SEA - ICN

C$ 613 Find Cheap Flights from Seattle to Incheon – Compare and Save

1 adult
1 adult, Economy, 0 bags

Save 25% or more on flights. Compare deals from all over the web.

Never overpay with our price tracking tools.

Filter searches by price, airline and more to find your best flights.

Everything you should know

Cheapest round-trip
C$ 1,206
Typical prices: C$ 493-C$ 1,593
Cathay Pacific
Thu 22/2Wed 7/3
SEA - ICN • 1 stop
Cheapest direct flights
C$ 1,252
Typical prices: C$ 481-C$ 1,602
Delta
Fri 9/11Fri 16/11
SEA - ICN • Direct
Advice from real travellers
Choose an early flight for lighter traffic on Seattle departures to Incheon.
For this long-haul route, pack food and pick an aisle seat for comfort.
Expert advice
+1
Expert advice
+1
Direct flights
You can fly direct with Korean Air, Delta, and Alaska Airlines. Average duration is 12h 03m
Direct flights
+1
Direct flights
+1
Avoid delays
Most punctual • 83% on-time
Best time • Fewest delays
Insights
Insights
When to book
in advance
Our data shows that travellers who book at least 21 weeks in advance save around 72% compared to booking last minute.
Insights
Insights
When to travel
Cheapest • 61% price drop
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Cheapest • Avg C$ 1,211 (round-trip)
Shortest trip • 15h 14m (one-way)
Insights
Insights
Start a new search
KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you enjoy your trip to Incheon Intl Airport!
Flight Deals
Booking Insights
Expert advice
Flight Deals

Cheap Flights from Seattle to Incheon Intl (SEA-ICN)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Seattle to Incheon Intl

