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

Return flights

22 Aug - 29 Aug	Zipair
19 Aug - 26 Aug	Spirit Airlines
23 Aug - 25 Aug	Zipair
14 Aug - 26 Aug	Spirit Airlines
17 Aug - 24 Aug	WestJet
08 Aug - 17 Sep	Spirit Airlines
10 Aug - 20 Aug	WestJet
04 Aug - 18 Aug	Zipair
08 Aug - 22 Aug	United
01 Aug - 13 Aug	Zipair
07 Aug - 16 Aug	WestJet
05 Aug - 02 Sep	Korean Air

Also check the deals for one-way flights from Houston 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 Houston to Seoul in August from 800€

Return flights