I need to go to Toronto for work later this year, and in searching flights I found a great money-saving combination (my company is pretty tight on travel budgets) that would invlove buying 2 tickets: Flying to IAD on DL, then taking Porter into YTZ. The connection times look really easy -- 2 hours at IAD on the outbound, about 3 hours on the return. The flights out of YTZ will require clearing US customs/FIS at IAD correct? 3 hours seems like more than enough time, but it would be arriving at 14:55, which seems like the time when inbound flights from Europe might be arriving.
Anybody have any wisdom to share? Is it just a bad idea to buy the split tickets at all? I'd love to give PD and YTZ a try--I've never logged either of them.