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Keflavik Intl

$507+ Cheap flights from St. Louis (STL) 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 1/19. Fares are subject to change and may not be available on all flights or dates of travel.
STL — KEF
ene. 22 — ene. 291
mié. 1/22
mié. 1/29
1 adult, Economy
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Cheap flight deals from St. Louis to Keflavik Intl

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) 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 enero 17, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$619
(Expedia)

One-way from

$507
(Kiwi.com)

Popular in

November

Cheapest in

April

Average price

$833
Provider with most accurate pricing for Lambert-St Louis-Reykjavik Keflavik Intl flight deals.
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Provider most trusted by Cheapflights users for Lambert-St Louis-Reykjavik Keflavik Intl flights.
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From Lambert-St Louis to Reykjavik Keflavik Intl
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One-way flight from Lambert-St Louis to Reykjavik Keflavik Intl
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High demand for flights, 2% potential price rise
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Best time to find cheap flights, 2% potential price drop
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Average for round-trip flights in January 2025
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Find flight deals from St. Louis to Keflavik Intl

Cheapest flights from St. Louis to Keflavik Intl
Explore the most affordable flight options available from St. Louis to Keflavik Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on enero 17, 2025.

This Gotogate deal was found by Cheapflights users on 1/15. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 8/114:05 pmSTL - KEF
2 stops35h 30mAir Canada
jue. 8/2110:00 amKEF - STL
2 stops39h 00mAir Canada
Deal found 1/15$588
This Orbitz deal was found by Cheapflights users on 1/16. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 1/296:00 pmSTL - KEF
2 stops34h 55mBritish Airways
mar. 2/411:45 amKEF - STL
2 stops40h 24mBritish Airways
Deal found 1/16$619
This KLM deal was found by Cheapflights users on 1/16. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 5/122:18 pmSTL - KEF
1 stop11h 02mKLM
mar. 5/208:50 amKEF - STL
1 stop16h 43mKLM
Deal found 1/16$640
This Mytrip deal was found by Cheapflights users on 1/15. 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.
jue. 2/64:28 pmSTL - KEF
2 stops30h 32mMultiple Airlines
mié. 2/123:20 pmKEF - STL
3 stops29h 22mMultiple Airlines
Deal found 1/15$656
This United deal was found by Cheapflights users on 1/15. 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.
mar. 9/165:18 pmSTL - KEF
1 stop10h 12mUnited Airlines
lun. 9/2910:00 amKEF - STL
1 stop14h 33mUnited Airlines
Deal found 1/15$716
This Travelocity deal was found by Cheapflights users on 1/15. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 1/295:30 pmSTL - KEF
2 stops38h 25mLufthansa
mar. 2/42:55 pmKEF - STL
1 stop29h 00mLufthansa
Deal found 1/15$760
This Finnair deal was found by Cheapflights users on 1/15. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 5/106:23 pmSTL - KEF
2 stops17h 07mFinnair
dom. 5/185:15 pmKEF - STL
2 stops35h 08mFinnair
Deal found 1/15$764
This Delta deal was found by Cheapflights users on 1/14. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 6/47:20 amSTL - KEF
2 stops21h 10mDelta
jue. 6/1911:25 amKEF - STL
2 stops28h 13mDelta
Deal found 1/14$815
This American Airlines deal was found by Cheapflights users on 1/15. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 1/299:25 amSTL - KEF
2 stops19h 20mAmerican Airlines
mar. 2/411:45 amKEF - STL
3 stops27h 09mAmerican Airlines
Deal found 1/15$848
This Air France deal was found by Cheapflights users on 1/15. 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 France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 7/82:18 pmSTL - KEF
1 stop11h 02mAir France
mar. 7/158:50 amKEF - STL
1 stop12h 57mAir France
Deal found 1/15$908

Find flights from St. Louis to Keflavik Intl within your budget

Customize your flight search to find flights from St. Louis 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 enero 17, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

mar. 7/8

1:30 pm-8:35 am

2 stops38h 05m

Reykjavik Keflavik Intl

mar. 7/15

10:00 am-8:00 pm

2 stops39h 00m

$603

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

mié. 1/29

6:00 pm-10:55 am

2 stops34h 55m

Reykjavik Keflavik Intl

mar. 2/4

11:45 am-10:09 pm

2 stops40h 24m

$619

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

lun. 5/12

2:18 pm-6:20 am

1 stop11h 02m

Reykjavik Keflavik Intl

mar. 5/20

8:50 am-8:33 pm

1 stop16h 43m

$640

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

jue. 2/6

4:28 pm-5:00 am

2 stops30h 32m

Reykjavik Keflavik Intl

mié. 2/12

3:20 pm-2:42 pm

3 stops29h 22m

$656

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

mié. 1/29

5:30 pm-1:55 pm

2 stops38h 25m

Reykjavik Keflavik Intl

mar. 2/4

2:55 pm-1:55 pm

1 stop29h 00m

$760

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

sáb. 5/10

6:23 pm-4:30 pm

2 stops17h 07m

Reykjavik Keflavik Intl

dom. 5/18

5:15 pm-11:23 pm

2 stops35h 08m

$764

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

mié. 6/4

6:45 am-9:30 am

2 stops21h 45m

Reykjavik Keflavik Intl

vie. 6/20

11:25 am-8:06 am

2 stops25h 41m

$815

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

mié. 1/29

9:25 am-10:45 am

2 stops19h 20m

Reykjavik Keflavik Intl

mar. 2/4

11:45 am-8:54 am

3 stops27h 09m

$848

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

mar. 7/8

3:15 pm-8:35 am

2 stops36h 20m

Reykjavik Keflavik Intl

mar. 7/15

10:00 am-3:21 pm

3 stops34h 21m

$881

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

mar. 7/8

2:18 pm-6:20 am

1 stop11h 02m

Reykjavik Keflavik Intl

mar. 7/15

8:50 am-4:47 pm

1 stop12h 57m

$908

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/16

Showing 1-10 of 14 results
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Compare providers for flights from St. Louis to Keflavik Intl

