Question 1

What is the most punctual flight time for South Korea 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 2

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 South Korea 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 South Korea because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $898.

Question 3

What is the cheapest month to fly to Seattle?

Accepted Answer

In general, November is the cheapest month to fly from South Korea to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $556. If you don’t want to visit Seattle in November, then you should wait until December to fly from South Korea, when ticket prices are also cheap, with an average price of $569.

Question 4

Which airline has the best punctuality record on South Korea 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 19% of their flights experiencing any sort of delay.

Question 5

What airlines fly to Seattle?

Accepted Answer

Asiana Airlines, Korean Air and Alaska Airlines are the top three most popular airlines that fly to Seattle from South Korea according to our data. Asiana Airlines is the first choice among our users, with 41% 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 6

How many flights depart from South Korea to Seattle on average per day?

Accepted Answer

The number of flights available between South Korea and Seattle is 7 per day as of February 2026. The most frequent departure time is 8:00PM, with 75% of daily flights leaving in the evening.

Question 7

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 8

How many flights depart from South Korea to Seattle on average per week?

Accepted Answer

53 flights are operational weekly from South Korea to Seattle as of February 2026. The most popular departure day for this route is Mon, with 17% of flights per week taking off on this day.

Question 9

How long does it take to fly to Seattle?

Accepted Answer

Flight times vary depending on what airport in South Korea you fly out of and what airport in Seattle you fly into. For example, flying from Incheon to Seattle takes 10h on average. On the other hand, flying from Seoul to Seattle takes 14h 50m on average. Keep in mind that it’s always quicker to opt for a non-stop flight, so be sure to check momondo if there are any available for your route.

Question 10

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

Accepted Answer

Flying to Seattle from South Korea in the evening is the least expensive time of day to depart. momondo users have found prices as low as $748 when looking at flights departing in the evening. Flights to Seattle are more costly in the afternoon, with an average ticket price of $752. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.

Question 11

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

Accepted Answer

There are 4 cabin classes available to choose from on South Korea 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 12

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

Accepted Answer

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

Question 13

How often are flights from South Korea to Seattle delayed?

Accepted Answer

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

Question 14

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

Accepted Answer

You are more likely to see cheaper flights to Seattle from South Korea when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $700 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from South Korea for as low as $543 on momondo.

Question 15

Can stopping save me money on South Korea to Seattle flights?

Accepted Answer

You could potentially save up to 28% on your flight if you consider stops on a South Korea to Seattle flight.

Question 16

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

Accepted Answer

Prices for flights from South Korea to Seattle/Tacoma Intl Airport were last updated today.

Question 17

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

Accepted Answer

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

Question 18

How old do you have to be to fly from South Korea 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 South Korea to Seattle/Tacoma Intl Airport.

Question 19

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

Accepted Answer

The required travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Seattle/Tacoma Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best Price Found	$643
Fastest flight time	10h 00m
Direct flights	Every day
Airports in Seattle	1 airport

Airline	Rating	Free Cancellation	Price
Hawaiian Airlines	PriceFrom $351	Free Cancellation	Rating 7.8 2,831 reviews	Search Hawaiian Airlines flights
Asiana Airlines	PriceFrom $466	Free Cancellation	Rating 8.1 502 reviews	Search Asiana Airlines flights
Korean Air	PriceFrom $469	Free Cancellation	Rating 8.4 1,188 reviews	Search Korean Air flights
Alaska Airlines	PriceFrom $476	Free Cancellation	Rating 8.0 11,833 reviews	Search Alaska Airlines flights
United Airlines	PriceFrom $516	Free Cancellation	Rating 7.4 9,235 reviews	Search United Airlines flights
Delta	PriceFrom $606	Free Cancellation	Rating 7.9 8,138 reviews	Search Delta flights

Cheap flights from South Korea to Seattle from $373

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How to get the cheapest flight ticket from South Korea 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 South Korea to Seattle/Tacoma Intl flight route?

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

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

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

There are 4 cabin classes available to choose from on South Korea 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 South Korea to Seattle flights?

You could potentially save up to 28% on your flight if you consider stops on a South Korea to Seattle flight.

What airlines fly to Seattle?

How often are flights from South Korea to Seattle delayed?

Historically, on average around 30% of flights between South Korea 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 South Korea 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 South Korea 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 19% of their flights experiencing any sort of delay.

How many flights depart from South Korea to Seattle on average per day?

The number of flights available between South Korea and Seattle is 7 per day as of February 2026. The most frequent departure time is 8:00PM, with 75% of daily flights leaving in the evening.

How many flights depart from South Korea to Seattle on average per week?

53 flights are operational weekly from South Korea to Seattle as of February 2026. The most popular departure day for this route is Mon, with 17% of flights per week taking off on this day.

How long does it take to fly to Seattle?

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

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

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

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