The map Indian carriers used for Europe is no longer a straight line. EASA’s live conflict-zone file still tells operators not to fly Iran, Iraq or Lebanon at any level. A separate Gulf bulletin, CZIB-2026-07R2, extended on 31 August through 30 September, tells them not to cruise the waters of the Persian Gulf inside the Bahrain, Kuwait, Doha and Emirates FIRs except as needed to arrive or leave airports in those FIRs, and to treat the Gulf of Oman west of 58 degrees east the same way. Kuwait remains closed to overflights until at least 2 October. Only approved traffic into and out of Kuwait airport may use that FIR. Satellite-navigation jamming and spoofing are still being reported across the belt. On top of that stack sits the older, unmoved fact, Pakistani airspace remains closed to Indian-registered aircraft. The Europe flight that once crossed Punjab and Iran now has to choose a southern dog-leg over the Arabian Sea, Oman, Saudi Arabia and Egypt, or a northern arc through Central Asia. Neither is the great-circle ticket the timetable was written for.
What follows are route-level planning estimates, not an audited airline loss. They use public block-time comparisons and a mid-range widebody cruise burn of about six tonnes an hour for an A350-900 or 787-9 at typical long-haul weight. A 777-300ER can sit a little higher. Fuel price is treated as a moving input, not a single invoice. None of these figures should be added into a national total. Airlines have not published a reconciled Europe-detour bill for September.
Delhi-London was about eight and a half to nine hours when the Pakistan corridor was open. Current Indian-carrier tracks that swing south and then north again are running closer to ten hours, sometimes more when flow control or a Gulf dog-leg is added. Call the extra airborne time 60 to 120 minutes. That is roughly six to twelve tonnes of extra fuel on the sector, before taxi and contingency. Payload comes off the other end of the same calculation. Extra fuel is weight that cannot be cargo or a full passenger load on a hot day. Delhi-Amsterdam is in the same band. Mumbai-Frankfurt loses less Pakistan mileage from the west coast but still cannot cut Iran or the Gulf waters, so the penalty is often 45 to 90 minutes, say four and a half to nine tonnes. Bengaluru-Paris starts farther south, so the Pakistan piece is smaller and the residual is more about Iran, Iraq and the closed Kuwait overflight which is like 30 to 75 minutes is a working planning range. Chennai-Istanbul is shorter and more often a narrowbody or A321XLR. The old path still wanted Pakistan. The new one is Arabian Sea, Oman, Saudi Arabia, then Turkey. Extra time of 30 to 60 minutes is enough to squeeze a crew-duty window even if the fuel bill looks modest next to a 777. Gulf connections into Dubai, Abu Dhabi or Doha are the exception that still looks like a direct arrival, because EASA allows flights to and from those airports. They are not a free ride. Tactical routing, short-notice holds, GPS interference on arrival and the risk that a connecting bank collapses when one inbound is late are now part of the product.
The money does not stop at the fuel bowser. An extra hour of block time eats crew legality. A Delhi–London pairing that once fitted a single operating crew with a legal layover can force a heavier crew or a longer slip. That is a hotel night and a spare body, not a line on a fuel invoice. Aircraft utilisation falls. A 787 that turned London and came home the next evening now needs more calendar time for the same rotation. Missed connections in Heathrow, Frankfurt or Schiphol become Air India’s problem even when the delay was born over the Red Sea. Cargo is the quiet casualty. Belly freight is the first thing a dispatcher offloads when the flight-plan fuel file grows. Forwarders already treat India–Europe as a less reliable overnight product than the timetable suggests. Schedule padding is how airlines hide the same physics from the passenger, they publish 10 hours 40 minutes so a 10-hour 10-minute airborne time still looks on time. The passenger still sits longer. The airline still burns the fuel.
Air India has said in public filings and ministry answers that reroutes raised duration and consumption and that Europe and North America have been flown via Oman, Saudi Arabia and Egypt. It has used technical stops in Vienna, Copenhagen and Rome when the remaining sector would otherwise break payload or fuel limits. IndiGo used Saudi corridors when they opened then pulled damp-leased widebody Europe flying including Manchester and Copenhagen, when the hours and the fuel no longer fitted a low-cost model. Those are operational facts. Parliament has been told that tens of thousands of Indian-carrier international flights were affected by West Asia restrictions earlier in the year. That is a count of disruption not a profit-and-loss line. Until Air India, IndiGo or the ministry publish route-level extra burn and extra block hours for September, the honest number is more miles, more fuel, tighter crews, lighter holds and a Europe map that still has a hole where Pakistan and the Gulf overflight used to be.