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Cheap flights from St. Louis to Iceland from $649

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 6/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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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.
Lufthansa Logo
3:50 pm - 12:50 am
STL
-
KEF
27h 00m
2 stops
Lufthansa Logo
2:05 pm - 2:55 pm
KEF
-
STL
53h 50m
2 stops
$775Lufthansa
Wed, Mar 4 - Wed, Mar 11
Multiple Airlines Logo
5:47 pm - 7:40 am
STL
-
KEF
8h 53m
1 stop
Multiple Airlines Logo
8:50 am - 1:05 pm
KEF
-
STL
9h 15m
1 stop
$815Multiple Airlines
Wed, May 20 - Sun, May 31
Multiple Airlines Logo
10:15 am - 6:20 am
STL
-
KEF
15h 05m
1 stop
Multiple Airlines Logo
11:25 am - 9:14 pm
KEF
-
STL
14h 49m
2 stops
$820Multiple Airlines
Wed, May 20 - Sun, May 31
United Airlines Logo
1:13 pm - 7:55 am
STL
-
KEF
13h 42m
2 stops
United Airlines Logo
9:15 am - 6:27 pm
KEF
-
STL
14h 12m
1 stop
$836United Airlines
Wed, Jul 8 - Thu, Jul 16
United Airlines Logo
8:55 am - 8:45 am
STL
-
KEF
18h 50m
1 stop
United Airlines Logo
9:15 am - 6:27 pm
KEF
-
STL
14h 12m
1 stop
$837United Airlines
Wed, Jul 8 - Thu, Jul 16
United Airlines Logo
1:13 pm - 8:50 am
STL
-
KEF
14h 37m
2 stops
United Airlines Logo
11:30 am - 11:27 pm
KEF
-
STL
16h 57m
2 stops
$844United Airlines
Wed, Jul 8 - Thu, Jul 16
Finnair Logo
11:46 am - 7:50 am
STL
-
KEF
39h 04m
2 stops
Finnair Logo
8:35 am - 10:17 pm
KEF
-
STL
18h 42m
2 stops
$854Finnair
Fri, Apr 3 - Sat, Apr 11
Scandinavian Airlines Logo
1:02 pm - 4:15 pm
STL
-
KEF
22h 13m
2 stops
Scandinavian Airlines Logo
10:30 am - 11:34 pm
KEF
-
STL
42h 04m
2 stops
$878Scandinavian Airlines
Thu, Apr 16 - Mon, Apr 20
Scandinavian Airlines Logo
1:02 pm - 4:15 pm
STL
-
KEF
22h 13m
2 stops
Scandinavian Airlines Logo
10:30 am - 9:19 pm
KEF
-
STL
39h 49m
2 stops
$881Scandinavian Airlines
Thu, Apr 16 - Mon, Apr 20
United Airlines Logo
9:23 am - 8:30 am
STL
-
KEF
18h 07m
1 stop
United Airlines Logo
9:15 am - 4:34 pm
KEF
-
STL
36h 19m
2 stops
$884United Airlines
Mon, Jun 8 - Wed, Jun 17

United Airlines flights from St. Louis to Iceland

Our best United Airlines deals on St. Louis to Iceland flight tickets
United Airlines
Jul 8
STL1:13 pmLambert-St Louis
13h 42m
2 stops
KEF7:55 amReykjavik Keflavik Intl
Jul 16
KEF9:15 amReykjavik Keflavik Intl
14h 12m
1 stop
STL6:27 pmLambert-St Louis
$836
United Airlines
Jul 8
STL8:55 amLambert-St Louis
18h 50m
1 stop
KEF8:45 amReykjavik Keflavik Intl
Jul 16
KEF9:15 amReykjavik Keflavik Intl
14h 12m
1 stop
STL6:27 pmLambert-St Louis
$837
United Airlines
Jul 8
STL1:13 pmLambert-St Louis
14h 37m
2 stops
KEF8:50 amReykjavik Keflavik Intl
Jul 16
KEF11:30 amReykjavik Keflavik Intl
16h 57m
2 stops
STL11:27 pmLambert-St Louis
$844

