LHR - T2

[reynoldsno1]

It's been a long while, but - making a side trip to LHR T2 from VIE end of Apr/start of May. Time is tight and I'm departing/arriving by hire car. STD LHR-VIE on a Sunday is 1250 - I have check-in luggage - what is a reasonable time to arrive at the hire car drop-off and do all the proper check-in and security stuff.
If someone says 4 hrs prior to take-off, I will hunt you down and kill you without mercy.....:D (and leave the weapon by your body, of course, for security purposes...)

[IB4138]

Try 3 hours 59 minutes and 59 seconds to be safe!

It all depends on which car hire company you use and how quick they are at checking your car back in ; then is the courtesy bus immediately available to the terminal;finally is the tunnel congested.
Have found this part of the journey can take anything from 30 mins to one hour.