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Cheap flights from Rennes to London Heathrow Airport from £97

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/6. Fares are subject to change and may not be available on all flights or dates of travel.
RNS — LHR
1 May — 8 May1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Rennes to Heathrow

Enter your travel dates to find the best prices.

Cheapest flights from Rennes to Heathrow
Explore the most affordable flight options available from Rennes to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 1 April 2026.

Wed 11/1111:05
RNS
-
LHR
1 stop6h 30m
Air France
Sun 15/1108:55
LHR
-
RNS
1 stop24h 25m
Air France
Deal found 31/3£169
Thu 7/511:05
RNS
-
LHR
1 stop3h 40m
Air France
Sat 9/506:15
LHR
-
RNS
1 stop5h 40m
Air France
Deal found 28/3£182
Wed 20/511:05
RNS
-
LHR
1 stop6h 30m
Air France
Sun 31/519:45
LHR
-
RNS
1 stop13h 35m
Air France
Deal found 31/3£183
Wed 29/411:05
RNS
-
LHR
1 stop3h 40m
Air France
Wed 6/519:45
LHR
-
RNS
1 stop13h 35m
Air France
Deal found 30/3£184
Sat 25/411:05
RNS
-
LHR
1 stop6h 30m
Air France
Mon 27/415:20
LHR
-
RNS
1 stop18h 00m
Air France
Deal found 29/3£185
Wed 10/614:25
RNS
-
LHR
1 stop4h 10m
Multiple Airlines
Tue 16/619:45
LHR
-
RNS
1 stop13h 35m
Multiple Airlines
Deal found 29/3£185
Sat 18/417:20
RNS
-
LHR
1 stop4h 35m
Multiple Airlines
Tue 21/415:25
LHR
-
RNS
1 stop17h 55m
Multiple Airlines
Deal found 30/3£186
Wed 20/511:05
RNS
-
LHR
1 stop3h 40m
Air France
Sun 24/519:45
LHR
-
RNS
1 stop13h 35m
Air France
Deal found 28/3£187
Mon 27/411:05
RNS
-
LHR
1 stop21h 50m
Air France
Wed 6/519:45
LHR
-
RNS
1 stop13h 35m
Air France
Deal found 30/3£188
Thu 7/511:05
RNS
-
LHR
1 stop3h 40m
Multiple Airlines
Sun 10/520:55
LHR
-
RNS
1 stop16h 00m
Multiple Airlines
Deal found 30/3£188
Tue 19/511:05
RNS
-
LHR
1 stop3h 40m
Air France
Sun 24/519:45
LHR
-
RNS
1 stop13h 35m
Air France
Deal found 28/3£189
Tue 23/614:25
RNS
-
LHR
1 stop4h 10m
Multiple Airlines
Sun 28/617:35
LHR
-
RNS
1 stop15h 45m
Multiple Airlines
Deal found 28/3£190

Find flight deals from Rennes to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from Rennes (RNS) to Heathrow (LHR). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 1 April 2026.

Round-trip from

£182

One-way from

£97

Popular in

October

Cheapest in

March

Average price

£157
Air France
  • Air France
  • 7/5-9/5
  • 2 total stops
  • 9h 20m total
  • Rennes to London
Search Deals
KLM
  • KLM
  • 7/6
  • 1 total stop
  • 4h 25m total
  • Rennes to London
Search Deals
Highest demand for flights based on searches. 30% potential increase in price (£67 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 12% potential price decrease (£17 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Rennes to Heathrow that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 1 April 2026.
Use the filters below to find and compare flights from Rennes to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Sun 24/5

14:25-20:55

1 stop7h 30m

London Heathrow

Sun 31/5

20:55-10:20

2 stops12h 25m

£204
Fastest return journey

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Wed 6/5

14:30-19:25

1 stop5h 55m

London Heathrow

Fri 15/5

06:30-13:55

1 stop6h 25m

£207

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Tue 23/6

14:25-17:35

1 stop4h 10m

London Heathrow

Tue 30/6

20:55-10:20

2 stops12h 25m

£238

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Fri 1/5

14:25-20:55

1 stop7h 30m

London Heathrow

Sun 3/5

20:55-10:20

2 stops12h 25m

£296

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Mon 11/5

14:25-17:35

1 stop4h 10m

London Heathrow

Wed 13/5

20:55-10:20

2 stops12h 25m

£324

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Sun 19/4

14:25-17:50

1 stop4h 25m

London Heathrow

Tue 21/4

20:55-10:20

2 stops12h 25m

£324
Cheapest one-way

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Tue 12/5

14:25-20:55

1 stop7h 30m

£106
Fastest single journey

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Sat 25/4

11:05-16:35

1 stop6h 30m

£119

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Thu 23/4

11:05-16:35

1 stop6h 30m

£120

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Wed 22/4

11:05-16:35

1 stop6h 30m

£120

Flights are sorted by cheapest return flights first.

Deals found on 1/4

Showing 1-10 of 16 resultsSorted by cheapest first
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Best time to book a flight from Rennes to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Rennes with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Rennes to London Heathrow Airport

What is the cheapest month to book a flight from Rennes to London Heathrow Airport?

Currently, May is the cheapest month in which you can book a flight from Rennes to London Heathrow Airport (average of £40). Flying from Rennes to London Heathrow Airport in January is currently the most expensive (average of £168). 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.

Related info for your journey

Find useful and relevant information for your journey from Rennes to Heathrow. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Rennes to London Heathrow?

    If you book a flight to London Heathrow from Rennes, you will be flying from St Jacques, which is the city’s only airport. Rennes St Jacques (RNS) is located 4.0 mi from the center of Rennes. There are 0 flights from St Jacques to London Heathrow per day from 0 different airlines.

  • How long is the flight from Rennes to London Heathrow Airport?

    For as low as £204, KLM can have you in London Heathrow Airport from Rennes in 7h 30m. There are 242 mi between Rennes and London Heathrow Airport.

  • Can I find deals for flights from Rennes to Heathrow that include hotel bookings?

    Yes. In addition to deals on Rennes to Heathrow flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Rennes to Heathrow?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Rennes to Heathrow.

  • Can I find deals for business class flights from Rennes to Heathrow?

    Yes. Cheapflights offers flight deals from Rennes to Heathrow by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Rennes to London Heathrow Airport?

    Currently, May is the cheapest month in which you can book a flight from Rennes to London Heathrow Airport (average of £40). Flying from Rennes to London Heathrow Airport in January is currently the most expensive (average of £168). 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.

See more FAQs

Travelling to a place near London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Milton Keynes
Wembley
Croydon
Northampton
Hounslow
Gatwick
Slough
Ilford
Luton
Hayes
Brentford
Colchester
Guildford
Watford
Kingston upon Thames
Romford
Eastbourne
Swindon
Bedford
Chelmsford

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Why should you use Cheapflights to find cheap flight tickets from Rennes to Heathrow?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Rennes to Heathrow for you. Better yet — we are completely free to use.

Can Cheapflights find flights from Rennes to Heathrow with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Rennes to Heathrow, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from Rennes to Heathrow become cheaper?

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