Upgrades might be available for Lufthansacodeshare flightswith a United flight number. Make a request at 1-800-UNITED-1 within the U.S. and Canada. For outside the U.S. and Canada, call your localUnited Customer Contact Center. Upgrade requests are only valid on Lufthansa-operated flights....
Exactly which tickets you can upgrade will vary from airline to airline, though there are a few overarching commonalities in terms of what tickets can't be upgraded using miles. The first exclusion is award tickets — all three US legacy carriers (Delta, American and United) do not allow mil...