Expect strict security at Heathrow. Ensure all liquids are in one small bag to avoid delays during manual screening.

| Most accurate provider | Mytrip 3 stars | 
|---|---|
| Most trusted provider | Mytrip 3 stars | 
| Round-trip from | $544 (Kiwi.com) | 
| One-way from | $308 (FlightHub) | 
| Popular in | July | 
| Cheapest in | September | 
| Average price | $725 | 
| Good round-trip deal | $813 or less | 
Fly from
Fly to
Route
Depart
Return
Price
LondonChennai
LHR - MAA
LHRMAA
London Heathrow
Mon 11/24
7:20 pm-3:10 pm
1 stop14h 20m
Chennai
Wed 11/26
3:55 am-2:30 pm
1 stop16h 05m
LondonChennai
LHR - MAA
LHRMAA
London Heathrow
Sat 1/10
8:05 pm-8:45 am
2 stops31h 10m
Chennai
Tue 2/10
6:00 pm-1:40 pm
3 stops25h 10m
LondonChennai
LHR - MAA
LHRMAA
London Heathrow
Thu 11/20
2:10 pm-5:35 am
Nonstop9h 55m
Chennai
Sun 11/30
7:35 am-1:35 pm
Nonstop11h 30m
LondonChennai
LHR - MAA
LHRMAA
London Heathrow
Sat 11/22
2:10 pm-5:35 am
Nonstop9h 55m
Chennai
Tue 12/2
7:35 am-1:35 pm
Nonstop11h 30m
LondonChennai
LHR - MAA
LHRMAA
London Heathrow
Sat 11/22
2:10 pm-5:35 am
Nonstop9h 55m
Chennai
Sun 11/30
7:35 am-1:35 pm
Nonstop11h 30m
LondonChennai
LHR - MAA
LHRMAA
London Heathrow
Sat 11/22
2:10 pm-5:35 am
Nonstop9h 55m
Chennai
Sat 11/29
7:35 am-1:35 pm
Nonstop11h 30m
LondonChennai
LHR - MAA
LHRMAA
London Heathrow
Mon 11/24
2:10 pm-5:35 am
Nonstop9h 55m
Chennai
Sat 11/29
2:30 am-7:45 am
1 stop34h 45m
LondonChennai
LHR - MAA
LHRMAA
London Heathrow
Sat 11/22
2:10 pm-5:35 am
Nonstop9h 55m
Chennai
Wed 11/26
2:30 am-3:25 pm
1 stop18h 25m
LondonChennai
LHR - MAA
LHRMAA
London Heathrow
Sun 12/7
7:20 pm-2:30 am
1 stop25h 40m
Chennai
Sun 3/1
7:35 am-1:35 pm
Nonstop11h 30m
LondonChennai
LHR - MAA
LHRMAA
London Heathrow
Thu 12/4
2:10 pm-5:35 am
Nonstop9h 55m
Chennai
Thu 12/11
4:05 am-12:15 pm
1 stop13h 40m
| Provider | Price Accuracy | Trust Score* | 
|---|---|---|
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*1 star | 
To ensure you get the cheapest price possible for a flight from London Heathrow Airport to Chennai, you should look to book at least 76 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
Currently, May is the cheapest month in which you can book a flight from London Heathrow Airport to Chennai (average of $500). Flying from London Heathrow Airport to Chennai in July is currently the most expensive (average of $680). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
One of the essential ways to save on airfare from London Heathrow Airport to Chennai is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the evening could potentially save you up to 21% on airfare.
About 25% of weekly flights between London and Chennai have experienced delays in the past year, with the average delay time being 138 minutes.
Historically, flights departing in the early afternoon are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.
Sunday tends to have the lowest number of delays on this route, whereas Thursday has historically faced a higher average of delays compared to other days of the week.
Over the last year, British Airways have had the lowest number of delays on this route, with just 25% of flights being delayed.
Abu Dhabi (AUH) – chosen by Cheapflights users on 24% of 1-stop itineraries from London Heathrow Airport to Chennai on Cheapflights.
Flights via Dubai (DXB) have the shortest average one-way travel time for 1-stop routes: 12h 23m.
Flights via Dubai (DXB) have the shortest average one-way travel time for 1-stop routes: 12h 23m.
Flights via Colombo (CMB) offer the fastest connection on this route, with an average layover time of 1h 15m.
Crew
Comfort
Food
Entertainment
Boarding
Overall
Reviews
Anonymous,Jun 2025
KTM - DXB
Crew
Comfort
Food
Entertainment
Boarding
Overall
Reviews
Anonymous,Jun 2025
KTM - DXB
Crew
Comfort
Food
Entertainment
Boarding
Overall
Reviews
Anonymous,Jun 2025
KTM - DXB
Crew
Comfort
Food
Entertainment
Boarding
Overall
Reviews
Anonymous,Jun 2025
KTM - DXB
Crew
Comfort
Food
Entertainment
Boarding
Overall
Reviews
Anonymous,Jun 2025
KTM - DXB
Crew
Comfort
Food
Entertainment
Boarding
Overall
Reviews
Anonymous,Jun 2025
KTM - DXB
| Airline | Cheapest | Average | Flexibility | On-time | 
|---|---|---|---|---|
| Cheapest$487 | Average$712 | FlexibilityNo cancel fee | On-time68% | |
| Cheapest$549 | Average$680 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$566 | Average$744 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$568 | Average$705 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$639 | Average$909 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$641 | Average$856 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$652 | Average$739 | FlexibilityNo cancel fee | On-time76% |