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$105+ 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 9/3. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BUF
ago 16 — ago 231
sab 8/16
sab 8/23
1 adult, Economy
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Cheapflights Tip: The best prices from Lambert-St Louis to Buffalo are usually found in September or October, booked 23 days in advance, depart on a Wednesday or Sunday and return on a Wednesday

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 agosto 11, 2025.

Round-trip from

$222
(American Airlines)

One-way from

$105
(American Airlines)

Popular in

January

Cheapest in

September

Average price

$474
From Lambert-St Louis to Buffalo
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One-way flight from Lambert-St Louis to Buffalo
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Highest demand for flights based on searches. 21% potential increase in price ($110 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($21 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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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 agosto 11, 2025.

This American Airlines deal was found by Cheapflights users on 8/10. 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.
gio 11/134:48 pmSTL - BUF
1 stop5h 48mAmerican Airlines
mar 11/1812:56 pmBUF - STL
1 stop4h 40mAmerican Airlines
Deal found 8/10$223
This Delta deal was found by Cheapflights users on 8/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun 9/84:20 pmSTL - BUF
1 stop7h 38mDelta
sab 9/136:00 amBUF - STL
1 stop7h 21mDelta
Deal found 8/10$237
This Southwest deal was found by Cheapflights users on 8/9. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun 9/85:25 amSTL - BUF
2 stops5h 35mSouthwest
gio 9/116:55 amBUF - STL
1 stop6h 35mSouthwest
Deal found 8/9$242
This United Airlines deal was found by Cheapflights users on 8/9. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun 9/83:20 pmSTL - BUF
1 stop4h 56mUnited Airlines
ven 9/1210:55 amBUF - STL
1 stop5h 49mUnited Airlines
Deal found 8/9$244
This American Airlines deal was found by Cheapflights users on 8/8. 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.
sab 11/154:48 pmSTL - BUF
1 stop5h 48mAmerican Airlines
lun 11/176:00 amBUF - STL
1 stop6h 02mAmerican Airlines
Deal found 8/8$258
This Southwest deal was found by Cheapflights users on 8/10. 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.
ven 11/145:05 pmSTL - BUF
1 stop5h 35mSouthwest
lun 11/176:30 pmBUF - STL
1 stop4h 50mSouthwest
Deal found 8/10$265
This Southwest deal was found by Cheapflights users on 8/10. 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.
sab 11/151:55 pmSTL - BUF
1 stop7h 20mSouthwest
lun 11/176:30 pmBUF - STL
1 stop4h 50mSouthwest
Deal found 8/10$279
This FlightHub deal was found by Cheapflights users on 8/9. 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.
mer 8/135:40 pmSTL - BUF
1 stop14h 12mFrontier
ven 8/152:11 pmBUF - STL
1 stop20h 00mFrontier
Deal found 8/9$283
This FlightHub deal was found by Cheapflights users on 8/10. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer 8/135:40 pmSTL - BUF
1 stop14h 12mFrontier
dom 8/179:12 pmBUF - STL
1 stop27h 35mFrontier
Deal found 8/10$291
This United Airlines deal was found by Cheapflights users on 8/9. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
gio 10/165:00 amSTL - BUF
1 stop3h 53mUnited Airlines
dom 10/197:07 amBUF - STL
1 stop4h 42mUnited Airlines
Deal found 8/9$294
This FlightHub deal was found by Cheapflights users on 8/9. 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.
gio 9/184:00 pmSTL - BUF
1 stop18h 22mFrontier
dom 9/214:57 pmBUF - STL
1 stop17h 09mFrontier
Deal found 8/9$295

