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 KLM. Our recent data shows that you can find tickets from as low as $609 on this airline. Additional options worth looking into are Air Canada and Air France, starting at $657 and $733 round-trip. KLM is 33% cheaper than the average price of flights available within the next 90 days to this destination.

What are the cheapest airlines to fly from St. Louis to Reykjavik Keflavik Intl Airport one-way?

$456 is the cheapest one-way deal found within the past few days, from Air Canada. You may also be able to find cheap deals on WestJet and KLM, with prices starting from $466 and $754, respectively.

What is the cheapest day to fly from St. Louis to Reykjavik Keflavik Intl Airport?

Travelers seeking maximum savings on their St. Louis to Reykjavik Keflavik Intl Airport flight should consider departing on Wednesday mornings when fares are most often at their lowest. Thursday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

What are the most popular airlines that fly from St. Louis to Reykjavik Keflavik Intl Airport?

Before booking your flight from St. Louis to Reykjavik Keflavik Intl Airport check out the most popular airlines for this route: Air Canada, Delta or KLM.

What is the cheapest day to fly round-trip from St. Louis to Reykjavik Keflavik Intl Airport?

Users have found that leaving on a Tuesday can be a cost-effective option. It’s possible to save up to 39% on your flight compared to booking on days when demand is much higher.

How far in advance should I book a flight from St. Louis to Reykjavik Keflavik Intl Airport?

Find a great deal and save up to 70% by booking at least 29 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from St. Louis to Reykjavik Keflavik Intl Airport within the next two weeks, with the cheapest ticket starting at $748.

What is the cheapest month to fly from St. Louis to Reykjavik Keflavik Intl Airport?

The best pricing can be found in the month of January. Prices to Reykjavik Keflavik Intl Airport from St. Louis average $945. You can even find prices in January for less than $945, as users have found deals to Reykjavik Keflavik Intl Airport from as low as $748. The month of March appears to be one of the more expensive times to travel to Reykjavik Keflavik Intl Airport from St. Louis. Flying in the targeted month can save you up to 25%.

What is the cheapest time of day to fly from STL to KEF?

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.

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.

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.

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.

$456+ Flights from St. Louis to Reykjavik Keflavik Intl Airport

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1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

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Cheap flight deals from St. Louis to Keflavik Intl

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$609 (KLM)
One-way from	$456 (Air Canada)
Popular in	November
Cheapest in	April
Average price	$861

Provider with most accurate pricing for Lambert-St Louis-Reykjavik Keflavik Intl flight deals.

Search Deals

Provider most trusted by Cheapflights users for Lambert-St Louis-Reykjavik Keflavik Intl flights.

Search Deals

From Lambert-St Louis to Reykjavik Keflavik Intl

Search Deals

One-way flight from Lambert-St Louis to Reykjavik Keflavik Intl

Search Deals

Highest demand for flights based on searches. 2% potential increase in price ($22 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($25 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in March 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 March 26, 2025.

Mon 5/1210:45 amSTL - KEF

1 stop14h 35mKLM

Tue 5/208:50 amKEF - STL

1 stop12h 57mKLM

Deal found 3/24

$609

Mon 5/1211:32 amSTL - KEF

2 stops13h 48mMultiple Airlines

Tue 5/208:50 amKEF - STL

2 stops19h 48mMultiple Airlines

Deal found 3/24

$613

Fri 9/54:05 pmSTL - KEF

2 stops35h 30mAir Canada

Sat 9/1310:00 amKEF - STL

1 stop10h 16mAir Canada

Deal found 3/24

$657

Sat 4/2610:32 amSTL - KEF

2 stops17h 58mAir France

Mon 5/511:25 amKEF - STL

2 stops14h 14mAir France

Deal found 3/24

$733

Sun 8/249:17 amSTL - KEF

1 stop18h 13mUnited Airlines

Mon 9/112:00 pmKEF - STL

1 stop31h 33mUnited Airlines

Deal found 3/24

$755

Sat 4/265:33 pmSTL - KEF

2 stops49h 02mLufthansa

Sat 5/312:25 amKEF - STL

1 stop18h 05mLufthansa

Deal found 3/24

$793

Mon 8/2510:45 amSTL - KEF

1 stop14h 35mDelta

Thu 9/49:30 amKEF - STL

1 stop9h 46mDelta

Deal found 3/25

$799

Mon 9/13:30 pmSTL - KEF

2 stops27h 20mScandinavian Airlines

Sat 9/65:10 pmKEF - STL

2 stops32h 37mScandinavian Airlines

Deal found 3/25

$1,153

Best flights from St. Louis to Keflavik Intl
Discover carefully curated flight deals from St. Louis to Keflavik Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 26, 2025.

