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$129+ 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 3/11. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BUF
Dec 9 — Dec 161
Tue 12/9
Tue 12/16
1 adult, Economy
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1. Tell us where you want to go

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Cheapflights Tip: The best prices from Lambert-St Louis to Buffalo are usually found in October or July, booked 23 days in advance, depart on a Wednesday or Sunday and return on a Wednesday

Find 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 November 9, 2025.

This Kiwi.com deal was found by Cheapflights users on 11/7. 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.
Thu 12/184:27 pmSTL - BUF
1 stop27h 13mFrontier
Mon 12/225:40 pmBUF - STL
1 stop17h 00mFrontier
Deal found 11/7$276
This Kiwi.com deal was found by Cheapflights users on 11/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/244:13 pmSTL - BUF
1 stop24h 39mFrontier
Fri 11/283:28 pmBUF - STL
2 stops9h 29mFrontier
Deal found 11/9$325
This Delta deal was found by Cheapflights users on 11/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/244:30 pmSTL - BUF
1 stop6h 29mDelta
Fri 11/281:11 pmBUF - STL
1 stop6h 24mDelta
Deal found 11/9$352
This American Airlines deal was found by Cheapflights users on 11/8. 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.
Fri 12/195:30 amSTL - BUF
1 stop4h 37mAmerican Airlines
Tue 12/307:15 pmBUF - STL
1 stop5h 40mAmerican Airlines
Deal found 11/8$392
This Kiwi.com deal was found by Cheapflights users on 11/8. 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 12/198:37 pmSTL - BUF
1 stop23h 13mFrontier
Tue 12/306:32 pmBUF - STL
2 stops29h 01mFrontier
Deal found 11/8$396
This Kiwi.com deal was found by Cheapflights users on 11/8. 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 12/204:27 pmSTL - BUF
1 stop19h 09mFrontier
Tue 12/306:32 pmBUF - STL
2 stops29h 01mFrontier
Deal found 11/8$400
This Southwest deal was found by Cheapflights users on 11/7. 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.
Thu 12/182:30 pmSTL - BUF
2 stops8h 10mSouthwest
Mon 12/222:45 pmBUF - STL
2 stops8h 05mSouthwest
Deal found 11/7$401
This Southwest deal was found by Cheapflights users on 11/7. 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.
Thu 12/256:05 amSTL - BUF
1 stop7h 15mSouthwest
Mon 12/295:30 amBUF - STL
1 stop4h 40mSouthwest
Deal found 11/7$429
This Delta deal was found by Cheapflights users on 11/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/276:25 pmSTL - BUF
1 stop4h 03mDelta
Sat 1/35:52 pmBUF - STL
1 stop3h 49mDelta
Deal found 11/9$438
This Southwest deal was found by Cheapflights users on 11/8. 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 12/205:45 pmSTL - BUF
1 stop5h 05mSouthwest
Tue 12/305:00 amBUF - STL
1 stop8h 30mSouthwest
Deal found 11/8$443

Cheap 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 November 9, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$275
(Delta)

One-way from

$129
(Delta)

Popular in

January

Cheapest in

October

Average price

$577
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. 18% potential increase in price ($94 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($20 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
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 November 9, 2025.
Use the filters below to find and compare flights from St. Louis to Buffalo that are best for you.

Fly from

St. Louis

Fly to

Buffalo

Route

Depart

Return

Price

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Sat 2/28

5:54 pm-10:59 pm

1 stop4h 05m

Buffalo

Mon 3/2

2:56 pm-8:11 pm

1 stop6h 15m

$275

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Thu 12/18

4:27 pm-8:40 pm

1 stop27h 13m

Buffalo

Mon 12/22

5:40 pm-9:40 am

1 stop17h 00m

$276

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Wed 3/11

6:00 am-1:48 pm

1 stop6h 48m

Buffalo

Mon 3/16

6:50 pm-11:40 pm

1 stop5h 50m

$312

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Mon 11/24

4:13 pm-5:52 pm

1 stop24h 39m

Buffalo

Fri 11/28

3:28 pm-11:57 pm

2 stops9h 29m

$325

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Thu 1/1

9:45 am-5:35 pm

1 stop6h 50m

Buffalo

Fri 1/2

8:40 pm-12:05 am

1 stop4h 25m

$332

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Sat 2/28

7:41 am-7:06 pm

2 stops10h 25m

Buffalo

Mon 3/2

6:25 pm-12:05 am

1 stop6h 40m

$350

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Thu 3/12

6:00 am-1:48 pm

1 stop6h 48m

Buffalo

Mon 3/16

6:50 pm-11:40 pm

1 stop5h 50m

$367

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Wed 3/11

9:00 am-5:26 pm

1 stop7h 26m

$129

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Wed 3/11

9:28 am-3:39 pm

1 stop5h 11m

$129

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Wed 3/11

7:30 am-7:06 pm

2 stops10h 36m

$169

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/7

Showing 1-10 of 14 results
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 November.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on St. Louis-Buffalo flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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?

Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Buffalo. Price data was last updated on November 7, 2025.

To ensure you get the cheapest price possible for a flight from St. Louis to Buffalo, you should look to book at least 17 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, March is the cheapest month in which you can book a flight from St. Louis to Buffalo (average of $133). Flying from St. Louis to Buffalo in January is currently the most expensive (average of $384). 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 STL to BUF?

Find hourly flight availability from St. Louis to Buffalo. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 9, 2025.

It’s optimal to fly from St. Louis to Buffalo in the evening. By choosing this option you can save up to 33% on the cost of your flight, compared to a flight in the morning.

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 November 9, 2025.
Peruse reviews from past customers who have flown with Southwest, Delta, and United 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
4,238 reviews

Comfort

8.0

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,238 reviews
Southwest
8.0
Very good
4,238 reviews

Comfort

8.0

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Delta
7.9
Good
8,004 reviews
Southwest
8.0
Very good
4,238 reviews

Comfort

8.0

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
United Airlines
7.4
Good
9,012 reviews
Southwest
8.0
Very good
4,238 reviews

Comfort

8.0

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
American Airlines
7.2
Good
11,047 reviews
Southwest
8.0
Very good
4,238 reviews

Comfort

8.0

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

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 $275, Delta can have you in Buffalo from St. Louis in 4h 05m. 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, United Airlines ($167), American Airlines ($233), and Delta ($238) offers the cheapest pricing from St. Louis to Buffalo. United Airlines is currently priced 60% below the average price you’ll pay for this route.

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

    $129 is the cheapest one-way deal found within the past few days, from Delta. You may also be able to find cheap deals on American Airlines and United Airlines, with prices starting from $129 and $169, 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, March is the cheapest month in which you can book a flight from St. Louis to Buffalo (average of $133). Flying from St. Louis to Buffalo in January is currently the most expensive (average of $384). 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
Orchard Park
Batavia
Williamsville
Eden
Amherst
West Seneca

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Alternative routes for St. Louis to Buffalo

See prices for flight routes from nearby airports that may be better suited for you.
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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 November 9, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$167Average$418FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$233Average$368FlexibilityNo cancel feeOn-time71%
DeltaCheapest$238Average$352FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$336Average$416FlexibilityNo cancel feeOn-time63%

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