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.
The mother of missing Corrie McKeague says it's "back to the beginning" after a search for her son in a landfill site drew a blank.
Police have recently finished searching a landfill site for his body and say they are 'content' Corrie is not there.
The mother of missing RAF Serviceman Corrie McKeague says she "now knows" that her son is not in a Cambridgeshire landfill.