Originally Posted by
SAT Lawyer
In one instance, at my request, I was re-routed from DL metal onto DL-coded, NW-operated flight segments, and this was a couple of years ago, before the merger.
There are some circumstances where the Feds have stepped in. Change of carrier is one. Change from non-stop to direct or connection is another. In these situations there should be no minimum time change demanded by Delta (or any other airline operating from the U.S.A.) to refund a ticket w/o fee.