Provided by Frommer's Unlimited, the guides cover 100 cities in 78 countries in six languages, and include event listings, walking tours and are integrated with Google Maps.
Frommer's wrote destination content to appeal to KLM's leisure and business travellers, which balanced with the airline's SEO keyword objectives Frommer's Unlimited UK general manger Joel Brandon-Bravo said.
This is the first service to use Frommer's reverse proxy framework - where raw content is delivered in XHTML to the customer's own server, which avoids the loss of page ranking often associated with white label services, Brandon-Bravo said.
"Traditionally people have worked in two different ways when they've been syndicating content - either they've provided raw data which the client is then responsible for databasing and delivering, or they use a white label site, which can result in the page dropping down search rankings as the site is recognised as coming from a different server," he said.
"KLM collect all the ready made content, inject into their content management system and out put it together with their booking engines and loyalty programme - they're actually publishing the site rather than a white label site."