San Francisco (SFO) to St Louis (STL)
Flight time
≈ 4h 16m
Bearing
77° E
San Francisco (SFO) to St Louis (STL) is 1,731 miles (2,786 km) as the crow flies — the great-circle baseline most distance-based mileage programs credit.
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What actually flies SFO–STL
Filed traffic dataIn May 2026, SkyWest Airlines operated the most departures, one of 4 carriers flying nonstop SFO–STL; the Embraer E175 was the most common aircraft at 48% of departures; flights ran 86% full.
Departures
143
May 2026
Seats
17,568
both directions
Passengers
15,058
both directions
Load factor
85.7%
RPM ÷ ASM
Who flies SFO–STL?
SkyWest Airlines operated the most nonstop SFO–STL departures in May 2026 (68), one of 4 carriers on the route.
- OO
68 departures · 4,832 seats
Share of departures47.6%82.3%
Load
- WN
52 departures · 8,834 seats
Share of departures36.4%90.3%
Load
- UA
22 departures · 3,730 seats
Share of departures15.4%79.2%
Load
- AA
1 departures · 172 seats
Share of departures0.7%88.4%
Load
What plane flies SFO–STL?
In May 2026, the Embraer E175 flew 48% of SFO–STL departures — more than any other aircraft type.
- Embraer E175
68 departures · 82.3% load
47.5% - Boeing 737 MAX 8
44 departures · 86.7% load
30.8% - Boeing 737-800
18 departures · 91.7% load
12.6% - Boeing 737-700
7 departures · 79.3% load
4.9% - Boeing 737 MAX 9
4 departures · 80.5% load
2.8% - Boeing 737-900ER
2 departures · 86.0% load
1.4%
How has SFO–STL traffic changed?
Nonstop SFO–STL departures fell from 164 in June 2025 to 143 in May 2026.
Monthly nonstop SFO–STL traffic, trailing 12 months through May 2026. Bars scale to the busiest month; months with no filed service show as zero.
June 2025
164 departures · 21,755 passengers
78.6%
Load
July 2025
164 departures · 21,720 passengers
83.2%
Load
August 2025
124 departures · 16,401 passengers
89.3%
Load
September 2025
120 departures · 14,596 passengers
86.8%
Load
October 2025
123 departures · 13,681 passengers
85.0%
Load
November 2025
114 departures · 15,723 passengers
81.5%
Load
December 2025
121 departures · 13,773 passengers
78.4%
Load
January 2026
133 departures · 10,837 passengers
75.3%
Load
February 2026
119 departures · 11,034 passengers
78.8%
Load
March 2026
117 departures · 11,926 passengers
85.4%
Load
April 2026
150 departures · 13,472 passengers
85.4%
Load
May 2026
143 departures · 15,058 passengers
85.7%
Load
By direction
Each direction is filed separately — they rarely match.
SFO → STL
84.0% full
72 departures · 7,340 passengers
STL → SFO
87.4% full
71 departures · 7,718 passengers
Nonstop SFO–STL traffic has been filed since 2025.
Source: US DOT BTS Form 41 T-100 Segment (All Carriers). Data through May 2026; filings from 2025. Public domain (US Government work).
The airports
Frequently asked
How far is San Francisco (SFO) from St Louis (STL)?
SFO to STL is 1,731 miles (2,786 km / 1,504 nautical miles) measured great-circle — the shortest path over the surface of the Earth.
How long is the flight from SFO to STL?
A nonstop covers the 1,731-mile great-circle distance in roughly 4h 16m of block time, before winds. Actual schedules vary a few percent by direction and aircraft.
What plane flies SFO–STL?
In May 2026, the Embraer E175 flew the largest share of departures (47.5%), followed by the Boeing 737 MAX 8 (30.8%).
What mileage do I earn flying SFO–STL?
Distance-based programs credit off the 1,731-mile great-circle figure, then apply your fare-class earning rate. Revenue-based programs credit off the fare instead.
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