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Cheap flights from Buffalo to St. Louis from $82

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 8/28. 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
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Buffalo to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
11:36 am - 5:22 pm
BUF
-
STL
6h 46m
1 stop
Frontier Logo
6:17 pm - 10:29 am
STL
-
BUF
15h 12m
1 stop
$162Frontier
Fri, Aug 28 - Mon, Aug 31
Frontier Logo
2:48 pm - 8:57 am
BUF
-
STL
19h 09m
1 stop
Frontier Logo
4:57 pm - 10:29 am
STL
-
BUF
16h 32m
1 stop
$184Frontier
Fri, Jul 31 - Sat, Aug 8
Frontier Logo
11:36 am - 5:22 pm
BUF
-
STL
6h 46m
1 stop
Frontier Logo
6:17 pm - 10:29 am
STL
-
BUF
15h 12m
1 stop
$194Frontier
Fri, Aug 28 - Sun, Aug 30
Frontier Logo
9:33 pm - 8:57 am
BUF
-
STL
36h 24m
2 stops
Frontier Logo
6:34 pm - 1:53 pm
STL
-
BUF
18h 19m
1 stop
$198Frontier
Thu, Aug 6 - Thu, Aug 13
Delta Logo
3:50 pm - 8:37 pm
BUF
-
STL
5h 47m
1 stop
Delta Logo
5:45 pm - 11:59 pm
STL
-
BUF
5h 14m
1 stop
$249Delta
Tue, Nov 10 - Fri, Nov 13
Frontier Logo
11:36 am - 5:50 pm
BUF
-
STL
31h 14m
2 stops
Frontier Logo
6:17 pm - 10:29 am
STL
-
BUF
15h 12m
1 stop
$250Frontier
Tue, Aug 18 - Sun, Aug 23
Frontier Logo
9:29 pm - 11:59 pm
BUF
-
STL
27h 30m
1 stop
Frontier Logo
4:09 pm - 7:06 pm
STL
-
BUF
25h 57m
1 stop
$258Frontier
Sun, Aug 2 - Sun, Aug 9
Frontier Logo
10:02 pm - 11:59 pm
BUF
-
STL
26h 57m
1 stop
Frontier Logo
4:09 pm - 7:06 pm
STL
-
BUF
25h 57m
1 stop
$263Frontier
Sat, Aug 1 - Tue, Aug 11
Frontier Logo
10:02 pm - 8:57 am
BUF
-
STL
35h 55m
2 stops
Frontier Logo
6:34 pm - 1:53 pm
STL
-
BUF
18h 19m
1 stop
$267Frontier
Sat, Aug 1 - Tue, Aug 11
Frontier Logo
2:48 pm - 2:56 pm
BUF
-
STL
25h 08m
2 stops
Frontier Logo
4:57 pm - 10:29 am
STL
-
BUF
16h 32m
1 stop
$268Frontier
Fri, Jul 31 - Sat, Aug 8

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United Airlines flights from Buffalo to St. Louis

Our best United Airlines deals on Buffalo to St. Louis flight tickets
United Airlines
Aug 25
BUF10:30 amBuffalo
6h 08m
1 stop
STL3:38 pmLambert-St Louis
Aug 26
STL9:30 amLambert-St Louis
6h 26m
1 stop
BUF4:56 pmBuffalo
$322
United Airlines
Aug 25
BUF10:30 amBuffalo
12h 30m
2 stops
STL10:00 pmLambert-St Louis
Aug 26
STL8:50 amLambert-St Louis
7h 06m
1 stop
BUF4:56 pmBuffalo
$348
United Airlines
Aug 25
BUF10:30 amBuffalo
6h 08m
1 stop
STL3:38 pmLambert-St Louis
Aug 26
STL9:30 amLambert-St Louis
6h 26m
1 stop
BUF4:56 pmBuffalo
$405

Frontier flights from Buffalo to St. Louis

Our best Frontier deals on Buffalo to St. Louis flight tickets
Frontier
Aug 28
BUF11:36 amBuffalo
6h 46m
1 stop
STL5:22 pmLambert-St Louis
Aug 31
STL6:17 pmLambert-St Louis
15h 12m
1 stop
BUF10:29 amBuffalo
$162
Frontier
Jul 31
BUF2:48 pmBuffalo
19h 09m
1 stop
STL8:57 amLambert-St Louis
Aug 8
STL4:57 pmLambert-St Louis
16h 32m
1 stop
BUF10:29 amBuffalo
$184
Frontier
Aug 28
BUF11:36 amBuffalo
6h 46m
1 stop
STL5:22 pmLambert-St Louis
Aug 30
STL6:17 pmLambert-St Louis
15h 12m
1 stop
BUF10:29 amBuffalo
$194

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 July 8, 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

Cheapest round-trip

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Fri 8/28

11:36 am-5:22 pm

1 stop6h 46m

Lambert-St Louis

Mon 8/31

6:17 pm-10:29 am

1 stop15h 12m

$162

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Fri 7/31

2:48 pm-8:57 am

1 stop19h 09m

Lambert-St Louis

Sat 8/8

4:57 pm-10:29 am

1 stop16h 32m

$184

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Fri 8/28

11:36 am-5:22 pm

1 stop6h 46m

Lambert-St Louis

Sun 8/30

6:17 pm-10:29 am

1 stop15h 12m

$194

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Thu 8/6

9:33 pm-8:57 am

2 stops36h 24m

Lambert-St Louis

Thu 8/13

6:34 pm-1:53 pm

1 stop18h 19m

$198
Quickest round-trip

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Tue 11/10

3:50 pm-8:37 pm

1 stop5h 47m

Lambert-St Louis

Fri 11/13

5:45 pm-11:59 pm

1 stop5h 14m

$249

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Tue 8/18

11:36 am-5:50 pm

2 stops31h 14m

Lambert-St Louis

Sun 8/23

6:17 pm-10:29 am

1 stop15h 12m

$250

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Sun 8/2

9:29 pm-11:59 pm

1 stop27h 30m

Lambert-St Louis

Sun 8/9

4:09 pm-7:06 pm

1 stop25h 57m

$258

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Sat 8/1

10:02 pm-11:59 pm

1 stop26h 57m

Lambert-St Louis

Tue 8/11

4:09 pm-7:06 pm

1 stop25h 57m

$263

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Sat 8/1

10:02 pm-8:57 am

2 stops35h 55m

Lambert-St Louis

Tue 8/11

6:34 pm-1:53 pm

1 stop18h 19m

$267

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Fri 7/31

2:48 pm-2:56 pm

2 stops25h 08m

Lambert-St Louis

Sat 8/8

4:57 pm-10:29 am

1 stop16h 32m

$268

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, January 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 $321. The month of December is another great option to travel to St. Louis, with average flight prices from Buffalo averaging around $327.

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 22m

Direct flights

None
The fastest flight from Buffalo to St. Louis takes 4h 22m
There are no direct flights from Buffalo to St. Louis. There are no popular flight routes from Buffalo to St. Louis.
Search flight deals

Frequently asked questions about flying from Buffalo to St. Louis

  • 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 22m, 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
7.8
8,450 reviews
Search Delta flights
American AirlinesPriceFrom $236Free CancellationRating
7.1
11,783 reviews
Search American Airlines flights
SouthwestPriceFrom $317Free CancellationRating
7.9
4,249 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
Fairview Heights
Hermann
Maryland Heights
Florissant
St. Peters
O'Fallon
Collinsville
Alton
Farmington
Wentzville
Clayton
Fenton
Festus
Eureka
Litchfield
Edwardsville
Grafton
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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