Find flights
When to book
FAQs

Cheap flights from Rennes to London Heathrow Airport from £95

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 6/6. Fares are subject to change and may not be available on all flights or dates of travel.
RNS — LHR
15 May — 22 May1
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 15 April 2026.

Tue 10/1117:35
RNS
-
LHR
1 stop4h 15m
Multiple Airlines
Sat 14/1119:20
LHR
-
RNS
1 stop14h 00m
Multiple Airlines
Deal found 11/4£170
Thu 3/1211:05
RNS
-
LHR
1 stop3h 40m
Air France
Mon 7/1219:20
LHR
-
RNS
1 stop14h 00m
Air France
Deal found 13/4£170
Fri 4/1211:05
RNS
-
LHR
1 stop21h 50m
Air France
Mon 7/1219:20
LHR
-
RNS
1 stop14h 00m
Air France
Deal found 14/4£178
Mon 15/611:05
RNS
-
LHR
1 stop6h 30m
Air France
Mon 22/619:45
LHR
-
RNS
1 stop13h 35m
Air France
Deal found 11/4£181
Thu 4/611:05
RNS
-
LHR
1 stop3h 40m
Air France
Sun 7/619:45
LHR
-
RNS
1 stop13h 35m
Air France
Deal found 14/4£181
Wed 13/511:05
RNS
-
LHR
1 stop3h 40m
Air France
Mon 18/519:45
LHR
-
RNS
1 stop13h 35m
Air France
Deal found 13/4£182
Fri 29/514:25
RNS
-
LHR
1 stop6h 00m
Multiple Airlines
Sun 31/519:45
LHR
-
RNS
1 stop13h 35m
Multiple Airlines
Deal found 14/4£183
Wed 27/514:25
RNS
-
LHR
1 stop6h 00m
Multiple Airlines
Wed 3/619:45
LHR
-
RNS
1 stop13h 35m
Multiple Airlines
Deal found 12/4£184
Sun 24/511:05
RNS
-
LHR
1 stop3h 40m
Air France
Sun 31/519:45
LHR
-
RNS
1 stop13h 35m
Air France
Deal found 13/4£184
Wed 6/511:05
RNS
-
LHR
1 stop6h 30m
Multiple Airlines
Fri 15/508:40
LHR
-
RNS
1 stop4h 15m
Multiple Airlines
Deal found 11/4£185
Sat 23/517:20
RNS
-
LHR
1 stop4h 35m
KLM
Thu 28/508:40
LHR
-
RNS
1 stop4h 10m
KLM
Deal found 14/4£187

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 15 April 2026.

Round-trip from

£181

One-way from

£95

Popular in

August

Cheapest in

January

Average price

£161
Air France
  • Air France
  • 15/6-22/6
  • 2 total stops
  • 20h 05m total
  • Rennes to London
Search Deals
KLM
  • KLM
  • 6/6
  • 1 total stop
  • 4h 35m total
  • Rennes to London
Search Deals
Highest demand for flights based on searches. 13% 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 April 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 15 April 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 28/5

14:20-17:35

1 stop4h 15m

London Heathrow

Sun 31/5

19:45-10:20

1 stop13h 35m

£184

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Thu 28/5

14:20-17:35

1 stop4h 15m

London Heathrow

Sun 31/5

11:45-10:20

2 stops21h 35m

£199
Fastest return journey

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Sun 24/5

14:25-17:50

1 stop4h 25m

London Heathrow

Sun 31/5

20:55-10:20

2 stops12h 25m

£206

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Wed 29/4

14:25-20:55

1 stop7h 30m

London Heathrow

Sun 3/5

20:55-10:20

2 stops12h 25m

£226

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Fri 22/5

14:25-20:55

1 stop7h 30m

London Heathrow

Sun 24/5

19:45-10:20

1 stop13h 35m

£248

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Thu 25/6

11:05-17:35

2 stops7h 30m

London Heathrow

Tue 30/6

20:55-10:20

2 stops12h 25m

£253

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Fri 26/6

14:25-20:55

1 stop7h 30m

London Heathrow

Mon 29/6

20:55-10:20

2 stops12h 25m

£254
Cheapest one-way

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Thu 21/5

10:30-18:35

2 stops9h 05m

£116

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Thu 4/6

11:05-16:35

1 stop6h 30m

£118

RennesLondon

RNS - LHR

RNSLHR

Rennes St Jacques

Wed 13/5

11:05-16:35

1 stop6h 30m

£119

Flights are sorted by cheapest return flights first.

Deals found on 13/4

Showing 1-10 of 18 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.

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 £39). Flying from Rennes to London Heathrow Airport in January 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.

  • How long is the flight from Rennes to London Heathrow Airport?

    For as low as £199, 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, May 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 January 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
Wembley
Croydon
Northampton
Hounslow
Luton
Gatwick
Slough
Ilford
Hayes
Brentford
Colchester
Watford
Kingston upon Thames
Romford
Eastbourne
Swindon
Chelmsford
Ipswich
Southend-on-Sea

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.