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prices we've seen · United States fares · USD

Flights from Seattle (SEA) to Seoul (GMP)

  • One way from $588
  • Round trip from $774
  • No nonstop seen
  • Fastest 22h 25m
  • 11 airlines

The cheapest one-way fare from Seattle (SEA) to Seoul (GMP) we have seen is $588 USD, departing Jan 5, 2027 (seen Nov 5, 2026): Hainan Airlines HU 496, 1 stop, 34h 50m.

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

Cheapest by month

Checked Nov 11

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

  1. Nov 2026$654
  2. Dec 2026$636
  3. Jan 2027$588
  4. Feb 2027$610
  5. Mar 2027—
  6. Apr 2027$642

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. TueJan 5

    10:20

    34h 50m1 stop

    14:10+2

    Cheapest$588 USD

    Hainan Airlines HU 496 · seen Nov 5

    Go to seller — $588

  2. SatJan 9

    10:20

    34h 50m1 stop

    14:10+2

    $600 USD

    Hainan Airlines HU 496 · seen Nov 5

    Go to seller — $600

  3. WedJan 6

    10:25

    31h3 stops

    10:25+2

    $630 USD

    Cathay Pacific CX 833 · seen Nov 8

    Go to seller — $630

  4. MonDec 7

    10:25

    33h 40m2 stops

    13:05+2

    $636 USD

    Cathay Pacific CX 833 · seen Nov 6

    Go to seller — $636

  5. SunJan 10

    08:40

    35h 55m3 stops

    13:35+2

    $650 USD

    Singapore Airlines SQ 027 · seen Nov 5

    Go to seller — $650

  6. WedNov 11

    00:10

    38h 50m2 stops

    08:00+2

    $654 USD

    China Airlines CI 021 · seen Nov 10

    Go to seller — $654

  7. ThuJan 7

    10:05

    34h3 stops

    13:05+2

    $661 USD

    Hainan Airlines HU 446 · seen Nov 5

    Go to seller — $661

  8. TueDec 8

    10:20

    52h 40m3 stops

    08:00+3

    $686 USD

    Hainan Airlines HU 496 · seen Nov 6

    Go to seller — $686

  9. WedDec 9

    10:25

    43h4 stops

    22:25+2

    $705 USD

    United UA 4715 · seen Nov 6

    Go to seller — $705

  10. SunDec 6

    07:00

    22h 25m2 stops

    22:25+1

    $738 USD

    Alaska Airlines AS 121 · seen Nov 4

    Go to seller — $738
Show 5 more fares

  1. FriJan 8

    15:45

    27h 55m2 stops

    12:40+2

    $753 USD

    ANA NH 117 · seen Nov 5

    Go to seller — $753

  2. FriDec 11

    07:00

    22h 25m2 stops

    22:25+1

    $796 USD

    Alaska Airlines AS 121 · seen Nov 4

    Go to seller — $796

  3. TueDec 22

    18:52

    32h 38m3 stops

    20:30+2

    $1,018 USD

    Alaska Airlines AS 220 · seen Nov 5

    Go to seller — $1,018

  4. MonDec 21

    18:30

    47h3 stops

    10:30+3

    $1,297 USD

    Alaska Airlines AS 941 · seen Nov 4

    Go to seller — $1,297

  5. WedDec 16

    06:00

    23h 5m2 stops

    22:05+1

    $1,383 USD

    Alaska Airlines AS 505 · seen Nov 6

    Go to seller — $1,383

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. 16 nightsFeb 15 – Mar 3

    12:15

    GMP

    Cheapest$774 USD

    American Airlines AA 8445 · 2 stops · 44h 30m in all, both ways · seen Nov 10

    Go to seller — $774

  2. 21 nightsFeb 15 – Mar 8

    12:15

    GMP

    $775 USD

    Japan Airlines JL 067 · 2 stops · 44h 30m in all, both ways · seen Nov 6

    Go to seller — $775

  3. 7 nightsNov 26 – Dec 3

    00:10

    GMP

    $1,321 USD

    EVA Air BR 025 · 4 stops · 44h 35m in all, both ways · seen Nov 6

    Go to seller — $1,321

  4. 21 nightsJan 5–26

    09:59

    GMP

    $1,380 USD

    QX2262 · 3 stops · 34h 6m in all, both ways · seen Nov 10

    Go to seller — $1,380

  5. 11 nightsJan 5–16

    12:15

    GMP

    $1,683 USD

    Japan Airlines JL 67 · 2 stops · 31h 50m in all, both ways · seen Nov 10

    Go to seller — $1,683

Compare other routes

Compared with Seattle → Seoul: $588 one way (Jan 5).

The way back

Other places from Seattle

Every route from Seattle →

To Seoul from other cities

Every route to Seoul →

Airlines seen on this route

  • American Airlines
  • Alaska Airlines
  • EVA Air
  • China Airlines
  • Cathay Pacific
  • Hainan Airlines
  • Japan Airlines
  • ANA
  • QX
  • Singapore Airlines
  • United

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

Seattle to Seoul in numbers

  • By month, Jan 2027 is the cheapest we've seen at $588 USD and Nov 2026 the most expensive at $654 USD — a spread of 11%.
  • None of the 15 departure dates seen has a nonstop fare — every fare has at least one stop; carriers seen: American Airlines, Alaska Airlines, EVA Air, China Airlines, Cathay Pacific, Hainan Airlines, Japan Airlines, ANA, QX, Singapore Airlines, United.
  • SEA serves Seattle, United States; GMP serves Seoul, South Korea.
  • Seoul runs 17 hours ahead of Seattle.

Questions

What is the cheapest fare from Seattle (SEA) to Seoul (GMP)?

The cheapest one-way fare from Seattle (SEA) to Seoul (GMP) we have seen is $588 USD, departing Jan 5, 2027 (seen Nov 5, 2026): Hainan Airlines HU 496, 1 stop, 34h 50m.

Is there a nonstop flight from Seattle (SEA) to Seoul (GMP)?

None of the 15 departure dates seen has a nonstop fare — every fare has at least one stop; carriers seen: American Airlines, Alaska Airlines, EVA Air, China Airlines, Cathay Pacific, Hainan Airlines, Japan Airlines, ANA, QX, Singapore Airlines, United.

Which month is cheapest to fly from Seattle (SEA) to Seoul (GMP)?

By month, Jan 2027 is the cheapest we've seen at $588 USD and Nov 2026 the most expensive at $654 USD — a spread of 11%.

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.