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Cheap flights from St. Louis to Iceland from $584

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 9/3. 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
1 adult, Economy, 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.
Virgin Atlantic Logo
4:41 pm - 9:30 am
STL
-
KEF
11h 49m
2 stops
Virgin Atlantic Logo
11:25 am - 9:19 pm
KEF
-
STL
14h 54m
2 stops
$599Virgin Atlantic
Tue, Apr 28 - Tue, May 5
Multiple Airlines Logo
11:42 am - 9:30 am
STL
-
KEF
16h 48m
2 stops
Multiple Airlines Logo
11:25 am - 3:32 pm
KEF
-
STL
33h 07m
2 stops
$660Multiple Airlines
Sun, Apr 26 - Sun, May 3
KLM Logo
11:22 am - 7:40 am
STL
-
KEF
15h 18m
1 stop
KLM Logo
8:50 am - 5:16 pm
KEF
-
STL
13h 26m
1 stop
$704KLM
Mon, May 11 - Tue, May 19
Multiple Airlines Logo
11:22 am - 7:40 am
STL
-
KEF
15h 18m
1 stop
Multiple Airlines Logo
11:25 am - 5:05 pm
KEF
-
STL
10h 40m
1 stop
$705Multiple Airlines
Tue, May 12 - Wed, May 20
Multiple Airlines Logo
4:20 pm - 9:30 am
STL
-
KEF
12h 10m
1 stop
Multiple Airlines Logo
11:25 am - 9:09 pm
KEF
-
STL
14h 44m
2 stops
$709Multiple Airlines
Tue, May 12 - Wed, May 20
KLM Logo
3:50 pm - 7:40 am
STL
-
KEF
10h 50m
1 stop
KLM Logo
8:50 am - 4:49 pm
KEF
-
STL
12h 59m
1 stop
$725KLM
Sat, Aug 15 - Wed, Aug 26
Delta Logo
6:48 am - 9:30 am
STL
-
KEF
21h 42m
2 stops
Delta Logo
11:25 am - 8:30 am
KEF
-
STL
26h 05m
2 stops
$729Delta
Sat, Apr 25 - Sat, May 2
KLM Logo
6:04 pm - 6:20 am
STL
-
KEF
31h 16m
1 stop
KLM Logo
9:30 am - 2:31 pm
KEF
-
STL
10h 01m
1 stop
$770KLM
Sat, May 9 - Sun, May 17
United Airlines Logo
5:32 pm - 8:45 am
STL
-
KEF
34h 13m
2 stops
United Airlines Logo
10:00 am - 3:38 pm
KEF
-
STL
34h 38m
2 stops
$812United Airlines
Sat, Aug 15 - Wed, Aug 26
KLM Logo
6:04 pm - 6:20 am
STL
-
KEF
31h 16m
1 stop
KLM Logo
11:25 am - 9:29 pm
KEF
-
STL
15h 04m
2 stops
$814KLM
Sat, May 9 - Sun, May 17

KLM flights from St. Louis to Iceland

Our best KLM deals on St. Louis to Iceland flight tickets
KLM
May 11
STL11:22 amLambert-St Louis
15h 18m
1 stop
KEF7:40 amReykjavik Keflavik Intl
May 19
KEF8:50 amReykjavik Keflavik Intl
13h 26m
1 stop
STL5:16 pmLambert-St Louis
$704
KLM
May 12
STL10:15 amLambert-St Louis
15h 05m
1 stop
KEF6:20 amReykjavik Keflavik Intl
May 20
KEF8:50 amReykjavik Keflavik Intl
17h 19m
1 stop
STL9:09 pmLambert-St Louis
$705
KLM
Aug 15
STL3:50 pmLambert-St Louis
10h 50m
1 stop
KEF7:40 amReykjavik Keflavik Intl
Aug 26
KEF8:50 amReykjavik Keflavik Intl
12h 59m
1 stop
STL4:49 pmLambert-St Louis
$725

Delta flights from St. Louis to Iceland

Our best Delta deals on St. Louis to Iceland flight tickets
Delta
Apr 25
STL6:48 amLambert-St Louis
21h 42m
2 stops
KEF9:30 amReykjavik Keflavik Intl
May 2
KEF11:25 amReykjavik Keflavik Intl
26h 05m
2 stops
STL8:30 amLambert-St Louis
$729
Delta
Aug 22
STL6:45 amLambert-St Louis
19h 55m
2 stops
KEF7:40 amReykjavik Keflavik Intl
Aug 29
KEF8:45 amReykjavik Keflavik Intl
19h 52m
2 stops
STL11:37 pmLambert-St Louis
$819

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 March 14, 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

Tue 4/28

4:41 pm-9:30 am

2 stops11h 49m

Reykjavik Keflavik Intl

Tue 5/5

11:25 am-9:19 pm

2 stops14h 54m

$599

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Sun 4/26

11:42 am-9:30 am

2 stops16h 48m

Reykjavik Keflavik Intl

Sun 5/3

11:25 am-3:32 pm

2 stops33h 07m

$660

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Mon 5/11

11:22 am-7:40 am

1 stop15h 18m

Reykjavik Keflavik Intl

Tue 5/19

8:50 am-5:16 pm

1 stop13h 26m

$704

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Tue 5/12

11:22 am-7:40 am

1 stop15h 18m

Reykjavik Keflavik Intl

Wed 5/20

11:25 am-5:05 pm

1 stop10h 40m

$705

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Tue 5/12

4:20 pm-9:30 am

1 stop12h 10m

Reykjavik Keflavik Intl

Wed 5/20

11:25 am-9:09 pm

2 stops14h 44m

$709
Quickest round-trip

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Sat 8/15

3:50 pm-7:40 am

1 stop10h 50m

Reykjavik Keflavik Intl

Wed 8/26

8:50 am-4:49 pm

1 stop12h 59m

$725

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Sat 4/25

6:48 am-9:30 am

2 stops21h 42m

Reykjavik Keflavik Intl

Sat 5/2

11:25 am-8:30 am

2 stops26h 05m

$729

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Sat 5/9

6:04 pm-6:20 am

1 stop31h 16m

Reykjavik Keflavik Intl

Sun 5/17

9:30 am-2:31 pm

1 stop10h 01m

$770

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Sat 8/15

5:32 pm-8:45 am

2 stops34h 13m

Reykjavik Keflavik Intl

Wed 8/26

10:00 am-3:38 pm

2 stops34h 38m

$812

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Sat 5/9

6:04 pm-6:20 am

1 stop31h 16m

Reykjavik Keflavik Intl

Sun 5/17

11:25 am-9:29 pm

2 stops15h 04m

$814

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 11 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?

Air Canada is the most popular carrier 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

11h 49m

Direct flights

None
The fastest flight from St. Louis to Iceland takes 11h 49m
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
United AirlinesPriceFrom $592Free CancellationRating
7.4
9,428 reviews
Search United Airlines flights
Air CanadaPriceFrom $604Free CancellationRating
7.1
10,801 reviews
Search Air Canada flights
DeltaPriceFrom $636Free CancellationRating
7.9
8,294 reviews
Search Delta flights
KLMPriceFrom $756Free CancellationRating
7.8
1,471 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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