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Cheap flights from Buffalo to St. Louis from $63

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 8/27. 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
12:05 pm - 5:30 pm
BUF
-
STL
6h 25m
1 stop
Frontier Logo
5:06 pm - 10:40 am
STL
-
BUF
16h 34m
1 stop
$123Frontier
Tue, Jun 9 - Wed, Jun 10
Frontier Logo
12:05 pm - 5:30 pm
BUF
-
STL
6h 25m
1 stop
Frontier Logo
5:06 pm - 10:40 am
STL
-
BUF
16h 34m
1 stop
$124Frontier
Tue, Jun 9 - Wed, Jun 10
Frontier Logo
2:50 pm - 8:52 am
BUF
-
STL
19h 02m
1 stop
Frontier Logo
6:31 pm - 1:55 pm
STL
-
BUF
18h 24m
1 stop
$126Frontier
Fri, Jun 19 - Sun, Jun 21
Frontier Logo
11:35 am - 5:30 pm
BUF
-
STL
6h 55m
1 stop
Frontier Logo
6:33 pm - 1:53 pm
STL
-
BUF
18h 20m
1 stop
$133Frontier
Thu, Jul 2 - Sun, Jul 5
Frontier Logo
11:35 am - 5:30 pm
BUF
-
STL
6h 55m
1 stop
Frontier Logo
4:52 pm - 10:54 am
STL
-
BUF
17h 02m
1 stop
$150Frontier
Thu, Jul 2 - Mon, Jul 6
Frontier Logo
12:05 pm - 5:30 pm
BUF
-
STL
6h 25m
1 stop
Frontier Logo
6:31 pm - 1:55 pm
STL
-
BUF
18h 24m
1 stop
$159Frontier
Tue, Jun 9 - Tue, Jun 16
Frontier Logo
2:50 pm - 5:30 pm
BUF
-
STL
27h 40m
1 stop
Frontier Logo
6:31 pm - 1:55 pm
STL
-
BUF
18h 24m
1 stop
$162Frontier
Wed, Jun 17 - Sun, Jun 21
Frontier Logo
2:49 pm - 5:33 pm
BUF
-
STL
27h 44m
1 stop
Frontier Logo
6:31 pm - 1:55 pm
STL
-
BUF
18h 24m
1 stop
$168Frontier
Mon, Jun 1 - Tue, Jun 9
Frontier Logo
2:49 pm - 8:55 am
BUF
-
STL
19h 06m
1 stop
Frontier Logo
5:06 pm - 11:34 am
STL
-
BUF
17h 28m
1 stop
$202Frontier
Fri, Jun 5 - Fri, Jun 12
Frontier Logo
11:36 am - 8:55 am
BUF
-
STL
22h 19m
1 stop
Frontier Logo
6:31 pm - 1:55 pm
STL
-
BUF
18h 24m
1 stop
$203Frontier
Sun, Jun 7 - Sun, Jun 14

United Airlines flights from Buffalo to St. Louis

Our best United Airlines deals on Buffalo to St. Louis flight tickets
United Airlines
Jun 1
BUF7:00 pmBuffalo
5h 35m
1 stop
STL11:35 pmLambert-St Louis
Jun 3
STL1:13 pmLambert-St Louis
6h 50m
1 stop
BUF9:03 pmBuffalo
$401
United Airlines
May 23
BUF6:00 amBuffalo
6h 41m
1 stop
STL11:41 amLambert-St Louis
May 27
STL11:25 amLambert-St Louis
10h 06m
2 stops
BUF10:31 pmBuffalo
$487
United Airlines
May 23
BUF10:34 amBuffalo
9h 49m
2 stops
STL7:23 pmLambert-St Louis
May 27
STL11:25 amLambert-St Louis
10h 06m
2 stops
BUF10:31 pmBuffalo
$492

