The cheapest London to Jakarta return flight on the radar right now is £410, flying with Xiamen Airlines via one or more connections. It covers departures in October 2026, and every dated link below opens that exact LHR–CGK search on Skyscanner. That is roughly 24% below the £540 this route usually costs. Across 82 recorded checks it has ranged between £354 and £673. Our sampling points to October 2026 as the cheapest month to fly London to Jakarta.
We do not post a price and leave it to age. Each fare is re-checked against Skyscanner on a schedule and carries the time it was last confirmed. Not flying from London? We track 57 other departure cities for Jakarta, listed at the foot of this page.
Cheap fares do not hang around. If this one has already gone, nudge the dates either way by a day or two; London to Jakarta is usually still decent value around the same window.