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Keflavik Intl

$610+ Cheap flights from Missouri 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 11/12. Fares are subject to change and may not be available on all flights or dates of travel.
STL — KEF
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
1 adult, Economy
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Cheap flight deals from Missouri to Keflavik Intl

Keep the following information in mind while searching for Missouri to Keflavik Intl flight deals. Data was last updated September 17, 2025.

Round-trip from

$620
(KAYAK)

Popular in

June

Cheapest in

February

Average price

$879
From Missouri to Reykjavik Keflavik Intl
Search Deals
Highest demand for flights based on searches. 18% potential increase in price ($216 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($26 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 Missouri to Keflavik Intl

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

This KAYAK deal was found by Cheapflights users on 9/15. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/123:50 pmSTL - KEF
2 stops16h 25mLufthansa
Tue 11/183:20 pmKEF - STL
1 stop28h 35mLufthansa
Deal found 9/15$610
This Kiwi.com deal was found by Cheapflights users on 9/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/127:45 pmSTL - KEF
1 stop28h 20mMultiple Airlines
Tue 11/184:55 pmKEF - STL
1 stop22h 12mMultiple Airlines
Deal found 9/14$664
This Finnair 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/41:45 pmMCI - KEF
2 stops37h 30mFinnair
Mon 11/1710:00 amKEF - MCI
2 stops39h 16mFinnair
Deal found 9/16$669
This Kiwi.com deal was found by Cheapflights users on 9/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/117:45 pmSTL - KEF
1 stop28h 20mMultiple Airlines
Tue 11/184:55 pmKEF - STL
1 stop22h 12mMultiple Airlines
Deal found 9/14$682
This KLM 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/299:59 amMCI - KEF
1 stop18h 31mMultiple Airlines
Tue 10/78:45 amKEF - MCI
1 stop13h 21mMultiple Airlines
Deal found 9/16$698
This KAYAK deal was found by Cheapflights users on 9/14. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/116:43 pmSTL - KEF
2 stops37h 32mLufthansa
Tue 11/183:20 pmKEF - STL
1 stop28h 35mLufthansa
Deal found 9/14$703
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/165:15 amMCI - KEF
2 stops20h 00mMultiple Airlines
Thu 10/235:00 pmKEF - MCI
2 stops29h 31mMultiple Airlines
Deal found 9/16$731
This FlightHub deal was found by Cheapflights users on 9/15. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/131:55 pmSTL - KEF
2 stops28h 00mScandinavian Airlines
Wed 11/1911:30 amKEF - STL
2 stops39h 34mScandinavian Airlines
Deal found 9/15$738
This Finnair 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/313:03 pmMCI - KEF
2 stops21h 12mMultiple Airlines
Fri 11/710:00 amKEF - MCI
2 stops41h 29mMultiple Airlines
Deal found 9/16$744
This Finnair 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/51:20 pmSTL - KEF
2 stops37h 55mFinnair
Wed 11/1210:00 amKEF - STL
2 stops39h 30mFinnair
Deal found 9/17$754
This Mytrip deal was found by Cheapflights users on 9/15. 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.
Sun 10/195:15 amMCI - KEF
2 stops18h 40mMultiple Airlines
Thu 10/233:05 pmKEF - MCI
3 stops30h 11mMultiple Airlines
Deal found 9/15$761
This United Airlines deal was found by Cheapflights users on 9/15. 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 Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/1411:05 amSTL - KEF
3 stops20h 15mMultiple Airlines
Tue 11/183:20 pmKEF - STL
2 stops29h 05mMultiple Airlines
Deal found 9/15$772

Cheapflights Fare Finder

 
Customize your flight search to find flights from Missouri 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 17, 2025.
Use the filters below to find and compare flights from Missouri to Reykjavik Keflavik Intl Airport that are best for you.

