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prices we've seen · United States fares · USD

Flights from Seoul (ICN) to Washington (DCA)

  • One way from $621
  • Round trip from $1,251
  • No nonstop seen
  • Fastest 29h 39m
  • 4 airlines

The cheapest one-way fare from Seoul to Washington we have seen is $621 USD, departing Nov 22 (seen Oct 24): T'way Air TW 531, 3 stops, 35h 15m.

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Cheapest · One wayseen Oct 24

$621 USD

T'way Air TW 531 · Nov 22 · 3 stops · 35h 15m

Continue on the seller's site — $621

Cheapest round tripseen Oct 24

$1,251 USD

United UA 806 · Feb 15 → Feb 21 · 2 stops · 44h 47m in all, both ways

Continue on the seller's site — $1,251

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These are the fares the seller shows on its United States site, in USD; prices where you live may differ.

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Prices are the fare alone; the seller shows the bag and fare rules.

Cheapest by month

Checked Oct 27

Pick a month to search the day its cheapest fare leaves.

  1. Nov 2026$621
  2. Dec 2026$683

Cheapest days to fly one wayCheapest round trips

Each day's cheapest fare we've seen, nonstop and with stops. Cheapest first.

We may earn a commission from the seller · How we rank

  1. SunNov 22

    20:40

    35h 15m3 stops

    17:55+1

    Cheapest$621 USD

    T'way Air TW 531 · seen Oct 24

    Go to seller — $621

  2. ThuNov 19

    20:40

    29h 39m3 stops

    12:19+1

    $625 USD

    T'way Air TW 531 · seen Oct 22

    Go to seller — $625

  3. MonDec 21

    13:10

    46h 49m3 stops

    21:59+1

    $683 USD

    Air China CA 124 · seen Oct 23

    Go to seller — $683

The cheapest round trips we've seen on this route, on any dates, cheapest first.

We may earn a commission from the seller · How we rank

  1. 6 nightsFeb 15–21

    12:45

    DCA

    Cheapest$1,251 USD

    United UA 806 · 2 stops · 44h 47m in all, both ways · seen Oct 24

    Go to seller — $1,251

  2. 49 nightsNov 12 – Dec 31

    12:40

    DCA

    $1,328 USD

    Peach MM 642 · 5 stops · 59h 13m in all, both ways · seen Oct 25

    Go to seller — $1,328

Compare other routes

Compared with Seoul → Washington: $621 one way (Nov 22).

Other places from Seoul

Every route from Seoul →

To Washington from other cities

Every route to Washington →

Airlines seen on this route

  • Air China
  • Peach
  • T'way Air
  • United

Marketing carriers; the operating airline is shown by the seller.

Seoul to Washington in numbers

  • By month, Nov 2026 is the cheapest we've seen at $621 USD and Dec 2026 the most expensive at $683 USD — a spread of 10%.
  • None of the 3 departure dates seen has a nonstop fare — every fare has at least one stop; carriers seen: Air China, Peach, T'way Air, United.
  • ICN serves Seoul, South Korea; DCA serves Washington, United States.
  • Washington runs 14 hours behind Seoul.

Questions

What is the cheapest fare from Seoul to Washington?

The cheapest one-way fare from Seoul to Washington we have seen is $621 USD, departing Nov 22 (seen Oct 24): T'way Air TW 531, 3 stops, 35h 15m.

Is there a nonstop flight from Seoul to Washington?

None of the 3 departure dates seen has a nonstop fare — every fare has at least one stop; carriers seen: Air China, Peach, T'way Air, United.

Which month is cheapest to fly from Seoul to Washington?

By month, Nov 2026 is the cheapest we've seen at $621 USD and Dec 2026 the most expensive at $683 USD — a spread of 10%.

How old is this price?

It is the cheapest fare we've seen for that date; the date beside it is the day it was seen, or our last check. We look again at least once a day for the routes people search, and stop showing a route's prices two days after our last look. The seller's page shows the price right now.

How does a2bflight rank results?

By price and duration only; commission never enters the order. Cheapest means cheapest among the fares we've seen for this route. A click that books may earn a2bflight a commission from the seller; the price you see is the seller's own. See how we rank and what we keep.