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Cheap flights from Buffalo to St. Louis from $175

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Buffalo to St. Louis departing on 2/6. 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
7:31 pm - 11:11 am
BUF
-
STL
16h 40m1 stop
Frontier Logo
5:42 pm - 6:21 pm
STL
-
BUF
23h 39m1 stop
$175Frontier
Fri, Feb 6 - Mon, Feb 9
Frontier Logo
7:59 pm - 10:23 am
BUF
-
STL
15h 24m1 stop
Frontier Logo
5:42 pm - 6:36 pm
STL
-
BUF
23h 54m1 stop
$203Frontier
Thu, Feb 5 - Sun, Feb 8
Frontier Logo
7:17 pm - 10:27 pm
BUF
-
STL
28h 10m1 stop
Frontier Logo
4:51 pm - 10:49 am
STL
-
BUF
16h 58m1 stop
$219Frontier
Tue, Mar 3 - Sun, Mar 8
Delta Logo
6:00 am - 11:05 am
BUF
-
STL
6h 05m1 stop
Delta Logo
6:35 am - 11:45 am
STL
-
BUF
4h 10m1 stop
$223Delta
Sun, Jan 18 - Tue, Jan 20
Multiple Airlines Logo
12:00 pm - 11:59 pm
BUF
-
STL
12h 59m2 stops
Multiple Airlines Logo
3:49 pm - 10:49 am
STL
-
BUF
18h 00m1 stop
$226Multiple Airlines
Sat, Feb 28 - Thu, Mar 5
Frontier Logo
1:39 pm - 6:51 am
BUF
-
STL
18h 12m1 stop
Frontier Logo
3:49 pm - 11:34 am
STL
-
BUF
18h 45m1 stop
$232Frontier
Fri, Feb 27 - Wed, Mar 4
Frontier Logo
11:37 am - 11:59 pm
BUF
-
STL
13h 22m1 stop
Frontier Logo
3:49 pm - 11:34 am
STL
-
BUF
18h 45m1 stop
$235Frontier
Mon, Mar 2 - Wed, Mar 4
Frontier Logo
4:37 pm - 11:59 pm
BUF
-
STL
8h 22m1 stop
Frontier Logo
3:49 pm - 11:34 am
STL
-
BUF
18h 45m1 stop
$237Frontier
Sat, Feb 28 - Wed, Mar 4
American Airlines Logo
6:00 am - 10:51 am
BUF
-
STL
5h 51m1 stop
American Airlines Logo
6:46 pm - 11:48 pm
STL
-
BUF
4h 02m1 stop
$240American Airlines
Tue, Jan 20 - Tue, Jan 27
Frontier Logo
7:31 pm - 11:11 am
BUF
-
STL
16h 40m1 stop
Frontier Logo
8:22 pm - 6:21 pm
STL
-
BUF
20h 59m2 stops
$241Frontier
Fri, Feb 6 - Mon, Feb 9

Delta flights from Buffalo to St. Louis

Our best Delta deals on Buffalo to St. Louis flight tickets
Delta
Jan 18
BUF6:00 amBuffalo
6h 05m
1 stop
STL11:05 amLambert-St Louis
Jan 20
STL6:35 amLambert-St Louis
4h 10m
1 stop
BUF11:45 amBuffalo
$223
Find similar
Delta
Mar 3
BUF6:00 amBuffalo
6h 02m
1 stop
STL11:02 amLambert-St Louis
Mar 4
STL6:35 amLambert-St Louis
4h 08m
1 stop
BUF11:43 amBuffalo
$257
Find similar
Delta
Feb 28
BUF12:25 pmBuffalo
5h 17m
1 stop
STL4:42 pmLambert-St Louis
Mar 2
STL6:35 amLambert-St Louis
4h 08m
1 stop
BUF11:43 amBuffalo
$282
Find similar

United Airlines flights from Buffalo to St. Louis

Our best United Airlines deals on Buffalo to St. Louis flight tickets
United Airlines
Jan 18
BUF6:00 amBuffalo
9h 30m
2 stops
STL2:30 pmLambert-St Louis
Jan 20
STL3:11 pmLambert-St Louis
4h 18m
1 stop
BUF8:29 pmBuffalo
$315
Find similar
United Airlines
Feb 28
BUF6:25 pmBuffalo
6h 40m
1 stop
STL12:05 amLambert-St Louis
Mar 3
STL7:41 amLambert-St Louis
12h 21m
2 stops
BUF9:02 pmBuffalo
$332
Find similar
United Airlines
Jan 20
BUF2:49 pmBuffalo
10h 10m
2 stops
STL11:59 pmLambert-St Louis
Jan 27
STL12:44 pmLambert-St Louis
8h 47m
2 stops
BUF10:31 pmBuffalo
$339
Find similar

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 December 30, 2025.
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 2/6

7:31 pm-11:11 am

1 stop16h 40m

Lambert-St Louis

Mon 2/9

5:42 pm-6:21 pm

1 stop23h 39m

$175

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Thu 2/5

7:59 pm-10:23 am

1 stop15h 24m

Lambert-St Louis

Sun 2/8

5:42 pm-6:36 pm

1 stop23h 54m

$203

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Tue 3/3

7:17 pm-10:27 pm

1 stop28h 10m

Lambert-St Louis

Sun 3/8

4:51 pm-10:49 am

1 stop16h 58m

$219

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Sun 1/18

6:00 am-11:05 am

1 stop6h 05m

Lambert-St Louis

Tue 1/20

6:35 am-11:45 am

1 stop4h 10m

$223

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Sat 2/28

12:00 pm-11:59 pm

2 stops12h 59m

Lambert-St Louis

Thu 3/5

3:49 pm-10:49 am

1 stop18h 00m

$226

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Fri 2/27

1:39 pm-6:51 am

1 stop18h 12m

Lambert-St Louis

Wed 3/4

3:49 pm-11:34 am

1 stop18h 45m

$232

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Mon 3/2

11:37 am-11:59 pm

1 stop13h 22m

Lambert-St Louis

Wed 3/4

3:49 pm-11:34 am

1 stop18h 45m

$235

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Sat 2/28

4:37 pm-11:59 pm

1 stop8h 22m

Lambert-St Louis

Wed 3/4

3:49 pm-11:34 am

1 stop18h 45m

$237

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Tue 1/20

6:00 am-10:51 am

1 stop5h 51m

Lambert-St Louis

Tue 1/27

6:46 pm-11:48 pm

1 stop4h 02m

$240

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Fri 2/6

7:31 pm-11:11 am

1 stop16h 40m

Lambert-St Louis

Mon 2/9

8:22 pm-6:21 pm

2 stops20h 59m

$241

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 18 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 December 2025, prices for Buffalo to St. Louis flights are approximately 55% cheaper 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 15m

Direct flights

None
The fastest flight from Buffalo to St. Louis takes 5h 15m
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 15m, 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
8,014 reviews
Search Delta flights
American AirlinesPriceFrom $243Free CancellationRating
7.2
11,074 reviews
Search American Airlines flights
United AirlinesPriceFrom $296Free CancellationRating
7.4
9,121 reviews
Search United Airlines flights
SouthwestPriceFrom $338Free CancellationRating
8.0
4,251 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
O'Fallon
Florissant
Fenton
Collinsville
St. Peters
Wentzville
Alton
Farmington
Clayton
Glencoe
Eureka
Festus
Edwardsville
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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