Originally Posted by
emma dog
If you bought your ticket through Orbitz as From: OKC TO: GRU and it all appeared as one giant ticket, then it's all linked... your ticket is for carriage from OKC to GRU and v/v. If you bought them as IGU-GRU (1 ticket) and GRU-OKC, then that's 2 tickets and you're potentially hosed if TAM is late, but YMMV as far as "how hosed".
OK, so it's definitely better "insurance" for a situation like this to book multi-city flights all at once on a site like Orbitz, instead of buying a separate flight (on a different airline like TAM) for a side trip like GRU-IGU-GRU?