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Seattle-Tacoma International Airport to Incheon International Airport flight

Explore the cheapest one-way and round-trip flights from Seattle-Tacoma International Airport to Incheon International Airport over the next 90 days, with one-way fares from US$387 and round-trip from US$742. Based on Trip.com's latest 7-day flight data.

      • Cheapest nonstop
        SEA 12:50
        11h 50m
        Nonstop
        ICN 16:40
        Seattle - Seoul | Tue, Sep 15 | Korean Air
        ICN 16:40
        10h
        Nonstop
        SEA 10:40
        Seoul - Seattle | Thu, Sep 17 | Korean Air
        US$1,123 US$1,524
        26% off
        26% off
        US$1,524 US$1,123
      • SEA 11:00
        11h 55m
        Nonstop
        ICN 15:55
        Seattle - Seoul | Tue, Nov 10 | Korean Air
        ICN 16:10
        9h 55m
        Nonstop
        SEA 09:05
        Seoul - Seattle | Mon, Nov 16 | Korean Air
        US$1,158 US$1,524
        24% off
        24% off
        US$1,524 US$1,158
      • SEA 07:18
        21h 2m
        1 stop
        ICN 21:20
        Seattle - Seoul | Sun, Nov 8 | Alaska Airlines
        ICN 19:45
        20h 28m
        1 stop
        SEA 23:13
        Seoul - Seattle | Fri, Nov 13 | Air Premia
        US$742 US$1,524
        51% off
        51% off
        US$1,524 US$742
      • SEA 07:18
        21h 2m
        1 stop
        ICN 21:20
        Seattle - Seoul | Sun, Nov 1 | Alaska Airlines
        ICN 19:45
        18h 18m
        1 stop
        SEA 21:03
        Seoul - Seattle | Wed, Nov 4 | Air Premia
        US$742
        51% off
        US$1,524 US$742
      • SEA 06:39
        23h 1m
        1 stop
        ICN 21:40
        Seattle - Seoul | Wed, Oct 21 | Alaska Airlines
        ICN 19:15
        19h 48m
        1 stop
        SEA 23:03
        Seoul - Seattle | Fri, Oct 23 | Air Premia
        US$744
        51% off
        US$1,524 US$744
      • SEA 07:18
        21h 2m
        1 stop
        ICN 21:20
        Seattle - Seoul | Fri, Nov 6 | Alaska Airlines
        ICN 19:45
        20h 28m
        1 stop
        SEA 23:13
        Seoul - Seattle | Fri, Nov 13 | Air Premia
        US$813
        47% off
        US$1,524 US$813
      • SEA 08:54
        19h 26m
        1 stop
        ICN 21:20
        Seattle - Seoul | Wed, Nov 11 | Alaska Airlines
        ICN 19:45
        20h 28m
        1 stop
        SEA 23:13
        Seoul - Seattle | Fri, Nov 13 | Air Premia
        US$813
        47% off
        US$1,524 US$813
      • SEA 06:39
        22h 41m
        1 stop
        ICN 21:20
        Seattle - Seoul | Wed, Oct 28 | Alaska Airlines
        ICN 19:45
        18h 18m
        1 stop
        SEA 21:03
        Seoul - Seattle | Wed, Nov 4 | Air Premia
        US$813
        47% off
        US$1,524 US$813
      • SEA 21:36
        31h 44m
        1 stop
        ICN 21:20
        Seattle - Seoul | Thu, Oct 29 | Alaska Airlines
        ICN 19:45
        18h 18m
        1 stop
        SEA 21:03
        Seoul - Seattle | Wed, Nov 4 | Air Premia
        US$813
        47% off
        US$1,524 US$813
      • SEA 06:39
        21h 31m
        1 stop
        ICN 20:10
        Seattle - Seoul | Sat, Oct 24 | Alaska Airlines
        ICN 19:45
        16h 11m
        1 stop
        SEA 19:56
        Seoul - Seattle | Mon, Oct 26 | Air Premia
        US$813
        47% off
        US$1,524 US$813
      • SEA 06:39
        22h 41m
        1 stop
        ICN 21:20
        Seattle - Seoul | Fri, Oct 30 | Alaska Airlines
        ICN 19:45
        18h 18m
        1 stop
        SEA 21:03
        Seoul - Seattle | Wed, Nov 4 | Air Premia
        US$813
        47% off
        US$1,524 US$813
      • SEA 08:54
        19h 26m
        1 stop
        ICN 21:20
