In reply to genericflipper: But if you (over)fill a Mutant 38 to capacity it doesn't fit in an overhead locker. True story. Easyjet didn't seem to care too much though as it was an empty flight and it could fit in sideways.
In reply to genericflipper: Used a Berghaus Arete 45 for 7 or 8 trips to Alps, Pyrenees, Tatra & Winter climbing in Greece, all on budget airlines. Fits template fine & folds up into your big sack when you're backpacking with it.