Three British Airways cabin crew members died in a crash involving a lorry and a car outside Heathrow Airport on New Year's Eve.
A white Toyota Yaris collided with a Mercedes HGV on Bedfont Road, in Stanwell, at about 23:40 GMT.
Two men aged 25 and 23 and a 20-year-old woman, who were in the Yaris, died at the scene. A fourth passenger, a 25 year-old woman, was seriously injured.
British Airways said it was "deeply saddened" by the news.
A spokesperson said: "Our thoughts are with their family and friends, who we are supporting at this distressing time."
Their next of kin have been informed.
A Go Fund Me page set up in memory of the three called "BA Angels Fund" had raised almost £35,000 in its first seven hours.
The page, which appears to have been started by colleagues, says: "I have set up this fund to raise money so that we as a fleet can send a nice flower arrangement to the three crew members' funerals and hopefully make a nice donation to a charity of the families' choosing….
"I know it is January and I know that money is tight but I know that as a fleet we will pull together and make this happen."
The driver of the lorry was taken to hospital as a precaution.
The road remained closed on Wednesday to allow the lorry to be recovered.
The lorry was operated by air services provider dnata, which offers ground handling, cargo, travel, and flight catering services to airlines.
A dnata spokesman said: "We can confirm that one of our trucks was involved in a road traffic accident on the evening of 31 December.
"We are fully assisting relevant authorities with their investigations. Our thoughts and condolences are with the families of those affected by this very sad incident."
Sgt Chris Schultze, of Surrey and Sussex Roads Policing Unit, said: "We are continuing to appeal for witnesses to what happened and would urge anyone who may have any video footage, CCTV or dash cam or any other kind, to get in touch with us."