        Seattle - Seoul | Sat, Nov 7 | Alaska Airlines
        ICN 19:45
        20h 28m
        1 stop
        SEA 23:13
        Seoul - Seattle | Fri, Nov 13 | Air Premia
        US$815
        47% off
        US$1,524 US$815
      • SEA 08:54
        19h 26m
        1 stop
        ICN 21:20
        Seattle - Seoul | Wed, Nov 4 | Alaska Airlines
        ICN 19:45
        20h 28m
        1 stop
        SEA 23:13
        Seoul - Seattle | Fri, Nov 6 | Air Premia
        US$815
        47% off
        US$1,524 US$815
      • SEA 09:59
        19h 21m
        1 stop
        ICN 21:20
        Seattle - Seoul | Sat, Oct 31 | Alaska Airlines
        ICN 19:45
        18h 18m
        1 stop
        SEA 21:03
        Seoul - Seattle | Sat, Nov 7 | Air Premia
        US$821
        46% off
        US$1,524 US$821
      • SEA 13:00
        17h 25m
        1 stop
        SEL 14:00
        Seattle - Seoul | Wed, Sep 16 | Normal Airline
        SEL 15:00
        6h
        Nonstop
        SEA 16:00
        Seoul - Seattle | Fri, Sep 18 | Normal Airline
        More cheap flights
        More cheap flights
      • Cheapest nonstop
        SEA 11:00
        11h 55m
        Nonstop
        ICN 15:55
        Seattle - Seoul | Thu, Nov 12 | Korean Air
        US$474 US$629
        25% off
        25% off
        US$629 US$474
      • SEA 13:40
        11h 55m
        Nonstop
        ICN 18:35
        Seattle - Seoul | Thu, Nov 12 | Alaska Airlines
        US$478 US$629
        24% off
        24% off
        US$629 US$478
      • SEA 06:39
        22h 41m
        1 stop
        ICN 21:20
        Seattle - Seoul | Fri, Oct 30 | Alaska Airlines
        US$387 US$629
        38% off
        38% off
        US$629 US$387
      • SEA 21:36
        30h 34m
        1 stop
        ICN 20:10
        Seattle - Seoul | Fri, Oct 23 | Alaska Airlines
        US$390
        38% off
        US$629 US$390
      • SEA 13:50
        38h 30m
        1 stop
        ICN 21:20
        Seattle - Seoul | Thu, Nov 5 | Alaska Airlines
        US$390
        38% off
        US$629 US$390
      • SEA 07:18
        21h 2m
        1 stop
        ICN 21:20
        Seattle - Seoul | Sun, Nov 1 | Alaska Airlines
        US$390
        38% off
        US$629 US$390
      • SEA 13:55
        39h 25m
        1 stop
        ICN 21:20
        Seattle - Seoul | Sat, Oct 31 | Alaska Airlines
        US$390
        38% off
        US$629 US$390
      • SEA 07:18
        21h 2m
        1 stop
        ICN 21:20
        Seattle - Seoul | Sun, Nov 8 | Alaska Airlines
        US$390
        38% off
        US$629 US$390
      • SEA 21:36
        31h 44m
        1 stop
        ICN 21:20
        Seattle - Seoul | Thu, Oct 29 | Alaska Airlines
        US$391
        38% off
        US$629 US$391
      • SEA 07:16
        22h 24m
        1 stop
        ICN 21:40
        Seattle - Seoul | Fri, Oct 23 | Delta Air Lines
        US$392
        38% off
        US$629 US$392
      • SEA 21:35
        30h 45m
        1 stop
        ICN 21:20
        Seattle - Seoul | Thu, Nov 5 | Delta Air Lines
        US$392
        38% off
        US$629 US$392
      • SEA 21:35
        31h 45m
        1 stop
        ICN 21:20
        Seattle - Seoul | Tue, Oct 27 | Delta Air Lines
        US$393
        38% off
        US$629 US$393
      • SEA 21:35
        31h 45m
        1 stop
        ICN 21:20
        Seattle - Seoul | Sat, Oct 31 | Delta Air Lines
        US$393
        38% off
        US$629 US$393
      • SEA 07:16
        22h 4m
        1 stop
        ICN 21:20
        Seattle - Seoul | Wed, Oct 28 | Delta Air Lines
        US$393
        38% off
        US$629 US$393
      • SEA 13:00
        17h 25m
        1 stop
        SEL 14:00
        Seattle - Seoul | Wed, Sep 16 | Normal Airline
        More cheap flights
        More cheap flights

