SEA - SEL

$396 Find Cheap Flights from Seattle to Seoul - Compare and Save

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Everything you should know

Cheapest round-trip
$870
Typical prices: $356-$1,061
Cathay Pacific
Mon 9/10Sat 9/22
SEA - ICN • 1 stop
Cheapest non-stop
$1,009
Typical prices: $347-$1,053
Asiana Airlines
Mon 9/17Tue 10/2
SEA - ICN • Non-stop
Advice from real travelers
Korean Air includes checked bags on long-haul fares from Seattle to Seoul.
Asiana Economy Smartium adds legroom; some 777s use roomier 9-seat rows.
Expert advice
+1
Expert advice
+1
Nonstop flights
You can fly direct with Korean Air, Delta and others. Average duration is 11h 58m.
Direct flights
+1
Direct flights
+1
Top routes
Cheapest • 16% average savings
Most popular
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 21 weeks in advance save around 69% 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 $860 (round-trip)
Shortest trip • 15h 14m (one-way)
Insights
Insights
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We hope you love your trip to Seoul!
Flight Deals
Booking Insights
Expert advice
Flight Deals

Cheap Flights from Seattle to Seoul (SEA-SEL)

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

Recent round-trip flight deals from Seattle to Seoul

Wed, Sep 16 - Tue, Sep 22
Cathay Pacific Logo
11:45 am - 12:25 amSEA  Seattle/Tacoma Intl-ICN Incheon Intl
20h 40m1 stop Hong Kong Intl
Cathay Pacific Logo
8:00 am - 10:05 amICN  Incheon Intl-SEA Seattle/Tacoma Intl
18h 05m1 stop Hong Kong Intl
$870Cathay Pacific
Thu, Sep 10 - Tue, Sep 22
Cathay Pacific Logo
12:25 pm - 12:25 amSEA  Seattle/Tacoma Intl-ICN Incheon Intl
20h 00m1 stop Hong Kong Intl
Cathay Pacific Logo
1:55 am - 10:05 amICN  Incheon Intl-SEA Seattle/Tacoma Intl
24h 10m1 stop Hong Kong Intl
$870Cathay Pacific
Wed, Sep 23 - Sat, Oct 10
Multiple Airlines Logo
12:05 pm - 9:40 pmSEA  Seattle/Tacoma Intl-ICN Incheon Intl
17h 35m1 stop San Francisco
Multiple Airlines Logo
6:00 pm - 10:00 pmICN  Incheon Intl-SEA Seattle/Tacoma Intl
20h 00m1 stop San Francisco
$870Multiple Airlines
Wed, Sep 23 - Wed, Oct 7
Multiple Airlines Logo
12:05 pm - 9:40 pmSEA  Seattle/Tacoma Intl-ICN Incheon Intl
17h 35m1 stop San Francisco
Multiple Airlines Logo
7:15 pm - 6:33 pmICN  Incheon Intl-SEA Seattle/Tacoma Intl
15h 18m1 stop San Francisco
$870Multiple Airlines
Fri, Sep 18 - Fri, Oct 2
Air Canada Logo
7:15 pm - 4:05 pmSEA  Seattle/Tacoma Intl-ICN Incheon Intl
28h 50m1 stop Vancouver Intl
Air Canada Logo
7:45 pm - 6:32 pmICN  Incheon Intl-SEA Seattle/Tacoma Intl
38h 47m2 stops Hong Kong Intl Vancouver Intl
$924Air Canada
Sun, Nov 1 - Sat, Nov 7
Air Canada Logo
8:40 am - 5:10 pmSEA  Seattle/Tacoma Intl-ICN Incheon Intl
15h 30m1 stop Vancouver Intl
Air Canada Logo
6:55 pm - 6:22 pmICN  Incheon Intl-SEA Seattle/Tacoma Intl
16h 27m1 stop Vancouver Intl
$936Air Canada
Sun, Sep 6 - Wed, Sep 16
Asiana Airlines Logo
5:50 am - 4:05 pmSEA  Seattle/Tacoma Intl-ICN Incheon Intl
18h 15m1 stop Vancouver Intl
Asiana Airlines Logo
5:45 pm - 10:47 pmICN  Incheon Intl-SEA Seattle/Tacoma Intl
21h 02m1 stop Vancouver Intl
$995Asiana Airlines
Wed, Nov 18 - Sun, Dec 6
Asiana Airlines Logo
8:40 am - 5:10 pmSEA  Seattle/Tacoma Intl-ICN Incheon Intl
15h 30m1 stop Vancouver Intl
Asiana Airlines Logo
6:55 pm - 9:57 pmICN  Incheon Intl-SEA Seattle/Tacoma Intl
20h 02m1 stop Vancouver Intl
$995Asiana Airlines
Thu, Sep 3 - Mon, Sep 7
Korean Air Logo
12:50 pm - 4:40 pmSEA  Seattle/Tacoma Intl-ICN Incheon Intl
11h 50mnonstop
Korean Air Logo
4:40 pm - 10:40 amICN  Incheon Intl-SEA Seattle/Tacoma Intl
10h 00mnonstop
$1,141Korean Air
Sat, Oct 17 - Sat, Oct 31
Korean Air Logo
12:50 pm - 4:40 pmSEA  Seattle/Tacoma Intl-ICN Incheon Intl
11h 50mnonstop
Korean Air Logo
6:45 pm - 12:51 pmICN  Incheon Intl-SEA Seattle/Tacoma Intl
10h 06mnonstop
$1,164Korean Air
Booking Insights

