AirHint found the following cheapest return flights from Seoul (ICN) to Keflavik (KEF) in July 2025 (see full year).

Return flights

15 Jul - 22 Jul	Lufthansa
17 Jul - 22 Jul	Lufthansa
09 Jul - 16 Jul	SWISS
10 Jul - 20 Jul	Lufthansa
19 Jul - 22 Jul	Lufthansa
22 Jul - 13 Aug	LOT
17 Jul - 24 Jul	Lufthansa
11 Jul - 15 Jul	Air China
10 Jul - 21 Jul	Lufthansa
12 Jul - 21 Jul	Lufthansa
09 Jul - 23 Jul	KLM
23 Jul - 04 Aug	KLM
27 Jul - 07 Aug	Lufthansa
31 Jul - 14 Aug	KLM
31 Jul - 02 Aug	Etihad Airways
31 Jul - 03 Aug	KLM
30 Jul - 05 Aug	Lufthansa
30 Jul - 08 Aug	Lufthansa
30 Jul - 04 Aug	Lufthansa
31 Jul - 09 Aug	Qatar Airways

Also check the deals for one-way flights from Seoul to Keflavik in July.

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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Cheapest return flights from Seoul to Keflavik in July from 757€

Return flights