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Cheap flights from London Heathrow Airport to Rennes from £70

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 11/12. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — RNS
19 Dec — 26 Dec1
1 adult
1 adult, Economy, 0 bags

Find 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 19 November 2025.

Wed 3/1208:40LHR - RNS
1 stop7h 20mKLM
Sun 7/1217:30RNS - LHR
1 stop16h 30mKLM
Deal found 18/11£177
Mon 1/1219:20LHR - RNS
1 stop14h 00mAir France
Sun 7/1211:05RNS - LHR
1 stop21h 55mAir France
Deal found 17/11£183
Wed 3/1219:25LHR - RNS
1 stop13h 55mAir France
Sun 7/1211:05RNS - LHR
1 stop21h 50mAir France
Deal found 18/11£186
Tue 2/1209:00LHR - RNS
2 stops7h 40mAir France
Sat 13/1211:20RNS - LHR
1 stop8h 00mAir France
Deal found 18/11£192
Mon 8/1219:20LHR - RNS
1 stop14h 00mAir France
Fri 12/1211:05RNS - LHR
1 stop11h 20mAir France
Deal found 17/11£195
Tue 2/1209:00LHR - RNS
2 stops7h 40mMultiple Airlines
Sat 13/1211:20RNS - LHR
2 stops10h 30mMultiple Airlines
Deal found 18/11£220
Sat 22/1108:40LHR - RNS
1 stop7h 25mKLM
Sun 23/1111:05RNS - LHR
2 stops6h 00mKLM
Deal found 17/11£246
Tue 18/1119:20LHR - RNS
1 stop14h 00mAir France
Tue 25/1111:05RNS - LHR
1 stop6h 30mAir France
Deal found 17/11£248
Mon 8/1211:45LHR - RNS
2 stops21h 35mMultiple Airlines
Fri 12/1211:05RNS - LHR
1 stop11h 20mMultiple Airlines
Deal found 17/11£251
Mon 1/1210:00LHR - RNS
2 stops23h 20mMultiple Airlines
Sun 7/1211:05RNS - LHR
1 stop21h 50mMultiple Airlines
Deal found 17/11£262
Wed 19/1119:25LHR - RNS
1 stop13h 55mAir France
Sun 23/1111:05RNS - LHR
1 stop21h 50mAir France
Deal found 18/11£265

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 19 November 2025.

Round-trip from

£173

One-way from

£70

Popular in

July

Cheapest in

March

Average price

£82
KLM
  • KLM
  • 14/3-18/3
  • 2 total stops
  • 11h 45m total
  • London to Rennes
Search Deals
11/12
  • 11/12
  • 1 total stop
  • 9h 15m total
  • London to Rennes
Search Deals
Highest demand for flights based on searches. 34% potential increase in price (£51 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 November 2025
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 19 November 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

Wed 3/12

08:40-17:00

1 stop7h 20m

Rennes St Jacques

Sun 7/12

17:30-09:00

1 stop16h 30m

£177

LondonRennes

LHR - RNS

LHRRNS

London Heathrow

Mon 1/12

19:20-10:20

1 stop14h 00m

Rennes St Jacques

Sun 7/12

11:05-08:00

1 stop21h 55m

£183

LondonRennes

LHR - RNS

LHRRNS

London Heathrow

Tue 2/12

19:20-10:20

1 stop14h 00m

Rennes St Jacques

Sat 13/12

11:20-18:20

1 stop8h 00m

£183

LondonRennes

LHR - RNS

LHRRNS

London Heathrow

Wed 29/4

08:40-16:00

1 stop6h 20m

Rennes St Jacques

Wed 6/5

16:35-20:55

1 stop5h 20m

£185

LondonRennes

LHR - RNS

LHRRNS

London Heathrow

Wed 3/12

19:25-10:20

1 stop13h 55m

Rennes St Jacques

Sun 7/12

11:05-07:55

1 stop21h 50m

£186

LondonRennes

LHR - RNS

LHRRNS

London Heathrow

Thu 30/4

06:30-16:00

1 stop8h 30m

Rennes St Jacques

Wed 6/5

16:35-19:25

1 stop3h 50m

£192

LondonRennes

LHR - RNS

LHRRNS

London Heathrow

Fri 9/1

06:30-13:55

1 stop6h 25m

Rennes St Jacques

Mon 12/1

11:05-18:20

1 stop8h 15m

£198

LondonRennes

LHR - RNS

LHRRNS

London Heathrow

Wed 29/4

08:40-16:00

1 stop6h 20m

Rennes St Jacques

Tue 5/5

16:35-19:25

1 stop3h 50m

£201

LondonRennes

LHR - RNS

LHRRNS

London Heathrow

Fri 9/1

08:40-13:55

1 stop4h 15m

Rennes St Jacques

Sun 11/1

11:05-16:05

2 stops6h 00m

£203

LondonRennes

LHR - RNS

LHRRNS

London Heathrow

Wed 29/4

06:30-16:00

1 stop8h 30m

Rennes St Jacques

Thu 7/5

16:35-19:25

1 stop3h 50m

£206

Flights are sorted by cheapest return flights first.

Deals found on 17/11

Showing 1-10 of 19 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 £31). Flying from London Heathrow Airport to Rennes in February is currently the most expensive (average of £325). 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.

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 19 November 2025.

It’s optimal to fly from London Heathrow Airport to Rennes in the afternoon. By choosing this option you can save up to 50% on the cost of your flight, compared to a flight in the morning.

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 19 November 2025.
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
1,846 reviews
Check prices

Crew

7.6

Comfort

6.7

Entertainment

5.5

Overall

6.9

Boarding

6.7

Food

5.9

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
1,846 reviews
easyJet
6.9
Okay
1,846 reviews
Check prices

Crew

7.6

Comfort

6.7

Entertainment

5.5

Overall

6.9

Boarding

6.7

Food

5.9

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 £177, KLM can have you in Rennes from London Heathrow Airport in 7h 20m. The distance from London Heathrow Airport to Rennes is about 242 mi. This flight may include one or multiple stops.

  • 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 £142.

  • 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 £31). Flying from London Heathrow Airport to Rennes in February is currently the most expensive (average of £325). 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 19 November 2025.
AirlineCheapestAverageFlexibilityOn-time
easyJetCheapest£142Average£196FlexibilityNo 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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