Mon, 22 Feb - Sun, 7 Mar
Cathay Pacific Logo
10:25 a.m. - 1:50 p.m.SEA  Seattle/Tacoma Intl-ICN Incheon Intl
34h 25m1 stop Hong Kong Intl
Cathay Pacific Logo
7:35 p.m. - 8:45 a.m.ICN  Incheon Intl-SEA Seattle/Tacoma Intl
30h 10m1 stop Hong Kong Intl
C$ 1,206Cathay Pacific
2 days ago
Wed, 18 Nov - Mon, 7 Dec
Cathay Pacific Logo
10:25 a.m. - 12:40 a.m.SEA  Seattle/Tacoma Intl-ICN Incheon Intl
21h 15m1 stop Hong Kong Intl
Cathay Pacific Logo
3:00 p.m. - 8:45 a.m.ICN  Incheon Intl-SEA Seattle/Tacoma Intl
34h 45m1 stop Hong Kong Intl
C$ 1,207Cathay Pacific
3+ days ago
Mon, 9 Nov - Mon, 16 Nov
Delta Logo
12:30 p.m. - 5:45 p.m.SEA  Seattle/Tacoma Intl-ICN Incheon Intl
12h 15mdirect
Delta Logo
6:45 p.m. - 11:51 a.m.ICN  Incheon Intl-SEA Seattle/Tacoma Intl
10h 06mdirect
C$ 1,252Delta
3+ days ago
Mon, 9 Nov - Tue, 17 Nov
Korean Air Logo
12:10 a.m. - 5:20 a.m.SEA  Seattle/Tacoma Intl-ICN Incheon Intl
12h 10mdirect
Korean Air Logo
9:20 p.m. - 2:10 p.m.ICN  Incheon Intl-SEA Seattle/Tacoma Intl
9h 50mdirect
C$ 1,255Korean Air
3+ days ago
Thu, 4 Mar - Sun, 14 Mar
Cathay Pacific Logo
10:25 a.m. - 6:35 p.m.SEA  Seattle/Tacoma Intl-ICN Incheon Intl
39h 10m1 stop Hong Kong Intl
Cathay Pacific Logo
10:00 a.m. - 8:45 a.m.ICN  Incheon Intl-SEA Seattle/Tacoma Intl
39h 45m1 stop Hong Kong Intl
C$ 1,261Cathay Pacific
11 hours ago
Mon, 9 Nov - Mon, 16 Nov
Korean Air Logo
7:20 a.m. - 5:40 p.m.SEA  Seattle/Tacoma Intl-ICN Incheon Intl
17h 20m1 stop San Francisco
Korean Air Logo
4:10 p.m. - 9:05 a.m.ICN  Incheon Intl-SEA Seattle/Tacoma Intl
9h 55mdirect
C$ 1,262Korean Air
3+ days ago
Tue, 17 Nov - Fri, 11 Dec
Korean Air Logo
12:10 a.m. - 5:20 a.m.SEA  Seattle/Tacoma Intl-ICN Incheon Intl
12h 10mdirect
Korean Air Logo
2:30 p.m. - 5:15 p.m.ICN  Incheon Intl-SEA Seattle/Tacoma Intl
19h 45m1 stop Los Angeles
C$ 1,270Korean Air
3+ days ago
Thu, 5 Nov - Thu, 12 Nov
United Airlines Logo
7:00 a.m. - 4:15 p.m.SEA  Seattle/Tacoma Intl-ICN Incheon Intl
16h 15m1 stop San Francisco
United Airlines Logo
6:00 p.m. - 12:59 a.m.ICN  Incheon Intl-SEA Seattle/Tacoma Intl
23h 59m1 stop San Francisco
C$ 1,273United Airlines
3+ days ago
Sat, 27 Feb - Sun, 7 Mar
Cathay Pacific Logo
10:25 a.m. - 1:50 p.m.SEA  Seattle/Tacoma Intl-ICN Incheon Intl
34h 25m1 stop Hong Kong Intl
Cathay Pacific Logo
1:50 p.m. - 8:45 a.m.ICN  Incheon Intl-SEA Seattle/Tacoma Intl
35h 55m1 stop Hong Kong Intl
C$ 1,276Cathay Pacific
2 days ago
Sat, 14 Nov - Wed, 9 Dec
Cathay Pacific Logo
10:25 a.m. - 6:35 p.m.SEA  Seattle/Tacoma Intl-ICN Incheon Intl
39h 10m1 stop Hong Kong Intl
Cathay Pacific Logo
1:55 a.m. - 8:45 a.m.ICN  Incheon Intl-SEA Seattle/Tacoma Intl
23h 50m1 stop Hong Kong Intl
C$ 1,277Cathay Pacific
3+ days ago
Booking Insights

Price, demand, and travel trends for Seattle to Incheon Intl Airport flights

Use KAYAK data on prices, travel dates, airlines, and seasonal trends to compare options and book flights with more confidence.

How much is a round-trip flight from Seattle to Incheon Intl Airport?

Round-trip flights from Seattle to Incheon Intl Airport typically range from C$ 493 to C$ 1,593. The lowest price found in the past 5 days was C$ 1,206, on Cathay Pacific.

What's the cheapest day of the week to fly from Seattle to Incheon Intl Airport?

Based on deals KAYAK users found in the last 12 months, Wednesday is the cheapest day of the week to fly from Seattle to Incheon Intl Airport. It’s 60% cheaper than the average day, while Sunday is the most expensive, with prices 16% higher.

What is the cheapest month to fly from Seattle to Incheon Intl Airport?

•August is the cheapest month to fly from Seattle to Incheon Intl Airport at C$ 478 round-trip.
•December (C$ 2,118) and October (C$ 1,625) are the most expensive months.
•The price difference between flying in the cheapest and most expensive months is 343% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

When are flights from Seattle to Incheon Intl Airport the cheapest?

