Originally Posted by
windowontheAside
Have you checked prices for going out from Inverness and back to London? Sometimes that's not much different from returning to INV and it's a lot cleaner.
This.
I wish more people at least checked the prices of doing this option.
The savings will likely not be as great as a 'full' start / end in INV but still not as costly as the direct ex LHR flight so it's a balance. Want the full savings (and TPs) then you put up with the full inconvenience.
Another option is to book the final LHR-INV and the return for the day or two after you land so you get your luggage back at LHR.