Sydney (Mascot) to Dulles
19h 54m The flight from Sydney Kingsford Smith International Airport (SYD) to Washington Dulles International Airport (IAD) covers 15,681 km (9,744 miles) and takes approximately 19h 54m gate to gate for a typical jet.
The route heads east on an initial great-circle bearing of 68°, passing near 6.0° N, 147.2° W at its midpoint.
The route
The great-circle path — the shortest line between the two airports across the curve of the earth. On a flat map it looks bent; on a globe it is straight.
Flight time at different cruise speeds
Aircraft type, winds and routing all move the real number. This is the same distance flown at different speeds, plus the 25-minute ground and climb allowance.
| Typical of | Cruise speed | Airborne | Gate to gate |
|---|---|---|---|
| Turboprop / regional | 550 km/h | 28h 31m | 28h 56m |
| Narrowbody jet (A320, 737) | 780 km/h | 20h 06m | 20h 31m |
| Widebody jet (777, 787, A350) | 900 km/h | 17h 25m | 17h 51m |
| Private jet (Gulfstream) | 850 km/h | 18h 27m | 18h 52m |
Headwinds on an eastbound long-haul routinely add 30–60 minutes; the same route westbound can be quicker. Airlines publish schedules with padding built in.
Both airports
| SYD | IAD | |
|---|---|---|
| Airport | Sydney Kingsford Smith International Airport | Washington Dulles International Airport |
| City | Sydney (Mascot) | Dulles |
| Country | Australia | United States |
| ICAO | YSSY | KIAD |
| Coordinates | -33.9461, 151.177 | 38.9445, -77.4558 |
| Elevation | 21 ft | 312 ft |
Questions
How long is the flight from Sydney (Mascot) to Dulles?
A non-stop flight from Sydney (Mascot) (SYD) to Dulles (IAD) takes about 19h 54m. The great-circle distance is 15,681 km (9,744 miles, 8,467 nautical miles), flying east on an initial bearing of 68°.
How far is Sydney (Mascot) from Dulles?
15,681 kilometres in a straight line over the earth's surface — 9,744 miles or 8,467 nautical miles. Actual flown distance is usually 2–5% longer because aircraft follow airways, avoid weather and route around restricted airspace.
Is there a non-stop flight between SYD and IAD?
This page calculates the direct-line time and distance; it does not track airline schedules. At 15,681 km the route is at the extreme end of what any airliner can fly non-stop, so a connection is likely. Check an airline or booking site for what is actually scheduled.
What should I expect on a 19h 54m flight?
Anything past six hours is a long-haul flight: expect at least one meal service, a significant time-zone shift, and enough sitting that circulation and hydration start to matter. Cabin altitude, dry air and disrupted sleep do more damage to a training routine than the flight itself.
Other routes from Sydney (Mascot)
Airport coordinates from OurAirports (public domain). Distance is a great-circle calculation; flight time uses the model described on the method page. Flight times are great-circle estimates for planning only — always check the airline's published schedule.