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$156+ Cheap flights from St. Louis to Buffalo (STL - BUF)

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 5/26. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BUF
Apr 22 — Apr 291
Wed 4/22
Wed 4/29
1 adult, Economy
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1. Tell us where you want to go

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Cheap flight deals from St. Louis to Buffalo

Cheapest flights from St. Louis to Buffalo
Explore the most affordable flight options available from St. Louis to Buffalo. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 23, 2026.

This Kiwi.com deal was found by Cheapflights users on 3/20. 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 4/248:23 pm
STL
-
BUF
1 stop14h 50m
Frontier
Sun 4/2612:07 pm
BUF
-
STL
1 stop19h 43m
Frontier
Deal found 3/20$203
This Kiwi.com deal was found by Cheapflights users on 3/21. 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 4/298:23 pm
STL
-
BUF
1 stop14h 49m
Frontier
Fri 5/82:49 pm
BUF
-
STL
1 stop19h 06m
Frontier
Deal found 3/21$225
This Kiwi.com deal was found by Cheapflights users on 3/18. 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 4/1611:25 am
STL
-
BUF
1 stop22h 48m
Frontier
Tue 4/211:56 pm
BUF
-
STL
1 stop17h 54m
Frontier
Deal found 3/18$229
This Frontier deal was found by Cheapflights users on 3/22. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/68:41 am
STL
-
BUF
1 stop9h 50m
Frontier
Fri 4/104:45 pm
BUF
-
STL
1 stop8h 13m
Frontier
Deal found 3/22$235
This Kiwi.com deal was found by Cheapflights users on 3/18. 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 4/178:23 pm
STL
-
BUF
1 stop14h 50m
Frontier
Fri 4/2412:18 pm
BUF
-
STL
1 stop19h 32m
Frontier
Deal found 3/18$241
This Expedia deal was found by Cheapflights users on 3/23. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/274:51 pm
STL
-
BUF
1 stop26h 39m
Frontier
Sun 3/299:25 pm
BUF
-
STL
1 stop10h 37m
Frontier
Deal found 3/23$250

Find flight deals from St. Louis to Buffalo

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Buffalo (BUF). 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 23, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$203
(Kiwi.com)

One-way from

$156
(American Airlines)

Popular in

March

Cheapest in

July

Average price

$466
Provider with most accurate pricing for Lambert-St Louis-Buffalo flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lambert-St Louis-Buffalo flights.
Search Deals
From Lambert-St Louis to Buffalo
Search Deals
One-way flight from Lambert-St Louis to Buffalo
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($58 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($9 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 St. Louis to Buffalo 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 23, 2026.
Use the filters below to find and compare flights from St. Louis to Buffalo that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Fri 4/17

8:23 pm-12:13 pm

1 stop14h 50m

Buffalo

Fri 4/24

12:18 pm-6:50 am

1 stop19h 32m

$241

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Thu 4/16

11:25 am-9:57 am

2 stops21h 32m

Buffalo

Tue 4/21

1:56 pm-6:50 am

1 stop17h 54m

$276

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Sat 4/18

6:10 am-4:35 pm

2 stops9h 25m

Buffalo

Sat 4/25

6:00 am-1:35 pm

2 stops8h 35m

$307

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Thu 5/7

2:25 pm-10:45 pm

1 stop7h 20m

Buffalo

Sat 5/9

2:00 pm-7:35 pm

1 stop6h 35m

$309

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Wed 4/29

9:10 am-5:16 pm

1 stop7h 06m

Buffalo

Sat 5/2

5:55 pm-10:45 pm

1 stop5h 50m

$367

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Wed 8/19

6:30 am-2:20 pm

2 stops6h 50m

Buffalo

Sat 8/22

10:50 am-3:30 pm

1 stop5h 40m

$367

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Sat 6/6

12:50 pm-11:10 pm

2 stops9h 20m

Buffalo

Wed 6/10

6:00 am-11:30 am

1 stop6h 30m

$367

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Sat 5/30

9:23 am-4:51 pm

1 stop6h 28m

Buffalo

Sat 6/6

7:00 am-12:07 pm

1 stop6h 07m

$387

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Fri 4/3

8:23 am-8:15 pm

1 stop10h 52m

Buffalo

Sun 4/5

11:54 am-11:25 pm

1 stop12h 31m

$390
Quickest round-trip

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Thu 6/18

4:35 pm-12:10 am

2 stops6h 35m

Buffalo

Mon 6/22

7:55 pm-10:50 pm

1 stop3h 55m

$392

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/18

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

Compare providers for flights from St. Louis to Buffalo

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 St. Louis to Buffalo in March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*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 St. Louis-Buffalo flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Buffalo flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Buffalo flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on St. Louis-Buffalo 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 St. Louis-Buffalo 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 St. Louis to Buffalo

Have a flexible travel schedule? Discover the best time to fly to Buffalo from St. Louis 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 St. Louis to Buffalo

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

Currently, July is the cheapest month in which you can book a flight from St. Louis to Buffalo (average of $179). Flying from St. Louis to Buffalo in March is currently the most expensive (average of $316). 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 Buffalo

Get insights into the airlines that provide service to Buffalo. 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 Buffalo. Reviews last updated March 23, 2026.
Peruse reviews from past customers who have flown with Southwest,Delta, andUnited Airlines from St. Louis to Buffalo to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,324 reviews

Boarding

8.1

Comfort

8.0

Overall

8.0

Entertainment

7.5

Food

7.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Southwest
8.0
Very good
4,324 reviews
Southwest
8.0
Very good
4,324 reviews

Boarding

8.1

Comfort

8.0

Overall

8.0

Entertainment

7.5

Food

7.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Delta
7.9
Good
8,319 reviews
Southwest
8.0
Very good
4,324 reviews

Boarding

8.1

Comfort

8.0

Overall

8.0

Entertainment

7.5

Food

7.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
United Airlines
7.4
Good
9,460 reviews
Southwest
8.0
Very good
4,324 reviews

Boarding

8.1

Comfort

8.0

Overall

8.0

Entertainment

7.5

Food

7.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
American Airlines
7.1
Good
11,489 reviews
Southwest
8.0
Very good
4,324 reviews

Boarding

8.1

Comfort

8.0

Overall

8.0

Entertainment

7.5

Food

7.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Buffalo. 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 St. Louis to Buffalo?

    For as low as $203, Frontier can have you in Buffalo from St. Louis in 14h 50m. St. Louis and Buffalo are separated by a distance of 672 mi.

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

    According to our current data, United Airlines ($167), American Airlines ($221), and Delta ($238) offers the cheapest pricing from St. Louis to Buffalo. United Airlines is currently priced 54% below the average price you’ll pay for this route.

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

    $95 is the cheapest one-way deal found within the past few days, from American Airlines. You may also be able to find cheap deals on Delta and Southwest, with prices starting from $123 and $129, respectively.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from St. Louis to Buffalo 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 St. Louis to Buffalo?

    Currently, July is the cheapest month in which you can book a flight from St. Louis to Buffalo (average of $179). Flying from St. Louis to Buffalo in March is currently the most expensive (average of $316). 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
Lockport
Cheektowaga
Batavia
Williamsville
Orchard Park
Eden
Amherst
West Seneca

Browse thousands of different options on Cheapflights for your next trip

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Top 4 airlines flying from St. Louis to Buffalo

Discover the top 4 airlines that operate flights from St. Louis to Buffalo. 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 23, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$167Average$556FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$221Average$337FlexibilityNo cancel feeOn-time71%
DeltaCheapest$238Average$311FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$336Average$526FlexibilityNo cancel feeOn-time63%

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