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

Return flights

09 Jul - 22 Jul	Zipair
22 Jul - 25 Jul	Spirit Airlines
09 Jul - 16 Jul	Zipair
14 Jul - 23 Jul	Zipair
17 Jul - 20 Jul	Frontier Airlines
29 Jul - 06 Aug	Spirit Airlines
28 Jul - 06 Aug	Zipair
11 Jul - 19 Jul	Zipair
21 Jul - 30 Jul	Zipair
24 Jul - 30 Jul	Spirit Airlines
19 Jul - 09 Aug	Zipair
25 Jul - 10 Aug	Zipair
14 Jul - 31 Jul	Delta
09 Jul - 12 Aug	Delta
14 Jul - 13 Aug	Delta
24 Jul - 13 Aug	Delta
24 Jul - 12 Aug	Delta
24 Jul - 14 Aug	Delta
24 Jul - 07 Aug	Delta
22 Jul - 23 Jul	Hawaiian Airlines

Also check the deals for one-way flights from Houston to Seoul in July.

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 July from 889€

Return flights