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$100+ Cheap flights from Keflavik Intl (KEF) to Lisbon (LIS)

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 3/19. Fares are subject to change and may not be available on all flights or dates of travel.
KEF — LIS
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
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Cheap flight deals from Keflavik Intl to Lisbon

Cheapest flights from Keflavik Intl to Lisbon
Explore the most affordable flight options available from Keflavik Intl to Lisbon. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 18, 2025.

This Kiwi.com deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/165:05 pmKEF - LIS
2 stops28h 25mMultiple Airlines
Tue 12/235:30 pmLIS - KEF
1 stop30h 45mMultiple Airlines
Deal found 12/15$480
This Gotogate deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/163:20 pmKEF - LIS
2 stops32h 10mLufthansa
Tue 12/236:10 amLIS - KEF
2 stops30h 55mLufthansa
Deal found 12/15$911
This Icelandair deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/237:25 amKEF - LIS
1 stop8h 15mIcelandair
Sun 12/289:20 pmLIS - KEF
Nonstop4h 30mIcelandair
Deal found 12/16$1,758
This Icelandair deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/237:25 amKEF - LIS
1 stop8h 15mMultiple Airlines
Sun 12/289:20 pmLIS - KEF
Nonstop4h 30mMultiple Airlines
Deal found 12/17$1,833

Find flight deals from Keflavik Intl to Lisbon

Discover tips and strategies to find the most affordable flight options for your journey from Keflavik Intl (KEF) to Lisbon (LIS). 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 December 18, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$191
(Connections by easyJet)

One-way from

$100
(Connections by easyJet)

Popular in

November

Cheapest in

February

Average price

$520
Provider with most accurate pricing for Reykjavik Keflavik Intl-Lisbon Humberto Delgado flight deals.
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Provider most trusted by Cheapflights users for Reykjavik Keflavik Intl-Lisbon Humberto Delgado flights.
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From Reykjavik Keflavik Intl to Lisbon Humberto Delgado
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One-way flight from Reykjavik Keflavik Intl to Lisbon Humberto Delgado
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Highest demand for flights based on searches. 24% potential increase in price ($165 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($30 potential savings vs. average RT price).
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Average for round-trip flights in December 2025
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Keflavik Intl to Lisbon 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 2,558,603 searches. Data last updated December 18, 2025.
Use the filters below to find and compare flights from Reykjavik Keflavik Intl Airport to Lisbon that are best for you.

