$139+ 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
Jan 22 — Jan 291
1 adult, Economy
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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 January or November, booked 23 days in advance, depart on a Wednesday or Sunday and return on a Wednesday
Cheap flight deals from St. Louis to Buffalo
Cheapest flights from St. Louis to BuffaloExplore 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 December 23, 2025.
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 December 23, 2025.
This Delta deal was found by Cheapflights users on 12/22. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3010:04 amSTL - BUF
1 stop6h 08mDelta
Sat 1/36:00 amBUF - STL
1 stop7h 03mDelta
Deal found 12/22![Delta logo]()
$577
This Delta deal was found by Cheapflights users on 12/21. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/244:52 pmSTL - BUF
1 stop21h 17mDelta
Sun 12/286:54 pmBUF - STL
1 stop5h 48mDelta
Deal found 12/21![Delta logo]()
$582
This Kiwi.com deal was found by Cheapflights users on 12/21. 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.
Mon 12/2210:40 amSTL - BUF
1 stop25h 12mFrontier
Sat 1/38:14 pmBUF - STL
2 stops14h 26mFrontier
Deal found 12/21![Frontier logo]()
$586
This Delta deal was found by Cheapflights users on 12/21. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/254:52 pmSTL - BUF
1 stop21h 17mDelta
Sun 12/286:54 pmBUF - STL
1 stop5h 48mDelta
Deal found 12/21![Delta logo]()
$630
This Delta deal was found by Cheapflights users on 12/21. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/255:13 pmSTL - BUF
2 stops20h 56mDelta
Tue 12/306:10 amBUF - STL
1 stop4h 14mDelta
Deal found 12/21![Delta logo]()
$635
This American Airlines deal was found by Cheapflights users on 12/21. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/276:35 pmSTL - BUF
1 stop4h 37mAmerican Airlines
Mon 12/297:15 pmBUF - STL
1 stop5h 40mAmerican Airlines
Deal found 12/21![American Airlines logo]()
$658
This Delta deal was found by Cheapflights users on 12/21. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/226:29 amSTL - BUF
1 stop3h 52mDelta
Tue 12/306:10 amBUF - STL
1 stop4h 14mDelta
Deal found 12/21![Delta logo]()
$667
This Southwest deal was found by Cheapflights users on 12/21. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/245:10 amSTL - BUF
2 stops8h 10mSouthwest
Sun 12/285:00 amBUF - STL
1 stop8h 30mSouthwest
Deal found 12/21![Southwest logo]()
$672
This Delta deal was found by Cheapflights users on 12/21. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/244:52 pmSTL - BUF
1 stop21h 17mDelta
Mon 12/296:10 amBUF - STL
1 stop4h 14mDelta
Deal found 12/21![Delta logo]()
$673
This Kiwi.com deal was found by Cheapflights users on 12/21. 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.
Tue 12/2310:48 amSTL - BUF
2 stops32h 52mFrontier
Mon 12/295:40 pmBUF - STL
1 stop17h 00mFrontier
Deal found 12/21![Frontier logo]()
$703
This Southwest deal was found by Cheapflights users on 12/21. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/227:50 amSTL - BUF
2 stops5h 45mSouthwest
Sat 1/311:20 amBUF - STL
2 stops6h 55mSouthwest
Deal found 12/21![Southwest logo]()
$708
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 December 23, 2025.
Most accurate provider | eDreams 3 stars |
|---|---|
Most trusted provider | eDreams 3 stars |
Round-trip from | $247 (Frontier) |
One-way from | $139 (Delta) |
Popular in | December |
Cheapest in | January |
Average price | $516 |
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 December 23, 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
Fri 1/30
11:18 am-6:36 pm
1 stop6h 18m
Buffalo
Sat 1/31
12:29 pm-11:33 pm
1 stop12h 04m
$247
St. LouisBuffalo
STL - BUF
STLBUF
Lambert-St Louis
Wed 3/11
5:15 pm-11:13 pm
1 stop4h 58m
Buffalo
Mon 3/16
7:38 pm-11:58 pm
1 stop5h 20m
$322
St. LouisBuffalo
STL - BUF
STLBUF
Lambert-St Louis
Sat 1/17
8:30 am-2:14 pm
1 stop4h 44m
Buffalo
Tue 1/20
6:20 pm-11:59 pm
1 stop6h 39m
$327
St. LouisBuffalo
STL - BUF
STLBUF
Lambert-St Louis
Fri 3/6
7:52 am-8:30 pm
1 stop11h 38m
Buffalo
Sun 3/8
9:25 pm-7:07 am
1 stop10h 42m
$331
St. LouisBuffalo
STL - BUF
STLBUF
Lambert-St Louis
Wed 3/11
5:15 pm-11:13 pm
1 stop4h 58m
$139
St. LouisBuffalo
STL - BUF
STLBUF
Lambert-St Louis
Wed 3/11
6:00 am-12:14 pm
1 stop5h 14m
$139
St. LouisBuffalo
STL - BUF
STLBUF
Lambert-St Louis
Wed 3/11
10:00 am-6:42 pm
2 stops7h 42m
$144
St. LouisBuffalo
STL - BUF
STLBUF
Lambert-St Louis
Mon 12/29
10:40 am-12:52 pm
1 stop25h 12m
$182
St. LouisBuffalo
STL - BUF
STLBUF
Lambert-St Louis
Tue 12/30
4:27 pm-4:49 pm
2 stops23h 22m
$258
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 December.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars |
- 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 December 19, 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 $136). Flying from St. Louis to Buffalo in April is currently the most expensive (average of $281). 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 December 23, 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 December 23, 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.
Overall
8.0
Boarding
8.1
Comfort
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Overall
8.0
Boarding
8.1
Comfort
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Overall
8.0
Boarding
8.1
Comfort
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Overall
8.0
Boarding
8.1
Comfort
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Overall
8.0
Boarding
8.1
Comfort
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
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.
Traveling to a place near Buffalo?
Book flights to Buffalo if you plan to visit one of these locationsLockport
Cheektowaga
Batavia
Williamsville
Orchard Park
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.
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 December 23, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$167 | Average$420 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$221 | Average$351 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$236 | Average$343 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$306 | Average$416 | FlexibilityNo cancel fee | On-time63% |