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prices we've seen · United States fares · USD

Flights from Seattle (SEA) to Seoul (ICN)

  • One way from $394
  • Round trip from $519
  • Nonstop on 16 of 16 dates
  • Fastest 11h 55m
  • 9 airlines

The cheapest one-way fare from Seattle (SEA) to Seoul (ICN) we have seen is $394 USD, departing Jan 7, 2027 (seen Nov 5, 2026): Hainan Airlines HU 446, 1 stop, 41h 10m.

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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$491
  2. Dec 2026$491
  3. Jan 2027$394
  4. Feb 2027$433
  5. Mar 2027—
  6. Apr 2027$513

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. ThuJan 7

    10:05

    41h 10m1 stop

    20:15+2

    Cheapest$394 USD

    Hainan Airlines HU 446 · seen Nov 5

    Go to seller — $394

  2. FriJan 8

    19:59

    32h 21m1 stop

    21:20+2

    $450 USD

    Alaska Airlines AS 706 · seen Nov 5

    Go to seller — $450

  3. SatJan 9

    07:10

    21h 10m1 stop

    21:20+1

    $452 USD

    Alaska Airlines AS 283 · seen Nov 5

    Go to seller — $452

  4. WedJan 6

    10:25

    21h 15m1 stop

    00:40+2

    $462 USD

    Cathay Pacific CX 833 · seen Nov 8

    Go to seller — $462

  5. TueJan 5

    19:39

    51h 46m2 stops

    16:25+3

    $478 USD

    Alaska Airlines AS 590 · seen Nov 5

    Go to seller — $478

  6. SunJan 10

    11:53

    40h 27m2 stops

    21:20+2

    $482 USD

    Frontier F9 2408 · seen Nov 5

    Go to seller — $482

  7. WedNov 11

    21:30

    28h 55m2 stops

    19:25+2

    $491 USD

    Philippine Airlines PR 125 · seen Nov 10

    Go to seller — $491

  8. SunDec 6

    18:40

    33h 40m1 stop

    21:20+2

    $491 USD

    Alaska Airlines AS 1386 · seen Nov 4

    Go to seller — $491

  9. MonDec 7

    10:25

    33h 20m1 stop

    12:45+2

    $586 USD

    Cathay Pacific CX 833 · seen Nov 6

    Go to seller — $586

  10. TueDec 8

    18:13

    29h 7m1 stop

    16:20+2

    $595 USD

    Alaska Airlines AS 1310 · seen Nov 6

    Go to seller — $595
Show 21 more fares

  1. FriDec 11

    08:00

    28h 25m1 stop

    05:25+2

    $665 USD

    Alaska Airlines AS 4 · seen Nov 4

    Go to seller — $665

  2. WedDec 9

    19:05

    30h 15m1 stop

    18:20+2

    $720 USD

    Turkish Airlines TK 204 · seen Nov 6

    Go to seller — $720

  3. WedNov 11

    11:00

    11h 55mNonstop

    15:55+1

    $792 USD

    Korean Air KE 042 · seen Nov 10

    Go to seller — $792

  4. TueDec 22

    19:05

    65h 25m1 stop

    05:30+4

    $856 USD

    Air Canada AC 8811 · seen Nov 5

    Go to seller — $856

  5. MonDec 21

    15:15

    32h 55m1 stop

    17:10+2

    $935 USD

    Air Canada AC 8807 · seen Nov 4

    Go to seller — $935

  6. TueDec 22

    00:10

    12h 10mNonstop

    05:20+1

    $975 USD

    Korean Air KE 048 · seen Nov 5

    Go to seller — $975

  7. WedDec 16

    00:10

    12h 10mNonstop

    05:20+1

    $995 USD

    Korean Air KE 48 · seen Nov 6

    Go to seller — $995

  8. TueJan 5

    00:10

    12h 10mNonstop

    05:20+1

    $1,012 USD

    Korean Air KE 048 · seen Nov 5

    Go to seller — $1,012

  9. SatJan 9

    11:00

    11h 55mNonstop

    15:55+1

    $1,025 USD

    Korean Air KE 042 · seen Nov 5

    Go to seller — $1,025

  10. ThuJan 7

    11:00

    11h 55mNonstop

    15:55+1

    $1,038 USD

    Korean Air KE 042 · seen Nov 5

    Go to seller — $1,038

  11. FriJan 8

    11:00

    11h 55mNonstop

    15:55+1

    $1,051 USD

    Korean Air KE 042 · seen Nov 5

    Go to seller — $1,051

  12. SunJan 10

    12:40

    11h 55mNonstop

    17:35+1

    $1,065 USD

    Alaska Airlines AS 119 · seen Nov 5

    Go to seller — $1,065

  13. WedDec 9

    11:00

    11h 55mNonstop

    15:55+1

    $1,080 USD

    Korean Air KE 42 · seen Nov 6

    Go to seller — $1,080

  14. MonDec 7

    00:10

    12h 10mNonstop

    05:20+1

    $1,080 USD

    Korean Air KE 48 · seen Nov 6

    Go to seller — $1,080

  15. TueDec 8

    00:10

    12h 10mNonstop

    05:20+1

