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Cheap flights from Iceland to St. Louis from $397

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 9/2. 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
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
KEF
-
STL
3191 mimulti-stop
Multiple Airlines Logo
STL
-
KEF
3191 mimulti-stop
Multiple Airlines
Multiple Airlines Logo
RKV
-
STL
3211 mimulti-stop
Multiple Airlines Logo
STL
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RKV
3211 mimulti-stop
Multiple Airlines

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 May 15, 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 one-way

ReykjavikSt. Louis

KEF - STL

KEFSTL

Reykjavik Keflavik Intl

Wed 9/2

9:00 am-5:30 pm

3 stops37h 30m

$397

ReykjavikSt. Louis

KEF - STL

KEFSTL

Reykjavik Keflavik Intl

Wed 9/2

9:00 am-5:30 pm

2 stops37h 30m

$401

ReykjavikSt. Louis

KEF - STL

KEFSTL

Reykjavik Keflavik Intl

Wed 8/12

9:00 am-5:37 pm

3 stops37h 37m

$444

ReykjavikSt. Louis

KEF - STL

KEFSTL

Reykjavik Keflavik Intl

Tue 8/11

9:00 am-8:57 am

2 stops28h 57m

$446

ReykjavikSt. Louis

KEF - STL

KEFSTL

Reykjavik Keflavik Intl

Thu 9/3

9:00 am-12:14 am

3 stops44h 14m

$494

ReykjavikSt. Louis

KEF - STL

KEFSTL

Reykjavik Keflavik Intl

Thu 9/3

9:00 am-8:52 am

2 stops52h 52m

$501

ReykjavikSt. Louis

KEF - STL

KEFSTL

Reykjavik Keflavik Intl

Thu 9/17

9:00 am-7:15 pm

2 stops39h 15m

$507

ReykjavikSt. Louis

KEF - STL

KEFSTL

Reykjavik Keflavik Intl

Tue 8/11

9:00 am-11:59 pm

3 stops43h 59m

$511

ReykjavikSt. Louis

KEF - STL

KEFSTL

Reykjavik Keflavik Intl

Thu 9/17

9:00 am-9:40 am

3 stops29h 40m

$520
Quickest one-way

ReykjavikSt. Louis

KEF - STL

KEFSTL

Reykjavik Keflavik Intl

Mon 10/19

5:00 pm-9:40 am

2 stops21h 40m

$544

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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 46% 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

14h 21m

Direct flights

None
The fastest flight from Iceland to St. Louis takes 14h 21m
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
Hermann
Fairview Heights
Maryland Heights
O'Fallon
Florissant
St. Peters
Collinsville
Alton
Wentzville
Fenton
Farmington
Festus
Clayton
Eureka
Litchfield
Edwardsville
Shrewsbury
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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