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

Return flights

26 Oct - 01 Nov	Spirit Airlines
24 Oct - 02 Nov	Spirit Airlines
24 Oct - 07 Nov	Spirit Airlines
24 Oct - 31 Oct	Spirit Airlines
13 Oct - 20 Oct	Spirit Airlines
31 Oct - 15 Nov	Spirit Airlines
18 Oct - 25 Oct	Frontier Airlines
02 Oct - 08 Oct	Spirit Airlines
30 Oct - 15 Nov	Frontier Airlines
05 Oct - 26 Oct	Frontier Airlines
06 Oct - 13 Oct	Frontier Airlines
10 Oct - 14 Oct	Spirit Airlines
31 Oct - 06 Nov	Delta
05 Oct - 19 Oct	United
30 Oct - 08 Nov	Air Canada

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

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 October from 707€

Return flights