Cheap flights from London Heathrow Airport to Chennai from £260

The month of September is, on average, the cheapest month to fly to Chennai from London Heathrow Airport, with most prices found around £476. If you aren’t able to travel during the month of September, then book flights to Chennai from London Heathrow Airport during May instead. Flights to Chennai in May, while not as cheap as those in September, still average around £486.

The cheapest day to depart on your flight to Chennai is on a Tuesday when prices can be found for as low as £624. 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 £706. 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 Heathrow Airport in the morning is the least expensive time of day to depart. momondo users have found prices as low as £662 when looking at flights departing in the morning. In contrast, the most expensive time of day to depart to Chennai is at midday when prices are around £667.

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

You are more likely to see cheaper flights to Chennai from London Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Chennai for around £572 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 Heathrow Airport for as low as £522 on momondo.

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

Etihad Airways is the most popular carrier operating from London Heathrow to Chennai

Air India, British Airways and Etihad Airways are the top three most popular airlines that fly to Chennai from London Heathrow Airport according to our data. Air India is the first choice among our users, with 33% 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 22% 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 133 minutes.

Generally, flights departing in the early afternoon tend to experience fewer delays. Flights departing in the evening 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 22% of their flights experiencing any sort of delay.

Abu Dhabi (AUH) was the most common stop: 33% of momondo users choosing one-stop flights on this route connected there.

Flights via Manama (BAH) offer the lowest average return price of £566.

Flights connecting via Frankfurt am Main (FRA) have the shortest average one-way travel time: 12h 31m.

Colombo (CMB) has the shortest average stopover time for this route: 1h 36m.

As of March 2026, 2 flights take off from London Heathrow Airport and land in Chennai each day. The most common flight departure time for this route is 14:00, with 100% of daily flights taking off in the afternoon.

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