As millions of would-be travelers stay home because of the coronavirus pandemic, one airline has found an eager customer: Amazon.

Sun Country Airlines, an Apollo Global Management-owned carrier, struck a deal last December to start flying 10 Boeing 737 freighters for the online retailer. Minneapolis-based Sun Country plans to be flying all 10 of the cargo planes by the end of July, earlier than the previous target for summer’s end, CEO Jude Bricker told CNBC on Wednesday.

Passenger demand is down 95% at Sun Country from what was expected just a few months ago, echoing similar declines throughout the U.S. air travel industry, so the additional cargo business is welcome. The operation will begin with its first plane on May 7.

While Sun Country’s plans to fly dedicated planes for Amazon started last year, other airlines are now turning to air cargo as they face a dearth of passengers. American, Delta and United are among the large airlines that have flown pure-cargo flights, delivering everything from perishables to medical supplies.

Sun Country, whose low-cost passenger operation focuses on sun-seekers and other travelers visiting friends and relatives around the U.S., had already planned to shuffle pilots to cater to the new Amazon cargo flying this summer.

“We got a little bit lucky,” Bricker said. “We were the main constraint in the ramping [up]. We were taking pilots off the passenger service and now that’s not a concern.”