Consumer watchdog Which? has condemned plans by Lufthansa and subsidiary Swiss to start charging credit and debit card fees.
The airlines are to impose a charge of £4.50 on all payment card bookings from November 2.
Which? executive director Richard Lloyd said: “It’s unbelievable that two airlines have introduced these card fees just weeks after the Office of Fair Trading agreed with us that they are unfair and misleading.”
He repeated calls on changes to be made to the European payment services directive to “put an end to debit card surcharges for good”.
Which? issued a super complaint over excessive card fees in March, resulting in the OFT stating in June that surcharges are “misleading and detrimental” to consumers.
It recommended that the Government introduce measures to prohibit retailers from imposing surcharges for payments made by debit cards.
Lloyd said: “The Treasury must act quickly to do this before other airlines and businesses jump on the bandwagon and start charging these excessive fees.”