Cheap flights from London Heathrow Airport to Chennai from $345

In general, September is the cheapest month to fly from London Heathrow Airport to Chennai. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $630. If you’re not able to fly to Chennai in September, then May is your next best option. Flight prices from London Heathrow Airport to Chennai during May average around $644.

The cheapest day to depart on your flight to Chennai is on a Sunday when prices can be found for as low as $890. This is often the case because there is less demand to fly during this day of the week. Flights from London Heathrow Airport to Chennai on a Tuesday will generally be more expensive and average around $1,097. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

At noon is the cheapest time of day to fly from London Heathrow Airport to Chennai when you can find flight prices for as low as $872. Flying to Chennai at noon is an ideal time because this is during off-peak travel hours. In contrast, the most expensive time of day to depart to Chennai is in the morning when prices are around $961.

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 $755 when searching weeks out. 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 $682 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.

You could potentially save up to 3% on your flight if you consider stops on a London Heathrow Airport to Chennai flight.

As of February 2026, prices for London Heathrow Airport to Chennai flights are approximately 4% more expensive when compared to flights at the same time last year.

Air India is the most popular carrier operating from London Heathrow to Chennai

British Airways, Etihad Airways and Air India are the top three most popular airlines that fly to Chennai from London Heathrow Airport according to our data. British Airways is the first choice among our users, with 33% of people opting to fly with this airline when traveling to Chennai. Keep in mind that there are 6 different airlines that fly to Chennai on a routine basis, so you have a few additional options to choose from.

Historically, on average around 24% 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 130 minutes.

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

Saturday is statistically the day of the week which experiences the fewest number of 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 least number of delays on this route over the last 12 months; with about 24% of their flights experiencing any sort of delay.

Manama (BAH) was the most common stop: 77% of momondo users choosing 1-stop flights on this route connected there.

Flights via Manama (BAH) offer the lowest average round-trip price of $625.

Flights connecting via Abu Dhabi (AUH) have the shortest average one-way travel time: 12h 18m.

Abu Dhabi (AUH) has the shortest average layover time for this route: 1h 08m.

As of February 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 2:00PM, with 100% of daily flights taking off in the afternoon.

As of February 2026, 16 flights take off from London Heathrow Airport and land in Chennai each week. The most common flight departure day for this route is Fri, with 25% of weekly flights taking off on this day.