Thanks for the clarification. The service I used indicated that the reservation could be cancelled with 48 hours notice, so I think I'll do that and re-book directly with Aerocity -- I'd rather spend the extra 9 euros on more bocadillos de calamares - yum, yum!! To answer your question MM, I found that site while investigating various hotels and tours, it was a link from one of the hotel sites I think. But I have to admit that none of the sites I've looked at have been near as informative or helpful as yours! Muchas gracias.