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Cheap flights from St. Louis to Iceland from $580

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 5/14. 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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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
5:11 pm - 6:05 amSTL-KEF
30h 54m2 stops
Multiple Airlines Logo
4:55 pm - 2:46 pmKEF-STL
27h 51m1 stop
$628Multiple Airlines
Find Deal
Tue, Jan 13 - Tue, Jan 20
Scandinavian Airlines Logo
12:00 pm - 10:40 amSTL-KEF
40h 40m2 stops
Scandinavian Airlines Logo
11:30 am - 11:37 pmKEF-STL
42h 07m2 stops
$751Scandinavian Airlines
Find Deal
Thu, Jan 15 - Thu, Jan 22
Multiple Airlines Logo
2:50 pm - 6:15 amSTL-KEF
33h 25m1 stop
Multiple Airlines Logo
5:00 pm - 1:54 pmKEF-STL
26h 54m1 stop
$753Multiple Airlines
Find Deal
Tue, Feb 3 - Tue, Feb 10
Multiple Airlines Logo
6:29 pm - 4:25 pmSTL-KEF
16h 56m2 stops
Multiple Airlines Logo
5:10 pm - 9:48 pmKEF-STL
33h 38m2 stops
$754Multiple Airlines
Find Deal
Thu, Apr 23 - Tue, Apr 28
United Airlines Logo
6:15 am - 8:30 amSTL-KEF
45h 15m2 stops
United Airlines Logo
11:30 am - 10:44 pmKEF-STL
16h 14m2 stops
$881United Airlines
Find Deal
Wed, May 20 - Sun, May 31
Scandinavian Airlines Logo
12:00 pm - 3:25 pmSTL-KEF
21h 25m2 stops
Scandinavian Airlines Logo
7:35 am - 11:37 pmKEF-STL
22h 02m2 stops
$890Scandinavian Airlines
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Thu, Jan 22 - Mon, Jan 26
Multiple Airlines Logo
7:00 am - 6:00 amSTL-KEF
18h 00m1 stop
Multiple Airlines Logo
7:50 pm - 2:11 pmKEF-STL
23h 21m1 stop
$904Multiple Airlines
Find Deal
Sat, Apr 18 - Wed, Apr 22
Scandinavian Airlines Logo
1:30 pm - 11:50 pmSTL-KEF
29h 20m2 stops
Scandinavian Airlines Logo
10:30 am - 8:49 pmKEF-STL
39h 19m2 stops
$918Scandinavian Airlines
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Sat, Apr 18 - Wed, Apr 22
Lufthansa Logo
6:40 pm - 2:20 pmSTL-KEF
37h 40m2 stops
Lufthansa Logo
3:25 pm - 4:03 pmKEF-STL
30h 38m2 stops
$923Lufthansa
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Fri, Jan 16 - Fri, Jan 23
Multiple Airlines Logo
2:50 pm - 6:15 amSTL-KEF
33h 25m1 stop
Multiple Airlines Logo
7:15 pm - 11:33 pmKEF-STL
34h 18m2 stops
$928Multiple Airlines
Find Deal
Fri, Jan 16 - Fri, Jan 23

Scandinavian Airlines flights from St. Louis to Iceland

Our best Scandinavian Airlines deals on St. Louis to Iceland flight tickets
Scandinavian Airlines
Jan 15
STL12:00 pmLambert-St Louis
40h 40m
2 stops
KEF10:40 amReykjavik Keflavik Intl
Jan 22
KEF11:30 amReykjavik Keflavik Intl
42h 07m
2 stops
STL11:37 pmLambert-St Louis
$751
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
$890
Find similar
Scandinavian Airlines
Apr 18
STL1:30 pmLambert-St Louis
29h 20m
2 stops
KEF11:50 pmReykjavik Keflavik Intl
Apr 22
KEF10:30 amReykjavik Keflavik Intl
39h 19m
2 stops
STL8:49 pmLambert-St Louis
$918
Find similar

British Airways flights from St. Louis to Iceland

Our best British Airways deals on St. Louis to Iceland flight tickets
British Airways
Jan 12
STL11:05 amLambert-St Louis
41h 45m
2 stops
KEF10:50 amReykjavik Keflavik Intl
Jan 19
KEF11:50 amReykjavik Keflavik Intl
39h 25m
2 stops
STL9:15 pmLambert-St Louis
$1,385
Find similar
British Airways
Mar 14
STL2:25 pmLambert-St Louis
21h 40m
2 stops
KEF5:05 pmReykjavik Keflavik Intl
Mar 23
KEF11:50 amReykjavik Keflavik Intl
35h 11m
2 stops
STL6:01 pmLambert-St Louis
$1,389
Find similar
British Airways
Mar 14
STL2:25 pmLambert-St Louis
21h 40m
2 stops
KEF5:05 pmReykjavik Keflavik Intl
Mar 23
KEF11:50 amReykjavik Keflavik Intl
35h 11m
2 stops
STL6:01 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 3, 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

Tue 1/13

5:11 pm-6:05 am

2 stops30h 54m

Reykjavik Keflavik Intl

Tue 1/20

4:55 pm-2:46 pm

1 stop27h 51m

$628

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Thu 1/15

12:00 pm-10:40 am

2 stops40h 40m

Reykjavik Keflavik Intl

Thu 1/22

11:30 am-11:37 pm

2 stops42h 07m

$751

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Tue 2/3

2:50 pm-6:15 am

1 stop33h 25m

Reykjavik Keflavik Intl

Tue 2/10

5:00 pm-1:54 pm

1 stop26h 54m

$753

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Thu 4/23

6:29 pm-4:25 pm

2 stops16h 56m

Reykjavik Keflavik Intl

Tue 4/28

5:10 pm-9:48 pm

2 stops33h 38m

$754

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Wed 5/20

6:15 am-8:30 am

2 stops45h 15m

Reykjavik Keflavik Intl

Sun 5/31

11:30 am-10:44 pm

2 stops16h 14m

$881

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Thu 1/22

12:00 pm-3:25 pm

2 stops21h 25m

Reykjavik Keflavik Intl

Mon 1/26

7:35 am-11:37 pm

2 stops22h 02m

$890

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Sat 4/18

7:00 am-6:00 am

1 stop18h 00m

Reykjavik Keflavik Intl

Wed 4/22

7:50 pm-2:11 pm

1 stop23h 21m

$904

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Sat 4/18

1:30 pm-11:50 pm

2 stops29h 20m

Reykjavik Keflavik Intl

Wed 4/22

10:30 am-8:49 pm

2 stops39h 19m

$918

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Fri 1/16

6:40 pm-2:20 pm

2 stops37h 40m

Reykjavik Keflavik Intl

Fri 1/23

3:25 pm-4:03 pm

2 stops30h 38m

$923

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Fri 1/16

2:50 pm-6:15 am

1 stop33h 25m

Reykjavik Keflavik Intl

Fri 1/23

7:15 pm-11:33 pm

2 stops34h 18m

$928

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

11h 40m

Direct flights

None
The fastest flight from St. Louis to Iceland takes 11h 40m
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
10,497 reviews
Search Air Canada flights
United AirlinesPriceFrom $595Free CancellationRating
7.4
9,063 reviews
Search United Airlines flights
DeltaPriceFrom $636Free CancellationRating
7.9
8,010 reviews
Search Delta flights
KLMPriceFrom $828Free CancellationRating
7.7
1,426 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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