As of Dec. 8, 2015, all six seasons of "Lost" are available for streaming on Netflix. The show is also available for purchase on Amazon Prime, with the option to buy individual episodes, as well as full seasons.
The full series of "Lost" is available for streaming on Netflix for paid subscribers. The entire series show is also available in high definition on Amazon Prime, on which prices for individual episodes cost $2.99 and full seasons cost $24.99. Episodes are also available in standard definition for $1.99 per episode or $19.99 per season. The show is also available on Blu-ray and DVD, with the option to buy individual seasons or the complete series.