Thanks for the help! We are travelling on L fares for Turkey Day trip, so no go there. However, we are on K fare for Christmastime, so will be trying to upgrade there. We are flying out of TPA on the way to DCA, and then the return will be from LGA to TPA (there is a DL Shuttle flight DCA-LGA in there, but no first class on those). We will try to get the upgrades on those flights.