Flights from Seattle to Incheon Intl Airport are cheapest 21 weeks before departure. Booking in this window typically costs about 72% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

Expert advice

Expert advice for your flight from Seattle to Incheon Intl

 
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Robert Schrader

Robert Schrader

Expert on Korean Air

One of the web's original travel bloggers, Robert launched his first site Leave Your Daily Hell in 2009. Since then, he's expanded into destination niche sites (one each for Japan, Thailand and Taiwan), in addition to having written for the inflight magazines of Singapore Airlines and Korean Air. Overall, he's visited nearly 100 countries, and flies business as often as possible.

John Walton

John Walton

Expert on Asiana Airlines

Independent aviation journalist John Walton took his first flight at eight weeks old and hasn’t stopped travelling since. A world-renowned expert in airlines and the passenger experience, he writes in depth on aviation, is a resident expert on travel in Japan and France, and offers a uniquely queer perspective on travelling the world.

Key details for Seattle to Incheon Intl Airport flights

Low season

December

Cheapest flight

C$ 613
Beat the crowds with an average 58% drop in traveller numbers.
The most popular month to fly with an average 74% increase in traveller numbers.
One-way flight from Seattle to Incheon Intl Airport

When to book flights from Seattle to Incheon Intl

Are your dates flexible? Find out the best times to travel from Seattle to Incheon Intl based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

Flights from Seattle to Incheon Intl: the best tips from KAYAK users' own experiences

Insights shared by verified travellers who flew the route from Seattle to Incheon Intl 
AngelitaFlew with Korean Air-Mar 2026
Get an earliest flight as possible because of less traffic
AvikFlew with Delta-Dec 2025
Pack food I guess , especially if traveling with little Kids
lizFlew with Asiana Airlines-May 2024
Do try to snooze on long haul flights, bring a good book to read, choose an aisle seat.

Your Seattle to Incheon Intl Airport flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines, and booking tips.

  • What are the earliest and latest flights from Seattle to Incheon Intl Airport?

    These are the earliest and latest flight times available from Seattle to Incheon Intl Airport:

    • Earliest: departs at 12:10 am and lands at 12:13 pm
    • Latest: departs at 1:40 pm and lands at 1:43 am.

    The flight takes about 12h 03m.

  • Which cabin classes can I book on flights from Seattle to Incheon Intl Airport?

    Only Economy Class is available on flights from Seattle to Incheon Intl Airport.

  • How long does a flight from Seattle to Incheon Intl Airport take?

    A direct flight from Seattle to Incheon Intl Airport takes 12h 03m, covering 13,469 km.

  • Do I need a passport to fly from Seattle to Incheon Intl Airport?

    Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

  • How much should I expect to pay for a Seattle to Incheon Intl Airport flight?

    Round-trip flights from Seattle to Incheon Intl Airport range from C$ 493 to C$ 1,593, with an average of C$ 1,223 over the past 12 months. Anything below C$ 493 counts as a good deal.

  • How expensive are last-minute Seattle to Incheon Intl Airport flights?

    Last-minute fares on this route (booked within two weeks of departure) run 55% above the C$ 1,223 route average. Book 21 weeks before departure for the lowest fares.

  • How much can I save by taking a layover when flying from Seattle to Incheon Intl Airport?

    On this route, direct and layover fares are close on average, with direct at C$ 1,220 round-trip and layover options via Hong Kong Intl (HKG) at C$ 1,211.

  • How does on-time performance compare across airlines flying from Seattle to Incheon Intl Airport?

    Delta is slightly above the route average for timely arrivals, while Alaska Airlines has a lower on-time arrival rate. On-time arrival rates on Seattle to Incheon Intl Airport flights are:

    • Delta: 83% on time
    • Alaska Airlines: 83% on time
    • Korean Air: 82% on time

    On average, flights on this route are punctual 81% of the time.

  • Which aircraft model is used most often on flights from Seattle to Incheon Intl Airport?

    The Boeing 787-10 Dreamliner family is used most often on this route, operated mainly by Korean Air and Delta. Other aircraft seen on the route include Boeing 787-9 Dreamliner variants.

  • How are flight departures from Seattle to Incheon Intl Airport spread across the day?

