$487+ Cheap flights from Incheon Intl (ICN) to Seattle (SEA)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/4. Fares are subject to change and may not be available on all flights or dates of travel.
ICN — SEA
Oct 9 — Oct 161
Round-trip
1 adult, Economy
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Find cheap flights from Incheon Intl to Seattle with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheapflights Tip: The best prices from Incheon Intl to Seattle/Tacoma Intl are usually found in November or December, booked 25 days in advance, depart on a Monday or Sunday and return on a Wednesday
Cheap flight deals from Incheon Intl to Seattle
Cheapest
Best
Last-minute
One-way
Cheapest flights from Incheon Intl to SeattleExplore the most affordable flight options available from Incheon Intl to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 9, 2026.
Explore the most affordable flight options available from Incheon Intl to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 9, 2026.
This lastminute.com deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/108:30 pm -
1 stop39h 35m
Wed 9/2311:10 pm -
1 stop28h 05m
Deal found 9/7![Philippine Airlines logo]()
$856
This Cheapflightsfares deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/87:20 am -
1 stop28h 45m
Thu 10/1511:10 pm -
1 stop28h 05m
Deal found 9/8![Philippine Airlines logo]()
$873
This Cheapflightsfares deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/67:20 am -
1 stop28h 45m
Tue 10/1311:10 pm -
1 stop28h 05m
Deal found 9/7![Philippine Airlines logo]()
$874
This Gotogate deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/67:20 am -
1 stop28h 45m
Fri 10/911:10 pm -
1 stop38h 50m
Deal found 9/8![Philippine Airlines logo]()
$885
This Air Canada deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/195:45 pm -
1 stop12h 37m
Fri 11/138:40 am -
1 stop15h 30m
Deal found 9/5![Air Canada logo]()
$888
This OneTravel deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure OneTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/85:45 pm -
1 stop21h 02m
Mon 10/127:15 pm -
1 stop28h 50m
Deal found 9/6![Air Canada logo]()
$892
This FlightHub deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/27:20 am -
1 stop28h 45m
Fri 10/911:10 pm -
1 stop38h 50m
Deal found 9/5![Philippine Airlines logo]()
$895
This Philippine Airlines deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Philippine Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/227:30 am -
1 stop28h 00m
Mon 2/159:30 pm -
1 stop28h 40m
Deal found 9/6![Philippine Airlines logo]()
$896
This Gotogate deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/78:30 pm -
1 stop39h 35m
Fri 10/211:10 pm -
1 stop38h 50m
Deal found 9/6![Philippine Airlines logo]()
$898
Best flights from Incheon Intl to SeattleDiscover carefully curated flight deals from Incheon Intl to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 9, 2026.
Discover carefully curated flight deals from Incheon Intl to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 9, 2026.
This Philippine Airlines deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Philippine Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/257:30 am -
1 stop28h 00m
Sun 11/19:30 pm -
1 stop21h 30m
Deal found 9/9![Philippine Airlines logo]()
$904
This United Airlines deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1812:45 pm -
2 stops20h 27m
Thu 11/265:05 am -
2 stops31h 35m
Deal found 9/4![United Airlines logo]()
$969
This Hanatour deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Hanatour is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/186:45 pm -
Nonstop10h 06m
Thu 11/2612:30 pm -
Nonstop12h 15m
Deal found 9/4![Korean Air logo]()
$992
This Delta deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/184:10 pm -
Nonstop9h 50m
Thu 11/267:20 am -
1 stop17h 20m
Deal found 9/4![Delta logo]()
$1,016
This United Airlines deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/2511:30 am -
2 stops23h 59m
Sat 9/263:18 pm -
1 stop31h 42m
Deal found 9/7![United Airlines logo]()
$978
This Delta deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/234:40 pm -
Nonstop10h 00m
Sun 10/47:15 am -
1 stop18h 05m
Deal found 9/8![Delta logo]()
$1,027
This Philippine Airlines deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Philippine Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 1/178:30 pm -
1 stop39h 00m
Fri 1/299:30 pm -
1 stop28h 40m
Deal found 9/6![Philippine Airlines logo]()
$1,065
This United Airlines deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/2511:30 am -
2 stops26h 29m
Sun 9/276:30 am -
2 stops29h 50m
Deal found 9/8![United Airlines logo]()
$980
This Delta deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/274:40 pm -
Nonstop10h 00m
Mon 9/289:30 pm -
1 stop27h 50m
Deal found 9/8![Delta logo]()
$1,089
This United Airlines deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/2711:30 am -
2 stops20h 20m
Mon 9/286:30 am -
2 stops29h 50m
Deal found 9/8![United Airlines logo]()
$1,036
This United Airlines deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/214:50 pm -
2 stops18h 39m
Sun 10/253:35 pm -
1 stop21h 05m
Deal found 9/6![United Airlines logo]()
$1,164
Last-minute flights from Incheon Intl to SeattleDiscover last-minute flight deals from Incheon Intl to Seattle. Data last updated September 9, 2026 and is based on user searches.
