Air Transat (TSC) on-time performance, September 2026
1,232 scheduled Air Transat departures in US airspace in September 2026, 79.0% of them on time. Measured from FAA departure data, updated every morning.
On time, day by day
Share of Air Transat departures within 15 minutes of schedule, by day. Light bars show each day's departures for context. Worst day: Thursday 3 September at 50.0%. Best: Tuesday 29 September at 97.1%.
Airports, ranked by on-time share
Airports with at least 30 Air Transat departures in the month.
| Airport | Departures | On time | 45+ min late | Avg delay (min) |
|---|---|---|---|---|
| YQB Quebec | 53 | 83.0% | 11.3% | 13.3 |
| YUL Montreal | 580 | 81.6% | 4.8% | 6.8 |
| YYZ Toronto | 432 | 76.2% | 6.2% | 9.7 |
Least punctual routes
Routes with at least 20 Air Transat departures, lowest on-time share first.
| Route | Flights | On time | Avg delay |
|---|---|---|---|
| YYZ to YUL Toronto to Montreal | 24 | 58.3% | 16.4 |
| YYZ to CDG Toronto to Paris | 23 | 65.2% | 12.6 |
| YUL to BOD Montreal to Bordeaux | 23 | 69.6% | 29.9 |
| YUL to FCO Montreal to Rome | 30 | 70.0% | 12.5 |
| YUL to CDG Montreal to Paris | 55 | 70.9% | 14.5 |
| YYZ to LGW Toronto to London | 42 | 71.4% | 13.1 |
| YYZ to LIS Toronto to Lisbon | 21 | 71.4% | 9.8 |
| YUL to LIS Montreal to Lisbon | 25 | 76.0% | 13.4 |
| YYZ to FCO Toronto to Rome | 30 | 76.7% | 20.8 |
| YUL to YYZ Montreal to Toronto | 55 | 78.2% | 12.0 |
Busiest routes
The ten routes Air Transat flew most this month.
| Route | Flights | On time | Avg delay |
|---|---|---|---|
| YUL to YYZ Montreal to Toronto | 55 | 78.2% | 12.0 |
| YUL to CDG Montreal to Paris | 55 | 70.9% | 14.5 |
| YYZ to LGW Toronto to London | 42 | 71.4% | 13.1 |
| YYZ to CUN Toronto to Cancun | 32 | 87.5% | -3.5 |
| YUL to PUJ Montreal to Punta Cana | 32 | 100.0% | -4.6 |
| YUL to FCO Montreal to Rome | 30 | 70.0% | 12.5 |
| YUL to CUN Montreal to Cancun | 30 | 93.3% | 6.8 |
| YYZ to FCO Toronto to Rome | 30 | 76.7% | 20.8 |
| YYZ to PUJ Toronto to Punta Cana | 30 | 96.7% | -4.6 |
| YUL to BCN Montreal to Barcelona | 30 | 100.0% | -9.8 |
Other months for Air Transat
How we measure
On time means the aircraft took off within 15 minutes of its scheduled departure, after subtracting the departure airport's normal taxi time (FAA SWIM reports wheels-off, not push-back, so the median taxi time of the last 30 days is taken off every flight first). Average delay is the mean of that taxi-adjusted delay over all departures; early departures count as negative minutes, so an operator that routinely leaves early can show a negative average. 45+ min late is the share of departures that left 45 minutes or more behind schedule, the point at which most connections are at risk.
Scope: scheduled airlines only, the same set as the monthly State of the Sky report (operators with published routes; private, fractional and charter operators are left out), so the two publications give the same numbers for the same month. Departures are counted by scheduled day (UTC). Each day's flights are rolled up overnight and published the next morning; the newest day keeps filling in for a day or two and is only shown once it is substantially complete. Figures can differ by a few tenths of a point from the State of the Sky report for the same month: that report is frozen on the 2nd of the following month, while these pages are rebuilt from the live rollup, which recomputes each airport's taxi baseline nightly and re-rolls the last week of the month as late departure times arrive (September 2026 at SFO: 16,398 departures in both, 69.2% on time here against 69.5% in the report).
Source: FAA System Wide Information Management (SWIM) flight plans and departure times, processed by PlaneTrack. Free to quote with credit to PlaneTrack (CC BY 4.0).