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St. Louis

$59+ Cheap flights from Buffalo to St. Louis (BUF - STL)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/20. Fares are subject to change and may not be available on all flights or dates of travel.
BUF — STL
Feb 25 — Mar 41
Wed 2/25
Wed 3/4
1 adult, Economy
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Cheap flight deals from Buffalo to St. Louis

Cheapest flights from Buffalo to St. Louis
Explore the most affordable flight options available from Buffalo to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 26, 2026.

This CheapOair deal was found by Cheapflights users on 1/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/214:37 pm
BUF
-
STL
1 stop8h 22m
Frontier
Sat 2/283:49 pm
STL
-
BUF
1 stop17h 03m
Frontier
Deal found 1/25$176
This Kiwi.com deal was found by Cheapflights users on 1/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/61:39 pm
BUF
-
STL
1 stop18h 12m
Frontier
Sun 2/88:59 am
STL
-
BUF
2 stops26h 45m
Frontier
Deal found 1/24$202
This CheapOair deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/2411:25 am
BUF
-
STL
1 stop12h 54m
Frontier
Wed 4/294:55 pm
STL
-
BUF
1 stop25h 18m
Frontier
Deal found 1/26$296
This Delta deal was found by Cheapflights users on 1/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/246:15 am
BUF
-
STL
1 stop4h 31m
Delta
Tue 3/3110:12 am
STL
-
BUF
1 stop4h 46m
Delta
Deal found 1/24$307
This Southwest deal was found by Cheapflights users on 1/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/216:30 am
BUF
-
STL
2 stops12h 30m
Southwest
Sat 2/287:50 am
STL
-
BUF
2 stops7h 40m
Southwest
Deal found 1/25$309
This Southwest deal was found by Cheapflights users on 1/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/98:00 pm
BUF
-
STL
1 stop3h 45m
Southwest
Mon 4/137:45 pm
STL
-
BUF
1 stop11h 05m
Southwest
Deal found 1/24$312
This American Airlines deal was found by Cheapflights users on 1/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/186:01 pm
BUF
-
STL
1 stop4h 11m
American Airlines
Fri 2/203:33 pm
STL
-
BUF
1 stop6h 17m
American Airlines
Deal found 1/25$322
This Kiwi.com deal was found by Cheapflights users on 1/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/98:59 pm
BUF
-
STL
1 stop11h 52m
Frontier
Mon 4/134:54 pm
STL
-
BUF
2 stops18h 19m
Frontier
Deal found 1/24$327
This Delta deal was found by Cheapflights users on 1/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/167:38 pm
BUF
-
STL
1 stop5h 20m
Delta
Fri 3/206:32 am
STL
-
BUF
1 stop4h 12m
Delta
Deal found 1/24$337

Find flight deals from Buffalo to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Buffalo (BUF) to St. Louis (STL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 26, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$176
(CheapOair)

One-way from

$59
(Trip.com)

Popular in

March

Cheapest in

September

Average price

$355
Provider with most accurate pricing for Buffalo-Lambert-St Louis flight deals.
Search Deals
Provider most trusted by Cheapflights users for Buffalo-Lambert-St Louis flights.
Search Deals
From Buffalo to Lambert-St Louis
Search Deals
One-way flight from Buffalo to Lambert-St Louis
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($20 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated January 26, 2026.
Use the filters below to find and compare flights from Buffalo to St. Louis that are best for you.