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 agosto 11, 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

gio 11/13

4:48 pm-11:36 pm

1 stop5h 48m

Buffalo

mar 11/18

12:56 pm-4:36 pm

1 stop4h 40m

$223

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

lun 9/8

3:42 pm-11:57 pm

1 stop7h 15m

Buffalo

sab 9/13

5:10 pm-10:00 pm

1 stop5h 50m

$237

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

lun 9/8

5:25 am-12:00 pm

2 stops5h 35m

Buffalo

gio 9/11

6:55 am-12:30 pm

1 stop6h 35m

$242

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

lun 9/8

3:20 pm-9:16 pm

1 stop4h 56m

Buffalo

ven 9/12

10:55 am-3:44 pm

1 stop5h 49m

$244

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

sab 11/15

4:48 pm-11:36 pm

1 stop5h 48m

Buffalo

lun 11/17

6:00 am-11:02 am

1 stop6h 02m

$258

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

ven 11/14

5:05 pm-11:40 pm

1 stop5h 35m

Buffalo

lun 11/17

6:30 pm-10:20 pm

1 stop4h 50m

$265

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

sab 11/15

1:55 pm-10:15 pm

1 stop7h 20m

Buffalo

lun 11/17

6:30 pm-10:20 pm

1 stop4h 50m

$279

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

lun 9/8

5:25 am-12:00 pm

2 stops5h 35m

Buffalo

ven 9/12

4:10 pm-11:25 pm

1 stop8h 15m

$283

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

gio 10/16

5:00 am-9:53 am

1 stop3h 53m

Buffalo

dom 10/19

7:07 am-10:49 am

1 stop4h 42m

$294

St. LouisBuffalo

STL - BUF

STLBUF

Lambert-St Louis

gio 9/18

4:00 pm-11:22 am

1 stop18h 22m

Buffalo

dom 9/21

4:57 pm-9:06 am

1 stop17h 09m

$295

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/10

Showing 1-10 of 20 results
1
2

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 August 8, 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, January is the cheapest month in which you can book a flight from St. Louis to Buffalo (average of $256). Flying from St. Louis to Buffalo in December is currently the most expensive (average of $337). 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 agosto 11, 2025.

It’s optimal to fly from St. Louis to Buffalo in the evening. By choosing this option you can save up to 34% 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 agosto 11, 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
4,248 reviews

Boarding

8.1

Entertainment

7.5

Overall

8.0

Comfort

8.0

Food

7.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Southwest
8.0
Very good
4,248 reviews
Southwest
8.0
Very good
4,248 reviews

Boarding

8.1

Entertainment

7.5

Overall

8.0

Comfort

8.0

Food

7.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Delta
8.0
Very good
7,979 reviews
Southwest
8.0
Very good
4,248 reviews

Boarding

8.1

Entertainment

7.5

Overall

8.0

Comfort

8.0

Food

7.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
United Airlines
7.4
Good
8,920 reviews
Southwest
8.0
Very good
4,248 reviews

Boarding

8.1

Entertainment

7.5

Overall

8.0

Comfort

8.0

Food

7.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,248 reviews

Boarding

8.1

Entertainment

7.5

Overall

8.0

Comfort

8.0

Food

7.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Frontier
5.8
Fair
3,221 reviews
Southwest
8.0
Very good
4,248 reviews

Boarding

8.1

Entertainment

7.5

Overall

8.0

Comfort

8.0

Food

7.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.

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.

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

    According to our current data, American Airlines ($223), Delta ($237), and Southwest ($242) offers the cheapest pricing from St. Louis to Buffalo. American Airlines is currently priced 45% below the average price you’ll pay for this route.

  • 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, January is the cheapest month in which you can book a flight from St. Louis to Buffalo (average of $256). Flying from St. Louis to Buffalo in December is currently the most expensive (average of $337). 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
Orchard Park
Lockport
Batavia
Williamsville
Eden
Amherst
West Seneca

Browse thousands of different options on Cheapflights for your next trip

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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 agosto 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$179Average$395FlexibilityNo cancel feeOn-time69%
DeltaCheapest$243Average$352FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$250Average$376FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$306Average$406FlexibilityNo cancel feeOn-time63%

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