Discover last-minute flight deals from Incheon Intl to Seattle. Data last updated September 9, 2026 and is based on user searches.
This lastminute.com deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/108:30 pm -
1 stop39h 35m
Wed 9/2311:10 pm -
1 stop28h 05m
Deal found 9/7![Philippine Airlines logo]()
$856
This FlightHub deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/27:20 am -
1 stop28h 45m
Fri 10/911:10 pm -
1 stop38h 50m
Deal found 9/5![Philippine Airlines logo]()
$895
This YBTour deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure YBTour is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/47:20 am -
1 stop28h 45m
Tue 10/1311:10 pm -
1 stop28h 05m
Deal found 9/8![Philippine Airlines logo]()
$899
This Cheapflightsfares deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/67:20 am -
1 stop28h 45m
Tue 10/1311:10 pm -
1 stop28h 05m
Deal found 9/7![Philippine Airlines logo]()
$874
This Gotogate deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/67:20 am -
1 stop28h 45m
Fri 10/911:10 pm -
1 stop38h 50m
Deal found 9/8![Philippine Airlines logo]()
$885
This Cheapflightsfares deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/87:20 am -
1 stop28h 45m
Thu 10/1511:10 pm -
1 stop28h 05m
Deal found 9/8![Philippine Airlines logo]()
$873
This OneTravel deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure OneTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/85:45 pm -
1 stop21h 02m
Mon 10/127:15 pm -
1 stop28h 50m
Deal found 9/6![Air Canada logo]()
$892
This Gotogate deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/148:30 pm -
1 stop39h 35m
Tue 10/2011:10 pm -
1 stop28h 05m
Deal found 9/6![Philippine Airlines logo]()
$900
This Air Canada deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/195:45 pm -
1 stop12h 37m
Fri 11/138:40 am -
1 stop15h 30m
Deal found 9/5![Air Canada logo]()
$888
One-way flights from Incheon Intl to SeattleSearch for one-way flight options from Incheon Intl to Seattle. Find affordable one-way fares based on user searches. Data last updated September 9, 2026.
Search for one-way flight options from Incheon Intl to Seattle. Find affordable one-way fares based on user searches. Data last updated September 9, 2026.
This FlightHub deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/49:40 pm -
2 stops27h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![Hainan Airlines logo]()
$487
This FlightHub deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/169:40 pm -
2 stops27h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/7![Hainan Airlines logo]()
$489
This Kiwi.com deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/147:15 pm -
1 stop15h 18m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/7![Multiple Airlines logo]()
$494
This Super.com deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/119:40 pm -
1 stop27h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Hainan Airlines logo]()
$498
This Kiwi.com deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/77:45 pm -
1 stop14h 36m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Multiple Airlines logo]()
$501
This Kiwi.com deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/31:20 pm -
2 stops46h 34m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![Multiple Airlines logo]()
$502
This Kiwi.com deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/67:45 pm -
1 stop32h 07m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/7![Multiple Airlines logo]()
$503
This Kiwi.com deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/99:40 pm -
2 stops27h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Hainan Airlines logo]()
$505
This Kiwi.com deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/57:15 pm -
2 stops39h 21m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Multiple Airlines logo]()
$506
Find flight deals from Incheon Intl to Seattle
Discover tips and strategies to find the most affordable flight options for your journey from Incheon Intl (ICN) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 9, 2026.
