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

Hainan Airlines, Korean Air, and Asiana Airlines are the most popular carriers operating from Seattle/Tacoma Intl to Incheon Intl

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

Taipei City (TPE) was the most common stop: 80% of momondo users choosing 1-stop flights on this route connected there.

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

Vancouver (YVR) has the shortest average layover time for this route: 1h 46m.

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

56 flights are operational weekly from Seattle to Incheon Intl Airport as of November 2025. The most popular departure day for this route is Wed, with 18% of flights per week taking off on this day.

How often are flights from Seattle to Incheon delayed?

Historically, on average around 35% of flights between Seattle and Incheon have experienced a delay on any given week. The average delay length over the past 12 months has been 150 minutes.

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

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

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

8 flights are operational daily from Seattle to Incheon Intl Airport as of November 2025. The most popular departure time for this route is 11:00AM, with 47% of flights per day taking off in the afternoon.

What airlines fly to Incheon Intl Airport?

Korean Air, Asiana Airlines and Delta are the top three most popular airlines that fly to Incheon Intl Airport from Seattle 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 Incheon Intl Airport. Keep in mind that there are 10 different airlines that fly to Incheon Intl Airport on a routine basis, so you have a few additional options to choose from.

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

Flights connecting via Vancouver (YVR) have the shortest average one-way travel time: 14h 20m.

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

According to our data, Delta have had the least number of delays on this route over the last 12 months; with about 20% of their flights experiencing any sort of delay.

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

Flights via Istanbul (IST) offer the lowest average round-trip price of $1,129.

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

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

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

Prices for flights from Seattle/Tacoma Intl Airport to Incheon Intl Airport are refreshed on a daily basis.

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

As of November 2025, there are 10 operators available to choose from for flights from Seattle/Tacoma Intl Airport to Incheon Intl Airport.

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

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Seattle/Tacoma Intl Airport to Incheon Intl Airport.

What documentation or ID do you need to fly to Incheon Intl Airport?

The travel and health documents you'll need for your trip to Incheon Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Incheon Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$350 Cheap Flights from Seattle to Incheon Intl Airport in 2025/26

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Cheap round-trip flights

Enter your travel dates to find the best prices.

