Seventeen-year-old Chloe, who had worked part-time at the South Shields agency since January, died with Liam, 19, in the suicide bombing at the Manchester Arena on May 22, which killed 22 people.
Westoe director Graeme Brett said the agency had been “completely stunned” after being inundated with donations from “all four corners of the country” for the giveaway which staff are have named, Together Forever - The Big Prize Draw, in honour of the couple.
Brett said: “We thought we’d just get a bottle of wine or something like that but it’s just been fantastic and companies have been coming to us, which is amazing.
“This incredible generosity has touched everybody and I don’t think you’d see this kind of reaction and goodwill from colleagues in any other industry besides travel.”
Brett said that so far the raffle had received donations from more than 30 travel firms with prizes including city break trips, flights, vouchers and food and drink.
According to Brett, tickets will go on sales shortly priced at £5 and can be bought via bank transfer.
Those wishing to sell tickets can contact sales@westoetravel.co.uk and the prize draw will be made on August 31.
Brett said Westoe, which is a TTG Top 50 Agency for 2017, had been contacted by a number of operators asking for tickets for their on the road team members to sell when they make agency visits.
He added that agents who sold winning tickets would have the prize sent to them so that they could present it to the winner so “everyone can be involved” in the fundraising effort.
He also praised the continued work of Manchester-based homeworker Ken Garrity, of Ken Garrity Travel, and Pole Travel director Jill Waite, for their fundraising campaign for the Rutherford and Curry families, which has so far raised more than £1,800.