Most accurate provider | BusinessClass 3 stars |
|---|---|
Most trusted provider | BusinessClass 3 stars |
Round-trip from | $872 (Cheapflightsfares) |
One-way from | $487 (FlightHub) |
Popular in | June |
Cheapest in | November |
Average price | $684 |
Good round-trip deal | $869 or less |
Good one-way deal | $662 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Incheon Intl to Seattle that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated September 9, 2026.
Use the filters below to find and compare flights from Incheon Intl Airport to Seattle that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
IncheonSeattle
ICN Incheon Intl - SEA Seattle/Tacoma Intl
ICNSEA
Incheon Intl
Wed 3/3
7:30 am-6:30 pm
1 stop28h 00m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$510
IncheonSeattle
ICN Incheon Intl - SEA Seattle/Tacoma Intl
ICNSEA
Incheon Intl
Sat 12/5
8:30 pm-6:30 pm
1 stop39h 00m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$510
IncheonSeattle
ICN Incheon Intl - SEA Seattle/Tacoma Intl
ICNSEA
Incheon Intl
Mon 12/7
7:30 am-6:30 pm
1 stop28h 00m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$510
IncheonSeattle
ICN Incheon Intl - SEA Seattle/Tacoma Intl
ICNSEA
Incheon Intl
Sun 9/27
7:20 am-8:05 pm
1 stop28h 45m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$510
IncheonSeattle
ICN Incheon Intl - SEA Seattle/Tacoma Intl
ICNSEA
Incheon Intl
Mon 9/14
8:30 pm-8:05 pm
1 stop39h 35m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$546
IncheonSeattle
ICN Incheon Intl - SEA Seattle/Tacoma Intl
ICNSEA
Incheon Intl
Sat 12/19
8:30 pm-6:30 pm
1 stop39h 00m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$673
IncheonSeattle
ICN Incheon Intl - SEA Seattle/Tacoma Intl
ICNSEA
Incheon Intl
Fri 3/5
12:45 pm-9:12 pm
3 stops25h 27m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$832
IncheonSeattle
ICN Incheon Intl - SEA Seattle/Tacoma Intl
ICNSEA
Incheon Intl
Wed 3/3
12:45 pm-9:12 pm
3 stops25h 27m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$832
IncheonSeattle
ICN Incheon Intl - SEA Seattle/Tacoma Intl
ICNSEA
Incheon Intl
Thu 12/3
12:45 pm-9:21 pm
3 stops25h 36m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$840
IncheonSeattle
ICN Incheon Intl - SEA Seattle/Tacoma Intl
ICNSEA
Incheon Intl
Wed 11/4
6:45 pm-11:51 am
Nonstop10h 06m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$849
Showing 1-10 of 23 resultsSorted by cheapest first
Compare providers for flights from Incheon Intl to Seattle
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Incheon Intl to Seattle in September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*2 stars | |
| Price Accuracy2 stars | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Incheon Intl Airport-Seattle flights, users find the pricing of BusinessClass to be most consistent on Cheapflights vs. BusinessClass Users can find the same prices on Incheon Intl Airport-Seattle flight deals on Cheapflights vs. BusinessClass >95% of the time. Price accuracy is based on data collected from Incheon Intl Airport-Seattle flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Incheon Intl Airport-Seattle flights, Cheapflights users trust BusinessClass the most. BusinessClass has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Incheon Intl Airport-Seattle flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Incheon Intl to Seattle
Have a flexible travel schedule? Discover the best time to fly to Seattle from Incheon Intl with our price prediction graph.
ICN-SEA
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Incheon Intl Airport to Seattle
Prices
Airlines
Delays
More
How far ahead should I book a flight from Incheon Intl Airport to Seattle?
To ensure you get the cheapest price possible for a flight from Incheon Intl Airport to Seattle, you should look to book at least 24 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
What is the cheapest month to book a flight from Incheon Intl Airport to Seattle?
Currently, November is the cheapest month in which you can book a flight from Incheon Intl Airport to Seattle (average of $566). Flying from Incheon Intl Airport to Seattle in June is currently the most expensive (average of $1,104). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from ICN to SEA?
Find hourly flight availability from Incheon Intl to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 9, 2026.
