Cheap Flights from Seoul to Seattle from $309

Frequently Asked Questions

• What are the cheapest flights from Seoul to Seattle (SEL-SEA)?

  Based on Trip.com data, T'Way Air offers one-way fares as low as $309 on Cheapest nonstop routes (e.g. ICN to SEA on Sun, Feb 1), while Air Canada offers Cheapest nonstop round-trips from $478 departing on Mon, Feb 9 and returning on Wed, Feb 11.

• Which airlines offer direct flights from Seoul to Seattle?

  At the moment, you can catch a nonstop flight from Seoul to Seattle with the following airlines, including: Hawaiian Airlines Asiana Airlines Korean Air Delta Air Lines Alaska Airlines Selected airlines are based on historical data collected from flight bookings users made on Trip.com within the last 90 days.

• How long does it take to fly from Seoul (SEL) to Seattle (SEA) and what is the distance?

  It takes around 10 hours 10 minutes to fly from Seoul (SEL) to Seattle (SEA).

• When is the best time to book flights from Seoul to Seattle?

  By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Seoul to Seattle is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.

• How many flights are there per week from Seoul to Seattle?

  Based on Trip.com data in the past 4 weeks, there is 24 flight per week flying from Seoul to Seattle. You can check the weekly schedule for popular airlines on this route below: Korean Air: S/M/T/W/T/F/S -- KE5019 (20:50) Delta Air Lines: S/M/T/W/T/F/S -- DL7837 (16:44) Delta Air Lines: S/M/T/W/T/F/S -- DL196 (20:50)

• How can I find the best deals on flights from Seoul to Seattle?

  To find best deals on flights from Seoul to Seattle, you can use various tools on Trip.com:
  · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Sun, Feb 1, with one-way flights priced at just $309.
  · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Hawaiian Airlines.
  · Set up price alerts to easily monitor ticket prices without having to check every day.
  · Check Trip.com flight deals and promo codes frequently.
  · Avoid peak season unless you book very early. It seems the peak season for Seattle travel is around July.
  · Get exclusive promo codes for Trip.com app users.

• When are flight tickets from Seoul (SEL) to Seattle (SEA) the cheapest?

  The cheapest months to fly from Seoul to Seattle is December, when demand for travel is lower.

• Which upcoming date is cheapest to fly from Seoul to Seattle on?

  After crunching the numbers on our December flight calendar, it's currently cheapest to fly from Seoul to Seattle on December 22, 2025 with Hawaiian Airlines, with prices starting at $343.

• Which airports can I fly to for Seattle from Seoul?

  You can land at any one of the following hubs in Seattle, with Incheon International Airport to Seattle–Tacoma International Airport (ICN-SEA) is by far the most common option on this route: Seattle–Tacoma International Airport (SEA) King County (Boeing Field) International Airport (BFI) Kenmore Air - Lake Union (LKE).

• Is there any time difference between Seoul and Seattle?

  The time difference between Seattle and Seoul is 17h.

• How do I change or cancel my ticket from Seoul to Seattle?

  Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.