ABTA is estimating that 2.2 million Brits are set to head overseas this bank holiday weekend.
Members are reporting strong sales with the Balearic Islands, mainland Spain, Greece and Florida leading the way.
Turkey has seen spectacular growth this summer and holidaymakers travelling out over the weekend will not only benefit from extremely good value holiday prices but also a weak local currency where your pound will get you almost twice as many Turkish liras than this time last year.
At the same time, VisitEngland predicts more than seven million Brits will be holidaying in the UK.
ABTA added that city breaks are a good option for the long weekend and Barcelona, Dublin, Prague, Paris and Amsterdam are the most popular choices.
Airports around the country will be very busy with hundreds of thousands flying out from Heathrow, 308,000 from Gatwick, 192,000 from Stansted and 108,000 from Luton.
Regional airports will also be busy with 220,000 departing from Manchester, 58,000 from Bristol Airport, 98,000 will depart from Edinburgh, 77,000 from East Midlands Airport and 13,000 from Southend.
Hundreds of thousands will also be travelling through the Ports and the Channel Tunnel.
Mark Tanzer, ABTA chief executive, said: “The August bank holiday is one of the busiest of the year as we near the end of the summer and the school holidays.
“Temperatures around the Mediterranean are no longer at the record-breaking temperatures we saw last month and sunshine is virtually guaranteed.
“Many people will also be making the most of what the UK has to offer, taking weekends away or longer holidays to our coasts and countryside.
“As always at busy times of year for travel, if you are driving leave a little extra time to get to your place of departure and if using public transport check in advance for engineering works.”