St Louis

STL · KSTL

St. Louis Lambert International Airport

38.75°, -90.37°MO, United States

Passengers a year

14.9M

#35 busiest in the U.S.

76

nonstop destinations

43

airlines

195

departures a day

79.0%

arrivals on time

1.2%

flights cancelled

75.9%

load factor

The ten busiest routes from STL, by passengers: DEN, ATL, MCO, ORD, PHX, LGA, LAS, DFW, CLT, DALSTLDENORDLGACLTATLMCODALDFWPHXLAS
Nonstop routes — the ten busiest. Filed traffic, June 2025 – May 2026.

Airlines

Southwest Airlines is the largest carrier at St Louis, with 63% of all passengers. 43 airlines fly from here.

Share of passengers · each carrier as a slice of the whole airport

Southwest Airlines holds 63% of the airport — the 6th most concentrated of 35 medium hubs. The nearest comparison is ANC at 69%.

AirlineSharePassengersSeats YoY
WN
Southwest74% full
63.1%9.4M-1.3%
AA
American78% fullAmerican Eagle · operated by Envoy, Republic, SkyWest, PSA, Piedmont
13.4%2M-0.9%
DL
Delta78% fullDelta Connection · operated by Endeavor, SkyWest, Republic
9.8%1.5M+0.8%
UA
United80% fullUnited Express · operated by GoJet, Republic, Mesa, SkyWest, CommuteAir
7.2%1.1M-1.2%
F9
Frontier71% full
3.6%541.9K+16.7%
+Other airlines
3.0%441.6K—

Share, passengers and destinations count each airline’s own flights plus the regional flying sold under its brand. On-time covers the airline's own aircraft only — regional affiliates report to the government separately. Seats year on year compares the latest twelve months against the twelve before them.

Destinations

67 domestic and 9 international nonstop destinations from St Louis, across 8 countries.

97% domestic · 3% international · by departing passengers

Top domestic destinations

  • Denver (DEN)

    470K departing · 80% full

    Southwest Airlines · United Airlines · Frontier Airlines

  • Atlanta (ATL)

    453.8K departing · 74% full

    Delta Air Lines · Southwest Airlines · Frontier Airlines

  • Orlando (MCO)

    323.9K departing · 75% full

    Southwest Airlines · Frontier Airlines

  • Chicago (ORD)

    308.5K departing · 76% full

    United Airlines · American Airlines

  • Phoenix (PHX)

    297.1K departing · 81% full

    Southwest Airlines · American Airlines

  • New York (LGA)

    286.9K departing · 76% full

    Southwest Airlines · Delta Air Lines · American Airlines

  • Las Vegas (LAS)

    270.9K departing · 75% full

    Southwest Airlines · Frontier Airlines

  • Dallas-Fort Worth (DFW)

    263.3K departing · 81% full

    American Airlines · Frontier Airlines

  • Charlotte (CLT)

    226.8K departing · 80% full

    American Airlines · Southwest Airlines

  • Dallas (DAL)

    214.7K departing · 70% full

    Southwest Airlines

Top international destinations

  • Cancún, Mexico (CUN)

    121.5K departing · 245.4K both ways

    Frontier Airlines · Southwest Airlines

  • Frankfurt am Main, Germany (FRA)

    32.9K departing · 65.6K both ways

    Lufthansa

  • Punta Cana, Dominican Republic (PUJ)

    25.7K departing · 52.1K both ways

    Frontier Airlines · Southwest Airlines

  • Toronto, Canada (YYZ)

    25.3K departing · 50.5K both ways

    Air Canada

  • Montréal, Canada (YUL)

    8.7K departing · 17.1K both ways

    Air Canada

  • London, United Kingdom (LHR)

    4.2K departing · 8.5K both ways

    British Airways

  • San José del Cabo, Mexico (SJD)

    3.3K departing · 7.2K both ways

    Southwest Airlines

  • Montego Bay, Jamaica (MBJ)

    3.2K departing · 6.6K both ways

    Southwest Airlines

  • Puerto Vallarta, Mexico (PVR)

    1K departing · 2.1K both ways

    Alaska Airlines

All nonstop destinations

76 nonstop · 11 airlines · 67 domestic / 9 intl

Aircraft

By share of departures at St Louis.

