[6] The first edition of Ultra Korea welcomed approximately 60,000 people in attendance[7] and included the likes of Skrillex, Steve Aoki, Sidney Samson, J Symposium, Twelvetones, Marc Vedo, Elio Riso, Afrobeta, Tiesto, Team H, Chuckie, Sander Kleinenberg, The Crystal Method, Carl Cox, John Digweed, Yousef, and many more to Seoul's Olympic Stadium.

[17] Artists on the bill for Ultra Korea 2015 were Hardwell, Skrillex, Nicky Romero, DVBBS, Justin Oh, Porter Robinson, 2ManyDJs, Kennedy Jones, Los de La Vega, Protoculture, David Guetta, Alesso, Knife Party, Galantis, Snoop Dogg, Lil Jon, Nic Fanciulli, Pirupa, and many more.

[21] Artists on the bill for Ultra Korea's fifth edition included Afrojack, Avicii, Armin van Buuren, Axwell & Ingrosso, Chase and Status (live), deadmau5, Knife Party, Martin Garrix, Heatbeat, Eelke Kleijn, Rabbit in the Moon, Fedde Le Grand, Jauz, Netsky (live), Sunnery James & Ryan Marciano, Justin Oh, and many more.

[22] Ultra Korea drew in a record-breaking 150,000+ strong crowd, for what was officially the largest electronic music festival ever to take place on Korean soil.

To celebrate Ultra Korea returning in 2017 to Seoul, a special private sale took place on 23 August 2016 and the allotted tickets were sold out within that day.

Phase 1 lineup of Ultra Korea was released on 4 April 2018 and included Above & Beyond, Axwell & Ingrosso, The Chainsmokers, David Guetta, Galantis, Nicky Romero, Steve Angello, Zedd and Zhu.