I am trying to redeem my united miles for a r/t economy class flight to europe (from hawaii). When I get on the united web site I can find a number of legs at the economy rate but not all of them. This is when I try to do a r/t trip from hnl to europe with a stopover in DC (hnl-iad, iad-lhr and cdg-hnl). On the web I am able to book the whole trip but for one leg I will have to use more miles. I was wondering, if I call united mileage plus reservations do they allow more flexibility and have more economy class seats that can be used when I redeem my miles (versus using their web site)? many of the legs have a lot of open seats (some flights are over 60% empty in economy class for travel 6 weeks from now) so not sure why they don't allow mileage customers to use their miles. What is strange is that if I check out my trip leg by leg on the web site I can find redeemable economy class seats and flights for all so I don't understand why I can't just put them all together to make one r/t trip. I thought that maybe calling ual with the legs might allow me to get the whole trip using economy miles. I know that I may have to pay $25 to have them assist me but that is a drop in the bucket compared to having to use another 30k miles (almost another r/t flight). I tried to google and use tripadvisor on this but I couldn't find any information so thought I would ask the board if anyone could give me info. I redeemed my miles on the web before with no problems but this time I just can't seem to get all the legs at the economy rate. Any assistance is appreciated! Thanks in advance!