Originally Posted by
AZjohns
Yea, the shuttle is not really what I would call "airside" for the simple fact you will still need to clear security (and you would need to do this even if it's T1-to-T1).
It's really hit or miss with the lines at this spot. I have cleared it in 5 minutes and other times 30+ minutes.
And then the issue is how far of a walk is it in T1 to your gate???
As my on personal rule, T1-to-T1 connections must be = or > 1:20 for me. T-4-to-T1 is 2:00. But, as I said you really never know.
The biggest risk is definitely with the lines in my book. Have had the same type of experience here, though mostly it's been quick in T1 (with both T1 and T4 typically much quicker than T3 or T5), but occasionally has been longer.
LHR transit would be a whole 'nother world if the brits took the same step many other EU countries took a couple of years ago and stopped requiring security checks on all arriving flights. Unlike FRA they have excellent infrastructure for terminal-to-terminal connections and minus the security it would be a breeze.