Find flights
When to book
FAQs

Cheap flights from London Heathrow Airport to Rennes from £83

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 17/12. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — RNS
18 Oct — 25 Oct1
1 adult
1 adult, Economy

Cheap flight deals from Heathrow to Rennes

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to Rennes (RNS). 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 September 2025.

Round-trip from

£174

One-way from

£83

Popular in

July

Cheapest in

March

Average price

£89
KLM
  • KLM
  • 14/11-16/11
  • 2 total stops
  • 8h 35m total
  • London to Rennes
Search Deals
17/12
  • 17/12
  • 1 total stop
  • 24h 20m total
  • London to Rennes
Search Deals
Highest demand for flights based on searches. 34% potential increase in price (£48 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease (£6 potential savings vs. average return price).
Search Deals
Average for round-trip flights in September 2025
Search Deals

Find flight deals from Heathrow to Rennes

Cheapest flights from Heathrow to Rennes
Explore the most affordable flight options available from Heathrow to Rennes. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 September 2025.

Fri 14/1111:45LHR - RNS
1 stop4h 15mKLM
Sun 16/1117:30RNS - LHR
1 stop4h 20mKLM
Deal found 16/9£174
Fri 5/1210:00LHR - RNS
1 stop6h 00mKLM
Sun 7/1217:35RNS - LHR
1 stop4h 15mKLM
Deal found 16/9£176
Fri 21/1110:00LHR - RNS
1 stop6h 00mKLM
Sat 22/1117:35RNS - LHR
1 stop4h 15mKLM
Deal found 17/9£177
Tue 28/1011:45LHR - RNS
1 stop4h 20mKLM
Fri 31/1017:30RNS - LHR
1 stop4h 20mKLM
Deal found 17/9£182
Tue 28/1009:00LHR - RNS
2 stops7h 40mMultiple Airlines
Fri 31/1017:30RNS - LHR
1 stop4h 20mMultiple Airlines
Deal found 17/9£188
Sat 4/1006:30LHR - RNS
1 stop8h 50mKLM
Wed 8/1016:35RNS - LHR
1 stop5h 20mKLM
Deal found 17/9£188
Sat 4/1008:40LHR - RNS
1 stop6h 40mMultiple Airlines
Wed 8/1014:25RNS - LHR
2 stops8h 00mMultiple Airlines
Deal found 17/9£189
Fri 7/1106:30LHR - RNS
1 stop9h 30mKLM
Sun 9/1117:30RNS - LHR
1 stop4h 20mKLM
Deal found 17/9£194
Sun 12/1009:00LHR - RNS
1 stop5h 35mMultiple Airlines
Wed 15/1016:35RNS - LHR
1 stop3h 50mMultiple Airlines
Deal found 16/9£205
Thu 30/1009:55LHR - RNS
1 stop9h 15mMultiple Airlines
Sun 2/1117:30RNS - LHR
1 stop16h 30mMultiple Airlines
Deal found 17/9£209
Sun 12/1009:00LHR - RNS
1 stop5h 35mAir France
Wed 15/1006:30RNS - LHR
2 stops26h 25mAir France
Deal found 16/9£210
Sat 1/1108:55LHR - RNS
1 stop24h 25mAir France
Sat 8/1111:20RNS - LHR
1 stop8h 00mAir France
Deal found 17/9£212

Cheapflights Fare Finder

 
Customise your flight search to find flights from Heathrow to Rennes 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 September 2025.
Use the filters below to find and compare flights from London Heathrow Airport to Rennes that are best for you.

