HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Buffalo

$119+ 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 10/31. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BUF
Nov 15 — Nov 221
Sat 11/15
Sat 11/22
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from St. Louis to Buffalo with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 October 16, 2025.

This Delta deal was found by Cheapflights users on 10/15. 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 11/155:00 pmSTL - BUF
1 stop4h 57mDelta
Tue 11/182:50 pmBUF - STL
1 stop6h 29mDelta
Deal found 10/15$257
This American Airlines deal was found by Cheapflights users on 10/14. 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.
Thu 11/136:02 amSTL - BUF
1 stop5h 03mAmerican Airlines
Tue 11/186:33 pmBUF - STL
1 stop5h 34mAmerican Airlines
Deal found 10/14$277
This United Airlines deal was found by Cheapflights users on 10/15. 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.
Sat 11/155:11 pmSTL - BUF
1 stop4h 47mUnited Airlines
Tue 11/186:00 amBUF - STL
2 stops9h 24mUnited Airlines
Deal found 10/15$292
This Kiwi.com deal was found by Cheapflights users on 10/13. 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 10/298:40 pmSTL - BUF
2 stops15h 57mFrontier
Sun 11/26:59 pmBUF - STL
1 stop15h 41mFrontier
Deal found 10/13$307
This Delta deal was found by Cheapflights users on 10/15. 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 11/155:15 pmSTL - BUF
1 stop5h 35mDelta
Sun 11/2312:05 pmBUF - STL
1 stop5h 02mDelta
Deal found 10/15$312
This American Airlines deal was found by Cheapflights users on 10/15. 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 11/256:02 amSTL - BUF
1 stop4h 59mAmerican Airlines
Wed 11/267:05 pmBUF - STL
1 stop4h 59mAmerican Airlines
Deal found 10/15$317
This Delta deal was found by Cheapflights users on 10/15. 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.
Thu 11/206:40 amSTL - BUF
1 stop4h 51mDelta
Sun 11/2312:05 pmBUF - STL
1 stop7h 30mDelta
Deal found 10/15$332
This United Airlines deal was found by Cheapflights users on 10/15. 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.
Thu 11/1310:00 amSTL - BUF
2 stops11h 58mUnited Airlines
Tue 11/186:00 amBUF - STL
2 stops10h 47mUnited Airlines
Deal found 10/15$357
This Southwest deal was found by Cheapflights users on 10/15. 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 11/256:45 amSTL - BUF
1 stop7h 00mSouthwest
Wed 11/2612:40 pmBUF - STL
2 stops10h 20mSouthwest
Deal found 10/15$367
This American Airlines deal was found by Cheapflights users on 10/13. 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.
Wed 10/2910:16 amSTL - BUF
1 stop10h 37mAmerican Airlines
Sun 11/27:12 pmBUF - STL
1 stop5h 53mAmerican Airlines
Deal found 10/13$424

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 October 16, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$257
(Delta)

One-way from

$119
(Delta)

Popular in

January

Cheapest in

October

Average price

$341
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. 22% potential increase in price ($117 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($21 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 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 October 16, 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 11/15

