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Cheap flights from Buffalo to St. Louis from $96

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 1/29. 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
6:33 pm - 8:40 am
BUF
-
STL
15h 07m1 stop
Frontier Logo
8:32 pm - 6:19 pm
STL
-
BUF
20h 47m1 stop
$219Frontier
Sat, Jan 10 - Sat, Jan 17
Delta Logo
6:03 am - 9:39 am
BUF
-
STL
4h 36m1 stop
Delta Logo
9:59 am - 5:54 pm
STL
-
BUF
6h 55m1 stop
$223Delta
Sun, Jan 18 - Tue, Jan 20
Frontier Logo
6:33 pm - 2:48 pm
BUF
-
STL
21h 15m2 stops
Frontier Logo
8:32 pm - 6:19 pm
STL
-
BUF
20h 47m1 stop
$231Frontier
Sat, Jan 10 - Sat, Jan 17
American Airlines Logo
8:00 am - 3:04 pm
BUF
-
STL
8h 04m2 stops
American Airlines Logo
6:46 pm - 11:48 pm
STL
-
BUF
4h 02m1 stop
$282American Airlines
Sun, Jan 18 - Tue, Jan 20
Frontier Logo
11:42 am - 10:33 pm
BUF
-
STL
11h 51m1 stop
Frontier Logo
10:42 am - 12:42 pm
STL
-
BUF
25h 00m1 stop
$285Frontier
Thu, Apr 9 - Sun, Apr 12
Frontier Logo
1:15 pm - 10:34 pm
BUF
-
STL
34h 19m2 stops
Frontier Logo
8:39 am - 8:03 pm
STL
-
BUF
10h 24m1 stop
$289Frontier
Mon, Jan 12 - Mon, Jan 19
Frontier Logo
9:25 pm - 7:07 am
BUF
-
STL
10h 42m1 stop
Frontier Logo
7:42 am - 8:30 pm
STL
-
BUF
11h 48m1 stop
$297Frontier
Fri, Mar 6 - Sun, Mar 8
Frontier Logo
1:39 pm - 11:33 pm
BUF
-
STL
34h 54m2 stops
Frontier Logo
5:42 pm - 6:36 pm
STL
-
BUF
23h 54m1 stop
$303Frontier
Thu, Jan 29 - Thu, Feb 5
Delta Logo
6:03 am - 9:39 am
BUF
-
STL
4h 36m1 stop
Delta Logo
6:25 am - 2:10 pm
STL
-
BUF
6h 45m1 stop
$312Delta
Sun, Jan 11 - Tue, Jan 13
Frontier Logo
9:08 am - 10:33 pm
BUF
-
STL
14h 25m1 stop
Frontier Logo
8:39 am - 8:03 pm
STL
-
BUF
10h 24m1 stop
$316Frontier
Mon, Jan 12 - Mon, Jan 19

Delta flights from Buffalo to St. Louis

Our best Delta deals on Buffalo to St. Louis flight tickets
Delta
Jan 18
BUF6:03 amBuffalo
4h 36m
1 stop
STL9:39 amLambert-St Louis
Jan 20
STL9:59 amLambert-St Louis
6h 55m
1 stop
BUF5:54 pmBuffalo
$223
Find similar
Delta
Jan 11
BUF6:03 amBuffalo
4h 36m
1 stop
STL9:39 amLambert-St Louis
Jan 13
STL6:25 amLambert-St Louis
6h 45m
1 stop
BUF2:10 pmBuffalo
$312
Find similar
Delta
Dec 26
BUF5:52 pmBuffalo
3h 49m
1 stop
STL8:41 pmLambert-St Louis
Jan 1
STL5:55 pmLambert-St Louis
3h 38m
1 stop
BUF10:33 pmBuffalo
$400
Find similar