Fly from

Buffalo

Fly to

St. Louis

Route

Depart

Return

Price

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Sat 2/21

4:37 pm-11:59 pm

1 stop8h 22m

Lambert-St Louis

Sat 2/28

3:49 pm-9:52 am

1 stop17h 03m

$176

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Fri 2/6

1:39 pm-6:51 am

1 stop18h 12m

Lambert-St Louis

Sun 2/8

5:42 pm-6:36 pm

1 stop23h 54m

$219

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Fri 4/24

11:25 am-11:19 pm

1 stop12h 54m

Lambert-St Louis

Wed 4/29

4:55 pm-7:13 pm

1 stop25h 18m

$296

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Tue 3/24

6:15 am-9:46 am

1 stop4h 31m

Lambert-St Louis

Tue 3/31

10:12 am-3:58 pm

1 stop4h 46m

$307

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Sat 2/21

6:30 am-6:00 pm

2 stops12h 30m

Lambert-St Louis

Sat 2/28

7:50 am-4:30 pm

2 stops7h 40m

$309

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Thu 4/9

8:00 pm-10:45 pm

1 stop3h 45m

Lambert-St Louis

Mon 4/13

7:45 pm-7:50 am

1 stop11h 05m

$312

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Wed 2/18

6:01 pm-9:12 pm

1 stop4h 11m

Lambert-St Louis

Fri 2/20

3:33 pm-10:50 pm

1 stop6h 17m

$322

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Mon 3/16

7:38 pm-11:58 pm

1 stop5h 20m

Lambert-St Louis

Fri 3/20

6:32 am-11:44 am

1 stop4h 12m

$337

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Fri 4/24

5:55 pm-9:08 pm

1 stop4h 13m

Lambert-St Louis

Wed 4/29

9:10 am-6:49 pm

2 stops8h 39m

$342

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Thu 7/2

10:50 am-2:18 pm

1 stop4h 28m

Lambert-St Louis

Tue 7/7

5:00 am-9:49 am

1 stop3h 49m

$342

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/24

Showing 1-10 of 20 results
1
2

Compare providers for flights from Buffalo to St. Louis

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Buffalo to St. Louis in January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Buffalo-St. Louis flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Buffalo-St. Louis flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Buffalo-St. Louis flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Buffalo-St. Louis flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Buffalo-St. Louis flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Buffalo to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Buffalo with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Buffalo to St. Louis

What is the cheapest month to book a flight from Buffalo to St. Louis?

Currently, August is the cheapest month in which you can book a flight from Buffalo to St. Louis (average of $112). Flying from Buffalo to St. Louis in February is currently the most expensive (average of $308). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to St. Louis. Reviews last updated January 26, 2026.
Read through reviews of airlines operating flights from Buffalo to St. Louis, such as Southwest, Delta, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,268 reviews

Crew

8.6

Comfort

8.0

Food

7.0

Boarding

8.1

Entertainment

7.5

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Southwest
8.0
Very good
4,268 reviews
Southwest
8.0
Very good
4,268 reviews

Crew

8.6

Comfort

8.0

Food

7.0

Boarding

8.1

Entertainment

7.5

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Delta
7.9
Good
8,111 reviews
Southwest
8.0
Very good
4,268 reviews

Crew

8.6

Comfort

8.0

Food

7.0

Boarding

8.1

Entertainment

7.5

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
United Airlines
7.4
Good
9,199 reviews
Southwest
8.0
Very good
4,268 reviews

Crew

8.6

Comfort

8.0

Food

7.0

Boarding

8.1

Entertainment

7.5

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
American Airlines
7.2
Good
11,189 reviews
Southwest
8.0
Very good
4,268 reviews

Crew

8.6

Comfort

8.0

Food

7.0

Boarding

8.1

Entertainment

7.5

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Related info for your journey

Find useful and relevant information for your journey from Buffalo to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Buffalo to St. Louis?

    There are many flights that can get you from Buffalo to St. Louis in 4h 31m. Fly via Frontier or Delta to get the fastest option. There are 672 mi between Buffalo and St. Louis. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from Buffalo to St. Louis round-trip?

    Our cheapest airline available from Buffalo to St. Louis is Delta. Our recent data shows that you can find tickets from as low as $164 on this airline. Additional options worth looking into are American Airlines and United Airlines, starting at $243 and $316 round-trip. Delta is currently priced 52% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from Buffalo to St. Louis one-way?

    To fly one-way, consider booking your trip with American Airlines, which is currently one of the cheapest options available, starting at $95. Delta flights start at $125 while deals on Southwest start at $143 one-way.

  • Can I find deals for flights from Buffalo to St. Louis that include hotel bookings?

    Yes. In addition to deals on Buffalo to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Buffalo to St. Louis?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Buffalo to St. Louis.

  • Can I find deals for business class flights from Buffalo to St. Louis?

    Yes. Cheapflights offers flight deals from Buffalo to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Buffalo to St. Louis?

    Currently, August is the cheapest month in which you can book a flight from Buffalo to St. Louis (average of $112). Flying from Buffalo to St. Louis in February is currently the most expensive (average of $308). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Edwardsville
O'Fallon
Swansea
Fairview Heights
Maryland Heights
Collinsville
Eureka
Glencoe
Chesterfield
Alton
Farmington
Festus

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Buffalo to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.
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Top 4 airlines flying from Buffalo to St. Louis

Discover the top 4 airlines that operate flights from Buffalo to St. Louis. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 26, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$164Average$341FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$243Average$341FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$316Average$517FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$338Average$406FlexibilityNo cancel feeOn-time63%

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