Reykjavík (KEF) to San Francisco (SFO)
Flight time
≈ 9h 11m
Bearing
296° NW
Reykjavík (KEF) to San Francisco (SFO) is 4,193 miles (6,748 km) as the crow flies — the great-circle baseline most distance-based mileage programs credit.
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What actually flies KEF–SFO
Filed traffic dataIn March 2026, Lufthansa was the only carrier flying nonstop KEF–SFO; the Airbus A340-300 was the most common aircraft at 100% of departures; flights ran 89% full.
Departures
1
March 2026
Seats
371
both directions
Passengers
330
both directions
Load factor
88.9%
RPM ÷ ASM
Who flies KEF–SFO?
Lufthansa was the only carrier to fly nonstop KEF–SFO in March 2026 (1 departures).
- LH
Lufthansa
1 departures · 371 seats
Share of departures100.0%88.9%
Load
What plane flies KEF–SFO?
In March 2026, the Airbus A340-300 flew 100% of KEF–SFO departures.
- Airbus A340-300
1 departures · 88.9% load
100.0%
How has KEF–SFO traffic changed?
Nonstop KEF–SFO departures fell from 2 in June 2025 to 1 in March 2026.
Monthly nonstop KEF–SFO traffic, trailing 12 months through March 2026. Bars scale to the busiest month; months with no filed service show as zero.
June 2025
2 departures · 272 passengers
93.8%
Load
July 2025
0 departures · 0 passengers
—
Load
August 2025
0 departures · 0 passengers
—
Load
September 2025
2 departures · 2 passengers
7.1%
Load
October 2025
0 departures · 0 passengers
—
Load
November 2025
0 departures · 0 passengers
—
Load
December 2025
0 departures · 0 passengers
—
Load
January 2026
1 departures · 313 passengers
97.8%
Load
February 2026
0 departures · 0 passengers
—
Load
March 2026
1 departures · 330 passengers
88.9%
Load
Nonstop KEF–SFO traffic has been filed since 2025.
Source: US DOT BTS Form 41 T-100 Segment (All Carriers). Data through March 2026; filings from 2025. Public domain (US Government work).
The airports
Reykjavík
IS
Keflavik International Airport
Coordinates
63.98°N, 22.61°W
Hemisphere
N · W
Frequently asked
How far is Reykjavík (KEF) from San Francisco (SFO)?
KEF to SFO is 4,193 miles (6,748 km / 3,644 nautical miles) measured great-circle — the shortest path over the surface of the Earth.
How long is the flight from KEF to SFO?
A nonstop covers the 4,193-mile great-circle distance in roughly 9h 11m of block time, before winds. Actual schedules vary a few percent by direction and aircraft.
What plane flies KEF–SFO?
In March 2026, the Airbus A340-300 flew the largest share of departures (100.0%).
What mileage do I earn flying KEF–SFO?
Distance-based programs credit off the 4,193-mile great-circle figure, then apply your fare-class earning rate. Revenue-based programs credit off the fare instead.
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