    $1,080 USD

    Korean Air KE 48 · seen Nov 6

    Go to seller — $1,080

  16. SunDec 6

    11:00

    11h 55mNonstop

    15:55+1

    $1,090 USD

    Korean Air KE 42 · seen Nov 4

    Go to seller — $1,090

  17. FriDec 11

    11:00

    11h 55mNonstop

    15:55+1

    $1,101 USD

    Korean Air KE 42 · seen Nov 4

    Go to seller — $1,101

  18. MonDec 21

    11:00

    11h 55mNonstop

    15:55+1

    $1,106 USD

    Korean Air KE 42 · seen Nov 4

    Go to seller — $1,106

  19. WedJan 6

    00:10

    12h 10mNonstop

    05:20+1

    $1,117 USD

    Korean Air KE 48 · seen Nov 8

    Go to seller — $1,117

  20. SunDec 20

    15:24

    31h 51m1 stop

    16:15+2

    $1,190 USD

    United UA 2478 · seen Nov 4

    Go to seller — $1,190

  21. SunDec 20

    11:00

    11h 55mNonstop

    15:55+1

    $1,439 USD

    Korean Air KE 42 · seen Nov 4

    Go to seller — $1,439

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. 21 nightsFeb 15 – Mar 8

    21:40

    ICN

    Cheapest$519 USD

    Alaska Airlines AS 417 · 3 stops · 53h in all, both ways · seen Nov 6

    Go to seller — $519

  2. 16 nightsFeb 15 – Mar 3

    15:51

    ICN

    $541 USD

    Cathay Pacific CX 7905 · 3 stops · 47h 59m in all, both ways · seen Nov 10

    Go to seller — $541

  3. 16 nightsFeb 15 – Mar 3

    11:00

    15:55+1

    $629 USD

    Korean Air KE 042 · Nonstop · 21h 50m in all, both ways · seen Nov 10

    Go to seller — $629

  4. 21 nightsFeb 15 – Mar 8

    00:10

    05:20+1

    $658 USD

    Korean Air KE 048 · Nonstop · 22h 5m in all, both ways · seen Nov 6

    Go to seller — $658

  5. 21 nightsJan 5–26

    10:25

    ICN

    $896 USD

    Cathay Pacific CX 833 · 2 stops · 51h 25m in all, both ways · seen Nov 10

    Go to seller — $896

  6. 7 nightsNov 26 – Dec 3

    11:29

    ICN

    $917 USD

    Alaska Airlines AS 1602 · 2 stops · 47h 6m in all, both ways · seen Nov 6

    Go to seller — $917

  7. 7 nightsNov 26 – Dec 3

    11:00

    15:55+1

    $1,114 USD

    Korean Air KE 042 · Nonstop · 21h 50m in all, both ways · seen Nov 6

    Go to seller — $1,114

  8. 11 nightsJan 5–16

    09:59

    ICN

    $1,117 USD

    Alaska Airlines AS 2262 · 3 stops · 45h 31m in all, both ways · seen Nov 10

    Go to seller — $1,117

  9. 21 nightsJan 5–26

    11:00

    15:55+1

    $1,833 USD

    Korean Air KE 042 · Nonstop · 21h 50m in all, both ways · seen Nov 10

    Go to seller — $1,833

  10. 11 nightsJan 5–16

    11:00

    15:55+1

    $1,974 USD

    Korean Air KE 42 · Nonstop · 21h 45m in all, both ways · seen Nov 10

    Go to seller — $1,974

Compare other routes

Compared with Seattle → Seoul: $394 one way (Jan 7).

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

  • Air Canada
  • Alaska Airlines
  • Cathay Pacific
  • Frontier
  • Hainan Airlines
  • Korean Air
  • Philippine Airlines
  • Turkish 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 $394 USD and Apr 2027 the most expensive at $513 USD — a spread of 30%.
  • Nonstop fares were seen on 16 of the 16 departure dates; carriers seen: Air Canada, Alaska Airlines, Cathay Pacific, Frontier, Hainan Airlines, Korean Air, Philippine Airlines, Turkish Airlines, United.
  • SEA serves Seattle, United States; ICN serves Seoul, South Korea.
  • Seoul runs 17 hours ahead of Seattle.

Questions

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

The cheapest one-way fare from Seattle (SEA) to Seoul (ICN) we have seen is $394 USD, departing Jan 7, 2027 (seen Nov 5, 2026): Hainan Airlines HU 446, 1 stop, 41h 10m.

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

Nonstop fares were seen on 16 of the 16 departure dates; carriers seen: Air Canada, Alaska Airlines, Cathay Pacific, Frontier, Hainan Airlines, Korean Air, Philippine Airlines, Turkish Airlines, United.

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

By month, Jan 2027 is the cheapest we've seen at $394 USD and Apr 2027 the most expensive at $513 USD — a spread of 30%.

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.