The cheapest London Gatwick to Mumbai return flight on the radar right now is £375, flying with Gulf Air via one or more connections. It covers departures in January 2027, and every dated link below opens that exact LGW–BOM search on Skyscanner. That is roughly 12% below the £428 this route usually costs. Across 97 recorded checks it has ranged between £375 and £504. Our sampling points to January 2027 as the cheapest month to fly London Gatwick to Mumbai.
Prices are re-checked against Skyscanner automatically, and every one shows when it was last confirmed, so nothing here is older than it looks. Not flying from London Gatwick? We track 59 other departure cities for Mumbai, listed at the foot of this page.
Prices like this tend to vanish fast. If it has gone when you look, try the days either side of the dates above, since London Gatwick to Mumbai is often still worth booking within a day or two of the fare we found.