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$63+ 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 7/13. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BUF
Jun 6 — Jun 131
Sat 6/6
Sat 6/13
1 adult, Economy
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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 May 7, 2026.

This Kiwi.com deal was found by Cheapflights users on 5/6. 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.
Mon 6/295:06 pm
STL
-
BUF
1 stop16h 49m
Frontier
Thu 7/211:35 am
BUF
-
STL
1 stop6h 55m
Frontier
Deal found 5/6$121
This Kiwi.com deal was found by Cheapflights users on 5/6. 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.
Mon 8/245:33 pm
STL
-
BUF
1 stop16h 07m
Frontier
Fri 8/282:50 pm
BUF
-
STL
1 stop19h 02m
Frontier
Deal found 5/6$123
This Kiwi.com deal was found by Cheapflights users on 5/5. 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.
Fri 6/55:27 pm
STL
-
BUF
1 stop17h 01m
Frontier
Sun 6/711:36 am
BUF
-
STL
1 stop6h 57m
Frontier
Deal found 5/5$124
This Kiwi.com deal was found by Cheapflights users on 5/6. 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.
Tue 6/166:31 pm
STL
-
BUF
1 stop18h 24m
Frontier
Thu 6/1811:35 am
BUF
-
STL
1 stop22h 17m
Frontier
Deal found 5/6$126
This Kiwi.com deal was found by Cheapflights users on 5/6. 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.
Sat 7/114:52 pm
STL
-
BUF
1 stop16h 47m
Frontier
Tue 7/1411:50 am
BUF
-
STL
1 stop6h 47m
Frontier
Deal found 5/6$135
This Kiwi.com deal was found by Cheapflights users on 5/3. 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 6/155:06 pm
STL
-
BUF
1 stop16h 49m
Frontier
Thu 6/1811:35 am
BUF
-
STL
1 stop6h 55m
Frontier
Deal found 5/3$140
This Kiwi.com deal was found by Cheapflights users on 5/5. 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.
Fri 8/144:52 pm
STL
-
BUF
1 stop17h 41m
Frontier
Sun 8/1611:35 am
BUF
-
STL
1 stop7h 02m
Frontier
Deal found 5/5$150
This Kiwi.com deal was found by Cheapflights users on 5/3. 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.
Tue 6/26:33 pm
STL
-
BUF
1 stop18h 21m
Frontier
Mon 6/82:49 pm
BUF
-
STL
1 stop27h 41m
Frontier
Deal found 5/3$159
This Kiwi.com deal was found by Cheapflights users on 5/6. 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 7/174:52 pm
STL
-
BUF
1 stop17h 41m
Frontier
Sun 7/1911:35 am
BUF
-
STL
1 stop7h 02m
Frontier
Deal found 5/6$162
This Kiwi.com deal was found by Cheapflights users on 5/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/268:08 pm
STL
-
BUF
2 stops37h 33m
Frontier
Sun 5/3111:36 am
BUF
-
STL
1 stop22h 19m
Frontier
Deal found 5/2$189
This Kiwi.com deal was found by Cheapflights users on 5/5. 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.
Wed 8/198:08 pm
STL
-
BUF
2 stops13h 32m
Frontier
Sun 8/2311:35 am
BUF
-
STL
1 stop6h 55m
Frontier
Deal found 5/5$196
This Kiwi.com deal was found by Cheapflights users on 5/6. 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.
Wed 7/294:52 pm
STL
-
BUF
1 stop16h 47m
Frontier
Sun 8/211:35 am
BUF
-
STL
1 stop7h 02m
Frontier
Deal found 5/6$199

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 May 7, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$121
(Kiwi.com)

One-way from

$63
(Kiwi.com)

Popular in

April

Cheapest in

September

Average price

$390
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. 15% potential increase in price ($69 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($13 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 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 May 7, 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

Wed 7/29

4:52 pm-10:39 am

1 stop16h 47m

Buffalo

Sun 8/2

11:35 am-5:37 pm

1 stop7h 02m

$199

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Wed 9/30

11:51 am-6:43 pm

1 stop5h 52m

Buffalo

Tue 10/13

4:30 pm-8:49 pm

1 stop5h 19m

$287

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Sat 5/23

1:13 pm-9:03 pm

1 stop6h 50m

Buffalo

Fri 5/29

7:00 am-10:34 am

1 stop4h 34m

$329

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Fri 5/29

5:45 pm-11:32 pm

1 stop4h 47m

Buffalo

Mon 6/1

2:47 pm-8:39 pm

1 stop6h 52m

$329

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Tue 6/2

1:13 pm-9:03 pm

1 stop6h 50m

Buffalo

Wed 6/3

6:04 pm-9:21 pm

1 stop4h 17m

$357

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Tue 6/9

1:13 pm-9:03 pm

1 stop6h 50m

Buffalo

Wed 6/10

6:04 pm-9:21 pm

1 stop4h 17m

$377

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Thu 10/15

12:35 pm-11:00 pm

1 stop9h 25m

Buffalo

Thu 10/22

10:55 am-5:10 pm

1 stop7h 15m

$387

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Fri 9/11

6:05 am-10:45 am

1 stop3h 40m

Buffalo

Mon 9/14

4:35 pm-10:25 pm

1 stop6h 50m

$387
Quickest round-trip

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Fri 7/10

6:04 pm-11:58 pm

1 stop4h 54m

Buffalo

Sun 7/12

6:29 am-9:31 am

1 stop4h 02m

$387
Cheapest one-way

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Mon 7/13

4:52 pm-10:54 am

1 stop17h 02m

$63

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/5

Showing 1-10 of 18 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 May.
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

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

To ensure you get the cheapest price possible for a flight from St. Louis to Buffalo, you should look to book at least 30 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, September is the cheapest month in which you can book a flight from St. Louis to Buffalo (average of $316). Flying from St. Louis to Buffalo in April is currently the most expensive (average of $513). 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.

How much does it cost to fly round-trip from St. Louis to Buffalo?

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 May 7, 2026.
Peruse reviews from past customers who have flown with Southwest,Delta, andAmerican 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
7.9
Good
4,301 reviews

Crew

8.6

Entertainment

7.5

Boarding

8.1

Food

7.0

Comfort

8.0

Overall

7.9

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
7.9
Good
4,301 reviews
Southwest
7.9
Good
4,301 reviews

Crew

8.6

Entertainment

7.5

Boarding

8.1

Food

7.0

Comfort

8.0

Overall

7.9

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
8,459 reviews
Southwest
7.9
Good
4,301 reviews

Crew

8.6

Entertainment

7.5

Boarding

8.1

Food

7.0

Comfort

8.0

Overall

7.9

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
11,669 reviews
Southwest
7.9
Good
4,301 reviews

Crew

8.6

Entertainment

7.5

Boarding

8.1

Food

7.0

Comfort

8.0

Overall

7.9

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 $357, Frontier can have you in Buffalo from St. Louis in 6h 50m. St. Louis and Buffalo are separated by a distance of 672 mi. This flight may include one or multiple stops.

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

    According to our current data, American Airlines ($221), Delta ($238), and Southwest ($298) offers the cheapest pricing from St. Louis to Buffalo. American Airlines is currently priced 41% 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, September is the cheapest month in which you can book a flight from St. Louis to Buffalo (average of $316). Flying from St. Louis to Buffalo in April is currently the most expensive (average of $513). 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 3 airlines flying from St. Louis to Buffalo

Discover the top 3 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 May 7, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$221Average$351FlexibilityNo cancel feeOn-time71%
DeltaCheapest$238Average$316FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$298Average$526FlexibilityNo cancel feeOn-time63%

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