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Cheap flights from St. Louis to Iceland from $598

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Iceland departing on 4/29. 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
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
6:29 pm - 7:50 am
STL
-
KEF
32h 21m2 stops
Multiple Airlines Logo
8:35 am - 11:24 pm
KEF
-
STL
19h 49m2 stops
$598Multiple Airlines
Wed, Apr 29 - Mon, May 4
Multiple Airlines Logo
6:33 pm - 4:25 pm
STL
-
KEF
16h 52m2 stops
Multiple Airlines Logo
5:10 pm - 11:52 pm
KEF
-
STL
35h 42m2 stops
$605Multiple Airlines
Thu, Apr 2 - Sun, Apr 5
KLM Logo
12:10 pm - 7:00 am
STL
-
KEF
13h 50m1 stop
KLM Logo
11:25 am - 4:40 pm
KEF
-
STL
10h 15m1 stop
$811KLM
Fri, May 15 - Fri, May 22
KLM Logo
3:50 pm - 7:00 am
STL
-
KEF
10h 10m1 stop
KLM Logo
11:25 am - 8:49 pm
KEF
-
STL
14h 24m2 stops
$816KLM
Fri, May 15 - Fri, May 22
Multiple Airlines Logo
8:25 am - 6:35 am
STL
-
KEF
17h 10m1 stop
Multiple Airlines Logo
5:00 pm - 7:45 am
KEF
-
STL
19h 45m1 stop
$841Multiple Airlines
Wed, Mar 11 - Thu, Mar 19
Multiple Airlines Logo
8:25 am - 6:35 am
STL
-
KEF
17h 10m1 stop
Multiple Airlines Logo
5:00 pm - 10:50 am
KEF
-
STL
22h 50m1 stop
$850Multiple Airlines
Wed, Mar 11 - Thu, Mar 19
Multiple Airlines Logo
4:00 pm - 6:25 am
STL
-
KEF
9h 25m1 stop
Multiple Airlines Logo
4:45 pm - 9:30 am
KEF
-
STL
21h 45m1 stop
$869Multiple Airlines
Mon, Apr 13 - Sat, Apr 18
Multiple Airlines Logo
8:25 am - 6:35 am
STL
-
KEF
17h 10m1 stop
Multiple Airlines Logo
5:10 pm - 7:45 am
KEF
-
STL
19h 35m1 stop
$878Multiple Airlines
Wed, Apr 29 - Mon, May 4
Multiple Airlines Logo
11:18 am - 6:15 am
STL
-
KEF
12h 57m1 stop
Multiple Airlines Logo
5:15 pm - 2:46 pm
KEF
-
STL
27h 31m2 stops
$881Multiple Airlines
Fri, Jan 30 - Fri, Feb 6
Multiple Airlines Logo
1:45 pm - 6:35 am
STL
-
KEF
10h 50m1 stop
Multiple Airlines Logo
4:45 pm - 9:35 am
KEF
-
STL
22h 50m1 stop
$884Multiple Airlines
Sat, Jan 31 - Sat, Feb 7

Lufthansa flights from St. Louis to Iceland

Our best Lufthansa deals on St. Louis to Iceland flight tickets
Lufthansa
Apr 1
STL3:30 pmLambert-St Louis
16h 35m
1 stop
KEF1:05 pmReykjavik Keflavik Intl
Apr 4
KEF12:20 amReykjavik Keflavik Intl
18h 05m
1 stop
STL1:25 pmLambert-St Louis
$888
Find similar
Lufthansa
Jan 16
STL6:40 pmLambert-St Louis
37h 40m
2 stops
KEF2:20 pmReykjavik Keflavik Intl
Jan 23
KEF3:25 pmReykjavik Keflavik Intl
32h 18m
2 stops
STL5:43 pmLambert-St Louis
$901
Find similar
Lufthansa
Apr 29
STL3:30 pmLambert-St Louis
16h 35m
1 stop
KEF1:05 pmReykjavik Keflavik Intl
May 3
KEF12:20 amReykjavik Keflavik Intl
25h 44m
2 stops
STL9:04 pmLambert-St Louis
$908
Find similar