Mon 5/1210:45 amSTL - KEF

1 stop14h 35mKLM

Tue 5/208:50 amKEF - STL

1 stop12h 57mKLM

Deal found 3/24

$609

Mon 5/1211:32 amSTL - KEF

2 stops13h 48mMultiple Airlines

Tue 5/208:50 amKEF - STL

2 stops19h 48mMultiple Airlines

Deal found 3/24

$613

Fri 9/54:05 pmSTL - KEF

2 stops35h 30mAir Canada

Sat 9/1310:00 amKEF - STL

2 stops38h 57mAir Canada

Deal found 3/24

$657

Sat 4/2610:32 amSTL - KEF

2 stops17h 58mAir France

Mon 5/511:25 amKEF - STL

2 stops14h 14mAir France

Deal found 3/24

$733

Sun 8/249:17 amSTL - KEF

1 stop18h 13mUnited Airlines

Mon 9/112:00 pmKEF - STL

1 stop31h 33mUnited Airlines

Deal found 3/24

$755

Sat 4/265:33 pmSTL - KEF

2 stops49h 02mLufthansa

Sat 5/312:25 amKEF - STL

1 stop18h 05mLufthansa

Deal found 3/24

$793

Mon 8/2510:45 amSTL - KEF

1 stop14h 35mDelta

Thu 9/49:30 amKEF - STL

1 stop9h 46mDelta

Deal found 3/25

$799

Mon 9/13:30 pmSTL - KEF

2 stops27h 20mScandinavian Airlines

Sat 9/65:10 pmKEF - STL

2 stops32h 37mScandinavian Airlines

Deal found 3/25

$1,153

Last-minute flights from St. Louis to Keflavik Intl
Discover last-minute flight deals from St. Louis to Keflavik Intl. Data last updated March 26, 2025 and is based on user searches.

Fri 3/282:21 pmSTL - KEF

2 stops15h 34mAmerican Airlines

Mon 3/3110:45 amKEF - STL

2 stops27h 13mAmerican Airlines

Deal found 3/24

$1,195

Fri 4/43:30 pmSTL - KEF

1 stop16h 35mLufthansa

Wed 4/912:25 amKEF - STL

2 stops20h 22mLufthansa

Deal found 3/23

$1,136

Fri 4/41:48 pmSTL - KEF

2 stops14h 42mAir France

Thu 4/1011:25 amKEF - STL

2 stops15h 11mAir France

Deal found 3/23

$1,169

Fri 4/186:44 amSTL - KEF

1 stop21h 41mAlaska Airlines

Fri 4/257:45 pmKEF - STL

1 stop33h 14mAlaska Airlines

Deal found 3/25

$1,226

Sat 4/2610:32 amSTL - KEF

2 stops17h 58mAir France

Mon 5/511:25 amKEF - STL

2 stops14h 14mAir France

Deal found 3/24

$733

Sat 4/265:33 pmSTL - KEF

2 stops49h 02mMultiple Airlines

Sun 5/412:25 amKEF - STL

2 stops24h 33mMultiple Airlines

Deal found 3/24

$745

Sat 4/265:33 pmSTL - KEF

2 stops49h 02mLufthansa

Sat 5/312:25 amKEF - STL

1 stop18h 05mLufthansa

Deal found 3/24

$793

One-way flights from St. Louis to Keflavik Intl
Search for one-way flight options from St. Louis to Keflavik Intl. Find affordable one-way fares based on user searches. Data last updated March 26, 2025.

Wed 8/271:30 pmSTL - KEF

1 stop13h 40mAir Canada

Deal found 3/24

$456

Wed 8/278:55 amSTL - KEF

2 stops18h 20mWestJet

Deal found 3/25

$466

Sun 6/222:52 pmSTL - KEF

3 stops36h 23mMultiple Airlines

Deal found 3/24

$486

Sun 6/223:57 pmSTL - KEF

1 stop10h 03mKLM

Deal found 3/24

$754

Cheapflights Fare Finder

Use the filters below to find and compare flights from St. Louis to Reykjavik Keflavik Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Mon 5/12

