Lufthansa Cargo will carry out six charter flights between Frankfurt and New York on behalf of Deutsche Post as the postal operator looks to meet e-commerce demand.
The Frankfurt-hubbed airline began the MD-11 flights in mid-November and they will continue until shortly before Christmas Eve, flying each Monday.
Lufthansa Cargo chief product and sales officer Alexis von Hoensbroech said: "In the six weeks before Christmas in particular, our Airmail/eCommerce product is in great demand for packages sent on short notice and deadline-sensitive shipments.
"For this reason, we increased our capacity exclusively for our close partner Deutsche Post AG in recent years.
"However, 2017 is a special situation, as we have never before organised so much additional cargo space on such short notice.
"We know that many gifts will only manage to make it under the tree on time thanks to these extra flights.
"In addition, they support many small and medium-sized companies and e-cmmerce platforms in Germany in particular in gaining access to the major global players during the time of year with the highest turnover."
The first flight, which can carry as much as 60 tonnes, took off on November 13, and the last flight travels from FRA to JFK on December 18 with a return on December 19.