There was a three-part series following an Air Canada 767 from YYZ to FRA which first aired last year on Discovery (CA). It was very professionally done, and featured every aspect of the trip i.e. ATC, flight crew preparations, maintenance, etc.
As for Airport, as someone previously mentioned: some episodes are fantastic, whilst some new ones (Series VI) could take place in a shopping complex and no one would tell the difference.
Cheers,
klik (back after a while)