The Conservatives have unveiled plans for environmental air taxes, including levying VAT on domestic flights and a "per flight" tax based on carbon emissions.
BBC News asked passengers at Manchester Airport what they thought of the proposals.
RICHARD AND HANNAH GRIFFIN
Hannah Griffin said people have to reduce their carbon footprints
Richard Griffin said: "It'll impact on us because we go away more than once a year. If they are going to raise the tax, why not just raise the tax on the air fuel?
"Then everyone can pay - especially if they've got their own private jet."
Hannah Griffin said: "It'll make the family holidays more expensive but I guess we have to reduce the footprint that we make.
"If we are going to prevent a long-term impact on the environment, then that might be the only way to prevent people causing damage."
STEVE THOMSON, BUSINESSMAN TRAVELLING TO AUSTRALIA
Steve Thomson said he would not be happy at paying a new tax
"I haven't read the plans, but I'm going to Australia today so that would virtually wipe out all my allowances, wouldn't it?
"Would that mean that if I were going on holiday, I'd have to pay extra? In that case, I wouldn't be very happy.
"Any extra cost of this trip would obviously be picked up by the company - and they wouldn't be too happy about it either.
"There are other ways of doing business meetings - tele-conferencing, video-conferencing - but people still like to go and talk face-to-face."
PATRICK AND TRACY ATKINSON, TRAVELLING TO PAPHOS, CYPRUS
Patrick Atkinson said: "It's not going to stop us from flying. If they only put £10 on it, then that's nothing these days.
"The only way it would work is to make the cost of the flight very expensive - like double the price."
Tracy Atkinson said: "I suppose those who fly regularly, it will hit them more. But for us, it's not going to stop us from flying. For businesses and companies, it'll probably affect them more, I'd say."
MICHAEL AND JEAN GATHERGOOD, TRAVELLING TO LANZAROTE
Michael Gathergood said: "If you put a tax on and use it to improve the environment, that's fine. But that's not how the tax system works in this country.
"The Exchequer is a black hole. There's no relationship between what goes in and what comes out."
Jean Gathergood said: "It depends what they are going to do with the extra money. If they put it to improving things, making things more eco-friendly, that's fine.
"But I'm not convinced that's the case. They are now saying if you go on a cruise, the emissions they give out are more than aircraft."