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Keflavik Intl

$476+ 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 9/8. Fares are subject to change and may not be available on all flights or dates of travel.
STL — KEF
Jul 5 — Jul 121
Sat 7/5
Sat 7/12
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 June 30, 2025.

Round-trip from

$563
(Booking.com)

One-way from

$476
(Kiwi.com)

Popular in

March

Cheapest in

February

Average price

$1,193
From Missouri to Reykjavik Keflavik Intl
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One-way flight from Missouri to Reykjavik Keflavik Intl
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High demand for flights, 7% potential price rise
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Cheapest flight prices on average. 2% potential price decrease ($28 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 30, 2025.

This Booking.com deal was found by Cheapflights users on 6/28. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/171:30 pmSTL - KEF
2 stops37h 45mAir Canada
Tue 8/269:50 amKEF - STL
2 stops33h 43mAir Canada
Deal found 6/28$563
This United Airlines deal was found by Cheapflights users on 6/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/138:00 amSGF - KEF
2 stops19h 10mUnited Airlines
Wed 8/209:30 amKEF - SGF
2 stops39h 54mUnited Airlines
Deal found 6/29$578
This Air Canada deal was found by Cheapflights users on 6/30. 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 8/126:27 pmMCI - KEF
2 stops32h 43mAir Canada
Wed 8/209:30 amKEF - MCI
2 stops41h 12mAir Canada
Deal found 6/30$578
This Mytrip deal was found by Cheapflights users on 6/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/149:20 amSTL - KEF
2 stops19h 00mMultiple Airlines
Thu 8/217:35 pmKEF - STL
2 stops21h 35mMultiple Airlines
Deal found 6/29$579
This United Airlines deal was found by Cheapflights users on 6/30. 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 8/191:30 pmSTL - KEF
1 stop13h 40mUnited Airlines
Tue 8/269:50 amKEF - STL
2 stops43h 03mUnited Airlines
Deal found 6/30$581
This United Airlines deal was found by Cheapflights users on 6/28. 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 8/126:27 pmMCI - KEF
2 stops32h 43mUnited Airlines
Tue 8/199:50 amKEF - MCI
2 stops33h 30mUnited Airlines
Deal found 6/28$585
This KLM deal was found by Cheapflights users on 6/29. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/195:33 pmMCI - KEF
1 stop8h 27mKLM
Tue 8/269:30 amKEF - MCI
1 stop18h 35mKLM
Deal found 6/29$601
This United Airlines deal was found by Cheapflights users on 6/27. 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.
Fri 8/228:55 amJLN - KEF
1 stop18h 35mUnited Airlines
Tue 8/269:50 amKEF - JLN
2 stops42h 53mUnited Airlines
Deal found 6/27$630
This Mytrip deal was found by Cheapflights users on 6/30. 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 8/94:23 pmMCI - KEF
2 stops34h 52mMultiple Airlines
Sun 8/179:50 amKEF - MCI
2 stops18h 03mMultiple Airlines
Deal found 6/30$659
This Travelocity deal was found by Cheapflights users on 6/29. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/45:58 amSTL - KEF
2 stops46h 57mBritish Airways
Mon 12/811:45 amKEF - STL
2 stops56h 50mBritish Airways
Deal found 6/29$677
This American Airlines deal was found by Cheapflights users on 6/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/2710:59 amMCI - KEF
2 stops24h 36mAmerican Airlines
Fri 12/511:45 amKEF - MCI
2 stops28h 00mAmerican Airlines
Deal found 6/29$680
This KLM deal was found by Cheapflights users on 6/30. 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 8/2510:45 amSTL - KEF
1 stop14h 35mKLM
Thu 9/49:30 amKEF - STL
1 stop12h 15mKLM
Deal found 6/30$681

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 June 30, 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

