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$150+ 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 7/1. Fares are subject to change and may not be available on all flights or dates of travel.
KEF — LIS
Jun 21 — Jun 281
Sun 6/21
Sun 6/28
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 May 22, 2026.

This Mytrip deal was found by Cheapflights users on 5/19. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/16:25 pm
KEF
-
LIS
2 stops25h 45m
Multiple Airlines
Sun 6/1410:30 pm
LIS
-
KEF
2 stops20h 10m
Multiple Airlines
Deal found 5/19$286
This Mytrip deal was found by Cheapflights users on 5/21. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/12:45 pm
KEF
-
LIS
2 stops28h 05m
Multiple Airlines
Wed 7/87:25 am
LIS
-
KEF
2 stops29h 00m
Multiple Airlines
Deal found 5/21$351
This Mytrip deal was found by Cheapflights users on 5/20. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/57:00 pm
KEF
-
LIS
2 stops26h 25m
Multiple Airlines
Sat 7/116:15 am
LIS
-
KEF
2 stops27h 00m
Multiple Airlines
Deal found 5/20$362
This Mytrip deal was found by Cheapflights users on 5/20. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/57:00 pm
KEF
-
LIS
2 stops26h 25m
Multiple Airlines
Sun 7/125:10 pm
LIS
-
KEF
1 stop16h 05m
Multiple Airlines
Deal found 5/20$366
This Kiwi.com deal was found by Cheapflights users on 5/20. 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 8/128:20 am
KEF
-
LIS
1 stop8h 55m
Multiple Airlines
Fri 8/2110:40 am
LIS
-
KEF
1 stop22h 10m
Multiple Airlines
Deal found 5/20$370

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 May 22, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$286
(Mytrip)

One-way from

$150
(Kiwi.com)

Popular in

April

Cheapest in

January

Average price

$832

Good one-way deal

$359 or less
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. 20% potential increase in price ($168 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($28 potential savings vs. average RT price).
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Average for round-trip flights in May 2026
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Price to beat on a one-way flight from Reykjavik Keflavik Intl to Lisbon Humberto Delgado.
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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 May 22, 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

Sun 6/7

7:00 pm-7:50 am

1 stop11h 50m

Lisbon Humberto Delgado

Tue 6/16

6:30 am-9:40 am

2 stops28h 10m

$455

ReykjavikLisbon

KEF - LIS

KEFLIS

Reykjavik Keflavik Intl

Fri 6/26

7:55 pm-12:20 pm

1 stop15h 25m

Lisbon Humberto Delgado

Sat 7/11

11:05 am-6:40 pm

1 stop8h 35m

$464

ReykjavikLisbon

KEF - LIS

KEFLIS

Reykjavik Keflavik Intl

Mon 7/13

8:30 pm-9:55 am

1 stop12h 25m

Lisbon Humberto Delgado

Mon 7/20

4:50 pm-10:55 am

1 stop19h 05m

$469
Quickest round-trip

ReykjavikLisbon

KEF - LIS

KEFLIS

Reykjavik Keflavik Intl

Sun 8/9

4:00 pm-9:20 pm

Nonstop4h 20m

Lisbon Humberto Delgado

Thu 8/27

10:20 pm-1:50 am

Nonstop4h 30m

$630

ReykjavikLisbon

KEF - LIS

KEFLIS

Reykjavik Keflavik Intl

Sat 6/13

12:20 am-1:40 pm

2 stops12h 20m

Lisbon Humberto Delgado

Fri 6/26

6:40 pm-8:30 am

1 stop14h 50m

$638

ReykjavikLisbon

KEF - LIS

KEFLIS

Reykjavik Keflavik Intl

Wed 6/10

8:40 am-10:50 pm

2 stops13h 10m

Lisbon Humberto Delgado

Wed 6/17

7:45 pm-10:25 am

2 stops15h 40m

$713

ReykjavikLisbon

KEF - LIS

KEFLIS

Reykjavik Keflavik Intl

Tue 8/4

7:50 am-10:05 pm

1 stop13h 15m

Lisbon Humberto Delgado

Sun 8/30

7:00 am-2:45 pm

1 stop8h 45m

$753

ReykjavikLisbon

KEF - LIS

KEFLIS

Reykjavik Keflavik Intl

Fri 8/7

1:10 am-8:40 pm

1 stop18h 30m

Lisbon Humberto Delgado

Mon 8/24

12:10 pm-11:50 pm

1 stop12h 40m

$817

ReykjavikLisbon

KEF - LIS

KEFLIS

Reykjavik Keflavik Intl

Thu 7/9

10:45 am-10:55 am

2 stops23h 10m

Lisbon Humberto Delgado

Thu 7/16

7:45 pm-4:50 pm

2 stops22h 05m

$820

ReykjavikLisbon

KEF - LIS

KEFLIS

Reykjavik Keflavik Intl

Tue 8/4

7:35 am-5:50 pm

1 stop9h 15m

Lisbon Humberto Delgado

Wed 8/26

4:15 pm-3:10 pm

1 stop23h 55m

$821

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/17

Showing 1-10 of 20 resultsSorted by cheapest first
1
2
  • 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, January is the cheapest month in which you can book a flight from Reykjavik Keflavik Intl Airport to Lisbon (average of $369). Flying from Reykjavik Keflavik Intl Airport to Lisbon in April is currently the most expensive (average of $942). 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 May 22, 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
657 reviews

Crew

8.0

Entertainment

6.9

Food

6.2

Comfort

6.9

Overall

7.0

Boarding

7.2

Reviews

1 / 20
10.0
Excellent

Ásmundur,Apr 2026

CDG - KEF

The flight was uneventfull and ahead of schedule. The crew was attentive and the service good.
Icelandair
7.0
Good
657 reviews
Icelandair
7.0
Good
657 reviews

Crew

8.0

Entertainment

6.9

Food

6.2

Comfort

6.9

Overall

7.0

Boarding

7.2

Reviews

1 / 20
10.0
Excellent

Ásmundur,Apr 2026

CDG - KEF

The flight was uneventfull and ahead of schedule. The crew was attentive and the service good.

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 $630, easyJet can have you in Lisbon from Reykjavik Keflavik Intl Airport in 4h 20m. 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 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 13% below the average price you’ll pay for this route.

  • What are the cheapest flights from Reykjavik Keflavik Intl Airport to Lisbon?

    While on average a flight from Reykjavik Keflavik Intl Airport to Lisbon is generally $386, our data shows the cheapest flight currently is $359. When looking at the most popular route, (Reykjavik Keflavik Intl - Lisbon Humberto Delgado), you can expect to pay $286 for that flight.

  • 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 $369). Flying from Reykjavik Keflavik Intl Airport to Lisbon in April is currently the most expensive (average of $942). 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 May 22, 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$555Average$790FlexibilityNo cancel feeOn-time76%

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