Cheap flights from Incheon Intl Airport to Seattle from $408
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Incheon Intl Airport to Seattle departing on 10/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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How to get the cheapest flight ticket from Incheon Intl Airport to Seattle
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to Seattle?
In general, May is the cheapest month to fly from Incheon Intl Airport to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $651. If you don’t want to visit Seattle in May, then you should wait until April to fly from Incheon Intl Airport, when ticket prices are also cheap, with an average price of $661.
What is the cheapest day to depart on your flight to Seattle?
On average, the least expensive day to fly to Seattle from Incheon Intl Airport is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $904. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Sunday is the most expensive day to depart from Incheon Intl Airport because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $1,191.
What is the cheapest time of day to depart on your flight to Seattle?
Flying to Seattle from Incheon Intl Airport in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $918 when looking at flights departing in the afternoon. Flights to Seattle are more costly in the evening, with an average ticket price of $1,102. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.
What is the cheapest Incheon Intl to Seattle/Tacoma Intl flight route?
Fly from Incheon Intl to Seattle/Tacoma Intl for the best Incheon Intl - Seattle/Tacoma Intl flight prices
How far in advance should I book a flight to Seattle?
You are more likely to see cheaper flights to Seattle from Incheon Intl Airport when booking 23 weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $853 when searching 23 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Incheon Intl Airport for as low as $751 on momondo.
What cabin class options are available on Incheon Intl to Seattle/Tacoma Intl flights?
There are 4 cabin classes available to choose from on Incheon Intl to Seattle/Tacoma Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
Can stopping save me money on Incheon Intl Airport to Seattle flights?
No. A direct flight is the cheapest option for a flight between Incheon Intl Airport to Seattle.
How have Incheon Intl Airport to Seattle flight prices changed over time?
As of June 2025, prices for Incheon Intl Airport to Seattle flights are approximately 17% cheaper when compared to flights at the same time last year.
What is the cheapest airline that flies from Incheon Intl to Seattle/Tacoma Intl?
Hainan Airlines, Air Canada, and Alaska Airlines are the most popular carriers operating from Incheon Intl to Seattle/Tacoma Intl
What airlines fly to Seattle?
Asiana Airlines, Korean Air and Delta are the top three most popular airlines that fly to Seattle from Incheon Intl Airport according to our data. Asiana Airlines is the first choice among our users, with 47% of people opting to fly with this airline when traveling to Seattle. Keep in mind that there are 5 different airlines that fly to Seattle on a routine basis, so you have a few additional options to choose from.
How many flights depart from Incheon Intl Airport to Seattle on average per day?
The number of flights available between Incheon Intl Airport and Seattle is 8 per day as of June 2025. The most frequent departure time is 6:00PM, with 74% of daily flights leaving in the evening.
How many flights depart from Incheon Intl Airport to Seattle on average per week?
As of June 2025, 57 flights take off from Incheon Intl Airport and land in Seattle each week. The most common flight departure day for this route is Thu, with 16% of weekly flights taking off on this day.
When to book flights from Incheon Intl Airport to Seattle
Cheap Incheon Intl Airport to Seattle (ICN to SEA) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Incheon Intl Airport to Seattle
How far is Incheon Intl to Seattle/Tacoma Intl by plane?
The distance between Incheon Intl and Seattle/Tacoma Intl is about 5192.0 mi. By plane, this route typically takes 9h 50m.
When did momondo last update prices for flights from Incheon Intl Airport to Seattle/Tacoma Intl Airport?
Prices for flights from Incheon Intl Airport to Seattle/Tacoma Intl Airport refresh daily.
How many operators does momondo search for flights from Incheon Intl Airport to Seattle/Tacoma Intl Airport?
As of June 2025, there are 5 operators available to choose from for flights from Incheon Intl Airport to Seattle/Tacoma Intl Airport.
How old do you have to be to fly from Incheon Intl Airport to Seattle/Tacoma Intl Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Incheon Intl Airport to Seattle/Tacoma Intl Airport.
What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?
The travel and health documents required for your trip to Seattle/Tacoma Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Seattle/Tacoma Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular plane model from Incheon Intl Airport to Seattle?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Incheon Intl Airport to Seattle is Boeing 787-10 Dreamliner (35.74% of total bookings). The next most popular plane models are Airbus A350-900 (22.14%), Boeing 777-200LR (16.25%), and Boeing 777-300ER (12.80%).
What is the most popular airline from Incheon Intl Airport to Seattle?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Incheon Intl Airport to Seattle is Asiana Airlines (46% of total bookings). The next most popular airlines are Korean Air (34%), Delta (14%), and Air Canada (4%).
Best airlines flying from Incheon Intl Airport to Seattle
Compare and see reviews for airlines that fly from Incheon Intl Airport to Seattle with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $474 | Free Cancellation | Rating 7.1 9,548 reviews | |||
| PriceFrom $515 | Free Cancellation | Rating 8.4 1,091 reviews | |||
| PriceFrom $516 | Free Cancellation | Rating 7.4 8,793 reviews | |||
| PriceFrom $549 | Free Cancellation | Rating 8.2 440 reviews | |||
| PriceFrom $646 | Free Cancellation | Rating 8.0 7,958 reviews |
Korean Air Flights From Incheon Intl Airport to Seattle
The lowest priced Korean Air flight from Incheon Intl Airport to Seattle from the last 72 hours was $515. Generally, Korean Air has 14 flights on this route every week with an average price of $880. Korean Air is rated 8.4/10 by our users.
Asiana Airlines Flights From Incheon Intl Airport to Seattle
Asiana Airlines is also a popular choice for this route. Asiana Airlines flight deals for Incheon Intl Airport to Seattle start from as low as $549 round-trip, depending on your selected dates, with average Asiana Airlines deals seen on momondo around $838. Asiana Airlines operates 8 flights to Seattle from Incheon Intl Airport in an average week. Users have rated it 8.2/10 across 440 reviews.
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Why should I use momondo to find a flight deal from Seoul to Seattle?
momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Seoul to Seattle. momondo saves you time and could save you money on your trip.
Can I find flights from Seoul to Seattle with flexible booking policies on momondo?
Yes. momondo allows you to filter the results for Seoul to Seattle flights to just show those with flexible booking policies.
How can momondo help me find flights from Seoul to Seattle?
momondo provides multiple filters to help you find the best flight to Seattle from Seoul. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.
I’m not ready to book a flight from Seoul to Seattle right now. Can momondo alert me if prices change?
Yes. momondo can track prices for Seoul to Seattle flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.