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Cheap flights from Buffalo to St. Louis from $86

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 4/9. 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
1:02 pm - 11:25 pm
BUF
-
STL
11h 23m
2 stops
Frontier Logo
8:23 pm - 11:40 am
STL
-
BUF
14h 17m
1 stop
$212Frontier
Wed, Apr 8 - Wed, Apr 15
Frontier Logo
9:25 pm - 12:19 pm
BUF
-
STL
39h 54m
2 stops
Frontier Logo
11:32 am - 12:05 pm
STL
-
BUF
23h 33m
1 stop
$250Frontier
Sat, Mar 7 - Wed, Mar 18
Delta Logo
10:23 am - 4:31 pm
BUF
-
STL
7h 08m
1 stop
Delta Logo
6:10 am - 2:19 pm
STL
-
BUF
7h 09m
1 stop
$257Delta
Wed, Mar 11 - Wed, Mar 18
Frontier Logo
7:41 pm - 7:10 pm
BUF
-
STL
24h 29m
1 stop
Frontier Logo
4:51 pm - 10:49 am
STL
-
BUF
16h 58m
1 stop
$271Frontier
Sat, Mar 7 - Wed, Mar 18
Southwest Logo
5:20 pm - 11:25 pm
BUF
-
STL
7h 05m
1 stop
Southwest Logo
6:35 am - 2:35 pm
STL
-
BUF
7h 00m
1 stop
$282Southwest
Mon, Apr 20 - Wed, Apr 22
American Airlines Logo
4:04 pm - 8:16 pm
BUF
-
STL
5h 12m
1 stop
American Airlines Logo
6:00 am - 11:49 am
STL
-
BUF
4h 49m
1 stop
$287American Airlines
Wed, Apr 1 - Mon, Apr 6
Southwest Logo
4:00 pm - 11:15 pm
BUF
-
STL
8h 15m
2 stops
Southwest Logo
2:30 pm - 10:15 pm
STL
-
BUF
6h 45m
2 stops
$292Southwest
Mon, Apr 20 - Wed, Apr 22
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
$307Frontier
Sun, Mar 8 - Thu, Mar 12
American Airlines Logo
5:59 pm - 11:44 pm
BUF
-
STL
6h 45m
1 stop
American Airlines Logo
6:40 pm - 11:40 pm
STL
-
BUF
4h 00m
1 stop
$311American Airlines
Mon, Mar 16 - Fri, Mar 20
American Airlines Logo
5:29 pm - 9:21 pm
BUF
-
STL
4h 52m
1 stop
American Airlines Logo
6:00 am - 11:49 am
STL
-
BUF
4h 49m
1 stop
$312American Airlines
Mon, Mar 16 - Fri, Mar 20

Frontier flights from Buffalo to St. Louis

Our best Frontier deals on Buffalo to St. Louis flight tickets
Frontier
Apr 8
BUF1:02 pmBuffalo
11h 23m
2 stops
STL11:25 pmLambert-St Louis
Apr 15
STL8:23 pmLambert-St Louis
14h 17m
1 stop
BUF11:40 amBuffalo
$212
Frontier
Mar 7
BUF9:25 pmBuffalo
39h 54m
2 stops
STL12:19 pmLambert-St Louis
Mar 18
STL11:32 amLambert-St Louis
23h 33m
1 stop
BUF12:05 pmBuffalo
$250
Frontier
Mar 3
BUF7:17 pmBuffalo
28h 10m
1 stop
STL10:27 pmLambert-St Louis
Mar 6
STL4:21 pmLambert-St Louis
17h 28m
1 stop
BUF10:49 amBuffalo
$257

American Airlines flights from Buffalo to St. Louis

Our best American Airlines deals on Buffalo to St. Louis flight tickets
American Airlines
Apr 1
BUF4:04 pmBuffalo
5h 12m
1 stop
STL8:16 pmLambert-St Louis
Apr 6
STL6:00 amLambert-St Louis
4h 49m
1 stop
BUF11:49 amBuffalo
$287
American Airlines
Mar 16
BUF5:59 pmBuffalo
6h 45m
1 stop
STL11:44 pmLambert-St Louis
Mar 20
STL6:40 pmLambert-St Louis
4h 00m
1 stop
BUF11:40 pmBuffalo
$311
American Airlines
Mar 16
BUF5:29 pmBuffalo
4h 52m
1 stop
STL9:21 pmLambert-St Louis
Mar 20
STL6:00 amLambert-St Louis
4h 49m
1 stop
BUF11:49 amBuffalo
$312

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 22, 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

Wed 4/8

1:02 pm-11:25 pm

2 stops11h 23m

Lambert-St Louis

Wed 4/15

8:23 pm-11:40 am

1 stop14h 17m

$212

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Sat 3/7

9:25 pm-12:19 pm

2 stops39h 54m

Lambert-St Louis

Wed 3/18

11:32 am-12:05 pm

1 stop23h 33m

$250

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Wed 3/11

10:23 am-4:31 pm

1 stop7h 08m

Lambert-St Louis

Wed 3/18

6:10 am-2:19 pm

1 stop7h 09m

$257

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Sat 3/7

7:41 pm-7:10 pm

1 stop24h 29m

Lambert-St Louis

Wed 3/18

4:51 pm-10:49 am

1 stop16h 58m

$271

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Mon 4/20

5:20 pm-11:25 pm

1 stop7h 05m

Lambert-St Louis

Wed 4/22

6:35 am-2:35 pm

1 stop7h 00m

$282

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Wed 4/1

4:04 pm-8:16 pm

1 stop5h 12m

Lambert-St Louis

Mon 4/6

6:00 am-11:49 am

1 stop4h 49m

$287

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Mon 4/20

4:00 pm-11:15 pm

2 stops8h 15m

Lambert-St Louis

Wed 4/22

2:30 pm-10:15 pm

2 stops6h 45m

$292

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Sun 3/8

1:00 pm-1:19 pm

1 stop25h 19m

Lambert-St Louis

Thu 3/12

9:05 pm-12:05 pm

2 stops14h 00m

$307

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Mon 3/16

5:59 pm-11:44 pm

1 stop6h 45m

Lambert-St Louis

Fri 3/20

6:40 pm-11:40 pm

1 stop4h 00m

$311

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Mon 3/16

5:29 pm-9:21 pm

1 stop4h 52m

Lambert-St Louis

Fri 3/20

6:00 am-11:49 am

1 stop4h 49m

$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 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 18m

Direct flights

None
The fastest flight from Buffalo to St. Louis takes 4h 18m
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 18m, 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
8,241 reviews
Search Delta flights
American AirlinesPriceFrom $236Free CancellationRating
7.2
11,338 reviews
Search American Airlines flights
SouthwestPriceFrom $317Free CancellationRating
8.0
4,299 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
St. Peters
Collinsville
Wentzville
Fenton
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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