I hope someone here can answer my question and hopefully ease my worries. I'm flying back home from Dublin to Dallas, TX by way of London Heathrow. I will be flying in from Dublin on Aer Lingus landing (presumably) in Terminal 1 at 1:25PM. My flight from London to Dallas is (presumably) leaving from Terminal 3 at 3:00PM on American Airlines. The layover is a VERY short 1 hour and 35 minutes. From what I'm reading on Heathrow's site, I need to allow 75 minutes transfer time between terminals. I'm a VERY neurotic person when it comes to time so I am freaking out slightly (ok....A LOT) about how close this will be. Is this a doable connection? Also, I cannot tell for certain, I see I will have to reclear security, but will I need to do customs?
ANY help and possible neurosis easing would be greatly appreciated! Thanks so much!