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SEA to SYD: distance & flight time
Seattle (Seattle Tacoma International Airport) → Sydney (Sydney Kingsford Smith International Airport)
7,750 mi
12,472 km · 6,734 nm
15h 40m
estimated nonstop flight time
+17h
time difference · heading southwest
See live SEA→SYD fares Phone-only fares on this route — call free
Flight time details
7,750 miles nonstop takes roughly 15h 40m gate to gate, flying southwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 17-hour time gain when reading arrival times on your ticket.
The two airports
- SEA — Seattle Tacoma International Airport · Seattle, United States
- SYD — Sydney Kingsford Smith International Airport · Sydney, Australia
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 SYD
- BWU · Sydney Bankstown Airport11 mi away
- CDU · Camden Airport29 mi away
- XRH · RAAF Base Richmond33 mi away
- WOL · Wollongong Airport48 mi away
Frequently asked questions
How far is SEA from SYD?
The flight distance from Seattle (SEA) to Sydney (SYD) is 7,750 miles (12,472 km, 6,734 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from SEA to SYD?
A nonstop flight takes about 15h 40m 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 Sydney?
Sydney is 17 hours ahead of Seattle.
What is the cheapest way to fly from SEA to SYD?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on SEA–SYD that never appear on search engines, with no booking fees.