TS421 TorontoYYZ · 16:00 MontréalYUL · 17:20
TS421 by Air Transat flies from Toronto (YYZ) to Montréal (YUL) for the Tue, Oct 13 departure.
arrived at YUL · 8 min late
The route today
live boardsWeather lens
Weather-conditioned outlook for this flight right now
Measured, 90-day sampleDriven mainly by YYZ (Toronto), currently flying MVFR (marginal visual). For this route and airline, under conditions like today's, over the last 90 days.
Pro Flight Search tracking, 90 days · the weather × delay correlation study → · live weather risk by airport →
When it flies
scheduled departuresEach mark is a scheduled departure at its origin-local time. Today is highlighted.
Other Toronto to Montréal flights today
same route · Air TransatIf TS421 is cancelled, these are the other Air Transat nonstop flights from Toronto to Montréal on the same day, with scheduled departure times in YYZ local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How TS421 actually runs
Pro Flight Search has tracked every published board update for TS421 across the YYZ and YUL boards: schedule changes, gate pushes and actual clocks. Early read — pattern not clear yet. Only 2 completed legs so far: left noticeably late (~41 min) but landed a little late (~17 min). Not enough to call it.
The verdict above is that record speaking, so it reflects how TS421 operates rather than what the timetable promises. Numbers refresh as new flights operate.
How this operation is measured
Board log
scheduled → actual, per operationAircraft
Recent tails: C-GUBA.
Board clocks recorded as YYZ and YUL published them.
Planning around TS421? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — TS421 Toronto to Montréal on-time performance, measured from the YYZ and YUL airport boards.
https://proflightsearch.com/flight/TS421
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