Displayed flight fares from Seattle-Tacoma International Airport to Incheon International Airport are based on average prices across airlines for the next 3 months, according to the latest Trip.com database.

Trip.com Price Insights: Flights from Seattle-Tacoma International Airport to Incheon International Airport

Which month offers the lowest one-way fares when flying from Seattle-Tacoma International Airport to Incheon International Airport?

Data is based on the past 12 months. It shows the average one-way fares by month for flights from Seattle-Tacoma International Airport to Incheon International Airport on Trip.com.

Based on Trip.com data from the past 12 months, for cheaper one-way flights from Seattle-Tacoma International Airport to Incheon International Airport, it is best to book in September, when average fares are US$478. Try to avoid December, as fares peak at around US$774.

US$774
US$626
US$478
US$330
  • US$478
    Sep
  • US$620
    Oct
  • US$498
    Nov
  • US$774
    Dec
  • US$506
    Jan
  • US$502
    Feb
  • US$588
    Mar
  • US$574
    Apr
  • US$656
    May
  • US$760
    Jun
  • US$569
    Jul
  • US$598
    Aug

Which month offers the lowest round-trip fares from Seattle-Tacoma International Airport to Incheon International Airport?

Data is based on the past 12 months. It shows the average round-trip fares by month for flights from Seattle-Tacoma International Airport to Incheon International Airport on Trip.com.

Based on Trip.com data from the past 12 months, February usually offers the lowest round-trip fares from Seattle-Tacoma International Airport to Incheon International Airport, with an average price of US$920. December is typically the most expensive month, with average fares reaching US$1,530.

US$1,530
US$1,225
US$920
US$615
    Cheapest
  • US$1,014
    Sep
  • US$1,270
    Oct
  • US$1,011
    Nov
  • US$1,530
    Dec
  • US$950
    Jan
  • US$920
    Feb
  • US$1,096
    Mar
  • US$940
    Apr
  • US$1,237
    May
  • US$1,510
    Jun
  • US$1,127
    Jul
  • US$1,219
    Aug

Which day of the week offers the cheapest flights from Seattle-Tacoma International Airport to Incheon International Airport?

Data is based on the past 12 months. It shows the average fares by day of the week for flights from Seattle-Tacoma International Airport to Incheon International Airport on Trip.com.

Based on Trip.com data from the past 12 months, the cheapest day to depart from Seattle-Tacoma International Airport to Incheon International Airport is Tuesday, when average fares are usually lower than other days. Avoid departing on Saturday, as fares are typically the highest.

US$672
US$629
US$585
US$542
  • US$631
    Mon
  • US$585
    Tue
  • US$620
    Wed
  • US$636
    Thu
  • US$620
    Fri
  • US$672
    Sat
  • US$599
    Sun

Which airline offers the cheapest flights from Seattle-Tacoma International Airport to Incheon International Airport?

