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Keflavik Intl

$543+ Cheap flights from Missouri 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 11/8. Fares are subject to change and may not be available on all flights or dates of travel.
STL — KEF
Dec 3 — Dec 101
Wed 12/3
Wed 12/10
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 November 3, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

Expedia
3 stars

Round-trip from

$624
(Finnair)

One-way from

$543
(Kiwi.com)

Popular in

March

Cheapest in

January

Average price

$1,264
Provider with most accurate pricing for Lambert-St Louis-Reykjavik (REK) flight deals.
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Provider most trusted by Cheapflights users for Lambert-St Louis-Reykjavik (REK) flights.
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From Missouri to Reykjavik Keflavik Intl
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One-way flight from Missouri to Reykjavik Keflavik Intl
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Highest demand for flights based on searches. 10% potential increase in price ($116 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($36 potential savings vs. average RT price).
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Average for round-trip flights in November 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 November 3, 2025.

This Finnair deal was found by Cheapflights users on 11/2. 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 12/21:20 pmSTL - KEF
2 stops37h 40mMultiple Airlines
Tue 12/910:00 amKEF - STL
2 stops30h 25mMultiple Airlines
Deal found 11/2$683
This Trip.com deal was found by Cheapflights users on 11/1. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/41:44 pmMCI - KEF
2 stops37h 31mFinnair
Mon 12/89:45 amKEF - MCI
2 stops39h 28mFinnair
Deal found 11/1$683
This Kiwi.com deal was found by Cheapflights users on 11/2. 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 12/89:54 amSTL - KEF
1 stop14h 21mMultiple Airlines
Mon 12/155:15 pmKEF - STL
1 stop35h 18mMultiple Airlines
Deal found 11/2$715
This Ovago deal was found by Cheapflights users on 11/1. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/2411:36 amMCI - KEF
2 stops20h 44mLufthansa
Tue 12/23:20 pmKEF - MCI
2 stops36h 38mLufthansa
Deal found 11/1$756
This Gotogate deal was found by Cheapflights users on 10/31. 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.
Sat 11/297:33 pmMCI - KEF
2 stops57h 22mBritish Airways
Sat 12/611:55 amKEF - MCI
2 stops39h 34mBritish Airways
Deal found 10/31$761
This KAYAK deal was found by Cheapflights users on 11/1. 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 11/1$769
This Kiwi.com deal was found by Cheapflights users on 11/3. 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 12/88:45 pmMCI - KEF
1 stop27h 20mMultiple Airlines
Mon 12/154:55 pmKEF - MCI
2 stops33h 49mMultiple Airlines
Deal found 11/3$828
This Kiwi.com deal was found by Cheapflights users on 10/31. 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 11/298:28 pmMCI - KEF
1 stop27h 37mMultiple Airlines
Sat 12/64:55 pmKEF - MCI
2 stops24h 08mMultiple Airlines
Deal found 10/31$878
This Finnair deal was found by Cheapflights users on 11/1. 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.
Sat 11/291:45 pmMCI - KEF
2 stops21h 20mMultiple Airlines
Sun 12/710:00 amKEF - MCI
2 stops39h 13mMultiple Airlines
Deal found 11/1$958
This oojo deal was found by Cheapflights users on 11/1. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/82:01 pmSGF - KEF
2 stops38h 49mBritish Airways
Mon 12/1511:50 amKEF - SGF
2 stops38h 58mBritish Airways
Deal found 11/1$978
This Kiwi.com deal was found by Cheapflights users on 11/1. 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.
Thu 12/46:55 amMCI - KEF
1 stop17h 20mMultiple Airlines
Mon 12/85:00 pmKEF - MCI
1 stop30h 27mMultiple Airlines
Deal found 11/1$1,009
This Mytrip deal was found by Cheapflights users on 11/2. 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 12/84:05 pmSTL - KEF
2 stops25h 50mMultiple Airlines
Wed 12/105:00 pmKEF - STL
2 stops26h 52mMultiple Airlines
Deal found 11/2$1,112

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 November 3, 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

Kansas CityReykjavik

MCI - KEF

MCIKEF

Kansas City

Sun 2/8

1:56 pm-9:15 am

2 stops37h 19m

Reykjavik Keflavik Intl

Mon 2/16

9:45 am-6:45 pm

2 stops39h 00m

$624

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Tue 12/2

1:20 pm-9:00 am

2 stops37h 40m

Reykjavik Keflavik Intl

Tue 12/9

10:00 am-10:25 am

2 stops30h 25m

$683

Kansas CityReykjavik

MCI - KEF

MCIKEF

Kansas City

Thu 12/4

1:44 pm-9:15 am

2 stops37h 31m

Reykjavik Keflavik Intl

Mon 12/8

9:45 am-7:13 pm

2 stops39h 28m

$683

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Mon 12/8

9:54 am-6:15 am

1 stop14h 21m

Reykjavik Keflavik Intl

Mon 12/15

5:15 pm-10:33 pm

1 stop35h 18m

$715

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Thu 1/1

11:41 am-9:15 am

2 stops39h 34m

Reykjavik Keflavik Intl

Mon 1/12

10:00 am-7:29 pm

2 stops39h 29m

$723

Kansas CityReykjavik

MCI - KEF

MCIKEF

Kansas City

Mon 11/24

11:36 am-2:20 pm

2 stops20h 44m

Reykjavik Keflavik Intl

Tue 12/2

3:20 pm-9:58 pm

2 stops36h 38m

$756

Kansas CityReykjavik

MCI - KEF

MCIKEF

Kansas City

Sat 11/29

7:33 pm-10:55 am

2 stops57h 22m

Reykjavik Keflavik Intl

Sat 12/6

11:55 am-9:29 pm

2 stops39h 34m

$761

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

$769

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Fri 11/28

4:46 pm-10:40 am

2 stops35h 54m

Reykjavik Keflavik Intl

Fri 12/5

11:50 am-7:05 pm

2 stops37h 15m

$779

Kansas CityReykjavik

MCI - KEF

MCIKEF

Kansas City

Sat 2/21

1:59 pm-9:15 am

2 stops37h 16m

Reykjavik Keflavik Intl

Sat 2/28

6:00 pm-12:05 am

2 stops36h 05m

$789

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/2

Showing 1-10 of 25 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, September is the cheapest month in which you can book a flight from Missouri to Reykjavik Keflavik Intl Airport (average of $293). Flying from Missouri to Reykjavik Keflavik Intl Airport in December is currently the most expensive (average of $1,356). 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 November 3, 2025.

Unlike in the evening, when flights are generally more expensive, you can save up to 36% on flights from Missouri to Reykjavik Keflavik Intl Airport by exploring options for tickets at noon.

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 20h 44m. Fly via Finnair, Lufthansa, or British Airways to get the fastest option. The distance between Missouri and Reykjavik Keflavik Intl Airport is about 3291 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, September is the cheapest month in which you can book a flight from Missouri to Reykjavik Keflavik Intl Airport (average of $293). Flying from Missouri to Reykjavik Keflavik Intl Airport in December is currently the most expensive (average of $1,356). 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 November 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$370Average$969FlexibilityNo cancel feeOn-time75%
Air CanadaCheapest$566Average$748FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$595Average$929FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$615Average$769FlexibilityNo cancel feeOn-time70%
DeltaCheapest$636Average$1,055FlexibilityNo cancel feeOn-timeN/A

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