A student discovered it was cheaper to fly from Newcastle to London via Menorca than to take the train.
When Joe Furness, 21, decided on a last-minute trip to see friends, the lowest rail fare he found was £78.50.
But after an internet search the trainee marine officer found the same journey, including a 12-hour stopover on the Spanish island, for £26.98.
He said it showed train travel in the UK had become "ridiculously expensive".
Mr Furness, from Oldham, is a trainee cadet with shipping firm Maersk and is studying at South Shields Marine College.
As well as the flights, he also spent £7.50 on a hire car, which he slept in, and splashed out on a £4 cocktail - meaning his entire trip was £40 cheaper than taking the train.
The cost of Joe's trip
Newcastle to London = £78.50
Newcastle to Menorca = £15.99
Menorca to London = £10.99
Car hire = £7.50
Cocktail = £4
Total = £38.48
Mr Furness admitted the trip was "no good for anyone who needs to do a commute".
"But it does show how cheap it can be to travel and have a bit of fun at the same time," he added.
"I had a great time, saw a festival, drove around the island for a bit and met loads of people.
"Trains in the UK have become ridiculously expensive. I've never once got on a train and got off at the other end thinking I've had value for money."
Mr Furness made a video of his trip, which took a total of 22 hours and consisted of a flight out of Newcastle to Menorca with Thomas Cook on 23 June for £15.99.
His return flight to London Gatwick the next day cost £10.99 with the same airline.