Originally Posted by
PAX_fips
An alternative is to fly to Montreal. The ViaRail route is about 2-2.5h.
(Sidenote: free bus shuttle from airport to station .. ~5min transfer. But stay at airport as long as possible, the "lounge" at the station is a laughing stock

)
Two important fact checks:
- VIA Rail is 1.5 h from Dorval to Ottawa.. I did it last month, in fact:
- While I agree there are more amenities @ YUL, the shuttle bus does not run on a fixed schedule. So relying on it for a tight cnx. could be problematic. On my trip in September, I ended up taking a ghost cab to the VIA Rail Station - cost me $17 and then the train was late! (which it is tonight BTW)..
The other option is, of course, flying to the US and transting IAD or EWR.