Hi Everyone,

First time redeeming miles through MileagePlus, booked a trip for my significant other and I to CPH. Both segments of the one-way flight are in J and are operated by LH (connecting in Frankfurt). From everything that I have read, I know that I cannot select my seats online through UA's site. However, can I call LH with the UA provided record locator? Or do I need to call United to ask for the Lufthansa record locator first?

Thanks in advance for your help!