Find flights
When to book
FAQs

Cheap flights from Rennes to London Heathrow Airport from £88

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 26/8. Fares are subject to change and may not be available on all flights or dates of travel.
RNS — LHR
17 Aug — 24 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 18 July 2026.

Thu 27/818:05
RNS
-
LHR
1 stop3h 50m
Multiple Airlines
Mon 31/819:45
LHR
-
RNS
1 stop13h 35m
Multiple Airlines
Deal found 14/7£170
Wed 7/1014:25
RNS
-
LHR
1 stop6h 00m
KLM
Sun 11/1008:40
LHR
-
RNS
1 stop4h 15m
KLM
Deal found 14/7£171
Tue 25/818:05
RNS
-
LHR
1 stop3h 50m
Multiple Airlines
Mon 31/819:45
LHR
-
RNS
1 stop13h 35m
Multiple Airlines
Deal found 14/7£172
Thu 1/1014:25
RNS
-
LHR
1 stop4h 10m
KLM
Thu 8/1006:30
LHR
-
RNS
1 stop6h 25m
KLM
Deal found 15/7£172
Thu 27/818:05
RNS
-
LHR
1 stop3h 50m
Multiple Airlines
Sat 5/906:15
LHR
-
RNS
1 stop5h 40m
Multiple Airlines
Deal found 15/7£174
Fri 4/914:25
RNS
-
LHR
1 stop7h 30m
Multiple Airlines
Sun 6/919:45
LHR
-
RNS
1 stop13h 35m
Multiple Airlines
Deal found 16/7£175
Wed 29/711:05
RNS
-
LHR
1 stop3h 40m
Air France
Wed 12/819:45
LHR
-
RNS
1 stop13h 35m
Air France
Deal found 16/7£175
Thu 24/911:05
RNS
-
LHR
1 stop21h 50m
Air France
Mon 28/919:45
LHR
-
RNS
1 stop13h 35m
Air France
Deal found 14/7£177
Fri 4/914:25
RNS
-
LHR
1 stop4h 10m
Multiple Airlines
Mon 7/919:45
LHR
-
RNS
1 stop13h 35m
Multiple Airlines
Deal found 13/7£178
Fri 20/1116:45
RNS
-
LHR
1 stop5h 05m
KLM
Mon 23/1106:30
LHR
-
RNS
1 stop8h 20m
KLM
Deal found 15/7£180

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 18 July 2026.

Round-trip from

£170

One-way from

£88

Popular in

October

Cheapest in

February

Average price

£212
Air France
  • Air France
  • 27/8-31/8
  • 2 total stops
  • 17h 25m total
  • Rennes to London
Search Deals
KLM
  • KLM
  • 26/8
  • 1 total stop
  • 4h 05m total
  • Rennes to London
Search Deals
Highest demand for flights based on searches. 30% potential increase in price (£78 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 14% potential price decrease (£23 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 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 18 July 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

Thu 15/10

14:25-19:25

1 stop6h 00m

London Heathrow

Wed 21/10

08:40-13:55

1 stop4h 15m

£172

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Mon 30/11

16:45-20:50

1 stop5h 05m

London Heathrow

Sun 6/12

06:30-17:40

1 stop10h 10m

£172

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Mon 30/11

16:45-20:50

1 stop5h 05m

London Heathrow

Sat 5/12

06:30-17:40

1 stop10h 10m

£172

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Sun 15/11

18:10-20:50

1 stop3h 40m

London Heathrow

Sun 29/11

06:30-17:40

1 stop10h 10m

£188
Fastest return journey

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Fri 11/9

14:25-17:35

1 stop4h 10m

London Heathrow

Sun 13/9

08:40-13:55

1 stop4h 15m

£199

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Wed 2/9

14:25-19:25

1 stop6h 00m

London Heathrow

Fri 11/9

20:55-10:20

2 stops12h 25m

£207

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Fri 20/11

11:05-17:00

2 stops6h 55m

London Heathrow

Wed 25/11

08:40-15:50

1 stop6h 10m

£226

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Fri 23/10

14:25-19:25

1 stop6h 00m

London Heathrow

Fri 6/11

11:45-16:15

1 stop3h 30m

£250

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Tue 11/8

18:05-20:55

1 stop3h 50m

London Heathrow

Fri 14/8

20:55-10:20

2 stops12h 25m

£256

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Sun 25/10

18:10-20:50

1 stop3h 40m

London Heathrow

Fri 6/11

08:40-16:15

1 stop6h 35m

£270

Flights are sorted by cheapest return flights first.

Deals found on 13/7

Showing 1-10 of 19 resultsSorted by cheapest first
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.

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 £172, KLM can have you in London Heathrow Airport from Rennes in 6h. 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
Gatwick
Wembley
Slough
Ilford
Croydon
Hayes
Brentford
Colchester
Northampton
Watford
Eastbourne
Swindon
Southend-on-Sea
Poole
Kingston upon Thames
Southall
Aylesbury

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Rennes to Heathrow?

Cheapflights helps you search for flights from Rennes to Heathrow via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

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?

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!

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.