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Cheap flights from Buffalo to St. Louis from $129

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 11/18. 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

Frontier Logo
7:41 pm - 8:37 pmBUF-STL
25h 56m1 stop
Frontier Logo
1:57 pm - 6:14 pmSTL-BUF
27h 17m1 stop
$174Frontier
Find Deal
jue., oct. 2 - dom., oct. 5
Frontier Logo
7:12 pm - 12:09 pmBUF-STL
17h 57m2 stops
Frontier Logo
7:45 pm - 11:44 amSTL-BUF
14h 59m2 stops
$235Frontier
Find Deal
sáb., nov. 1 - dom., nov. 2
American Airlines Logo
6:42 pm - 11:05 pmBUF-STL
5h 23m1 stop
American Airlines Logo
10:36 am - 6:18 pmSTL-BUF
6h 42m1 stop
$257American Airlines
Find Deal
mar., oct. 7 - mar., oct. 14
United Airlines Logo
7:07 am - 10:49 amBUF-STL
4h 42m1 stop
United Airlines Logo
6:30 am - 1:22 pmSTL-BUF
5h 52m1 stop
$277United Airlines
Find Deal
lun., oct. 20 - mar., oct. 21
United Airlines Logo
7:07 am - 10:49 amBUF-STL
4h 42m1 stop
United Airlines Logo
12:25 pm - 10:42 pmSTL-BUF
9h 17m2 stops
$282United Airlines
Find Deal
lun., oct. 20 - mar., oct. 21
Delta Logo
12:06 pm - 3:55 pmBUF-STL
4h 49m1 stop
Delta Logo
9:10 am - 4:47 pmSTL-BUF
6h 37m1 stop
$322Delta
Find Deal
mié., oct. 8 - dom., oct. 12
American Airlines Logo
6:07 am - 9:46 amBUF-STL
4h 39m1 stop
American Airlines Logo
6:08 pm - 11:42 pmSTL-BUF
4h 34m1 stop
$323American Airlines
Find Deal
mar., oct. 21 - jue., oct. 23
Delta Logo
6:16 am - 11:55 amBUF-STL
6h 39m1 stop
Delta Logo
6:45 am - 11:51 amSTL-BUF
4h 06m1 stop
$332Delta
Find Deal
jue., feb. 26 - dom., mar. 1
Southwest Logo
3:10 pm - 8:30 pmBUF-STL
6h 20m1 stop
Southwest Logo
5:35 am - 2:10 pmSTL-BUF
7h 35m2 stops
$337Southwest
Find Deal
lun., oct. 20 - mar., oct. 21
Southwest Logo
4:15 pm - 10:05 pmBUF-STL
6h 50m2 stops
Southwest Logo
6:30 am - 2:10 pmSTL-BUF
6h 40m2 stops
$352Southwest
Find Deal
mar., oct. 14 - mar., oct. 21

Delta flights from Buffalo to St. Louis

Our best Delta deals on Buffalo to St. Louis flight tickets
Delta
Oct 8
BUF12:06 pmBuffalo
4h 49m
1 stop
STL3:55 pmLambert-St Louis
Oct 12
STL9:10 amLambert-St Louis
6h 37m
1 stop
BUF4:47 pmBuffalo
$322
Find similar
Delta
Feb 26
BUF6:16 amBuffalo
6h 39m
1 stop
STL11:55 amLambert-St Louis
Mar 1
STL6:45 amLambert-St Louis
4h 06m
1 stop
BUF11:51 amBuffalo
$332
Find similar
Delta
Feb 26
BUF6:50 pmBuffalo
5h 50m
1 stop
STL11:40 pmLambert-St Louis
Mar 1
STL7:05 pmLambert-St Louis
14h 32m
2 stops
BUF10:37 amBuffalo
$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
Oct 7
BUF6:42 pmBuffalo
5h 23m
1 stop
STL11:05 pmLambert-St Louis
Oct 14
STL10:36 amLambert-St Louis
6h 42m
1 stop
BUF6:18 pmBuffalo
$257
Find similar
American Airlines
Oct 21
BUF6:07 amBuffalo
4h 39m
1 stop
STL9:46 amLambert-St Louis
Oct 23
STL6:08 pmLambert-St Louis
4h 34m
1 stop
BUF11:42 pmBuffalo
$323
Find similar
American Airlines
Nov 14
BUF11:26 amBuffalo
9h 53m
1 stop
STL8:19 pmLambert-St Louis
Nov 21
STL4:46 pmLambert-St Louis
5h 50m
1 stop
BUF11:36 pmBuffalo
$345
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 septiembre 18, 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

jue. 10/2

7:41 pm-8:37 pm

1 stop25h 56m

Lambert-St Louis

dom. 10/5

1:57 pm-6:14 pm

1 stop27h 17m

$174

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

sáb. 11/1

7:12 pm-12:09 pm

2 stops17h 57m

Lambert-St Louis

dom. 11/2

7:45 pm-11:44 am

2 stops14h 59m

$235

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

mar. 10/7

6:42 pm-11:05 pm

1 stop5h 23m

Lambert-St Louis

mar. 10/14

10:36 am-6:18 pm

1 stop6h 42m

$257

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

lun. 10/20

7:07 am-10:49 am

1 stop4h 42m

Lambert-St Louis

mar. 10/21

6:30 am-1:22 pm

1 stop5h 52m

$277

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

lun. 10/20

7:07 am-10:49 am

1 stop4h 42m

Lambert-St Louis

mar. 10/21

12:25 pm-10:42 pm

2 stops9h 17m

$282

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

mié. 10/8

12:06 pm-3:55 pm

1 stop4h 49m

Lambert-St Louis

dom. 10/12

9:10 am-4:47 pm

1 stop6h 37m

$322

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

mar. 10/21

6:07 am-9:46 am

1 stop4h 39m

Lambert-St Louis

jue. 10/23

6:08 pm-11:42 pm

1 stop4h 34m

$323

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

jue. 2/26

6:16 am-11:55 am

1 stop6h 39m

Lambert-St Louis

dom. 3/1

6:45 am-11:51 am

1 stop4h 06m

$332

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

lun. 10/20

3:10 pm-8:30 pm

1 stop6h 20m

Lambert-St Louis

mar. 10/21

5:35 am-2:10 pm

2 stops7h 35m

$337

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

mar. 10/14

4:15 pm-10:05 pm

2 stops6h 50m

Lambert-St Louis

mar. 10/21

6:30 am-2:10 pm

2 stops6h 40m

$352

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 $291. 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 far in advance should I book a flight to St. Louis?

You are more likely to see cheaper flights to St. Louis from Buffalo when booking weeks ahead of your departure date. In general, you can expect to find flights to St. Louis for around $356 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to St. Louis from Buffalo for as low as $256 on momondo.

How have Buffalo to St. Louis flight prices changed over time?

As of September 2025, prices for Buffalo to St. Louis flights are approximately 19% more expensive 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

Direct flights

None
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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  • 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 28m, 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
American AirlinesPriceFrom $236Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
DeltaPriceFrom $243Free CancellationRating
7.9
7,964 reviews
Search Delta flights
SouthwestPriceFrom $312Free CancellationRating
8.0
4,242 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
Florissant
Maryland Heights
O'Fallon
Fenton
Collinsville
Wentzville
Alton
St. Peters
Farmington
Festus
Glencoe
Clayton
Edwardsville
Eureka
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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sáb. 10/18
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