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

Return flights

16 May - 26 May	MIAT Mongolian Airlines
11 May - 20 May	MIAT Mongolian Airlines
23 May - 31 May	MIAT Mongolian Airlines
09 May - 17 May	MIAT Mongolian Airlines
21 May - 04 Jun	China Eastern
02 May - 20 May	Ryanair
12 May - 19 May	LOT
05 May - 19 May	LOT
06 May - 19 May	LOT
11 May - 26 May	LOT
03 May - 19 May	LOT
18 May - 15 Jun	LOT
21 May - 01 Jun	LOT
24 May - 08 Jun	LOT
25 May - 11 Jun	LOT
08 May - 03 Jun	SKY express
18 May - 05 Jun	Finnair
28 May - 11 Jun	Finnair
23 May - 03 Jun	LOT
23 May - 19 Jun	Finnair

Also check the deals for one-way flights from Frankfurt to Seoul 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 Frankfurt to Seoul in May from 557€

Return flights