    Afternoon is the busiest departure period on Seattle to Incheon Intl Airport flights, with 50% leaving in that window. Morning departures account for 25%, Night flights for 25%, and Evening flights for 0%.

  • Have flight prices from Seattle to Incheon Intl Airport changed much recently?

    Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about C$ 1,206 to C$ 11,738. That means the highest observed fare was about 10x higher than the lowest one.

  • Which airlines offer Wi-Fi on Seattle to Incheon Intl Airport flights?

    Delta is the only airline on the Seattle to Incheon Intl Airport route offering in-flight Wi-Fi. Pricing depends on fare class.

  • How are flight prices from Seattle to Incheon Intl Airport looking right now?

    One-way fares from Seattle to Incheon Intl Airport are currently lower than usual. Average one-way flight prices are about C$ 646, which is 6% below the typical average for this route.

  • What car rental options are available at Incheon Intl Airport (ICN)?

    Incheon Intl Airport (ICN) hosts 5 major car rental companies, with daily rates starting from around C$ 17 for economy cars. Top options include:

    • WECAR
    • Wheego
    • Yesaway
    • Alamo
    • Enterprise Rent-A-Car

  • Which airports can I use when flying from Seattle to Incheon Intl Airport?

    Flights from Seattle to Incheon Intl Airport usually depart from Seattle/Tacoma Intl (SEA) and arrive at Incheon Intl (ICN).

  • What time of day has the fewest delays on flights from Seattle to Incheon Intl Airport?

    Night flights have the fewest delays on this route, while morning departures tend to have the most.

  • At what point is a flight considered delayed on the route from Seattle to Incheon Intl Airport?

    A flight is considered delayed when it departs 15 minutes or more after its scheduled time. This is the standard used by the US Department of Transportation and most airline industry reporting. On the Seattle to Incheon Intl Airport route, 19% of flights were delayed in the past three months, with delays averaging 2h 06m.

  • Which airports do connecting flights from Seattle to Incheon Intl Airport pass through?

    One-stop flights from Seattle to Incheon Intl Airport most commonly connect through:

    • Vancouver Intl (YVR) – 55% of one-stop connections
    • Hong Kong Intl (HKG) – 22% of one-stop connections
    • Taipei City Taiwan Taoyuan Intl (TPE) – 10% of one-stop connections
    • Calgary (YYC) – 5% of one-stop connections

  • Can I save money by using flexible dates for flights from Seattle to Incheon Intl Airport?

    Yes. Flexible dates can save you up to 66% on flights from Seattle to Incheon Intl Airport. Wednesday is the cheapest departure day at C$ 493 round-trip on average, while Sunday is the most expensive at C$ 1,426, a difference of C$ 933.

    KAYAK's flexible dates feature shows options up to three days before and after your selected dates, making it easier to compare nearby fares.

  • Which airlines fly from Seattle to Incheon Intl Airport?

    3 airlines operate flights between Seattle and Incheon Intl Airport. The airlines offering direct flights on this route include:

    • Korean Air
    • Delta
    • Alaska Airlines

  • How much time can I save by choosing a different layover airport when travelling from Seattle to Incheon Intl Airport?

    Flying via Calgary (YYC) gives the shortest average 1-stop total travel time at 15h 14m, compared with 15h 20m via Vancouver Intl (YVR) and 17h via Taipei City Taiwan Taoyuan Intl (TPE).

  • What is the time difference between Seattle and Incheon Intl Airport?

    Incheon Intl Airport is 16 hours ahead of Seattle (Korean Time vs Pacific Time). Plan for the time shift when scheduling connections or first-day activities.

  • Which popular places can I visit in Incheon Intl Airport?

    Some of the most popular sights in Incheon Intl Airport are Songdo Convensia and Songdo Central Park. These are among the most viewed places in Incheon Intl Airport on KAYAK.

  • Which airlines offer extra legroom and free seat selection on Seattle to Incheon Intl Airport flights?

