Flights from the UK to the US could take longer due to the changes in the climate, according to a new study.
Global warming is likely to speed up the jet stream, say researchers, and slow down aeroplanes heading for the US.
While eastbound flights from the US will be quicker, roundtrip journeys will “significantly lengthen”.
The University of Reading scientists believe the changes will increase carbon emissions and fuel consumption and potentially raise ticket prices.
The study has been published in the journal Environmental Research Letters.