Four airlines from the UK and Irish Republic are calling for the UK government to scrap Air Passenger Duty.
The tax, which is applied to almost every ticket on a flight originating in the UK, has risen sharply since it was introduced in 1994.
When APD was introduced, passengers whose journey originated in the UK paid between £5 and £40 per ticket. They now have to pay from £24 to £170.
It is opposed by Easyjet, Ryanair, Virgin Atlantic and British Airways.
