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$130+ 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 5/5. Fares are subject to change and may not be available on all flights or dates of travel.
KEF — LIS
May 10 — May 171
Sun 5/10
Sun 5/17
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 April 10, 2026.

This Connections by easyJet deal was found by Cheapflights users on 4/8. 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 Connections by easyJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/2511:50 am
KEF
-
LIS
1 stop10h 05m
easyJet
Sat 11/288:15 pm
LIS
-
KEF
1 stop14h 20m
easyJet
Deal found 4/8$261
This Kiwi.com deal was found by Cheapflights users on 4/8. 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.
Wed 11/2510:35 am
KEF
-
LIS
1 stop11h 20m
Multiple Airlines
Tue 12/17:10 pm
LIS
-
KEF
1 stop14h 45m
Multiple Airlines
Deal found 4/8$266
This Kiwi.com deal was found by Cheapflights users on 4/8. 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.
Mon 11/2310:35 am
KEF
-
LIS
1 stop11h 05m
Multiple Airlines
Tue 12/17:10 pm
LIS
-
KEF
1 stop14h 45m
Multiple Airlines
Deal found 4/8$274
This Kiwi.com deal was found by Cheapflights users on 4/8. 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.
Mon 11/2310:35 am
KEF
-
LIS
1 stop11h 05m
Multiple Airlines
Wed 11/259:45 am
LIS
-
KEF
1 stop7h 30m
Multiple Airlines
Deal found 4/8$275
This Kiwi.com deal was found by Cheapflights users on 4/8. 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 11/2411:05 am
KEF
-
LIS
1 stop11h 30m
Multiple Airlines
Tue 12/15:25 pm
LIS
-
KEF
1 stop16h 30m
Multiple Airlines
Deal found 4/8$276
This Kiwi.com deal was found by Cheapflights users on 4/8. 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.
Wed 11/2510:35 am
KEF
-
LIS
1 stop11h 20m
Multiple Airlines
Thu 11/267:50 pm
LIS
-
KEF
1 stop14h 05m
Multiple Airlines
Deal found 4/8$285
This Kiwi.com deal was found by Cheapflights users on 4/8. 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.
Wed 11/2510:35 am
KEF
-
LIS
1 stop11h 20m
Multiple Airlines
Mon 11/306:20 am
LIS
-
KEF
1 stop10h 20m
Multiple Airlines
Deal found 4/8$290
This Kiwi.com deal was found by Cheapflights users on 4/8. 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.
Mon 11/2310:35 am
KEF
-
LIS
1 stop11h 05m
Multiple Airlines
Thu 11/267:50 pm
LIS
-
KEF
1 stop14h 05m
Multiple Airlines
Deal found 4/8$293
This Kiwi.com deal was found by Cheapflights users on 4/8. 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.
Wed 11/2511:50 am
KEF
-
LIS
1 stop10h 05m
Multiple Airlines
Sun 11/298:15 pm
LIS
-
KEF
1 stop13h 40m
Multiple Airlines
Deal found 4/8$295
This Kiwi.com deal was found by Cheapflights users on 4/8. 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.
Mon 11/2310:35 am
KEF
-
LIS
1 stop11h 05m
Multiple Airlines
Mon 11/306:20 am
LIS
-
KEF
1 stop10h 20m
Multiple Airlines
Deal found 4/8$298
This Kiwi.com deal was found by Cheapflights users on 4/8. 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.
Thu 11/2612:30 pm
KEF
-
LIS
1 stop10h 55m
easyJet
Sat 11/288:15 pm
LIS
-
KEF
1 stop14h 20m
easyJet
Deal found 4/8$299
This Kiwi.com deal was found by Cheapflights users on 4/8. 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 11/2411:05 am
KEF
-
LIS
1 stop8h 20m
Multiple Airlines
Sun 11/298:15 pm
LIS
-
KEF
1 stop13h 40m
Multiple Airlines
Deal found 4/8$302

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 April 10, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$313
(Kiwi.com)

One-way from

$130
(Mytrip)

Popular in

April

Cheapest in

January

Average price

$939
Provider with most accurate pricing for Reykjavik Keflavik Intl-Lisbon Humberto Delgado flight deals.
Search Deals
Provider most trusted by Cheapflights users for Reykjavik Keflavik Intl-Lisbon Humberto Delgado flights.
Search Deals
From Reykjavik Keflavik Intl to Lisbon Humberto Delgado
Search Deals
One-way flight from Reykjavik Keflavik Intl to Lisbon Humberto Delgado
Search Deals
Highest demand for flights based on searches. 19% potential increase in price ($150 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($30 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
Search Deals

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 April 10, 2026.
Use the filters below to find and compare flights from Reykjavik Keflavik Intl Airport to Lisbon that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ReykjavikLisbon

