Rome to Seattle (FCO–SEA) — Airlines, Schedules & Connections
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No nonstop flights on this route. connecting options below.
FCO–SEA is served by 2 airlines with nonstop service. Alaska Airlines and Delta Air Lines lead the route. The flight covers 5,673 miles in approximately 11h 20m. Beyond nonstop, 41 hubs offer 1-stop connections.
Airline Landscape
| Airline | Freq/wk | Aircraft | Duration | Dep OTP | Alliance | Codeshares |
|---|---|---|---|---|---|---|
| AS Alaska Airlines | 7 | 789 | 11h20 | – | Oneworld | – |
| DL Delta Air Lines | 4 | 339 | 12h | – | SkyTeam | – |
Weekly Schedule Pattern
Connection Landscape
Travel Essentials
FCO: CEST · SEA: PDT
When it's 6:00 PM in Rome, it's 9:00 AM in Seattle.
Italian passport holders enter the US under the Visa Waiver Program (VWP) for stays up to 90 days. An approved ESTA (Electronic System for Travel Authorization) is required before boarding and costs USD 21. ESTA approval is valid for 2 years or until the passport expires, whichever comes first. Stays cannot be extended beyond 90 days under the VWP. The passport must be machine-readable and include an electronic chip.
Leonardo Express non-stop train runs from Roma Termini to FCO in 32 minutes (€14, no stops). Regional trains (FL1 line) make stops including Trastevere, Ostiense, Tuscolana, and Tiburtina; slower (45–55 min) but cheaper (€8) and useful if you're not near Termini. Trains run every 15 minutes from Termini and every 30 minutes for regional services.Taxis from central Rome have a fixed fare: €50 (within the Aurelian Walls), €55–60 for outer neighborhoods. The fixed rate is mandatory; insist if the driver tries to use a meter. Ride-hail apps (Uber Black, itTaxi) are available but pricier than taxis on this route.
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.
FCO–SEA Quick Facts
Frequently Asked Questions
Flights from FCO to SEA
Rome–Fiumicino Leonardo da Vinci International Airport (FCO) and Seattle–Tacoma International Airport (SEA) are connected by nonstop service from Alaska Airlines and Delta Air Lines. With 11 weekly departures, this is a regularly served route.
FCO to SEA Flight Duration and Schedule
Nonstop flight time from FCO to SEA ranges from 11 hours 20 minutes to 12 hours 0 minutes. The route covers a distance of 5,673 miles (9,130 km). There are approximately 11 weekly flights outbound and 11 return, totaling 22 flights per week in both directions.
Connecting Options and Alternatives
41 one-stop connections are available, with the fastest taking approximately 11 hours via LUX. Two-stop connections are also available via intermediate hubs.