5:50 pm - 11:50 amSEA-ICN

49h 00m2 stops

6:55 pm - 4:36 pmICN-SEA

14h 41m1 stop

$698Multiple Airlines

Find Deal

dom., dic. 7 - mié., dic. 17

8:40 am - 12:30 pmSEA-ICN

34h 50m2 stops

9:20 pm - 8:38 pmICN-SEA

16h 18m1 stop

$700Multiple Airlines

Find Deal

mar., dic. 9 - mar., dic. 16

10:05 am - 9:00 pmSEA-ICN

41h 55m2 stops

6:55 pm - 10:06 pmICN-SEA

20h 11m1 stop

$726Multiple Airlines

Find Deal

jue., nov. 27 - lun., dic. 1

10:05 am - 9:00 pmSEA-ICN

41h 55m2 stops

6:55 pm - 10:06 pmICN-SEA

20h 11m1 stop

$728Multiple Airlines

Find Deal

jue., nov. 27 - lun., dic. 1

5:50 am - 4:00 pmSEA-ICN

17h 10m1 stop

5:55 pm - 10:46 pmICN-SEA

21h 51m1 stop

$732Air Canada

Find Deal

mar., dic. 2 - mié., dic. 10

10:05 am - 10:25 pmSEA-ICN

19h 20m2 stops

5:55 pm - 7:16 pmICN-SEA

18h 21m1 stop

$744Multiple Airlines

Find Deal

mar., dic. 2 - mié., dic. 10

11:10 pm - 9:35 pmSEA-ICN

29h 25m1 stop

9:20 pm - 6:48 pmICN-SEA

14h 28m1 stop

$750Multiple Airlines

Find Deal

mié., dic. 3 - dom., dic. 7

5:59 pm - 5:10 amSEA-ICN

18h 11m1 stop

9:20 pm - 10:22 amICN-SEA

30h 02m2 stops

$758Multiple Airlines

Find Deal

mié., dic. 3 - dom., dic. 7

12:10 am - 5:20 amSEA-ICN

12h 10mnonstop

9:20 pm - 10:22 amICN-SEA

30h 02m2 stops

$759Multiple Airlines

Find Deal

mar., dic. 2 - dom., dic. 7

8:00 pm - 5:10 pmSEA-ICN

28h 10m1 stop

6:55 pm - 7:16 pmICN-SEA

17h 21m1 stop

$762Air Canada

Find Deal

dom., nov. 23 - lun., dic. 8

Air Canada flights from Seattle to Incheon Intl Airport

Our best Air Canada deals on Seattle to Incheon Intl Airport flight tickets

Air Canada

Nov 21

SEA8:00 pmSeattle/Tacoma Intl

28h 10m

1 stop

ICN5:10 pmIncheon Intl

Dec 2

ICN6:55 pmIncheon Intl

17h 21m

1 stop

SEA7:16 pmSeattle/Tacoma Intl

$600

Find similar

Air Canada

Nov 21

SEA5:50 amSeattle/Tacoma Intl

18h 20m

1 stop

ICN5:10 pmIncheon Intl

Dec 2

ICN6:55 pmIncheon Intl

17h 21m

1 stop

SEA7:16 pmSeattle/Tacoma Intl

$635

Find similar

Air Canada

Dec 2

SEA5:50 amSeattle/Tacoma Intl

17h 10m

1 stop

ICN4:00 pmIncheon Intl

Dec 10

ICN5:55 pmIncheon Intl

21h 51m

1 stop

SEA10:46 pmSeattle/Tacoma Intl

$732

Find similar

Asiana Airlines flights from Seattle to Incheon Intl Airport

Our best Asiana Airlines deals on Seattle to Incheon Intl Airport flight tickets

Asiana Airlines

Dec 4

SEA12:10 amSeattle/Tacoma Intl

12h 10m

ICN5:20 amIncheon Intl

Dec 15

ICN9:00 pmIncheon Intl

9h 55m

SEA1:55 pmSeattle/Tacoma Intl

$812

Find similar

Asiana Airlines

Nov 18

SEA12:10 amSeattle/Tacoma Intl

12h 10m

ICN5:20 amIncheon Intl

Dec 1

ICN9:00 pmIncheon Intl

9h 55m

SEA1:55 pmSeattle/Tacoma Intl

$874

Find similar

momondo Fare Finder

Use the filters below to find and compare flights from Seattle to Incheon Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

dom. 12/7

5:50 pm-11:50 am

2 stops49h 00m

Incheon Intl

mié. 12/17

6:55 pm-4:36 pm

1 stop14h 41m

$698

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

mar. 12/9

8:40 am-12:30 pm

2 stops34h 50m

Incheon Intl

mar. 12/16

9:20 pm-8:38 pm

1 stop16h 18m

$700

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

jue. 11/27

10:05 am-9:00 pm

2 stops41h 55m

Incheon Intl

lun. 12/1

6:55 pm-10:06 pm

1 stop20h 11m

$726

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

jue. 11/27

10:05 am-9:00 pm

2 stops41h 55m

Incheon Intl

lun. 12/1

6:55 pm-10:06 pm

1 stop20h 11m

$728

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

mar. 12/2

5:50 am-4:00 pm

1 stop17h 10m

Incheon Intl

mié. 12/10

5:55 pm-10:46 pm

1 stop21h 51m

$732

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

mar. 12/2

10:05 am-10:25 pm

2 stops19h 20m

Incheon Intl

mié. 12/10

5:55 pm-7:16 pm

1 stop18h 21m

$744

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

mié. 12/3

11:10 pm-9:35 pm

1 stop29h 25m

Incheon Intl

dom. 12/7

9:20 pm-6:48 pm

1 stop14h 28m

$750

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

mié. 12/3

5:59 pm-5:10 am

1 stop18h 11m

Incheon Intl

dom. 12/7

9:20 pm-10:22 am

2 stops30h 02m

$758

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

mar. 12/2

12:10 am-5:20 am

Nonstop12h 10m

Incheon Intl

dom. 12/7

9:20 pm-10:22 am

2 stops30h 02m

$759

SeattleIncheon

SEA - ICN

SEAICN

Seattle/Tacoma Intl

dom. 11/23

8:00 pm-5:10 pm

1 stop28h 10m

Incheon Intl

lun. 12/8

6:55 pm-7:16 pm

1 stop17h 21m

$762

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Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Seattle to Incheon Intl Airport

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

Prices

Airlines

Delays

Layovers

Other information

What is the cheapest month to fly to Incheon Intl Airport?