Air Canada flights from St. Louis to Iceland

Our best Air Canada deals on St. Louis to Iceland flight tickets
Air Canada
Jun 10
STL1:00 pmLambert-St Louis
14h 45m
2 stops
KEF8:45 amReykjavik Keflavik Intl
Jun 17
KEF9:15 amReykjavik Keflavik Intl
35h 31m
2 stops
STL3:46 pmLambert-St Louis
$892
Air Canada
Jul 10
STL12:10 pmLambert-St Louis
14h 45m
1 stop
KEF7:55 amReykjavik Keflavik Intl
Jul 19
KEF10:00 amReykjavik Keflavik Intl
13h 27m
2 stops
STL6:27 pmLambert-St Louis
$961
Air Canada
Jul 18
STL12:10 pmLambert-St Louis
15h 35m
2 stops
KEF8:45 amReykjavik Keflavik Intl
Jul 25
KEF10:00 amReykjavik Keflavik Intl
13h 27m
2 stops
STL6:27 pmLambert-St Louis
$969

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 February 12, 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

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Wed 3/4

3:50 pm-12:50 am

2 stops27h 00m

Reykjavik Keflavik Intl

Wed 3/11

2:05 pm-2:55 pm

2 stops53h 50m

$775

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Wed 5/20

5:47 pm-7:40 am

1 stop8h 53m

Reykjavik Keflavik Intl

Sun 5/31

8:50 am-1:05 pm

1 stop9h 15m

$815

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Wed 5/20

10:15 am-6:20 am

1 stop15h 05m

Reykjavik Keflavik Intl

Sun 5/31

11:25 am-9:14 pm

2 stops14h 49m

$820

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Wed 7/8

1:13 pm-7:55 am

2 stops13h 42m

Reykjavik Keflavik Intl

Thu 7/16

9:15 am-6:27 pm

1 stop14h 12m

$836

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Wed 7/8

8:55 am-8:45 am

1 stop18h 50m

Reykjavik Keflavik Intl

Thu 7/16

9:15 am-6:27 pm

1 stop14h 12m

$837

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Wed 7/8

1:13 pm-8:50 am

2 stops14h 37m

Reykjavik Keflavik Intl

Thu 7/16

11:30 am-11:27 pm

2 stops16h 57m

$844

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Fri 4/3

11:46 am-7:50 am

2 stops39h 04m

Reykjavik Keflavik Intl

Sat 4/11

8:35 am-10:17 pm

2 stops18h 42m

$854

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Thu 4/16

1:02 pm-4:15 pm

2 stops22h 13m

Reykjavik Keflavik Intl

Mon 4/20

10:30 am-11:34 pm

2 stops42h 04m

$878

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Thu 4/16

1:02 pm-4:15 pm

2 stops22h 13m

Reykjavik Keflavik Intl

Mon 4/20

10:30 am-9:19 pm

2 stops39h 49m

$881

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Mon 6/8

9:23 am-8:30 am

1 stop18h 07m

Reykjavik Keflavik Intl

Wed 6/17

9:15 am-4:34 pm

2 stops36h 19m

$884

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 16 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?

WestJet, KLM, and Lufthansa 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 37% 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

8h 53m

Direct flights

None
The fastest flight from St. Louis to Iceland takes 8h 53m
There are no direct flights from St. Louis to Iceland. There are no popular flight routes from St. Louis to Iceland.
Search flight deals

  • 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
Air CanadaPriceFrom $566Free CancellationRating
7.1
10,709 reviews
Search Air Canada flights
United AirlinesPriceFrom $595Free CancellationRating
7.4
9,281 reviews
Search United Airlines flights
DeltaPriceFrom $636Free CancellationRating
7.9
8,183 reviews
Search Delta flights
KLMPriceFrom $828Free CancellationRating
7.7
1,451 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.

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