Flight Time from San Francisco (SFO) to Reykjavik (KEF)

The 6,755 km between SFO and KEF converts to 8.61 hours of flying under the 850 km/h + 40 min model. Each stopover adds ground dwell at the hub, so the totals model out to about 12.1 hours for one stop and 17.1 for two.

Between UTC−8 and UTC+0 you gain a 8-hour head start on the day — worth remembering when you schedule the first dinner or call.

Flexible-flier trick: price SFO against KEF and then against each nearby field below — secondary endpoints within 700 km sometimes clear the fare by a full cabin class. That leaves SFO → KEF as the only sensible air routing, which concentrates fare power in a single search.

None of these nearby fields has a paired calculator page from SFO yet, so use the distance and time columns to estimate any rerouting yourself. Remember the destination is the point: any airport below that adds more than a couple of hours of surface time to reach Reykjavik needs a substantial fare gap to justify.

A 10:00 departure works out to roughly 02:37 on the clock in Reykjavik — the 8.61 h airborne leg plus the UTC−8 → UTC+0 shift. Budget the ground side too: a standard day runs $312 in Reykjavik versus $311 in San Francisco (hotel, three meals, two transit rides), so the arrival city sets the trip's marginal cost.

San Francisco undercuts Reykjavik by $1 a day on the dataset averages; let that shape how many nights you book at each end. With 8 hours gained eastbound, the 6,755 km out to Reykjavik ends in a serious jet-lag bill — plan a quiet first day.