Originally Posted by MaxVO

Just a side comment on the use of multi-city approach. From my recent experience, these issues happened a lot:
1. Award route availability may not match what you could book as separate trips;
2. Online booking engine may freeze, and not complete the reservation;
3. Taxes and fees will be different from either a trip w/o a long stop, or separate PNR's.

I recently had a 3-stop trip stiched together using this method: first booked whatever segments the online engine allowed, then asked a phone agent to add the remaining segments. There was apparently more than one way to calculate the mileage and fee requirements. The initial quote I received and accepted from the phone agent was actually higher than the final invoice I received a couple days later. ^