Delta Air Lines' SkyTeam alliance is offering a sale on "round the world" fares.

The global airline alliance group is offering a 15 percent discount on round the world trips booked by March 31, 2017. Trips can include flights on any of the 20 SkyTeam member airlines, including Delta.

SkyTeam's website has a planning tool for round the world trips, which have three to 15 stops over a period up to one year.

Other options are themed round the world itineraries including beach vacations, history & culture, world metropolis, natural world and wines of the world.

An itinerary from Atlanta to Paris, Moscow, Tokyo and back to Atlanta has an estimated fare of $3,903 for an economy ticket, according to the trip planner tool.