Houston (IAH) to Sydney (SYD)
Flight time
≈ 18h 00m
Bearing
247° SW
Houston (IAH) to Sydney (SYD) is 8,597 miles (13,836 km) as the crow flies — the great-circle baseline most distance-based mileage programs credit.
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What actually flies IAH–SYD
US DOT T-100 · filed dataIn March 2026, United Airlines was the only carrier flying nonstop IAH–SYD; the Boeing 787-9 was the most common aircraft at 100% of departures; flights ran 79% full.
Departures
53
March 2026
Seats
13,621
both directions
Passengers
10,709
both directions
Load factor
78.6%
passengers ÷ seats
Who flies IAH–SYD?
United Airlines was the only carrier to fly nonstop IAH–SYD in March 2026 (53 departures).
- UA
United Airlines
53 departures · 13,621 seats
Share of departures100.0%78.6%
Load
What plane flies IAH–SYD?
In March 2026, the Boeing 787-9 flew 100% of IAH–SYD departures.
- Boeing 787-9
53 departures · 78.6% load
100.0%
How has IAH–SYD traffic changed?
Nonstop IAH–SYD departures rose from 1 in August 2025 to 53 in March 2026.
Monthly nonstop IAH–SYD traffic, trailing 12 months through March 2026. Bars scale to the busiest month; months with no filed service show as zero.
August 2025
1 departures · 206 passengers
87.3%
Load
September 2025
0 departures · 0 passengers
—
Load
October 2025
13 departures · 1,836 passengers
55.3%
Load
November 2025
60 departures · 9,078 passengers
58.9%
Load
December 2025
60 departures · 11,711 passengers
75.9%
Load
January 2026
59 departures · 11,246 passengers
74.2%
Load
February 2026
56 departures · 8,695 passengers
60.4%
Load
March 2026
53 departures · 10,709 passengers
78.6%
Load
By direction
The DOT files each direction separately — they rarely match.
SYD → IAH
88.6% full
28 departures · 6,375 passengers
IAH → SYD
67.5% full
25 departures · 4,334 passengers
Nonstop IAH–SYD traffic has been filed with the US DOT since 2025.
Source: US DOT BTS Form 41 T-100 Segment (All Carriers). Data through March 2026; filings from 2025. Public domain (US Government work). The DOT publishes roughly three months in arrears.
The airports
Sydney
AU
Sydney Kingsford Smith International Airport
Coordinates
33.95°S, 151.18°E
Hemisphere
S · E
Frequently asked
How far is Houston (IAH) from Sydney (SYD)?
IAH to SYD is 8,597 miles (13,836 km / 7,471 nautical miles) measured great-circle — the shortest path over the surface of the Earth.
How long is the flight from IAH to SYD?
A nonstop covers the 8,597-mile great-circle distance in roughly 18h 00m of block time, before winds. Actual schedules vary a few percent by direction and aircraft.
What plane flies IAH–SYD?
In March 2026, the Boeing 787-9 flew the largest share of departures (100.0%).
What mileage do I earn flying IAH–SYD?
Distance-based programs credit off the 8,597-mile great-circle figure, then apply your fare-class earning rate. Revenue-based programs credit off the fare instead.
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