In terms of precipitation, rainfall in Grenoble ranges from 50.0 - 76.0 inches per month. May is typically the wettest month, when rainfall can reach 76.0 mm. March is typically the driest time to visit Grenoble when rainfall is around 50.0 mm.

If weather is an important factor for your trip to Grenoble, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 21.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 2.0 C).

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

When flying from London Heathrow Airport to Grenoble, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

What airport do you fly into for flights to Grenoble from London Heathrow?

Grenoble (GNB) is the airport you will fly into if you book a flight from London Heathrow to Grenoble. You should not have trouble finding flights to Grenoble from London Heathrow; the airport handles an average of 0 inbound flights from London Heathrow per day. You should also have plenty of airline options to choose from since 0 airlines have flights to the Grenoble airport from London Heathrow. It is only a 22.6 mi journey from Grenoble (GNB) to Grenoble’s city center.

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

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

How can I find direct flights from Heathrow to Grenoble?

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

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

Yes. Cheapflights offers flight deals from Heathrow to Grenoble by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

£99+ Cheap Flights from London Heathrow Airport to Grenoble

Cheap flight deals from Heathrow to Grenoble

Enter your travel dates to find the best prices.

Cheapest

Best

One-way

Cheapest flights from Heathrow to Grenoble
Explore the most affordable flight options available from Heathrow to Grenoble. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 30 September 2026.

Sat 19/1220:45 -

1 stop12h 05m

Wed 23/1217:15 -

1 stop4h 50m

Deal found 26/9£284

Sat 5/1206:30 -

1 stop7h 10m

Sat 12/1216:00 -

2 stops18h 10m

Deal found 28/9£365

Sat 12/1206:30 -

1 stop7h 10m

Sat 19/1215:30 -

1 stop7h 30m

Deal found 30/9£506

Sat 26/1206:30 -

1 stop7h 10m

Sat 2/108:40 -

2 stops9h 40m

Deal found 26/9£534

Sat 19/1206:30 -

1 stop7h 10m

Sun 3/112:40 -

2 stops9h 25m

Deal found 26/9£827

Find flight deals from Heathrow to Grenoble

Round-trip from	£284
One-way from	£99
Popular in	August
Cheapest in	November
Average price	£119

19/12-23/12
2 total stops
16h 55m total
London to Grenoble

Search Deals

11/12-31/12
2 total stops
17h 30m total
London to Grenoble

Search Deals

Highest demand for flights based on searches. 14% potential increase in price (£16 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease (£3 potential savings vs. average return price).

Search Deals

Average for round-trip flights in September 2026

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Cheapflights Fare Finder

Use the filters below to find and compare flights from London Heathrow Airport to Grenoble that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonGrenoble

LHR London Heathrow - GNB Grenoble

LHRGNB

London Heathrow

Fri 11/12

20:50-15:20

2 stops17h 30m

Grenoble

Wed 31/12

00:00-00:00

Nonstop0h 00m

£99

LondonGrenoble

LHR London Heathrow - GNB Grenoble

LHRGNB

London Heathrow

Sat 20/2

06:30-14:40

1 stop7h 10m

Grenoble

Wed 31/12

00:00-00:00

Nonstop0h 00m

£105

LondonGrenoble

LHR London Heathrow - GNB Grenoble

LHRGNB

London Heathrow

Sat 12/12

08:50-09:50

1 stop24h 00m

Grenoble

Wed 31/12

00:00-00:00

Nonstop0h 00m

£125

LondonGrenoble

LHR London Heathrow - GNB Grenoble

LHRGNB

London Heathrow

Sat 6/2

06:30-14:40

1 stop7h 10m

Grenoble

Wed 31/12

00:00-00:00

Nonstop0h 00m

£138

LondonGrenoble

LHR London Heathrow - GNB Grenoble

LHRGNB

London Heathrow

Sat 26/12

06:30-14:40

1 stop7h 10m

Grenoble

Wed 31/12

00:00-00:00

Nonstop0h 00m

£166

LondonGrenoble

LHR London Heathrow - GNB Grenoble

LHRGNB

London Heathrow

Sat 19/12

20:45-09:50

1 stop12h 05m

Grenoble

Wed 31/12

00:00-00:00

Nonstop0h 00m

£187

Fastest return journey

LondonGrenoble

LHR London Heathrow - GNB Grenoble

LHRGNB

London Heathrow

Wed 30/12

08:50-16:35

1 stop6h 45m

Grenoble

Wed 31/12

00:00-00:00

Nonstop0h 00m

£205

LondonGrenoble

LHR London Heathrow - GNB Grenoble

LHRGNB

London Heathrow

Wed 23/12

07:50-16:35

1 stop7h 45m

Grenoble

Wed 31/12

00:00-00:00

Nonstop0h 00m

£240

LondonGrenoble

LHR London Heathrow - GNB Grenoble

LHRGNB

London Heathrow

Sat 9/1

06:30-14:40

1 stop7h 10m

Grenoble

Sat 16/1

13:55-21:25

2 stops8h 30m

£329

LondonGrenoble

LHR London Heathrow - GNB Grenoble

LHRGNB

London Heathrow

Sat 5/12

06:30-14:40

1 stop7h 10m

Grenoble

Sat 12/12

16:00-09:10

2 stops18h 10m

£365

Flights are sorted by cheapest return flights first.

Deals found on 29/9

Showing 1-10 of 13 resultsSorted by cheapest first

Best time to book a flight from Heathrow to Grenoble

Have a flexible travel schedule? Discover the best time to fly to Grenoble from Heathrow with our price prediction graph.

LHR-GNB

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.

Related info for your journey

What airport do you fly into for flights to Grenoble from London Heathrow?
Grenoble (GNB) is the airport you will fly into if you book a flight from London Heathrow to Grenoble. You should not have trouble finding flights to Grenoble from London Heathrow; the airport handles an average of 0 inbound flights from London Heathrow per day. You should also have plenty of airline options to choose from since 0 airlines have flights to the Grenoble airport from London Heathrow. It is only a 22.6 mi journey from Grenoble (GNB) to Grenoble’s city center.
Can I find deals for flights from Heathrow to Grenoble that include hotel bookings?
Yes. In addition to deals on Heathrow to Grenoble flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Heathrow to Grenoble?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Grenoble.
Can I find deals for business class flights from Heathrow to Grenoble?
Yes. Cheapflights offers flight deals from Heathrow to Grenoble 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

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Complete your trip

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

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Heathrow to Grenoble.

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

Cheapflights does show flights with no change fees to all users. To see these options for flights from Heathrow to Grenoble, users can toggle the no change fees filter when performing a flight search.

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Cheap flights from London Heathrow Airport to Grenoble from £99

This is the cheapest retur 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.

Cheap flight deals from Heathrow to Grenoble

Cheapest flights from Heathrow to GrenobleExplore the most affordable flight options available from Heathrow to Grenoble. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 30 September 2026.

Explore the most affordable flight options available from Heathrow to Grenoble. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 30 September 2026.

Best flights from Heathrow to GrenobleDiscover carefully curated flight deals from Heathrow to Grenoble that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 30 September 2026.

Discover carefully curated flight deals from Heathrow to Grenoble that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 30 September 2026.

One-way flights from Heathrow to GrenobleSearch for one-way flight options from Heathrow to Grenoble. Find affordable one-way fares based on user searches. Data last updated 30 September 2026.

Search for one-way flight options from Heathrow to Grenoble. Find affordable one-way fares based on user searches. Data last updated 30 September 2026.

Find flight deals from Heathrow to Grenoble

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Use the filters below to find and compare flights from London Heathrow Airport to Grenoble that are best for you.

Best time to book a flight from Heathrow to Grenoble

Have a flexible travel schedule? Discover the best time to fly to Grenoble from Heathrow with our price prediction graph.

Related info for your journey

What airport do you fly into for flights to Grenoble from London Heathrow?

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

How can I find direct flights from Heathrow to Grenoble?

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

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 Grenoble

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

Complete your trip to Grenoble by adding a car hire and/or hotel booking to your travel itinerary.

Direct flights to Auvergne-Rhône-Alpes

Book a non-stop flight to one of these other cities located in Auvergne-Rhône-Alpes.

Search flights from Heathrow to Grenoble by cabin class

Find flights from Heathrow to Grenoble, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Heathrow and Grenoble flights

Browse other Heathrow and Grenoble flight options. Last updated on 30 September 2026.

Other flights from Heathrow

Browse through other flights departing from Heathrow. Flights are based on user searches made on Cheapflights and were last updated on 30 September 2026.

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Check out other popular destinations found by fellow travellers in 2026

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How does Cheapflights help users find flights from Heathrow to Grenoble?

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

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Cheapest flights from Heathrow to Grenoble
Explore the most affordable flight options available from Heathrow to Grenoble. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 30 September 2026.

Best flights from Heathrow to Grenoble
Discover carefully curated flight deals from Heathrow to Grenoble that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 30 September 2026.

One-way flights from Heathrow to Grenoble
Search for one-way flight options from Heathrow to Grenoble. Find affordable one-way fares based on user searches. Data last updated 30 September 2026.