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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 3/9. Fares are subject to change and may not be available on all flights or dates of travel.
RNS — LHR
28 Jul — 4 Aug1
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 28 June 2026.

Wed 16/914:25
RNS
-
LHR
1 stop6h 00m
Multiple Airlines
Sun 20/919:45
LHR
-
RNS
1 stop13h 35m
Multiple Airlines
Deal found 27/6£174
Sat 10/1017:20
RNS
-
LHR
1 stop4h 35m
KLM
Wed 4/1106:30
LHR
-
RNS
1 stop8h 45m
KLM
Deal found 27/6£175
Thu 5/1111:05
RNS
-
LHR
1 stop3h 40m
Air France
Sun 8/1119:20
LHR
-
RNS
1 stop14h 00m
Air France
Deal found 27/6£176
Sat 3/1011:05
RNS
-
LHR
1 stop11h 20m
Air France
Sun 4/1019:45
LHR
-
RNS
1 stop13h 35m
Air France
Deal found 26/6£178
Thu 27/818:05
RNS
-
LHR
1 stop3h 50m
Multiple Airlines
Wed 2/919:45
LHR
-
RNS
1 stop13h 35m
Multiple Airlines
Deal found 28/6£183
Thu 3/914:25
RNS
-
LHR
1 stop4h 10m
Multiple Airlines
Tue 8/919:45
LHR
-
RNS
1 stop13h 35m
Multiple Airlines
Deal found 25/6£183
Thu 6/811:05
RNS
-
LHR
1 stop21h 50m
Air France
Mon 10/819:45
LHR
-
RNS
1 stop13h 35m
Air France
Deal found 28/6£184
Thu 13/818:05
RNS
-
LHR
1 stop3h 50m
Multiple Airlines
Mon 17/819:45
LHR
-
RNS
1 stop13h 35m
Multiple Airlines
Deal found 26/6£186
Thu 24/914:25
RNS
-
LHR
1 stop7h 30m
KLM
Wed 30/920:55
LHR
-
RNS
2 stops12h 25m
KLM
Deal found 25/6£188
Wed 16/914:25
RNS
-
LHR
1 stop6h 00m
KLM
Sun 20/920:55
LHR
-
RNS
2 stops12h 25m
KLM
Deal found 27/6£189
Fri 17/718:05
RNS
-
LHR
1 stop3h 50m
KLM
Tue 21/719:15
LHR
-
RNS
2 stops14h 05m
KLM
Deal found 26/6£189
Thu 5/1111:05
RNS
-
LHR
2 stops6h 55m
KLM
Sun 8/1106:30
LHR
-
RNS
1 stop10h 10m
KLM
Deal found 27/6£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 28 June 2026.

Round-trip from

£174

One-way from

£89

Popular in

August

Cheapest in

January

Average price

£114
Air France
  • Air France
  • 16/9-20/9
  • 2 total stops
  • 19h 35m total
  • Rennes to London
Search Deals
KLM
  • KLM
  • 3/9
  • 1 total stop
  • 6h 00m total
  • Rennes to London
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£13 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£4 potential savings vs. average return price).
Search Deals
Average for round-trip flights in June 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 28 June 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

Fri 27/11

16:45-20:50

1 stop5h 05m

London Heathrow

Sun 29/11

06:30-17:40

1 stop10h 10m

£195

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Fri 11/9

14:25-19:25

1 stop6h 00m

London Heathrow

Sun 13/9

20:55-10:20

2 stops12h 25m

£204

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Wed 28/10

16:45-20:50

1 stop5h 05m

London Heathrow

Sun 1/11

08:40-17:40

1 stop8h 00m

£218

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Mon 26/10

16:45-20:50

1 stop5h 05m

London Heathrow

Thu 29/10

06:30-16:15

1 stop8h 45m

£248
Fastest return journey

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Thu 20/8

18:05-20:55

1 stop3h 50m

London Heathrow

Thu 27/8

08:40-17:35

1 stop7h 55m

£258
Cheapest one-way

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Sat 12/9

17:20-20:55

1 stop4h 35m

£92

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Fri 11/9

14:25-17:35

1 stop4h 10m

£92

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Thu 10/9

14:25-20:55

1 stop7h 30m

£92

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Wed 9/9

14:25-17:35

1 stop4h 10m

£98
Fastest single journey

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Fri 24/7

18:05-20:55

1 stop3h 50m

£122

Flights are sorted by cheapest return flights first.

Deals found on 27/6

Showing 1-10 of 13 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.

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 £195, KLM can have you in London Heathrow Airport from Rennes in 5h 05m. 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.

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
Hounslow
Milton Keynes
Luton
Wembley
Gatwick
Croydon
Slough
Ilford
Hayes
Brentford
Colchester
Northampton
Watford
Kingston upon Thames
Swindon
Eastbourne
Poole
Southall
Aylesbury
Romford

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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?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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