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Keflavik Intl in January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on St. Louis-Reykjavik Keflavik Intl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Reykjavik Keflavik Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Reykjavik Keflavik Intl Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on St. Louis-Reykjavik Keflavik Intl Airport 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 St. Louis-Reykjavik Keflavik Intl Airport 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 St. Louis to Keflavik Intl

Have a flexible travel schedule? Discover the best time to fly to Keflavik Intl from St. Louis 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.

Travel insights for flights from St. Louis to Keflavik Intl

Get recent, data-driven insights about flights from St. Louis to Keflavik Intl including ideal travel times, pricing trends, and more.

What is the cheapest month to book a flight from St. Louis to Reykjavik Keflavik Intl Airport?

Currently, November is the cheapest month in which you can book a flight from St. Louis to Reykjavik Keflavik Intl Airport (average of $328). Flying from St. Louis to Reykjavik Keflavik Intl Airport in June is currently the most expensive (average of $662). 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 STL to KEF?

Find hourly flight availability from St. Louis to Keflavik Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated enero 17, 2025.

When flying from St. Louis to Reykjavik Keflavik Intl Airport, the time of day you fly usually plays a role in the price. Save by searching for a flight in the morning, which can drop the price by up to 19% versus a flight in the afternoon.

Rainfall in Keflavik Intl by month

Plan your trip to Keflavik Intl by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Reykjavik Keflavik Intl Airport ranges from 1.6 - 3.1 inches per month. January is typically the wettest month, when rainfall can reach 3.1 in. May is typically the driest time to visit Reykjavik Keflavik Intl Airport when rainfall is around 1.6 in.

Temperature in Keflavik Intl by month

Plan your trip to Keflavik Intl by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Reykjavik Keflavik Intl Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 51.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

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 enero 17, 2025.
Delta
8.0
Very good
8,511 reviews

Entertainment

7.9

Overall

8.0

Crew

8.6

Comfort

8.0

Boarding

8.2

Food

7.3

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta
8.0
Very good
8,511 reviews
Delta
8.0
Very good
8,511 reviews

Entertainment

7.9

Overall

8.0

Crew

8.6

Comfort

8.0

Boarding

8.2

Food

7.3

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Finnair
7.6
Good
1,285 reviews
Delta
8.0
Very good
8,511 reviews

Entertainment

7.9

Overall

8.0

Crew

8.6

Comfort

8.0

Boarding

8.2

Food

7.3

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Scandinavian Airlines
7.3
Good
1,308 reviews
Delta
8.0
Very good
8,511 reviews

Entertainment

7.9

Overall

8.0

Crew

8.6

Comfort

8.0

Boarding

8.2

Food

7.3

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
8,511 reviews

Entertainment

7.9

Overall

8.0

Crew

8.6

Comfort

8.0

Boarding

8.2

Food

7.3

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Lufthansa
6.8
Okay
7,093 reviews
Delta
8.0
Very good
8,511 reviews

Entertainment

7.9

Overall

8.0

Crew

8.6

Comfort

8.0

Boarding

8.2

Food

7.3

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

Find useful and relevant information for your journey from St. Louis 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 St. Louis to Reykjavik Keflavik Intl?

    Located just 12.7 mi from the city center, Lambert-St Louis is the airport most travelers will use when flying to Reykjavik Keflavik Intl from St. Louis. Booking flights from Lambert-St Louis (STL) to Reykjavik Keflavik Intl should be relatively easy as there are 0 daily outbound flights to Reykjavik Keflavik Intl from 4 different airlines.

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

    Our cheapest airline available from St. Louis to Reykjavik Keflavik Intl Airport is British Airways. Our recent data shows that you can find tickets from as low as $619 on this airline. Additional options worth looking into are Lufthansa and American Airlines, starting at $760 and $848 round-trip. British Airways is 32% cheaper than the average price of flights available within the next 90 days to this destination.

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

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

  • How can I find direct flights from St. Louis to Keflavik Intl?

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

  • Can I find deals for business class flights from St. Louis to Keflavik Intl?

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

    Currently, November is the cheapest month in which you can book a flight from St. Louis to Reykjavik Keflavik Intl Airport (average of $328). Flying from St. Louis to Reykjavik Keflavik Intl Airport in June is currently the most expensive (average of $662). 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 St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Keflavik

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Alternative routes for St. Louis to Keflavik Intl

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Top 4 airlines flying from St. Louis to Keflavik Intl

Discover the top 4 airlines that operate flights from St. Louis 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 enero 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$568Average$909FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$595Average$913FlexibilityNo cancel feeOn-time69%
DeltaCheapest$666Average$876FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$675Average$1,142FlexibilityNo cancel feeOn-time75%
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