KEF - LIS

KEFLIS

Reykjavik Keflavik Intl

Wed 6/17

8:00 pm-10:55 am

1 stop13h 55m

Lisbon Humberto Delgado

Wed 6/24

7:45 pm-8:35 am

1 stop13h 50m

$327
Quickest round-trip

ReykjavikLisbon

KEF - LIS

KEFLIS

Reykjavik Keflavik Intl

Sun 6/21

8:10 pm-10:55 am

1 stop13h 45m

Lisbon Humberto Delgado

Sun 6/28

7:45 pm-7:50 am

1 stop13h 05m

$352

ReykjavikLisbon

KEF - LIS

KEFLIS

Reykjavik Keflavik Intl

Thu 4/30

7:15 pm-2:35 pm

1 stop18h 20m

Lisbon Humberto Delgado

Thu 5/7

3:35 pm-7:45 am

1 stop17h 10m

$374

ReykjavikLisbon

KEF - LIS

KEFLIS

Reykjavik Keflavik Intl

Thu 5/14

9:00 am-11:00 am

2 stops25h 00m

Lisbon Humberto Delgado

Thu 5/21

6:35 am-8:25 am

2 stops26h 50m

$381

ReykjavikLisbon

KEF - LIS

KEFLIS

Reykjavik Keflavik Intl

Sun 6/14

8:10 pm-10:55 am

1 stop13h 45m

Lisbon Humberto Delgado

Sun 6/21

3:35 pm-7:35 am

1 stop17h 00m

$389

ReykjavikLisbon

KEF - LIS

KEFLIS

Reykjavik Keflavik Intl

Thu 5/14

7:15 pm-10:50 pm

1 stop26h 35m

Lisbon Humberto Delgado

Thu 5/21

11:55 am-7:45 am

1 stop20h 50m

$432

ReykjavikLisbon

KEF - LIS

KEFLIS

Reykjavik Keflavik Intl

Thu 4/30

9:15 am-10:45 pm

2 stops36h 30m

Lisbon Humberto Delgado

Thu 5/7

5:05 am-12:10 am

2 stops20h 05m

$461

ReykjavikLisbon

KEF - LIS

KEFLIS

Reykjavik Keflavik Intl

Thu 5/7

9:15 am-10:45 pm

2 stops36h 30m

Lisbon Humberto Delgado

Thu 5/14

5:05 am-12:10 am

2 stops20h 05m

$474

ReykjavikLisbon

KEF - LIS

KEFLIS

Reykjavik Keflavik Intl

Thu 4/23

5:05 pm-8:25 pm

1 stop26h 20m

Lisbon Humberto Delgado

Fri 5/8

9:15 pm-9:40 am

1 stop13h 25m

$494

ReykjavikLisbon

KEF - LIS

KEFLIS

Reykjavik Keflavik Intl

Sun 5/10

8:10 pm-2:35 pm

1 stop17h 25m

Lisbon Humberto Delgado

Sun 5/17

5:00 am-7:10 pm

1 stop15h 10m

$527

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/9

Showing 1-10 of 21 resultsSorted by cheapest first
1
2
3
  • Most accurate provider: When it comes to deals on Reykjavik Keflavik Intl Airport-Lisbon flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Reykjavik Keflavik Intl Airport-Lisbon flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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, September is the cheapest month in which you can book a flight from Reykjavik Keflavik Intl Airport to Lisbon (average of $237). Flying from Reykjavik Keflavik Intl Airport to Lisbon in October is currently the most expensive (average of $550). 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.

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 April 10, 2026.
Read reviews from past customers who have flown Icelandair 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.
Icelandair
7.0
Good
631 reviews

Food

6.2

Entertainment

6.9

Comfort

6.9

Crew

8.0

Boarding

7.2

Overall

7.0

Reviews

1 / 20
6.0
Good

Anonymous,Mar 2026

ZRH - KEF

Almost 7 hr flight and no ear buds provided and no food. I would choose a different airline next time for that reason.
Icelandair
7.0
Good
631 reviews
Icelandair
7.0
Good
631 reviews

Food

6.2

Entertainment

6.9

Comfort

6.9

Crew

8.0

Boarding

7.2

Overall

7.0

Reviews

1 / 20
6.0
Good

Anonymous,Mar 2026

ZRH - KEF

Almost 7 hr flight and no ear buds provided and no food. I would choose a different airline next time for that reason.

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 1 airline. 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 $327, KLM can have you in Lisbon from Reykjavik Keflavik Intl Airport in 13h 55m. There are 1826 mi between Reykjavik Keflavik Intl Airport and Lisbon.

  • What is the cheapest airline to fly 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 $555 on this airline. Icelandair is currently priced 9% below the average price you’ll pay for this route.

  • 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, September is the cheapest month in which you can book a flight from Reykjavik Keflavik Intl Airport to Lisbon (average of $237). Flying from Reykjavik Keflavik Intl Airport to Lisbon in October is currently the most expensive (average of $550). 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
Ericeira
Oeiras
Beja
Costa da Caparica
Torres Vedras
Nazaré
Colares
Sesimbra

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Top airline flying from Keflavik Intl to Lisbon

Discover the top airline 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 April 10, 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$555Average$757FlexibilityNo cancel feeOn-time76%

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