2:35 pm

2 stops6h 00m

$287

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Thu 2/12

1:39 pm-6:51 am

1 stop18h 12m

Lambert-St Louis

Mon 2/16

3:49 pm-6:21 pm

1 stop25h 32m

$292

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Thu 5/7

10:55 am-6:10 pm

1 stop8h 15m

Lambert-St Louis

Tue 5/12

2:30 pm-10:15 pm

2 stops6h 45m

$297

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Thu 2/12

1:39 pm-6:51 am

1 stop18h 12m

Lambert-St Louis

Mon 2/16

8:22 pm-6:21 pm

2 stops20h 59m

$298

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Sun 2/22

5:24 pm-9:40 pm

1 stop5h 16m

Lambert-St Louis

Tue 2/24

8:30 am-2:13 pm

1 stop4h 43m

$322

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Sun 2/22

5:24 pm-9:05 pm

1 stop4h 41m

Lambert-St Louis

Tue 2/24

6:25 am-2:13 pm

2 stops6h 48m

$327

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 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

4h 20m

Direct flights

None
The fastest flight from Buffalo to St. Louis takes 4h 20m
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 4h 20m, 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
8,128 reviews
Search Delta flights
American AirlinesPriceFrom $243Free CancellationRating
7.2
11,205 reviews
Search American Airlines flights
United AirlinesPriceFrom $316Free CancellationRating
7.4
9,215 reviews
Search United Airlines flights
SouthwestPriceFrom $338Free CancellationRating
8.0
4,267 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
Maryland Heights
Florissant
O'Fallon
Collinsville
Fenton
St. Peters
Wentzville
Alton
Farmington
Clayton
Edwardsville
Eureka
Festus
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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