<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by Punki:
Thanks. Too bad that they make it so difficult. For our tickets to ZRH, we were able to buy an upgradeale ticket SEA/LHR for $325.00 RT and then add on separate tickets LHR/ZRH for $100.00 RT. The same trip on one itinerary would have been $1,000.00 more.
The agent who sold me the tickets was really funny. She said just write yourself a check for $1,000.00 and then look at it and gloat every time having two itineraries inconveniences you. 
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Did you get your tickets to London a month or so ago when Lon was on sale? And then add on Zrh?
Is this for the summer like you were asking in your original post?
Did you go thru a local TA?
I've got a friend who wants to take his wife to both ZRH and Dusseldorf this July. Also, Ex-SEA. I warned him it would be more economical to go during winter. But, he'd be happy if he could duplicate your fares to ZRH!
thanks