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SEA to DCI: distance & flight time
Seattle (Seattle Tacoma International Airport) → Decimomannu (Decimomannu Air Base)
5,734 mi
9,227 km · 4,982 nm
11h 43m
estimated nonstop flight time
+9h
time difference · heading northeast
See live SEA→DCI fares Phone-only fares on this route — call free
Flight time details
5,734 miles nonstop takes roughly 11h 43m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 9-hour time gain when reading arrival times on your ticket.
The two airports
- SEA — Seattle Tacoma International Airport · Seattle, United States
- DCI — Decimomannu Air Base · Decimomannu, Italy
Distances are great-circle ("as the crow flies") — the same basis airlines use for frequent-flyer miles.
Alternate airports can cut this fare
Flying from or into a nearby airport is the #1 trick our agents use to beat online prices. Call and we'll compare every combination on one call.
Near SEA
- RNT · Renton Municipal Airport5 mi away
- BFI · Boeing Field King County International Airport6 mi away
- TIW · Tacoma Narrows Airport18 mi away
- PWT · Bremerton National Airport21 mi away
Near DCI
- CAG · Cagliari Elmas Airport8 mi away
- FNU · Oristano-Fenosu Airport41 mi away
- TTB · Tortolì Airport54 mi away
- AHO · Alghero-Fertilia Airport95 mi away
Frequently asked questions
How far is SEA from DCI?
The flight distance from Seattle (SEA) to Decimomannu (DCI) is 5,734 miles (9,227 km, 4,982 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from SEA to DCI?
A nonstop flight takes about 11h 43m gate to gate. Actual time varies with winds, routing and season — eastbound transatlantic flights, for example, are usually faster than the return.
What is the time difference between Seattle and Decimomannu?
Decimomannu is 9 hours ahead of Seattle.
What is the cheapest way to fly from SEA to DCI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on SEA–DCI that never appear on search engines, with no booking fees.