AirHint found the following cheapest return flights from Seattle (SEA) to Keflavik (KEF)
in June 2025 (see full year ).
Return flights
21 Jun
- 28 Jun
Icelandair
$ 520
direct
06 Jun
- 13 Jun
Icelandair
$ 521
direct
02 Jun
- 07 Jun
Icelandair
$ 521
direct
07 Jun
- 14 Jun
Icelandair
$ 521
direct
03 Jun
- 08 Jun
Icelandair
$ 521
direct
11 Jun
- 16 Jun
Icelandair
$ 522
direct
05 Jun
- 11 Jun
Icelandair
$ 543
direct
05 Jun
- 12 Jun
Icelandair
$ 544
direct
11 Jun
- 18 Jun
Icelandair
$ 544
direct
03 Jun
- 10 Jun
Icelandair
$ 544
direct
29 Jun
- 07 Jul
Delta
$ 569
26 Jun
- 01 Jul
Delta
$ 569
20 Jun
- 01 Jul
Delta
$ 574
29 Jun
- 07 Jul
Icelandair
$ 596
direct
30 Jun
- 07 Jul
Icelandair
$ 619
direct
28 Jun
- 05 Jul
SWISS
$ 659
27 Jun
- 02 Jul
Alaska Airlines
$ 684
29 Jun
- 04 Jul
Icelandair
$ 700
direct
25 Jun
- 02 Jul
Icelandair
$ 723
direct
27 Jun
- 04 Jul
Icelandair
$ 723
direct
Also check the deals for one-way flights from Seattle to Keflavik in June .
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.