The European Union is to suspend rules that require airlines flying to and from airports in the EU to pay for their carbon emissions.
The rules were unpopular with countries outside Europe such as the United States, China and India.
Climate Commissioner Connie Hedegaard said the suspension was due to progress being made in negotiations on a global emissions deal.
But she added that if the International Civil Aviation Organization did not make progress towards a global deal by this time next year, a European tax would be reintroduced.
The EU brought in an Emissions Trading Scheme on 1 January. India banned its airlines from complying with the ETS in April.