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$127+ 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 12/15. Fares are subject to change and may not be available on all flights or dates of travel.
KEF — LIS
ago. 31 — sep. 71
dom. 8/31
dom. 9/7
1 adult, Economy
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Cheap 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 agosto 26, 2025.

Round-trip from

$193
(Connections by easyJet)

One-way from

$127
(Transavia Smart Connect)

Popular in

August

Cheapest in

February

Average price

$651
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. 26% potential increase in price ($144 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($24 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find 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 agosto 26, 2025.

This Connections by easyJet deal was found by Cheapflights users on 8/24. 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.
dom. 11/307:30 pmKEF - LIS
1 stop17h 15measyJet
lun. 12/18:00 pmLIS - KEF
1 stop14h 15measyJet
Deal found 8/24$193
This Connections by easyJet deal was found by Cheapflights users on 8/24. 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.
jue. 11/2710:30 amKEF - LIS
1 stop8h 30measyJet
dom. 11/308:05 pmLIS - KEF
1 stop15h 10measyJet
Deal found 8/24$198
This Connections by easyJet deal was found by Cheapflights users on 8/25. 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.
vie. 12/127:15 pmKEF - LIS
1 stop17h 25measyJet
lun. 12/2210:55 amLIS - KEF
1 stop7h 50measyJet
Deal found 8/25$208
This Mytrip deal was found by Cheapflights users on 8/24. 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.
mié. 10/86:40 amKEF - LIS
1 stop13h 00mMultiple Airlines
mié. 10/155:55 amLIS - KEF
1 stop8h 50mMultiple Airlines
Deal found 8/24$260
This Booking.com deal was found by Cheapflights users on 8/25. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 12/123:50 pmKEF - LIS
Nonstop4h 25mPLAY
lun. 12/229:15 pmLIS - KEF
Nonstop4h 35mPLAY
Deal found 8/25$262
This Mytrip deal was found by Cheapflights users on 8/25. 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.
vie. 9/192:50 pmKEF - LIS
Nonstop4h 30mPLAY
vie. 9/269:20 pmLIS - KEF
Nonstop4h 30mPLAY
Deal found 8/25$283
This Mytrip deal was found by Cheapflights users on 8/24. 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.
vie. 9/262:50 pmKEF - LIS
Nonstop4h 30mPLAY
vie. 10/39:20 pmLIS - KEF
Nonstop4h 30mPLAY
Deal found 8/24$284
This Kiwi.com deal was found by Cheapflights users on 8/25. 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.
vie. 12/128:20 pmKEF - LIS
1 stop23h 55mMultiple Airlines
lun. 12/229:15 pmLIS - KEF
Nonstop4h 35mMultiple Airlines
Deal found 8/25$292

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 agosto 26, 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

