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Cheap flights from St. Louis to Reykjavik from $388

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 9/1. 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
11:15 am - 10:00 am
STL
-
KEF
17h 45m
1 stop
United Airlines Logo
12:00 pm - 4:51 pm
KEF
-
STL
10h 51m
1 stop
$736United Airlines
Wed, Oct 28 - Thu, Nov 5
United Airlines Logo
6:50 pm - 10:00 am
STL
-
KEF
10h 10m
1 stop
United Airlines Logo
12:00 pm - 4:51 pm
KEF
-
STL
10h 51m
1 stop
$736United Airlines
Sun, Oct 25 - Thu, Nov 5
Air Canada Logo
2:40 pm - 8:45 am
STL
-
KEF
13h 05m
1 stop
Air Canada Logo
9:15 am - 6:41 pm
KEF
-
STL
14h 26m
1 stop
$755Air Canada
Mon, Sep 21 - Wed, Oct 7
Air Canada Logo
2:40 pm - 8:45 am
STL
-
KEF
13h 05m
1 stop
Air Canada Logo
9:15 am - 8:00 pm
KEF
-
STL
15h 45m
2 stops
$756Air Canada
Mon, Sep 21 - Wed, Oct 7
Delta Logo
2:25 pm - 9:30 am
STL
-
KEF
14h 05m
2 stops
Delta Logo
11:25 am - 9:09 am
KEF
-
STL
26h 44m
2 stops
$801Delta
Mon, Oct 12 - Wed, Oct 21
Delta Logo
6:00 am - 9:30 am
STL
-
KEF
22h 30m
2 stops
Delta Logo
11:25 am - 11:54 pm
KEF
-
STL
17h 29m
2 stops
$801Delta
Sun, Oct 11 - Wed, Oct 21
Multiple Airlines Logo
12:10 pm - 7:55 am
STL
-
KEF
14h 45m
1 stop
Multiple Airlines Logo
10:00 am - 8:20 pm
KEF
-
STL
15h 20m
1 stop
$801Multiple Airlines
Tue, Sep 22 - Tue, Sep 29
Scandinavian Airlines Logo
5:35 pm - 10:50 am
STL
-
KEF
36h 15m
2 stops
Scandinavian Airlines Logo
11:35 am - 9:59 pm
KEF
-
STL
40h 24m
2 stops
$831Scandinavian Airlines
Mon, Oct 26 - Tue, Nov 3
KLM Logo
7:20 pm - 9:30 am
STL
-
KEF
33h 10m
2 stops
KLM Logo
11:25 am - 4:23 pm
KEF
-
STL
33h 58m
2 stops
$864KLM
Sun, Oct 11 - Mon, Oct 19
KLM Logo
2:10 pm - 7:40 am
STL
-
KEF
12h 30m
1 stop
KLM Logo
9:30 am - 3:10 pm
KEF
-
STL
10h 40m
1 stop
$1,856KLM
Wed, Aug 12 - Sun, Aug 16

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Scandinavian Airlines flights from St. Louis to Reykjavik Keflavik Intl Airport

Our best Scandinavian Airlines deals on St. Louis to Reykjavik Keflavik Intl Airport flight tickets
Scandinavian Airlines
Oct 26
STL5:35 pmLambert-St Louis
36h 15m
2 stops
KEF10:50 amReykjavik Keflavik Intl
Nov 3
KEF11:35 amReykjavik Keflavik Intl
40h 24m
2 stops
STL9:59 pmLambert-St Louis
$831
Scandinavian Airlines
Aug 28
STL12:52 pmLambert-St Louis
22h 28m
2 stops
KEF4:20 pmReykjavik Keflavik Intl
Sep 4
KEF5:50 pmReykjavik Keflavik Intl
34h 41m
2 stops
STL11:31 pmLambert-St Louis
$845
Scandinavian Airlines
Aug 13
STL3:39 pmLambert-St Louis
34h 41m
2 stops
KEF7:20 amReykjavik Keflavik Intl
Aug 22
KEF5:10 pmReykjavik Keflavik Intl
35h 48m
2 stops
STL11:58 pmLambert-St Louis
$1,348

Delta flights from St. Louis to Reykjavik Keflavik Intl Airport

Our best Delta deals on St. Louis to Reykjavik Keflavik Intl Airport flight tickets
Delta
Sep 21
STL3:52 pmLambert-St Louis
10h 08m
1 stop
KEF7:00 amReykjavik Keflavik Intl
Sep 30
KEF9:30 amReykjavik Keflavik Intl
10h 42m
1 stop
STL3:12 pmLambert-St Louis
$809
Delta
Oct 10
STL5:38 pmLambert-St Louis
34h 52m
2 stops
KEF9:30 amReykjavik Keflavik Intl
Oct 21
KEF11:25 amReykjavik Keflavik Intl
17h 29m
2 stops
STL11:54 pmLambert-St Louis
$811
Delta
Sep 21
STL1:55 pmLambert-St Louis
14h 35m
2 stops
KEF9:30 amReykjavik Keflavik Intl
Sep 30
KEF11:25 amReykjavik Keflavik Intl
26h 35m
2 stops
STL9:00 amLambert-St Louis
$814

