Originally Posted by
alp67
Sure, you can. But you can't, if a ticket on UA ticket stock is what you're after.
Connections within the US seem not to be possible as price will jump to € 10'k
I got connections through EWR both ways for 2800 EUR. Booked on LH, booked as a multi flight. First worked out which connections had the right fare on ITA Matrix, then went over to LH or LX and put it in, and bingo, it popped out.