American Airlines flights from Buffalo to St. Louis

Our best American Airlines deals on Buffalo to St. Louis flight tickets
American Airlines
Jan 18
BUF8:00 amBuffalo
8h 04m
2 stops
STL3:04 pmLambert-St Louis
Jan 20
STL6:46 pmLambert-St Louis
4h 02m
1 stop
BUF11:48 pmBuffalo
$282
Find similar
American Airlines
Jan 11
BUF8:00 amBuffalo
8h 04m
2 stops
STL3:04 pmLambert-St Louis
Jan 13
STL5:59 pmLambert-St Louis
4h 43m
1 stop
BUF11:42 pmBuffalo
$341
Find similar
American Airlines
Jan 11
BUF8:00 amBuffalo
8h 04m
2 stops
STL3:04 pmLambert-St Louis
Jan 13
STL9:54 amLambert-St Louis
6h 03m
1 stop
BUF4:57 pmBuffalo
$344
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 15, 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

Sat 1/10

6:33 pm-8:40 am

1 stop15h 07m

Lambert-St Louis

Sat 1/17

8:32 pm-6:19 pm

1 stop20h 47m

$219

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Sun 1/18

6:03 am-9:39 am

1 stop4h 36m

Lambert-St Louis

Tue 1/20

9:59 am-5:54 pm

1 stop6h 55m

$223

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Sat 1/10

6:33 pm-2:48 pm

2 stops21h 15m

Lambert-St Louis

Sat 1/17

8:32 pm-6:19 pm

1 stop20h 47m

$231

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Sun 1/18

8:00 am-3:04 pm

2 stops8h 04m

Lambert-St Louis

Tue 1/20

6:46 pm-11:48 pm

1 stop4h 02m

$282

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Thu 4/9

11:42 am-10:33 pm

1 stop11h 51m

Lambert-St Louis

Sun 4/12

10:42 am-12:42 pm

1 stop25h 00m

$285

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Mon 1/12

1:15 pm-10:34 pm

2 stops34h 19m

Lambert-St Louis

Mon 1/19

8:39 am-8:03 pm

1 stop10h 24m

$289

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Fri 3/6

9:25 pm-7:07 am

1 stop10h 42m

Lambert-St Louis

Sun 3/8

7:42 am-8:30 pm

1 stop11h 48m

$297

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Thu 1/29

1:39 pm-11:33 pm

2 stops34h 54m

Lambert-St Louis

Thu 2/5

5:42 pm-6:36 pm

1 stop23h 54m

$303

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Sun 1/11

6:03 am-9:39 am

1 stop4h 36m

Lambert-St Louis

Tue 1/13

6:25 am-2:10 pm

1 stop6h 45m

$312

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Mon 1/12

9:08 am-10:33 pm

1 stop14h 25m

Lambert-St Louis

Mon 1/19

8:39 am-8:03 pm

1 stop10h 24m

$316

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.

What is the cheapest day to depart on your flight to St. Louis?

The cheapest day to depart on your flight to St. Louis is on a Wednesday when prices can be found for as low as $326. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Monday because tickets tend to average around $486. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.

What is the cheapest time of day to depart on your flight to St. Louis?

Flying to St. Louis from Buffalo at noon is the least expensive time of day to depart. momondo users have found prices as low as $328 when looking at flights departing at noon. In the evening is when there is more demand to fly to St. Louis, so prices are often more expensive at around $416 per ticket.

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

3h 49m

Direct flights

None
The fastest flight from Buffalo to St. Louis takes 3h 49m
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 3h 49m, 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
8,007 reviews
Search Delta flights
American AirlinesPriceFrom $243Free CancellationRating
7.2
11,052 reviews
Search American Airlines flights
United AirlinesPriceFrom $296Free CancellationRating
7.4
9,092 reviews
Search United Airlines flights
SouthwestPriceFrom $338Free CancellationRating
7.9
4,250 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
Wentzville
St. Peters
Collinsville
Alton
Clayton
Festus
Glencoe
Farmington
Eureka
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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