The cheapest airline flying from Seattle-Tacoma International Airport to Incheon International Airport is Alaska Airlines (from US$387) among 10 carriers operating this route. Based on Trip.com's latest 7-day flight data.

Alaska Airlines
From US$387
Delta Air Lines
From US$392
Cathay Pacific
From US$420
Hainan Airlines
From US$442
Air Canada
From US$452
China Airlines
From US$467
Korean Air
From US$474
United Airlines
From US$481
American Airlines
From US$496
WestJet
From US$503

Find more flights and airlines

What is the flight schedule from Seattle-Tacoma International Airport to Incheon International Airport?

Check on the flight schedule from Seattle to Seoul to find the flight that matches your travel plan.

Flight info.
Departure
Arrival
Weekly Schedule

  1. DL1412

    Seattle-Tacoma International Airport

    10:55

    SEA

    2h 18m

    Nonstop

    13:13

    SFO

    S M T W T F S
    Search

  2. YP112

    San Francisco International Airport

    15:20

    SFO

    13h

    Nonstop

    21:20

    ICN

    S - T - T - -

  3. AS528

    Seattle-Tacoma International Airport

    08:41

    SEA

    2h 18m

    Nonstop

    10:59

    SFO

    S M T W T F S
    Search

  4. YP112

    San Francisco International Airport

    15:20

    SFO

    13h

    Nonstop

    21:20

    ICN

    S - T - T - -

  5. AS725

    Seattle-Tacoma International Airport

    07:18

    SEA

    2h 23m

    Nonstop

    09:41

    SFO

    S M T W T F S
    Search

  6. YP114

    San Francisco International Airport

    15:30

    SFO

    12h 40m

    Nonstop

    20:10

    ICN

    - - - - - F -

  7. AS725

    Seattle-Tacoma International Airport

    07:18

    SEA

    2h 23m

    Nonstop

    09:41

    SFO

    S M T W T F S
    Search

  8. YP112

    San Francisco International Airport

    15:20

    SFO

    13h

    Nonstop

    21:20

    ICN

    S - T - T - -

  9. DL2635

    Seattle-Tacoma International Airport

    21:25

    SEA

    2h 16m

    Nonstop

    23:41

    SFO

    S M T W T F S
    Search

  10. YP112

    San Francisco International Airport

    15:20

    SFO

    13h

    Nonstop

    21:20

    ICN

    S - T - T - -

  11. AS619

    Seattle-Tacoma International Airport

    19:33

    SEA

    2h 10m

    Nonstop

    21:43

    SFO

    S M T W T F S
    Search

  12. YP112

    San Francisco International Airport

    15:20

    SFO

    13h

    Nonstop

    21:20

    ICN

    S - T - T - -

  13. CX853

    Seattle-Tacoma International Airport

    11:45

    SEA

    14h

    Nonstop

    16:45

    HKG

    S M T W T F -
    Search

  14. CX410

    Hong Kong International Airport

    10:38

    HKG

    3h 36m

    Nonstop

    15:14

    ICN

    S M T W T F S

  15. AS688

    Seattle-Tacoma International Airport

    13:36

    SEA

    2h 11m

    Nonstop

    15:47

    SFO

    S M T W T F S
    Search

  16. YP112

    San Francisco International Airport

    15:20

    SFO

    13h

    Nonstop

    21:20

    ICN

    S - T - T - -

  17. CX853

    Seattle-Tacoma International Airport

    11:45

    SEA

    14h

    Nonstop

    16:45

    HKG

    S M T W T F -
    Search

  18. CX418

    Hong Kong International Airport

    14:00

    HKG

    3h 35m

    Nonstop

    18:35

    ICN

    S M T W T F S

  19. HU446

    Seattle-Tacoma International Airport

    11:55

    SEA

    14h 30m

    Nonstop

    17:25

    CKG

    - - - W - - -
    Search

  20. HU446

    Chongqing Jiangbei International Airport

    18:55

    CKG

    2h 5m

    Nonstop

    21:00

    HAK

    - - - - T - -

  21. HU449

    Haikou Meilan International Airport

    15:20

    HAK

    4h 5m

    Nonstop

    20:25

    ICN

    S - T - T F -
Find more flights and airlines

About Seattle-Tacoma International Airport and Incheon International Airport

Learn about Seattle-Tacoma International Airport (SEA) and Incheon International Airport (ICN) — including location, terminals, transportation, and travel tips.

