Kathmandu to Sydney (Mascot)
12h 31mgate to gate
The flight from Tribhuvan International Airport (KTM) to Sydney Kingsford Smith International Airport (SYD) covers 9,744 km (6,055 miles) and takes approximately 12h 31m gate to gate for a typical jet.
The route heads south-east on an initial great-circle bearing of 131°, passing near 3.7° S, 117.1° E at its midpoint.
Bearing 131° south-east Midpoint 3.7° S, 117.1° E Model 805 km/h + 25 min
SOURCE·OurAirports + great-circle computation·REVIEWED JUL 2026
How this is worked out
- Take both airports' published coordinates from OurAirports — nothing here is scraped from another flight site.
- Great-circle distance by haversine on a mean earth radius of 6,371.0088 km: 9,744 km.
- Airborne time = that distance ÷ 805 km/h, a representative jet cruise speed: 12h 06m.
- Add a flat 25 minutes for pushback, taxi, climb, descent and taxi-in — the reason a 400 km hop is never half an hour: 12h 31m gate to gate.
- Winds, aircraft type and airline schedule padding are not modelled. The cruise-speed table shows how much that assumption is worth.
9,744 km / 805 km/h = 12h 06m airborne
+ 25 min ground = 12h 31m gate to gate
SOURCE·OurAirports + great-circle computation·REVIEWED JUL 2026
The same route, plotted on a world grid
The strip above gives the route its length and its shape. This gives it a position: latitude and longitude only, no coastlines, because a hand-drawn coastline would be decoration pretending to be data. On a flat grid the shortest path 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 | 17h 43m | 18h 08m |
| Narrowbody jet (A320, 737) | 780 km/h | 12h 30m | 12h 55m |
| Widebody jet (777, 787, A350) | 900 km/h | 10h 50m | 11h 15m |
| Private jet (Gulfstream) | 850 km/h | 11h 28m | 11h 53m |
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.
SOURCE·OurAirports + great-circle computation·REVIEWED JUL 2026
Both airports
| KTM | SYD | |
|---|---|---|
| Airport | Tribhuvan International Airport | Sydney Kingsford Smith International Airport |
| City | Kathmandu | Sydney (Mascot) |
| Country | Nepal | Australia |
| ICAO | VNKT | YSSY |
| Coordinates | 27.6966, 85.3591 | -33.9461, 151.177 |
| Elevation | 4,390 ft | 21 ft |
Every figure on this plate is geometry. The shape of the earth is knowable; the airline's schedule is not.
Questions this plate answers
How long is the flight from Kathmandu to Sydney (Mascot)?
A non-stop flight from Kathmandu (KTM) to Sydney (Mascot) (SYD) takes about 12h 31m. The great-circle distance is 9,744 km (6,055 miles, 5,261 nautical miles), flying south-east on an initial bearing of 131°.
How far is Kathmandu from Sydney (Mascot)?
9,744 kilometres in a straight line over the earth's surface — 6,055 miles or 5,261 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 KTM and SYD?
This page calculates the direct-line time and distance; it does not track airline schedules. At 9,744 km the route is comfortably within range of a non-stop service if an airline chooses to fly it. Check an airline or booking site for what is actually scheduled.
What should I expect on a 12h 31m 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.
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.