Fly from

Keflavik Intl

Fly to

Lisbon

Route

Depart

Return

Price

ReykjavikLisbon

KEF - LIS

KEFLIS

Reykjavik Keflavik Intl

Thu 3/12

10:00 am-7:00 pm

1 stop9h 00m

Lisbon Humberto Delgado

Sun 3/22

10:20 am-6:40 pm

1 stop8h 20m

$191

ReykjavikLisbon

KEF - LIS

KEFLIS

Reykjavik Keflavik Intl

Sat 1/31

10:20 am-9:35 am

2 stops23h 15m

Lisbon Humberto Delgado

Sat 2/7

8:30 pm-8:55 am

1 stop12h 25m

$242

ReykjavikLisbon

KEF - LIS

KEFLIS

Reykjavik Keflavik Intl

Mon 5/4

8:25 am-6:45 pm

1 stop9h 20m

Lisbon Humberto Delgado

Wed 5/13

5:00 am-7:00 pm

1 stop15h 00m

$286

ReykjavikLisbon

KEF - LIS

KEFLIS

Reykjavik Keflavik Intl

Sat 3/28

12:40 am-8:00 am

1 stop7h 20m

Lisbon Humberto Delgado

Sun 4/5

8:05 pm-7:35 am

1 stop12h 30m

$343

ReykjavikLisbon

KEF - LIS

KEFLIS

Reykjavik Keflavik Intl

Sun 2/8

9:35 am-4:40 pm

1 stop7h 05m

Lisbon Humberto Delgado

Thu 2/12

5:05 pm-12:15 am

2 stops31h 10m

$375

ReykjavikLisbon

KEF - LIS

KEFLIS

Reykjavik Keflavik Intl

Sun 1/25

10:05 am-7:20 pm

1 stop9h 15m

Lisbon Humberto Delgado

Sun 2/1

8:05 pm-6:45 pm

1 stop22h 40m

$392

ReykjavikLisbon

KEF - LIS

KEFLIS

Reykjavik Keflavik Intl

Tue 1/13

11:50 am-9:55 pm

1 stop10h 05m

Lisbon Humberto Delgado

Sun 1/18

10:40 am-10:55 am

1 stop24h 15m

$432

ReykjavikLisbon

KEF - LIS

KEFLIS

Reykjavik Keflavik Intl

Thu 1/8

4:00 pm-8:20 pm

Nonstop4h 20m

Lisbon Humberto Delgado

Thu 1/22

9:20 pm-1:50 am

Nonstop4h 30m

$464

ReykjavikLisbon

KEF - LIS

KEFLIS

Reykjavik Keflavik Intl

Tue 1/13

11:30 am-4:05 pm

1 stop28h 35m

Lisbon Humberto Delgado

Fri 1/23

4:40 pm-10:30 am

2 stops41h 50m

$474

ReykjavikLisbon

KEF - LIS

KEFLIS

Reykjavik Keflavik Intl

Mon 1/12

11:50 am-2:55 pm

1 stop27h 05m

Lisbon Humberto Delgado

Tue 1/20

10:35 am-10:50 am

1 stop24h 15m

$487

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/17

Showing 1-10 of 21 results
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Compare providers for flights from Keflavik Intl to Lisbon

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Keflavik Intl to Lisbon in December.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
Trip.comPrice Accuracy2 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Reykjavik Keflavik Intl Airport-Lisbon flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Reykjavik Keflavik Intl Airport-Lisbon flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Reykjavik Keflavik Intl Airport-Lisbon flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Reykjavik Keflavik Intl Airport-Lisbon flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Reykjavik Keflavik Intl Airport-Lisbon flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Keflavik Intl to Lisbon

Have a flexible travel schedule? Discover the best time to fly to Lisbon from Keflavik Intl with our price prediction graph.
Estimated round-trip 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 Reykjavik Keflavik Intl Airport to Lisbon

What is the cheapest month to book a flight from Reykjavik Keflavik Intl Airport to Lisbon?

Currently, January is the cheapest month in which you can book a flight from Reykjavik Keflavik Intl Airport to Lisbon (average of $218). Flying from Reykjavik Keflavik Intl Airport to Lisbon in November is currently the most expensive (average of $836). 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 KEF to LIS?

Find hourly flight availability from Keflavik Intl to Lisbon. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 18, 2025.

One of the essential ways to save on airfare from Reykjavik Keflavik Intl Airport to Lisbon is to remain as flexible as possible. Flights that are in the evening tend to be the most expensive. A flight at noon could potentially save you up to 22% on airfare.

How much does it cost to fly round-trip from Reykjavik Keflavik Intl Airport to Lisbon?

Reviews of airlines servicing Lisbon

Get insights into the airlines that provide service to Lisbon. 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 Lisbon. Reviews last updated December 18, 2025.
Read reviews from past customers who have flown TAP AIR PORTUGAL, Icelandair, and PLAY from Reykjavik Keflavik Intl Airport to Lisbon. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
TAP AIR PORTUGAL
7.2
Good
2,092 reviews

Comfort

7.1

Boarding

7.0

Food

6.2

Overall

7.2

Entertainment

6.3

Crew

7.8

Reviews

1 / 20
8.0
Excellent

Michael,Dec 2025

FNC - LIS

Long wait standing after checking in at the gate Limited juice selection.
TAP AIR PORTUGAL
7.2
Good
2,092 reviews
TAP AIR PORTUGAL
7.2
Good
2,092 reviews

