Cheap flights from London to Chennai from £276

The month of November is, on average, the cheapest month to fly to Chennai from London, with most prices found around £471. If you aren’t able to travel during the month of November, then book flights to Chennai from London during September instead. Flights to Chennai in September, while not as cheap as those in November, still average around £474.

The cheapest day to depart on your flight to Chennai is on a Tuesday when prices can be found for as low as £625. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around £735. These prices are subject to change though, so be sure to set up a Price Alert for flights to Chennai.

Flying to Chennai from London at midday is the least expensive time of day to depart. momondo users have found prices as low as £662 when looking at flights departing at midday. In contrast, the most expensive time of day to depart to Chennai is in the morning when prices are around £704.

Fly from London Heathrow to Chennai for the best London - Chennai flight prices

You are more likely to see cheaper flights to Chennai from London when booking weeks ahead of your departure date. In general, you can expect to find flights to Chennai for around £561 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Chennai from London for as low as £516 on momondo.

There are 3 cabin classes available to choose from on London to Chennai flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Air India, Gulf Air, and SWISS are the most popular carriers operating from London to Chennai

Etihad Airways, Air India and British Airways are the top three most popular airlines that fly to Chennai from London according to our data. Etihad Airways is the first choice among our users, with 30% of people opting to fly with this airline when travelling to Chennai. Keep in mind that there are 14 different airlines that fly to Chennai on a routine basis, so you have a few additional options to choose from.

Historically, on average around 20% of flights between London and Chennai have experienced a delay on any given week. The average delay length over the past 12 months has been 139 minutes.

Generally, flights departing in the early afternoon tend to experience fewer delays. Flights departing in the early afternoon have, in the past, seen delays more frequently in comparison.

Saturday is statistically the day of the week that experiences the fewest delays on this flight route. Wednesday has historically seen more delays on average compared to the rest of the week.

According to our data, British Airways have had the fewest delays on this route over the last 12 months, with about 20% of their flights experiencing any sort of delay.

Abu Dhabi (AUH) was the most common stop: 26% of momondo users choosing one-stop flights on this route connected there.

Flights via Doha (DOH) offer the lowest average return price of £543.

Flights connecting via Frankfurt am Main (FRA) have the shortest average one-way travel time: 12h 28m.

Colombo (CMB) has the shortest average stopover time for this route: 1h 40m.

As of June 2026, there are 2 flights per day flying from London to Chennai. The most common time of day flights depart is 12:00, with 100% of flights taking off in the afternoon.

14 flights are operational weekly from London to Chennai as of June 2026. The most popular departure day for this route is Mon, with 14% of flights per week taking off on this day.