Story highlights Four hours into flight, plane returned to LAX after "administrative mix-up" 
 
 Crew discovered "one of the passengers boarded the incorrect flight," airline says 
 
 (CNN) Chrissy Teigen and other Tokyo-bound passengers ended up right where they started after eight hours of flying: Los Angeles. 
 
 The model and TV personality tweeted about enduring her "flight to nowhere" Tuesday night after All Nippon Airways Flight 175 made a U-turn and headed back to Los Angeles. 
 
 The plane, which had 226 passengers aboard, turned around four hours into its flight to Tokyo "due to an administrative mix-up," an aviation source said. 
 
 The crew discovered an unauthorized passenger had boarded the flight, and opted to return to Los Angeles even though the mix-up was resolved, according to the source. 
 
 Two brothers were both going to Tokyo but were booked on separate flights, two law enforcement sources told CNN. One law enforcement source told CNN the two brothers have very similar names. Somehow, both brothers were allowed to board the All Nippon Airlines flight, even though only one of the brothers was actually booked on it. The crew discovered that extra person during the flight. 
 
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 Lmao after all this I will have spent 8 hours on a flight to nowhere. Like we were all just havin a great time up here flyin in the sky watching gran torino time to go home now
– It's not brain surgery, but United Airlines kinda botched this one. The company put an 80-year-old woman with partial blindness on the wrong flight, sending her to Denver instead of North Carolina—and left her family in no mood to play nice, WRAL reports. "How is it possible that a woman got on a plane that she did not have a boarding pass for and is now in another state?” says Mikki Paradis, daughter-in-law of Maria Larios, who was flying from El Salvador to Raleigh-Durham for her daughter's brain surgery. The family had requested special assistance for Larios, but United apparently gave her the wrong boarding pass at a Houston layover and she got on the wrong plane. "They were like, 'Oh yeah. We made a mistake. ... But it's not a big deal. We've already got her on a flight to Raleigh, and we gave her a meal voucher,'" says Paradis. United says it's been in contact with Larios' family and is investigating "so that we can prevent this from happening again." But Paradis insists they were too casual: "You lost a person, and the whole time they were treating me like they lost my luggage," she says. It's not the first wrong-person-on-a-plane dilemma in recent months, CNN reports. Last December, two brothers boarded an All Nippon Airways flight from LA to Tokyo when only one was supposed to—so the plane turned back after four hours. TV personality Chrissy Teigen was on board and tweeted about her "flight to nowhere."