Airport gate intelligence · STL
How many gates does St. Louis Airport (STL) have?
St. Louis Airport (STL) has 54 gates, with about 188 airline departures a day. Southwest has the most (17), followed by American (8).
Southwest flies 64% of the 27,251 seats leaving STL each day. Southwest has 112% more gates and 367% more seats than American. 1 gate is common use, shared by several airlines.
Gates, seats and flights by airline at STL
| Airline | Gates held | Departures a day | Seats out a day | Share of seats | Seats per departure | Regional jets | Median turn | Tows a week |
|---|---|---|---|---|---|---|---|---|
| Southwest | 17 | 105 | 17,351 | 64% | 165 | 0% | 58 min | 2 |
| American | 8 | 30 | 3,717 | 14% | 124 | 39% | 51 min | 35 |
| United | 7 | 22 | 2,391 | 9% | 107 | 55% | 68 min | 21 |
| Delta | 6 | 21 | 2,583 | 9% | 125 | 42% | 66 min | 0 |
| Frontier | 2 | 3 | 612 | 2% | 204 | 0% | 52 min | 0 |
| Alaska | 1 | 2 | 343 | 1% | 172 | 0% | 72 min | 0 |
| Air Canada | 1 | 3 | 228 | 1% | 76 | 100% | – | 5 |
| Common use (shared) | 1 | |||||||
Average of 3 full days, Oct 3 to Oct 5, 2026. Gates held = the airline flying the gate most (regional partners count as their brand); 11 gates have too few flights yet. Seats are capacity, from each airline’s seat map per aircraft type; 1% of flights have no seat count yet.
On-time departures by airline at STL
77% of departures left the gate on time (less than 15 minutes after their scheduled time). Airlines with 10+ departures a day.
| Airline | Departures a day | On time | 15+ min late |
|---|---|---|---|
| United | 22 | 91% | 9% |
| Delta | 21 | 90% | 10% |
| American | 30 | 78% | 22% |
| Southwest | 105 | 70% | 30% |
On time = left the gate less than 15 minutes after its scheduled time. Average of 3 full days.
What size aircraft STL’s gates handle
Gates by the largest aircraft seen there at least twice. A gate that takes a wide-body also takes anything smaller.
Airlines at STL: terminals, gates and nonstop routes
Other airlines
Seen on only one of the full days collected (charters and occasional flights): Sun Country (20 flights to Atlantic City); British Airways (6 flights to London Heathrow); Contour (1 flight).
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STL gate questions
How many gates does St. Louis Airport (STL) have?
St. Louis Airport (STL) has 54 gates, with about 188 airline departures a day. Southwest has the most (17), followed by American (8).
Which airline has the most gates at St. Louis Airport (STL)?
Southwest, with 17 of the 54 gates at STL (the airline flying each gate most; regional partners count as their brand).
How many flights a day leave St. Louis Airport (STL)?
About 188 airline departures a day (Oct 3 to Oct 5, 2026).
Which terminal is Southwest in at STL?
Southwest flies from Terminal 2’s Concourse E at St. Louis Airport (STL).
How many gates does Southwest have at STL?
17 gates, with about 105 departures and 17,351 seats a day.
How many gates does American have at STL?
8 gates, with about 30 departures and 3,717 seats a day.
How many gates does United have at STL?
7 gates, with about 22 departures and 2,391 seats a day.
How many seats leave STL each day?
About 27,251 seats on 188 airline departures a day (average of 3 full days, Oct 3 to Oct 5, 2026).
What is the typical turn time at STL?
59 minutes at the gate from arrival to departure (median of every turn measured).
Which airline leaves STL on time most often?
United Airlines: 91% of its departures left the gate less than 15 minutes after their scheduled time, against 77% for all airlines at STL (3 full days, Oct 3 to Oct 5, 2026).
How often do flights at STL go back to the gate after pushing back?
2 departures in 3 days probably went back to the gate before taking off (a mechanical problem, fuel, a passenger taken off).
How many aircraft tows happen at STL?
About 63 tows a week: a plane that arrives at one gate and leaves from another was towed between them. Planes we didn't see arrive aren't counted.