Police investigating the disappearance of Corrie McKeague are to resume their search of a landfill site on Monday, October 23.
A spokesman for Suffolk's Major Investigation Team said the extended search would last for four to six weeks.
It will concentrate on part of an area known as "cell 22", a 10,000 sq m cell of the landfill at Milton in Cambridgeshire which is next to the original site of the search.
The renewed search will cover 1,831 cubic metres.
"Careful re-checking of the data available to the Major Investigation Team has concluded the area of the original 20-week search is still the location where there was the highest likelihood of finding Corrie.
"However, the nature of waste disposal and its movement is not a precise science, hence the requirement to extend the search."
Mr McKeague, who served with the RAF at Honington, disappeared in September 2016 following a night out in Bury St Edmunds.
Police fear he may have climbed into a bin in the Horseshoe area of the town which was later collected and the waste taken to Milton.
Police investigating the disappearance of RAF gunner Corrie McKeague have "explored all reasonable lines of inquiry", a review has found.
The mother of missing RAF gunner Corrie McKeague is in the Suffolk town of Bury St Edmunds to retrace her son's last known steps
A year after Corrie went missing, Suffolk Police have told ITV News Anglia that their investigation has been "thorough" and "meticulous."