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GAI to SYD: distance & flight time
Gaithersburg (Montgomery County Airpark) → Sydney (Sydney Kingsford Smith International Airport)
9,761 mi
15,709 km · 8,482 nm
19h 36m
estimated nonstop flight time
+14h
time difference · heading west
See live GAI→SYD fares Phone-only fares on this route — call free
Flight time details
9,761 miles nonstop takes roughly 19h 36m gate to gate, flying west. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 14-hour time gain when reading arrival times on your ticket.
The two airports
- GAI — Montgomery County Airpark · Gaithersburg, 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 GAI
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 GAI from SYD?
The flight distance from Gaithersburg (GAI) to Sydney (SYD) is 9,761 miles (15,709 km, 8,482 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from GAI to SYD?
A nonstop flight takes about 19h 36m 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 Gaithersburg and Sydney?
Sydney is 14 hours ahead of Gaithersburg.
What is the cheapest way to fly from GAI to SYD?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on GAI–SYD that never appear on search engines, with no booking fees.