Originally Posted by DanTravels

Being required to go through immigration, baggage claim and customs, then back through security, to catch a connecting flight on a partner airline.

I know you're all going to think I'm talking about every airport in the US, but actually this happened in Edinburgh!

When Continental had its non-stop from Newark, I had a connecting flight on KLM, which was a separate itinerary as I figured I'd be staying airside and could just get my boarding pass from the lounge or a gate agent... nope, I had to go through the whole routine. Of course, anyone familiar with waits for baggage at Edinburgh will know I missed the flight. Fortunately, KLM was very understanding and put me on the next one, no questions asked.