10:45 am-6:20 am

1 stop14h 35m

Reykjavik Keflavik Intl

Tue 5/20

8:50 am-4:47 pm

1 stop12h 57m

$609

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Mon 5/12

11:32 am-6:20 am

2 stops13h 48m

Reykjavik Keflavik Intl

Tue 5/20

8:50 am-11:38 pm

2 stops19h 48m

$613

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Fri 9/5

4:05 pm-8:35 am

2 stops35h 30m

Reykjavik Keflavik Intl

Sat 9/13

10:00 am-3:16 pm

1 stop10h 16m

$657

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Sat 4/26

10:32 am-9:30 am

2 stops17h 58m

Reykjavik Keflavik Intl

Mon 5/5

11:25 am-8:39 pm

2 stops14h 14m

$733

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Sun 8/24

9:17 am-8:30 am

1 stop18h 13m

Reykjavik Keflavik Intl

Mon 9/1

12:00 pm-2:33 pm

1 stop31h 33m

$755

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Sat 4/26

5:33 pm-11:35 pm

2 stops49h 02m

Reykjavik Keflavik Intl

Sat 5/3

12:25 am-1:30 pm

1 stop18h 05m

$793

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Mon 8/25

10:45 am-6:20 am

1 stop14h 35m

Reykjavik Keflavik Intl

Thu 9/4

9:30 am-2:16 pm

1 stop9h 46m

$799

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Mon 9/1

3:30 pm-11:50 pm

2 stops27h 20m

Reykjavik Keflavik Intl

Sat 9/6

5:10 pm-8:47 pm

2 stops32h 37m

$1,153

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Wed 8/27

1:30 pm-8:10 am

1 stop13h 40m

$456

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Wed 8/27

8:55 am-8:15 am

2 stops18h 20m

$466

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/24

Showing 1-10 of 12 results

Compare providers for flights from St. Louis to Keflavik Intl

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 March.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*3 stars
eDreams	Price Accuracy3 stars	Trust Score*3 stars
AranGrant	Price Accuracy3 stars	Trust Score*1 star

*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.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Reykjavik Keflavik Intl Airport

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 July is currently the most expensive (average of $651). 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.

Rainfall in Keflavik Intl 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

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

To help decide which airline to fly from St. Louis to Reykjavik, see what other customers have to say about Delta, KLM and Air France. 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

7,891 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

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

Delta

8.0

Very good

7,891 reviews

Delta

8.0

Very good

7,891 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

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

KLM

7.8

Good

1,318 reviews

Delta

8.0

Very good

7,891 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

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

Air France

7.4

Good

1,423 reviews

Delta

8.0

Very good

7,891 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

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

United Airlines

7.4

Good

8,608 reviews

Delta

8.0

Very good

7,891 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

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

Scandinavian Airlines

7.3

Good

1,325 reviews

Delta

8.0

Very good

7,891 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

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

Related info for your journey

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 KLM. Our recent data shows that you can find tickets from as low as $609 on this airline. Additional options worth looking into are Air Canada and Air France, starting at $657 and $733 round-trip. KLM is 33% cheaper than the average price of flights available within the next 90 days to this destination.
What are the cheapest airlines to fly from St. Louis to Reykjavik Keflavik Intl Airport one-way?
$456 is the cheapest one-way deal found within the past few days, from Air Canada. You may also be able to find cheap deals on WestJet and KLM, with prices starting from $466 and $754, respectively.
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 July is currently the most expensive (average of $651). 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

Keflavik

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Top 4 airlines flying from St. Louis to Keflavik Intl

Airline	Cheapest	Average	Flexibility	On-time
Air Canada	Cheapest$566	Average$748	FlexibilityNo cancel fee	On-time67%
United Airlines	Cheapest$626	Average$1,090	FlexibilityNo cancel fee	On-time69%
Delta	Cheapest$666	Average$956	FlexibilityNo cancel fee	On-timeN/A
KLM	Cheapest$856	Average$1,142	FlexibilityNo cancel fee	On-time75%

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$456+ 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 8/27. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from St. Louis to Keflavik Intl with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from St. Louis to Keflavik Intl

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from St. Louis to Keflavik Intl

Cheapest flights from St. Louis to Keflavik IntlExplore 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 March 26, 2025.

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 March 26, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from St. Louis to Reykjavik Keflavik Intl Airport that are best for you.

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 March.

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.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Reykjavik Keflavik Intl Airport

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

Rainfall in Keflavik Intl by month

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

Temperature in Keflavik Intl by month

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

Reviews of airlines servicing Keflavik Intl

To help decide which airline to fly from St. Louis to Reykjavik, see what other customers have to say about Delta, KLM and Air France. 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.

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?

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

What are the cheapest airlines to fly from St. Louis to Reykjavik Keflavik Intl Airport one-way?

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

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

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

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

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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

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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 March 26, 2025.