Find Cheap Flights from Seattle/Tacoma Intl to Seoul Incheon Intl Airport (SEA - ICN)

Search hundreds of travel sites at once for deals on flights to Seoul Incheon Intl Airport

Sat 11/18
Sat 11/25
Any month
Compare vs. KAYAK |

Good to Know

Low Season:
November
Best time to beat the crowds
3%
expected price decrease
High Season:
December
Most popular time to fly
1%
expected price increase
Average Price:
$1653
(avg. price over the last 2 weeks)
Good Deal:
$1594
or less (round trip)

When to Book Flights from Seattle/Tacoma Intl to Seoul Incheon Intl Airport

Average price per month
Flight prices as travel date approaches
-1 day
-2 days

Top tips for Finding a Cheap Flight

The cheapest flight from Seattle/Tacoma Intl to Seoul Incheon Intl Airport was found 71 days before departure, on average.
Book at least 3 weeks before departure in order to get a below-average price.
Morning departure is around 8% more expensive than an evening flight, on average*.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

FAQs for Booking Seattle/Tacoma Intl to Seoul Incheon Intl Airport Flights

How long does a flight from Seattle/Tacoma Intl to Seoul Incheon Intl Airport take?
An average nonstop flight takes 11h 47m, covering a distance of 5203 miles.
How many flights are there between Seattle/Tacoma Intl and Seoul Incheon Intl Airport?
There are 109 (nonstop) flights between Seattle/Tacoma Intl and Seoul Incheon Intl Airport per week, averaging 15 per day.
Which airlines provide the cheapest flights from Seattle/Tacoma Intl to Seoul Incheon Intl Airport?
In the past 3 days, the cheapest round-trip tickets were found on XiamenAir ($414), Air China ($612) and Multiple Airlines ($615).
Do I need a passport to fly between Seattle/Tacoma Intl and Seoul Incheon Intl Airport?
Yes.
Which airlines fly most frequently between Seattle/Tacoma Intl and Seoul Incheon Intl Airport?
Thai Airways (3 times daily), Delta (3 times daily), Asiana Airlines (2 times daily) are the most frequent flyers on this route.
What’s the cheapest day of the week to fly Seattle/Tacoma Intl to Seoul Incheon Intl Airport?
For Seattle/Tacoma Intl to Seoul Incheon Intl Airport, Friday is the cheapest day to fly on average and Saturday is the most expensive. Flying from Seoul Incheon Intl Airport back to Seattle/Tacoma Intl, the best deals are generally found on Sunday, with Saturday being the most expensive.

Book cheap flights from Seattle/Tacoma Intl to Seoul Incheon Intl Airport (round-trip)

Airports
Origin
Seattle
$414
only
$414
Destination
Seoul
$414
only
$414
Fri, Dec 1
SEA
ICN
37h 55m
Sat, Dec 23
ICN
SEA
54h 05m
Trip: 23 days
7.0GoodShow reviews
Overall 7.0 Good
Based on 213 reviews
Overall
7.1
Boarding
7.2
Comfort
7.2
Crew
7.5
Entertainment
6.6
Food
6.8
KHN
LHW
Excellent 10.0

Crew was excellent

JJN
TSN
Mediocre 2.0

Xiamen airlines are horrible I will never fly them again. Phillipines airline was excellent

SHA
XMN
Good 6.3

The flight was delayed due to air traffic control. Subsequently I missed my connecting flight -- Xiamen to Manila that evening and had to spend another night in China. Next flight out of Xiamen was 6pm, Nov 2. Xiamen ground staff was very helpful in booking me the option to fly China Southern to Guangzhou the night of Nov 1, stay for free in a hotel, and then take the 0835 morning China Southern flight from Guangzhou to Manila. It was difficult to identify the right people to speak with and get clear assistance and direction in both Xiamen and Guangzhou.

NRT
XMN
Okay 5.3

The offerings of beverages and the choices were good

Lack of communication by staff. Lack of entertainment on 14 hour flight. Was told not to use device while others were able to use.

CTU
FOC
Excellent 8.6

Gave me a free hotel when I was transferring in Fuzhou. All I had to pay was the taxi fare of 20kuai. The staff are extremely nice and the food from JFK to FOC was excellent. 2 full meals and a sandwich left me pretty full.

