Scottish MPs have been inundated with more than 3000 e-mails after a campaign for lower air taxes went viral on Twitter and Facebook.
The Fair Tax on Flying campaign is calling on the UK government to undertake research on the costs to the British economy of the UK having the highest air passenger duty (APD) anywhere in the world.
It says a family of four flying economy class from the UK to the US pays £260 in APD, while in France the equivalent tax is £38.
The campaign is urging people to contact their MPs to express their concerns on the issue.
Linlithgow MP Michael Connarty is one of 15 Scots MPs to have backed a motion at Westminster arguing the current level of APD is acting as a deterrent to both inward investment and inbound tourism and voicing concern about its impact on ordinary families and their ability to fly.