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St. Louis

$672+ Cheap flights from Iceland to St. Louis (STL)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/22. Fares are subject to change and may not be available on all flights or dates of travel.
KEF — STL
apr 18 — apr 251
lör 4/18
lör 4/25
1 adult, Economy
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Cheap flight deals from Iceland to St. Louis

One-way flights from Iceland to St. Louis
Search for one-way flight options from Iceland to St. Louis. Find affordable one-way fares based on user searches. Data last updated mars 19, 2026.

This Finnair deal was found by Cheapflights users on 3/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
fre 5/228:35 am
KEF
-
STL
2 stops20h 19m
Multiple Airlines
Deal found 3/17$672
This Finnair deal was found by Cheapflights users on 3/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
fre 5/228:35 am
KEF
-
STL
2 stops20h 19m
Finnair
Deal found 3/16$676
This British Airways deal was found by Cheapflights users on 3/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
fre 5/228:35 am
KEF
-
STL
2 stops20h 19m
British Airways
Deal found 3/18$677
This BusinessClass deal was found by Cheapflights users on 3/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sön 8/308:20 am
KEF
-
STL
2 stops19h 41m
WestJet
Deal found 3/17$745
This Finnair deal was found by Cheapflights users on 3/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sön 8/308:35 am
KEF
-
STL
2 stops20h 16m
Finnair
Deal found 3/18$776
This Alaska Airlines deal was found by Cheapflights users on 3/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sön 8/3012:45 pm
KEF
-
STL
1 stop30h 41m
Alaska Airlines
Deal found 3/18$854
This Delta deal was found by Cheapflights users on 3/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
fre 5/228:45 am
KEF
-
STL
1 stop9h 25m
Delta
Deal found 3/16$1,010
This KLM deal was found by Cheapflights users on 3/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
fre 5/228:50 am
KEF
-
STL
1 stop13h 26m
KLM
Deal found 3/17$1,013

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated mars 19, 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

fre 5/22

8:35 am-11:54 pm

2 stops20h 19m

$676

ReykjavikSt. Louis

KEF - STL

KEFSTL

Reykjavik Keflavik Intl

fre 5/22

8:35 am-11:54 pm

2 stops20h 19m

$679

ReykjavikSt. Louis

KEF - STL

KEFSTL

Reykjavik Keflavik Intl

sön 8/30

8:20 am-11:01 pm

2 stops19h 41m

$745

ReykjavikSt. Louis

KEF - STL

KEFSTL

Reykjavik Keflavik Intl

sön 8/30

8:35 am-11:51 pm

2 stops20h 16m

$776

ReykjavikSt. Louis

KEF - STL

KEFSTL

Reykjavik Keflavik Intl

sön 8/30

12:45 pm-2:26 pm

1 stop30h 41m

$854

ReykjavikSt. Louis

KEF - STL

KEFSTL

Reykjavik Keflavik Intl

fre 5/22

8:45 am-5:16 pm

1 stop13h 31m

$1,010
Quickest one-way

ReykjavikSt. Louis

KEF - STL

KEFSTL

Reykjavik Keflavik Intl

fre 5/22

8:50 am-5:16 pm

1 stop13h 26m

$1,013

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/16

Sorted by cheapest first

Best time to book a flight from Iceland to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Iceland with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Iceland to St. Louis
No data available for this route at this time. Please check back soon.

Related info for your journey

Find useful and relevant information for your journey from Iceland to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to St. Louis from Iceland?

    Lambert-St Louis (STL), located 12.7 mi from the city center, is the airport you fly into when you book flights from Iceland to St. Louis.

  • Can I find deals for flights from Iceland to St. Louis that include hotel bookings?

    Yes. In addition to deals on Iceland to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Iceland to St. Louis?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Iceland to St. Louis.

  • Can I find deals for business class flights from Iceland to St. Louis?

    Yes. Cheapflights offers flight deals from Iceland to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Edwardsville
O'Fallon
Fenton
Swansea
Fairview Heights
Maryland Heights
Collinsville
Eureka
Wentzville
Glencoe
Chesterfield
Alton
Farmington
Festus

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