The 11-night is a once-a-year cruise that visits special ports. It is sought after, so it gets booked early and the prices go way up because of that. The same is true of all the once-a-year longer cruises, like the Iceland or the British Isles cruises.Makes sense thanks. I actually looked into an 11 night cruise for next year and for the 3 of us it would have been over $11,000. But a 7 night was only a bit over $5000. Rather do a back to back then spend $11,000 on an 11 night. I don't like their math.