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Cheap flights from Rennes to London Heathrow Airport from £89

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 31/3. Fares are subject to change and may not be available on all flights or dates of travel.
RNS — LHR
1 Apr — 8 Apr1
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 2 March 2026.

Sat 25/413:35
RNS
-
LHR
1 stop8h 50m
Air France
Mon 27/419:45
LHR
-
RNS
1 stop13h 35m
Air France
Deal found 26/2£162
Thu 19/311:05
RNS
-
LHR
1 stop6h 30m
Air France
Sun 22/319:20
LHR
-
RNS
1 stop14h 00m
Air France
Deal found 28/2£165
Thu 3/1211:05
RNS
-
LHR
1 stop6h 30m
Air France
Sun 6/1219:20
LHR
-
RNS
1 stop14h 00m
Air France
Deal found 27/2£167
Sat 14/311:20
RNS
-
LHR
1 stop11h 05m
Air France
Sun 15/319:20
LHR
-
RNS
1 stop14h 00m
Air France
Deal found 27/2£168
Sat 14/311:20
RNS
-
LHR
1 stop11h 05m
Air France
Sat 21/319:20
LHR
-
RNS
1 stop14h 00m
Air France
Deal found 28/2£168
Fri 13/317:35
RNS
-
LHR
1 stop21h 50m
KLM
Mon 16/320:25
LHR
-
RNS
1 stop19h 40m
KLM
Deal found 26/2£171
Mon 16/317:10
RNS
-
LHR
1 stop4h 40m
KLM
Fri 20/308:40
LHR
-
RNS
1 stop7h 25m
KLM
Deal found 1/3£171
Sat 7/311:20
RNS
-
LHR
1 stop6h 15m
Air France
Sat 14/319:20
LHR
-
RNS
1 stop14h 00m
Air France
Deal found 27/2£173
Thu 2/411:05
RNS
-
LHR
1 stop3h 40m
Air France
Sat 4/419:45
LHR
-
RNS
1 stop13h 35m
Air France
Deal found 2/3£174
Fri 27/317:35
RNS
-
LHR
1 stop4h 15m
Multiple Airlines
Fri 3/419:45
LHR
-
RNS
1 stop13h 35m
Multiple Airlines
Deal found 27/2£174

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 2 March 2026.

Round-trip from

£162

One-way from

£89

Popular in

December

Cheapest in

February

Average price

£156
Air France
  • Air France
  • 25/4-27/4
  • 2 total stops
  • 22h 25m total
  • Rennes to London
Search Deals
KLM
  • KLM
  • 31/3
  • 1 total stop
  • 21h 20m total
  • Rennes to London
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (£20 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£6 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 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 2 March 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

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Thu 2/4

14:25-20:55

1 stop7h 30m

London Heathrow

Sun 5/4

20:55-10:20

2 stops12h 25m

£193

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Sat 28/3

11:20-20:50

2 stops10h 30m

London Heathrow

Sat 4/4

06:30-16:35

1 stop9h 05m

£200

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Tue 23/6

14:25-20:55

1 stop7h 30m

London Heathrow

Fri 26/6

20:55-10:20

2 stops12h 25m

£232

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Thu 9/4

14:25-19:25

1 stop6h 00m

London Heathrow

Sun 12/4

20:55-10:20

2 stops12h 25m

£263

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Wed 6/5

14:30-17:35

1 stop4h 05m

London Heathrow

Fri 15/5

20:55-10:20

2 stops12h 25m

£277

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Fri 27/3

11:05-17:00

2 stops6h 55m

London Heathrow

Fri 3/4

20:55-10:20

2 stops12h 25m

£277

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Fri 12/6

14:25-20:55

1 stop7h 30m

London Heathrow

Tue 16/6

20:55-10:20

2 stops12h 25m

£282

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Thu 9/7

18:05-20:55

1 stop3h 50m

London Heathrow

Sat 11/7

06:30-17:35

1 stop10h 05m

£286

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Mon 16/3

17:10-20:50

1 stop4h 40m

London Heathrow

Sat 21/3

06:30-17:05

1 stop9h 35m

£295

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Fri 27/3

11:05-17:00

2 stops6h 55m

London Heathrow

Tue 31/3

20:55-10:20

2 stops12h 25m

£300

Flights are sorted by cheapest return flights first.

Deals found on 26/2

Showing 1-10 of 19 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 £48). Flying from Rennes to London Heathrow Airport in July is currently the most expensive (average of £174). 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 £193, 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 £48). Flying from Rennes to London Heathrow Airport in July is currently the most expensive (average of £174). 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
Croydon
Wembley
Luton
Northampton
Gatwick
Slough
Hounslow
Ilford
Hayes
Brentford
Colchester
Watford
Guildford
Kingston upon Thames
Eastbourne
Ipswich
Chelmsford
Swindon
Bedford

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

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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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