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SEA to STI: distance & flight time
Seattle (Seattle Tacoma International Airport) → Santiago (Cibao International Airport)
3,469 mi
5,583 km · 3,014 nm
7h 16m
estimated nonstop flight time
+3h
time difference · heading east
See live SEA→STI fares Phone-only fares on this route — call free
Flight time details
3,469 miles nonstop takes roughly 7h 16m gate to gate, flying east. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 3-hour time gain when reading arrival times on your ticket.
The two airports
- SEA — Seattle Tacoma International Airport · Seattle, United States
- STI — Cibao International Airport · Santiago, Dominican Republic
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 STI
Frequently asked questions
How far is SEA from STI?
The flight distance from Seattle (SEA) to Santiago (STI) is 3,469 miles (5,583 km, 3,014 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from SEA to STI?
A nonstop flight takes about 7h 16m 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 Santiago?
Santiago is 3 hours ahead of Seattle.
What is the cheapest way to fly from SEA to STI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on SEA–STI that never appear on search engines, with no booking fees.