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Cheap flights from St. Louis to Iceland from $434

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 6/13. 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.
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
$844Multiple Airlines
Mon, May 25 - Wed, Jun 3
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
$881Multiple Airlines
Mon, Jul 13 - Mon, Jul 20
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
$891Multiple Airlines
Mon, Jul 20 - Wed, Jul 29
Delta Logo
11:18 am - 7:40 am
STL
-
KEF
15h 22m
2 stops
Delta Logo
9:30 am - 8:37 pm
KEF
-
STL
16h 07m
2 stops
$969Delta
Mon, Jul 20 - Wed, Jul 29
Air Canada Logo
6:48 pm - 7:55 am
STL
-
KEF
32h 07m
2 stops
Air Canada Logo
9:15 am - 3:46 pm
KEF
-
STL
35h 31m
2 stops
$978Air Canada
Sat, Jul 18 - Tue, Jul 28
United Airlines Logo
7:05 pm - 7:55 am
STL
-
KEF
31h 50m
2 stops
United Airlines Logo
10:00 am - 12:11 pm
KEF
-
STL
31h 11m
2 stops
$983United Airlines
Sat, Jul 4 - Thu, Jul 16
Air Canada Logo
5:33 pm - 8:45 am
STL
-
KEF
34h 12m
2 stops
Air Canada Logo
9:15 am - 6:42 pm
KEF
-
STL
14h 27m
1 stop
$985Air Canada
Sat, Jul 18 - Tue, Jul 28
Air Canada Logo
2:40 pm - 7:55 am
STL
-
KEF
36h 15m
2 stops
Air Canada Logo
10:00 am - 12:11 pm
KEF
-
STL
31h 11m
2 stops
$986Air Canada
Sat, Jul 4 - Thu, Jul 16
United Airlines Logo
6:48 pm - 7:55 am
STL
-
KEF
32h 07m
2 stops
United Airlines Logo
9:15 am - 6:42 pm
KEF
-
STL
14h 27m
1 stop
$991United Airlines
Sat, Jul 4 - Thu, Jul 16
Air Canada Logo
2:40 pm - 7:55 am
STL
-
KEF
36h 15m
2 stops
Air Canada Logo
9:15 am - 6:42 pm
KEF
-
STL
14h 27m
1 stop
$995Air Canada
Sat, Jul 4 - Thu, Jul 16

KLM flights from St. Louis to Iceland

Our best KLM deals on St. Louis to Iceland flight tickets
KLM
Jul 18
STL6:04 pmLambert-St Louis
8h 36m
1 stop
KEF7:40 amReykjavik Keflavik Intl
Jul 28
KEF8:45 amReykjavik Keflavik Intl
13h 34m
1 stop
STL5:19 pmLambert-St Louis
$1,024
KLM
May 12
STL1:27 pmLambert-St Louis
15h 03m
2 stops
KEF9:30 amReykjavik Keflavik Intl
May 20
KEF9:30 amReykjavik Keflavik Intl
12h 16m
1 stop
STL4:46 pmLambert-St Louis
$1,059
KLM
May 14
STL11:25 amLambert-St Louis
15h 15m
1 stop
KEF7:40 amReykjavik Keflavik Intl
May 21
KEF11:25 amReykjavik Keflavik Intl
15h 13m
2 stops
STL9:38 pmLambert-St Louis
$1,199

Delta flights from St. Louis to Iceland

Our best Delta deals on St. Louis to Iceland flight tickets
Delta
Jul 20
STL11:18 amLambert-St Louis
15h 22m
2 stops
KEF7:40 amReykjavik Keflavik Intl
Jul 29
KEF9:30 amReykjavik Keflavik Intl
16h 07m
2 stops
STL8:37 pmLambert-St Louis
$969
Delta
May 12
STL11:25 amLambert-St Louis
15h 15m
1 stop
KEF7:40 amReykjavik Keflavik Intl
May 20
KEF9:30 amReykjavik Keflavik Intl
10h 01m
1 stop
STL2:31 pmLambert-St Louis
$1,324
Delta
May 12
STL10:19 amLambert-St Louis
16h 21m
2 stops
KEF7:40 amReykjavik Keflavik Intl
May 20
KEF11:25 amReykjavik Keflavik Intl
17h 34m
2 stops
STL11:59 pmLambert-St Louis
$1,329

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 May 3, 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

Mon 5/25

8:08 pm-6:00 am

1 stop28h 52m

Reykjavik Keflavik Intl

Wed 6/3

10:45 am-7:23 pm

1 stop13h 38m

$844

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Mon 7/13

8:08 pm-6:00 am

1 stop28h 52m

Reykjavik Keflavik Intl

Mon 7/20

10:45 am-7:23 pm

1 stop13h 38m

$881

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Mon 7/20

8:08 pm-6:00 am

1 stop28h 52m

Reykjavik Keflavik Intl

Wed 7/29

10:45 am-7:23 pm

1 stop13h 38m

$891
Quickest round-trip

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Mon 7/20

11:18 am-7:40 am

2 stops15h 22m

Reykjavik Keflavik Intl

Wed 7/29

9:30 am-8:37 pm

2 stops16h 07m

$969

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Sat 7/18

6:48 pm-7:55 am

2 stops32h 07m

Reykjavik Keflavik Intl

Tue 7/28

9:15 am-3:46 pm

2 stops35h 31m

$978

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Sat 7/4

7:05 pm-7:55 am

2 stops31h 50m

Reykjavik Keflavik Intl

Thu 7/16

10:00 am-12:11 pm

2 stops31h 11m

$983

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Sat 7/18

5:33 pm-8:45 am

2 stops34h 12m

Reykjavik Keflavik Intl

Tue 7/28

9:15 am-6:42 pm

1 stop14h 27m

$985

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Sat 7/4

2:40 pm-7:55 am

2 stops36h 15m

Reykjavik Keflavik Intl

Thu 7/16

10:00 am-12:11 pm

2 stops31h 11m

$986

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Sat 7/4

6:48 pm-7:55 am

2 stops32h 07m

Reykjavik Keflavik Intl

Thu 7/16

9:15 am-6:42 pm

1 stop14h 27m

$991

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Sat 7/4

2:40 pm-7:55 am

2 stops36h 15m

Reykjavik Keflavik Intl

Thu 7/16

9:15 am-6:42 pm

1 stop14h 27m

$995

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 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 and Delta 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 40% 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

13h 30m

Direct flights

None
The fastest flight from St. Louis to Iceland takes 13h 30m
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
9,682 reviews
Search United Airlines flights
Air CanadaPriceFrom $604Free CancellationRating
7.1
10,993 reviews
Search Air Canada flights
DeltaPriceFrom $707Free CancellationRating
7.9
8,460 reviews
Search Delta flights
KLMPriceFrom $756Free CancellationRating
7.8
1,509 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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