The cheapest month to fly to Incheon Intl Airport from Seattle is in November. Flight prices, which tend to average around $906, are often lower during this time because this is during the off-season. If you are unable to visit Incheon Intl Airport during the month of November, then departing from Seattle during the month September is also very affordable. Most momondo users find prices during this month for around $963.

What is the cheapest day to depart on your flight to Incheon Intl Airport?

The cheapest day to depart from Seattle to Incheon Intl Airport is on a Monday when prices can be found for as low as $829. If your travel schedule is flexible, try to avoid departing on a Friday because tickets tend to average around $1,016. These prices are subject to change though, so be sure to set up a Price Alert for flights to Incheon Intl Airport.

What is the cheapest time of day to depart on your flight to Incheon Intl Airport?

In the evening is the cheapest time of day to fly from Seattle to Incheon Intl Airport when you can find flight prices for as low as $715. Flying to Incheon Intl Airport in the evening is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $1,401 on average. Flights to Incheon Intl Airport from Seattle in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

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

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

How far in advance should I book a flight to Incheon Intl Airport?

You are more likely to see cheaper flights to Incheon Intl Airport from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Incheon Intl Airport for around $1,114 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Incheon Intl Airport from Seattle for as low as $929 on momondo.

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

There are 3 cabin classes available to choose from on Seattle/Tacoma Intl to Incheon 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 Seattle to Incheon Intl Airport flights?

You could potentially save up to 1% on your flight if you consider stops on a Seattle to Incheon Intl Airport flight.

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

As of November 2025, prices for Seattle to Incheon Intl Airport flights are approximately 61% cheaper when compared to flights at the same time last year.

When to book flights from Seattle to Incheon Intl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to Incheon Intl Airport according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Seattle to Incheon Intl Airport (SEA to ICN) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Incheon Intl Airport

Best Price Found	$379
Fastest flight time	11h 45m
Direct flights	Every day

The best one-way flight to Incheon Intl Airport from Seattle in the past 72 hours is $379. The best round-trip flight deal from Seattle to Incheon Intl Airport found on momondo in the last 72 hours is $681.

The fastest flight from Seattle to Incheon Intl Airport takes 11h 45m

Direct flights go from Seattle to Incheon Intl Airport every day.

Search flight deals

How far is Seattle/Tacoma Intl to Incheon Intl by plane?
Seattle/Tacoma Intl and Incheon Intl are 5192.0 mi apart from one another. By plane, this route typically takes 11h 55m.
When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Incheon Intl Airport?
Prices for flights from Seattle/Tacoma Intl Airport to Incheon Intl Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Incheon Intl Airport?
As of November 2025, there are 10 operators available to choose from for flights from Seattle/Tacoma Intl Airport to Incheon Intl Airport.
How old do you have to be to fly from Seattle/Tacoma Intl Airport to Incheon Intl Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Seattle/Tacoma Intl Airport to Incheon Intl Airport.
What documentation or ID do you need to fly to Incheon Intl Airport?
The travel and health documents you'll need for your trip to Incheon Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Incheon Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Seattle to Incheon Intl Airport?
Based on momondo bookings for flights between Seattle and Incheon Intl Airport, the leading plane model is Boeing 787-9 Dreamliner, making up 30.11% of the total bookings. Other popular models include Boeing 787-10 Dreamliner with 19.66%, Airbus A350-900 with 15.38%, and Boeing 787 Dreamliner with 8.51%.
What is the most popular airline from Seattle to Incheon Intl Airport?
momondo data reveals that the most frequently booked airline on the route from Seattle to Incheon Intl Airport is Korean Air, representing 38% of all bookings. The subsequent popular airlines are Asiana Airlines at 31%, Delta at 11%, and Air Canada at 10%.

Best airlines flying from Seattle to Incheon Intl Airport

Compare and see reviews for airlines that fly from Seattle to Incheon Intl Airport with momondo

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $167	Free Cancellation	Rating 7.9 8,007 reviews	Search Delta flights
Alaska Airlines	PriceFrom $190	Free Cancellation	Rating 8.0 11,281 reviews	Search Alaska Airlines flights
United Airlines	PriceFrom $282	Free Cancellation	Rating 7.4 9,015 reviews	Search United Airlines flights
Hawaiian Airlines	PriceFrom $282	Free Cancellation	Rating 7.8 2,809 reviews	Search Hawaiian Airlines flights
Air Canada	PriceFrom $709	Free Cancellation	Rating 7.1 10,444 reviews	Search Air Canada flights
Asiana Airlines	PriceFrom $802	Free Cancellation	Rating 8.2 486 reviews	Search Asiana Airlines flights
Korean Air	PriceFrom $850	Free Cancellation	Rating 8.4 1,163 reviews	Search Korean Air flights
China Airlines	PriceFrom $886	Free Cancellation	Rating 8.3 778 reviews	Search China Airlines flights
EVA Air	PriceFrom $978	Free Cancellation	Rating 8.4 1,275 reviews	Search EVA Air flights
Turkish Airlines	PriceFrom $1,007	Free Cancellation	Rating 7.3 4,043 reviews	Search Turkish Airlines flights

