Cheap flights from London to Chennai from £249

The month of September is, on average, the cheapest month to fly to Chennai from London, with most prices found around £461. If you aren’t able to travel during the month of September, then book flights to Chennai from London during November instead. Flights to Chennai in November, while not as cheap as those in September, still average around £469.

The cheapest day to depart on your flight to Chennai is on a Tuesday when prices can be found for as low as £619. 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 £687. 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 in the morning is the least expensive time of day to depart. momondo users have found prices as low as £653 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 £654.

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 £560 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 £507 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.

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

Air India, British Airways and Etihad Airways are the top three most popular airlines that fly to Chennai from London according to our data. Air India is the first choice among our users, with 32% of people opting to fly with this airline when travelling to Chennai. Keep in mind that there are 15 different airlines that fly to Chennai on a routine basis, so you have a few additional options to choose from.

Historically, on average around 23% 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 131 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 23% of their flights experiencing any sort of delay.

Abu Dhabi (AUH) was the most common stop: 23% of momondo users choosing one-stop flights on this route connected there.

Flights via Manama (BAH) offer the lowest average return price of £542.

Flights connecting via Muscat (MCT) have the shortest average one-way travel time: 11h 55m.

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

As of February 2026, there are 2 flights per day flying from London to Chennai. The most common time of day flights depart is 14:00, with 100% of flights taking off in the afternoon.

16 flights are operational weekly from London to Chennai as of February 2026. The most popular departure day for this route is Fri, with 25% of flights per week taking off on this day.