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Cheap flights from St. Louis to Iceland from $391

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 7/30. 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

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from St. Louis to Iceland

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
3:11 pm - 8:50 am
STL
-
KEF
12h 39m
1 stop
United Airlines Logo
9:15 am - 3:43 pm
KEF
-
STL
35h 28m
2 stops
$771United Airlines
Wed, Oct 7 - Wed, Oct 14
Air Canada Logo
12:10 pm - 7:55 am
STL
-
KEF
14h 45m
1 stop
Air Canada Logo
10:00 am - 2:17 pm
KEF
-
STL
33h 17m
2 stops
$774Air Canada
Tue, Sep 29 - Tue, Oct 6
United Airlines Logo
8:35 am - 8:50 am
STL
-
KEF
19h 15m
2 stops
United Airlines Logo
9:15 am - 12:13 pm
KEF
-
STL
31h 58m
2 stops
$775United Airlines
Wed, Oct 7 - Wed, Oct 14
United Airlines Logo
12:20 pm - 7:55 am
STL
-
KEF
14h 35m
2 stops
United Airlines Logo
10:00 am - 12:13 pm
KEF
-
STL
31h 13m
2 stops
$779United Airlines
Tue, Sep 29 - Tue, Oct 6
United Airlines Logo
7:00 am - 7:00 am
STL
-
KEF
19h 00m
1 stop
United Airlines Logo
9:15 am - 3:43 pm
KEF
-
STL
35h 28m
2 stops
$784United Airlines
Mon, Sep 21 - Wed, Sep 30
Air Canada Logo
12:10 pm - 7:55 am
STL
-
KEF
14h 45m
1 stop
Air Canada Logo
10:00 am - 8:00 pm
KEF
-
STL
15h 00m
1 stop
$787Air Canada
Tue, Sep 29 - Tue, Oct 6
United Airlines Logo
6:15 am - 7:00 am
STL
-
KEF
19h 45m
2 stops
United Airlines Logo
9:15 am - 12:13 pm
KEF
-
STL
31h 58m
2 stops
$788United Airlines
Mon, Sep 21 - Wed, Sep 30
Air Canada Logo
2:40 pm - 7:55 am
STL
-
KEF
36h 15m
2 stops
Air Canada Logo
9:15 am - 10:59 pm
KEF
-
STL
42h 44m
2 stops
$790Air Canada
Mon, Sep 21 - Wed, Sep 30
Multiple Airlines Logo
2:40 pm - 8:45 am
STL
-
KEF
13h 05m
1 stop
Multiple Airlines Logo
10:00 am - 8:00 pm
KEF
-
STL
15h 00m
1 stop
$792Multiple Airlines
Mon, Oct 5 - Tue, Oct 13
United Airlines Logo
8:50 am - 8:50 am
STL
-
KEF
19h 00m
1 stop
United Airlines Logo
9:15 am - 6:41 pm
KEF
-
STL
14h 26m
1 stop
$797United Airlines
Mon, Sep 21 - Wed, Sep 30

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United Airlines flights from St. Louis to Iceland

Our best United Airlines deals on St. Louis to Iceland flight tickets
United Airlines
Oct 7
STL3:11 pmLambert-St Louis
12h 39m
1 stop
KEF8:50 amReykjavik Keflavik Intl
Oct 14
KEF9:15 amReykjavik Keflavik Intl
35h 28m
2 stops
STL3:43 pmLambert-St Louis
$771
United Airlines
Oct 7
STL8:35 amLambert-St Louis
19h 15m
2 stops
KEF8:50 amReykjavik Keflavik Intl
Oct 14
KEF9:15 amReykjavik Keflavik Intl
31h 58m
2 stops
STL12:13 pmLambert-St Louis
$775
United Airlines
Sep 29
STL7:30 amLambert-St Louis
19h 25m
3 stops
KEF7:55 amReykjavik Keflavik Intl
Oct 6
KEF10:00 amReykjavik Keflavik Intl
31h 13m
2 stops
STL12:13 pmLambert-St Louis
$779

