i would rather consider PIT-ORD-MAD-TLS on AA/IB
They used to have , and still i think, the MAD-TLS


1) you skip the LHR-LGW transfer
2)you skip LHR full stop: stack over heathrow, long queues at immigration,shops racket, BAA ineficciency...
3) IB Y is as bad as AA y: but at least you get free booze
4) Barajas is a very nice piece of airport architecture. Not very well planned IMHO but far better than LHR
5) MAD-TLS is operated by AIr Nostrum which is the very fine regional carrier from IB. The difference in product quality is amazing between both
6) Last but not least, you can enjoy spanish "jamon" in Madrid which is always nice ....