Cheap flights from Seattle to Incheon Intl Airport
Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Incheon Intl are usually found in September or February, booked 20 days in advance, depart on a Thursday or Tuesday and return on a Friday
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 17 October 2025.
Popular in | June |
|---|---|
Cheapest in | September |
Average price | C$ 1,487 |
Good round-trip deal | C$ 849 or less |
Good one-way deal | C$ 544 or less |
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.
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?
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, August is the cheapest month in which you can book a flight from Seattle to Incheon Intl Airport (average of C$ 289). Flying from Seattle to Incheon Intl Airport in July is currently the most expensive (average of C$ 1,372). 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?
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 in the afternoon tend to be the most expensive. A flight in the morning could potentially save you up to 37% on airfare.
How often are flights from Seattle to Incheon delayed?
About 35% of weekly flights between Seattle and Incheon have experienced delays in the past year, with the average delay time being 151 minutes.
What is the most punctual flight time for Seattle to Incheon flights?
Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.
What day of the week experiences the fewest flight delays on this route?
Saturday tends to have the lowest number of delays on this route, whereas Sunday has historically faced a higher average of delays compared to other days of the week.
Which airline has the best punctuality record on Seattle to Incheon flights?
Over the past year, Delta has had the lowest number of delays on this route, with just 21% of flights being delayed.
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.
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Deals for Seattle to Incheon Intl flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other 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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