dom. 11/30

7:30 pm-12:45 pm

1 stop17h 15m

Lisbon Humberto Delgado

lun. 12/1

8:00 pm-10:15 am

1 stop14h 15m

$193

ReykjavikLisbon

KEF - LIS

KEFLIS

Reykjavik Keflavik Intl

jue. 11/27

10:30 am-7:00 pm

1 stop8h 30m

Lisbon Humberto Delgado

dom. 11/30

8:05 pm-11:15 am

1 stop15h 10m

$198

ReykjavikLisbon

KEF - LIS

KEFLIS

Reykjavik Keflavik Intl

vie. 12/12

7:15 pm-12:40 pm

1 stop17h 25m

Lisbon Humberto Delgado

lun. 12/22

10:55 am-6:45 pm

1 stop7h 50m

$208

ReykjavikLisbon

KEF - LIS

KEFLIS

Reykjavik Keflavik Intl

mié. 10/8

6:40 am-8:40 pm

1 stop13h 00m

Lisbon Humberto Delgado

mié. 10/15

5:55 am-1:45 pm

1 stop8h 50m

$260

ReykjavikLisbon

KEF - LIS

KEFLIS

Reykjavik Keflavik Intl

vie. 12/12

3:50 pm-8:15 pm

Nonstop4h 25m

Lisbon Humberto Delgado

lun. 12/22

9:15 pm-1:50 am

Nonstop4h 35m

$262

ReykjavikLisbon

KEF - LIS

KEFLIS

Reykjavik Keflavik Intl

vie. 9/19

2:50 pm-8:20 pm

Nonstop4h 30m

Lisbon Humberto Delgado

vie. 9/26

9:20 pm-12:50 am

Nonstop4h 30m

$283

ReykjavikLisbon

KEF - LIS

KEFLIS

Reykjavik Keflavik Intl

vie. 9/26

2:50 pm-8:20 pm

Nonstop4h 30m

Lisbon Humberto Delgado

vie. 10/3

9:20 pm-12:50 am

Nonstop4h 30m

$284

ReykjavikLisbon

KEF - LIS

KEFLIS

Reykjavik Keflavik Intl

vie. 12/12

8:20 pm-8:15 pm

1 stop23h 55m

Lisbon Humberto Delgado

lun. 12/22

9:15 pm-1:50 am

Nonstop4h 35m

$292

ReykjavikLisbon

KEF - LIS

KEFLIS

Reykjavik Keflavik Intl

lun. 12/15

6:05 pm-9:05 am

1 stop15h 00m

$127

ReykjavikLisbon

KEF - LIS

KEFLIS

Reykjavik Keflavik Intl

lun. 10/27

3:50 pm-8:15 pm

Nonstop4h 25m

$150

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/25

Showing 1-10 of 15 results
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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 $612). Flying from Reykjavik Keflavik Intl Airport to Lisbon in June is currently the most expensive (average of $1,127). 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 agosto 26, 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 morning tend to be the most expensive. A flight in the afternoon could potentially save you up to 24% on airfare.

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 agosto 26, 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
7.1
Good
1,962 reviews

Entertainment

6.3

Boarding

7.0

Food

6.2

Crew

7.8

Comfort

7.1

Overall

7.1

Reviews

1 / 20
2.0
Mediocre

Claudia,Jul 2025

EWR - LIS

Never made the trip. Had to cancel due to multiple delays
TAP AIR PORTUGAL
7.1
Good
1,962 reviews
TAP AIR PORTUGAL
7.1
Good
1,962 reviews

Entertainment

6.3

Boarding

7.0

Food

6.2

Crew

7.8

Comfort

7.1

Overall

7.1

Reviews

1 / 20
2.0
Mediocre

Claudia,Jul 2025

EWR - LIS

Never made the trip. Had to cancel due to multiple delays
Icelandair
7.0
Good
533 reviews
TAP AIR PORTUGAL
7.1
Good
1,962 reviews

Entertainment

6.3

Boarding

7.0

Food

6.2

Crew

7.8

Comfort

7.1

Overall

7.1

Reviews

1 / 20
2.0
Mediocre

Claudia,Jul 2025

EWR - LIS

Never made the trip. Had to cancel due to multiple delays
PLAY
7.0
Good
103 reviews
TAP AIR PORTUGAL
7.1
Good
1,962 reviews

Entertainment

6.3

Boarding

7.0

Food

6.2

Crew

7.8

Comfort

7.1

Overall

7.1

Reviews

1 / 20
2.0
Mediocre

Claudia,Jul 2025

EWR - LIS

Never made the trip. Had to cancel due to multiple delays

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 $262, easyJet can have you in Lisbon from Reykjavik Keflavik Intl Airport in 4h 25m. 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 $223 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 43% 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, January is the cheapest month in which you can book a flight from Reykjavik Keflavik Intl Airport to Lisbon (average of $612). Flying from Reykjavik Keflavik Intl Airport to Lisbon in June is currently the most expensive (average of $1,127). 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
Sintra
Fátima
Oeiras
Beja
Nazaré
Ericeira
Costa da Caparica
Torres Vedras
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 agosto 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$223Average$394FlexibilityNo cancel feeOn-time76%
PLAYCheapest$264Average$375FlexibilityNo cancel feeOn-timeN/A
TAP AIR PORTUGALCheapest$350Average$725FlexibilityNo cancel feeOn-timeN/A

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