Sydney to Canberra Flights:
On-Time Performance & Reliability

Sydney–Canberra: The network's second-highest cancellation rate — and the same QantasLink problem, in the opposite direction

Sydney–Canberra sits at 78.0% on-time in 2025 — above the national average, no Jetstar, and a carrier mix that should in theory produce strong results. It doesn't, for one reason: a 5.6% cancellation rate that is the second highest on the domestic network behind its mirror route, and a QantasLink number that is dragging an otherwise strong aggregate down by a significant margin. The trend line adds a wrinkle that no other route in the dataset shares: SYD–CBR peaked at 80.3% in 2024 and has regressed to 78.0% in 2025 — one of only two routes showing a year-on-year decline, and the sharper of the two.

12.1% Cancellation rate on SYD–CBR in July — more than one in eight scheduled sectors does not operate. On a route with no Jetstar and two carriers posting results above 83%, the cancellation number is entirely a Canberra Airport and QantasLink story.

Why the cancellation rate is structural, not operational

Sydney–Canberra's 5.6% cancellation rate is not an airline execution problem — Qantas at 87.1% and Virgin at 83.3% are among the strongest results either carrier posts across the network. The cancellations are concentrated in QantasLink's operations and driven by Canberra Airport's physical characteristics: the frost hollow elevation, radiation fog in winter mornings, and instrument minima that ground aircraft with regularity. When a QantasLink rotation cancels at Canberra, the recovery path is the same as on the mirror route — there isn't one. No spare aircraft in Canberra, no parallel runway, and Sydney's slot constraints mean the next available window may be hours away. July's 12.1% is the peak of this pattern, with June on the avoid list for the same reasons at slightly lower severity. The 5.6% annual average reflects year-round fog vulnerability at Canberra that doesn't disappear outside winter — it moderates, but it doesn't resolve.

The regression from 2024 — and what it means

SYD–CBR's pullback from 80.3% in 2024 to 78.0% in 2025 is the most significant year-on-year regression in the dataset. The mirror route, CBR–SYD, showed a similar pattern. Two consecutive data points suggesting the same directional move on both directions of the same route points to something structural rather than statistical noise: either a scheduling change that reduced buffer, a fleet reallocation within QantasLink's Canberra operation, or the route approaching a ceiling imposed by Canberra Airport's inherent constraints. The 2022-to-2024 recovery of 9.1 points was real — but the 2.3-point pullback in 2025 suggests the easy gains have been made and the remaining performance gap is structural rather than operational. July at 72.3% is the worst month, which is notably different from most routes where November leads the avoid list — Canberra's winter fog dominates the risk profile more decisively than spring convective weather does.

Airline reality check

Qantas at 87.1% and Virgin at 83.3% are both exceptional — among the strongest results either carrier posts on any route in the dataset, and 3.8 points apart in a band where the difference is not operationally meaningful. The choice between them on SYD–CBR is a fare question. QantasLink at 73.3% sits 13.8 points behind Qantas mainline — an identical gap to the one seen on Melbourne–Hobart, and consistent with the pattern that has now appeared on four separate routes. The QantasLink underperformance story is no longer a route-specific finding; it is a carrier-level pattern in this dataset. For SYD–CBR specifically, the practical implication is clear: if your itinerary shows QantasLink equipment, the cancellation risk is materially higher than the route's headline number suggests. Qantas mainline or Virgin on this route is not a preference — it is the difference between an 87% and a 73% on-time record on a sector where a missed departure means waiting for the next Canberra slot, not flagging a cab to the next terminal.