It is difficult to get in touch with the English Customer service.

Sun, Apr 8
SEA
ICN
36h 45m
Sat, Apr 14
ICN
SEA
21h 12m
Trip: 7 days
6.3GoodShow reviews
Overall 6.3 Good
Based on 3174 reviews
Overall
6.4
Boarding
6.6
Comfort
6.4
Crew
6.8
Entertainment
5.9
Food
5.9
EWR
PEK
Okay 5.6

flight was late, barely made my connection (which was also late).

LAX
PEK
Excellent 8.0

Comfortable

PEK
HKT
Okay 4.3

Crew and flight were professional and courteous.

Passengers from Beijing were rude, and consistently snorting and spitting throughout the entire flight. Not just one person but everyone around us. Very disgusting and nauseating listening to that for 6+hours. I had earbuds in the entire flight and could still hear the spitting...

PEK
YUL
Okay 4.0

Boarding process was really quick. In half an hour they boarded a complete flight.

There was a very rude person sitting behind me. He kept hitting my seat every time I reclined it. I brought up to the flight attendant but she had no intention of getting involved or helping out.

PEK
MNL
Mediocre 2.0

Air china needs to improved plane and food

Fri, Jan 12
SEA
ICN
44h 10m
Wed, Jan 17
ICN
SEA
40h 33m
Trip: 6 days
Overall 0.0 Poor
Based on 0 reviews
Wed, Mar 7
SEA
ICN
38h 15m
Sat, Mar 17
ICN
SEA
54h 05m
Trip: 10 days
7.0GoodShow reviews
Overall 7.0 Good
Based on 213 reviews
Overall
7.1
Boarding
7.2
Comfort
7.2
Crew
7.5
Entertainment
6.6
Food
6.8
JJN
TSN
Mediocre 2.0

Xiamen airlines are horrible I will never fly them again. Phillipines airline was excellent

SHA
XMN
Good 6.3

The flight was delayed due to air traffic control. Subsequently I missed my connecting flight -- Xiamen to Manila that evening and had to spend another night in China. Next flight out of Xiamen was 6pm, Nov 2. Xiamen ground staff was very helpful in booking me the option to fly China Southern to Guangzhou the night of Nov 1, stay for free in a hotel, and then take the 0835 morning China Southern flight from Guangzhou to Manila. It was difficult to identify the right people to speak with and get clear assistance and direction in both Xiamen and Guangzhou.

XMN
MNL
Mediocre 2.0

I missed the connecting flight and was rerouted on a Nov 2, 8:35am China Southern flight from Guangzhou to Manila

KHN
XMN
Excellent 10.0

Hostess

KHN
LHW
Excellent 10.0

Crew was excellent

Tue, May 1
SEA
ICN
11h 47m
Tue, May 8
ICN
SEA
10h 34m
Trip: 8 days
8.9ExcellentShow reviews
Overall 8.9 Excellent
Based on 4 reviews
Overall
8.0
Boarding
8.1
Comfort
7.7
Crew
8.4
Entertainment
7.5
Food
7.3
ATL
MCO
Excellent 10.0

Amazing experience thank you Delta

JFK
LAX
Excellent 9.3

Check in was easy through their app. Also very quick lines to drop off bags. Crew was very nice and respectful

Seat are a little bit too close together. But overall very comfortable

MOB
ATL
Good 6.0

Felt like I was sitting in my neighbors lap!

DTW
EWR
Excellent 8.0

Boarding was quick. Staff and crew were friendly. Everything went well despite the 30 min delay we had on the runway. They gave us snacks and we ended up still arriving on time.

ATL
BNA
Excellent 10.0

Compared to previous flight - this was so much better with upgrade to first class and extra space.

Fri, Dec 8
SEA
ICN
12h 00m
Mon, Dec 18
ICN
SEA
9h 50m
$1007
Trip: 11 days
8.0ExcellentShow reviews
Overall 8.0 Excellent
Based on 69 reviews
Boarding
8.4
Comfort
8.2
Crew
8.7
Entertainment
8.0
Food
8.2
SEA
ICN
Excellent 8.0

The quality of food.

Boarding was confusing, not enough announcements.

