$144 Cheap Flights from Reykjavik (KEF) to Lisbon (LIS)

View $144 flight on Fri, Oct 31, 2025Opens in a new window

Popular airlines from Reykjavik–Keflavik Intl. Airport (KEF) to Humberto Delgado Airport (LIS)

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Find available prices by choosing your travel dates.

Cheap Flights from Reykjavik to Lisbon (KEF-LIS)

Prices were available within the past 7 days and start at $144 for one-way flights and $231 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Lufthansa
Thu, Jan 29 - Thu, Feb 5
KEF
Reykjavik
LIS
Lisbon
$231 Roundtrip, found 4 days ago
$231
Roundtrip
found 4 days ago
Select Lufthansa flight, departing Thu, Jan 29 from Reykjavik to Lisbon, returning Thu, Feb 5, priced at $231 found 4 days ago
Fly Play
Fri, Jan 9 - Fri, Jan 16
KEF
Reykjavik
LIS
Lisbon
$240 Roundtrip, found 4 days ago
$240
Roundtrip
found 4 days ago
Select Fly Play flight, departing Fri, Jan 9 from Reykjavik to Lisbon, returning Fri, Jan 16, priced at $240 found 4 days ago
Fly Play
Fri, Aug 29 - Fri, Sep 5
KEF
Reykjavik
LIS
Lisbon
$244 Roundtrip, found 5 days ago
$244
Roundtrip
found 5 days ago
Select Fly Play flight, departing Fri, Aug 29 from Reykjavik to Lisbon, returning Fri, Sep 5, priced at $244 found 5 days ago
Fly Play
Fri, Jul 18 - Fri, Jul 25
KEF
Reykjavik
LIS
Lisbon
$245 Roundtrip, found 2 days ago
$245
Roundtrip
found 2 days ago
Select Fly Play flight, departing Fri, Jul 18 from Reykjavik to Lisbon, returning Fri, Jul 25, priced at $245 found 2 days ago
Fly Play
Mon, Apr 28 - Mon, May 5
KEF
Reykjavik
LIS
Lisbon
$251 Roundtrip, found 12 hours ago
$251
Roundtrip
found 12 hours ago
Select Fly Play flight, departing Mon, Apr 28 from Reykjavik to Lisbon, returning Mon, May 5, priced at $251 found 12 hours ago
Fly Play
Mon, May 5 - Fri, May 23
KEF
Reykjavik
LIS
Lisbon
$261 Roundtrip, found 3 days ago
$261
Roundtrip
found 3 days ago
Select Fly Play flight, departing Mon, May 5 from Reykjavik to Lisbon, returning Fri, May 23, priced at $261 found 3 days ago
Fly Play
Fri, Nov 21 - Fri, Nov 28
KEF
Reykjavik
LIS
Lisbon
$263 Roundtrip, found 4 days ago
$263
Roundtrip
found 4 days ago
Select Fly Play flight, departing Fri, Nov 21 from Reykjavik to Lisbon, returning Fri, Nov 28, priced at $263 found 4 days ago
Icelandair
Thu, Nov 27 - Thu, Dec 4
KEF
Reykjavik
LIS
Lisbon
$296 Roundtrip, found 4 days ago
$296
Roundtrip
found 4 days ago
Select Icelandair flight, departing Thu, Nov 27 from Reykjavik to Lisbon, returning Thu, Dec 4, priced at $296 found 4 days ago
Swiss International Air Lines
Sat, May 10 - Sat, May 17
KEF
Reykjavik
LIS
Lisbon
$318 Roundtrip, found 4 days ago
$318
Roundtrip
found 4 days ago
Select Swiss International Air Lines flight, departing Sat, May 10 from Reykjavik to Lisbon, returning Sat, May 17, priced at $318 found 4 days ago
Iberia
Thu, May 8 - Wed, May 14
KEF
Reykjavik
LIS
Lisbon
$319 Roundtrip, found 2 days ago
$319
Roundtrip
found 2 days ago
Select Iberia flight, departing Thu, May 8 from Reykjavik to Lisbon, returning Wed, May 14, priced at $319 found 2 days ago
Flights from Reykjavik (KEF) to Lisbon (LIS)
Origin airport
Keflavik Intl.
Destination airport
Humberto Delgado
Airlines serving
Austrian Airlines, British Airways, Eurowings, Finnair, Fly Play, Iberia, Icelandair, KLM, Lufthansa, Scandinavian Airlines, Swiss International Air Lines, TAP Portugal, World Ticket Ltd
Roundtrip price
$232
Distance
1828 mi

Reykjavik to Lisbon Flights

The cheapest times to fly from Reykjavik 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 Reykjavik to Lisbon are during the month of January. You can find some of the cheapest flights from Reykjavik to Lisbon with Expedia's search tool and vast selection of airlines.

