Airport gate intelligence · SFO
How many gates does San Francisco Airport (SFO) have?
San Francisco Airport (SFO) has 108 gates, with about 559 airline departures a day. United has the most (47), followed by Alaska (8).
United flies 56% of the 89,249 seats leaving SFO each day. United has 488% more gates and 528% more seats than Alaska. 25 gates are common use, shared by several airlines.
Gates, seats and flights by airline at SFO
| Airline | Gates held | Departures a day | Seats out a day | Share of seats | Seats per departure | Regional jets | Median turn | Tows a week |
|---|---|---|---|---|---|---|---|---|
| United | 47 | 298 | 49,679 | 56% | 167 | 19% | 83 min | 251 |
| Alaska | 8 | 56 | 7,916 | 9% | 141 | 34% | 59 min | 49 |
| American | 7 | 46 | 8,089 | 9% | 174 | 11% | 69 min | 42 |
| Delta | 7 | 45 | 7,931 | 9% | 177 | 4% | 73 min | 6 |
| Southwest | 3 | 32 | 5,305 | 6% | 166 | 0% | 55 min | 13 |
| JetBlue | 2 | 13 | 2,514 | 3% | 200 | 0% | 96 min | 1 |
| Frontier | 2 | 12 | 2,488 | 3% | 206 | 0% | 64 min | 0 |
| Air Canada | 1 | 8 | 1,108 | 1% | 132 | 18% | 59 min | 9 |
| Common use (shared) | 25 | |||||||
Average of 19 full days, Oct 1 to Oct 21, 2026. Gates held = the airline flying the gate most (regional partners count as their brand); 6 gates saw few or no flights (not in use or under repair). Seats are capacity, from each airline’s seat map per aircraft type; 5% of flights have no seat count yet.
On-time departures by airline at SFO
76% 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 |
|---|---|---|---|
| American | 46 | 79% | 21% |
| United | 298 | 79% | 21% |
| Delta | 45 | 78% | 22% |
| Alaska | 56 | 72% | 28% |
| JetBlue | 13 | 66% | 34% |
| Frontier | 12 | 63% | 37% |
| Southwest | 32 | 46% | 54% |
On time = left the gate less than 15 minutes after its scheduled time. Average of 19 full days.
What size aircraft SFO’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 SFO: terminals, gates and nonstop routes
Other airlines
Seen on only one of the full days collected (charters and occasional flights): Air Incheon (17 flights); 2I (15 flights); AN (1 flight); 5E (1 flight).
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SFO gate questions
How many gates does San Francisco Airport (SFO) have?
San Francisco Airport (SFO) has 108 gates, with about 559 airline departures a day. United has the most (47), followed by Alaska (8).
Which airline has the most gates at San Francisco Airport (SFO)?
United, with 47 of the 108 gates at SFO (the airline flying each gate most; regional partners count as their brand).
How many flights a day leave San Francisco Airport (SFO)?
About 559 airline departures a day (Oct 1 to Oct 21, 2026).
Which terminal is United in at SFO?
United flies from Terminal 3’s Concourses F and E, Terminal 2’s Concourse D and Terminal I’s Concourse G at San Francisco Airport (SFO).
How many gates does United have at SFO?
47 gates, with about 298 departures and 49,679 seats a day.
How many gates does Alaska have at SFO?
8 gates, with about 56 departures and 7,916 seats a day.
How many gates does American have at SFO?
7 gates, with about 46 departures and 8,089 seats a day.
How many seats leave SFO each day?
About 89,249 seats on 559 airline departures a day (average of 19 full days, Oct 1 to Oct 21, 2026).
What is the typical turn time at SFO?
79 minutes at the gate from arrival to departure (median of every turn measured).
Which airline leaves SFO on time most often?
American Airlines: 79% of its departures left the gate less than 15 minutes after their scheduled time, against 76% for all airlines at SFO (19 full days, Oct 1 to Oct 21, 2026).
How often do flights at SFO go back to the gate after pushing back?
51 departures in 19 days probably went back to the gate before taking off (a mechanical problem, fuel, a passenger taken off), and 4 came back and changed planes.
How many aircraft tows happen at SFO?
About 388 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.