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Cheap flights from Iceland to St. Louis from $622

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Iceland to St. Louis departing on 5/22. 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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0 bags

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Find the cheapest flights from Iceland to St. Louis

Recent round-trip flight deals from Iceland to St. Louis

Enter your travel dates to find the best prices.
Multiple Airlines Logo
12:10 am - 11:57 pm
KEF
-
STL
28h 47m
2 stops
Multiple Airlines Logo
3:30 pm - 1:05 pm
STL
-
KEF
16h 35m
1 stop
$879Multiple Airlines
Tue, Apr 14 - Wed, Apr 22
Delta Logo
11:25 am - 11:14 pm
KEF
-
STL
16h 49m
2 stops
Delta Logo
10:50 am - 9:30 am
STL
-
KEF
17h 40m
2 stops
$949Delta
Wed, Apr 15 - Wed, Apr 22
Lufthansa Logo
12:20 am - 1:25 pm
KEF
-
STL
18h 05m
1 stop
Lufthansa Logo
3:30 pm - 11:25 pm
STL
-
KEF
26h 55m
1 stop
$1,022Lufthansa
Sat, Apr 11 - Sun, Apr 19
Finnair Logo
5:15 pm - 10:17 pm
KEF
-
STL
34h 02m
2 stops
Finnair Logo
5:21 pm - 7:50 am
STL
-
KEF
33h 29m
2 stops
$1,035Finnair
Sun, Apr 12 - Sun, Apr 19
Multiple Airlines Logo
4:50 pm - 9:48 am
KEF
-
STL
21h 58m
1 stop
Multiple Airlines Logo
4:59 pm - 6:05 am
STL
-
KEF
56h 06m
2 stops
$1,168Multiple Airlines
Sun, Apr 12 - Sun, Apr 19
Multiple Airlines Logo
4:50 pm - 7:21 pm
KEF
-
STL
31h 31m
1 stop
Multiple Airlines Logo
7:00 am - 9:25 am
STL
-
KEF
21h 25m
1 stop
$1,288Multiple Airlines
Wed, Apr 15 - Wed, Apr 22
Multiple Airlines Logo
5:05 pm - 12:05 pm
KEF
-
STL
24h 00m
2 stops
Multiple Airlines Logo
4:05 pm - 11:50 pm
STL
-
KEF
26h 45m
3 stops
$1,453Multiple Airlines
Sun, Apr 12 - Sun, Apr 19
Multiple Airlines Logo
11:55 am - 9:11 pm
KEF
-
STL
38h 16m
2 stops
Multiple Airlines Logo
11:46 am - 7:50 am
STL
-
KEF
39h 04m
2 stops
$1,457Multiple Airlines
Sat, Mar 28 - Sat, Apr 4
Multiple Airlines Logo
8:05 pm - 7:02 am
KEF
-
STL
39h 57m
2 stops
Multiple Airlines Logo
8:41 am - 9:25 am
STL
-
KEF
19h 44m
1 stop
$1,628Multiple Airlines
Sat, Mar 28 - Sat, Apr 4
Multiple Airlines Logo
10:40 am - 3:25 pm
KEF
-
STL
33h 45m
3 stops
Multiple Airlines Logo
4:05 pm - 11:50 pm
STL
-
KEF
26h 45m
3 stops
$1,701Multiple Airlines
Sun, Apr 12 - Sun, Apr 19

momondo Fare Finder

 
Customize your flight search to find flights from Iceland to St. Louis 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 2, 2026.
Use the filters below to find and compare flights from Iceland to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