    Among airlines operating Seattle to Incheon Intl Airport flights:

    • Korean Air: offers extra legroom; offers free seat selection
    • Delta: offers extra legroom; offers free seat selection
    • Alaska Airlines: offers free seat selection
    • Asiana Airlines: offers free seat selection

    Extra legroom and free seat selection availability depends on fare class and route.

  • Which airlines include bags at no extra cost on Seattle to Incheon Intl Airport flights?

    Here are some options for this route, based on selected ticket types and cabin classes:

    • Korean Air: a carry-on bag and a checked bag in Economy Class
    • Delta: a carry-on bag and a checked bag in Economy Class
    • Alaska Airlines: a carry-on bag and a checked bag in Economy Class

    Baggage allowance can vary by ticket type, cabin class, route, and airline, so always check the fare details before booking.

Your guide to booking Seattle to Incheon Intl Airport flights

Get tips on when to book, when to fly, and what to know before your trip.
  • If your dates are flexible, aim for a Wednesday departure and avoid flying on Sunday. On this route, Wednesday flights average C$ 493, about C$ 933 less than Sunday fares (65% savings) based on the last 12 months.
  • For the best chance at a low fare, aim to book around 21 weeks before you fly. On this route, that window historically saves about 72% versus last-minute pricing (KAYAK booking data, last 12 months).
  • If you can choose when to travel, plan your Seattle to Incheon Intl Airport trip for August. Fares historically average C$ 478 round-trip in that month – typically C$ 1,640 less than the most expensive month, which is December (based on the last 12 months).
  • For the best chance of arriving on time, fly with Delta. Over the past three months, 83% of Delta flights from Seattle to Incheon Intl Airport arrived on time, slightly above the route average of 81%. When flights on this route arrive late, they're delayed by an average of 2h 06m, so choosing an airline with strong on-time performance can make a difference if you're on a tight schedule.
  • If you have the time, taking a 1-stop flight through Hong Kong Intl Airport (HKG) can be cheaper than flying direct. The cheapest layover option averages C$ 1,211 round-trip on this route – about C$ 9 less than direct flights (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to Incheon Intl Airport.

    • Grand Hyatt Incheon
    • Hotel Ora Incheon
    • Best Western Premier Incheon Airport

Prefer to fly direct from Seattle to Incheon?

 
Find which airlines fly direct from Seattle/Tacoma Intl Airport to Incheon Intl Airport, which days they fly and book direct flights.

Direct departures

Seattle/Tacoma Intl to Incheon Intl

Monday

Delta,Korean Air

Delta,Korean Air

Tuesday

Delta,Korean Air

Delta,Korean Air

Wednesday

Alaska Airlines,Delta,Korean Air

Alaska Airlines,Delta, +1 more

Thursday

Alaska Airlines,Delta,Korean Air

Alaska Airlines,Delta, +1 more

Friday

Alaska Airlines,Delta,Korean Air

Alaska Airlines,Delta, +1 more

Saturday

Alaska Airlines,Delta,Korean Air

Alaska Airlines,Delta, +1 more

Sunday

Alaska Airlines,Delta,Korean Air

Alaska Airlines,Delta, +1 more

See more nonstop flights

Direct returns

Incheon Intl to Seattle/Tacoma Intl

Monday

Alaska Airlines,Delta,Korean Air

Alaska Airlines,Delta, +1 more

Tuesday

Delta,Korean Air

Delta,Korean Air

Wednesday

Delta,Korean Air

Delta,Korean Air

Thursday

Alaska Airlines,Delta,Korean Air

Alaska Airlines,Delta, +1 more

Friday

Alaska Airlines,Delta,Korean Air

Alaska Airlines,Delta, +1 more

Saturday

Alaska Airlines,Delta,Korean Air

Alaska Airlines,Delta, +1 more

Sunday

Alaska Airlines,Delta,Korean Air

Alaska Airlines,Delta, +1 more

See more nonstop flights

More options for your flight from Seattle to Incheon Intl

Complete your trip to Incheon with a hotel stay or car rental