Cheapest one-way flights from Washington to Seoul in October from $598

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

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

One-Way flights

25 Oct Turkish Airlines
02 Oct Frontier Airlines
07 Oct Air Canada
12 Oct Alaska Airlines
11 Oct Alaska Airlines
09 Oct Alaska Airlines
08 Oct Air India
25 Oct Delta direct
02 Oct Korean Air direct
10 Oct United

Also check the deals for return 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.

Book a cheap hotel in Seoul

Cheap car rent in Seoul