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Cheap flights from Seattle to Incheon Intl Airport

SEA — ICN
16 Oct — 23 Oct1
1 adult
1 adult, Economy

Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Incheon Intl are usually found in February or September, booked 20 days in advance, depart on a Tuesday or Thursday and return on a Thursday

Cheap flight deals from Seattle to Incheon Intl

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Incheon Intl (ICN). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 16 September 2025.

Popular in

June

Cheapest in

February

Average price

C$ 1,350

Good round-trip deal

C$ 1,021 or less

Good one-way deal

C$ 495 or less
Highest demand for flights based on searches. 15% potential increase in price (C$ 419 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease (C$ 68 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Seattle/Tacoma Intl to Incheon Intl.
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Price to beat on a one-way flight from Seattle/Tacoma Intl to Incheon Intl.
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Best time to book a flight from Seattle to Incheon Intl

Have a flexible travel schedule? Discover the best time to fly to Incheon Intl from Seattle with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Seattle to Incheon Intl Airport

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

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Incheon Intl. Price data was last updated on 12 September 2025.

The best time to book flights from Seattle to Incheon Intl Airport is 20 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Seattle to Incheon Intl Airport?

Currently, September is the cheapest month in which you can book a flight from Seattle to Incheon Intl Airport (average of C$ 940). Flying from Seattle to Incheon Intl Airport in December is currently the most expensive (average of C$ 1,508). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from SEA to ICN?

Find hourly flight availability from Seattle to Incheon Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 16 September 2025.

One of the essential ways to save on airfare from Seattle to Incheon Intl Airport is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the afternoon could potentially save you up to 6% on airfare.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Incheon Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Seattle to Incheon Intl?

    Seattle/Tacoma Intl (SEA) is the airport you will fly out of if you book a flight from Seattle to Incheon Intl. You should not have trouble finding flights to Incheon Intl from Seattle/Tacoma Intl; the airport handles an average of 6 outbound flights to Incheon Intl per day. You should also have plenty of airline options to choose from since 0 airlines have flights from the Seattle airport to Incheon Intl. It is only a 18.4 km journey to Seattle/Tacoma Intl (SEA) from Seattle’s city centre.

  • How popular is this Seattle to Incheon Intl Airport flight route?

    This flight path from Seattle/Tacoma Intl to Incheon Intl was viewed by 98 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • What are the most reliable airlines from Seattle to Incheon Intl Airport?

    The top 3 most reliable airlines when flying from Seattle to Incheon Intl Airport are Delta (64%), Korean Air (61%) and Thai Airways (40%).

  • Can I find deals for flights from Seattle to Incheon Intl that include hotel bookings?

    Yes. In addition to deals on Seattle to Incheon Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Incheon Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Incheon Intl.

  • Can I find deals for business class flights from Seattle to Incheon Intl?

    Yes. Cheapflights offers flight deals from Seattle to Incheon Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Seattle to Incheon Intl Airport?

    Currently, September is the cheapest month in which you can book a flight from Seattle to Incheon Intl Airport (average of C$ 940). Flying from Seattle to Incheon Intl Airport in December is currently the most expensive (average of C$ 1,508). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Incheon Intl from Seattle.

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