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$113+ 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 8/14. Fares are subject to change and may not be available on all flights or dates of travel.
BUF — STL
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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Cheapflights Tip: The best prices from Buffalo to Lambert-St Louis are usually found in September or July, 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 June 12, 2025.

Round-trip from

$213
(American Airlines)

One-way from

$113
(American Airlines)

Popular in

March

Cheapest in

September

Average price

$386
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 ($4 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 12, 2025.

This American Airlines deal was found by Cheapflights users on 6/10. 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.
Tue 8/2611:34 amBUF - STL
1 stop8h 47mAmerican Airlines
Wed 8/277:23 amSTL - BUF
1 stop8h 40mAmerican Airlines
Deal found 6/10$213
This Delta deal was found by Cheapflights users on 6/11. 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.
Fri 9/512:02 pmBUF - STL
1 stop5h 04mDelta
Mon 9/89:16 amSTL - BUF
1 stop6h 48mDelta
Deal found 6/11$251
This Southwest deal was found by Cheapflights users on 6/10. 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.
Tue 8/264:05 pmBUF - STL
2 stops7h 00mSouthwest
Wed 8/271:45 pmSTL - BUF
1 stop5h 35mSouthwest
Deal found 6/10$256
This Mytrip deal was found by Cheapflights users on 6/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/311:23 amBUF - STL
1 stop25h 07mSun Country Air
Sun 7/66:36 amSTL - BUF
1 stop27h 20mSun Country Air
Deal found 6/10$274
This Mytrip deal was found by Cheapflights users on 6/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/311:23 amBUF - STL
2 stops30h 41mMultiple Airlines
Sun 7/66:36 amSTL - BUF
1 stop27h 20mMultiple Airlines
Deal found 6/10$307
This FlightHub deal was found by Cheapflights users on 6/9. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/132:10 pmBUF - STL
1 stop20h 02mFrontier
Sun 6/155:47 pmSTL - BUF
1 stop13h 03mFrontier
Deal found 6/9$366
This United Airlines deal was found by Cheapflights users on 6/11. 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.
Fri 7/411:22 amBUF - STL
2 stops11h 13mUnited Airlines
Mon 7/75:00 amSTL - BUF
1 stop3h 54mUnited Airlines
Deal found 6/11$377

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 June 12, 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

Tue 8/26

11:34 am-7:21 pm

1 stop8h 47m

Lambert-St Louis

Wed 8/27

7:23 am-5:03 pm

1 stop8h 40m

$213

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Fri 9/5

12:02 pm-4:06 pm

1 stop5h 04m

Lambert-St Louis

Mon 9/8

9:16 am-5:04 pm

1 stop6h 48m

$251

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Tue 8/26

4:05 pm-10:05 pm

2 stops7h 00m

Lambert-St Louis

Wed 8/27

1:45 pm-8:20 pm

1 stop5h 35m

$256

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Thu 7/3

11:23 am-11:30 am

1 stop25h 07m

Lambert-St Louis

Sun 7/6

6:36 am-10:56 am

1 stop27h 20m

$274

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Thu 7/3

11:23 am-5:04 pm

2 stops30h 41m

Lambert-St Louis

Sun 7/6

6:36 am-10:56 am

1 stop27h 20m

$307

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Fri 7/4

11:22 am-9:35 pm

2 stops11h 13m

Lambert-St Louis

Mon 7/7

5:00 am-9:54 am

1 stop3h 54m

$377

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Thu 6/26

9:07 pm-11:53 pm

1 stop27h 46m

Lambert-St Louis

Sun 6/29

5:47 pm-7:50 am

1 stop13h 03m

$402

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Thu 8/14

6:29 am-1:12 pm

1 stop7h 43m

$113

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Tue 7/1

6:04 am-11:31 am

1 stop6h 27m

$119

BuffaloSt. Louis

BUF - STL

BUFSTL

Buffalo

Sat 8/2

1:14 pm-1:34 pm

1 stop25h 20m

$156

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 13 results
1
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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 9, 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 June 12, 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.

Rainfall in St. Louis by month

Plan your trip to St. Louis by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in St. Louis ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.

Temperature in St. Louis by month

Plan your trip to St. Louis by taking into account the average temperature totals by month.

If weather is an important factor for your trip to St. Louis, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

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 June 12, 2025.
Read through reviews of airlines operating flights from Buffalo to St. Louis, such as Southwest, Delta and United Airlines. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,287 reviews

Crew

8.6

Overall

8.0

Food

7.1

Comfort

8.0

Entertainment

7.6

Boarding

8.2

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
4,287 reviews
Southwest
8.0
Very good
4,287 reviews

Crew

8.6

Overall

8.0

Food

7.1

Comfort

8.0

Entertainment

7.6

Boarding

8.2

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
7,946 reviews
Southwest
8.0
Very good
4,287 reviews

Crew

8.6

Overall

8.0

Food

7.1

Comfort

8.0

Entertainment

7.6

Boarding

8.2

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
8,790 reviews
Southwest
8.0
Very good
4,287 reviews

Crew

8.6

Overall

8.0

Food

7.1

Comfort

8.0

Entertainment

7.6

Boarding

8.2

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
4,287 reviews

Crew

8.6

Overall

8.0

Food

7.1

Comfort

8.0

Entertainment

7.6

Boarding

8.2

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.
Sun Country Air
6.9
Okay
345 reviews
Southwest
8.0
Very good
4,287 reviews

Crew

8.6

Overall

8.0

Food

7.1

Comfort

8.0

Entertainment

7.6

Boarding

8.2

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 $213 on this airline. Additional options worth looking into are Delta and Southwest, starting at $251 and $256 round-trip. American Airlines is currently priced 39% 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 $113. Delta flights start at $119 while deals on Frontier start at $156 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
Festus
Alton
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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$246Average$335FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$256Average$517FlexibilityNo cancel feeOn-time69%
DeltaCheapest$276Average$346FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$301Average$416FlexibilityNo cancel feeOn-time63%

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