Fly from

Missouri

Fly to

Keflavik Intl

Route

Depart

Return

Price

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Wed 11/12

3:50 pm-2:15 pm

2 stops16h 25m

Reykjavik Keflavik Intl

Tue 11/18

3:20 pm-1:55 pm

1 stop28h 35m

$610

Kansas CityReykjavik

MCI - KEF

MCIKEF

Kansas City

Thu 3/5

2:11 pm-9:15 am

2 stops37h 04m

Reykjavik Keflavik Intl

Thu 3/12

10:00 am-8:03 pm

2 stops39h 03m

$668

Kansas CityReykjavik

MCI - KEF

MCIKEF

Kansas City

Mon 9/29

9:59 am-9:30 am

1 stop18h 31m

Reykjavik Keflavik Intl

Tue 10/7

8:45 am-5:06 pm

1 stop13h 21m

$698

Kansas CityReykjavik

MCI - KEF

MCIKEF

Kansas City

Thu 10/16

5:15 am-6:15 am

2 stops20h 00m

Reykjavik Keflavik Intl

Thu 10/23

5:00 pm-5:31 pm

2 stops29h 31m

$731

Kansas CityReykjavik

MCI - KEF

MCIKEF

Kansas City

Fri 11/7

1:45 pm-9:15 am

2 stops37h 30m

Reykjavik Keflavik Intl

Fri 11/14

10:00 am-9:29 pm

2 stops41h 29m

$744

Kansas CityReykjavik

MCI - KEF

MCIKEF

Kansas City

Fri 10/31

3:03 pm-5:15 pm

2 stops21h 12m

Reykjavik Keflavik Intl

Fri 11/7

10:00 am-9:29 pm

2 stops41h 29m

$744

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Fri 11/14

11:42 am-5:15 pm

2 stops23h 33m

Reykjavik Keflavik Intl

Tue 11/18

10:00 am-7:30 pm

2 stops39h 30m

$754

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Tue 11/11

6:43 pm-2:15 pm

2 stops37h 32m

Reykjavik Keflavik Intl

Tue 11/18

3:20 pm-1:55 pm

1 stop28h 35m

$771

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Fri 11/14

11:05 am-1:20 pm

3 stops20h 15m

Reykjavik Keflavik Intl

Tue 11/18

3:20 pm-2:25 pm

2 stops29h 05m

$772

Kansas CityReykjavik

MCI - KEF

MCIKEF

Kansas City

Sun 10/19

5:15 am-8:45 am

2 stops22h 30m

Reykjavik Keflavik Intl

Thu 10/23

5:10 pm-4:16 pm

2 stops28h 06m

$779

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/17

Showing 1-10 of 20 results
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Best time to book a flight from Missouri to Keflavik Intl

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

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

Currently, November is the cheapest month in which you can book a flight from Missouri to Reykjavik Keflavik Intl Airport (average of $328). Flying from Missouri to Reykjavik Keflavik Intl Airport in June is currently the most expensive (average of $656). 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 MO to KEF?

Find hourly flight availability from Missouri 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 September 17, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Missouri to Reykjavik Keflavik Intl Airport as you normally would.

Related info for your journey

Find useful and relevant information for your journey from Missouri to Keflavik Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

    There are many flights that can get you from Missouri to Reykjavik Keflavik Intl Airport in 16h 25m. Fly via Lufthansa or Finnair to get the fastest option. The distance between Missouri and Reykjavik Keflavik Intl Airport is about 3191 mi. This flight may include one or multiple stops.

  • What are the most popular routes from Missouri to Reykjavik Keflavik Intl Airport?

    The most popular flight routes from Missouri to Reykjavik Keflavik Intl Airport are Lambert-St Louis - Reykjavik Keflavik Intl, Kansas City - Reykjavik Keflavik Intl and Springfield-Branson - Reykjavik Keflavik Intl.

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

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

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

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

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

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

    Currently, November is the cheapest month in which you can book a flight from Missouri to Reykjavik Keflavik Intl Airport (average of $328). Flying from Missouri to Reykjavik Keflavik Intl Airport in June is currently the most expensive (average of $656). 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 5 airlines flying from Missouri to Keflavik Intl

Discover the top 5 airlines that operate flights from Missouri 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 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$370Average$969FlexibilityNo cancel feeOn-time75%
Air CanadaCheapest$566Average$672FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$595Average$938FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$615Average$769FlexibilityNo cancel feeOn-time70%
DeltaCheapest$636Average$1,093FlexibilityNo cancel feeOn-timeN/A

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