Delta flights from Buffalo to St. Louis

Our best Delta deals on Buffalo to St. Louis flight tickets
Delta
Jun 18
BUF6:03 amBuffalo
6h 46m
1 stop
STL11:49 amLambert-St Louis
Jun 22
STL6:10 pmLambert-St Louis
4h 53m
1 stop
BUF12:03 amBuffalo
$321
Delta
Sep 15
BUF9:00 amBuffalo
5h 17m
1 stop
STL1:17 pmLambert-St Louis
Sep 18
STL5:30 pmLambert-St Louis
5h 28m
1 stop
BUF11:58 pmBuffalo
$352
Delta
May 23
BUF5:26 pmBuffalo
5h 12m
1 stop
STL9:38 pmLambert-St Louis
May 27
STL9:30 amLambert-St Louis
6h 31m
1 stop
BUF5:01 pmBuffalo
$402

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 May 11, 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
Quickest round-trip

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Tue 6/9

12:05 pm-5:30 pm

1 stop6h 25m

Lambert-St Louis

Wed 6/10

5:06 pm-10:40 am

1 stop16h 34m

$123

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Tue 6/9

12:05 pm-5:30 pm

1 stop6h 25m

Lambert-St Louis

Wed 6/10

5:06 pm-10:40 am

1 stop16h 34m

$124

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Fri 6/19

2:50 pm-8:52 am

1 stop19h 02m

Lambert-St Louis

Sun 6/21

6:31 pm-1:55 pm

1 stop18h 24m

$126

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Thu 7/2

11:35 am-5:30 pm

1 stop6h 55m

Lambert-St Louis

Sun 7/5

6:33 pm-1:53 pm

1 stop18h 20m

$133

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Thu 7/2

11:35 am-5:30 pm

1 stop6h 55m

Lambert-St Louis

Mon 7/6

4:52 pm-10:54 am

1 stop17h 02m

$150

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Tue 6/9

12:05 pm-5:30 pm

1 stop6h 25m

Lambert-St Louis

Tue 6/16

6:31 pm-1:55 pm

1 stop18h 24m

$159

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Wed 6/17

2:50 pm-5:30 pm

1 stop27h 40m

Lambert-St Louis

Sun 6/21

6:31 pm-1:55 pm

1 stop18h 24m

$162

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Mon 6/1

2:49 pm-5:33 pm

1 stop27h 44m

Lambert-St Louis

Tue 6/9

6:31 pm-1:55 pm

1 stop18h 24m

$168

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Fri 6/5

2:49 pm-8:55 am

1 stop19h 06m

Lambert-St Louis

Fri 6/12

5:06 pm-11:34 am

1 stop17h 28m

$202

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Sun 6/7

11:36 am-8:55 am

1 stop22h 19m

Lambert-St Louis

Sun 6/14

6:31 pm-1:55 pm

1 stop18h 24m

$203

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, December 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 $319. The month of January is another great option to travel to St. Louis, with average flight prices from Buffalo averaging around $321.

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 00m

Direct flights

None
The fastest flight from Buffalo to St. Louis takes 4h 00m
There are no direct flights from Buffalo to St. Louis. There are no popular flight routes from Buffalo to St. Louis.
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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 00m, 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
8,451 reviews
Search Delta flights
American AirlinesPriceFrom $236Free CancellationRating
7.1
11,666 reviews
Search American Airlines flights
SouthwestPriceFrom $317Free CancellationRating
8.0
4,298 reviews
Search Southwest flights

  • Southwest Flights From Buffalo to St. Louis

    Southwest flight deals from Buffalo to St. Louis start from $317 round-trip. Over the 1 Southwest flight for this route in a normal week, average airfare is usually $406 round-trip - but some users have found much cheaper deals with momondo.

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
St. Peters
Collinsville
Wentzville
Alton
Fenton
Farmington
Festus
Clayton
Eureka
Litchfield
Edwardsville
Shrewsbury
Grafton

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.

An easier way to manage your St. Louis trip

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