Cheapest return flights from San Francisco to Keflavik in September from 414€
AirHint found the following cheapest return flights from San Francisco (SFO) to Keflavik (KEF)
in September 2025 (see full year ).
Return flights
30 Sep
- 07 Oct
Flair Airlines
414 €
23 Sep
- 01 Oct
Hawaiian Airlines
445 €
30 Sep
- 08 Oct
Hawaiian Airlines
449 €
04 Sep
- 11 Sep
Hawaiian Airlines
456 €
07 Sep
- 15 Sep
Frontier Airlines
456 €
15 Sep
- 23 Sep
Hawaiian Airlines
456 €
16 Sep
- 24 Sep
Hawaiian Airlines
456 €
02 Sep
- 10 Sep
Alaska Airlines
458 €
06 Sep
- 13 Sep
Hawaiian Airlines
460 €
09 Sep
- 17 Sep
Hawaiian Airlines
460 €
10 Sep
- 17 Sep
Alaska Airlines
461 €
27 Sep
- 04 Oct
Flair Airlines
462 €
24 Sep
- 02 Oct
WestJet
469 €
28 Sep
- 06 Oct
Sun Country Airlines
471 €
06 Sep
- 14 Sep
Sun Country Airlines
476 €
26 Sep
- 04 Oct
WestJet
488 €
03 Sep
- 11 Sep
Frontier Airlines
490 €
29 Sep
- 07 Oct
Flair Airlines
525 €
27 Sep
- 05 Oct
jetBlue
569 €
25 Sep
- 03 Oct
Frontier Airlines
595 €
Also check the deals for one-way flights from San Francisco to Keflavik in September .
The deals are updated regularly. The prices may go up as tickets are purchased by other travellers.
Only the cheapest flights are offered.
Select a price to book and secure these cheap prices.
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