Originally Posted by
world_fly
What do you mean by a different airline? It's TRANS STATES AIRLINES DBA UNITED EXPRESS which is the same operator for the original flight and now the new flight.
No, the new flight is operated by GOJET AIRLINES DBA UNITED EXPRESS (G7). Even if G7 owns AX, the flight would still be operated under a different AOC.
New text has now been added to the UA flight status, and it seems the records of the canceled and the replacement flights have been fully merged, so it looks like everyone will just transfer over to the new flight:
Status: We want you to know that because of a change in our operations, your original flight (UA 4709) from Wichita to Denver on Jan 10 has been renumbered to UA 3372. This change will not affect your existing reservation. Your estimated departure time is 05:38 PM, arriving in Denver at 06:20 PM.
I agree they shouldn't have sent you an unnecessary cancelation e-mail though.