Price, demand and travel trends for Seattle to Seoul flights

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

How much is a round-trip flight from Seattle to Seoul?

Round-trip flights from Seattle to Seoul start at $870. Prices are typical for this route right now, with typical round-trip fares ranging from $356 to $1,061. The lowest price found in the past 5 days was $870 on Cathay Pacific.

What is the cheapest Seattle to Seoul flight route?

Seattle (SEA) to Incheon Intl Airport (ICN) is the cheapest Seattle to Seoul route, averaging $866 round-trip. Other Seattle to Seoul routes average $1,194, based on KAYAK data over the past 12 months.

What's the cheapest day of the week to fly from Seattle to Seoul?

Wednesday is the cheapest day of the week to fly from Seattle to Seoul, it is 59% cheaper than the average day. Sunday is the most expensive day with flight prices 5% higher than average. Based on deals found by KAYAK users in the last 12 months.

What is the cheapest month to fly from Seattle to Seoul?

  • August is the cheapest month to fly from Seattle to Seoul at $342 round-trip.
  • December ($1,390) and June ($1,075) are the most expensive months.
  • The price difference between flying in the cheapest and most expensive months is 306% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

When are prices from Seattle to Seoul the cheapest?

Flights from Seattle to Seoul are cheapest 21 weeks before departure. Booking in this window typically costs about 69% 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 Seoul

 
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 and ICN

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.

Harriet Baskas

Harriet Baskas

Expert on SEA

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Key details for Seattle to Seoul flights

Low season

January

Cheapest flight

$396
Flight from Seattle to Incheon Intl Airport

When to book flights from Seattle to Seoul

Are your dates flexible? Find out the best times to travel from Seattle to Seoul 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 Seoul: the best tips from KAYAK users' own experiences

Insights shared by verified travelers who flew the route from Seattle to Seoul 
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 Seoul flight questions, answered

Find helpful route details based on KAYAK data, including flight times, airports, airlines and booking questions.

  • Will I need a visa to travel from Seattle to Seoul?

    U.S. citizens traveling from Seattle to Seoul for tourism or business purposes can enter South Korea without a visa for up to 90 days. This is valid as long as the purpose of the visit is not to engage in paid work or long-term employment. Visa requirements can change over time, so it is essential to verify the current visa policy before traveling.

  • What are some good ways to get to downtown Seoul from Incheon International Airport?

    One choice would be to take the bus offered by Seoul Bus, which makes the trip in around 1h 14min, with buses leaving every hour or so. There is also a train operated by AREX that makes this trip in about 1 hour, with trains leaving every 15 minutes or so.

