Originally Posted by pedro
Regardless of whether or not they are "required" to accommodate you on another airline there is always the possibility that they will and it's not that uncommon. I've had it happen to me a couple of times. Airlines are running pretty tight capacity right now and when a full flight gets canceled placing 200 some passengers on their own airlines subsequent flights is often difficult. OTOH, if you are on a flight that is almost empty and it gets "canceled" you're basically at their mercy, and most of the time you're going to end up having to wait.
Very true. When my flights have been canceled, I've usually been put on a flight with another carrier without citing some special rule. I always figured it was a fairly common courtesy, but not one that is required. The one carrier that has never put me on another carrier is Southwest.