Since October 25, IndiGo has been flying the world's longest scheduled route with the Airbus A321XLR: Mumbai to Amsterdam, a great-circle distance of roughly 3,707 nautical miles (6,865 km) and about 10 hours in the air. But the narrowbody never actually flies that line. Because of airspace bans and conflict zones along the direct path, the daily service detours south through Turkey, Iraq, the Gulf and Oman — avoiding both Pakistan and Iran entirely — stretching the real distance flown to around 4,200 nautical miles (7,778 km), about 13% longer.
The detours are not optional. Pakistan closed its airspace to Indian-registered and Indian-operated aircraft in April 2025 amid rising tensions and has extended the ban repeatedly. Iranian airspace, while not formally banned for Indian carriers, carries a European Union Aviation Safety Agency advisory to avoid it at all altitudes due to the Middle East conflict. That leaves a narrow corridor for India-Europe flights.
The route matters especially for the A321XLR, which replaced the leased Boeing 787-9 Dreamliners IndiGo used previously. The smaller aircraft has far less slack to carry extra fuel than a widebody, and the longer routing pushes the flight close to its advertised 4,700-nautical-mile maximum range. The result, according to reports: IndiGo is selling fewer than 140 of the 195 seats on the Mumbai-Amsterdam leg — over a quarter of the cabin held back to guarantee the flight can be completed nonstop. The previous 787-9 operation offered 338 seats, so the change means nearly 200 fewer seats per flight in that direction.
There is one surprising quirk in the early data. Despite being smaller and slower than the 787-9, the A321XLR has actually averaged about 20 minutes less airborne time flying Mumbai to Amsterdam (9h36m versus 9h56m over the first 11 days). The comparison comes with caveats, though — the aircraft fly at different times of day and wind and traffic conditions vary, so it's not proof the narrowbody is faster. Westbound to Mumbai, the 787-9 was quicker by about 29 minutes.
IndiGo is running the daily service efficiently: four different A321XLRs (VT-NLA through VT-NLD) have rotated onto the route so far, each able to do the out-and-back round trip within about 24 hours thanks to a two-and-a-half-hour turnaround in Amsterdam. The same jets also pop up on IndiGo's shorter international routes to Athens and Istanbul.
For travellers, the practical takeaway is that Mumbai-Amsterdam on IndiGo is now a narrowbody long-haul: fewer seats, tighter inventory and a business class ('IndiGoStretch', 12 seats) that will likely sell fast. If you want a specific date, book early — a quarter of the aircraft can't be sold at all on the westbound leg. Anyone nervous about 10 hours in a single-aisle seat should weigh that against the widebody alternatives from other carriers via Gulf hubs.