The best time to book a flight from Reykjavik to Lisbon

Sunday is one of the best days to book for cheap flights from Reykjavik 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 Reykjavik 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 Reykjavik to Lisbon in 2025. You can also book with separate airlines for your outbound and return journeys, from $144 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 Reykjavik 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 Reykjavik 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.

Frequently asked questions

How much does a flight from Keflavik Intl. Airport (KEF) to Humberto Delgado Airport (LIS) cost?
You can score cheap return fares from Keflavik Intl. Airport (KEF) to Humberto Delgado Airport (LIS) starting from $248. Book your seat and start your adventure. This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a Fly Play flight leaving KEF on April 28 2025 and touching down at LIS. The price was last updated on April 20 2025 and has not changed since.
What is the cheapest month to fly from KEF to LIS?
The cheapest flights from KEF to LIS are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from Keflavik Intl. Airport (KEF) to Humberto Delgado Airport (LIS)?
You can fly nonstop from Keflavik Intl. Airport (KEF) to Humberto Delgado Airport (LIS) on an Icelandair flight.
What is the cheapest airline that flies from KEF to LIS?
With prices starting from $144 for a one-way journey from KEF to LIS, Fly Play is currently the cheapest carrier flying this route. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from KEF on April 28 2025. Prices were last updated on April 20 2025 and have not changed since.
How many flights per day from Keflavik Intl. Airport (KEF) to Humberto Delgado Airport (LIS)?
On average, Keflavik Intl. Airport (KEF) has 4 direct flights to Humberto Delgado Airport (LIS) every week. If you’re looking for more options, use Expedia’s filters to look for flights with one or two stops. Squeeze in a visit to another city or just break up your journey.
What are the most popular departure times for flights from Keflavik Intl. Airport (KEF) to Humberto Delgado Airport (LIS)?
Flights between KEF and LIS are their busiest at 3 PM. If you’d like a quieter trip and potentially cheaper tickets, choose a time outside the usual busy windows.
What day of the week has the most flights from KEF to LIS?
Travel on a Friday if you’re looking for the best choice of flights from Keflavik Intl. Airport (KEF) to Humberto Delgado Airport (LIS).
What is the earliest flight from Keflavik Intl. Airport (KEF) to Humberto Delgado Airport (LIS)?
The earliest flight leaving from Keflavik Intl. Airport (KEF) is at around 3:50PM UTC+0. Board this plane and you’ll arrive at Humberto Delgado Airport (LIS) at approximately 8:15PM UTC+0. The total flight duration is 4h 25m.
How long does it take to fly from Keflavik Intl. Airport (KEF) to Humberto Delgado Airport (LIS)?
Flights from KEF to LIS have an average travel time of 4 hours and 22 minutes. The total distance between the two is 1,850 mi.
What is the best time to fly from Keflavik Intl. Airport (KEF) to Humberto Delgado Airport (LIS)?
Opt for a flight from Keflavik Intl. Airport (KEF) to Humberto Delgado Airport (LIS) that leaves before 3 PM to reduce the risk of cancellations and delays. Departures after this time have a 22% higher chance of being canceled, on average.**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.
What airports do you fly into for Lisbon District from Keflavik Intl. Airport (KEF)?
Humberto Delgado Airport (LIS) is the only airport in Lisbon District with direct flights from Keflavik Intl. Airport (KEF). Consider the available options and find cheap fares on Expedia.
Is it cheaper to buy a plane ticket from Keflavik Intl. Airport (KEF) to Humberto Delgado Airport (LIS) last-minute?
Last-minute fares from KEF to LIS are generally more expensive. To lock in the best rates, start searching for flights as soon as possible. That said, if your travel plans are flexible, it’s possible to find a cheap fare just before your departure.
Is it cheaper to book a KEF to LIS flight and hotel package?
Securing a KEF to LIS flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your trip in one place. Choose from our impressive range of stays and then add car rentals, activities and flights to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Keflavik Intl. Airport (KEF) to Humberto Delgado Airport (LIS)?
If you booked your KEF to LIS flight within the last 24 hours, you may be able to cancel or modify it without any fees. Depending on the airline and the fare type you purchased, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, visit our Customer Service portal for further details.

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*Available to One Key members.