But Ryanair looks like it's going to carry on with its charges - after finding a loophole.
The move prompted Monarch to make a pre-emptive strike and abolish all charges for using a debit card. It did, however, increase its credit card charge at the same time, so it's not all plain sailing for customers.
Meanwhile Ryanair said the OFT's ruling wouldn't affect what Ryanair customers pay, because they aren't charged a fee for using a card - it's an 'administration fee'. Ryanair says that the fee is designed to pay the costs associated with the booking system. However, this administration cost is apparently £6 per person per flight if you pay by card and nothing if you use a Mastercard prepay card.
It's fairly certain that the OFT and Ryanair are doing to come to blows over this argument. Low cost airlines were specifically mentioned in the super-complaint that promoted the OFT ruling, so its not going to like any moves to get around the ruling.
So what can you do about it?
If you're dead keen to fly Ryanair and want to avoid the extra fees you can get hold of a pre-pay card and dodge the fees. Alternatively, some people may prefer to bite the bullet and pay the fees in order to use a credit card. As long as the tickets cost more than £100, this gives them additional rights in the event a flight is cancelled or the airlines goes under, as they can claim the money back from their credit card company.
Whatever your approach, it pays to shop around and factor in all the fees before booking a flight.
But what do you think? Are these fees a small price to pay for cheap tickets, or do they leave you feeling ripped off? Let us know in the comments.