AirHint found the following cheapest return flights from Prestwick (PIK) to Seoul (ICN) in August 2025 (see full year).

Return flights

16 Aug - 17 Sep	Ryanair
13 Aug - 17 Sep	Ryanair
04 Aug - 11 Aug	Ryanair
23 Aug - 20 Sep	Ryanair
14 Aug - 21 Aug	Ryanair
09 Aug - 21 Aug	Ryanair
06 Aug - 25 Aug	Ryanair
17 Aug - 17 Sep	Ryanair
15 Aug - 17 Sep	Ryanair
02 Aug - 07 Aug	Ryanair
06 Aug - 24 Aug	Ryanair
06 Aug - 23 Aug	Ryanair
02 Aug - 10 Aug	Ryanair

Also check the deals for one-way flights from Prestwick to Seoul 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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Cheapest return flights from Prestwick to Seoul in August from 795€

Return flights