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Cheap flights from London Heathrow Airport to Rennes from £87

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 3/3. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — RNS
27 Feb — 6 Mar1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Heathrow to Rennes

Enter your travel dates to find the best prices.

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 28 January 2026.

Fri 6/314:45
LHR
-
RNS
1 stop18h 50m
Air France
Sun 8/311:05
RNS
-
LHR
1 stop3h 40m
Air France
Deal found 26/1£162
Fri 20/220:25
LHR
-
RNS
1 stop19h 40m
KLM
Mon 23/217:10
RNS
-
LHR
1 stop4h 40m
KLM
Deal found 26/1£164
Mon 16/206:30
LHR
-
RNS
1 stop9h 30m
KLM
Mon 23/217:10
RNS
-
LHR
1 stop4h 40m
KLM
Deal found 27/1£166
Mon 23/206:30
LHR
-
RNS
1 stop9h 10m
KLM
Mon 2/317:10
RNS
-
LHR
1 stop4h 40m
KLM
Deal found 26/1£167
Thu 12/310:00
LHR
-
RNS
1 stop6h 05m
KLM
Thu 19/317:35
RNS
-
LHR
1 stop4h 15m
KLM
Deal found 26/1£169
Sat 7/319:20
LHR
-
RNS
1 stop14h 00m
Multiple Airlines
Sun 8/317:10
RNS
-
LHR
1 stop4h 40m
Multiple Airlines
Deal found 27/1£173
Mon 23/210:00
LHR
-
RNS
1 stop5h 40m
Multiple Airlines
Mon 2/310:35
RNS
-
LHR
2 stops8h 45m
Multiple Airlines
Deal found 26/1£174
Mon 23/211:45
LHR
-
RNS
1 stop3h 55m
KLM
Fri 27/217:35
RNS
-
LHR
1 stop4h 15m
KLM
Deal found 27/1£175
Thu 12/306:30
LHR
-
RNS
1 stop9h 35m
Multiple Airlines
Thu 19/310:35
RNS
-
LHR
2 stops8h 45m
Multiple Airlines
Deal found 26/1£178
Mon 2/310:00
LHR
-
RNS
1 stop5h 40m
KLM
Fri 6/317:35
RNS
-
LHR
1 stop4h 15m
KLM
Deal found 27/1£179
Sat 7/306:30
LHR
-
RNS
1 stop9h 35m
KLM
Sun 8/311:05
RNS
-
LHR
2 stops6h 00m
KLM
Deal found 27/1£180

Find 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 28 January 2026.

Round-trip from

£162

One-way from

£87

Popular in

July

Cheapest in

March

Average price

£90
Air France
  • Air France
  • 6/3-8/3
  • 2 total stops
  • 22h 30m total
  • London to Rennes
Search Deals
KLM
  • KLM
  • 3/3
  • 1 total stop
  • 4h 20m total
  • London to Rennes
Search Deals
Highest demand for flights based on searches. 36% potential increase in price (£49 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease (£6 potential savings vs. average return price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

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 28 January 2026.
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 20/2

20:25-17:05

1 stop19h 40m

Rennes St Jacques

Mon 23/2

17:10-20:50

1 stop4h 40m

£164

LondonRennes

LHR - RNS

LHRRNS

London Heathrow

Mon 23/2

06:30-16:40

1 stop9h 10m

Rennes St Jacques

Mon 2/3

17:10-20:50

1 stop4h 40m

£167

LondonRennes

LHR - RNS

LHRRNS

London Heathrow

Thu 12/3

06:30-17:05

1 stop9h 35m

Rennes St Jacques

Thu 19/3

17:35-20:50

1 stop4h 15m

£171

LondonRennes

LHR - RNS

LHRRNS

London Heathrow

Mon 23/2

10:00-16:40

1 stop5h 40m

Rennes St Jacques

Mon 2/3

10:35-18:20

2 stops8h 45m

£174

LondonRennes

LHR - RNS

LHRRNS

London Heathrow

Thu 12/3

06:30-17:05

1 stop9h 35m

Rennes St Jacques

Thu 19/3

10:35-18:20

2 stops8h 45m

£178

LondonRennes

LHR - RNS

LHRRNS

London Heathrow

Mon 2/3

10:00-16:40

1 stop5h 40m

Rennes St Jacques

Fri 6/3

17:35-20:50

1 stop4h 15m

£179

LondonRennes

LHR - RNS

LHRRNS

London Heathrow

Mon 27/4

19:45-10:20

1 stop13h 35m

Rennes St Jacques

Thu 7/5

11:05-07:55

1 stop21h 50m

£184

LondonRennes

LHR - RNS

LHRRNS

London Heathrow

Sat 7/3

20:50-13:40

1 stop15h 50m

Rennes St Jacques

Sun 8/3

17:10-20:50

1 stop4h 40m

£186

LondonRennes

LHR - RNS

LHRRNS

London Heathrow

Mon 27/4

19:45-10:20

1 stop13h 35m

Rennes St Jacques

Thu 7/5

11:05-17:35

2 stops7h 30m

£199

LondonRennes

LHR - RNS

LHRRNS

London Heathrow

Thu 12/3

08:55-17:40

2 stops7h 45m

Rennes St Jacques

Thu 19/3

10:35-18:20

2 stops8h 45m

£221

Flights are sorted by cheapest return flights first.

Deals found on 26/1

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 month to book a flight from London Heathrow Airport to Rennes?

Currently, August is the cheapest month in which you can book a flight from London Heathrow Airport to Rennes (average of £30). Flying from London Heathrow Airport to Rennes in February is currently the most expensive (average of £311). 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.

Reviews of airlines servicing Rennes

Get insights into the airlines that provide service to Rennes. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Rennes. Reviews last updated 28 January 2026.
Get a feel of what it's like to fly with easyJet from London Heathrow Airport to Rennes by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
easyJet
6.9
Okay
1,866 reviews
Check prices

Entertainment

5.5

Crew

7.6

Food

5.9

Overall

6.9

Comfort

6.7

Boarding

6.7

Reviews

1 / 20
10.0
Excellent

muhon,Oct 2025

MAN - GVA

Service and quality and the price is great .definitely recomondable .
easyJet
6.9
Okay
1,866 reviews
easyJet
6.9
Okay
1,866 reviews
Check prices

Entertainment

5.5

Crew

7.6

Food

5.9

Overall

6.9

Comfort

6.7

Boarding

6.7

Reviews

1 / 20
10.0
Excellent

muhon,Oct 2025

MAN - GVA

Service and quality and the price is great .definitely recomondable .

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 1 airline.

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

    For as low as £164, KLM can have you in Rennes from London Heathrow Airport in 19h 40m. The distance from London Heathrow Airport to Rennes is about 242 mi.

  • What is the cheapest airline to fly from London Heathrow Airport to Rennes round-trip?

    Cheapflights users have booked flights from London Heathrow Airport to Rennes round-trip from £135.

  • 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.

  • What is the cheapest month to book a flight from London Heathrow Airport to Rennes?

    Currently, August is the cheapest month in which you can book a flight from London Heathrow Airport to Rennes (average of £30). Flying from London Heathrow Airport to Rennes in February is currently the most expensive (average of £311). 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

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Alternative routes for Heathrow to Rennes

See prices for flight routes from nearby airports that may be better suited for you.
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Top airline flying from Heathrow to Rennes

Discover the top airline that operate flights from Heathrow to Rennes. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 28 January 2026.
AirlineCheapestAverageFlexibilityOn-time
easyJetCheapest£135Average£188FlexibilityNo cancel feeOn-time86%
Search easyJet 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.

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