Seoul to Seattle GMP, ICN → SEA
Gimpo International Airport (GMP), Incheon International Airport (ICN) → Seattle-Tacoma International Airport (SEA)
The cheapest return found recently is $1,099 with China Airlines, 24 May 2027 – 21 Jun 2027, found yesterday. The cheapest one-way found recently is $312 with Alaska Airlines, 23 Oct, found 3 days ago.
Return
The cheapest return fare on each of 4 departure dates is usually $1,057 to $1,578.
Cheapest return found recently
$1,099
24 May 2027 – 21 Jun 2027 · China Airlines
Incheon International Airport (ICN) → Seattle-Tacoma International Airport (SEA)
Leaves 8:05 p.m. · Return leaves 1:15 a.m. · 33 h 25 min of travel, both ways together
out 1 stop, back 1 stop
found yesterday
Cheapest nonstop return
$1,706
24 Oct – 17 Dec · Alaska Airlines
Incheon International Airport (ICN) → Seattle-Tacoma International Airport (SEA)
Leaves 7:35 p.m. · Return leaves 12:40 p.m. · 22 h of travel, both ways together
out nonstop, back nonstop
found yesterday
Found recently, and the cheapest we hold
$1,099 24 May 2027 – 21 Jun 2027found yesterdaySee prices for these dates
$931 15 Feb 2027 – 15 Apr 2027found 6 days agoSee prices for these dates
What have prices looked like?
Over 22 days, 27 Sept to 18 Oct, the cheapest return we saw each day was $931 to $2,078.
22 days is a short history, so treat this range as an early guide.
Those were the prices on those days, not today's.
Is this a good return price?
Compared with the cheapest return fare on each of 4 departure dates from 24 Oct to 24 May 2027, found by travelers' searches in the last 7 days (economy, the price the seller showed on Aviasales). The usual range is the middle half of those prices.
Could nearby dates be cheaper?
We hold no other 28-night return fares leaving within 3 days of 24 May 2027 to compare.
Every date we hold
8 fares on 4 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 24 Oct – 17 Dec | $1,706 | Alaska Airlines | Incheon International Airport (ICN) → Seattle-Tacoma International Airport (SEA) | out nonstop, back nonstop | found yesterday | See prices for these dates |
| 12 Nov – 17 Dec | $1,535 | Philippine Airlines | Incheon International Airport (ICN) → Seattle-Tacoma International Airport (SEA) | out 1 stop, back 1 stop | found yesterday | See prices for these dates |
| 15 Feb 2027 – 15 Apr 2027 | $931 | Air Canada | Incheon International Airport (ICN) → Seattle-Tacoma International Airport (SEA) | out 1 stop, back 1 stop | found 6 days ago | See prices for these dates |
| 24 May 2027 – 21 Jun 2027 | $1,099 | China Airlines | Incheon International Airport (ICN) → Seattle-Tacoma International Airport (SEA) | out 1 stop, back 1 stop | found yesterday | See prices for these dates |
Which month looks cheapest?
February 2027 is the cheapest month — from $931.
Airlines on the cheapest dates: Alaska Airlines, Philippine Airlines, Air Canada, China Airlines.
One-way
Not enough comparable prices yet for a usual one-way price.
Cheapest one-way found recently
$312
23 Oct · Alaska Airlines
Incheon International Airport (ICN) → Seattle-Tacoma International Airport (SEA)
Leaves 7:35 p.m. · 10 h 5 min trip
stops unknown
found 3 days ago
Cheapest nonstop one-way
None seen yet.
Found recently, and the cheapest we hold
$312 23 Octfound 3 days agoOpen this trip
It is also the cheapest one-way we hold, of any age.
What have prices looked like?
On 16 Oct, the cheapest one-way we saw was $312.
At $312, the cheapest one-way found recently costs the same.
One day is a short history, so treat this as an early guide.
Those were the prices on those days, not today's.
Is this a good one-way price?
Not enough comparable prices yet: we hold one-way fares on 1 departure date and need at least 3 to say what is usual.
Could nearby dates be cheaper?
We hold no other one-way fares leaving within 3 days of 23 Oct to compare.
Every date we hold
1 fares on 1 departure dates
See every date as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 23 Oct | $312 | Alaska Airlines | Incheon International Airport (ICN) → Seattle-Tacoma International Airport (SEA) | stops unknown | found 3 days ago | Open this trip |
Airlines on the cheapest dates: Alaska Airlines.
Premium cabin fares from Seoul to Seattle
We hold no premium economy, business or first-class fares for this route: we collect them for the busiest routes, and this one is not among them yet.
Today's prices for 24 May 2027 – 21 Jun 2027 in another cabin: Premium economy · Business · First
Today's prices for 23 Oct in another cabin: Premium economy · Business · First
How far ahead were prices cheapest for Seoul to Seattle?
Return
Fares 90 to 179 days before departure were typically 24% lower than 60 to 89 days before departure.
From the cheapest return each day between 27 Sept and 18 Oct (22 days), grouped by how many days ahead the flight left; one adult in economy.
Each range covers different departure dates, so this compares typical fares, not the same trip priced twice.
Prices reflect recent searches — current fares may differ.
See these ranges as a table
| Booked ahead by | Typical fare | Cheapest day | Above the cheapest | Days of prices |
|---|---|---|---|---|
| 60–89 days | $1,325 | $1,325 | +32% | 7 |
| 90–179 days | $1,007 | $931 | Cheapest seen | 16 |
| 180+ days | $1,055 | $1,055 | +5% | 9 |
One-way
Not enough history yet: we have one day of one-way prices, 16 Oct, and compare booking times once 3 booking ranges have 7 days each.
Live price for these dates
The cheapest return found recently is for 24 May 2027 – 21 Jun 2027. A live search on this page shows what those dates cost now, for one adult in economy.
Prices are what travelers' searches on Aviasales found in the last 7 days, in US dollars: the price the seller showed on Aviasales; bags may cost extra. Fares change, so check today's price before you book. How our prices work