The cheapest London to Ho Chi Minh City return flight on the radar right now is £367, flying with China Southern via one or more connections. It covers departures in November 2026, and every dated link below opens that exact LHR–SGN search on Skyscanner. At 26% under the £498 we normally record here, it is one of the strongest LHR–SGN fares in our index. Across 81 recorded checks it has ranged between £357 and £569. Our sampling points to November 2026 as the cheapest month to fly London to Ho Chi Minh City.
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? We track 62 other departure cities for Ho Chi Minh City, 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 to Ho Chi Minh City is often still worth booking within a day or two of the fare we found.