Body class · share of departures

When St Louis is busiest

Departures by month over the trailing year. Bars scale to the busiest month.

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Jan

Feb

Mar

Apr

May

Departures a month · peak July 2025

Annual passengers since 1990

Total passengers, arriving and departing, in every year on record.

Passengers a year

Every year
1990
20,005,675
1991
19,938,260
1992
22,065,287
1993
21,266,019
1994
24,877,478
1995
27,249,931
1996
28,934,045
1997
29,819,155
1998
30,437,193
1999
31,902,280
2000
32,061,910
2001
27,201,570
2002
25,044,854
2003
20,827,095
2004
13,413,203
2005
14,488,433
2006
14,986,457
2007
15,229,146
2008
14,421,661
2009
12,954,627
2010
12,808,463
2011
13,171,332
2012
13,179,604
2013
13,152,127
2014
12,877,848
2015
13,002,443
2016
14,044,236
2017
14,906,495
2018
15,749,131
2019
15,950,440
2020
6,440,052
2021
10,459,139
2022
13,844,916
2023
15,084,860
2024
15,764,098
2025
15,070,624
2026
5,654,359 so far

Arriving on time

Of every 100 flights landing at St Louis, 79 touch down within 15 minutes of schedule, 20 arrive late, and 1 is cancelled.

See live FAA delays

Every 100 arrivals

On time 79Late 20Cancelled 1

14 min

average delay

775

flights cancelled

62.5K

arrivals measured

What holds flights up

Share of delay minutes

Most reliable here

Delta Air Lines 82.7%

Least reliable here

American Airlines 71.9%

Among US airports

#35

On time, month by month

Darker is better · 73%–85.7%

The weak spot is June 2026, when 73% of arrivals landed on time — 6 points below the year. The strongest was September 2025 at 85.7%.

Frequently asked

How busy is St. Louis Lambert International Airport (STL)?

St. Louis Lambert International Airport handled about 14.9M passengers over the trailing 12 months, ranking #35 among U.S. airports by passengers, with roughly 195 departures a day.

Which airline is the largest at St. Louis Lambert International Airport (STL)?

Southwest Airlines is the largest carrier at St Louis (STL), flying about 63% of its passengers. 43 airlines serve St Louis in total.

How many places can you fly nonstop from St. Louis Lambert International Airport (STL)?

St Louis (STL) has 76 nonstop destinations — 67 domestic and 9 international across 8 countries.

How often do flights arrive on time at St. Louis Lambert International Airport (STL)?

About 79.0% of flights arriving at St Louis (STL) touch down within 15 minutes of schedule, per US DOT figures. About 1.2% are cancelled.

What aircraft flies most from St. Louis Lambert International Airport (STL)?

The Boeing 737-700 flew the largest share of departures from St Louis (STL), about 21% of the total.

Trip reports on YouTube

Fliers post trip reports from flights through St Louis (STL) to YouTube. These three were matched automatically from public YouTube listings — The Frequent Flier does not host, review, or endorse them.

  • BrandonJohnson10K

    Alaska Airlines Premium Class STL-SEA 737 MAX9 Trip Report

    8:48 · Oct 2023

    Watch on YouTube

  • QFS Aviation

    TRIP REPORT | American Airlines - E175 - St. Louis (STL) to New York (LGA | Economy

    9:53 · Nov 2017

    Watch on YouTube

  • OrlandoAviation

    TRIP REPORT | Southwest Airlines Boeing 737-7H4 (ECONOMY) | Columbus (CMH) - St. Louis Lambert (STL)

    10:41 · Oct 2020

    Watch on YouTube

Source: YouTube. Titles, thumbnails, and channel names come from YouTube. Playing a video loads the YouTube player, and using it means you agree to the YouTube Terms of Service; the Google Privacy Policy applies.

Departing counts passengers leaving St Louis; international destinations also show both directions. Data: traffic June 2025 – May 2026, on-time July 2025 – June 2026. Source: US DOT Bureau of Transportation Statistics (T-100 Segment, On-Time Performance).