Lufthansa flights from St. Louis to Iceland

Our best Lufthansa deals on St. Louis to Iceland flight tickets
Lufthansa
Nov 3
STL5:55 pmLambert-St Louis
34h 05m
2 stops
KEF10:00 amReykjavik Keflavik Intl
Nov 10
KEF3:20 pmReykjavik Keflavik Intl
28h 25m
1 stop
STL1:45 pmLambert-St Louis
$871
Lufthansa
Jul 3
STL3:30 pmLambert-St Louis
27h 40m
2 stops
KEF12:10 amReykjavik Keflavik Intl
Jul 10
KEF12:25 amReykjavik Keflavik Intl
24h 01m
2 stops
STL7:26 pmLambert-St Louis
$1,389
Lufthansa
Jul 3
STL3:30 pmLambert-St Louis
27h 40m
2 stops
KEF12:10 amReykjavik Keflavik Intl
Jul 10
KEF12:25 amReykjavik Keflavik Intl
24h 01m
2 stops
STL7:26 pmLambert-St Louis
$1,405

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 June 30, 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

Wed 10/7

3:11 pm-8:50 am

1 stop12h 39m

Reykjavik Keflavik Intl

Wed 10/14

9:15 am-3:43 pm

2 stops35h 28m

$771

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Tue 9/29

12:10 pm-7:55 am

1 stop14h 45m

Reykjavik Keflavik Intl

Tue 10/6

10:00 am-2:17 pm

2 stops33h 17m

$774

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Wed 10/7

8:35 am-8:50 am

2 stops19h 15m

Reykjavik Keflavik Intl

Wed 10/14

9:15 am-12:13 pm

2 stops31h 58m

$775

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Tue 9/29

12:20 pm-7:55 am

2 stops14h 35m

Reykjavik Keflavik Intl

Tue 10/6

10:00 am-12:13 pm

2 stops31h 13m

$779

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Mon 9/21

7:00 am-7:00 am

1 stop19h 00m

Reykjavik Keflavik Intl

Wed 9/30

9:15 am-3:43 pm

2 stops35h 28m

$784

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Tue 9/29

12:10 pm-7:55 am

1 stop14h 45m

Reykjavik Keflavik Intl

Tue 10/6

10:00 am-8:00 pm

1 stop15h 00m

$787

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Mon 9/21

6:15 am-7:00 am

2 stops19h 45m

Reykjavik Keflavik Intl

Wed 9/30

9:15 am-12:13 pm

2 stops31h 58m

$788

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Mon 9/21

2:40 pm-7:55 am

2 stops36h 15m

Reykjavik Keflavik Intl

Wed 9/30

9:15 am-10:59 pm

2 stops42h 44m

$790
Quickest round-trip

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Mon 10/5

2:40 pm-8:45 am

1 stop13h 05m

Reykjavik Keflavik Intl

Tue 10/13

10:00 am-8:00 pm

1 stop15h 00m

$792

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Mon 9/21

8:50 am-8:50 am

1 stop19h 00m

Reykjavik Keflavik Intl

Wed 9/30

9:15 am-6:41 pm

1 stop14h 26m

$797

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

Can stopping save me money on St. Louis to Iceland flights?

You could potentially save up to 57% on your flight if you consider stops on a St. Louis to Iceland flight.

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

8h 55m

Direct flights

None
The fastest flight from St. Louis to Iceland takes 8h 55m
There are no direct flights from St. Louis to Iceland. There are no popular flight routes from St. Louis to Iceland.
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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
Air CanadaPriceFrom $604Free CancellationRating
7.1
11,277 reviews
Search Air Canada flights
KLMPriceFrom $756Free CancellationRating
7.8
1,531 reviews
Search KLM flights
United AirlinesPriceFrom $783Free CancellationRating
7.4
9,906 reviews
Search United Airlines flights
DeltaPriceFrom $784Free CancellationRating
7.8
8,451 reviews
Search Delta 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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