A student changed his name by deed poll because it was cheaper than paying a Ryanair fee to correct a booking error.
A mix-up meant Adam Armstrong had been booked to fly to Ibiza under the name of Adam West.
Rather than face a Ryanair admin fee of £220, Mr Armstrong, from Manchester, changed his name free of charge and then obtained a new passport for £103.
Now he and girlfriend India Lomas, 17, will fly to Ibiza as planned next week.
Mr Armstrong told the Sun newspaper that the flight for the couple had been booked by Ms Lomas's stepfather.
He said: "Her stepdad got my name from Facebook but I had put it as Adam West as a joke, because he was the actor who played Batman on TV."
Ryanair told him there was a £110 charge for changing the name, but it would have to be paid twice as Ms Lomas was on the same booking.
Ryanair said a name-change fee is charged to prevent reselling of tickets for profit and the company offers a 24-hour "grace period" to correct minor booking errors.