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$114+ 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 8/26. Fares are subject to change and may not be available on all flights or dates of travel.
BUF — STL
jul 8 — jul 151
ter 7/8
ter 7/15
1 adult, Economy
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Cheapflights Tip: The best prices from Buffalo to Lambert-St Louis are usually found in September or August, booked 44 days in advance, depart on a Wednesday or Tuesday and return on a Wednesday

Cheap 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 julho 3, 2025.

Round-trip from

$223
(American Airlines)

One-way from

$114
(American Airlines)

Popular in

March

Cheapest in

September

Average price

$321
From Buffalo to Lambert-St Louis
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One-way flight from Buffalo to Lambert-St Louis
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Highest demand for flights based on searches. 4% potential increase in price ($17 potential increase over avg. RT price).
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Cheapest flight prices on average. 0% potential price decrease ($3 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find 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 julho 3, 2025.

This American Airlines deal was found by Cheapflights users on 7/2. 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.
seg 9/225:26 pmBUF - STL
1 stop7h 22mAmerican Airlines
qui 10/27:23 amSTL - BUF
1 stop8h 27mAmerican Airlines
Deal found 7/2$223
This Southwest deal was found by Cheapflights users on 7/2. 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.
seg 9/225:50 amBUF - STL
1 stop6h 40mSouthwest
qui 10/21:15 pmSTL - BUF
2 stops8h 15mSouthwest
Deal found 7/2$242
This Delta deal was found by Cheapflights users on 7/1. 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.
qui 7/316:00 amBUF - STL
1 stop4h 41mDelta
qui 8/76:40 amSTL - BUF
1 stop4h 30mDelta
Deal found 7/1$244
This United Airlines deal was found by Cheapflights users on 7/1. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ter 7/295:54 pmBUF - STL
1 stop5h 51mUnited Airlines
ter 8/51:20 pmSTL - BUF
2 stops9h 18mUnited Airlines
Deal found 7/1$326
This Justfly.com deal was found by Cheapflights users on 6/30. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
qui 7/109:07 pmBUF - STL
1 stop27h 40mFrontier
dom 7/135:40 pmSTL - BUF
1 stop13h 07mFrontier
Deal found 6/30$328

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 julho 3, 2025.
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

seg 9/22

5:26 pm-11:48 pm

1 stop7h 22m

Lambert-St Louis

qui 10/2

7:23 am-4:50 pm

1 stop8h 27m

$223

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

seg 9/22

5:50 am-11:30 am

1 stop6h 40m

Lambert-St Louis

qui 10/2

1:15 pm-10:30 pm

2 stops8h 15m

$242

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

qui 7/31

6:00 am-9:41 am

1 stop4h 41m

Lambert-St Louis

qui 8/7

6:40 am-12:10 pm

1 stop4h 30m

$244

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

sex 8/15

8:50 am-11:47 pm

1 stop15h 57m

Lambert-St Louis

dom 8/17

5:40 pm-7:47 am

1 stop13h 07m

$281

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

ter 7/29

5:54 pm-10:45 pm

1 stop5h 51m

Lambert-St Louis

ter 8/5

1:20 pm-11:38 pm

2 stops9h 18m

$326

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

ter 8/26

6:25 am-3:49 pm

1 stop10h 24m

$114

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

ter 8/26

1:20 pm-6:55 pm

2 stops6h 35m

$124

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

dom 8/24

6:47 pm-2:21 pm

1 stop20h 34m

$132

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

sáb 7/12

6:00 am-3:47 pm

2 stops10h 47m

$281

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

dom 7/13

11:23 am-9:52 am

3 stops23h 29m

$497

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/30

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

How far ahead should I book a flight from Buffalo to St. Louis?

Use this chart to determine the optimal time to book a round-trip flight from Buffalo to St. Louis. Price data was last updated on June 27, 2025.

The best time to book flights from Buffalo to St. Louis is 44 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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 $311). Flying from Buffalo to St. Louis in March is currently the most expensive (average of $356). 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.

What is the cheapest time of day to fly from BUF to STL?

Find hourly flight availability from Buffalo to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated julho 3, 2025.

One of the essential ways to save on airfare from Buffalo to St. Louis is to remain as flexible as possible. Flights that are in the evening tend to be the most expensive. A flight at noon could potentially save you up to 22% on airfare.

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 julho 3, 2025.
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
4,266 reviews

Boarding

8.2

Entertainment

7.6

Comfort

8.0

Food

7.0

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Southwest
8.0
Very good
4,266 reviews
Southwest
8.0
Very good
4,266 reviews

Boarding

8.2

Entertainment

7.6

Comfort

8.0

Food

7.0

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Delta
8.0
Very good
7,982 reviews
Southwest
8.0
Very good
4,266 reviews

Boarding

8.2

Entertainment

7.6

Comfort

8.0

Food

7.0

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
United Airlines
7.4
Good
8,861 reviews
Southwest
8.0
Very good
4,266 reviews

Boarding

8.2

Entertainment

7.6

Comfort

8.0

Food

7.0

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,266 reviews

Boarding

8.2

Entertainment

7.6

Comfort

8.0

Food

7.0

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Frontier
5.9
Fair
3,286 reviews
Southwest
8.0
Very good
4,266 reviews

Boarding

8.2

Entertainment

7.6

Comfort

8.0

Food

7.0

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

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.

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

    Our cheapest airline available from Buffalo to St. Louis is American Airlines. Our recent data shows that you can find tickets from as low as $223 on this airline. Additional options worth looking into are Southwest and Delta, starting at $242 and $244 round-trip. American Airlines is currently priced 36% 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 $114. Southwest flights start at $124 while deals on Frontier start at $132 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 $311). Flying from Buffalo to St. Louis in March is currently the most expensive (average of $356). 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 Buffalo?

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

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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 julho 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$231Average$337FlexibilityNo cancel feeOn-time71%
DeltaCheapest$276Average$346FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$286Average$517FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$301Average$416FlexibilityNo cancel feeOn-time63%

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