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Reykjavik Keflavik Intl Airport 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 July 30, 2026.
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

Cheapest round-trip

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Wed 10/28

11:15 am-10:00 am

1 stop17h 45m

Reykjavik Keflavik Intl

Thu 11/5

12:00 pm-4:51 pm

1 stop10h 51m

$736
Quickest round-trip

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Sun 10/25

6:50 pm-10:00 am

1 stop10h 10m

Reykjavik Keflavik Intl

Thu 11/5

12:00 pm-4:51 pm

1 stop10h 51m

$736

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Mon 9/21

2:40 pm-8:45 am

1 stop13h 05m

Reykjavik Keflavik Intl

Wed 10/7

9:15 am-6:41 pm

1 stop14h 26m

$755

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Mon 9/21

2:40 pm-8:45 am

1 stop13h 05m

Reykjavik Keflavik Intl

Wed 10/7

9:15 am-8:00 pm

2 stops15h 45m

$756

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Mon 10/12

2:25 pm-9:30 am

2 stops14h 05m

Reykjavik Keflavik Intl

Wed 10/21

11:25 am-9:09 am

2 stops26h 44m

$801

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Sun 10/11

6:00 am-9:30 am

2 stops22h 30m

Reykjavik Keflavik Intl

Wed 10/21

11:25 am-11:54 pm

2 stops17h 29m

$801

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Tue 9/22

12:10 pm-7:55 am

1 stop14h 45m

Reykjavik Keflavik Intl

Tue 9/29

10:00 am-8:20 pm

1 stop15h 20m

$801

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Mon 10/26

5:35 pm-10:50 am

2 stops36h 15m

Reykjavik Keflavik Intl

Tue 11/3

11:35 am-9:59 pm

2 stops40h 24m

$831

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Sun 10/11

7:20 pm-9:30 am

2 stops33h 10m

Reykjavik Keflavik Intl

Mon 10/19

11:25 am-4:23 pm

2 stops33h 58m

$864

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Wed 8/12

2:10 pm-7:40 am

1 stop12h 30m

Reykjavik Keflavik Intl

Sun 8/16

9:30 am-3:10 pm

1 stop10h 40m

$1,856

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 Keflavik Intl Airport

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

Can stopping save me money on St. Louis to Reykjavik Keflavik Intl Airport flights?

You could potentially save up to 57% on your flight if you consider stops on a St. Louis to Reykjavik Keflavik Intl Airport flight.

When to book flights from St. Louis to Reykjavik Keflavik Intl Airport

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

Cheap St. Louis to Reykjavik Keflavik Intl Airport (STL to KEF) flight deals and tips

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

Fastest flight time

9h 25m

Direct flights

None
The fastest flight from St. Louis to Reykjavik Keflavik Intl Airport takes 9h 25m
There are no direct flights from St. Louis to Reykjavik Keflavik Intl Airport. There are no popular flight routes from St. Louis to Reykjavik Keflavik Intl Airport.
Search flight deals

Frequently asked questions about flying from St. Louis to Reykjavik Keflavik Intl Airport

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

    A flight from Lambert-St Louis to Reykjavik Keflavik Intl will travel around 3192.8 mi. Typically, this will take 9h 25m by plane in normal conditions.

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

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

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

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

    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 Keflavik Intl Airport.

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

    The necessary travel and health documents for your Reykjavik Keflavik Intl Airport 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 Keflavik Intl Airport?

Best airlines flying from St. Louis to Reykjavik Keflavik Intl Airport

Compare and see reviews for airlines that fly from St. Louis to Reykjavik Keflavik Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
Air CanadaPriceFrom $604Free CancellationRating
7.1
11,412 reviews
Search Air Canada flights
KLMPriceFrom $756Free CancellationRating
7.8
1,551 reviews
Search KLM flights
United AirlinesPriceFrom $783Free CancellationRating
7.4
10,051 reviews
Search United Airlines flights
DeltaPriceFrom $784Free CancellationRating
7.8
8,487 reviews
Search Delta flights

Traveling to a place near Reykjavik?

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

Flights from St. Louis to Reykjavik with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

Once all potential St. Louis to Reykjavik flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Of course. momondo tracks the price of St. Louis to Reykjavik flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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