Cheap flights from Seattle to Incheon Intl Airport
SEA — ICN
6 Jan — 13 Jan1
Round-trip
1 adult
Economy
Round-trip
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Incheon Intl are usually found in April or August, booked 38 days in advance, depart on a Tuesday or Sunday and return on a Monday
Find 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 7 December 2025.
Popular in
December
Cheapest in
April
Average price
C$ 2,155
Good round-trip deal
C$ 906 or less
Good one-way deal
C$ 527 or less
Highest demand for flights based on searches. 15% potential increase in price (C$ 339 potential increase over avg. RT price).
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
Prices
Airlines
Delays
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 5 December 2025.
The best time to book flights from Seattle to Incheon Intl Airport is 38 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, April is the cheapest month in which you can book a flight from Seattle to Incheon Intl Airport (average of C$ 463). Flying from Seattle to Incheon Intl Airport in December is currently the most expensive (average of C$ 1,112). 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 7 December 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 in the afternoon tend to be the most expensive. A flight in the evening could potentially save you up to 42% on airfare.
Weekly flight availability from Seattle to Incheon Intl Airport
Explore weekly flight availability from Seattle to Incheon Intl. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 7 December 2025.
The most flights from SEA to ICN are scheduled on a Wednesday (10 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (6 on average).
How often are flights from Seattle to Incheon delayed?
About 33% of weekly flights between Seattle and Incheon have experienced delays in the past year, with the average delay time being 185 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 13% 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.
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 8 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 (73%), Korean Air (67%) and Alaska Airlines (55%).
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, April is the cheapest month in which you can book a flight from Seattle to Incheon Intl Airport (average of C$ 463). Flying from Seattle to Incheon Intl Airport in December is currently the most expensive (average of C$ 1,112). 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.
Explore flights to Incheon Intl departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 7 December 2025.
Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.
How does Cheapflights help users find flights from Seattle to Incheon Intl?
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.
Why should you use Cheapflights to find cheap flight tickets from Seattle to Incheon Intl?
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.
Can Cheapflights find flights from Seattle to Incheon Intl with no change fees?
Yes! Cheapflights helps users easily find flights from Seattle to Incheon Intl with no change fees.
Can Cheapflights notify me if prices for flights from Seattle to Incheon Intl become cheaper?
Of course! You can now track prices for flights from Seattle to Incheon Intl and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.
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