ReykjavikSt. Louis

KEF - STL

KEFSTL

Reykjavik Keflavik Intl

Tue 4/14

12:10 am-11:57 pm

2 stops28h 47m

Lambert-St Louis

Wed 4/22

3:30 pm-1:05 pm

1 stop16h 35m

$879

ReykjavikSt. Louis

KEF - STL

KEFSTL

Reykjavik Keflavik Intl

Wed 4/15

11:25 am-11:14 pm

2 stops16h 49m

Lambert-St Louis

Wed 4/22

10:50 am-9:30 am

2 stops17h 40m

$949

ReykjavikSt. Louis

KEF - STL

KEFSTL

Reykjavik Keflavik Intl

Sat 4/11

12:20 am-1:25 pm

1 stop18h 05m

Lambert-St Louis

Sun 4/19

3:30 pm-11:25 pm

1 stop26h 55m

$1,022

ReykjavikSt. Louis

KEF - STL

KEFSTL

Reykjavik Keflavik Intl

Sun 4/12

5:15 pm-10:17 pm

2 stops34h 02m

Lambert-St Louis

Sun 4/19

5:21 pm-7:50 am

2 stops33h 29m

$1,035

ReykjavikSt. Louis

KEF - STL

KEFSTL

Reykjavik Keflavik Intl

Sun 4/12

4:50 pm-9:48 am

1 stop21h 58m

Lambert-St Louis

Sun 4/19

4:59 pm-6:05 am

2 stops56h 06m

$1,168

ReykjavikSt. Louis

KEF - STL

KEFSTL

Reykjavik Keflavik Intl

Wed 4/15

4:50 pm-7:21 pm

1 stop31h 31m

Lambert-St Louis

Wed 4/22

7:00 am-9:25 am

1 stop21h 25m

$1,288

ReykjavikSt. Louis

KEF - STL

KEFSTL

Reykjavik Keflavik Intl

Sun 4/12

5:05 pm-12:05 pm

2 stops24h 00m

Lambert-St Louis

Sun 4/19

4:05 pm-11:50 pm

3 stops26h 45m

$1,453

ReykjavikSt. Louis

KEF - STL

KEFSTL

Reykjavik Keflavik Intl

Sat 3/28

11:55 am-9:11 pm

2 stops38h 16m

Lambert-St Louis

Sat 4/4

11:46 am-7:50 am

2 stops39h 04m

$1,457

ReykjavikSt. Louis

KEF - STL

KEFSTL

Reykjavik Keflavik Intl

Sat 3/28

8:05 pm-7:02 am

2 stops39h 57m

Lambert-St Louis

Sat 4/4

8:41 am-9:25 am

1 stop19h 44m

$1,628

ReykjavikSt. Louis

KEF - STL

KEFSTL

Reykjavik Keflavik Intl

Sun 4/12

10:40 am-3:25 pm

3 stops33h 45m

Lambert-St Louis

Sun 4/19

4:05 pm-11:50 pm

3 stops26h 45m

$1,701

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 St. Louis from

How to get the cheapest flight ticket from Iceland to St. Louis

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 Iceland to St. Louis flights?

You could potentially save up to 34% on your flight if you consider stops on a Iceland to St. Louis flight.

Cheap Iceland to St. Louis flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Iceland to St. Louis

Fastest flight time

34h 02m

Direct flights

None
The fastest flight from Iceland to St. Louis takes 34h 02m
There are no direct flights from Iceland to St. Louis. There are no popular flight routes from Iceland to St. Louis.
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  • When did momondo last update prices for flights from Iceland to Lambert-St Louis Airport?

    Prices for flights from Iceland to Lambert-St Louis Airport refresh daily.

  • How old do you have to be to fly from Iceland to Lambert-St Louis Airport?

    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 Iceland to Lambert-St Louis Airport.

  • What documentation or ID do you need to fly to Lambert-St Louis Airport?

    The necessary travel and health documents for your Lambert-St Louis Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles
Chesterfield
Hermann
Fairview Heights
Florissant
Maryland Heights
O'Fallon
St. Peters
Wentzville
Collinsville
Alton
Fenton
Farmington
Edwardsville
Festus
Clayton
Eureka
Litchfield
Glencoe
Grafton

Why use momondo?

Why should I use momondo to find a flight deal from Iceland to St. Louis?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Iceland to St. Louis. momondo saves you time and could save you money on your trip.

Can I find flights from Iceland to St. Louis with flexible booking policies on momondo?

momondo does allow users to show only those flights to St. Louis from Iceland which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Iceland to St. Louis?

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 Iceland to St. Louis.

I’m not ready to book a flight from Iceland to St. Louis right now. Can momondo alert me if prices change?

Price alerts on flights to St. Louis from Iceland 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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