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Cheap flights from St. Louis to Reykjavik from $361

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Reykjavik departing on 8/18. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from St. Louis to Reykjavik

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
7:00 am - 7:00 am
STL
-
KEF
19h 00m
1 stop
United Airlines Logo
9:15 am - 3:43 pm
KEF
-
STL
35h 28m
2 stops
$784United Airlines
Mon, Sep 21 - Wed, Sep 30
United Airlines Logo
10:53 am - 8:50 am
STL
-
KEF
16h 57m
1 stop
United Airlines Logo
9:15 am - 2:17 pm
KEF
-
STL
34h 02m
2 stops
$785United Airlines
Mon, Sep 21 - Wed, Sep 30
United Airlines Logo
4:50 pm - 7:55 am
STL
-
KEF
34h 05m
2 stops
United Airlines Logo
9:15 am - 2:17 pm
KEF
-
STL
34h 02m
2 stops
$788United Airlines
Mon, Sep 21 - Wed, Sep 30
United Airlines Logo
8:40 am - 8:50 am
STL
-
KEF
19h 10m
2 stops
United Airlines Logo
9:15 am - 9:21 pm
KEF
-
STL
41h 06m
2 stops
$789United Airlines
Mon, Sep 21 - Wed, Sep 30
United Airlines Logo
8:50 am - 8:50 am
STL
-
KEF
19h 00m
1 stop
United Airlines Logo
9:15 am - 6:41 pm
KEF
-
STL
14h 26m
1 stop
$798United Airlines
Mon, Sep 21 - Wed, Sep 30
Air France Logo
3:52 pm - 7:00 am
STL
-
KEF
10h 08m
1 stop
Air France Logo
9:30 am - 4:47 pm
KEF
-
STL
12h 17m
1 stop
$804Air France
Mon, Sep 21 - Wed, Sep 30
United Airlines Logo
12:10 pm - 7:55 am
STL
-
KEF
14h 45m
1 stop
United Airlines Logo
9:15 am - 11:44 pm
KEF
-
STL
43h 29m
2 stops
$860United Airlines
Tue, Oct 13 - Sun, Oct 18
United Airlines Logo
7:30 am - 7:55 am
STL
-
KEF
19h 25m
3 stops
United Airlines Logo
9:15 am - 11:44 pm
KEF
-
STL
43h 29m
2 stops
$864United Airlines
Tue, Oct 13 - Sun, Oct 18
Air Canada Logo
12:10 pm - 7:55 am
STL
-
KEF
14h 45m
1 stop
Air Canada Logo
9:15 am - 6:41 pm
KEF
-
STL
14h 26m
1 stop
$873Air Canada
Tue, Oct 13 - Sun, Oct 18
Multiple Airlines Logo
12:10 pm - 8:45 am
STL
-
KEF
39h 35m
2 stops
Multiple Airlines Logo
2:45 pm - 1:25 pm
KEF
-
STL
27h 40m
2 stops
$875Multiple Airlines
Sat, Oct 10 - Sat, Oct 17

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Air Canada flights from St. Louis to Reykjavik

Our best Air Canada deals on St. Louis to Reykjavik flight tickets
Air Canada
Oct 13
STL12:10 pmLambert-St Louis
14h 45m
1 stop
KEF7:55 amReykjavik Keflavik Intl
Oct 18
KEF9:15 amReykjavik Keflavik Intl
14h 26m
1 stop
STL6:41 pmLambert-St Louis
$873
Air Canada
Oct 10
STL8:00 amLambert-St Louis
18h 55m
2 stops
KEF7:55 amReykjavik Keflavik Intl
Oct 17
KEF10:00 amReykjavik Keflavik Intl
34h 43m
2 stops
STL3:43 pmLambert-St Louis
$899
Air Canada
Oct 9
STL2:40 pmLambert-St Louis
36h 15m
2 stops
KEF7:55 amReykjavik Keflavik Intl
Oct 17
KEF10:00 amReykjavik Keflavik Intl
34h 43m
2 stops
STL3:43 pmLambert-St Louis
$903

United Airlines flights from St. Louis to Reykjavik

Our best United Airlines deals on St. Louis to Reykjavik flight tickets
United Airlines
Sep 21
STL7:00 amLambert-St Louis
19h 00m
1 stop
KEF7:00 amReykjavik Keflavik Intl
Sep 30
KEF9:15 amReykjavik Keflavik Intl
35h 28m
2 stops
STL3:43 pmLambert-St Louis
$784
United Airlines
Sep 21
STL10:53 amLambert-St Louis
16h 57m
1 stop
KEF8:50 amReykjavik Keflavik Intl
Sep 30
KEF9:15 amReykjavik Keflavik Intl
34h 02m
2 stops
STL2:17 pmLambert-St Louis
$785
United Airlines
Sep 21
STL4:50 pmLambert-St Louis
34h 05m
2 stops
KEF7:55 amReykjavik Keflavik Intl
Sep 30
KEF9:15 amReykjavik Keflavik Intl
34h 02m
2 stops
STL2:17 pmLambert-St Louis
$788

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Reykjavik 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, momondo users made 832,500 searches. Data last updated June 22, 2026.
Use the filters below to find and compare flights from St. Louis to Reykjavik that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Mon 9/21

