St. Louis Lambert International ⇄ San Francisco International STL–SFO
Airlines flew 1,508 flights between St. Louis Lambert International STL in St Louis, MO and San Francisco International SFO in San Francisco, CA in the twelve months to July 2026, both directions together: 171,225 passengers in 204,708 seats, 84% of them filled, and 195,177 pounds of freight. 1,735 miles, about 241 minutes in the air, on 5 airlines: Southwest Airlines Co. (680), SkyWest Airlines Inc. (456), United Air Lines Inc. (369), American Airlines Inc. (2) and 1 more. Planning to fly it yourself? The weather and winds along this route right now.
Flights by month both directions
By month, as a table
| flights | |
|---|---|
| 1/25 | 113 |
| 2/25 | 106 |
| 3/25 | 124 |
| 4/25 | 120 |
| 5/25 | 164 |
| 6/25 | 164 |
| 7/25 | 164 |
| 8/25 | 124 |
| 9/25 | 120 |
| 10/25 | 123 |
| 11/25 | 114 |
| 12/25 | 121 |
| 1/26 | 133 |
| 2/26 | 119 |
| 3/26 | 117 |
| 4/26 | 150 |
| 5/26 | 143 |
| 6/26 | 121 |
| 7/26 | 123 |
Passengers by month
By month, as a table
| passengers | |
|---|---|
| 1/25 | 12,945 |
| 2/25 | 10,936 |
| 3/25 | 14,592 |
| 4/25 | 14,885 |
| 5/25 | 21,043 |
| 6/25 | 21,755 |
| 7/25 | 21,720 |
| 8/25 | 16,401 |
| 9/25 | 14,596 |
| 10/25 | 13,681 |
| 11/25 | 15,723 |
| 12/25 | 13,773 |
| 1/26 | 10,837 |
| 2/26 | 11,034 |
| 3/26 | 11,926 |
| 4/26 | 13,472 |
| 5/26 | 15,058 |
| 6/26 | 17,529 |
| 7/26 | 17,195 |
The airlines twelve months, both directions
| Airline | Flights | Passengers | Seats filled | Service |
|---|---|---|---|---|
| Southwest Airlines Co. WN | 680 | 100,787 | 89% | scheduled passenger service |
| SkyWest Airlines Inc. OO | 456 | 26,152 | 80% | scheduled passenger service |
| United Air Lines Inc. UA | 369 | 43,902 | 76% | scheduled passenger service |
| American Airlines Inc. AA | 2 | 241 | 88% | scheduled passenger service |
| Alaska Airlines Inc. AS | 1 | 143 | 89% | scheduled passenger service |
The aircraft as the airlines report their types
| Aircraft | Flights | Seats a flight | Passengers |
|---|---|---|---|
| Embraer ERJ-175 | 456 | 72 | 26,152 |
| Boeing B737 Max 800 | 452 | 171 | 64,338 |
| Boeing 737-800 | 288 | 175 | 43,806 |
| Boeing 737-700/700LR/Max 7 | 149 | 140 | 18,469 |
| Airbus Industrie A319 | 94 | 126 | 9,944 |
| Boeing B737 Max 900 | 45 | 179 | 5,885 |
| Airbus Industrie A320-100/200 | 19 | 150 | 1,974 |
| Boeing 737-900ER | 4 | 179 | 568 |
| Airbus Industrie A321Neoxlr | 1 | 102 | 89 |
STL → SFO this direction alone · flown January 2025 to July 2026
756 flights of 756 scheduled, 85,392 passengers in 102,857 seats, 104,983 pounds of freight. Southwest Airlines Co. 341; SkyWest Airlines Inc. 228; United Air Lines Inc. 186; Alaska Airlines Inc. 1.
SFO → STL this direction alone · flown January 2025 to July 2026
752 flights of 755 scheduled, 85,833 passengers in 101,851 seats, 90,194 pounds of freight. Southwest Airlines Co. 339; SkyWest Airlines Inc. 228; United Air Lines Inc. 183; American Airlines Inc. 2.
Source: the Bureau of Transportation Statistics' T-100 Segment table (all carriers). A flight is one departure performed on this segment; seats and passengers are the airlines' own monthly reports; "seats filled" is passengers divided by seats. The miles are the DOT's great-circle distance. Both ends: St. Louis Lambert International STL and San Francisco International SFO; all routes.