How reliable is Sydney Kingsford Smith International Airport?
Flights from SYD avoided significant airline-controlled delay in 74% of 440,348 flights in official BITRE history. Here’s the full picture before you book.
Reliability score
on-time, cancellations & delays
Origin-airport operations
What the airline-controlled delay record at SYD looks like
Avoided 15+ min controlled delay
across 440,348 flights
Source: BITRE · data through 2026-08-30. Origin-grouped, cause-attributed operational history; it is not a direct departure-punctuality measure or a guarantee for any flight.
Weather by month
Weather history isn’t available for SYD yet
PlaneSane shows month-by-month airport weather once enough historical METAR/IEM observations are loaded for the airport. This does not mean the airport has no weather data forever; it means the current climatology table has no monthly coverage for Sydney Kingsford Smith International Airport.
Connecting through SYD
How much layover you really need
Allow at least this between domestic flights at SYD. Below it, one small delay risks a misconnect.
International transfers add immigration and bag recheck — give yourself this buffer at SYD or more.
PlaneSane connection-time estimate tuned for SYD's terminal layout. We score every connecting itinerary against conservative connection floors.
The read on SYD
What the numbers say about flying through Sydney Kingsford Smith International Airport
Across official performance history, flights from Sydney (Mascot) avoided significant airline-controlled delay about 74% of the time over 440,348 flights. That's a middling record — neither a strength nor a red flag on its own. Pair it with an elevated cancellation rate of 4.0% — worth weighing alongside the on-time figure. When a departure does run late, the typical delay is around 0 minutes.
If you're connecting through SYD, give yourself room. A domestic connection wants at least about 60 minutes, and international transfer wants roughly 90 minutes once immigration and a bag recheck are in the mix. Those are floors, not comfortable buffers — one inbound delay can erase them, so add margin when the connection matters.
None of this guarantees your specific flight — it’s the backdrop. To turn it into a booking, score real flights to Sydney (Mascot), read how we weigh it all in how the Peace of Mind Score works, and brush up with how to pick a reliable flight and avoiding weather delays.
Common questions about SYD
- How reliable is Sydney Kingsford Smith International Airport (SYD)?
- Flights from Sydney (Mascot) avoided significant airline-controlled delay roughly 74% of the time across 440,348 flights of official history — a middling record — neither a strength nor a red flag on its own. The cancellation rate runs about 4.0%. It's advisory context, not a guarantee for any single flight.
- How much layover time do you need at SYD?
- Allow at least about 60 minutes for a domestic connection and about 90 minutes for an international one as a floor. These are minimums, not comfortable buffers — a single inbound delay can wipe them out, so add margin when you can.
Peace of Mind
Where to stay in Sydney
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Reliability guides
Planning a trip through Sydney (Mascot)?
Score real flights to and from SYD on reliability, weather, and connection safety — not just price.
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