San Diego (SAN) to St Louis (STL)
Flight time
≈ 3h 54m
Bearing
67° NE
San Diego (SAN) to St Louis (STL) is 1,554 miles (2,501 km) as the crow flies — the great-circle baseline most distance-based mileage programs credit.
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What actually flies SAN–STL
Filed traffic dataIn July 2026, Southwest Airlines operated the most departures, one of 4 carriers flying nonstop SAN–STL; the Boeing 737 MAX 8 was the most common aircraft at 47% of departures; flights ran 90% full.
Departures
79
July 2026
Seats
13,335
both directions
Passengers
12,000
both directions
Load factor
90.0%
RPM ÷ ASM
Who flies SAN–STL?
Southwest Airlines operated the most nonstop SAN–STL departures in July 2026 (76), one of 4 carriers on the route.
- WN
76 departures · 12,806 seats
Share of departures96.2%90.5%
Load
- AA
1 departures · 172 seats
Share of departures1.3%97.7%
Load
- AS
1 departures · 178 seats
Share of departures1.3%96.6%
Load
- UA
1 departures · 179 seats
Share of departures1.3%41.9%
Load
What plane flies SAN–STL?
In July 2026, the Boeing 737 MAX 8 flew 47% of SAN–STL departures — more than any other aircraft type.
- Boeing 737 MAX 8
37 departures · 90.3% load
46.8% - Boeing 737-800
27 departures · 92.8% load
34.2% - Boeing 737-700
13 departures · 85.4% load
16.5% - Boeing 737 MAX 9
1 departures · 96.6% load
1.3% - Boeing 737-900ER
1 departures · 41.9% load
1.3%
How has SAN–STL traffic changed?
Nonstop SAN–STL departures rose from 73 in August 2025 to 79 in July 2026.
Monthly nonstop SAN–STL traffic, trailing 12 months through July 2026. Bars scale to the busiest month; months with no filed service show as zero.
August 2025
73 departures · 10,083 passengers
86.9%
Load
September 2025
68 departures · 9,230 passengers
86.1%
Load
October 2025
114 departures · 15,186 passengers
76.9%
Load
November 2025
96 departures · 13,445 passengers
81.6%
Load
December 2025
92 departures · 12,466 passengers
80.6%
Load
January 2026
69 departures · 9,965 passengers
83.0%
Load
February 2026
70 departures · 9,749 passengers
82.1%
Load
March 2026
74 departures · 11,014 passengers
88.2%
Load
April 2026
70 departures · 9,829 passengers
83.4%
Load
May 2026
73 departures · 10,723 passengers
87.3%
Load
June 2026
82 departures · 12,474 passengers
91.0%
Load
July 2026
79 departures · 12,000 passengers
90.0%
Load
By direction
Each direction is filed separately — they rarely match.
SAN → STL
89.1% full
41 departures · 6,092 passengers
STL → SAN
90.9% full
38 departures · 5,908 passengers
Nonstop SAN–STL traffic has been filed since 2025.
Source: US DOT BTS Form 41 T-100 Segment (All Carriers). Data through July 2026; filings from 2025. Public domain (US Government work).
The airports
Frequently asked
How far is San Diego (SAN) from St Louis (STL)?
SAN to STL is 1,554 miles (2,501 km / 1,351 nautical miles) measured great-circle — the shortest path over the surface of the Earth.
How long is the flight from SAN to STL?
A nonstop covers the 1,554-mile great-circle distance in roughly 3h 54m of block time, before winds. Actual schedules vary a few percent by direction and aircraft.
What plane flies SAN–STL?
In July 2026, the Boeing 737 MAX 8 flew the largest share of departures (46.8%), followed by the Boeing 737-800 (34.2%).
What mileage do I earn flying SAN–STL?
Distance-based programs credit off the 1,554-mile great-circle figure, then apply your fare-class earning rate. Revenue-based programs credit off the fare instead.
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