You might want to consider what we are doing and start your RTW from Spain. We are buying a seperate RT TPA-MAD to start and end the RTW (~$800 for coach and upgrading with milage to business) . Our trip is then MAD-SCL-IPC-SYD-ADL-PER-DPS-SIN-BKK-LHR-WAW-BUD-MAD This business class fare is ~$3500 (4 continents). This total price (~$4300)is much less than starting from either the USA or Canada which requires 5 continents for the trip.