  • Which airport should I choose for my flight to Seoul?

    Incheon International Airport is by far the larger of the two airports and serves as a hub for over 80 airlines that are both domestic and international. If you do plan on traveling somewhere else in Korea after your flight to Seoul, Gimpo International Airport can make a much better choice since this airport focuses heavily on domestic travel to places like Busan, Daegu, and Jeju Island.

  • What are some of the amenities at Seattle Tacoma International Airport for passengers with limited mobility?

    Some features this airport offers include visual paging boards and assistive listening devices for individuals with hearing impairments. The airport features accessible restrooms equipped with spacious stalls, grab bars, and accessible sinks. There are tactile maps and wayfinding signage with braille that are available throughout the airport to assist passengers with visual impairments in navigating the terminals.

  • Which airlines offer extra legroom and free seat selection on Seattle to Seoul flights?

    Among airlines operating Seattle to Seoul flights:

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

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

  • What airlines are available from Seattle to Seoul?

    4 airlines operate flights between Seattle and Seoul. The airlines offering nonstop flights on this route include:
    • Korean Air
    • Delta
    • Alaska Airlines
    • Asiana Airlines

  • Which airports can I use when flying from Seattle to Seoul?

    Flights from Seattle to Seoul usually depart from Seattle/Tacoma Intl (SEA) and may arrive at several airports in Seoul area, including Seoul Gimpo Intl (GMP) and Incheon Intl (ICN).

  • Which airlines include bags at no extra cost on Seattle to Seoul flights?

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

    • Korean Air: a cabin bag and a checked bag in Economy Class
    • Alaska Airlines: a cabin bag and a checked bag in Economy Class
    • Asiana Airlines: a cabin bag and a checked bag in Economy Class

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

  • What cabin classes can I book on flights from Seattle to Seoul?

    Three cabin classes are available on flights from Seattle to Seoul:

    • Economy Class
    • Premium Economy Class
    • Business Class

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

    On this route, nonstop and layover fares are close on average, with nonstop at $864 round-trip and layover options via Vancouver Intl (YVR) at $860.

  • Which airports do connecting flights from Seattle to Seoul pass through?

    One-stop flights from Seattle to Seoul most commonly connect through:

    • Vancouver Intl (YVR) - 64% of one-stop connections
    • Hong Kong Intl (HKG) - 14% of one-stop connections
    • Taipei City Taiwan Taoyuan Intl (TPE) - 7% of one-stop connections
    • Calgary (YYC) - 6% of one-stop connections

    Vancouver Intl (YVR) handles the largest share of one-stop connections on this route.

  • Can I save money by using flexible dates for flights from Seattle to Seoul?

    Yes. Being flexible with your travel dates can save you up to 61% on the Seattle to Seoul route. Wednesday is the cheapest departure day at $356 round-trip on average, while Sunday is the most expensive at $911, a difference of $555. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • How are flight departures from Seattle to Seoul spread across the day?

    Afternoon is the busiest departure period on Seattle to Seoul flights, with 75% of flights leaving in that window. Night departures account for 25%, morning flights for 0%, and evening flights for 0%.

  • What popular places can I visit in Seoul?

    Some of the most popular sights in Seoul are Hongdae Area, Myeongdong Shopping Street and Seoul Station. These are among the most viewed places in Seoul on KAYAK.

  • How long is a flight from Seattle to Seoul?

    A nonstop flight from Seattle to Seoul takes 11h 58m, covering 5,176 miles.

  • What are the earliest and latest flights from Seattle to Seoul?

    These are the earliest and latest flight times available from Seattle to Seoul:

    • Earliest: departs at 12:10 am and lands at 12:08 pm
    • Latest: departs at 1:40 pm and lands at 1:38 am.

    The flight takes about 11h 58m.

  • How expensive are last-minute Seattle to Seoul flights?

    Last-minute fares on this route - booked within 2 weeks of departure - run 40% above the route average of $866. Book 21 weeks before departure for the lowest fares.

