How reliable is Perth International Airport?
Flights from PER avoided significant airline-controlled delay in 77% of 140,103 flights in official BITRE history — and weather is calmest in Jan. Here’s the full picture before you book.
Reliability score
on-time, cancellations & delays
Weather favorability
year-round climate
Origin-airport operations
What the airline-controlled delay record at PER looks like
Avoided 15+ min controlled delay
across 140,103 flights
Source: BITRE. Origin-grouped, cause-attributed operational history; it is not a direct departure-punctuality measure or a guarantee for any flight.
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Weather by month
When the weather works for you at Perth
A calm-weather score (0–100) for each month from decades of airport observations — how often conditions disrupt flying, not temperature. Higher is calmer.
Calmest month
Calmest flying weather of the year · 99/100 favorability
Roughest month
Most disruptive — low visibility & fog, high winds · 98/100 favorability
The read on PER
What the numbers say about flying through Perth International Airport
Across official performance history, flights from Perth avoided significant airline-controlled delay about 77% of the time over 140,103 flights. That's a respectable but unspectacular operational record. Pair it with a moderate cancellation rate of 2.2%. When a departure does run late, the typical delay is around 0 minutes.
On weather, Perth is an unusually calm-weather airport year-round. January is the calmest stretch for flying, scoring 99 out of 100 for favorable conditions, while August is the most disruptive at 98, driven mainly by low visibility & fog and high winds. The year is relatively steady, so no single month stands out as one to avoid on weather alone.
None of this guarantees your specific flight — it’s the backdrop. To turn it into a booking, score real flights to Perth, read how we weigh it all in how the PlaneSane Score works, and brush up with how to pick a reliable flight and avoiding weather delays.
Common questions about PER
- How reliable is Perth International Airport (PER)?
- Flights from Perth avoided significant airline-controlled delay roughly 77% of the time across 140,103 flights of official history — a respectable but unspectacular operational record. The cancellation rate runs about 2.2%. It's advisory context, not a guarantee for any single flight.
- What is the best month to fly from PER for good weather?
- January has the calmest flying weather at Perth International Airport. August is the most disruptive, mainly from low visibility & fog and high winds.
Planning a trip through Perth?
Score real flights to and from PER on reliability, weather, and connection safety — not just price.