Question 1

How often are flights from Incheon to Seattle delayed?

Accepted Answer

Historically, on average around 30% of flights between Incheon and Seattle have experienced a delay on any given week. The average delay length over the past 12 months has been 160 minutes.

Question 2

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 3

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 $699 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 $541 on momondo.

Question 4

What is the most punctual flight time for Incheon to Seattle flights?

Accepted Answer

Generally, flights departing at night tend to experience fewer delays. Flights in the morning have, in the past, seen delays more frequently in comparison.

Question 5

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 6

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

Accepted Answer

As of January 2026, 54 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 17% of weekly flights taking off on this day.

Question 7

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

Accepted Answer

As of January 2026, prices for Incheon Intl Airport to Seattle flights are approximately 5% more expensive when compared to flights at the same time last year.

Question 8

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

Accepted Answer

Flights connecting via Taipei City (TPE) have the shortest average one-way travel time: 15h 10m.

Question 9

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 10

What airlines fly to Seattle?

Accepted Answer

Korean Air, Asiana Airlines and Alaska Airlines are the top three most popular airlines that fly to Seattle from Incheon Intl Airport according to our data. Korean Air is the first choice among our users, with 42% of people opting to fly with this airline when traveling to Seattle. Keep in mind that there are 6 different airlines that fly to Seattle on a routine basis, so you have a few additional options to choose from.

Question 11

Which airline has the best punctuality record on Incheon to Seattle flights?

Accepted Answer

According to our data, Hawaiian Airlines have had the least number of delays on this route over the last 12 months; with about 18% of their flights experiencing any sort of delay.

Question 12

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 evening is the least expensive time of day to depart. momondo users have found prices as low as $753 when looking at flights departing in the evening. Flights to Seattle are more costly in the afternoon, with an average ticket price of $755. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.

Question 13

What is the cheapest month to fly to Seattle?

Accepted Answer

In general, November 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 $531. If you don’t want to visit Seattle in November, then you should wait until December to fly from Incheon Intl Airport, when ticket prices are also cheap, with an average price of $597.

Question 14

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 Thursday. momondo users have found tickets for Thursday departures for as low as $719. 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 $893.

Question 15

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 January 2026. The most frequent departure time is 8:00PM, with 73% of daily flights leaving in the evening.

Question 16

Can stopping save me money on Incheon Intl Airport to Seattle flights?

Accepted Answer

You could potentially save up to 23% on your flight if you consider stops on a Incheon Intl Airport to Seattle flight.

Question 17

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 18

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 19

What day of the week experiences the fewest flight delays on this route?

Accepted Answer

Thursday is statistically the day of the week which experiences the fewest number of delays on this flight route. Friday has historically seen more delays on average compared to the rest of the week.

Question 20

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 21

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

Accepted Answer

As of January 2026, there are 6 operators available to choose from for flights from Incheon Intl Airport to Seattle/Tacoma Intl Airport.

Question 22

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 23

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	$579
Fastest flight time	9h 50m
Direct flights	Every day
Airports in Seattle	1 airport

Airline	Rating	Free Cancellation	Price
Hawaiian Airlines	PriceFrom $351	Free Cancellation	Rating 7.8 2,827 reviews	Search Hawaiian Airlines flights
Asiana Airlines	PriceFrom $466	Free Cancellation	Rating 8.1 502 reviews	Search Asiana Airlines flights
Korean Air	PriceFrom $470	Free Cancellation	Rating 8.4 1,187 reviews	Search Korean Air flights
Air Canada	PriceFrom $472	Free Cancellation	Rating 7.1 10,622 reviews	Search Air Canada flights
Alaska Airlines	PriceFrom $476	Free Cancellation	Rating 8.0 11,719 reviews	Search Alaska Airlines flights
Delta	PriceFrom $606	Free Cancellation	Rating 7.9 8,049 reviews	Search Delta flights

Cheap flights from Incheon Intl Airport to Seattle from $291

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 3/8. 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

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.

Can stopping save me money on Incheon Intl Airport to Seattle flights?

You could potentially save up to 23% on your flight if you consider stops on a Incheon Intl Airport to Seattle flight.

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

As of January 2026, prices for Incheon Intl Airport to Seattle flights are approximately 5% more expensive when compared to flights at the same time last year.

What airlines fly to Seattle?

How often are flights from Incheon to Seattle delayed?

Historically, on average around 30% of flights between Incheon and Seattle have experienced a delay on any given week. The average delay length over the past 12 months has been 160 minutes.

What is the most punctual flight time for Incheon to Seattle flights?

Generally, flights departing at night tend to experience fewer delays. Flights in the morning have, in the past, seen delays more frequently in comparison.

What day of the week experiences the fewest flight delays on this route?

Thursday is statistically the day of the week which experiences the fewest number of delays on this flight route. Friday has historically seen more delays on average compared to the rest of the week.

Which airline has the best punctuality record on Incheon to Seattle flights?

According to our data, Hawaiian Airlines have had the least number of delays on this route over the last 12 months; with about 18% of their flights experiencing any sort of delay.

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 Taipei City (TPE) have the shortest average one-way travel time: 15h 10m.

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 January 2026. The most frequent departure time is 8:00PM, with 73% of daily flights leaving in the evening.

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

As of January 2026, 54 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 17% 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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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?

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

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