AirHint found the following cheapest return flights from Seoul (ICN) to Frankfurt (FRA) in May 2026 (see full year).

Return flights

11 May - 18 May	T'way Air	direct
27 May - 03 Jun	T'way Air	direct
28 May - 28 May	Air China
12 May - 20 May	Air China
11 May - 21 May	Air China
14 May - 21 May	Air China
21 May - 30 May	Air China
18 May - 22 May	Air China
20 May - 20 May	Air China
11 May - 20 May	Air China
12 May - 12 May	Air China
25 May - 08 Jun	Air China
28 May - 03 Jun	Air China
31 May - 07 Jun	Air China
23 May - 06 Jun	Air China
26 May - 05 Jun	Air China
27 May - 10 Jun	Air China
22 May - 06 Jun	Air China
25 May - 04 Jun	Air China
29 May - 05 Jun	Air China

Also check the deals for one-way flights from Seoul to Frankfurt in May.

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 Frankfurt in May from $526

Return flights