Flight distance8,385.19 km
Cheapest one-way ticket priceUS$387
Cheapest return ticket priceUS$742

FAQs for Seattle-Tacoma International Airport to Incheon International Airport Flights

  • How long is the flight from Seattle-Tacoma International Airport to Incheon International Airport?

    Seattle-Tacoma International Airport to Incheon International Airport takes about 11 hours 26 minutes on average. Actual flight time may vary depending on route, weather and air traffic.
  • There are around 5 daily flights from Seattle-Tacoma International Airport (SEA) to Incheon International Airport (ICN).
  • The earliest flight from Seattle-Tacoma International Airport to Incheon International Airport departs at 00:10, and the last departs at 13:35, with about 9 flights per day. Flight times may change, so please check the latest departure and arrival times before you travel.
  • The route from Seattle-Tacoma International Airport (SEA) to Incheon International Airport (ICN) is quite popular. Without considering departure times or holidays, tickets cost around US$671 in October, the most expensive month to book this route.
  • The latest flight departs from Seattle-Tacoma International Airport at 19:00 and arrives in Incheon International Airport at 23:55.
    • The distance from Incheon International Airport to downtown is about 48 km, by taxi about 1 hour.
    • The distance from Gimpo International Airport to downtown is about 15 km, by taxi about 30 minutes.
  • Delta Air Lines is a very popular airline operating an average of 1717 flights per month.
  • Yes. Delta Air Lines, Korean Air, Alaska Airlines, Asiana Airlines and Singapore Airlines operate direct flights from Seattle-Tacoma International Airport to Incheon International Airport, with an average flight time of 27 hours 6 minutes, and around 8 weekly flights. Actual flight frequency may vary by season.
  • Based on Trip.com flight data for departures within the next 30 days with at most one stop, the average one-way price from Seattle-Tacoma International Airport to Incheon International Airport is US$675. Prices may vary depending on the departure date, airline, and availability.
  • Seattle-Tacoma International Airport to Incheon International Airport operates around 13 weekly flights, mainly by Korean Air, Alaska Airlines and Delta Air Lines. Actual frequency may vary during holidays and seasonal schedule adjustments.
  • Enter Seattle-Tacoma International Airport and Incheon International Airport, select your departure date and number of passengers, then compare flights by price, flight duration, and baggage allowance. Once you've chosen a fare, review the change and refund rules, fill in passenger details, and pay to receive your booking confirmation.

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Note: Prices shown on this page are the estimated lowest prices found in the last 24 hours and include all taxes and fees.

Book with no extra fees

Prices displayed on this page are all-inclusive (incl. taxes, fuel surcharges, Civil Aviation Development Fund, etc.), and all fees are clearly shown before you pay. Charges for checked baggage, onboard meals, Wi‑Fi, and other optional services are also included where applicable in the flight cards.

Real-time pricing updates

Prices, availability, and travel details on this page have been updated within the last 24 hours, and for many routes are refreshed in real time. The more popular the route, the more accurate and up-to-date the data.

Change & Cancellation Policy

Trip.com shows the change and cancellation rules for each ticket during the booking process, including all related fees and conditions. Please refer to the following scenarios:
Voluntary cancellation/change:
To request a change or cancellation, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and flight segment, and submit your request. Please note that additional charges may apply based on the airline’s fare rules.
Cancellation/change due to a flight schedule change:
If your flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For full details of change and cancellation policies, please refer to the customer support pages.