As of 27th of February 2021, only 45.15% of hotel websites are delivered via HTTPS. Exactly 3 years ago it was 22.47%. This is based on a set of ~875.000 hotel websites from all parts of the world.
Beginning in July 2018 with the release of Google Chrome 68, Chrome will mark all HTTP sites as “not secure“. Hotel websites handle sensitive customer information, so using HTTPS is essential. Nonetheless, more than 77% of hotel websites are still not secured.