The acquisition is expected to complete within the next 15 working days.
Bill Brindle, chief information officer of Hogg Robinson Group, said: "eWings.com provides us with a developed solution as well as some great new technology which is highly complementary to our own proprietary technology and will fit perfectly with our platform."
"In addition to being an exciting new approach to fast and easy business travel, eWings.com gives us a speed to market advantage in the small business space and means we can accelerate our new distribution strategy across the whole market.
"There will be no immediate change for clients, partners and staff, and it will be very much business-as-usual for eWings.com and HRG as the teams work towards the technology opportunities and new client advantages that this exciting acquisition brings."