7:00 am-7:00 am

1 stop19h 00m

Reykjavik Keflavik Intl

Wed 9/30

9:15 am-3:43 pm

2 stops35h 28m

$784

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Mon 9/21

10:53 am-8:50 am

1 stop16h 57m

Reykjavik Keflavik Intl

Wed 9/30

9:15 am-2:17 pm

2 stops34h 02m

$785

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Mon 9/21

4:50 pm-7:55 am

2 stops34h 05m

Reykjavik Keflavik Intl

Wed 9/30

9:15 am-2:17 pm

2 stops34h 02m

$788

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Mon 9/21

8:40 am-8:50 am

2 stops19h 10m

Reykjavik Keflavik Intl

Wed 9/30

9:15 am-9:21 pm

2 stops41h 06m

$789

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Mon 9/21

8:50 am-8:50 am

1 stop19h 00m

Reykjavik Keflavik Intl

Wed 9/30

9:15 am-6:41 pm

1 stop14h 26m

$798
Quickest round-trip

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Mon 9/21

3:52 pm-7:00 am

1 stop10h 08m

Reykjavik Keflavik Intl

Wed 9/30

9:30 am-4:47 pm

1 stop12h 17m

$804

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Tue 10/13

12:10 pm-7:55 am

1 stop14h 45m

Reykjavik Keflavik Intl

Sun 10/18

9:15 am-11:44 pm

2 stops43h 29m

$860

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Tue 10/13

7:30 am-7:55 am

3 stops19h 25m

Reykjavik Keflavik Intl

Sun 10/18

9:15 am-11:44 pm

2 stops43h 29m

$864

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Tue 10/13

12:10 pm-7:55 am

1 stop14h 45m

Reykjavik Keflavik Intl

Sun 10/18

9:15 am-6:41 pm

1 stop14h 26m

$873

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Sat 10/10

12:10 pm-8:45 am

2 stops39h 35m

Reykjavik Keflavik Intl

Sat 10/17

2:45 pm-1:25 pm

2 stops27h 40m

$875

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Reykjavik from

How to get the cheapest flight ticket from St. Louis to Reykjavik

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest airline that flies from Lambert-St Louis to Reykjavik?

United Airlines is the most popular carrier operating from Lambert-St Louis to Reykjavik

What airlines fly to Reykjavik?

United Airlines, Delta and Air Canada are the top three most popular airlines that fly to Reykjavik from St. Louis according to our data. United Airlines is the first choice among our users, with 43% of people opting to fly with this airline when traveling to Reykjavik. Keep in mind that there are 4 different airlines that fly to Reykjavik on a routine basis, so you have a few additional options to choose from.

When to book flights from St. Louis to Reykjavik

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Reykjavik according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap St. Louis to Reykjavik (STL to REK) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Reykjavik

Fastest flight time

14h 40m

Direct flights

None
The fastest flight from St. Louis to Reykjavik takes 14h 40m
There are no direct flights from St. Louis to Reykjavik. There are no popular flight routes from St. Louis to Reykjavik.
Search flight deals

Frequently asked questions about flying from St. Louis to Reykjavik

  • How far is Lambert-St Louis to Reykjavik by plane?

    Reykjavik is 3212.7 mi away from Lambert-St Louis. Typically, this will take 14h 40m by plane in normal conditions.

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Reykjavik?

    Prices for flights from Lambert-St Louis Airport to Reykjavik were last updated today.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to Reykjavik?

  • How old do you have to be to fly from Lambert-St Louis Airport to Reykjavik?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Lambert-St Louis Airport to Reykjavik.

  • What documentation or ID do you need to fly to Reykjavik?

    The necessary travel and health documents for your Reykjavik trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from St. Louis to Reykjavik?

Best airlines flying from St. Louis to Reykjavik

Compare and see reviews for airlines that fly from St. Louis to Reykjavik with momondo
Airline
Rating
Free Cancellation
Price
Air CanadaPriceFrom $604Free CancellationRating
7.1
11,238 reviews
Search Air Canada flights
United AirlinesPriceFrom $650Free CancellationRating
7.4
9,875 reviews
Search United Airlines flights
KLMPriceFrom $756Free CancellationRating
7.8
1,530 reviews
Search KLM flights
DeltaPriceFrom $784Free CancellationRating
7.8
8,421 reviews
Search Delta flights

Traveling to a place near Reykjavik?

Book flights to Reykjavik if you plan to visit one of these locations
Selfoss
Hella
Hveragerdi
Borgarnes
Kopavogur

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Reykjavik?

Finding the right flight to Reykjavik from St. Louis is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Reykjavik quick and easy, saving you time and money.

Can I find flights from St. Louis to Reykjavik with flexible booking policies on momondo?

Yes. All flights to Reykjavik from St. Louis on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from St. Louis to Reykjavik?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Reykjavik from St. Louis.

I’m not ready to book a flight from St. Louis to Reykjavik right now. Can momondo alert me if prices change?

If you are not ready to book a flight from St. Louis to Reykjavik now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Reykjavik and let you know when they change.

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Find better results for your trip to Iceland

Fly into one of these airports located in Reykjavik

Airports listed have a maximum distance of 23.0 mi from Reykjavik
Reykjavik Keflavik Intl Airport
Reykjavik Domestic Airport