After searching through the forum, I think we'll be alright, but I wanted to ask in case anyone had suggestions or concerns. We are flying into LHR from Paris and are then flying from LHR to the USA 3.5 hours later. We have two separate tickets, so our bags won't get checked through, and we have to get from Terminal 4 to Terminal 3.
It looks like the minimum recommended time (from Heathrow website) is 90 minutes, so I'm figuring that even with the extra hassle of getting our luggage and going through Customs and then checking our luggage back in we should be able to check in maybe 2-2.5 hours after landing. Does this sound right? Or like enough time?
If (hopefully worst case) it takes 2.5 hours from landing to the check-in counter (customs + transit + lines) will they still let us check in 1 hour before takeoff? We're on British Airways.