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Cheap flights from St. Louis to Iceland from $475

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 4/20. 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.
Delta Logo
5:00 pm - 9:30 am
STL
-
KEF
35h 30m2 stops
Delta Logo
11:25 am - 8:52 am
KEF
-
STL
26h 27m2 stops
$756Delta
Sat, Mar 28 - Tue, Apr 7
Delta Logo
9:00 am - 9:30 am
STL
-
KEF
19h 30m2 stops
Delta Logo
8:50 am - 1:17 pm
KEF
-
STL
9h 27m1 stop
$785Delta
Sat, May 2 - Tue, May 12
Air France Logo
11:51 am - 9:30 am
STL
-
KEF
16h 39m2 stops
Air France Logo
11:25 am - 4:40 pm
KEF
-
STL
10h 15m1 stop
$786Air France
Fri, May 1 - Tue, May 12
Multiple Airlines Logo
10:16 am - 6:15 am
STL
-
KEF
13h 59m1 stop
Multiple Airlines Logo
5:15 pm - 6:51 am
KEF
-
STL
43h 36m2 stops
$825Multiple Airlines
Mon, Jan 26 - Mon, Feb 2
Delta Logo
1:30 pm - 9:30 am
STL
-
KEF
15h 00m2 stops
Delta Logo
8:50 am - 8:31 pm
KEF
-
STL
16h 41m1 stop
$835Delta
Fri, May 1 - Mon, May 11
KLM Logo
11:51 am - 9:30 am
STL
-
KEF
16h 39m2 stops
KLM Logo
11:25 am - 8:49 pm
KEF
-
STL
14h 24m2 stops
$836KLM
Sat, May 2 - Mon, May 11
Lufthansa Logo
4:50 pm - 12:40 am
STL
-
KEF
26h 50m1 stop
Lufthansa Logo
12:25 am - 9:03 pm
KEF
-
STL
25h 38m2 stops
$848Lufthansa
Fri, Mar 27 - Mon, Apr 6
Multiple Airlines Logo
8:20 pm - 6:35 am
STL
-
KEF
28h 15m1 stop
Multiple Airlines Logo
5:00 pm - 7:00 pm
KEF
-
STL
32h 00m1 stop
$858Multiple Airlines
Tue, Jan 27 - Tue, Feb 3
Multiple Airlines Logo
8:25 am - 6:35 am
STL
-
KEF
17h 10m1 stop
Multiple Airlines Logo
4:45 pm - 9:35 am
KEF
-
STL
21h 50m1 stop
$863Multiple Airlines
Wed, Mar 11 - Wed, Mar 18
Multiple Airlines Logo
12:20 pm - 6:30 am
STL
-
KEF
13h 10m1 stop
Multiple Airlines Logo
5:00 pm - 7:45 am
KEF
-
STL
19h 45m1 stop
$866Multiple Airlines
Wed, Mar 11 - Wed, Mar 18

Scandinavian Airlines flights from St. Louis to Iceland

Our best Scandinavian Airlines deals on St. Louis to Iceland flight tickets
Scandinavian Airlines
Jan 26
STL3:45 pmLambert-St Louis
37h 00m
2 stops
KEF10:45 amReykjavik Keflavik Intl
Feb 2
KEF7:35 amReykjavik Keflavik Intl
22h 02m
2 stops
STL11:37 pmLambert-St Louis
$884
Find similar
Scandinavian Airlines
Jan 22
STL12:00 pmLambert-St Louis
40h 40m
2 stops
KEF10:40 amReykjavik Keflavik Intl
Jan 26
KEF7:35 amReykjavik Keflavik Intl
22h 02m
2 stops
STL11:37 pmLambert-St Louis
$995
Find similar
Scandinavian Airlines
Jan 22
STL12:00 pmLambert-St Louis
21h 25m
2 stops
KEF3:25 pmReykjavik Keflavik Intl
Jan 26
KEF7:35 amReykjavik Keflavik Intl
22h 02m
2 stops
STL11:37 pmLambert-St Louis
$996
Find similar

British Airways flights from St. Louis to Iceland

Our best British Airways deals on St. Louis to Iceland flight tickets
British Airways
Mar 14
STL6:33 pmLambert-St Louis
17h 32m
2 stops
KEF5:05 pmReykjavik Keflavik Intl
Mar 23
KEF11:50 amReykjavik Keflavik Intl
35h 11m
2 stops
STL6:01 pmLambert-St Louis
$1,386
Find similar
British Airways
Jan 12
STL6:44 pmLambert-St Louis
34h 06m
2 stops
KEF10:50 amReykjavik Keflavik Intl
Jan 19
KEF11:50 amReykjavik Keflavik Intl
39h 25m
2 stops
STL9:15 pmLambert-St Louis
$1,390
Find similar
British Airways
Jan 27
STL3:20 pmLambert-St Louis
37h 25m
2 stops
KEF10:45 amReykjavik Keflavik Intl
Feb 3
KEF11:50 amReykjavik Keflavik Intl
36h 24m
2 stops
STL6:14 pmLambert-St Louis
$1,391
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 14, 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

Sat 3/28

5:00 pm-9:30 am

2 stops35h 30m

Reykjavik Keflavik Intl

Tue 4/7

11:25 am-8:52 am

2 stops26h 27m

$756

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Sat 5/2

9:00 am-9:30 am

2 stops19h 30m

Reykjavik Keflavik Intl

Tue 5/12

8:50 am-1:17 pm

1 stop9h 27m

$785

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Fri 5/1

11:51 am-9:30 am

2 stops16h 39m

Reykjavik Keflavik Intl

Tue 5/12

11:25 am-4:40 pm

1 stop10h 15m

$786

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Mon 1/26

10:16 am-6:15 am

1 stop13h 59m

Reykjavik Keflavik Intl

Mon 2/2

5:15 pm-6:51 am

2 stops43h 36m

$825

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Fri 5/1

1:30 pm-9:30 am

2 stops15h 00m

Reykjavik Keflavik Intl

Mon 5/11

8:50 am-8:31 pm

1 stop16h 41m

$835

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Sat 5/2

11:51 am-9:30 am

2 stops16h 39m

Reykjavik Keflavik Intl

Mon 5/11

11:25 am-8:49 pm

2 stops14h 24m

$836

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Fri 3/27

4:50 pm-12:40 am

1 stop26h 50m

Reykjavik Keflavik Intl

Mon 4/6

12:25 am-9:03 pm

2 stops25h 38m

$848

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Tue 1/27

8:20 pm-6:35 am

1 stop28h 15m

Reykjavik Keflavik Intl

Tue 2/3

5:00 pm-7:00 pm

1 stop32h 00m

$858

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Wed 3/11

8:25 am-6:35 am

1 stop17h 10m

Reykjavik Keflavik Intl

Wed 3/18

4:45 pm-9:35 am

1 stop21h 50m

$863

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Wed 3/11

12:20 pm-6:30 am

1 stop13h 10m

Reykjavik Keflavik Intl

Wed 3/18

5:00 pm-7:45 am

1 stop19h 45m

$866

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 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 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
10,522 reviews
Search Air Canada flights
United AirlinesPriceFrom $595Free CancellationRating
7.4
9,093 reviews
Search United Airlines flights
DeltaPriceFrom $636Free CancellationRating
7.9
8,006 reviews
Search Delta flights
KLMPriceFrom $828Free CancellationRating
7.7
1,430 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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