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Cheap flights from Buffalo to St. Louis from $132

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 3/5. 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
7:31 pm - 11:33 pm
BUF
-
STL
29h 02m
1 stop
Frontier Logo
5:42 pm - 11:34 am
STL
-
BUF
16h 52m
1 stop
$204Frontier
Mon, Feb 2 - Fri, Feb 6
Delta Logo
5:44 pm - 8:43 pm
BUF
-
STL
3h 59m
1 stop
Delta Logo
5:01 pm - 11:26 pm
STL
-
BUF
5h 25m
1 stop
$257Delta
Wed, Feb 11 - Sat, Feb 14
Frontier Logo
9:25 pm - 5:57 am
BUF
-
STL
9h 32m
1 stop
Frontier Logo
4:51 pm - 10:49 am
STL
-
BUF
16h 58m
1 stop
$259Frontier
Sat, Mar 7 - Sun, Mar 8
American Airlines Logo
4:17 pm - 11:12 pm
BUF
-
STL
7h 55m
2 stops
American Airlines Logo
7:05 am - 12:55 pm
STL
-
BUF
4h 50m
1 stop
$262American Airlines
Wed, Feb 11 - Sat, Feb 14
Delta Logo
6:15 am - 9:32 am
BUF
-
STL
4h 17m
1 stop
Delta Logo
5:50 pm - 10:57 pm
STL
-
BUF
4h 07m
1 stop
$282Delta
Sat, Feb 21 - Mon, Feb 23
Frontier Logo
12:20 pm - 11:59 pm
BUF
-
STL
12h 39m
2 stops
Frontier Logo
3:49 pm - 6:21 pm
STL
-
BUF
25h 32m
1 stop
$285Frontier
Sat, Feb 21 - Mon, Feb 23
Frontier Logo
1:02 pm - 10:30 am
BUF
-
STL
22h 28m
1 stop
Frontier Logo
11:21 am - 12:17 pm
STL
-
BUF
23h 56m
1 stop
$293Frontier
Wed, Apr 1 - Sun, Apr 5
Delta Logo
6:00 am - 11:09 am
BUF
-
STL
6h 09m
1 stop
Delta Logo
5:59 pm - 10:55 pm
STL
-
BUF
3h 56m
1 stop
$307Delta
Wed, Mar 11 - Mon, Mar 16
Frontier Logo
1:02 pm - 10:30 am
BUF
-
STL
22h 28m
1 stop
Frontier Logo
4:54 pm - 12:17 pm
STL
-
BUF
18h 23m
2 stops
$311Frontier
Wed, Apr 1 - Sun, Apr 5
Frontier Logo
7:31 pm - 11:33 pm
BUF
-
STL
29h 02m
1 stop
Frontier Logo
8:22 pm - 10:07 am
STL
-
BUF
36h 45m
2 stops
$315Frontier
Mon, Feb 2 - Fri, Feb 6

Frontier flights from Buffalo to St. Louis

Our best Frontier deals on Buffalo to St. Louis flight tickets
Frontier
Feb 2
BUF7:31 pmBuffalo
29h 02m
1 stop
STL11:33 pmLambert-St Louis
Feb 6
STL5:42 pmLambert-St Louis
16h 52m
1 stop
BUF11:34 amBuffalo
$204
Frontier
Mar 7
BUF9:25 pmBuffalo
9h 32m
1 stop
STL5:57 amLambert-St Louis
Mar 8
STL4:51 pmLambert-St Louis
16h 58m
1 stop
BUF10:49 amBuffalo
$259
Frontier
Jan 24
BUF12:29 pmBuffalo
12h 04m
1 stop
STL11:33 pmLambert-St Louis
Jan 26
STL10:16 amLambert-St Louis
7h 20m
1 stop
BUF6:36 pmBuffalo
$282

Delta flights from Buffalo to St. Louis

Our best Delta deals on Buffalo to St. Louis flight tickets
Delta
Feb 11
BUF5:44 pmBuffalo
3h 59m
1 stop
STL8:43 pmLambert-St Louis
Feb 14
STL5:01 pmLambert-St Louis
5h 25m
1 stop
BUF11:26 pmBuffalo
$257
Delta
Feb 21
BUF6:15 amBuffalo
4h 17m
1 stop
STL9:32 amLambert-St Louis
Feb 23
STL5:50 pmLambert-St Louis
4h 07m
1 stop
BUF10:57 pmBuffalo
$282
Delta
Mar 11
BUF6:00 amBuffalo
6h 09m
1 stop
STL11:09 amLambert-St Louis
Mar 16
STL5:59 pmLambert-St Louis
3h 56m
1 stop
BUF10:55 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 January 20, 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 2/2

7:31 pm-11:33 pm

1 stop29h 02m

Lambert-St Louis

Fri 2/6

5:42 pm-11:34 am

1 stop16h 52m

$204

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Wed 2/11

5:44 pm-8:43 pm

1 stop3h 59m

Lambert-St Louis

Sat 2/14

5:01 pm-11:26 pm

1 stop5h 25m

$257

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

$259

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Wed 2/11

4:17 pm-11:12 pm

2 stops7h 55m

Lambert-St Louis

Sat 2/14

7:05 am-12:55 pm

1 stop4h 50m

$262

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Sat 2/21

6:15 am-9:32 am

1 stop4h 17m

Lambert-St Louis

Mon 2/23

5:50 pm-10:57 pm

1 stop4h 07m

$282

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Sat 2/21

12:20 pm-11:59 pm

2 stops12h 39m

Lambert-St Louis

Mon 2/23

3:49 pm-6:21 pm

1 stop25h 32m

$285

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Wed 4/1

1:02 pm-10:30 am

1 stop22h 28m

Lambert-St Louis

Sun 4/5

11:21 am-12:17 pm

1 stop23h 56m

$293

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Wed 3/11

6:00 am-11:09 am

1 stop6h 09m

Lambert-St Louis

Mon 3/16

5:59 pm-10:55 pm

1 stop3h 56m

$307

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Wed 4/1

1:02 pm-10:30 am

1 stop22h 28m

Lambert-St Louis

Sun 4/5

4:54 pm-12:17 pm

2 stops18h 23m

$311

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Mon 2/2

7:31 pm-11:33 pm

1 stop29h 02m

Lambert-St Louis

Fri 2/6

8:22 pm-10:07 am

2 stops36h 45m

$315

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

5h 20m

Direct flights

None
The fastest flight from Buffalo to St. Louis takes 5h 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 5h 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
8,076 reviews
Search Delta flights
American AirlinesPriceFrom $243Free CancellationRating
7.2
11,164 reviews
Search American Airlines flights
United AirlinesPriceFrom $316Free CancellationRating
7.4
9,180 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
Fenton
Collinsville
St. Peters
Wentzville
Alton
Farmington
Clayton
Eureka
Edwardsville
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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