Cheapest return flights from Washington to Seoul in October from $1022

Best time to book flights for Washington (IAD) to Seoul (ICN) flights at AirHint

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

Return flights

01 Oct - 22 Oct Turkish Airlines
22 Oct - 29 Oct Turkish Airlines
14 Oct - 01 Nov Turkish Airlines
31 Oct - 08 Nov Turkish Airlines
10 Oct - 31 Oct Air India
11 Oct - 31 Oct Air India
01 Oct - 22 Oct Korean Air direct
22 Oct - 29 Oct Delta direct
09 Oct - 26 Oct Air Canada
31 Oct - 08 Nov Delta direct
14 Oct - 01 Nov Korean Air direct
09 Oct - 26 Oct Korean Air direct
10 Oct - 31 Oct Korean Air direct
11 Oct - 31 Oct Korean Air direct

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

Skyscanner

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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