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$106+ 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 1/24. Fares are subject to change and may not be available on all flights or dates of travel.
KEF — LIS
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
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 September 17, 2025.

Round-trip from

$186
(Connections by easyJet)

One-way from

$106
(Transavia Smart Connect)

Popular in

September

Cheapest in

February

Average price

$665

Good one-way deal

$242 or less
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. 28% potential increase in price ($163 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($24 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a one-way flight from Reykjavik Keflavik Intl to Lisbon Humberto Delgado.
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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 September 17, 2025.

This Connections by easyJet deal was found by Cheapflights users on 9/17. 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 Connections by easyJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/107:35 pmKEF - LIS
1 stop23h 50measyJet
Mon 11/176:05 amLIS - KEF
1 stop13h 00measyJet
Deal found 9/17$186
This Kiwi.com deal was found by Cheapflights users on 9/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1011:55 amKEF - LIS
2 stops25h 10mMultiple Airlines
Mon 11/176:20 amLIS - KEF
1 stop13h 20mMultiple Airlines
Deal found 9/16$239
This Booking.com deal was found by Cheapflights users on 9/16. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/103:50 pmKEF - LIS
Nonstop4h 25mPLAY
Mon 11/179:15 pmLIS - KEF
Nonstop4h 35mPLAY
Deal found 9/16$244
This Mytrip deal was found by Cheapflights users on 9/17. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1711:55 amKEF - LIS
1 stop10h 45mMultiple Airlines
Fri 11/289:30 pmLIS - KEF
2 stops22h 50mMultiple Airlines
Deal found 9/17$253
This Mytrip deal was found by Cheapflights users on 9/17. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/173:50 pmKEF - LIS
Nonstop4h 25mPLAY
Fri 11/289:15 pmLIS - KEF
Nonstop4h 35mPLAY
Deal found 9/17$265
This Mytrip deal was found by Cheapflights users on 9/17. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1711:55 amKEF - LIS
1 stop7h 25mMultiple Airlines
Mon 11/179:30 pmLIS - KEF
2 stops20h 15mMultiple Airlines
Deal found 9/17$277
This Kiwi.com deal was found by Cheapflights users on 9/17. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/110:20 amKEF - LIS
2 stops27h 10mMultiple Airlines
Sat 11/86:00 amLIS - KEF
1 stop14h 20mMultiple Airlines
Deal found 9/17$278

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 September 17, 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

Mon 11/10

7:35 pm-7:25 pm

1 stop23h 50m

Lisbon Humberto Delgado

Mon 11/17

6:05 am-7:05 pm

1 stop13h 00m

$186

ReykjavikLisbon

KEF - LIS

KEFLIS

Reykjavik Keflavik Intl

Mon 11/10

11:55 am-1:05 pm

2 stops25h 10m

Lisbon Humberto Delgado

Mon 11/17

6:20 am-7:40 pm

1 stop13h 20m

$239

ReykjavikLisbon

KEF - LIS

KEFLIS

Reykjavik Keflavik Intl

Mon 11/10

3:50 pm-8:15 pm

Nonstop4h 25m

Lisbon Humberto Delgado

Mon 11/17

9:15 pm-1:50 am

Nonstop4h 35m

$244

ReykjavikLisbon

KEF - LIS

KEFLIS

Reykjavik Keflavik Intl

Thu 3/5

12:05 pm-6:20 pm

1 stop30h 15m

Lisbon Humberto Delgado

Fri 3/27

6:40 pm-5:15 pm

1 stop22h 35m

$269

ReykjavikLisbon

KEF - LIS

KEFLIS

Reykjavik Keflavik Intl

Sat 11/1

10:20 am-1:30 pm

2 stops27h 10m

Lisbon Humberto Delgado

Sat 11/8

6:00 am-8:20 pm

1 stop14h 20m

$278

ReykjavikLisbon

KEF - LIS

KEFLIS

Reykjavik Keflavik Intl

Wed 10/15

10:45 am-10:10 pm

1 stop10h 25m

Lisbon Humberto Delgado

Wed 10/22

9:10 am-9:55 am

1 stop25h 45m

$292

ReykjavikLisbon

KEF - LIS

KEFLIS

Reykjavik Keflavik Intl

Sat 1/24

6:05 pm-10:00 am

1 stop15h 55m

$106

ReykjavikLisbon

KEF - LIS

KEFLIS

Reykjavik Keflavik Intl

Mon 10/6

2:50 pm-8:20 pm

Nonstop4h 30m

$151

ReykjavikLisbon

KEF - LIS

KEFLIS

Reykjavik Keflavik Intl

Mon 10/27

3:50 pm-8:15 pm

Nonstop4h 25m

$151

ReykjavikLisbon

KEF - LIS

KEFLIS

Reykjavik Keflavik Intl

Wed 10/15

10:45 am-10:10 pm

1 stop10h 25m

$152

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/16

Showing 1-10 of 12 results
1
2

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 $1,126). 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 September 17, 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.

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 September 17, 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
1,977 reviews

Crew

7.8

Food

6.2

Boarding

7.0

Comfort

7.1

Entertainment

6.3

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
1,977 reviews
TAP AIR PORTUGAL
7.1
Good
1,977 reviews

Crew

7.8

Food

6.2

Boarding

7.0

Comfort

7.1

Entertainment

6.3

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
545 reviews
TAP AIR PORTUGAL
7.1
Good
1,977 reviews

Crew

7.8

Food

6.2

Boarding

7.0

Comfort

7.1

Entertainment

6.3

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
1,977 reviews

Crew

7.8

Food

6.2

Boarding

7.0

Comfort

7.1

Entertainment

6.3

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 $244, 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 46% 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 Transavia France, with whom users have recently found tickets for as low as $106. However, be on the lookout for offers from PLAY and easyJet, as they are both options that can get you from Reykjavik Keflavik Intl Airport to Lisbon for a low price.

  • 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 $384, our data shows the cheapest flight currently is $202. When looking at the most popular route, (Reykjavik Keflavik Intl - Lisbon Humberto Delgado), you can expect to pay $11,863 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 $612). Flying from Reykjavik Keflavik Intl Airport to Lisbon in June is currently the most expensive (average of $1,126). 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 September 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$223Average$394FlexibilityNo cancel feeOn-time76%
PLAYCheapest$264Average$368FlexibilityNo cancel feeOn-timeN/A
TAP AIR PORTUGALCheapest$350Average$725FlexibilityNo cancel feeOn-timeN/A

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