ABTA, the travel trade association for tour operators, is estimating that 1.7 million British holidaymakers will head overseas for the Easter weekend.
Spain, Egypt and Tunisia are the most favoured destinations as travelers chase the sun.
Some 600,000 are expected to leave from Heathrow, 214,000 from Gatwick, 110,000 from Stansted and 55,000 from Luton.
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The M20 in Kent has been closed in both directions after a pedestrian bridge allegedly collapsed on the motorway on Saturday.
The AA have warned of traffic jams and urged people to carry extra water in their vehicles because of the warm weather.
Chefs in Italy are urging restaurants around the world to serve pasta all'amatriciana - a rustic dish that originates from Amatrice.