Sun 8/17

1:30 pm-8:15 am

2 stops37h 45m

Reykjavik Keflavik Intl

Tue 8/26

9:50 am-2:33 pm

2 stops33h 43m

$563

SpringfieldReykjavik

SGF - KEF

SGFKEF

Springfield-Branson

Wed 8/13

8:00 am-8:10 am

2 stops19h 10m

Reykjavik Keflavik Intl

Wed 8/20

9:30 am-8:24 pm

2 stops39h 54m

$578

Kansas CityReykjavik

MCI - KEF

MCIKEF

Kansas City

Tue 8/12

6:27 pm-8:10 am

2 stops32h 43m

Reykjavik Keflavik Intl

Wed 8/20

9:30 am-9:42 pm

2 stops41h 12m

$578

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Thu 8/14

9:20 am-9:20 am

2 stops19h 00m

Reykjavik Keflavik Intl

Thu 8/21

7:35 pm-12:10 pm

2 stops21h 35m

$579

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Tue 8/19

1:30 pm-8:10 am

1 stop13h 40m

Reykjavik Keflavik Intl

Tue 8/26

9:50 am-11:53 pm

2 stops43h 03m

$581

Kansas CityReykjavik

MCI - KEF

MCIKEF

Kansas City

Tue 8/12

6:27 pm-8:10 am

2 stops32h 43m

Reykjavik Keflavik Intl

Tue 8/19

9:50 am-2:20 pm

2 stops33h 30m

$585

Kansas CityReykjavik

MCI - KEF

MCIKEF

Kansas City

Tue 8/19

5:33 pm-7:00 am

1 stop8h 27m

Reykjavik Keflavik Intl

Tue 8/26

9:30 am-11:05 pm

1 stop18h 35m

$601

JoplinReykjavik

JLN - KEF

JLNKEF

Joplin

Fri 8/22

8:55 am-8:20 am

2 stops18h 25m

Reykjavik Keflavik Intl

Tue 8/26

9:50 am-11:43 pm

2 stops42h 53m

$630

Kansas CityReykjavik

MCI - KEF

MCIKEF

Kansas City

Sat 8/9

4:23 pm-8:15 am

2 stops34h 52m

Reykjavik Keflavik Intl

Sun 8/17

9:50 am-10:53 pm

2 stops18h 03m

$659

Kansas CityReykjavik

MCI - KEF

MCIKEF

Kansas City

Thu 11/27

10:59 am-5:35 pm

2 stops24h 36m

Reykjavik Keflavik Intl

Fri 12/5

11:45 am-9:45 am

2 stops28h 00m

$680

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/28

Showing 1-10 of 32 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 $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.

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 June 30, 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.

How much does it cost to fly round-trip from Missouri to Reykjavik Keflavik Intl Airport?

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 June 30, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Delta, and KLM from Missouri to Reykjavik Keflavik Intl Airport to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Entertainment

7.1

Overall

8.0

Comfort

7.8

Food

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Entertainment

7.1

Overall

8.0

Comfort

7.8

Food

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.
Delta
8.0
Very good
7,969 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Entertainment

7.1

Overall

8.0

Comfort

7.8

Food

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.
KLM
7.8
Good
1,366 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Entertainment

7.1

Overall

8.0

Comfort

7.8

Food

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.
Finnair
7.6
Good
1,299 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Entertainment

7.1

Overall

8.0

Comfort

7.8

Food

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.
United Airlines
7.4
Good
8,852 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Entertainment

7.1

Overall

8.0

Comfort

7.8

Food

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.

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.

  • What are the cheapest airlines to fly from Missouri to Reykjavik Keflavik Intl Airport one-way?

    The cheapest airlines for a one-way flight from Missouri to Reykjavik Keflavik Intl Airport are Air Canada ($495), United Airlines ($500), and KLM ($550).

  • 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 $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 Missouri?

Book flights to Missouri if you plan to visit one of these locations
Keflavik
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Top 4 airlines flying from Missouri to Keflavik Intl

Discover the top 4 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 June 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$370Average$1,021FlexibilityNo cancel feeOn-time75%
Air CanadaCheapest$566Average$729FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$586Average$945FlexibilityNo cancel feeOn-time69%
DeltaCheapest$636Average$984FlexibilityNo cancel feeOn-timeN/A

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