Comfort

7.1

Boarding

7.0

Food

6.2

Overall

7.2

Entertainment

6.3

Crew

7.8

Reviews

1 / 20
8.0
Excellent

Michael,Dec 2025

FNC - LIS

Long wait standing after checking in at the gate Limited juice selection.
Icelandair
7.0
Good
591 reviews
TAP AIR PORTUGAL
7.2
Good
2,092 reviews

Comfort

7.1

Boarding

7.0

Food

6.2

Overall

7.2

Entertainment

6.3

Crew

7.8

Reviews

1 / 20
8.0
Excellent

Michael,Dec 2025

FNC - LIS

Long wait standing after checking in at the gate Limited juice selection.
PLAY
7.0
Good
TAP AIR PORTUGAL
7.2
Good
2,092 reviews

Comfort

7.1

Boarding

7.0

Food

6.2

Overall

7.2

Entertainment

6.3

Crew

7.8

Reviews

1 / 20
8.0
Excellent

Michael,Dec 2025

FNC - LIS

Long wait standing after checking in at the gate Limited juice selection.

Related info for your journey

Find useful and relevant information for your journey from Keflavik Intl to Lisbon. 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 Lisbon from Reykjavik Keflavik Intl?

    Most people fly into Lisbon Humberto Delgado (LIS) if they book a flight to Lisbon from Reykjavik Keflavik Intl. On average, Humberto Delgado has 0 inbound flights from Reykjavik Keflavik Intl per day from 3 airlines. Lisbon Humberto Delgado is conveniently located just 4.2 mi from Lisbon’s city center.

  • How long is the flight from Reykjavik Keflavik Intl Airport to Lisbon?

    For as low as $191, easyJet can have you in Lisbon from Reykjavik Keflavik Intl Airport in 9h. There are 1826 mi between Reykjavik Keflavik Intl Airport and Lisbon. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from Reykjavik Keflavik Intl Airport to Lisbon round-trip?

    Our cheapest airline available from Reykjavik Keflavik Intl Airport to Lisbon is Icelandair. Our recent data shows that you can find tickets from as low as $234 on this airline. Additional options worth looking into are PLAY and TAP AIR PORTUGAL, starting at $264 and $350 round-trip. Icelandair is currently priced 54% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from Reykjavik Keflavik Intl Airport to Lisbon one-way?

    The cheapest airline one-way is PLAY, with whom users have recently found tickets for as low as $155. However, be on the lookout for offers from Icelandair and TAP AIR PORTUGAL, as they are both options that can get you from Reykjavik Keflavik Intl Airport to Lisbon for a low price.

  • Can I find deals for flights from Keflavik Intl to Lisbon that include hotel bookings?

    Yes. In addition to deals on Keflavik Intl to Lisbon flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Keflavik Intl to Lisbon?

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

  • Can I find deals for business class flights from Keflavik Intl to Lisbon?

    Yes. Cheapflights offers flight deals from Keflavik Intl to Lisbon 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 Reykjavik Keflavik Intl Airport to Lisbon?

    Currently, January is the cheapest month in which you can book a flight from Reykjavik Keflavik Intl Airport to Lisbon (average of $218). Flying from Reykjavik Keflavik Intl Airport to Lisbon in November is currently the most expensive (average of $836). 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

Traveling to a place near Lisbon?

Book flights to Lisbon if you plan to visit one of these locations
Fátima
Oeiras
Ericeira
Costa da Caparica
Torres Vedras
Beja
Nazaré
Sesimbra
Colares

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Top 3 airlines flying from Keflavik Intl to Lisbon

Discover the top 3 airlines that operate flights from Keflavik Intl to Lisbon. 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 2,558,603 searches. Data last updated December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$234Average$452FlexibilityNo cancel feeOn-time76%
PLAYCheapest$264Average$368FlexibilityNo cancel feeOn-timeN/A
TAP AIR PORTUGALCheapest$350Average$725FlexibilityNo cancel feeOn-timeN/A

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