Secret Escapes, the members-only travel club, is to provide hotel and city-break offers to Achica, an online lifestyle club, via a white-label deal.
The Achica partnership is the fourth Secret Escapes has sealed since its launch in February.
The start-up, which announced second round funding in October, already has deals with Teletext Holidays and Planet Confidential and has also recently formed a partnership with the Telegraph Media Group.
Secret Escapes boss Alex Saint describes this latest tie-up with Achica as a good demographic fit.
In terms of the number of flash sales sites that have sprung up recently, Saint believes there is room for one or two in each sector:
"We think we can do a great job. We're ABTA bonded and we have a best online rate guarantee. We will not put a deal on the site that is not significantly better than anywhere else. UK consumers are a bit discount weary and we have to be careful not to oversell the discount message."
Secret Escapes also offers consumers links to other sites enabling them to check deals for themselves.
The company plans to bring further package holiday offers to the service early next year as well as a pipeline of further partnerships.