Originally Posted by
Austinrunner
If both flights are booked on the same PNR, then per the U.S. Department of Transportation, your baggage allowance for the first flight also applies to the second flight.
Are you sure it applies to the return flight? I thought it just applied to connecting flights.
Edit: Well, after reading it does seem to say the fees at the beginning apply at the end.
However, if the class of service changes that would make this sound odd. That would mean you would have to pay the fees both ways, if flying economy outbound and First Class on the return.