Are there nonstop flights from Shannon (SNN) to Toronto (YTZ)?

No. The fastest connection is via Boston, about 7h 17m of total flying time.

What is the fastest connection from Shannon (SNN) to Toronto (YTZ)?

via Boston ≈ 7h 17m, via Newark ≈ 7h 29m, via Chicago ≈ 8h 38m (estimated flying time, excluding layovers).

Shannon Airport (SNN) to Billy Bishop Toronto City Airport (YTZ)・5,108 km

No nonstop flights. The fastest connection is via Boston (BOS), about 7h 17m of flying time (layover not included).

None.

3 one-stop options, sorted by estimated flying time. Tap one to see the airlines on each leg and booking links.

Times are estimated from distance. Check schedules, frequency and availability with the airline or a booking site.