SEA
ICN
Mediocre 2.0

This flight was delayed because they sold their empty seats to other airlines and allowed for those people to make it. However, those who had connecting flights weren't able to make it and had to stay overnight in Korea. The next flight arrived 14 hours after the original scheduled flight

SEA
ICN
Excellent 10.0

Everything! Food, the seat, entertainment everything! I cannot ask for more. Plus points for the cabin crew of flight OZ271, they are the best! ❤️

None

SEA
ICN
Good 6.0

Stewards service

Always delayed

SEA
ICN
Mediocre 2.0

Though not particularly personable, Flight attendants were generally efficient at their tasks. i.e. No mistakes with pre-arranged special meal requests.

1) The ground staff in SEA never said a single 'please' or 'thank you', let alone any eye contact or even a mere 'you're welcome' in response to my expressions of thanks; I was made to thoroughly feel like a mere transaction. Clearly, Asiana severely needs basic manner- training for its staff. (this isn't the 1st time I've experienced rudeness from Asiana staff, but I just ignored it & chucked it up to their tired busy working days.) 2) We sat on the tarmac for an hour, exactly. We departed 1 hour later than scheduled, despite a short connection, which they, themselves, scheduled into this flight! ...

Mon, Feb 19
SEA
ICN
38h 15m
Sun, Feb 25
ICN
SEA
30h 05m
Trip: 7 days
7.0GoodShow reviews
Overall 7.0 Good
Based on 213 reviews
Overall
7.1
Boarding
7.2
Comfort
7.2
Crew
7.5
Entertainment
6.6
Food
6.8
SHA
XMN
Good 6.3

The flight was delayed due to air traffic control. Subsequently I missed my connecting flight -- Xiamen to Manila that evening and had to spend another night in China. Next flight out of Xiamen was 6pm, Nov 2. Xiamen ground staff was very helpful in booking me the option to fly China Southern to Guangzhou the night of Nov 1, stay for free in a hotel, and then take the 0835 morning China Southern flight from Guangzhou to Manila. It was difficult to identify the right people to speak with and get clear assistance and direction in both Xiamen and Guangzhou.

SZX
FOC
Excellent 8.4

Crew was friendly.

couldn't book through from Shenzhen yp Guilin. Had to check-in again at Fuzhou and go through security again.

XMN
MNL
Mediocre 2.0

I missed the connecting flight and was rerouted on a Nov 2, 8:35am China Southern flight from Guangzhou to Manila

XMN
KHN
Excellent 10.0

Hostess

KHN
XMN
Excellent 10.0

Hostess

Tue, Jan 9
SEA
ICN
23h 55m
Thu, Jan 18
ICN
SEA
41h 03m
Trip: 10 days
6.3GoodShow reviews
Overall 6.3 Good
Based on 3174 reviews
Overall
6.4
Boarding
6.6
Comfort
6.4
Crew
6.8
Entertainment
5.9
Food
5.9
PEK
SYD
Excellent 8.6

Comfort and service on the plane. Lounge in Beijing was wonderful.

What you have to go through in Beijing to transit from one international flight to another. Very disorganized. I will never change planes again in Beijing after this trip. Perhaps it will be better on the way back. Business class travelers should have a special lane.

JFK
PEK
Good 7.3

Crew efficient

No entertainment, console broken. Ran out of menu item of choice, but alternative was easily digestible.

PEK
MEL
Mediocre 2.0

This was like flying in the 90's. The seats were super small and uncomfortable my TV didn't work and they wouldn't let me use my phone (even on fly mode) and the Beijing international airport didn't have WiFi.

LAX
PEK
Mediocre 2.6

Better customer service

Air China staff need to better understand and learn how to talk to people.

EWR
PEK
Okay 5.6

flight was late, barely made my connection (which was also late).

Wed, Jan 31
SEA
ICN
60h 30m
Tue, Feb 6
ICN
SEA
27h 05m
Trip: 7 days
Overall 0.0 Poor
Based on 0 reviews
Thu, Nov 30
SEA
ICN
26h 10m
Mon, Dec 4
ICN
SEA
20h 01m
Trip: 5 days
6.3GoodShow reviews
Overall 6.3 Good
Based on 3174 reviews
Overall
6.4
Boarding
6.6
Comfort
6.4
Crew
6.8
Entertainment
5.9
Food
5.9
PEK
HKT
Okay 4.3

Crew and flight were professional and courteous.

