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IAH to SYD: distance & flight time
Houston (George Bush Intercontinental Houston Airport) → Sydney (Sydney Kingsford Smith International Airport)
8,597 mi
13,836 km · 7,471 nm
17h 19m
estimated nonstop flight time
+15h
time difference · heading southwest
See live IAH→SYD fares Phone-only fares on this route — call free
Flight time details
8,597 miles nonstop takes roughly 17h 19m 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
- IAH — George Bush Intercontinental Houston Airport · Houston, 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 IAH
- DWH · David Wayne Hooks Memorial Airport14 mi away
- IWS · West Houston Airport23 mi away
- AAP · Andrau Airpark23 mi away
- HOU · William P Hobby Airport24 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 IAH from SYD?
The flight distance from Houston (IAH) to Sydney (SYD) is 8,597 miles (13,836 km, 7,471 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from IAH to SYD?
A nonstop flight takes about 17h 19m gate to gate. Actual time varies with winds, routing and season — eastbound transatlantic flights, for example, are usually faster than the return.
Are there nonstop flights from IAH to SYD?
Nonstop service on IAH–SYD depends on the season and the day of week. Run the fare search on this page with the nonstop filter applied to see current direct options; when there is no nonstop, a single connection through a carrier hub adds roughly 2–4 hours to the 17h 19m nonstop estimate.
What is the time difference between Houston and Sydney?
Sydney is 15 hours ahead of Houston.
What is the cheapest way to fly from IAH to SYD?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on IAH–SYD that never appear on search engines, with no booking fees.
Why are some IAH to SYD fares phone-only?
Consolidator contracts let us sell certain IAH–SYD tickets below the price airlines permit us to publish online, so those fares can only be quoted over the phone. Call the travel desk and an agent will check phone-only inventory for your dates.