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SFO to KEF: distance & flight time
San Francisco (San Francisco International Airport) → Keflavik (Keflavik International Airport)
4,193 mi
6,748 km · 3,644 nm
8h 41m
estimated nonstop flight time
+7h
time difference · heading northeast
See live SFO→KEF fares Phone-only fares on this route — call free
Flight time details
4,193 miles nonstop takes roughly 8h 41m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 7-hour time gain when reading arrival times on your ticket.
The two airports
- SFO — San Francisco International Airport · San Francisco, United States
- KEF — Keflavik International Airport · Keflavik, Iceland
Distances are great-circle ("as the crow flies") — the same basis airlines use for frequent-flyer miles.
Alternate airports can cut this fare
Flying from or into a nearby airport is the #1 trick our agents use to beat online prices. Call and we'll compare every combination on one call.
Near SFO
- SQL · San Carlos Airport10 mi away
- HAF · Half Moon Bay Airport10 mi away
- OAK · Metropolitan Oakland International Airport11 mi away
- NGZ · Alameda Naval Air Station12 mi away
Near KEF
- RKV · Reykjavik Airport22 mi away
- GUU · Grundarfjörður Airport72 mi away
- VEY · Vestmannaeyjar Airport81 mi away
- PFJ · Patreksfjörður Airport116 mi away
Frequently asked questions
How far is SFO from KEF?
The flight distance from San Francisco (SFO) to Keflavik (KEF) is 4,193 miles (6,748 km, 3,644 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from SFO to KEF?
A nonstop flight takes about 8h 41m gate to gate. Actual time varies with winds, routing and season — eastbound transatlantic flights, for example, are usually faster than the return.
What is the time difference between San Francisco and Keflavik?
Keflavik is 7 hours ahead of San Francisco.
What is the cheapest way to fly from SFO to KEF?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on SFO–KEF that never appear on search engines, with no booking fees.