Fly from

Heathrow

Fly to

Rennes

Route

Depart

Return

Price

LondonRennes

LHR - RNS

LHRRNS

London Heathrow

Fri 14/11

11:45-17:00

1 stop4h 15m

Rennes St Jacques

Sun 16/11

17:30-20:50

1 stop4h 20m

£174

LondonRennes

LHR - RNS

LHRRNS

London Heathrow

Fri 5/12

10:00-17:00

1 stop6h 00m

Rennes St Jacques

Sun 7/12

17:35-20:50

1 stop4h 15m

£176

LondonRennes

LHR - RNS

LHRRNS

London Heathrow

Fri 28/11

10:00-17:00

1 stop6h 00m

Rennes St Jacques

Mon 1/12

17:30-20:50

1 stop4h 20m

£177

LondonRennes

LHR - RNS

LHRRNS

London Heathrow

Fri 21/11

10:00-17:00

1 stop6h 00m

Rennes St Jacques

Sat 22/11

17:35-20:50

1 stop4h 15m

£177

LondonRennes

LHR - RNS

LHRRNS

London Heathrow

Fri 16/1

08:40-13:55

1 stop4h 15m

Rennes St Jacques

Sun 18/1

11:05-18:20

1 stop8h 15m

£179

LondonRennes

LHR - RNS

LHRRNS

London Heathrow

Tue 28/10

11:45-17:05

1 stop4h 20m

Rennes St Jacques

Fri 31/10

17:30-20:50

1 stop4h 20m

£182

LondonRennes

LHR - RNS

LHRRNS

London Heathrow

Tue 28/10

09:00-17:40

2 stops7h 40m

Rennes St Jacques

Fri 31/10

17:30-20:50

1 stop4h 20m

£188

LondonRennes

LHR - RNS

LHRRNS

London Heathrow

Fri 16/1

06:30-13:55

1 stop6h 25m

Rennes St Jacques

Sun 18/1

11:05-17:00

2 stops6h 55m

£191

LondonRennes

LHR - RNS

LHRRNS

London Heathrow

Sun 12/10

09:00-15:35

1 stop5h 35m

Rennes St Jacques

Wed 15/10

06:30-07:55

2 stops26h 25m

£210

LondonRennes

LHR - RNS

LHRRNS

London Heathrow

Fri 7/11

20:25-10:20

2 stops36h 55m

Rennes St Jacques

Sun 9/11

17:30-20:50

1 stop4h 20m

£230

Flights are sorted by cheapest return flights first.

Deals found on 16/9

Showing 1-10 of 20 results
1
2

Best time to book a flight from Heathrow to Rennes

Have a flexible travel schedule? Discover the best time to fly to Rennes from Heathrow 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 London Heathrow Airport to Rennes

What is the cheapest time of day to fly from LHR to RNS?

Find hourly flight availability from Heathrow to Rennes. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 18 September 2025.

It’s optimal to fly from London Heathrow Airport to Rennes at midday. By choosing this option you can save up to 15% on the cost of your flight, compared to a flight in the morning.

Related info for your journey

Find useful and relevant information for your journey from Heathrow to Rennes. 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 into for flights to Rennes from London Heathrow?

    Located just 4.0 mi from the city center, Rennes St Jacques is the airport most travelers will use when flying to Rennes from London Heathrow. Booking flights from London Heathrow to St Jacques (RNS) should be relatively easy as there are 0 daily inbound flights from London Heathrow from 0 different airlines.

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

    For as low as £174, KLM can have you in Rennes from London Heathrow Airport in 4h 15m. The distance from London Heathrow Airport to Rennes is about 242 mi.

  • Can I find deals for flights from Heathrow to Rennes that include hotel bookings?

    Yes. In addition to deals on Heathrow to Rennes flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Heathrow to Rennes?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Rennes.

  • Can I find deals for business class flights from Heathrow to Rennes?

    Yes. Cheapflights offers flight deals from Heathrow to Rennes 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

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.

Alternative routes for Heathrow to Rennes

See prices for flight routes from nearby airports that may be better suited for you.
Gatwick to Nantes flights
Stansted to Nantes flights
Heathrow to Nantes flights
Luton to Nantes flights
Southend to Nantes flights
London City to Nantes flights
Gatwick to Rennes flights
London City to Rennes flights
Luton to Rennes flights
Heathrow to Brest flights
London City to Brest flights
Stansted to Rennes flights
Luton to Brest flights
Stansted to Brest flights
Gatwick to Brest flights
Southend to Brest flights
Southend to Rennes flights
Stansted to Lorient flights
Luton to Lorient flights
Heathrow to Lorient flights
Gatwick to Lorient flights
London City to Lorient flights
Stansted to Dinard flights
Gatwick to Dinard flights
London City to Quimper flights
Gatwick to Quimper flights
Heathrow to Quimper flights
Luton to Quimper flights

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 Heathrow to Rennes?

When you search for this flight from Heathrow to Rennes, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from Heathrow to Rennes?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Rennes from Heathrow.

Can Cheapflights find flights from Heathrow to Rennes with no change fees?

Need flexible booking options for your flight to Rennes from Heathrow? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Heathrow to Rennes become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Rennes from Heathrow today and book when prices fit your budget.

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.