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Cheap flights from St. Louis to Iceland from $584

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 Iceland departing on 8/3. 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

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Find the cheapest flights from St. Louis to Iceland

Cheap round-trip flights

Enter your travel dates to find the best prices.
KLM Logo
4:13 pm - 9:30 am
STL
-
KEF
12h 17m
1 stop
KLM Logo
8:45 am - 4:49 pm
KEF
-
STL
13h 04m
1 stop
$775KLM
Sun, Aug 16 - Wed, Aug 26
Multiple Airlines Logo
4:13 pm - 9:30 am
STL
-
KEF
12h 17m
1 stop
Multiple Airlines Logo
8:45 am - 6:02 pm
KEF
-
STL
14h 17m
2 stops
$779Multiple Airlines
Sun, Aug 16 - Wed, Aug 26
KLM Logo
10:45 am - 7:40 am
STL
-
KEF
15h 55m
1 stop
KLM Logo
8:45 am - 8:31 pm
KEF
-
STL
16h 46m
1 stop
$825KLM
Sat, Aug 15 - Wed, Aug 26
Virgin Atlantic Logo
10:45 am - 7:40 am
STL
-
KEF
15h 55m
1 stop
Virgin Atlantic Logo
8:45 am - 8:50 pm
KEF
-
STL
17h 05m
2 stops
$829Virgin Atlantic
Sat, Aug 15 - Wed, Aug 26
Multiple Airlines Logo
8:08 pm - 6:00 am
STL
-
KEF
28h 52m
1 stop
Multiple Airlines Logo
10:45 am - 7:23 pm
KEF
-
STL
13h 38m
1 stop
$830Multiple Airlines
Sat, Jun 13 - Tue, Jun 23
KLM Logo
5:36 pm - 7:40 am
STL
-
KEF
9h 04m
1 stop
KLM Logo
8:45 am - 5:16 pm
KEF
-
STL
13h 31m
1 stop
$855KLM
Tue, May 12 - Wed, May 20
KLM Logo
1:27 pm - 7:00 am
STL
-
KEF
12h 33m
2 stops
KLM Logo
8:45 am - 4:10 pm
KEF
-
STL
12h 25m
2 stops
$859KLM
Tue, May 12 - Wed, May 20
Multiple Airlines Logo
8:21 pm - 6:00 am
STL
-
KEF
28h 39m
2 stops
Multiple Airlines Logo
10:45 am - 7:23 pm
KEF
-
STL
13h 38m
1 stop
$870Multiple Airlines
Sat, Jun 13 - Tue, Jun 23
Multiple Airlines Logo
8:08 pm - 6:00 am
STL
-
KEF
28h 52m
1 stop
Multiple Airlines Logo
10:45 am - 7:23 pm
KEF
-
STL
13h 38m
1 stop
$878Multiple Airlines
Sat, Jul 18 - Sat, Jul 25
Multiple Airlines Logo
8:08 pm - 9:25 am
STL
-
KEF
32h 17m
1 stop
Multiple Airlines Logo
10:45 am - 7:23 pm
KEF
-
STL
13h 38m
1 stop
$905Multiple Airlines
Sat, Jul 18 - Sat, Jul 25

United Airlines flights from St. Louis to Iceland

Our best United Airlines deals on St. Louis to Iceland flight tickets
United Airlines
Aug 15
STL5:32 pmLambert-St Louis
34h 13m
2 stops
KEF8:45 amReykjavik Keflavik Intl
Aug 26
KEF10:00 amReykjavik Keflavik Intl
31h 49m
2 stops
STL12:49 pmLambert-St Louis
$912
United Airlines
Sep 1
STL4:52 pmLambert-St Louis
9h 08m
1 stop
KEF7:00 amReykjavik Keflavik Intl
Sep 9
KEF9:15 amReykjavik Keflavik Intl
35h 23m
2 stops
STL3:38 pmLambert-St Louis
$933
United Airlines
Sep 1
STL6:55 pmLambert-St Louis
8h 55m
1 stop
KEF8:50 amReykjavik Keflavik Intl
Sep 30
KEF9:15 amReykjavik Keflavik Intl
35h 23m
2 stops
STL3:38 pmLambert-St Louis
$934

