Flying over Nazca lines is my long child dream. Hotel offered me 90USD/person with free transportation. Price was acceptable, but I decided to go directly to the airport, cause I don't want to wait at the hotel too long. Once reaching the tiny airport, there're couple of airlines counter there. Most airlines offered 80USD/person, but I have to wait for others, so chose to fly with Air Mojoro. My price was $90/person and I could fly right away, cause they have a small plane for my group - 4 people.
To fly & to see: You have to prepare yourself quite well, cause you may have motion sickness from the flight. Before flying co-pilot handed me a paper of route map saying that he will inform us, once reaching each line. To tell the truth, the lines are not as clear as you saw in postcards.. If he didn't tell us, we would never knew. But don't worry, you'll see the lines anyway.
The observation tower: It cose only 2 soles and there're only 2 lines you can obviously see.
It's amazing. Nazca lines are very gigantic. I was so wondering how they made it. Personally, I think it's more amaze than Machu Picchu.