How old is this price?

It is the cheapest fare we saw for that date. We look again at least once a day for the routes people search, and stop showing a price two days after we last saw it, so a price here can be up to four days old — the date beside it says when that was. 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 what the store holds for this corridor. A click that books may earn a2bflight a commission from the seller; the price you see is the seller's own.

cached prices · United States fares · USD

Flights from Seattle (SEA) to Seoul (ICN)

The cheapest one-way fare from Seattle to Seoul we have seen is $468 USD, departing Oct 20 (found Sep 25): Alaska Airlines AS 403, 1 stop, 26h12m.

Cheapest seen · One wayfound Sep 25

$468 USD

Alaska Airlines AS 403 · Oct 20 · 1 stop · 26h12m

Continue on the seller's site — $468

a2bflight may earn a commission from the seller if you book after this click; the price you see is the seller's and does not change. How we rank, what we keep.

Cheapest round trip seen

$928 USD

Cathay Pacific CX 853 · Sep 30 → Oct 7 · 2 stops · 69h15m in all, both ways

Continue on the seller's site — $928

See more dates →

Prices are the cached fare only; baggage and fare rules are shown by the seller.

about this route

Seattle to Seoul in numbers

By month, Feb 2027 is the cheapest we hold at $430 USD and Dec 2026 the most expensive at $719 USD — a spread of 67%.

Nonstop fares are held for 2 of the 2 departure dates seen; carriers seen: Alaska Airlines, EVA Air, Cathay Pacific, Frontier, Hainan Airlines, Korean Air.

SEA serves Seattle, United States; ICN serves Seoul, South Korea.

Seoul runs 16 hours ahead of Seattle.

by month

Cheapest by month

Oct 2026
$468 USD
checked Sep 26
Dec 2026
$719 USD
checked Sep 26
Feb 2027
$430 USD
checked Sep 26

by date

Cheapest one-way by date

4 rows held, cheapest first — the cheapest nonstop and the cheapest with stops seen for each departure date.

Oct 20 · 20:48 SEA
AS4031 stop · 26h12m
found Sep 25 · baggage and fare rules are shown by the seller — this price is the cached fare only
$468 USD
Continue on the seller's site — $468
a2bflight may earn a commission from the seller if you book after this click; the price you see is the seller's and does not change. How we rank, what we keep.
Oct 1 · 11:55 SEA
HU4461 stop · 40h30m
found Sep 25 · baggage and fare rules are shown by the seller — this price is the cached fare only
$495 USD
Continue on the seller's site — $495
a2bflight may earn a commission from the seller if you book after this click; the price you see is the seller's and does not change. How we rank, what we keep.
Oct 20 · 12:50 SEA
KE42Nonstop · 11h50m
found Sep 25 · baggage and fare rules are shown by the seller — this price is the cached fare only
$522 USD
Continue on the seller's site — $522
a2bflight may earn a commission from the seller if you book after this click; the price you see is the seller's and does not change. How we rank, what we keep.
Oct 1 · 13:35 SEA
AS119Nonstop · 11h55m
found Sep 25 · baggage and fare rules are shown by the seller — this price is the cached fare only
$670 USD
Continue on the seller's site — $670
a2bflight may earn a commission from the seller if you book after this click; the price you see is the seller's and does not change. How we rank, what we keep.

round trips

Cheapest round trips

The cheapest out-and-back pairs the cache holds, any dates.

Sep 30 → Oct 7 · 11:45 SEA
CX8532 stops · 69h15m in all, both ways
found Sep 22 · baggage and fare rules are shown by the seller — this price is the cached fare only
$928 USD
Continue on the seller's site — $928
a2bflight may earn a commission from the seller if you book after this click; the price you see is the seller's and does not change. How we rank, what we keep.
May 1 → May 4 · 01:30 SEA
BR252 stops · 32h35m in all, both ways
found Sep 23 · baggage and fare rules are shown by the seller — this price is the cached fare only
$1,139 USD
Continue on the seller's site — $1,139
a2bflight may earn a commission from the seller if you book after this click; the price you see is the seller's and does not change. How we rank, what we keep.
Sep 30 → Oct 7 · 12:50 SEA
KE42Nonstop · 21h50m in all, both ways
found Sep 22 · baggage and fare rules are shown by the seller — this price is the cached fare only
$1,405 USD
Continue on the seller's site — $1,405
a2bflight may earn a commission from the seller if you book after this click; the price you see is the seller's and does not change. How we rank, what we keep.
May 1 → May 4 · 12:50 SEA
KE42Nonstop · 21h45m in all, both ways
found Sep 23 · baggage and fare rules are shown by the seller — this price is the cached fare only
$2,036 USD
Continue on the seller's site — $2,036
a2bflight may earn a commission from the seller if you book after this click; the price you see is the seller's and does not change. How we rank, what we keep.
Dec 28 → Jan 7 · 21:01 SEA
F942044 stops · 93h13m in all, both ways
found Sep 22 · baggage and fare rules are shown by the seller — this price is the cached fare only
$2,969 USD
Continue on the seller's site — $2,969
a2bflight may earn a commission from the seller if you book after this click; the price you see is the seller's and does not change. How we rank, what we keep.

carriers

Carriers seen on this corridor

Alaska Airlines
EVA Air
Cathay Pacific
Frontier
Hainan Airlines
Korean Air

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

questions

Questions

What is the cheapest fare from Seattle to Seoul?: The cheapest one-way fare from Seattle to Seoul we have seen is $468 USD, departing Oct 20 (found Sep 25): Alaska Airlines AS 403, 1 stop, 26h12m.
Is there a nonstop flight from Seattle to Seoul?: Nonstop fares are held for 2 of the 2 departure dates seen; carriers seen: Alaska Airlines, EVA Air, Cathay Pacific, Frontier, Hainan Airlines, Korean Air.
Which month is cheapest to fly from Seattle to Seoul?: By month, Feb 2027 is the cheapest we hold at $430 USD and Dec 2026 the most expensive at $719 USD — a spread of 67%.
How old is this price?: It is the cheapest fare we saw for that date. We look again at least once a day for the routes people search, and stop showing a price two days after we last saw it, so a price here can be up to four days old — the date beside it says when that was. 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 what the store holds for this corridor. 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.

more routes

Return: Flights from Seoul (ICN) to Seattle (SEA) →Every route from Seattle →Every route to Seoul →

More from Seattle

Other destinations with a cached fare from this origin, cheapest first.

More to Seoul

Other origins with a cached fare to this destination, cheapest first.