The family of Private Seán Rooney have been reunited with his remains.
The Aer Corps jet bringing his body home from Beirut landed at Casement Aerodrome in Baldonnell just after 8.30 am.
The 24-year-old soldier was shot dead during an attack while on UN Peacekeeping duties in Lebanon last Wednesday.
In a statement, the Defence Forces said "Private Rooney was repatriated home from Lebanon by an Irish Air Corps CASA aircraft and was accompanied on this flight by a number of his colleagues from the 121 Infantry Battalion, including his company commander."
"The family were afforded private time with the remains in Baldonnel and a short prayer service was conducted before the remains departed Baldonnel with a Garda escort."
Taoiseach Leo Varadkar, urged people to "stand with, and express our condolences to private Rooney's family, his friends and colleagues".
"It's been a long time since we lost a soldier in combat in Lebanon. It does remind us how important that mission is.
"I've been there and have had an opportunity to meet with the soldiers, and meet with the local community."
"It's allowed people in that part of Lebanon for the last few decades to lead relatively normally."
A post-mortem is due to be carried out by the State Pathologist as part of the Irish Defence Force's investigation into his killing.
Separate inquiries are also being carried out by the UN and Lebanese authorities.