Find flights
When to book
FAQs

Cheap flights from Rennes to London Heathrow Airport from £91

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 31/12. Fares are subject to change and may not be available on all flights or dates of travel.
RNS — LHR
22 Nov — 29 Nov1
1 adult
1 adult, Economy

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 23 October 2025.

Round-trip from

£167

One-way from

£91

Popular in

September

Cheapest in

June

Average price

£248
10/12-13/12
  • 10/12-13/12
  • 3 total stops
  • 32h 55m total
  • Rennes to London
Search Deals
KLM
  • KLM
  • 31/12
  • 1 total stop
  • 4h 20m total
  • Rennes to London
Search Deals
Highest demand for flights based on searches. 23% potential increase in price (£44 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£6 potential savings vs. average return price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

Find 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 23 October 2025.

Wed 10/1217:05RNS - LHR
2 stops17h 05mMultiple Airlines
Sat 13/1220:50LHR - RNS
1 stop15h 50mMultiple Airlines
Deal found 21/10£167
Mon 10/1111:05RNS - LHR
1 stop6h 30mAir France
Thu 13/1119:20LHR - RNS
1 stop14h 00mAir France
Deal found 22/10£169
Fri 14/1111:05RNS - LHR
1 stop3h 40mAir France
Mon 17/1119:20LHR - RNS
1 stop14h 00mAir France
Deal found 21/10£169
Wed 5/1111:05RNS - LHR
1 stop3h 40mAir France
Mon 17/1119:20LHR - RNS
1 stop14h 00mAir France
Deal found 22/10£171
Thu 13/1111:05RNS - LHR
1 stop6h 30mAir France
Sun 16/1119:20LHR - RNS
1 stop14h 00mAir France
Deal found 21/10£172
Fri 5/1217:30RNS - LHR
1 stop4h 20mKLM
Mon 8/1211:45LHR - RNS
1 stop4h 15mKLM
Deal found 21/10£173
Thu 20/1117:35RNS - LHR
1 stop4h 15mMultiple Airlines
Thu 27/1109:55LHR - RNS
1 stop9h 15mMultiple Airlines
Deal found 21/10£174
Sat 22/1111:20RNS - LHR
1 stop6h 15mAir France
Sun 23/1115:00LHR - RNS
1 stop18h 20mAir France
Deal found 21/10£176
Tue 18/1117:35RNS - LHR
1 stop4h 15mKLM
Tue 25/1106:30LHR - RNS
1 stop9h 35mKLM
Deal found 21/10£177
Thu 20/1117:35RNS - LHR
1 stop4h 15mKLM
Thu 27/1108:40LHR - RNS
1 stop7h 25mKLM
Deal found 22/10£177
Thu 20/1117:35RNS - LHR
1 stop4h 15mKLM
Sat 22/1106:30LHR - RNS
1 stop9h 35mKLM
Deal found 21/10£178
Fri 5/1217:30RNS - LHR
1 stop4h 20mKLM
Fri 12/1206:30LHR - RNS
1 stop9h 30mKLM
Deal found 21/10£180

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 23 October 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

Fri 13/3

17:35-20:50

1 stop4h 15m

London Heathrow

Sun 15/3

08:40-16:40

1 stop7h 00m

£177

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Sat 22/11

17:35-20:50

1 stop4h 15m

London Heathrow

Tue 25/11

10:00-17:05

1 stop6h 05m

£177

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Fri 5/12

17:30-20:50

1 stop4h 20m

London Heathrow

Mon 8/12

10:00-17:00

1 stop6h 00m

£178

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Tue 2/12

17:35-20:50

1 stop4h 15m

London Heathrow

Fri 5/12

10:00-17:00

1 stop6h 00m

£178

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Fri 20/2

14:25-20:50

1 stop7h 25m

London Heathrow

Tue 24/2

11:45-17:05

1 stop4h 20m

£178

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Sat 6/12

17:35-20:50

1 stop4h 15m

London Heathrow

Wed 10/12

11:45-17:00

1 stop4h 15m

£178

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Fri 13/2

14:25-19:15

1 stop5h 50m

London Heathrow

Wed 18/2

06:30-13:55

1 stop6h 25m

£178

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Fri 28/11

17:30-20:50

1 stop4h 20m

London Heathrow

Wed 3/12

10:00-17:00

1 stop6h 00m

£178

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Mon 8/12

17:30-20:50

1 stop4h 20m

London Heathrow

Fri 12/12

08:40-17:00

1 stop7h 20m

£178

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Fri 16/1

14:25-19:15

1 stop5h 50m

London Heathrow

Mon 19/1

11:45-17:00

1 stop4h 15m

£181

Flights are sorted by cheapest return flights first.

Deals found on 21/10

Showing 1-10 of 22 results
1
2
3

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, March is the cheapest month in which you can book a flight from Rennes to London Heathrow Airport (average of £39). Flying from Rennes to London Heathrow Airport in August is currently the most expensive (average of £183). 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 £177, KLM can have you in London Heathrow Airport from Rennes in 4h 15m. 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, March is the cheapest month in which you can book a flight from Rennes to London Heathrow Airport (average of £39). Flying from Rennes to London Heathrow Airport in August is currently the most expensive (average of £183). 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
Slough
Gatwick
Hounslow
Northampton
Luton
Wembley
Ilford
Deal
Hayes
Colchester
Watford
Crawley
Winchester
Swindon
Chichester
Romford
Ipswich
Bedford

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.