Thomas Cook is working with Hi-Media in the UK as it looks to increase its online advertising revenues.
Hi-media will work with advertisers and their agencies to develop bespoke advertising for Thomas Cook's travel-minded audience.
Stuart Adamson, head of media solutions Europe at Thomas Cook Online, said: "We have a large and loyal customer base across Europe visiting our sites looking for inspiration, researching and booking their travel option.
"We know this is a highly valuable audience, so partnering with Hi-Media helps us gain traction with major brands looking to reach purchase decision-makers."
Mathieu Roche, managing director of Hi-Media UK, added: "We will work with advertisers and their agencies to offer them a wide variety of branding and performance advertising solutions to reach this premium audience.”