Brisbane to Sydney Flights:
On-Time Performance & Reliability

Brisbane–Sydney: Exactly on the national average, with a Jetstar gap that should settle the airline question

Brisbane–Sydney lands at 76.7% on-time in 2025 — precisely the national average, a 3.4% cancellation rate that is unremarkable annually and severe in July, and a recovery from 68.9% in 2022 that has been the most consistent of any major route on the network. Four straight years of improvement, each year better than the last. The aggregate is the least interesting thing about this route. The airline split tells a clearer story: a 13.8-point gap between Qantas and Jetstar on one of the country's highest-frequency corridors, and a November that is the worst on-time month by a margin that should inform any time-critical travel decision.

Why July cancels and November delays

The seasonal pattern here mirrors Adelaide–Sydney closely, but with Brisbane-specific drivers. July's 11.6% cancellation rate is generated at both ends of the route: Brisbane river valley fog shutting down morning operations, and Sydney's slot-constrained recovery window leaving no room to reabsorb disrupted inbounds. The sectors that cancel in the morning bank don't come back — they simply disappear from the schedule. November and December make the avoid list for different reasons. November at 65.9% is a delay story, not a cancellation story: spring convective weather over southeast Queensland generates afternoon thunderstorm activity that pushes departures late, and Sydney's end-of-year corporate demand means there is no slack in the system to recover. December adds the Christmas demand surge on top of the same weather pattern. The combination of full loads, constrained slots, and summer storm season makes December the month where a delayed departure is most likely to become a significantly delayed arrival.

When to fly

February at 80.3% is the standout — the only month that clears 80% on this route, and 14.4 points clear of November's low. March and April are the next best options, sitting in a stable post-summer band before the winter cancellation window opens. The risk calendar for BNE–SYD is relatively simple: February through April is low risk, July is cancellation risk, and November through December is delay risk. If the trip has a hard constraint at the Sydney end — a connection, a morning meeting — avoid afternoon departures from Brisbane in November and December regardless of which carrier you're on. The convective weather doesn't discriminate by airline.

Airline reality check

Qantas at 81.6% is running its second-strongest result across the routes we track, just behind its Brisbane–Melbourne number. Virgin at 75.4% is solid — 1.3 points above the national average and a reasonable choice when Qantas fares don't make sense. Jetstar at 67.8% is 13.8 points behind Qantas and 7.6 behind Virgin on the same route. This is the widest three-carrier spread of any route covered so far, and it matters on BNE–SYD specifically because the route's frequency creates an illusion of recovery options that don't always exist. With Sydney slot constraints, a missed Jetstar departure doesn't automatically mean a seat on the next service — it may mean a same-carrier rebooking hours later. The frequency that makes this corridor feel forgiving is concentrated in peak banks, not spread evenly through the day. For a leisure trip with flexibility, Jetstar's price difference may be worth it. For anything else, the 13.8-point gap is the answer to the airline question.