Without doubt the worst flight I've ever been on (no fault of the airline I should add!) was on a small prop plane from Stockholm to some tiny town in the middle of Sweden.
We had to stop off halfway to drop a few passengers off and pick a few more up. We had horrific turbulence on landing as it was blizzard conditions, I was certain we were going to crash, genuinely thought that was it.
Thankfully landed safely, but just to top the experience off the plane's de-icer packed in while grounded so had to wait 2 hours for a bus then have a 2 or 3 hour bus journey in this blizzard. Lovely.