[10] She was herself surpassed by her sister ship Allure of the Seas, which is 50 millimetres (2.0 in) longer, although this may have been caused by ambient temperature differences at the times the measurements were made.

[11] In May 2016, her second sister ship Harmony of the Seas became the new record holder with a length of 362.12 metres (1,188.1 ft),[12] and in March 2018, Symphony of the Seas, the fourth member of the Oasis class, became the new world's largest cruise ship with a length of 361.011 m (1,184.42 ft) and a tonnage of 228,081 GT.

Wide, shallow ships such as this tend to be "snappy", meaning that they can snap back upright after a wave has passed, which can be uncomfortable.

Her godmothers are Gloria Estefan, Michelle Kwan, Dara Torres, Keshia Knight Pulliam, Shawn Johnson, Jane Seymour and Daisy Fuentes.

[30] While exiting the Baltic Sea, the vessel passed underneath the Great Belt Fixed Link in Denmark on 31 October 2009 at 23:18 UTC.

The passage under the bridge was possible due to retraction of the telescoping funnels, and an additional 30 cm (12 in) was gained by the squat effect whereby vessels traveling at speed in a shallow channel will be drawn deeper into the water.

[34] The ship arrived there on 13 November 2009, where tropical plants were installed prior to some introductory trips and her maiden voyage on 5 December 2009.

[36][37] Oasis of the Seas was scheduled to cruise the Mediterranean out of Barcelona in summer 2019 before undergoing a major drydock at the end of the season.

[38] After spending nearly three months in dry dock receiving upgrades and new amenities, Oasis of the Seas then repositioned to her new homeport of Miami for the fall and winter 2019 seasons.

[39] During a March 8 to 15, 2020 sailing, Royal Caribbean notified the U.S. Centers for Disease Control and Prevention of a possible COVID-19 infection aboard Oasis of the Seas.

By April 20, 2020, two crew members remaining aboard Oasis of the Seas had died of COVID-19 in hospital in Florida.