Korean Air Flights From Seattle to Incheon Intl Airport
Korean Air flight deals from Seattle to Incheon Intl Airport start from $850 round-trip. Over the 14 Korean Air flights for this route in a normal week, average airfare is usually $1,171 round-trip - but some users have found much cheaper deals with momondo.
Asiana Airlines Flights From Seattle to Incheon Intl Airport
Another popular option for Seattle to Incheon Intl Airport flights is Asiana Airlines (8.2/10, 486 ratings). Asiana Airlines flies from Seattle to Incheon Intl Airport around 3 times per week, with deals starting from $802 round-trip and rising to an average price of around $1,080.

Suwon

Seongnam

Daejeon

Anyang

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Why should I use momondo to find a flight deal from Seattle to Seoul?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Seattle to Seoul for you.

Can I find flights from Seattle to Seoul with flexible booking policies on momondo?

Yes. All flights to Seoul from Seattle on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Seattle to Seoul?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Seoul from Seattle.

I’m not ready to book a flight from Seattle to Seoul right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Seattle to Seoul flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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Cheap flights from Seattle to Seoul from $350

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Seoul departing on 2/5. 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 Seattle to Incheon Intl Airport

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 Incheon Intl Airport?

What is the cheapest day to depart on your flight to Incheon Intl Airport?

What is the cheapest time of day to depart on your flight to Incheon Intl Airport?

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

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

How far in advance should I book a flight to Incheon Intl Airport?

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

There are 3 cabin classes available to choose from on Seattle/Tacoma Intl to Incheon 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 Seattle to Incheon Intl Airport flights?

You could potentially save up to 1% on your flight if you consider stops on a Seattle to Incheon Intl Airport flight.

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

As of November 2025, prices for Seattle to Incheon Intl Airport flights are approximately 61% cheaper when compared to flights at the same time last year.

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

Hainan Airlines, Korean Air, and Asiana Airlines are the most popular carriers operating from Seattle/Tacoma Intl to Incheon Intl

What airlines fly to Incheon Intl Airport?

How often are flights from Seattle to Incheon delayed?

Historically, on average around 35% of flights between Seattle and Incheon have experienced a delay on any given week. The average delay length over the past 12 months has been 150 minutes.

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

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

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

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

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

According to our data, Delta have had the least number of delays on this route over the last 12 months; with about 20% of their flights experiencing any sort of delay.

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

Taipei City (TPE) was the most common stop: 80% of momondo users choosing 1-stop flights on this route connected there.

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

Flights via Istanbul (IST) offer the lowest average round-trip price of $1,129.

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

Flights connecting via Vancouver (YVR) have the shortest average one-way travel time: 14h 20m.

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

Vancouver (YVR) has the shortest average layover time for this route: 1h 46m.

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

8 flights are operational daily from Seattle to Incheon Intl Airport as of November 2025. The most popular departure time for this route is 11:00AM, with 47% of flights per day taking off in the afternoon.

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

56 flights are operational weekly from Seattle to Incheon Intl Airport as of November 2025. The most popular departure day for this route is Wed, with 18% of flights per week taking off on this day.

When to book flights from Seattle to Incheon Intl Airport

Cheap Seattle to Incheon Intl Airport (SEA to ICN) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Incheon Intl Airport

Best Price Found

Fastest flight time

Direct flights

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

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

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

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

What documentation or ID do you need to fly to Incheon Intl Airport?

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

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

Best airlines flying from Seattle to Incheon Intl Airport

Compare and see reviews for airlines that fly from Seattle to Incheon Intl Airport with momondo

Korean Air Flights From Seattle to Incheon Intl Airport

Asiana Airlines Flights From Seattle to Incheon Intl Airport

Traveling to a place near Seoul?

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Seoul?

Can I find flights from Seattle to Seoul with flexible booking policies on momondo?