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Cheap flights from Rennes to London Heathrow Airport from £86

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 19/9. Fares are subject to change and may not be available on all flights or dates of travel.
RNS — LHR
20 Aug — 27 Aug1
1 adult

Cheap 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 15 August 2025.

Round-trip from

£176

One-way from

£86

Popular in

August

Cheapest in

June

Average price

£311
20/11-23/11
  • 20/11-23/11
  • 2 total stops
  • 17h 50m total
  • Rennes to London
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19/9
  • 19/9
  • 1 total stop
  • 13h 05m total
  • Rennes to London
Search Deals
Highest demand for flights based on searches. 22% potential increase in price (£42 potential increase over avg. return price).
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Cheapest flight prices on average. 6% potential price decrease (£9 potential savings vs. average return price).
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Average for round-trip flights in August 2025
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Find flight deals from Rennes to Heathrow

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 15 August 2025.

Thu 20/1120:45RNS - LHR
1 stop12h 35mMultiple Airlines
Sun 23/1107:25LHR - RNS
1 stop5h 15mMultiple Airlines
Deal found 14/8£176
Sat 11/1007:10RNS - LHR
1 stop4h 20mAir France
Sat 18/1019:45LHR - RNS
1 stop12h 50mAir France
Deal found 13/8£176
Thu 27/1111:05RNS - LHR
1 stop6h 30mAir France
Sun 30/1119:20LHR - RNS
1 stop14h 00mAir France
Deal found 14/8£177
Mon 15/1217:30RNS - LHR
1 stop4h 20mKLM
Thu 18/1208:40LHR - RNS
1 stop7h 25mKLM
Deal found 13/8£184
Sun 9/1117:35RNS - LHR
1 stop4h 15mKLM
Mon 17/1110:00LHR - RNS
1 stop6h 00mKLM
Deal found 15/8£184
Thu 4/906:00RNS - LHR
2 stops8h 45mMultiple Airlines
Sun 7/908:40LHR - RNS
1 stop6h 50mMultiple Airlines
Deal found 14/8£185
Tue 14/1016:35RNS - LHR
1 stop5h 20mMultiple Airlines
Wed 22/1006:15LHR - RNS
1 stop3h 50mMultiple Airlines
Deal found 14/8£186
Fri 26/906:30RNS - LHR
1 stop11h 05mMultiple Airlines
Sun 28/911:45LHR - RNS
1 stop3h 45mMultiple Airlines
Deal found 15/8£187
Sat 20/1217:35RNS - LHR
1 stop15h 05mKLM
Wed 24/1206:30LHR - RNS
1 stop9h 30mKLM
Deal found 13/8£187
Wed 24/906:30RNS - LHR
2 stops13h 05mMultiple Airlines
Sat 27/911:45LHR - RNS
1 stop3h 35mMultiple Airlines
Deal found 13/8£188
Fri 26/906:30RNS - LHR
2 stops12h 05mKLM
Sun 28/911:45LHR - RNS
1 stop3h 45mKLM
Deal found 15/8£189
Fri 3/1006:30RNS - LHR
2 stops10h 45mKLM
Fri 10/1017:10LHR - RNS
1 stop22h 10mKLM
Deal found 14/8£190

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 15 August 2025.
Use the filters below to find and compare flights from Rennes to London Heathrow Airport that are best for you.

Fly from

Rennes

Fly to

Heathrow

Route

Depart

Return

Price

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Thu 20/11

20:45-08:20

1 stop12h 35m

London Heathrow

Sun 23/11

07:25-13:40

1 stop5h 15m

£176

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Mon 12/1

11:05-18:20

1 stop8h 15m

London Heathrow

Sun 18/1

19:20-10:20

1 stop14h 00m

£176

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Thu 27/11

11:05-16:35

1 stop6h 30m

London Heathrow

Mon 1/12

19:20-10:20

1 stop14h 00m

£176

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Sat 11/10

07:10-10:30

1 stop4h 20m

London Heathrow

Sat 18/10

19:45-09:35

1 stop12h 50m

£176

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Thu 27/11

11:05-16:35

1 stop6h 30m

London Heathrow

Sun 30/11

19:20-10:20

1 stop14h 00m

£177

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Fri 28/11

17:30-20:50

1 stop4h 20m

London Heathrow

Sun 30/11

08:40-17:00

1 stop7h 20m

£184

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Sun 14/12

17:35-20:50

1 stop4h 15m

London Heathrow

Wed 17/12

11:45-17:00

1 stop4h 15m

£184

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Mon 15/12

17:30-20:50

1 stop4h 20m

London Heathrow

Thu 18/12

08:40-17:05

1 stop7h 25m

£184

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Mon 26/1

17:30-20:50

1 stop4h 20m

London Heathrow

Fri 30/1

08:40-13:55

1 stop4h 15m

£184

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Thu 2/10

16:35-20:55

1 stop5h 20m

London Heathrow

Sun 5/10

06:30-16:30

1 stop9h 00m

£184

Flights are sorted by cheapest return flights first.

Deals found on 14/8

Showing 1-10 of 20 results
1
2

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, January is the cheapest month in which you can book a flight from Rennes to London Heathrow Airport (average of £112). Flying from Rennes to London Heathrow Airport in August is currently the most expensive (average of £164). 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.

  • 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, January is the cheapest month in which you can book a flight from Rennes to London Heathrow Airport (average of £112). Flying from Rennes to London Heathrow Airport in August is currently the most expensive (average of £164). 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
Hounslow
Gatwick
Slough
Northampton
Deal
Luton
Wembley
Crawley
Ilford
Hayes
Ipswich
Southend-on-Sea
Winchester
Folkestone
Eastbourne
Maidstone
Watford
Chichester

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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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