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Cheap flights from Iceland to St. Louis from $401

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 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

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.
United Airlines Logo
11:00 am - 11:29 pm
KEF
-
STL
17h 29m
2 stops
United Airlines Logo
12:59 pm - 8:30 am
STL
-
KEF
14h 31m
2 stops
$865United Airlines
Sun, Aug 9 - Sun, Aug 16
Air Canada Logo
9:15 am - 11:29 pm
KEF
-
STL
43h 14m
2 stops
Air Canada Logo
12:10 pm - 7:55 am
STL
-
KEF
14h 45m
1 stop
$1,172Air Canada
Mon, Jul 13 - Fri, Jul 17
Air Canada Logo
9:15 am - 3:46 pm
KEF
-
STL
35h 31m
2 stops
Air Canada Logo
1:13 pm - 7:55 am
STL
-
KEF
13h 42m
2 stops
$1,176Air Canada
Mon, Jul 13 - Fri, Jul 17
Multiple Airlines Logo
12:20 am - 1:25 pm
KEF
-
STL
18h 05m
1 stop
Multiple Airlines Logo
12:10 pm - 7:55 am
STL
-
KEF
14h 45m
1 stop
$1,180Multiple Airlines
Sun, Jul 12 - Fri, Jul 17
Multiple Airlines Logo
5:05 pm - 6:42 pm
KEF
-
STL
30h 37m
3 stops
Multiple Airlines Logo
2:40 pm - 7:55 am
STL
-
KEF
12h 15m
2 stops
$1,358Multiple Airlines
Sun, Aug 9 - Sun, Aug 16
Multiple Airlines Logo
6:00 pm - 8:24 pm
KEF
-
STL
31h 24m
3 stops
Multiple Airlines Logo
12:10 pm - 4:15 pm
STL
-
KEF
23h 05m
3 stops
$1,847Multiple Airlines
Sun, Aug 9 - Sun, Aug 16
Air Canada Logo
9:15 am - 8:22 pm
KEF
-
STL
16h 07m
2 stops
Air Canada Logo
7:20 am - 7:55 am
STL
-
KEF
19h 35m
3 stops
$2,097Air Canada
Mon, Jul 13 - Fri, Jul 17

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Air Canada flights from Iceland to St. Louis

Our best Air Canada deals on Iceland to St. Louis flight tickets
Air Canada
Jul 13
KEF9:15 amReykjavik Keflavik Intl
43h 14m
2 stops
STL11:29 pmLambert-St Louis
Jul 17
STL12:10 pmLambert-St Louis
14h 45m
1 stop
KEF7:55 amReykjavik Keflavik Intl
$1,172
Air Canada
Jul 13
KEF9:15 amReykjavik Keflavik Intl
35h 31m
2 stops
STL3:46 pmLambert-St Louis
Jul 17
STL1:13 pmLambert-St Louis
13h 42m
2 stops
KEF7:55 amReykjavik Keflavik Intl
$1,176
Air Canada
Jul 13
KEF9:15 amReykjavik Keflavik Intl
16h 07m
2 stops
STL8:22 pmLambert-St Louis
Jul 17
STL7:20 amLambert-St Louis
19h 35m
3 stops
KEF7:55 amReykjavik Keflavik Intl
$2,097

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 June 27, 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

Cheapest round-trip
Quickest round-trip

ReykjavikSt. Louis

KEF - STL

KEFSTL

Reykjavik Keflavik Intl

Sun 8/9

11:00 am-11:29 pm

2 stops17h 29m

Lambert-St Louis

Sun 8/16

12:59 pm-8:30 am

2 stops14h 31m

$865

ReykjavikSt. Louis

KEF - STL

KEFSTL

Reykjavik Keflavik Intl

Mon 7/13

9:15 am-11:29 pm

2 stops43h 14m

Lambert-St Louis

Fri 7/17

12:10 pm-7:55 am

1 stop14h 45m

$1,172

ReykjavikSt. Louis

KEF - STL

KEFSTL

Reykjavik Keflavik Intl

Mon 7/13

9:15 am-3:46 pm

2 stops35h 31m

Lambert-St Louis

Fri 7/17

1:13 pm-7:55 am

2 stops13h 42m

$1,176

ReykjavikSt. Louis

KEF - STL

KEFSTL

Reykjavik Keflavik Intl

Sun 7/12

12:20 am-1:25 pm

1 stop18h 05m

Lambert-St Louis

Fri 7/17

12:10 pm-7:55 am

1 stop14h 45m

$1,180

ReykjavikSt. Louis

KEF - STL

KEFSTL

Reykjavik Keflavik Intl

Sun 8/9

5:05 pm-6:42 pm

3 stops30h 37m

Lambert-St Louis

Sun 8/16

2:40 pm-7:55 am

2 stops12h 15m

$1,358

ReykjavikSt. Louis

KEF - STL

KEFSTL

Reykjavik Keflavik Intl

Sun 8/9

6:00 pm-8:24 pm

3 stops31h 24m

Lambert-St Louis

Sun 8/16

12:10 pm-4:15 pm

3 stops23h 05m

$1,847

ReykjavikSt. Louis

KEF - STL

KEFSTL

Reykjavik Keflavik Intl

Mon 7/13

9:15 am-8:22 pm

2 stops16h 07m

Lambert-St Louis

Fri 7/17

7:20 am-7:55 am

3 stops19h 35m

$2,097
Cheapest one-way

ReykjavikSt. Louis

KEF - STL

KEFSTL

Reykjavik Keflavik Intl

Thu 9/3

9:00 am-5:22 pm

2 stops37h 22m

$401

ReykjavikSt. Louis

KEF - STL

KEFSTL

Reykjavik Keflavik Intl

Thu 9/3

9:00 am-5:22 pm

3 stops37h 22m

$405

ReykjavikSt. Louis

KEF - STL

KEFSTL

Reykjavik Keflavik Intl

Tue 9/8

9:00 am-9:40 am

2 stops29h 40m

$461

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 17 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 40% 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

17h 44m

Direct flights

None
The fastest flight from Iceland to St. Louis takes 17h 44m
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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Frequently asked questions about flying from Iceland to St. Louis

  • 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
Fairview Heights
Hermann
Maryland Heights
Florissant
O'Fallon
Collinsville
St. Peters
Alton
Wentzville
Farmington
Fenton
Clayton
Festus
Eureka
Litchfield
Edwardsville
Grafton
Shrewsbury

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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