<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by Euroboy:
This could be interesting - I have a SEA->IAD->DCA->ORD->MSP->ORD->DCA->SEA trup coming up. How many roundtrips will this be? ;-) I guess you can't have 2 roundtrips on the same PNR.
If the two one-way fares rule is enforced I guess RTW fares does not count either....:-(</font>
Be careful with the "circle trip" rule. As long as you only transit the cities between SEA and MSP (both directions) then this will be one round trip. If you stop anywhere along the way, the whole trip ceases to be a "round-trip". This was part of the T&C for last years Fly 3-1 Free promotion, but does not seem to be included in the current Fly 3 promotion.
This itinerary would never be more than one round trip if it is on one PNR.