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Delta Air Lines · Route guide

Flying Delta Air Lines from SEA (Seattle) to ICN (Seoul-Incheon): Route Insights

Everything you need to fly Seattle to Seoul-Incheon: when to go, who flies it, what it costs, and how to land well.

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4 airlines on this route · Scheduled transpacific service

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Airline

Delta Air Lines

Service

Scheduled transpacific service

Region

North America to East Asia

The route

Welcome to your comprehensive guide for the Delta Air Lines route from Seattle-Tacoma International Airport (SEA) to Incheon International Airport (ICN). This popular transpacific route connects the vibrant US Pacific Northwest with the bustling capital of South Korea. Key data points for this route include an average flight duration of approximately 11 hours and 50 minutes. Delta often utilizes Airbus A350-900 or A330-900neo aircraft on this long-haul journey. Seattle serves as a significant hub for Delta's transpacific operations.

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Airports

Taking off, touching down.

Check-in, security, connections and getting into town at both ends of the flight.

Departure

Seattle-Tacoma (SEA)

SEA

Check-in: SEA is a significant Delta transpacific hub — the standard international buffer applies.
Security: Security wait times vary by time of day — check current status before heading out.
Connections: The Link light rail connects SEA to downtown Seattle.

Arrival

Seoul Incheon (ICN)

ICN

On arrival: Incheon is consistently rated among the world's most efficient airports for arrivals.
Ground transport: The AREX express train reaches Seoul Station in around 43 minutes.
Planning ahead: Check current South Korean entry requirements for your nationality ahead of travel.

Timing & fares

When it flies, what it costs.

Fares & booking

Booking window: Booking 2-3 months ahead is sensible for this transpacific route outside Korean holiday peaks.
Cabin advice: At nearly 12 hours in the air, Delta One lie-flat seating on the A350/A330neo is a meaningful comfort upgrade.
Peak pricing: Chuseok and Lunar New Year both drive strong demand.

Tours and experiences at either end

Vetted day trips and activities in Seoul-Incheon and Seattle, through our travel partner.

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When to fly

Best Time to Fly SEA (Seattle) to ICN (Seoul-Incheon)

The best time to fly from Seattle to Seoul often depends on a balance of weather and cost. Generally, shoulder seasons like spring (April-May) and fall (September-October) offer pleasant temperatures in Seoul and potentially lower airfares compared to peak summer months. September is often cited as a cheaper month for flights. Booking about 40 days in advance may also yield better prices. Consider major Korean holidays like Chuseok (Korean Thanksgiving, typically in September or October) when planning, as demand can be higher.

Field notes

Travel Tips for the SEA (Seattle) - ICN (Seoul-Incheon) Route

01
Book in Advance: Especially during peak seasons or holidays, booking your Delta flight from Seattle to Seoul well in advance is recommended to secure better fares and seat availability.
02
Prepare for a Long Flight: With a flight time of nearly 12 hours, pack essentials for comfort such as a neck pillow, entertainment, and any necessary medications.
03
Arrival in Incheon: Incheon International Airport (ICN) is located about an hour from Seoul. Plan your transportation to the city center in advance (e.g., AREX train, bus, or taxi).
04
Manage Jet Lag: The time difference between Seattle and Seoul is significant (Seoul is 16 hours ahead). Try to adjust your sleep schedule gradually. Staying hydrated and trying to sleep on the plane according to Seoul's local time can help.
05
Currency and Connectivity: Ensure you have some South Korean Won (KRW) upon arrival or a plan to exchange currency. Consider getting a local SIM card or an international data plan for connectivity.

Carriers

Airlines Flying SEA (Seattle) to ICN (Seoul-Incheon)

Delta Air Lines

Delta Air Lines typically operates daily nonstop flights on the SEA-ICN route.

Korean Air

Korean Air also offers daily nonstop service between Seattle and Seoul-Incheon.

Asiana Airlines

Asiana Airlines provides daily nonstop flights connecting SEA and ICN.

Hawaiian Airlines

Hawaiian Airlines is scheduled to begin nonstop service on this route starting September 2025.

FAQ

Common questions.

Straight answers about flying Seattle to Seoul-Incheon.

How long is the flight from Seattle to Seoul?

Typically around 11 hours 50 minutes, per the route's published schedule.

What aircraft does Delta use?

Delta often utilizes Airbus A350-900 or A330-900neo aircraft on this long-haul journey.

Do I need a visa for South Korea?

Requirements vary by nationality — check current South Korean entry rules ahead of travel.

Keep exploring

Where to next.

Countries & layovers

Seattle layover guide Seoul layover guide

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