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Cheap flights from Buffalo to St. Louis from $102

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 12/8. 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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Cheap round-trip flights

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Southwest Logo
6:20 am - 11:15 amBUF-STL
5h 55m1 stop
Southwest Logo
6:50 am - 12:30 pmSTL-BUF
4h 40m1 stop
$154Southwest
Find Deal
mar., ene. 13 - mié., ene. 21
American Airlines Logo
4:17 pm - 11:12 pmBUF-STL
7h 55m2 stops
American Airlines Logo
6:44 pm - 11:48 pmSTL-BUF
4h 04m1 stop
$164American Airlines
Find Deal
mar., ene. 13 - mié., ene. 21
Frontier Logo
7:31 pm - 11:33 pmBUF-STL
29h 02m1 stop
Frontier Logo
5:42 pm - 7:04 pmSTL-BUF
24h 22m1 stop
$192Frontier
Find Deal
lun., feb. 2 - mié., feb. 4
Southwest Logo
5:50 am - 12:45 pmBUF-STL
7h 55m2 stops
Southwest Logo
11:35 am - 8:30 pmSTL-BUF
7h 55m2 stops
$194Southwest
Find Deal
mar., ene. 13 - mié., ene. 21
American Airlines Logo
5:16 pm - 9:15 pmBUF-STL
4h 59m1 stop
American Airlines Logo
6:00 am - 12:08 pmSTL-BUF
5h 08m1 stop
$210American Airlines
Find Deal
lun., feb. 2 - mié., feb. 4
American Airlines Logo
4:17 pm - 11:12 pmBUF-STL
7h 55m2 stops
American Airlines Logo
11:05 am - 4:35 pmSTL-BUF
4h 30m1 stop
$215American Airlines
Find Deal
lun., feb. 2 - mié., feb. 4
Southwest Logo
5:50 am - 12:45 pmBUF-STL
7h 55m2 stops
Southwest Logo
6:05 am - 3:10 pmSTL-BUF
8h 05m2 stops
$223Southwest
Find Deal
lun., feb. 2 - mié., feb. 4
Delta Logo
6:03 am - 9:39 amBUF-STL
4h 36m1 stop
Delta Logo
9:45 am - 5:04 pmSTL-BUF
6h 19m1 stop
$227Delta
Find Deal
dom., ene. 18 - jue., ene. 22
Frontier Logo
1:39 pm - 6:51 amBUF-STL
18h 12m1 stop
Frontier Logo
5:42 pm - 12:44 pmSTL-BUF
18h 02m2 stops
$235Frontier
Find Deal
jue., ene. 22 - dom., ene. 25
Frontier Logo
1:39 pm - 6:51 amBUF-STL
18h 12m1 stop
Frontier Logo
5:42 pm - 6:36 pmSTL-BUF
23h 54m1 stop
$247Frontier
Find Deal
jue., ene. 22 - dom., ene. 25

Frontier flights from Buffalo to St. Louis

Our best Frontier deals on Buffalo to St. Louis flight tickets
Frontier
Feb 2
BUF7:31 pmBuffalo
29h 02m
1 stop
STL11:33 pmLambert-St Louis
Feb 4
STL5:42 pmLambert-St Louis
24h 22m
1 stop
BUF7:04 pmBuffalo
$192
Find similar
Frontier
Jan 22
BUF1:39 pmBuffalo
18h 12m
1 stop
STL6:51 amLambert-St Louis
Jan 25
STL5:42 pmLambert-St Louis
18h 02m
2 stops
BUF12:44 pmBuffalo
$235
Find similar
Frontier
Jan 22
BUF1:39 pmBuffalo
18h 12m
1 stop
STL6:51 amLambert-St Louis
Jan 25
STL5:42 pmLambert-St Louis
23h 54m
1 stop
BUF6:36 pmBuffalo
$247
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 13
BUF4:17 pmBuffalo
7h 55m
2 stops
STL11:12 pmLambert-St Louis
Jan 21
STL6:44 pmLambert-St Louis
4h 04m
1 stop
BUF11:48 pmBuffalo
$164
Find similar
American Airlines
Feb 2
BUF5:16 pmBuffalo
4h 59m
1 stop
STL9:15 pmLambert-St Louis
Feb 4
STL6:00 amLambert-St Louis
5h 08m
1 stop
BUF12:08 pmBuffalo
$210
Find similar
American Airlines
Feb 2
BUF4:17 pmBuffalo
7h 55m
2 stops
STL11:12 pmLambert-St Louis
Feb 4
STL11:05 amLambert-St Louis
4h 30m
1 stop
BUF4:35 pmBuffalo
$215
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 diciembre 2, 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

mar. 1/13

6:20 am-11:15 am

1 stop5h 55m

Lambert-St Louis

mié. 1/21

6:50 am-12:30 pm

1 stop4h 40m

$154

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

mar. 1/13

4:17 pm-11:12 pm

2 stops7h 55m

Lambert-St Louis

mié. 1/21

6:44 pm-11:48 pm

1 stop4h 04m

$164

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

lun. 2/2

7:31 pm-11:33 pm

1 stop29h 02m

Lambert-St Louis

mié. 2/4

5:42 pm-7:04 pm

1 stop24h 22m

$192

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

mar. 1/13

5:50 am-12:45 pm

2 stops7h 55m

Lambert-St Louis

mié. 1/21

11:35 am-8:30 pm

2 stops7h 55m

$194

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

lun. 2/2

5:16 pm-9:15 pm

1 stop4h 59m

Lambert-St Louis

mié. 2/4

6:00 am-12:08 pm

1 stop5h 08m

$210

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

lun. 2/2

4:17 pm-11:12 pm

2 stops7h 55m

Lambert-St Louis

mié. 2/4

11:05 am-4:35 pm

1 stop4h 30m

$215

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

lun. 2/2

5:50 am-12:45 pm

2 stops7h 55m

Lambert-St Louis

mié. 2/4

6:05 am-3:10 pm

2 stops8h 05m

$223

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

dom. 1/18

6:03 am-9:39 am

1 stop4h 36m

Lambert-St Louis

jue. 1/22

9:45 am-5:04 pm

1 stop6h 19m

$227

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

jue. 1/22

1:39 pm-6:51 am

1 stop18h 12m

Lambert-St Louis

dom. 1/25

5:42 pm-12:44 pm

2 stops18h 02m

$235

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

jue. 1/22

1:39 pm-6:51 am

1 stop18h 12m

Lambert-St Louis

dom. 1/25

5:42 pm-6:36 pm

1 stop23h 54m

$247

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 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 $254 on momondo.

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

4h 14m

Direct flights

None
The fastest flight from Buffalo to St. Louis takes 4h 14m
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 4h 10m, 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
8,011 reviews
Search Delta flights
American AirlinesPriceFrom $243Free CancellationRating
7.2
11,045 reviews
Search American Airlines flights
United AirlinesPriceFrom $296Free CancellationRating
7.4
9,063 reviews
Search United Airlines flights
SouthwestPriceFrom $338Free CancellationRating
8.0
4,253 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
Collinsville
St. Peters
Alton
Farmington
Clayton
Festus
Glencoe
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.

An easier way to manage your St. Louis trip

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