When flying from Incheon Intl Airport to Seattle, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
How often are flights from Incheon to Seattle delayed?
About 22% of weekly flights between Incheon and Seattle have experienced delays in the past year, with the average delay time being 151 minutes.
What is the most punctual flight time for Incheon to Seattle flights?
Historically, flights departing in the evening are less likely to be delayed, whereas flights leaving at night tend to experience delays more often.
What day of the week experiences the fewest flight delays on this route?
Wednesday tends to have the lowest number of delays on this route, whereas Saturday has historically faced a higher average of delays compared to other days of the week.
Which airline has the best punctuality record on Incheon to Seattle flights?
Over the last year, Alaska Airlines have had the lowest number of delays on this route, with just 15% of flights being delayed.
What’s the top layover airport for flights from Incheon Intl Airport to Seattle?
Share of 1-stop round-trip flights from Incheon Intl Airport to Seattle chosen by Cheapflights users in the past 12 months, using the same layover each way.
Vancouver (YVR) – chosen by Cheapflights users on 85% of 1-stop itineraries from Incheon Intl Airport to Seattle on Cheapflights.
What’s the cheapest layover airport for flights from Incheon Intl Airport to Seattle?
Average round-trip fare for 1-stop flights from Incheon Intl Airport to Seattle, chosen by Cheapflights users in the past 12 months, with the same layover each way.
Vancouver (YVR) is the most affordable 1-stop option, with an average round-trip price of $569.
What’s the fastest layover option from Incheon Intl Airport to Seattle?
Shortest average travel time for 1-stop one-way flights from Incheon Intl Airport to Seattle, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.
Flights via Vancouver (YVR) have the shortest average one-way travel time for 1-stop routes: 14h 10m.
Which airport typically offers the quickest layover for flights from Incheon Intl Airport to Seattle?
Average layover duration for 1-stop one-way flights from Incheon Intl Airport to Seattle, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via San Francisco (SFO) offer the fastest connection on this route, with an average layover time of 2h 06m.
The best insider tips for Incheon Intl Airport to Seattle flights
AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Incheon Intl Airport to Seattle trip
Our travel experts
Reviews of airlines servicing Seattle
Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated September 9, 2026.
See what other customers who have flown with Korean Air,Asiana Airlines, andAlaska Airlines from Incheon Intl Airport to Seattle have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
8.2
Crew
8.7
Food
8.1
Overall
8.4
Boarding
8.5
Comfort
8.3
Reviews
1 / 20
10.0
ExcellentJacqueline,Aug 2025
ICN - SEA
Entertainment
8.2
Crew
8.7
Food
8.1
Overall
8.4
Boarding
8.5
Comfort
8.3
Reviews
1 / 20
10.0
ExcellentJacqueline,Aug 2025
ICN - SEA
Entertainment
8.2
Crew
8.7
Food
8.1
Overall
8.4
Boarding
8.5
Comfort
8.3
Reviews
1 / 20
10.0
ExcellentJacqueline,Aug 2025
ICN - SEA
Entertainment
8.2
Crew
8.7
Food
8.1
Overall
8.4
Boarding
8.5
Comfort
8.3
Reviews
1 / 20
10.0
ExcellentJacqueline,Aug 2025
ICN - SEA
Entertainment
8.2
Crew
8.7
Food
8.1
Overall
8.4
Boarding
8.5
Comfort
8.3
Reviews
1 / 20
10.0
ExcellentJacqueline,Aug 2025
ICN - SEA
Entertainment
8.2
Crew
8.7
Food
8.1
Overall
8.4
Boarding
8.5
Comfort
8.3
Reviews
1 / 20
10.0
ExcellentJacqueline,Aug 2025
ICN - SEA
Related info for your journey
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Incheon Intl and Seattle flights
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Top 6 airlines flying from Incheon Intl to Seattle
Discover the top 6 airlines that operate flights from Incheon Intl to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated September 9, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$349 | Average$595 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$449 | Average$748 | FlexibilityNo cancel fee | On-time81% | |
| Cheapest$472 | Average$501 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$476 | Average$775 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$511 | Average$651 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$618 | Average$773 | FlexibilityNo cancel fee | On-timeN/A |