Q: What is the typical price of a round-trip flight between Incheon Intl Airport and Seattle?

Prices are currently low for flights on this route. Typical prices usually range from $939 to $1,433. The lowest price recently found on this route was $473.

Question 1

What is the cheapest time of day to depart on your flight to Seattle?

Accepted Answer

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 $873 when looking at flights departing in the afternoon. Flights to Seattle are more costly in the evening, with an average ticket price of $1,022. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

Question 2

What is the cheapest airline that flies from Incheon Intl to Seattle/Tacoma Intl?

Accepted Answer

WestJet and Hainan Airlines are the most popular carriers operating from Incheon Intl to Seattle/Tacoma Intl

Question 3

Which layover airport has the shortest travel time from Incheon Intl Airport to Seattle?

Accepted Answer

Flights connecting via San Francisco (SFO) have the shortest average one-way travel time: 4h 36m.

Question 4

What is the typical price of a round-trip flight between Incheon Intl Airport and Seattle?

Accepted Answer

Prices are currently low for flights on this route.Typical prices usually range from $939 to $1,433.
The lowest price recently found on this route was $473.

Question 5

What is the cheapest Incheon Intl to Seattle/Tacoma Intl flight route?

Accepted Answer

Fly from Incheon Intl to Seattle/Tacoma Intl for the best Incheon Intl - Seattle/Tacoma Intl flight prices

Question 6

What is the cheapest day to depart on your flight to Seattle?

Accepted Answer

On average, the least expensive day to fly to Seattle from Incheon Intl Airport is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as $861. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Saturday 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 $1,056.

Question 7

How many flights depart from Incheon Intl Airport to Seattle on average per day?

Accepted Answer

The number of flights available between Incheon Intl Airport and Seattle is 7 per day as of July 2025. The most frequent departure time is 6:00PM, with 74% of daily flights leaving in the evening.

Question 8

How have Incheon Intl Airport to Seattle flight prices changed over time?

Accepted Answer

As of July 2025, prices for Incheon Intl Airport to Seattle flights are approximately 43% cheaper when compared to flights at the same time last year.

Question 9

How far in advance should I book a flight to Seattle?

Accepted Answer

You are more likely to see cheaper flights to Seattle from Incheon Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $815 when searching 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 $696 on momondo.

Question 10

What cabin class options are available on Incheon Intl to Seattle/Tacoma Intl flights?

Accepted Answer

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.

Question 11

Which layover airport offers the lowest fares from Incheon Intl Airport to Seattle?

Accepted Answer

Flights via Taipei City (TPE) offer the lowest average round-trip price of $963.

Question 12

What airlines fly to Seattle?

Accepted Answer

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 45% 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.

Question 13

Which airport is the most popular layover for flights between Incheon Intl Airport and Seattle?

Accepted Answer

San Francisco (SFO) was the most common stop: 88% of momondo users choosing 1-stop flights on this route connected there.

Question 14

Which layover airport has the shortest connection time from Incheon Intl Airport to Seattle?

Accepted Answer

Taipei City (TPE) has the shortest average layover time for this route: 1h 55m.

Question 15

What is the cheapest month to fly to Seattle?

Accepted Answer

In general, June 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 $646. If you don’t want to visit Seattle in June, then you should wait until May to fly from Incheon Intl Airport, when ticket prices are also cheap, with an average price of $651.

Question 16

How many flights depart from Incheon Intl Airport to Seattle on average per week?

Accepted Answer

As of July 2025, 53 flights take off from Incheon Intl Airport and land in Seattle each week. The most common flight departure day for this route is Mon, with 15% of weekly flights taking off on this day.

Question 17

When did momondo last update prices for flights from Incheon Intl Airport to Seattle/Tacoma Intl Airport?

Accepted Answer

Prices for flights from Incheon Intl Airport to Seattle/Tacoma Intl Airport refresh daily.

Question 18

How many operators does momondo search for flights from Incheon Intl Airport to Seattle/Tacoma Intl Airport?

Accepted Answer

As of July 2025, there are 5 operators available to choose from for flights from Incheon Intl Airport to Seattle/Tacoma Intl Airport.

Question 19

How old do you have to be to fly from Incheon Intl Airport to Seattle/Tacoma Intl Airport?

Accepted Answer

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.

Question 20

What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

Accepted Answer

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.

Best Price Found	$376
Fastest flight time	9h 55m
Direct flights	Every day
Airports in Seattle	1 airport

Airline	Rating	Free Cancellation	Price
Air Canada	PriceFrom $474	Free Cancellation	Rating 7.1 9,787 reviews	Search Air Canada flights
United Airlines	PriceFrom $516	Free Cancellation	Rating 7.4 8,880 reviews	Search United Airlines flights
Korean Air	PriceFrom $517	Free Cancellation	Rating 8.4 1,114 reviews	Search Korean Air flights
Asiana Airlines	PriceFrom $541	Free Cancellation	Rating 8.2 463 reviews	Search Asiana Airlines flights
Delta	PriceFrom $638	Free Cancellation	Rating 8.0 7,967 reviews	Search Delta flights

Cheap flights from Incheon Intl Airport to Seattle from $376

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 8/31. 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 typical price of a round-trip flight between Incheon Intl Airport and Seattle?

What is the cheapest month to fly to Seattle?

What is the cheapest day to depart on your flight to Seattle?

What is the cheapest time of day to depart on your flight to Seattle?

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?

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.

How have Incheon Intl Airport to Seattle flight prices changed over time?

As of July 2025, prices for Incheon Intl Airport to Seattle flights are approximately 43% 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?

WestJet and Hainan Airlines are the most popular carriers operating from Incheon Intl to Seattle/Tacoma Intl

What airlines fly to Seattle?

Which airport is the most popular layover for flights between Incheon Intl Airport and Seattle?

San Francisco (SFO) was the most common stop: 88% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport offers the lowest fares from Incheon Intl Airport to Seattle?

Flights via Taipei City (TPE) offer the lowest average round-trip price of $963.

Which layover airport has the shortest travel time from Incheon Intl Airport to Seattle?

Flights connecting via San Francisco (SFO) have the shortest average one-way travel time: 4h 36m.

Which layover airport has the shortest connection time from Incheon Intl Airport to Seattle?

Taipei City (TPE) has the shortest average layover time for this route: 1h 55m.

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 7 per day as of July 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 July 2025, 53 flights take off from Incheon Intl Airport and land in Seattle each week. The most common flight departure day for this route is Mon, with 15% 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

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How far is Incheon Intl to Seattle/Tacoma Intl by plane?

When did momondo last update prices for flights from Incheon Intl Airport to Seattle/Tacoma Intl Airport?

How many operators does momondo search 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?

What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

What is the most popular plane model from Incheon Intl Airport to Seattle?

What is the most popular airline from Incheon Intl Airport to Seattle?

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