Chris Martin has stated that "O (Fly On)" is his favorite piece of music ever created by the band.

O (Live at Royce Hall, Los Angeles) - Coldplay ... The Kid LAROI. TikTok·The Kid LAROI. 10 top flying-themed songs - Devon Air Ambulance Trust

is the poignant closing track of Coldplay’s 2014 album, Ghost Stories . Recognized for its meditative and ethereal quality, it serves as a raw, emotional finale to an album heavily centered on themes of loss, introspection, and resilience. Song Composition and Structure The track is technically split into two distinct parts:

Lyrics like "One minute they arrive, next you know they're gone" encapsulate the pain of watching someone drift away, while the repeated phrase "Fly on" suggests a bittersweet acceptance of their departure.