Short version: we got tired of juggling multiple agencies to find that one sweet deal.
sustainable.deals started as an internal tool. Our team travels, and like everyone else, we were bouncing between search engines, agency sites, and airline pages to compare fares. So we built a single search that does the comparing for us.
It worked so well that keeping it to ourselves felt wasteful. So we put it online — free, for anyone to use.
No account required. No paywall. No catch. Just search.