> ## Content Index > Fetch the complete content index at: https://www.thecontrail.org/llms.txt > Use this file to discover other available public pages before exploring further. # Air Serbia Flew 3 Hours Toward Moscow, Then Turned Back Over One Passenger - URL: https://www.thecontrail.org/why-planes-turn-around-mid-flight/ - Published: 2026-11-04T02:45:35.000Z - Updated: 2026-11-04T02:45:35.000Z - Description: The plane was already over Lithuania when it turned around. The reason, according to reports in Serbia: one passenger had allegedly boarded without going through security. Here's what happened and why an airline would fly all the way home over a single person. - Author: Zach Benitez - Tags: News, Air Serbia Why do planes turn around mid-flight? Usually it's weather, a mechanical problem or a sick passenger. On Tuesday night, an Air Serbia flight from Belgrade to Moscow gave a rarer answer. Flight JU134 had been in the air for well over an hour and was somewhere over southern Lithuania when it turned around and flew all the way back to Belgrade, landing just before 10 p.m. local time after a little more than three hours in the air. That's roughly how long the trip to Moscow takes. The reason, according to reports in Serbia, is that one passenger had allegedly boarded without going through the airport's security screening. Air Serbia reportedly said an additional security check of one passenger was needed. For everyone else on board, it was a three-hour flight to exactly where they started. --- ## What Happened on Flight JU134 The plane, an Airbus A320, left Belgrade at 6:48 p.m. on Tuesday. According to Serbian outlet Nova.rs, citing unnamed sources, the passenger in question was Aleksandar Vulin, a senior Serbian politician, who allegedly got onto the plane without the mandatory security check. The airport's head of corporate security reportedly reviewed camera footage, saw that the rules had been broken and ordered the plane back. Vulin reportedly said he was traveling to Moscow on business and slept through the flight, only finding out when he was woken up in Belgrade. The plane was expected to leave again after a full security inspection and a new crew. Neither Air Serbia nor Serbia's aviation authority had given a detailed public account by Tuesday night, so parts of this story could still change. The route itself is unusual. Air Serbia is one of the few European airlines still flying to Moscow, since EU airlines stopped flying to Russia after it invaded Ukraine in 2022 and Serbia isn't in the EU. The flight drew plenty of attention while it was happening. It was reportedly the most-tracked flight in the world on Flightradar24 as it made its U-turn, which tells you how many people were sitting at home watching a little plane icon do something very strange. ## Know Before You Fly Delays, strikes, new routes and the airline news that actually affects your trip, explained for normal travelers. Free in your inbox. Get Contrail Free Email sent! Check your inbox to complete your signup. No spam. Unsubscribe anytime. --- ## Why Fly All the Way Back? It might seem easier to just finish the trip, since the plane was already more than halfway there. But airport security works like a chain, and if one link is skipped, the whole flight is treated as unscreened. Nobody can be sure what that passenger or their bags were carrying until they're checked again. Landing in Moscow wouldn't have fixed that, because the security failure happened in Belgrade, and that's where the airport and police could deal with it, re-screen the plane and figure out how it happened. --- ## Other Reasons a Plane Turns Around A U-turn over one passenger is unusual, but planes turn back more often than most travelers realize. The most common reasons are: - **A medical emergency:** if a passenger gets seriously ill, the crew will often land at the nearest suitable airport, which can mean going back where they came from - **A disruptive passenger:** a fight, threats or someone refusing crew instructions can be enough for the captain to head back - **A mechanical warning:** even a minor one, if it's on a system the crew can't check in the air - **Someone who shouldn't be on board:** a security lapse like this one, or a passenger who ended up on the wrong flight - **Weather or closed airspace at the destination** The decision always belongs to the captain, who has the final say on anything to do with safety. It isn't cheap either. A turnaround means extra fuel, rebooked passengers, crews who may run out of legal working hours and planes stuck in the wrong place for the next flight, which is why airlines don't do it unless they feel they have to. If you're ever on a flight that turns around, stay seated, listen to the crew and check your airline's app once you land. Rebookings usually show up there before the gate agents can announce them, and the faster you move, the better your options tend to be. Air Serbia ยท Flight JU134 Why a plane turns around mid-flight 3h 8m In the air, landing right back in BelgradeReportedly over one passenger who skipped security 1 A medical emergencyThe nearest good airport can be the one you just left 2 A disruptive passengerFights, threats or ignoring the crew 3 A mechanical warningEven small ones the crew can't check in the air 4 A security problemSomeone or something that wasn't properly screened 5 Weather or closed airspaceWhen the destination can't take the plane **If it happens**Stay seated, follow the crew and check your airline's app when you land. Rebookings often show up there first. Contrail