Customers on nearly all international routes to the states will be able to use a new built-in functionality in Delta’s FlyReady app to directly upload and verify their Covid vaccination certificate and negative test results. 

Once the requirements are met, an indicator on the customer’s boarding pass will verify they are ready to travel.

The airline said the new tool "simplifies the travel experience" by sharing a streamlined view of the entry requirements of the customer’s destination, including those beyond health documentation.

Rhonda Crawford, senior vice president of global distribution and digital strategy, said: "In the months ahead, many of our customers will be traveling to the US for the first time since before the pandemic – reuniting with family members, friends or colleagues and reclaiming the joy of travel.

"And though international travel looks a lot different these days, we’ve listened to customers to make updates that will give them more personalized and better access to the information they say is important – removing the guesswork from travel plans and making room for them to enjoy their journey."