Sydney (Mascot) to Boston
20h 36m The flight from Sydney Kingsford Smith International Airport (SYD) to Boston Logan International Airport (BOS) covers 16,251 km (10,098 miles) and takes approximately 20h 36m gate to gate for a typical jet.
The route heads north-east on an initial great-circle bearing of 63°, passing near 11.4° N, 148.4° 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 | 29h 33m | 29h 58m |
| Narrowbody jet (A320, 737) | 780 km/h | 20h 50m | 21h 15m |
| Widebody jet (777, 787, A350) | 900 km/h | 18h 03m | 18h 29m |
| Private jet (Gulfstream) | 850 km/h | 19h 07m | 19h 32m |
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 | BOS | |
|---|---|---|
| Airport | Sydney Kingsford Smith International Airport | Boston Logan International Airport |
| City | Sydney (Mascot) | Boston |
| Country | Australia | United States |
| ICAO | YSSY | KBOS |
| Coordinates | -33.9461, 151.177 | 42.362, -71.0079 |
| Elevation | 21 ft | 20 ft |
Questions
How long is the flight from Sydney (Mascot) to Boston?
A non-stop flight from Sydney (Mascot) (SYD) to Boston (BOS) takes about 20h 36m. The great-circle distance is 16,251 km (10,098 miles, 8,775 nautical miles), flying north-east on an initial bearing of 63°.
How far is Sydney (Mascot) from Boston?
16,251 kilometres in a straight line over the earth's surface — 10,098 miles or 8,775 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 BOS?
This page calculates the direct-line time and distance; it does not track airline schedules. At 16,251 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 20h 36m 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.