Passengers from Beijing were rude, and consistently snorting and spitting throughout the entire flight. Not just one person but everyone around us. Very disgusting and nauseating listening to that for 6+hours. I had earbuds in the entire flight and could still hear the spitting...

JFK
PEK
Good 7.3

Crew efficient

No entertainment, console broken. Ran out of menu item of choice, but alternative was easily digestible.

PEK
MEL
Mediocre 2.0

This was like flying in the 90's. The seats were super small and uncomfortable my TV didn't work and they wouldn't let me use my phone (even on fly mode) and the Beijing international airport didn't have WiFi.

PEK
SYD
Excellent 8.6

Comfort and service on the plane. Lounge in Beijing was wonderful.

What you have to go through in Beijing to transit from one international flight to another. Very disorganized. I will never change planes again in Beijing after this trip. Perhaps it will be better on the way back. Business class travelers should have a special lane.

LAX
PEK
Excellent 8.0

Comfortable

Sat, Dec 16
SEA
ICN
28h 55m
Fri, Dec 29
ICN
SEA
13h 23m
$1400
Trip: 14 days
7.1GoodShow reviews
Overall 7.1 Good
Based on 19779 reviews
Overall
7.2
Boarding
7.3
Comfort
7.0
Crew
7.7
Entertainment
6.9
Food
6.4
YYZ
MCO
Good 6.3

I like the courteous crew members, very cordial & attentive.

The long wait on the aircraft after all passengers and crew were on board waiting for the oxygen tank to arrive.

NRT
YVR
Good 7.6

Compared to the flight going the other way, this one was much more comfortable. I didn't have someone's seat back in my face the whole time, and was able to enjoy games on my own device. I like that both USB and normal power options were available, so I was able to play games and charge my phone so I could use it after landing. The food was passable as well, which was surprising.

It's unavoidable when flying between multi-lingual locations, but having movies and stuff pause three times for each announcement gets annoying. The rolls served with the meals were very dry. These are small nits, and the flight was generally enjoyable.

FLL
YUL
Good 7.3

I had to change my return ticket early because of an emergency and Air Canada charged me $481.00 whenI only paid $371.00 fora round trip. How is that possible?

LAX
YYZ
Excellent 10.0

from LA to Toronto, between the seats was roomy

to LA, between the seats was very narrow

YYZ
YVR
Good 6.3

Food not included with insane flight costs

Fri, Apr 6
SEA
ICN
31h 40m
Sat, Apr 14
ICN
SEA
29h 00m
Trip: 9 days
Overall 0.0 Poor
Based on 0 reviews
Sat, Feb 10
SEA
ICN
45h 15m
Sun, Feb 25
ICN
SEA
49h 05m
Trip: 16 days
Overall 0.0 Poor
Based on 0 reviews
Sun, Mar 18
SEA
ICN
20h 15m
Thu, Mar 29
ICN
SEA
19h 44m
$1251
Trip: 12 days
Overall 0.0 Poor
Based on 0 reviews
Show more results
*
Prices are per person and are for e–tickets and include all taxes & fees in USD.

We attempt to get accurate prices, however, prices are not guaranteed.

Here's why:

We’re not the seller.
At KAYAK we don’t set the prices, so it’s not possible for us to guarantee what other companies are selling.

We compile tonnes of data for you
Our service lets you quickly and easily compare results from hundreds of travel sites at once. In this sense, KAYAK is a search engine and we can't guarantee prices we find.

Why aren’t prices accurate 100% of the time?
Prices on airline seats, hotel rooms and car rentals can change frequently. Several people may also be trying to buy the same travel option simultaneously. As a result, you may find, on occasion, that certain prices are no longer available.

If you have more questions or if you have a bad price to report to us,
please send us an and someone from our team will get back to you promptly.

^
The fares displayed include all taxes and fees for economy class travel and were found by the provider in the last 72 hours. Seats are limited and may not be available on all flights and days. Fares are subject to change and may not be available on all flights or dates of travel. Some carriers charge additional fees for extra checked bags. Please check the carriers' sites.