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Cheap flights from Buffalo to St. Louis from $76

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 3/19. 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
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
$213Frontier
Mon, Apr 20 - Wed, Apr 22
Frontier Logo
8:59 pm - 7:51 am
BUF
-
STL
11h 52m
1 stop
Frontier Logo
8:13 pm - 12:13 pm
STL
-
BUF
15h 00m
1 stop
$224Frontier
Thu, Apr 9 - Sat, Apr 18
Frontier Logo
7:17 pm - 10:27 pm
BUF
-
STL
28h 10m
1 stop
Frontier Logo
7:47 am - 8:30 pm
STL
-
BUF
11h 43m
1 stop
$245Frontier
Tue, Mar 3 - Fri, Mar 6
Frontier Logo
7:17 pm - 10:27 pm
BUF
-
STL
28h 10m
1 stop
Frontier Logo
3:49 pm - 10:49 am
STL
-
BUF
18h 00m
1 stop
$254Frontier
Tue, Mar 3 - Thu, Mar 5
American Airlines Logo
12:31 pm - 3:35 pm
BUF
-
STL
4h 04m
1 stop
American Airlines Logo
7:05 am - 3:25 pm
STL
-
BUF
7h 20m
1 stop
$257American Airlines
Wed, Mar 11 - Wed, Mar 18
Frontier Logo
1:02 pm - 7:51 am
BUF
-
STL
19h 49m
2 stops
Frontier Logo
8:13 pm - 12:13 pm
STL
-
BUF
15h 00m
1 stop
$279Frontier
Thu, Apr 9 - Sat, Apr 18
American Airlines Logo
11:31 am - 4:41 pm
BUF
-
STL
6h 10m
1 stop
American Airlines Logo
5:46 am - 10:50 am
STL
-
BUF
4h 04m
1 stop
$282American Airlines
Tue, Apr 7 - Mon, Apr 13
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
$286Frontier
Thu, Feb 26 - Mon, Mar 2
American Airlines Logo
6:06 am - 10:03 am
BUF
-
STL
4h 57m
1 stop
American Airlines Logo
3:33 pm - 10:50 pm
STL
-
BUF
6h 17m
1 stop
$307American Airlines
Thu, Mar 26 - Mon, Mar 30
United Airlines Logo
5:50 pm - 9:08 pm
BUF
-
STL
4h 18m
1 stop
United Airlines Logo
9:00 am - 4:54 pm
STL
-
BUF
6h 54m
1 stop
$312United Airlines
Fri, May 1 - Tue, May 5

Frontier flights from Buffalo to St. Louis

Our best Frontier deals on Buffalo to St. Louis flight tickets
Frontier
Apr 20
BUF11:25 amBuffalo
12h 54m
1 stop
STL11:19 pmLambert-St Louis
Apr 22
STL4:55 pmLambert-St Louis
25h 18m
1 stop
BUF7:13 pmBuffalo
$213
Frontier
Apr 9
BUF8:59 pmBuffalo
11h 52m
1 stop
STL7:51 amLambert-St Louis
Apr 18
STL8:13 pmLambert-St Louis
15h 00m
1 stop
BUF12:13 pmBuffalo
$224
Frontier
Mar 3
BUF7:17 pmBuffalo
28h 10m
1 stop
STL10:27 pmLambert-St Louis
Mar 6
STL7:47 amLambert-St Louis
11h 43m
1 stop
BUF8:30 pmBuffalo
$245

American Airlines flights from Buffalo to St. Louis

Our best American Airlines deals on Buffalo to St. Louis flight tickets
American Airlines
Mar 11
BUF12:31 pmBuffalo
4h 04m
1 stop
STL3:35 pmLambert-St Louis
Mar 18
STL7:05 amLambert-St Louis
7h 20m
1 stop
BUF3:25 pmBuffalo
$257
American Airlines
Apr 7
BUF11:31 amBuffalo
6h 10m
1 stop
STL4:41 pmLambert-St Louis
Apr 13
STL5:46 amLambert-St Louis
4h 04m
1 stop
BUF10:50 amBuffalo
$282
American Airlines
Mar 26
BUF6:06 amBuffalo
4h 57m
1 stop
STL10:03 amLambert-St Louis
Mar 30
STL3:33 pmLambert-St Louis
6h 17m
1 stop
BUF10:50 pmBuffalo
$307

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 February 15, 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

Mon 4/20

11:25 am-11:19 pm

1 stop12h 54m

Lambert-St Louis

Wed 4/22

4:55 pm-7:13 pm

1 stop25h 18m

$213

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Thu 4/9

8:59 pm-7:51 am

1 stop11h 52m

Lambert-St Louis

Sat 4/18

8:13 pm-12:13 pm

1 stop15h 00m

$224

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Tue 3/3

7:17 pm-10:27 pm

1 stop28h 10m

Lambert-St Louis

Fri 3/6

7:47 am-8:30 pm

1 stop11h 43m

$245

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Tue 3/3

7:17 pm-10:27 pm

1 stop28h 10m

Lambert-St Louis

Thu 3/5

3:49 pm-10:49 am

1 stop18h 00m

$254

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Wed 3/11

12:31 pm-3:35 pm

1 stop4h 04m

Lambert-St Louis

Wed 3/18

7:05 am-3:25 pm

1 stop7h 20m

$257

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Thu 4/9

1:02 pm-7:51 am

2 stops19h 49m

Lambert-St Louis

Sat 4/18

8:13 pm-12:13 pm

1 stop15h 00m

$279

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Tue 4/7

11:31 am-4:41 pm

1 stop6h 10m

Lambert-St Louis

Mon 4/13

5:46 am-10:50 am

1 stop4h 04m

$282

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Thu 2/26

1:39 pm-6:51 am

1 stop18h 12m

Lambert-St Louis

Mon 3/2

8:22 pm-6:21 pm

2 stops20h 59m

$286

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Thu 3/26

6:06 am-10:03 am

1 stop4h 57m

Lambert-St Louis

Mon 3/30

3:33 pm-10:50 pm

1 stop6h 17m

$307

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Fri 5/1

5:50 pm-9:08 pm

1 stop4h 18m

Lambert-St Louis

Tue 5/5

9:00 am-4:54 pm

1 stop6h 54m

$312

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 typical price of a round-trip flight between Buffalo and St. Louis?

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 $316. The month of December is another great option to travel to St. Louis, with average flight prices from Buffalo averaging around $319.

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

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 04m

Direct flights

None
The fastest flight from Buffalo to St. Louis takes 4h 04m
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 04m, 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
8,205 reviews
Search Delta flights
American AirlinesPriceFrom $236Free CancellationRating
7.2
11,297 reviews
Search American Airlines flights
SouthwestPriceFrom $317Free CancellationRating
8.0
4,286 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
St. Peters
Fenton
Wentzville
Alton
Farmington
Clayton
Edwardsville
Eureka
Festus
Litchfield
Glencoe
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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