Cheap flights from Houston to Sydney
Cheapest current fares: $640 in August 2026, 13,835 km direct flight in ~16h 17m.
Cheapest month-by-month fares
Lowest available fare per calendar month from Houston (IAH) to Sydney (SYD). Refreshed daily.
Houston (IAH) → Sydney (SYD)
- August 2026 $640
Frequently asked questions
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What is the cheapest month to fly from Houston to Sydney?
Based on current 6-month forward fare data, August 2026 is the cheapest month to fly from Houston (IAH) to Sydney (SYD), with fares starting from $640.
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What is the lowest current fare from IAH to SYD?
The lowest currently-listed fare from Houston (IAH) to Sydney (SYD) is $640 on 2026-08-07.
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How long is the flight from Houston to Sydney?
Direct flights from IAH to SYD cover approximately 13,835 km (8,597 miles), with an estimated flight time of 16h 17m. Operating airlines: UA.
Related guides for this route
Sibling pages — full route detail, airport overviews, visa context, per-airline routes.