Cheapest return flights from Seattle to Keflavik in August from 350€
AirHint found the following cheapest return flights from Seattle (SEA) to Keflavik (KEF)
in August 2025 (see full year ).
Return flights
15 Aug
- 18 Aug
Icelandair
350 €
direct
07 Aug
- 13 Aug
Icelandair
350 €
direct
12 Aug
- 19 Aug
Icelandair
350 €
direct
13 Aug
- 20 Aug
Icelandair
350 €
direct
14 Aug
- 21 Aug
Icelandair
350 €
direct
15 Aug
- 22 Aug
Icelandair
350 €
direct
16 Aug
- 23 Aug
Icelandair
350 €
direct
22 Aug
- 29 Aug
Icelandair
350 €
direct
18 Aug
- 25 Aug
Icelandair
350 €
direct
19 Aug
- 26 Aug
Icelandair
350 €
direct
27 Aug
- 03 Sep
Icelandair
350 €
direct
28 Aug
- 04 Sep
Icelandair
350 €
direct
29 Aug
- 05 Sep
Icelandair
350 €
direct
26 Aug
- 02 Sep
Icelandair
350 €
direct
25 Aug
- 01 Sep
United
507 €
30 Aug
- 06 Sep
Delta
519 €
30 Aug
- 06 Sep
Icelandair
520 €
direct
31 Aug
- 07 Sep
Icelandair
520 €
direct
25 Aug
- 01 Sep
Icelandair
520 €
direct
Also check the deals for one-way flights from Seattle to Keflavik in August .
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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