ICN - SEA

Find cheap flights from Incheon to Seattle

1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Seattle

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Incheon to Seattle, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Incheon to Seattle, as well as popular online travel agencies
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Flights Deals
Expert advice
Useful Info
Flights Deals

Cheap Flights from Incheon to Seattle (ICN-SEA)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Incheon to Seattle that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from Incheon to Seattle

Alaska Airlines Logo
ICN-SEA
10h 00mdirect
Alaska Airlines Logo
SEA-ICN
11h 55mdirect
Alaska Airlines
Find Deal
Thai Airways Logo
ICN-SEA
10h 10mdirect
Thai Airways Logo
SEA-ICN
12h 10mdirect
Thai Airways
Find Deal
Delta Logo
ICN-SEA
9h 50mdirect
Delta Logo
SEA-ICN
11h 55mdirect
Hawaiian Airlines Logo
ICN-SEA
9h 50mdirect
Hawaiian Airlines Logo
SEA-ICN
11h 55mdirect
Hawaiian Airlines
Find Deal
Korean Air Logo
ICN-SEA
9h 50mdirect
Korean Air Logo
SEA-ICN
11h 55mdirect
Korean Air
Find Deal
Asiana Airlines Logo
ICN-SEA
10h 10mdirect
Asiana Airlines Logo
SEA-ICN
12h 10mdirect
Asiana Airlines
Find Deal
United Airlines Logo
ICN-SEA
10h 10mdirect
United Airlines Logo
SEA-ICN
12h 10mdirect
United Airlines
Find Deal
Singapore Airlines Logo
ICN-SEA
10h 25mdirect
Singapore Airlines Logo
SEA-ICN
12h 10mdirect
Singapore Airlines
Find Deal
Expert advice

Expert advice for your flight from Incheon to Seattle

 
Snippets provided in this section are AI-generated based on a summarisation of KAYAK-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Airports
ICN

Security lines at ICN can be long, so arrive early to allow at least an hour for check-in, security, and passport control.

Read more about ICNby Robert Schrader
SEA

Use the Mobile Passport Control app at SEA for expedited customs processing if you don't have Global Entry.

Read more about SEAby Harriet Baskas
Our travel experts
Robert Schrader

Robert Schrader

Expert on ICN

Robert Schrader

Robert Schrader

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.

Read more
Harriet Baskas

Harriet Baskas

Expert on SEA

Harriet Baskas

Harriet Baskas

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, 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.

Read more
Useful Info

KAYAK's insights & trends for Incheon to Seattle flights

Get data-powered insights and trends into flights from Incheon to Seattle to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Incheon to Seattle?

The average price of all round-trip flights from Incheon Intl Airport to Seattle clicked on KAYAK for each day over the last 12 months.

If you are looking for a flight deal from Incheon to Seattle, look for departures on Mondays and avoid leaving on a Thursday, as it's usually the priciest day. When flying back from Seattle, Friday is the cheapest day to fly and Thursday is the most expensive.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Incheon Intl Airport to Seattle, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Incheon Intl Airport to Seattle is May, where tickets cost £479 (return) on average. On the other hand, the most expensive months are August and July, where the average cost of round-trip tickets is £1,045 and £872 respectively.

How far in advance should I book a flight from Incheon Intl Airport to Seattle?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Incheon Intl Airport to Seattle, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Incheon Intl Airport to Seattle, you should book around 2 weeks before departure. For the absolute cheapest price, our data suggests you should book 23 weeks before departure.


Good to know - Cheap tickets from Incheon to Seattle

Low seasonFebruary
High seasonSeptember
Best time to beat the crowds (20% less expensive on average)
Most popular time to fly (16% more expensive on average)

When to book flights from Incheon to Seattle

Are your dates flexible? Find out the best times to travel from Incheon to Seattle based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or returns with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Incheon to Seattle flights

  • Which airlines offer Wi-Fi service onboard planes from Incheon to Seattle?

    All the following airlines offer inflight Wi-Fi service on the Incheon to Seattle flight route: Delta, Asiana Airlines, Air Canada, Alaska Airlines, Singapore Airlines, Hawaiian Airlines, and American Airlines.

  • Which aircraft models fly most regularly from Incheon to Seattle?

    The Boeing 787-10 Dreamliner is the aircraft model that flies most regularly on the Incheon to Seattle flight route.

  • Which airline alliances offer flights from Incheon to Seattle?

    SkyTeam, and Star Alliance are the airline alliances operating flights between Incheon and Seattle, with Star Alliance being the most commonly used for this route.

  • On which days can I fly direct from Incheon to Seattle?

    There are direct flights from Incheon to Seattle on a daily basis.

  • How does KAYAK find such low prices on flights from Incheon to Seattle?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Incheon to Seattle.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Incheon to Seattle?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from Incheon is likely to change within 7 days, so travellers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Incheon to Seattle?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to Seattle with an airline and back to Incheon with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Incheon to Seattle?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Seattle from Incheon up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Incheon Intl Airport to Seattle

  • Looking for a cheap flight from Seattle to Incheon? 25% of our users found flights on this route for Seattle or less round-trip.

Prefer to fly direct from Incheon to Seattle?

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

Direct departures

Incheon Intl to Seattle/Tacoma Intl

Monday

Asiana Airlines, Delta, Korean Air, +3 more

Asiana Airlines, Delta, +4 more

Tuesday

Asiana Airlines, Delta, Korean Air, +3 more

Asiana Airlines, Delta, +4 more

Wednesday

Asiana Airlines, Delta, Korean Air, +3 more

Asiana Airlines, Delta, +4 more

Thursday

Asiana Airlines, Delta, Korean Air, +3 more

Asiana Airlines, Delta, +4 more

Friday

Asiana Airlines, Delta, Korean Air, +3 more

Asiana Airlines, Delta, +4 more

Saturday

Asiana Airlines, Delta, Korean Air, +3 more

Asiana Airlines, Delta, +4 more

Sunday

Asiana Airlines, Delta, Korean Air, +3 more

Asiana Airlines, Delta, +4 more

See more direct flights

Direct returns

Seattle/Tacoma Intl to Incheon Intl

Monday

Asiana Airlines, Delta, Korean Air, +3 more

Asiana Airlines, Delta, +4 more

Tuesday

Asiana Airlines, Delta, Korean Air, +3 more

Asiana Airlines, Delta, +4 more

Wednesday

Asiana Airlines, Delta, Korean Air, +3 more

Asiana Airlines, Delta, +4 more

Thursday

Asiana Airlines, Delta, Korean Air, +3 more

Asiana Airlines, Delta, +4 more

Friday

Asiana Airlines, Delta, Korean Air, +3 more

Asiana Airlines, Delta, +4 more

Saturday

Asiana Airlines, Delta, Korean Air, +3 more

Asiana Airlines, Delta, +4 more

Sunday

Asiana Airlines, Delta, Korean Air, +3 more

Asiana Airlines, Delta, +4 more

See more direct flights
See more direct flights

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

Information on your arrival and departure airports

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