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Keflavik Intl

$426+ Cheap flights from Louisville (SDF) to Keflavik Intl (KEF)

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 8/4. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — KEF
Aug 3 — Aug 101
Sun 8/3
Sun 8/10
1 adult, Economy
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Cheap flight deals from Louisville to Keflavik Intl

Discover tips and strategies to find the most affordable flight options for your journey from Louisville (SDF) to Keflavik Intl (KEF). 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 July 29, 2025.

Round-trip from

$567
(United Airlines)

One-way from

$426
(Mytrip)

Popular in

January

Cheapest in

August

Average price

$1,104
From Louisville Intl to Reykjavik Keflavik Intl
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One-way flight from Louisville Intl to Reykjavik Keflavik Intl
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Highest demand for flights based on searches. 22% potential increase in price ($346 potential increase over avg. RT price).
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Cheapest flight prices on average. 7% potential price decrease ($81 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find flight deals from Louisville to Keflavik Intl

Cheapest flights from Louisville to Keflavik Intl
Explore the most affordable flight options available from Louisville to Keflavik Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.

This United Airlines deal was found by Cheapflights users on 7/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/96:15 amSDF - KEF
2 stops21h 55mUnited Airlines
Fri 9/199:30 amKEF - SDF
2 stops37h 28mUnited Airlines
Deal found 7/27$567
This Air Canada deal was found by Cheapflights users on 7/29. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/910:55 amSDF - KEF
3 stops17h 15mAir Canada
Fri 9/199:30 amKEF - SDF
3 stops16h 54mAir Canada
Deal found 7/29$603
This Lufthansa deal was found by Cheapflights users on 7/27. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/87:36 pmSDF - KEF
2 stops24h 34mLufthansa
Thu 9/182:20 pmKEF - SDF
2 stops34h 42mLufthansa
Deal found 7/27$644
This Mytrip deal was found by Cheapflights users on 7/27. 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.
Thu 9/410:14 amSDF - KEF
3 stops38h 31mMultiple Airlines
Mon 9/83:05 pmKEF - SDF
2 stops22h 14mMultiple Airlines
Deal found 7/27$672
This Expedia deal was found by Cheapflights users on 7/27. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/227:31 pmSDF - KEF
2 stops58h 24mBritish Airways
Sat 11/2911:55 amKEF - SDF
2 stops59h 43mBritish Airways
Deal found 7/27$737

Cheapflights Fare Finder

 
Customize your flight search to find flights from Louisville to Keflavik Intl 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 July 29, 2025.
Use the filters below to find and compare flights from Louisville to Reykjavik Keflavik Intl Airport that are best for you.

Fly from

Louisville

Fly to

Keflavik Intl

Route

Depart

Return

Price

LouisvilleReykjavik

SDF - KEF

SDFKEF

Louisville Intl

Tue 9/9

6:15 am-8:10 am

2 stops21h 55m

Reykjavik Keflavik Intl

Fri 9/19

9:30 am-6:58 pm

2 stops37h 28m

$567

LouisvilleReykjavik

SDF - KEF

SDFKEF

Louisville Intl

Tue 9/9

10:55 am-8:10 am

3 stops17h 15m

Reykjavik Keflavik Intl

Fri 9/19

9:30 am-10:24 pm

3 stops16h 54m

$603

LouisvilleReykjavik

SDF - KEF

SDFKEF

Louisville Intl

Mon 9/8

7:36 pm-12:10 am

2 stops24h 34m

Reykjavik Keflavik Intl

Thu 9/18

2:20 pm-9:02 pm

2 stops34h 42m

$644

LouisvilleReykjavik

SDF - KEF

SDFKEF

Louisville Intl

Thu 9/4

10:14 am-4:45 am

3 stops38h 31m

Reykjavik Keflavik Intl

Mon 9/8

3:05 pm-9:19 am

2 stops22h 14m

$672

LouisvilleReykjavik

SDF - KEF

SDFKEF

Louisville Intl

Sat 11/22

7:31 pm-10:55 am

2 stops58h 24m

Reykjavik Keflavik Intl

Sat 11/29

11:55 am-6:38 pm

2 stops59h 43m

$737

LouisvilleReykjavik

SDF - KEF

SDFKEF

Louisville Intl

Mon 8/4

2:50 pm-4:50 am

3 stops34h 00m

$426

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

Best time to book a flight from Louisville to Keflavik Intl

Have a flexible travel schedule? Discover the best time to fly to Keflavik Intl from Louisville 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 Louisville to Reykjavik Keflavik Intl Airport

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

Currently, November is the cheapest month in which you can book a flight from Louisville to Reykjavik Keflavik Intl Airport (average of $328). Flying from Louisville to Reykjavik Keflavik Intl Airport in June is currently the most expensive (average of $653). 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.

Reviews of airlines servicing Keflavik Intl

Get insights into the airlines that provide service to Keflavik Intl. 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 Keflavik Intl. Reviews last updated July 29, 2025.
Read reviews from past customers who have flown United Airlines, Air Canada, and Lufthansa from Louisville to Reykjavik Keflavik Intl Airport. 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.
United Airlines
7.4
Good
8,896 reviews

Food

6.6

Comfort

7.3

Overall

7.4

Crew

8.1

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
8,896 reviews
United Airlines
7.4
Good
8,896 reviews

Food

6.6

Comfort

7.3

Overall

7.4

Crew

8.1

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Air Canada
7.1
Good
9,826 reviews
United Airlines
7.4
Good
8,896 reviews

Food

6.6

Comfort

7.3

Overall

7.4

Crew

8.1

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Lufthansa
6.8
Okay
7,265 reviews
United Airlines
7.4
Good
8,896 reviews

Food

6.6

Comfort

7.3

Overall

7.4

Crew

8.1

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
British Airways
6.6
Okay
7,208 reviews
United Airlines
7.4
Good
8,896 reviews

Food

6.6

Comfort

7.3

Overall

7.4

Crew

8.1

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

Related info for your journey

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

    If you book a flight to Reykjavik Keflavik Intl from Louisville, you will be flying from Louisville Intl, which is the city’s only airport. Louisville Intl (SDF) is located 5.3 mi from the center of Louisville. There are 0 flights from Louisville Intl to Reykjavik Keflavik Intl per day from 1 airline.

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

    According to our current data, United Airlines ($567), Air Canada ($603), and Lufthansa ($644) offers the cheapest pricing from Louisville to Reykjavik Keflavik Intl Airport.

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

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

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

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

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

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

    Currently, November is the cheapest month in which you can book a flight from Louisville to Reykjavik Keflavik Intl Airport (average of $328). Flying from Louisville to Reykjavik Keflavik Intl Airport in June is currently the most expensive (average of $653). 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 Reykjavik Keflavik Intl Airport?

Book flights to Reykjavik Keflavik Intl Airport if you plan to visit one of these locations
Keflavik
Hveragerdi

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Top airline flying from Louisville to Keflavik Intl

Discover the top airline that operate flights from Louisville to Keflavik Intl. 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 July 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$586Average$992FlexibilityNo cancel feeOn-timeN/A

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