Air Canada flights from St. Louis to Iceland

Our best Air Canada deals on St. Louis to Iceland flight tickets
Air Canada
Aug 15
STL2:40 pmLambert-St Louis
36h 15m
2 stops
KEF7:55 amReykjavik Keflavik Intl
Aug 26
KEF10:00 amReykjavik Keflavik Intl
15h 07m
1 stop
STL8:07 pmLambert-St Louis
$929
Air Canada
Aug 15
STL2:40 pmLambert-St Louis
36h 15m
2 stops
KEF7:55 amReykjavik Keflavik Intl
Aug 26
KEF10:00 amReykjavik Keflavik Intl
18h 00m
3 stops
STL11:00 pmLambert-St Louis
$942
Air Canada
Sep 2
STL2:40 pmLambert-St Louis
13h 05m
1 stop
KEF8:45 amReykjavik Keflavik Intl
Sep 10
KEF10:00 amReykjavik Keflavik Intl
15h 00m
1 stop
STL8:00 pmLambert-St Louis
$955

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Iceland 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 April 5, 2026.
Use the filters below to find and compare flights from St. Louis to Iceland that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Sun 8/16

4:13 pm-9:30 am

1 stop12h 17m

Reykjavik Keflavik Intl

Wed 8/26

8:45 am-4:49 pm

1 stop13h 04m

$775

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Sun 8/16

4:13 pm-9:30 am

1 stop12h 17m

Reykjavik Keflavik Intl

Wed 8/26

8:45 am-6:02 pm

2 stops14h 17m

$779

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Sat 8/15

10:45 am-7:40 am

1 stop15h 55m

Reykjavik Keflavik Intl

Wed 8/26

8:45 am-8:31 pm

1 stop16h 46m

$825

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Sat 8/15

10:45 am-7:40 am

1 stop15h 55m

Reykjavik Keflavik Intl

Wed 8/26

8:45 am-8:50 pm

2 stops17h 05m

$829

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Sat 6/13

8:08 pm-6:00 am

1 stop28h 52m

Reykjavik Keflavik Intl

Tue 6/23

10:45 am-7:23 pm

1 stop13h 38m

$830
Quickest round-trip

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Tue 5/12

5:36 pm-7:40 am

1 stop9h 04m

Reykjavik Keflavik Intl

Wed 5/20

8:45 am-5:16 pm

1 stop13h 31m

$855

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Tue 5/12

1:27 pm-7:00 am

2 stops12h 33m

Reykjavik Keflavik Intl

Wed 5/20

8:45 am-4:10 pm

2 stops12h 25m

$859

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Sat 6/13

8:21 pm-6:00 am

2 stops28h 39m

Reykjavik Keflavik Intl

Tue 6/23

10:45 am-7:23 pm

1 stop13h 38m

$870

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Sat 7/18

8:08 pm-6:00 am

1 stop28h 52m

Reykjavik Keflavik Intl

Sat 7/25

10:45 am-7:23 pm

1 stop13h 38m

$878

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Sat 7/18

8:08 pm-9:25 am

1 stop32h 17m

Reykjavik Keflavik Intl

Sat 7/25

10:45 am-7:23 pm

1 stop13h 38m

$905

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 14 resultsSorted by cheapest first
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See travel insights to Iceland from

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

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 Iceland?

Air Canada and WestJet are the most popular carriers operating from Lambert-St Louis to Iceland

What airlines fly to Iceland?

United Airlines, Delta and KLM are the top three most popular airlines that fly to Iceland from St. Louis according to our data. United Airlines is the first choice among our users, with 41% of people opting to fly with this airline when traveling to Iceland. Keep in mind that there are 4 different airlines that fly to Iceland on a routine basis, so you have a few additional options to choose from.

Cheap St. Louis to Iceland flight deals and tips

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

Fastest flight time

12h 05m

Direct flights

None
The fastest flight from St. Louis to Iceland takes 12h 05m
There are no direct flights from St. Louis to Iceland. There are no popular flight routes from St. Louis to Iceland.
Search flight deals

Frequently asked questions about flying from St. Louis to Iceland

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

    Prices for flights from Lambert-St Louis Airport to Iceland are refreshed on a daily basis.

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

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Iceland.

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

    The travel and health documents required for your trip to Iceland can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Iceland. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from St. Louis to Iceland

Compare and see reviews for airlines that fly from St. Louis to Iceland with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $592Free CancellationRating
7.4
9,546 reviews
Search United Airlines flights
Air CanadaPriceFrom $604Free CancellationRating
7.1
10,894 reviews
Search Air Canada flights
DeltaPriceFrom $636Free CancellationRating
7.9
8,384 reviews
Search Delta flights
KLMPriceFrom $756Free CancellationRating
7.8
1,488 reviews
Search KLM flights

Why use momondo?

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

Finding the right flight to Iceland 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 Iceland quick and easy, saving you time and money.

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

Flights from St. Louis to Iceland 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 Iceland?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from St. Louis to Iceland.

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

Price alerts on flights to Iceland from St. Louis are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your Iceland trip

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