Need help booking?
Unpublished phone-only deals available
GRK to SYD: distance & flight time
Killeen (Robert Gray Army Air Field Airport) → Sydney (Sydney Kingsford Smith International Airport)
8,490 mi
13,663 km · 7,377 nm
17h 7m
estimated nonstop flight time
+15h
time difference · heading southwest
See live GRK→SYD fares Phone-only fares on this route — call free
Flight time details
8,490 miles nonstop takes roughly 17h 7m gate to gate, flying southwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 15-hour time gain when reading arrival times on your ticket.
The two airports
- GRK — Robert Gray Army Air Field Airport · Killeen, 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 GRK
- HLR · Hood Army Air Field8 mi away
- AUS · Austin Bergstrom International Airport61 mi away
- TPL · Draughon Miller Central Texas Regional Airport26 mi away
- ACT · Waco Regional Airport52 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 GRK from SYD?
The flight distance from Killeen (GRK) to Sydney (SYD) is 8,490 miles (13,663 km, 7,377 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from GRK to SYD?
A nonstop flight takes about 17h 7m 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 Killeen and Sydney?
Sydney is 15 hours ahead of Killeen.
What is the cheapest way to fly from GRK to SYD?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on GRK–SYD that never appear on search engines, with no booking fees.