Originally Posted by
737aviator
Certainly legally possible for a round trip I imagine, as it'd be a similar duty period to many 'Northern Europe - Canary Island' duties. The St. Johns-DUB rotation is even shorter.
To the best of my knowledge there is a crew change at Dublin. That service routes YYZ-YYT-DUB and return, of course. Typically the time in the air YYT-DUB-YYT totals close to nine hours, with a 90-minute turnaround at Dublin in between.