Thanks for showing me the multi-city screen. When I use this screen the price seems to end up much higher. It seems like it's automatically pricing plus fares for all legs and not giving me options for economy.
departing June 24 from IAD and plan to be in Rome by June25
Depart from Venice on 7/5 and land at LHR
Depart LHR on 7/6 and return to IAD

When I book a RT from IAD -LHR 6/24-7/6 and then use multi-city from LHR-ROM 6/25 and VCE-LHR on 7/5 I can get the price to about 4K. If you can get lower or similar without me having to pick up bags at LHR and reboard please let me know. Thanks again.