Region of Waterloo International Airport - YKF

[SammyOES]

I count that as two connections: 

1. (YKF inbound flight) to (KPX*)
   
2. (KPX) to (YYZ outbound flight)
   

as opposed to the just single connection.

And, yes, the train would need to be fairly speedy, frequent and reliable. (EWR to NYC Penn Station is only 12.6 miles -- but 28 minutes.)

* Kitchener-Pearson Xpress!

I think KPX is realistically three segments though. A short ride/train from the physical airport to some train station in Breslau. The main train towards Toronto. Then some other short train (probably what already exists) to get to Pearson proper. I just can't imagine the average waiting time for any of those segments would be < 10-15 minutes.

Edit: Not only is that trip only 12.6 miles, it also only has 2 intermediate stops! I assume there's a lot more congestion getting into Manhattan than we'd have with Toronto, but they also have way more rail lines... so I don't really know how it all evens out - but I think the short answer is that its hard to do all of this quickly.