KLM flights from St. Louis to Iceland

Our best KLM deals on St. Louis to Iceland flight tickets
KLM
May 15
STL12:10 pmLambert-St Louis
13h 50m
1 stop
KEF7:00 amReykjavik Keflavik Intl
May 22
KEF11:25 amReykjavik Keflavik Intl
10h 15m
1 stop
STL4:40 pmLambert-St Louis
$811
Find similar
KLM
May 15
STL3:50 pmLambert-St Louis
10h 10m
1 stop
KEF7:00 amReykjavik Keflavik Intl
May 22
KEF11:25 amReykjavik Keflavik Intl
14h 24m
2 stops
STL8:49 pmLambert-St Louis
$816
Find similar
KLM
Apr 1
STL10:02 amLambert-St Louis
18h 28m
2 stops
KEF9:30 amReykjavik Keflavik Intl
Apr 5
KEF11:25 amReykjavik Keflavik Intl
17h 17m
2 stops
STL11:42 pmLambert-St Louis
$927
Find similar

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 December 18, 2025.
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 4/29

6:29 pm-7:50 am

2 stops32h 21m

Reykjavik Keflavik Intl

Mon 5/4

8:35 am-11:24 pm

2 stops19h 49m

$598

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Thu 4/2

6:33 pm-4:25 pm

2 stops16h 52m

Reykjavik Keflavik Intl

Sun 4/5

5:10 pm-11:52 pm

2 stops35h 42m

$605

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Fri 5/15

12:10 pm-7:00 am

1 stop13h 50m

Reykjavik Keflavik Intl

Fri 5/22

11:25 am-4:40 pm

1 stop10h 15m

$811

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Fri 5/15

3:50 pm-7:00 am

1 stop10h 10m

Reykjavik Keflavik Intl

Fri 5/22

11:25 am-8:49 pm

2 stops14h 24m

$816

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Wed 3/11

8:25 am-6:35 am

1 stop17h 10m

Reykjavik Keflavik Intl

Thu 3/19

5:00 pm-7:45 am

1 stop19h 45m

$841

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Wed 3/11

8:25 am-6:35 am

1 stop17h 10m

Reykjavik Keflavik Intl

Thu 3/19

5:00 pm-10:50 am

1 stop22h 50m

$850

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Mon 4/13

4:00 pm-6:25 am

1 stop9h 25m

Reykjavik Keflavik Intl

Sat 4/18

4:45 pm-9:30 am

1 stop21h 45m

$869

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Wed 4/29

8:25 am-6:35 am

1 stop17h 10m

Reykjavik Keflavik Intl

Mon 5/4

5:10 pm-7:45 am

1 stop19h 35m

$878

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Fri 1/30

11:18 am-6:15 am

1 stop12h 57m

Reykjavik Keflavik Intl

Fri 2/6

5:15 pm-2:46 pm

2 stops27h 31m

$881

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Sat 1/31

1:45 pm-6:35 am

1 stop10h 50m

Reykjavik Keflavik Intl

Sat 2/7

4:45 pm-9:35 am

1 stop22h 50m

$884

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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 day to depart on your flight to Iceland?

The cheapest day to depart from St. Louis to Iceland is on a Tuesday when prices can be found for as low as $807. Flights from St. Louis to Iceland on a Thursday will generally be more expensive and average around $1,216. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Iceland?

According to our data, the cheapest time of day to fly to Iceland is in the morning. momondo users have found flights departing from St. Louis to Iceland in the morning for as low as $846. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Try not to purchase tickets in the afternoon because they tend to be around $1,040. Of course, these prices can vary depending on the time of year and what airport you fly to.

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

9h 25m

Direct flights

None
The fastest flight from St. Louis to Iceland takes 9h 25m
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
10,534 reviews
Search Air Canada flights
United AirlinesPriceFrom $595Free CancellationRating
7.4
9,095 reviews
Search United Airlines flights
DeltaPriceFrom $636Free CancellationRating
7.9
8,008 reviews
Search Delta flights
KLMPriceFrom $828Free CancellationRating
7.7
1,428 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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