$363 Cheap Flights from Grenoble (GNB) to Lisbon (LIS)

View $363 flight on Sat, Mar 7, 2026Opens in a new window

Popular airlines from Grenoble (GNB-Grenoble - Isere) to Humberto Delgado Airport (LIS)

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Cheap Flights from Grenoble to Lisbon (GNB-LIS)

Prices were available within the past 7 days and start at $363 for one-way flights and $742 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

British Airways
Thu, Dec 18 - Sun, Dec 21
GNB
Grenoble
LIS
Lisbon
$742 Roundtrip, found 6 days ago
$742
Roundtrip
found 6 days ago
Select British Airways flight, departing Thu, Dec 18 from Grenoble to Lisbon, returning Sun, Dec 21, priced at $742 found 6 days ago
British Airways
Sat, Dec 20 - Sun, Dec 28
GNB
Grenoble
LIS
Lisbon
$1,241 Roundtrip, just found
$1,241
Roundtrip
just found
Select British Airways flight, departing Sat, Dec 20 from Grenoble to Lisbon, returning Sun, Dec 28, priced at $1,241 just found
British Airways
Sat, Dec 20 - Sun, Dec 28
GNB
Grenoble
LIS
Lisbon
$1,508 Roundtrip, just found
$1,508
Roundtrip
just found
Select British Airways flight, departing Sat, Dec 20 from Grenoble to Lisbon, returning Sun, Dec 28, priced at $1,508 just found

Frequently asked questions

How much does a flight from Grenoble - Isere Airport (GNB) to Humberto Delgado Airport (LIS) cost?
Snag a cheap one-way flight from $363 or cheap return flight from $742 from Grenoble - Isere Airport (GNB) to Humberto Delgado Airport (LIS) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Grenoble - Isere Airport (GNB) to Humberto Delgado Airport (LIS)?
December is the least expensive month to fly from GNB to LIS. Planning your trip for the off-season is often the key to landing a great deal.
Which airlines fly direct from Grenoble - Isere Airport (GNB) to Humberto Delgado Airport (LIS)?
You can't fly directly from Grenoble (GNB-Grenoble - Isere) to Humberto Delgado Airport (LIS). However, there are other airports that offer nonstop flights. Board your plane at Saint-Exupery Airport (LYS) and head straight to Lisbon District without layovers.
What is the cheapest airline that flies from Grenoble - Isere Airport (GNB) to Humberto Delgado Airport (LIS)?
To find the cheapest airline flying from GNB to LIS, use Expedia's filter tool. Tailor your search based on what matters most to you, such as preferred carriers and flight duration. You can then sort your results by "Price (lowest to highest)" to discover the cheapest flight right away.
How many flights per day from Grenoble - Isere Airport (GNB) to Humberto Delgado Airport (LIS)?
Nonstop flights from Grenoble - Isere Airport (GNB) to Humberto Delgado Airport (LIS) aren't available daily, so you'll need to take a flight with a layover. Explore your options with Expedia's filters. Enter your travel details and choose either "1 Stop" or "2+ Stops."
What day of the week has the most flights from GNB to LIS?
Friday is typically the busiest day for flights, while Tuesday is often the quietest.* Keep in mind that flight schedules can change depending on a range of factors, such as the time of year and carrier.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Grenoble - Isere Airport (GNB) to Humberto Delgado Airport (LIS)?
To avoid potential delays on the Grenoble - Isere Airport (GNB) to Humberto Delgado Airport (LIS) route, fly before 3 PM. Later departures have a 22% higher chance of cancellation.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Grenoble - Isere Airport (GNB) to Humberto Delgado Airport (LIS) last-minute?
Last-minute fares from GNB to LIS are generally more expensive. For the cheapest rates, start looking for flights as soon as possible. That said, if your travel plans are flexible, it's possible to find a cheap fare right before your trip.
Is it cheaper to book a GNB to LIS flight and hotel package?
Booking a GNB to LIS flight and hotel package tends to be cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your travels in one place. Select from our wide range of hotels and then add flights, car rentals and activities to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Grenoble - Isere Airport (GNB) to Humberto Delgado Airport (LIS)?
In most cases, you can reschedule or cancel your GNB to LIS flight. However, additional fees may apply, especially if your booking was made more than 24 hours ago. Double-check your itinerary for the airline's fees and guidelines on flight changes, or if you want more information, go to our Customer Service portal.

Travel information

Origin airport
Grenoble - Isere
Destination airport
Humberto Delgado
Roundtrip price
$742
Distance
868 mi

Book with confidence

Grenoble to Lisbon Flights

The cheapest times to fly from Grenoble to Lisbon

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Grenoble to Lisbon are during the month of December. You can find some of the cheapest flights from Grenoble to Lisbon with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Grenoble to Lisbon

Sunday is one of the best days to book for cheap flights from Grenoble to Lisbon: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Grenoble to Lisbon

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Grenoble to Lisbon in 2025. You can also book with separate airlines for your outbound and return journeys, from $363 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Grenoble to Lisbon flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Grenoble to Lisbon airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Grenoble to Lisbon Flights

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*Available to One Key members.