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Cheap flights from Buffalo to St. Louis from $79

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 1/31. 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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Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
7:14 pm - 6:51 amBUF-STL
12h 37m1 stop
Frontier Logo
8:32 pm - 6:19 pmSTL-BUF
20h 47m1 stop
$198Frontier
Find Deal
Thu, Jan 15 - Sat, Jan 17
Frontier Logo
7:14 pm - 6:51 amBUF-STL
12h 37m1 stop
Frontier Logo
5:11 pm - 6:19 pmSTL-BUF
24h 08m2 stops
$217Frontier
Find Deal
Thu, Jan 15 - Sat, Jan 17
Frontier Logo
3:18 pm - 10:33 pmBUF-STL
8h 15m1 stop
Frontier Logo
4:27 pm - 12:52 pmSTL-BUF
19h 25m1 stop
$231Frontier
Find Deal
Mon, Dec 15 - Mon, Dec 22
Frontier Logo
3:18 pm - 10:33 pmBUF-STL
8h 15m1 stop
Frontier Logo
10:40 am - 9:08 pmSTL-BUF
9h 28m1 stop
$246Frontier
Find Deal
Mon, Dec 15 - Mon, Dec 22
Delta Logo
12:10 pm - 6:33 pmBUF-STL
7h 23m1 stop
Delta Logo
5:00 pm - 10:58 pmSTL-BUF
4h 58m1 stop
$257Delta
Find Deal
Tue, Dec 2 - Sat, Dec 6
Frontier Logo
3:18 pm - 10:33 pmBUF-STL
8h 15m1 stop
Frontier Logo
10:10 pm - 8:40 pmSTL-BUF
45h 30m2 stops
$276Frontier
Find Deal
Mon, Dec 15 - Mon, Dec 22
Frontier Logo
3:18 pm - 10:33 pmBUF-STL
8h 15m1 stop
Frontier Logo
10:10 pm - 8:40 pmSTL-BUF
45h 30m2 stops
$278Frontier
Find Deal
Mon, Dec 15 - Mon, Dec 22
United Airlines Logo
6:00 am - 2:25 pmBUF-STL
9h 25m2 stops
United Airlines Logo
3:13 pm - 9:15 pmSTL-BUF
5h 02m1 stop
$292United Airlines
Find Deal
Tue, Dec 2 - Sat, Dec 6
Delta Logo
12:01 pm - 5:00 pmBUF-STL
5h 59m1 stop
Delta Logo
5:59 pm - 11:28 pmSTL-BUF
4h 29m1 stop
$312Delta
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Thu, Dec 25 - Sun, Dec 28
Delta Logo
2:57 pm - 8:17 pmBUF-STL
6h 20m1 stop
Delta Logo
6:39 am - 12:34 pmSTL-BUF
4h 55m1 stop
$322Delta
Find Deal
Wed, Dec 3 - Sun, Dec 7

Frontier flights from Buffalo to St. Louis

Our best Frontier deals on Buffalo to St. Louis flight tickets
Frontier
Jan 15
BUF7:14 pmBuffalo
12h 37m
1 stop
STL6:51 amLambert-St Louis
Jan 17
STL8:32 pmLambert-St Louis
20h 47m
1 stop
BUF6:19 pmBuffalo
$198
Find similar
Frontier
Jan 15
BUF7:14 pmBuffalo
12h 37m
1 stop
STL6:51 amLambert-St Louis
Jan 17
STL5:11 pmLambert-St Louis
24h 08m
2 stops
BUF6:19 pmBuffalo
$217
Find similar
Frontier
Dec 15
BUF3:18 pmBuffalo
8h 15m
1 stop
STL10:33 pmLambert-St Louis
Dec 22
STL4:27 pmLambert-St Louis
19h 25m
1 stop
BUF12:52 pmBuffalo
$231
Find similar

Delta flights from Buffalo to St. Louis

Our best Delta deals on Buffalo to St. Louis flight tickets
Delta
Dec 2
BUF12:10 pmBuffalo
7h 23m
1 stop
STL6:33 pmLambert-St Louis
Dec 6
STL5:00 pmLambert-St Louis
4h 58m
1 stop
BUF10:58 pmBuffalo
$257
Find similar
Delta
Dec 11
BUF1:16 pmBuffalo
4h 54m
1 stop
STL5:10 pmLambert-St Louis
Dec 15
STL6:05 amLambert-St Louis
7h 12m
1 stop
BUF2:17 pmBuffalo
$307
Find similar
Delta
Dec 25
BUF12:01 pmBuffalo
5h 59m
1 stop
STL5:00 pmLambert-St Louis
Dec 28
STL5:59 pmLambert-St Louis
4h 29m
1 stop
BUF11:28 pmBuffalo
$312
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 November 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

Thu 1/15

7:14 pm-6:51 am

1 stop12h 37m

Lambert-St Louis

Sat 1/17

8:32 pm-6:19 pm

1 stop20h 47m

$198

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Thu 1/15

7:14 pm-6:51 am

1 stop12h 37m

Lambert-St Louis

Sat 1/17

5:11 pm-6:19 pm

2 stops24h 08m

$217

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Mon 12/15

3:18 pm-10:33 pm

1 stop8h 15m

Lambert-St Louis

Mon 12/22

4:27 pm-12:52 pm

1 stop19h 25m

$231

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Mon 12/15

3:18 pm-10:33 pm

1 stop8h 15m

Lambert-St Louis

Mon 12/22

10:40 am-9:08 pm

1 stop9h 28m

$246

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Tue 12/2

12:10 pm-6:33 pm

1 stop7h 23m

Lambert-St Louis

Sat 12/6

5:00 pm-10:58 pm

1 stop4h 58m

$257

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Mon 12/15

3:18 pm-10:33 pm

1 stop8h 15m

Lambert-St Louis

Mon 12/22

10:10 pm-8:40 pm

2 stops45h 30m

$276

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Mon 12/15

3:18 pm-10:33 pm

1 stop8h 15m

Lambert-St Louis

Mon 12/22

10:10 pm-8:40 pm

2 stops45h 30m

$278

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Tue 12/2

6:00 am-2:25 pm

2 stops9h 25m

Lambert-St Louis

Sat 12/6

3:13 pm-9:15 pm

1 stop5h 02m

$292

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Thu 12/25

12:01 pm-5:00 pm

1 stop5h 59m

Lambert-St Louis

Sun 12/28

5:59 pm-11:28 pm

1 stop4h 29m

$312

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Wed 12/3

2:57 pm-8:17 pm

1 stop6h 20m

Lambert-St Louis

Sun 12/7

6:39 am-12:34 pm

1 stop4h 55m

$322

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 $358 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 November 2025, prices for Buffalo to St. Louis flights are approximately 3% 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

Direct flights

None
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 $166Free CancellationRating
7.9
8,003 reviews
Search Delta flights
American AirlinesPriceFrom $243Free CancellationRating
7.2
11,045 reviews
Search American Airlines flights
United AirlinesPriceFrom $296Free CancellationRating
7.4
9,019 reviews
Search United Airlines flights
SouthwestPriceFrom $326Free CancellationRating
8.0
4,248 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
Wentzville
Fenton
Collinsville
St. Peters
Alton
Farmington
Festus
Glencoe
Edwardsville
Clayton
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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