Copenhagen to Seattle (CPH–SEA) — Airlines, Schedules & Connections

Denmark is part of the US Visa Waiver Program. Danish citizens must obtain an ESTA (Electronic System for Travel Authorization) before travel. The ESTA costs $21, is valid for 2 years or until the passport expires, and allows stays of up to 90 days per visit. An e-passport with a biometric chip is required.

The Metro M2 line connects central Copenhagen (Kongens Nytorv, Christianshavn, Vanløse) to the airport in 15–16 minutes from Kongens Nytorv for DKK 36 (Rejsekort card). Trains run 24 hours, every 4 minutes at peak and every 6 minutes at night; one of the most frequent airport rail links in Europe. DSB regional trains also call at the airport station.The Øresund train connects directly to Malmö Central (Sweden) in 35 minutes from the airport; a cross-border connection unique among European airports. Taxis from the city centre cost DKK 250–350 (€33–47). Uber is available. Driving from Copenhagen takes 10–15 minutes via E20 motorway.

Link Light Rail from the airport station (inside the terminal) to downtown Seattle takes 38 minutes ($3.50). No transfers needed; trains run 5am to 1am daily.Taxis and ride-shares to downtown cost $35–55. For Bellevue and Eastside destinations (across Lake Washington), ride-share is faster than Link. Car rentals are in the consolidated rental facility; take the free shuttle from baggage claim. Sound Transit buses serve Tacoma, Renton, and Federal Way.

Marine west coast climate. Winters are mild but persistently grey and rainy (3–9°C). Snow is rare at sea level but can occur December through February, causing significant disruptions when it does. The airport sits between Seattle and Tacoma in an area that receives more fog and low cloud than downtown Seattle.

Summers are famously pleasant (18–25°C) with low humidity and mostly clear skies, one of the best flying climates in the US from June through September. The wettest months are November through January.