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

Return flights

17 Aug - 31 Aug	Delta
21 Aug - 10 Sep	Delta
09 Aug - 23 Aug	Delta
06 Aug - 29 Aug	Delta
01 Aug - 07 Sep	Delta
01 Aug - 30 Aug	Delta
11 Aug - 22 Aug	Delta
29 Aug - 20 Sep	Korean Air
16 Aug - 13 Sep	Korean Air
10 Aug - 16 Aug	Korean Air
20 Aug - 03 Sep	Korean Air
09 Aug - 06 Sep	Korean Air
08 Aug - 21 Aug	Delta
09 Aug - 31 Aug	Korean Air
02 Aug - 31 Aug	Korean Air

Also check the deals for one-way flights from Dallas 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 Dallas to Seoul in August from $1148

Return flights