The deal which averted strikes by thousands of workers at six airports includes a 2% pay rise and a lump sum of £500 and will set the standard for agreements in the aviation industry, union leaders have said.
Unite said a new offer by BAA was double the original deal proposed by the airport operator - rejected last week, raising the threat of walkouts at some of the country's busiest airports.
If the strike had gone ahead, it would have caused travel chaos for hundreds of thousands of holidaymakers.
Firefighters, engineers and security staff at Heathrow, Stansted, Southampton, Glasgow, Edinburgh and Aberdeen airports will now be urged to accept the new deal in a ballot over the next three weeks.
Unite said the new offer, tabled by BAA during lengthy talks at the conciliation service Acas on Monday, would now set the standard for pay deals in the industry.
The offer includes a 2% increase on basic pay and allowances from last January, arrangements for shift pay during periods of sickness to remain unchanged, and a lump sum of £500, with £200 paid next month and the remainder next March.
Unite said the lump sum could reach £900 if performance targets are met.
National officers Brian Boyd and Brendan Gold said: "This offer is double what BAA had originally offered with no strings attached. Plus it comes with a guaranteed lump sum of £500. The negotiations were tough but Unite has delivered a fair offer for BAA staff.
"The game is up for employers in the aviation industry. With the recession receding in the industry, Unite now expects BAA's pay offer to set the standard."
A BAA spokesman said: "We believe this is a fair offer for staff in what remains a difficult economic environment for the aviation industry. All parties brought a constructive approach to negotiations and we are sorry for the uncertainty ahead of yesterday's discussions."