5:00 pm-10:57 pm

1 stop4h 57m

Buffalo

Sun 11/23

6:12 am-9:46 am

1 stop4h 34m

$312

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Thu 11/20

6:40 am-12:31 pm

1 stop4h 51m

Buffalo

Sun 11/23

9:14 am-1:51 pm

1 stop5h 37m

$332

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Thu 11/13

10:00 am-10:58 pm

2 stops11h 58m

Buffalo

Tue 11/18

6:00 am-3:47 pm

2 stops10h 47m

$357

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Tue 11/25

6:45 am-2:45 pm

1 stop7h 00m

Buffalo

Wed 11/26

12:40 pm-10:00 pm

2 stops10h 20m

$367

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Sat 11/15

10:00 am-6:46 pm

2 stops7h 46m

Buffalo

Tue 11/18

6:00 am-2:24 pm

2 stops9h 24m

$387

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Sat 11/15

3:14 pm-9:00 pm

1 stop4h 46m

Buffalo

Sun 11/23

6:25 am-3:46 pm

2 stops10h 21m

$387

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Wed 10/29

8:00 am-6:33 pm

2 stops9h 33m

Buffalo

Sun 11/2

5:25 am-1:24 pm

2 stops8h 59m

$454

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Fri 10/31

5:15 pm-11:39 pm

1 stop5h 24m

$119

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Thu 10/30

11:07 am-11:44 am

2 stops23h 37m

$125

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

Wed 11/5

3:59 pm-11:39 pm

1 stop6h 40m

$129

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/13

Showing 1-10 of 18 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 October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
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 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?

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 October 10, 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 October 16, 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 October 16, 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
4,241 reviews

Crew

8.6

Food

7.0

Comfort

8.0

Boarding

8.1

Entertainment

7.5

Overall

8.0

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
4,241 reviews
Southwest
8.0
Very good
4,241 reviews

Crew

8.6

Food

7.0

Comfort

8.0

Boarding

8.1

Entertainment

7.5

Overall

8.0

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
8.0
Very good
7,984 reviews
Southwest
8.0
Very good
4,241 reviews

Crew

8.6

Food

7.0

Comfort

8.0

Boarding

8.1

Entertainment

7.5

Overall

8.0

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
8,982 reviews
Southwest
8.0
Very good
4,241 reviews

Crew

8.6

Food

7.0

Comfort

8.0

Boarding

8.1

Entertainment

7.5

Overall

8.0

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
11,043 reviews
Southwest
8.0
Very good
4,241 reviews

Crew

8.6

Food

7.0

Comfort

8.0

Boarding

8.1

Entertainment

7.5

Overall

8.0

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 $312, Delta can have you in Buffalo from St. Louis in 4h 57m. 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 58% below the average price you’ll pay for this route.

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

    $119 is the cheapest one-way deal found within the past few days, from Delta. You may also be able to find cheap deals on Frontier and American Airlines, with prices starting from $125 and $149, 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for St. Louis to Buffalo

See prices for flight routes from nearby airports that may be better suited for you.
St. Louis to John F Kennedy Intl flights
St. Louis to Newark flights
Kansas City to John F Kennedy Intl flights
St. Louis to LaGuardia flights
Kansas City to Newark flights
Kansas City to LaGuardia flights
Springfield to John F Kennedy Intl flights
Springfield to LaGuardia flights
Springfield to Newark flights
Kansas City to Buffalo flights
Kansas City to Rochester flights
Kansas City to Albany flights
St. Louis to Albany flights
Joplin to LaGuardia flights
Joplin to Newark flights
St. Louis to Syracuse flights
Kansas City to Syracuse flights
Springfield to Buffalo flights
St. Louis to Stewart flights
Columbia to LaGuardia flights
Kansas City to Stewart flights
Springfield to Syracuse flights
Columbia to Newark flights
Kansas City to White Plains flights
St. Louis to Rochester flights
Springfield to White Plains flights
Joplin to Syracuse flights
Columbia to Albany flights
St. Louis to White Plains flights
Columbia to John F Kennedy Intl flights
St. Louis to Elmira flights
Kansas City to Islip flights
St. Louis to Ithaca flights
Kansas City to Ithaca flights
Kansas City to Elmira flights
Columbia to Rochester flights
Columbia to Syracuse flights
St. Louis to Binghamton flights
Springfield to Albany flights
Kansas City to Plattsburgh flights
Columbia to Buffalo flights
Kansas City to Watertown flights
Kansas City to Binghamton flights
St. Louis to Watertown flights
Springfield to Islip flights
St. Louis to Islip flights
Springfield to Stewart flights

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 October 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$167Average$420FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$233Average$371FlexibilityNo cancel feeOn-time71%
DeltaCheapest$238Average$352FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$306Average$404FlexibilityNo cancel feeOn-time63%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.