Delta Air Lines has started selling its new upgraded economy product on transatlantic flights for a supplement of $80 to $140 (£50-£99) each way.
Diamond and platinum members of the airline’s frequent flyer programme plus those who buy full fare economy tickets will get the upgrade for free and gold and silver members will be offered the seats at a discount.
The "economy comfort" seats are roomier than standard economy with a 50% greater recline and four-inches more legroom.
The new seats will be at the front of the economy cabin, passengers paying the supplement will be the first to board and they will be served complimentary alcoholic drinks.
Special covers will be placed on the "economy comfort" seats, but the inflight service will remain the same as standard economy. Flights featuring the new seats will start next month.
Delta said it had created space for the additional seats by removing a row or two of economy seating from its aircraft.
