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St. Louis

$84+ 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 5/6. Fares are subject to change and may not be available on all flights or dates of travel.
BUF — STL
Apr 9 — Apr 161
Thu 4/9
Thu 4/16
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 March 10, 2026.

This Kiwi.com deal was found by Cheapflights users on 3/7. 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.
Wed 4/291:56 pm
BUF
-
STL
1 stop21h 30m
Frontier
Wed 5/68:13 pm
STL
-
BUF
1 stop15h 00m
Frontier
Deal found 3/7$182
This Kiwi.com deal was found by Cheapflights users on 3/5. 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.
Mon 4/208:21 pm
BUF
-
STL
2 stops35h 29m
Frontier
Sat 4/258:23 pm
STL
-
BUF
1 stop13h 46m
Frontier
Deal found 3/5$260
This CheapOair deal was found by Cheapflights users on 3/7. 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.
Sun 3/229:47 pm
BUF
-
STL
1 stop26h 32m
Frontier
Thu 3/268:02 am
STL
-
BUF
1 stop25h 47m
Frontier
Deal found 3/7$261
This CheapOair deal was found by Cheapflights users on 3/9. 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.
Mon 6/111:55 am
BUF
-
STL
1 stop13h 02m
Frontier
Wed 6/34:44 pm
STL
-
BUF
1 stop18h 32m
Frontier
Deal found 3/9$267
This Southwest deal was found by Cheapflights users on 3/6. 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 5/162:00 pm
BUF
-
STL
1 stop6h 35m
Southwest
Tue 5/195:35 am
STL
-
BUF
1 stop3h 45m
Southwest
Deal found 3/6$277
This Kiwi.com deal was found by Cheapflights users on 3/6. 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 5/141:08 pm
BUF
-
STL
1 stop18h 42m
Frontier
Tue 5/194:55 pm
STL
-
BUF
2 stops18h 18m
Frontier
Deal found 3/6$283
This Kiwi.com deal was found by Cheapflights users on 3/6. 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 5/151:08 pm
BUF
-
STL
1 stop18h 42m
Frontier
Tue 5/194:55 pm
STL
-
BUF
2 stops18h 18m
Frontier
Deal found 3/6$285
This Southwest deal was found by Cheapflights users on 3/7. 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.
Wed 4/293:10 pm
BUF
-
STL
2 stops7h 50m
Southwest
Wed 5/610:25 am
STL
-
BUF
2 stops6h 50m
Southwest
Deal found 3/7$287
This Southwest deal was found by Cheapflights users on 3/5. 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.
Mon 4/208:00 pm
BUF
-
STL
1 stop3h 45m
Southwest
Sat 4/259:55 am
STL
-
BUF
1 stop5h 20m
Southwest
Deal found 3/5$289
This Southwest deal was found by Cheapflights users on 3/7. 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 4/2512:30 pm
BUF
-
STL
2 stops7h 40m
Southwest
Mon 4/275:40 am
STL
-
BUF
1 stop3h 35m
Southwest
Deal found 3/7$294

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 March 10, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$182
(Kiwi.com)

One-way from

$84
(Kiwi.com)

Popular in

March

Cheapest in

September

Average price

$575
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. 21% potential increase in price ($102 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($19 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 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 March 10, 2026.
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

Cheapest round-trip

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Sat 5/16

2:00 pm-7:35 pm

1 stop6h 35m

Lambert-St Louis

Tue 5/19

5:35 am-10:20 am

1 stop3h 45m

$277

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Mon 4/20

8:00 pm-10:45 pm

1 stop3h 45m

Lambert-St Louis

Sat 4/25

9:55 am-4:15 pm

1 stop5h 20m

$289
Quickest round-trip

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Mon 4/27

4:00 pm-7:45 pm

1 stop4h 45m

Lambert-St Louis

Tue 4/28

5:35 am-10:20 am

1 stop3h 45m

$289

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Sat 4/25

4:10 pm-10:05 pm

1 stop6h 55m

Lambert-St Louis

Mon 4/27

5:40 am-10:15 am

1 stop3h 35m

$289

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Mon 6/1

8:00 pm-10:45 pm

1 stop3h 45m

Lambert-St Louis

Wed 6/3

1:45 pm-10:15 pm

2 stops7h 30m

$294

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Mon 3/30

1:00 pm-10:32 am

1 stop22h 32m

Lambert-St Louis

Wed 4/1

8:16 pm-12:17 pm

2 stops15h 01m

$297

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Sat 5/16

2:00 pm-7:35 pm

1 stop6h 35m

Lambert-St Louis

Sun 5/17

5:25 am-10:25 am

1 stop4h 00m

$322
Cheapest one-way

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Wed 5/6

1:08 pm-10:30 am

1 stop22h 22m

$84

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Sat 3/21

7:36 pm-8:10 pm

1 stop25h 34m

$131

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Fri 5/15

11:25 am-11:19 pm

1 stop12h 54m

$141

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/7

Showing 1-10 of 16 resultsSorted by cheapest first
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 March.
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 $312). 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 March 10, 2026.
Read through reviews of airlines operating flights from Buffalo to St. Louis, such as Southwest,Delta, andAmerican Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,317 reviews

Boarding

8.1

Food

7.0

Entertainment

7.5

Crew

8.6

Comfort

8.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

KOA - HNL

pretty smooth and fast service ever, that flight is very helpful each and everyone for price and also fright for free..
Southwest
8.0
Very good
4,317 reviews
Southwest
8.0
Very good
4,317 reviews

Boarding

8.1

Food

7.0

Entertainment

7.5

Crew

8.6

Comfort

8.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

KOA - HNL

pretty smooth and fast service ever, that flight is very helpful each and everyone for price and also fright for free..
Delta
7.9
Good
8,276 reviews
Southwest
8.0
Very good
4,317 reviews

Boarding

8.1

Food

7.0

Entertainment

7.5

Crew

8.6

Comfort

8.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

KOA - HNL

pretty smooth and fast service ever, that flight is very helpful each and everyone for price and also fright for free..
American Airlines
7.1
Good
11,414 reviews
Southwest
8.0
Very good
4,317 reviews

Boarding

8.1

Food

7.0

Entertainment

7.5

Crew

8.6

Comfort

8.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

KOA - HNL

pretty smooth and fast service ever, that flight is very helpful each and everyone for price and also fright for free..

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 6h 35m. Fly via Southwest to get the fastest option. There are 672 mi between Buffalo and St. Louis.

  • 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 Southwest, starting at $236 and $317 round-trip. Delta is currently priced 55% 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 United Airlines 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 $312). 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
Fenton
Swansea
Fairview Heights
Maryland Heights
Collinsville
Eureka
Wentzville
Glencoe
Chesterfield
Alton
Farmington
Festus

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 3 airlines flying from Buffalo to St. Louis

Discover the top 3 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 March 10, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$164Average$341FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$236Average$371FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$317Average$442FlexibilityNo cancel feeOn-time63%

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