  • Do I need a passport to fly from Seattle to Seoul?

    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 are flight prices from Seattle to Seoul looking right now?

    One-way fares from Seattle to Seoul are currently higher than usual. Average one-way flight prices are about $524, which is 13% above the typical average for this route.

  • How much time can I save by choosing a different layover airport from Seattle to Seoul?

    Flying via Calgary (YYC) gives the shortest average 1-stop total travel time at 15h 14m, compared with 15h 18m via Vancouver Intl (YVR) and 16h 24m via Taipei City Taiwan Taoyuan Intl (TPE).

  • What is the time difference between Seattle and Seoul?

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

  • What car rental options are available in Seoul?

    Since Seoul is served by multiple airports, car rental options and rates can vary depending on which one you fly into.
    Near Incheon Intl Airport (ICN) — daily rates from around $12:

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

    Near Seoul Gimpo Intl Airport (GMP) — daily rates from around $12:

    · Yesaway
    · Hi Rent
    · Wheego
    · Europcar
    · Bella Jeju

  • How much should I expect to pay for a Seattle to Seoul flight?

    Round-trip flights from Seattle to Seoul range from $356 to $1,061, with an average of $866 over the past 12 months. Anything below $356 counts as a good deal.

  • Which airlines offer Wi-Fi on Seattle to Seoul flights?

    Two airlines offer in-flight Wi-Fi on Seattle to Seoul flights:

    • • Delta
    • • JetBlue

    Pricing varies by airline and fare class. Some plans are included with the ticket or loyalty program; others are paid add-ons priced by flight length.

Your guide to booking Seattle to Seoul flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates can be flexible, aim for a Wednesday departure instead of Sunday. On this route, Wednesday flights average $356 - about $555 less than Sunday (61% 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 69% versus last-minute pricing (KAYAK booking data, last 12 months).
  • If you can choose when to travel, plan your Seattle to Seoul trip for August. Fares historically average $342 round-trip in that month - typically $1,048 less than the most expensive month, which is December (based on the last 12 months).
  • If you have the time, taking a 1-stop flight through Vancouver Intl Airport (YVR) can be cheaper than flying direct. The cheapest layover option averages $860 round-trip on this route - about $4 less than direct flights (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, hotels close to the airport you're flying into can be a convenient option.

    Near Incheon Intl Airport

    · Grand Hyatt Incheon
    · Best Western Premier Incheon Airport
    · Hotel Hu Incheon Airport

    Near Seoul Gimpo Intl Airport

    · The First Stay Hotel
    · Royal Square Hotel Seoul
    · Hotel M Felice
  • If you plan on taking one of the nonstop flights offered by Delta Airlines between Seattle Tacoma International Airport (SEA) and Incheon International Airport (ICN), there is a Delta Sky Club Lounge in Terminal A of Seattle Tacoma International Airport.
  • When flying on Delta Airlines to Seoul in first class, you get priority check-in and security clearance on the ground in Seattle as well as priority boarding. In the air, you get gourmet meals, large and comfortable seats, a dedicated flight attendant, and an entertainment system at your seat.
  • If you want a great way to get from the center of Seattle to Seattle Tacoma International Airport, consider the buses offered by King County Metro that make this trip in roughly 45 minutes. Sound Transit also offers its 1-Line that makes the trip in about 33 minutes.
  • Kids from 5 to 11 years old traveling alone on Korean Air will have a dedicated staff member that will assist them during every step of their trip. They will also have a dedicated crew member that will look after them on the flight and, on long flights such as this, the airline offers their Flying Mom service.
  • Turkish Airlines makes a good choice for a sustainable airline on this route. They continuously invest in modern and fuel-efficient aircraft, such as the Boeing 787 Dreamliner and Airbus A350. They have implemented renewable energy projects to reduce their reliance on fossil fuels. They have also participated in carbon offset programs, supporting projects that reduce or offset CO2 emissions.

Everything you need to know for your flight from Seattle to Seoul

Information on your arrival and departure airports