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Delta Air Lines · Route guide

Delta Route Guide: Seattle to Seoul Incheon

Everything you need to fly Origin to Destination: when to go, who flies it, what it costs, and how to land well.

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1 airline on this route · Daily Year-Round

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Airline

Delta

Aircraft

Airbus A350-900

Service

Daily Year-Round

Region

Asia-Pacific

The route

The trans-Pacific connection between Seattle and Seoul Incheon is a cornerstone of Delta's Asia-Pacific network. Utilizing modern long-haul aircraft, this route serves as a vital bridge for both business travelers and tourists connecting the Pacific Northwest with one of Asia's most dynamic hubs.

Delta operates a year-round, daily non-stop service from Seattle-Tacoma International Airport (SEA) to Seoul Incheon International Airport (ICN). The flight spans the Pacific Ocean, typically taking around 12 hours, and is serviced by the Airbus A350-900.

As a primary hub for Delta on the West Coast, Seattle offers the shortest flight times from the contiguous United States to East Asia. The destination, Incheon Terminal 2, is a world-class facility and the primary hub for Delta's joint venture partner, Korean Air, allowing for seamless onward connections to Southeast Asia and China.

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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 International (SEA)

AIR

Check-in: International check-in is located in the main terminal, but Delta flights often depart from the South Satellite (S Gates).
Security: TSA PreCheck is available, but international travelers should arrive at least 3 hours before departure.
Connections: High-speed Wi-Fi is available throughout the airport, and the South Satellite features a large Delta Sky Club.

Arrival

Seoul Incheon International (ICN)

SEA

On arrival: Delta arrives at Terminal 2, which is dedicated to SkyTeam carriers and offers automated immigration gates for eligible travelers.
Ground transport: The AREX Express train connects Terminal 2 to Seoul Station in approximately 51 minutes.
Planning ahead: Currency exchange and SIM card kiosks are available immediately after exiting the customs hall.

Timing & fares

When it flies, what it costs.

Schedule & reliability

Schedule: Flights usually depart Seattle in the late morning or early afternoon, arriving in Seoul the following afternoon.
Duration: Westbound flights are longer due to jet stream resistance, while eastbound return flights are typically shorter.
Seasonality: The route maintains a consistent daily schedule throughout summer and winter seasons.
Time zones: Seoul is 16 hours ahead of Seattle during Daylight Saving Time.

Fares & booking

Booking window: For the best rates, aim to book between 90 to 120 days before departure.
Cabin advice: On the A350, Main Cabin seats are 3-3-3; consider an exit row for extra legroom on this long-haul flight.
Peak pricing: Fares spike significantly during Lunar New Year and the Chuseok autumn festival.

Monitor prices at least 4 months in advance for the best trans-Pacific value.
Consider Premium Select for a balance of cost and comfort on the 12-hour journey.
Use the Delta FlyReady tool to manage international entry documents digitally.

Peak season

June through August and December holiday weeks.

Shoulder season

April to May and September to October.

Off-peak season

Late January to early March.

Tours and experiences at either end

Vetted day trips and activities in Destination and Origin, through our travel partner.

Browse tours

When to fly

Best Time to Fly Origin to Destination

01
Spring (April-May)
Ideal weather and cherry blossom season make this the most popular time to visit.
02
Autumn (September-October)
Mild temperatures and vibrant fall foliage provide a beautiful backdrop for travel.
03
Winter (January-February)
Lower fares can be found, though temperatures in Seoul can be quite cold.

Trip planning

Who this route suits best.

Business Travelers

Direct access to South Korea's economic heart with reliable daily schedules.

Transit Passengers

Excellent connectivity via Incheon to cities like Bangkok, Ho Chi Minh City, and Manila.

Leisure Explorers

The non-stop flight minimizes travel fatigue for those visiting Seoul's palaces and markets.

Connections & alternatives

Bangkok (BKK)

A popular onward connection from Seattle via Delta's partner hub in Seoul.

Singapore (SIN)

Seamless SkyTeam connectivity through Incheon's Terminal 2.

Tokyo (NRT/HND)

Seoul is a convenient intermediate stop for multi-city East Asian itineraries.

Field notes

Travel Tips for the Origin-Destination Route

Visa & entry

U.S. citizens may need to apply for a K-ETA (Korea Electronic Travel Authorization) prior to departure.
A valid passport with at least six months of validity is required.
Check current South Korean customs regulations regarding food and electronic items.

Airport transfers

The Airport Limousine Bus network covers almost every major hotel and district in Seoul.
Taxis are available at Terminal 2 with both standard and 'International' (English-speaking) options.
The T-Money card is essential for using the subway and local buses within Seoul.

Baggage & transit

Standard Delta international baggage allowances apply, typically including one or two checked bags depending on cabin class.
If connecting at ICN to Korean Air, your bags will be checked through to your final destination.
The transfer process at Terminal 2 is streamlined and rarely requires re-clearing security for international-to-international connections.

Checklist

Apply for K-ETA or visa
Book AREX train tickets in advance
Download the Calm app for the long flight
Pack a universal power adapter for South Korean outlets

Carriers

Airlines Flying Origin to Destination

Delta

Once daily non-stop service.

The A350-900 is the flagship aircraft for this long-haul mission.

FAQ

Common questions.

Straight answers about flying Origin to Destination.

What aircraft does Delta fly from Seattle to Seoul?

Delta primarily uses the Airbus A350-900 for its non-stop service from Seattle to Seoul Incheon.

How long is the flight from SEA to ICN?

The average flight time is approximately 11 hours and 50 minutes when traveling to Seoul, and about 10 hours on the return leg.

Which terminal does Delta use at Seoul Incheon?

Delta operates exclusively out of Terminal 2 at Seoul Incheon International Airport.

Are meals provided on the Delta flight to Seoul?

Yes, Delta provides multiple complimentary meals, snacks, and beverages, including both Western and Korean menu options.

Is there Wi-Fi on the Delta SEA-ICN flight?

Yes, the Airbus A350-900 is equipped with satellite Wi-Fi, which is available for purchase during the flight.

Keep exploring

Where to next.

Structured data verified

Airports

Seattle (SEA)Incheon International Airport (ICN)Seattle-Tacoma International Seoul Incheon International

Countries & layovers

United States South Korea Seattle layover guide

Flown AIR to SEA? Keep it.

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Three steps

1Add the flight to your Borderly profile to track your trans-Pacific mileage.
2Use the Fly Delta app for real-time aircraft tracking and gate updates.
3Log your arrival at Incheon to compare transit times across different Asian hubs.

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