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Keflavik Intl

$718+ Cheap flights from Louisville (SDF) to Keflavik Intl (KEF)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/18. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — KEF
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
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 September 11, 2025.

Round-trip from

$718
(Mytrip)

Popular in

January

Cheapest in

October

Average price

$1,067
From Louisville Intl to Reykjavik Keflavik Intl
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Highest demand for flights based on searches. 26% potential increase in price ($414 potential increase over avg. RT price).
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Cheapest flight prices on average. 7% potential price decrease ($82 potential savings vs. average RT price).
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Average for round-trip flights in September 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 September 11, 2025.

This Mytrip deal was found by Cheapflights users on 9/9. 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.
Sat 10/187:15 amSDF - KEF
2 stops18h 50mMultiple Airlines
Wed 10/228:10 pmKEF - SDF
2 stops25h 53mMultiple Airlines
Deal found 9/9$718
This United Airlines deal was found by Cheapflights users on 9/9. 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.
Mon 12/111:00 amSDF - KEF
2 stops22h 20mMultiple Airlines
Sun 12/143:20 pmKEF - SDF
2 stops33h 02mMultiple Airlines
Deal found 9/9$744
This United Airlines deal was found by Cheapflights users on 9/9. 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.
Mon 12/111:00 amSDF - KEF
2 stops22h 20mMultiple Airlines
Sat 12/132:20 pmKEF - SDF
2 stops34h 02mMultiple Airlines
Deal found 9/9$772
This KLM deal was found by Cheapflights users on 9/8. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/710:30 amSDF - KEF
1 stop15h 50mKLM
Tue 10/148:45 amKEF - SDF
1 stop12h 39mKLM
Deal found 9/8$776
This Cheapflightsfares deal was found by Cheapflights users on 9/8. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/77:20 pmSDF - KEF
2 stops24h 15mLufthansa
Mon 10/1312:25 amKEF - SDF
2 stops26h 05mLufthansa
Deal found 9/8$823
This Mytrip deal was found by Cheapflights users on 9/9. 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.
Sat 9/138:23 amSDF - KEF
2 stops16h 32mMultiple Airlines
Mon 9/153:05 pmKEF - SDF
2 stops22h 14mMultiple Airlines
Deal found 9/9$892
This United Airlines deal was found by Cheapflights users on 9/9. 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.
Wed 9/107:36 pmSDF - KEF
1 stop8h 54mUnited Airlines
Fri 9/199:30 amKEF - SDF
2 stops37h 28mUnited Airlines
Deal found 9/9$953
This United deal was found by Cheapflights users on 9/9. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/101:00 pmSDF - KEF
2 stops15h 30mMultiple Airlines
Fri 9/199:30 amKEF - SDF
2 stops35h 46mMultiple Airlines
Deal found 9/9$958

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 September 11, 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

Sat 10/18

7:15 am-6:05 am

2 stops18h 50m

Reykjavik Keflavik Intl

Wed 10/22

8:10 pm-6:03 pm

2 stops25h 53m

$718

LouisvilleReykjavik

SDF - KEF

SDFKEF

Louisville Intl

Mon 12/1

11:00 am-2:20 pm

2 stops22h 20m

Reykjavik Keflavik Intl

Sun 12/14

3:20 pm-7:22 pm

2 stops33h 02m

$744

LouisvilleReykjavik

SDF - KEF

SDFKEF

Louisville Intl

Mon 12/1

11:00 am-2:20 pm

2 stops22h 20m

Reykjavik Keflavik Intl

Sat 12/13

2:20 pm-7:22 pm

2 stops34h 02m

$772

LouisvilleReykjavik

SDF - KEF

SDFKEF

Louisville Intl

Tue 10/7

10:30 am-6:20 am

1 stop15h 50m

Reykjavik Keflavik Intl

Tue 10/14

8:45 am-5:24 pm

1 stop12h 39m

$776

LouisvilleReykjavik

SDF - KEF

SDFKEF

Louisville Intl

Tue 10/7

10:29 am-6:20 am

2 stops15h 51m

Reykjavik Keflavik Intl

Tue 10/14

11:25 am-9:48 pm

2 stops14h 23m

$781

LouisvilleReykjavik

SDF - KEF

SDFKEF

Louisville Intl

Tue 10/7

7:20 pm-11:35 pm

2 stops24h 15m

Reykjavik Keflavik Intl

Mon 10/13

12:25 am-10:30 pm

2 stops26h 05m

$823

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/9

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 $655). 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 September 11, 2025.
Read reviews from past customers who have flown Delta 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.
Delta
8.0
Very good
7,960 reviews

Entertainment

7.9

Food

7.3

Overall

8.0

Comfort

7.9

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,960 reviews
Delta
8.0
Very good
7,960 reviews

Entertainment

7.9

Food

7.3

Overall

8.0

Comfort

7.9

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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.

  • How long is the flight from Louisville to Reykjavik Keflavik Intl Airport?

    Departing from Louisville to Reykjavik Keflavik Intl Airport will take you 15h 50m. The distance from Louisville to Reykjavik Keflavik Intl Airport is about 3084 mi.

  • What is the cheapest airline to fly from Louisville to Reykjavik Keflavik Intl Airport round-trip?

    According to our current data, Delta ($591), 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 $655). 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

Browse thousands of different options on Cheapflights for your next trip

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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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$591Average$965FlexibilityNo cancel feeOn-timeN/A

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