The London to New York service will be featured on the flight booking channel for the US-based travel search site.
Sidestep also has a partnership with luxury travel provider PrivateJetSpecialist.com.
The development follows the recent announcement that SilverJet would be available via GDSs.
Rhys Jarvis, European business development director at SideStep, said: “At SideStep, our aim is to help our customers find the right deal to suit their needs and that doesn’t always just mean the cheapest.
“Partnering with a market leader like Silverjet allows us to offer our customers additional choice at the more premium end of the market,” said
SilverJet head of global online marketing, Tamarah Khatib, added: “With more than six million UK and US consumers using SideStep each month, this partnership will allow even more people to enjoy all the benefits of our award winning exclusively business class service.”