This week, United Airlines reached a major milestone, with its new(ish) Polaris business-class seats now available on 100 wide-body planes. As it turns out, Delta’s celebrating a similar accomplishment — all of the carrier’s Boeing 777s now sport the airline’s Delta One Suites, complete with a sliding door at every seat.Now, business-class passengers traveling on Delta’s 10 777-200LRs or eight 777-200ERs won’t have to wonder about what they’ll find onboard — just like on the Airbus A350 and A330-900neo, the carrier’s entire 777 fleet offers a consistent onboard experience, with a total of 28 closed-door suites, 48 Premium Select recliners, 90 seats in Comfort+ and 122 in coach, with the latter two products arranged in a spacious 3-3-3 configuration.Delta One business class on the Boeing 777. Photo by Nick Ellis/The Points Guy.Delta’s 777s can be found flying around the world, and have recently operated a number of domestic and international flights.From Atlanta (ATL):Johannesburg, South Africa (JNB)Los Angeles (LAX)New York (JFK)From Los Angeles (LAX):Paris, France (CDG)Sydney, Australia (SYD)Tokyo, Japan (HND)From Minneapolis (MSP):Sign up for our daily newsletterEmail addressSign upI would like to subscribe to The Points Guy newsletters and special email promotions. The Points Guy will not share or sell your email. See privacy policy.Tokyo, Japan (HND)From New York (JFK):Mumbai, India (BOM)While all of the airline’s 777s flying passengers today sport the new products, Delta does have one 777-200LR still undergoing the retrofit process — N709DN. That particular aircraft is expected to return to service soon. For more on what to expect up front, see our ultimate guide to Delta One Suites.