Cheapest return flights from Seoul to Washington in September from $858

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

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

Return flights

09 Sep - 16 Sep Air Canada
09 Sep - 21 Oct Air Canada
22 Sep - 28 Sep Air Canada
21 Sep - 26 Sep Air Canada
01 Sep - 04 Sep United
05 Sep - 11 Sep United
17 Sep - 15 Oct United
20 Sep - 29 Sep United
09 Sep - 16 Sep Korean Air direct
27 Sep - 07 Oct Delta
06 Sep - 13 Sep United
06 Sep - 14 Sep United
27 Sep - 09 Oct American Airlines
30 Sep - 08 Oct United
01 Sep - 04 Sep Korean Air direct
30 Sep - 12 Oct United
30 Sep - 12 Oct Korean Air direct

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

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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