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Cheap flights from Buffalo to St. Louis from $101

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 6/16. 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
2:49 pm - 8:55 am
BUF
-
STL
19h 06m
1 stop
Frontier Logo
5:27 pm - 10:41 am
STL
-
BUF
16h 14m
1 stop
$172Frontier
Fri, May 29 - Mon, Jun 1
Frontier Logo
2:49 pm - 8:55 am
BUF
-
STL
19h 06m
1 stop
Frontier Logo
5:27 pm - 11:33 am
STL
-
BUF
17h 06m
1 stop
$175Frontier
Fri, May 8 - Fri, May 15
Frontier Logo
11:36 am - 5:33 pm
BUF
-
STL
6h 57m
1 stop
Frontier Logo
11:38 am - 6:59 pm
STL
-
BUF
6h 21m
1 stop
$180Frontier
Thu, May 28 - Mon, Jun 1
Frontier Logo
7:52 pm - 11:57 pm
BUF
-
STL
29h 05m
1 stop
Frontier Logo
4:19 pm - 6:59 pm
STL
-
BUF
25h 40m
1 stop
$196Frontier
Fri, May 22 - Mon, May 25
Frontier Logo
8:21 pm - 5:36 pm
BUF
-
STL
22h 15m
2 stops
Frontier Logo
5:27 pm - 11:33 am
STL
-
BUF
17h 06m
1 stop
$204Frontier
Mon, May 4 - Fri, May 8
Frontier Logo
1:08 pm - 11:19 pm
BUF
-
STL
11h 11m
2 stops
Frontier Logo
8:23 pm - 11:37 am
STL
-
BUF
14h 14m
1 stop
$207Frontier
Thu, Apr 30 - Sat, May 2
Frontier Logo
1:08 pm - 6:50 am
BUF
-
STL
18h 42m
1 stop
Frontier Logo
8:23 pm - 11:37 am
STL
-
BUF
14h 14m
1 stop
$214Frontier
Thu, Apr 30 - Sat, May 2
Frontier Logo
11:36 am - 4:54 pm
BUF
-
STL
6h 18m
1 stop
Frontier Logo
6:33 pm - 1:54 pm
STL
-
BUF
18h 21m
1 stop
$216Frontier
Thu, May 14 - Tue, May 19
Frontier Logo
11:36 am - 8:55 am
BUF
-
STL
22h 19m
1 stop
Frontier Logo
6:33 pm - 1:54 pm
STL
-
BUF
18h 21m
1 stop
$224Frontier
Tue, May 5 - Tue, May 12
Frontier Logo
11:36 am - 5:33 pm
BUF
-
STL
6h 57m
1 stop
Frontier Logo
4:19 pm - 6:59 pm
STL
-
BUF
25h 40m
1 stop
$236Frontier
Thu, May 28 - Sun, May 31

Frontier flights from Buffalo to St. Louis

Our best Frontier deals on Buffalo to St. Louis flight tickets
Frontier
May 29
BUF2:49 pmBuffalo
19h 06m
1 stop
STL8:55 amLambert-St Louis
Jun 1
STL5:27 pmLambert-St Louis
16h 14m
1 stop
BUF10:41 amBuffalo
$172
Frontier
May 8
BUF2:49 pmBuffalo
19h 06m
1 stop
STL8:55 amLambert-St Louis
May 15
STL5:27 pmLambert-St Louis
17h 06m
1 stop
BUF11:33 amBuffalo
$175
Frontier
May 28
BUF11:36 amBuffalo
6h 57m
1 stop
STL5:33 pmLambert-St Louis
Jun 1
STL11:38 amLambert-St Louis
6h 21m
1 stop
BUF6:59 pmBuffalo
$180

United Airlines flights from Buffalo to St. Louis

Our best United Airlines deals on Buffalo to St. Louis flight tickets
United Airlines
Apr 30
BUF11:02 amBuffalo
6h 37m
1 stop
STL4:39 pmLambert-St Louis
May 2
STL10:25 amLambert-St Louis
7h 10m
2 stops
BUF6:35 pmBuffalo
$404
United Airlines
Apr 29
BUF2:54 pmBuffalo
10h 03m
2 stops
STL11:57 pmLambert-St Louis
Apr 30
STL9:14 amLambert-St Louis
6h 40m
1 stop
BUF4:54 pmBuffalo
$423
United Airlines
Apr 23
BUF6:02 pmBuffalo
4h 11m
1 stop
STL9:13 pmLambert-St Louis
Apr 27
STL8:30 amLambert-St Louis
4h 47m
1 stop
BUF2:17 pmBuffalo
$467

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 April 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

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Fri 5/29

2:49 pm-8:55 am

1 stop19h 06m

Lambert-St Louis

Mon 6/1

5:27 pm-10:41 am

1 stop16h 14m

$172

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Fri 5/8

2:49 pm-8:55 am

1 stop19h 06m

Lambert-St Louis

Fri 5/15

5:27 pm-11:33 am

1 stop17h 06m

$175
Quickest round-trip

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Thu 5/28

11:36 am-5:33 pm

1 stop6h 57m

Lambert-St Louis

Mon 6/1

11:38 am-6:59 pm

1 stop6h 21m

$180

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Fri 5/22

7:52 pm-11:57 pm

1 stop29h 05m

Lambert-St Louis

Mon 5/25

4:19 pm-6:59 pm

1 stop25h 40m

$196

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Mon 5/4

8:21 pm-5:36 pm

2 stops22h 15m

Lambert-St Louis

Fri 5/8

5:27 pm-11:33 am

1 stop17h 06m

$204

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Thu 4/30

1:08 pm-11:19 pm

2 stops11h 11m

Lambert-St Louis

Sat 5/2

8:23 pm-11:37 am

1 stop14h 14m

$207

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Thu 4/30

1:08 pm-6:50 am

1 stop18h 42m

Lambert-St Louis

Sat 5/2

8:23 pm-11:37 am

1 stop14h 14m

$214

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Thu 5/14

11:36 am-4:54 pm

1 stop6h 18m

Lambert-St Louis

Tue 5/19

6:33 pm-1:54 pm

1 stop18h 21m

$216

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Tue 5/5

11:36 am-8:55 am

1 stop22h 19m

Lambert-St Louis

Tue 5/12

6:33 pm-1:54 pm

1 stop18h 21m

$224

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Thu 5/28

11:36 am-5:33 pm

1 stop6h 57m

Lambert-St Louis

Sun 5/31

4:19 pm-6:59 pm

1 stop25h 40m

$236

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 30m

Direct flights

None
The fastest flight from Buffalo to St. Louis takes 4h 30m
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 30m, 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
8,408 reviews
Search Delta flights
American AirlinesPriceFrom $236Free CancellationRating
7.1
11,572 reviews
Search American Airlines flights
SouthwestPriceFrom $317Free CancellationRating
8.0
4,335 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 $456 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
Clayton
Festus
Eureka
Edwardsville
Litchfield
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.

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