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St. Louis

$339+ 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 10/15. Fares are subject to change and may not be available on all flights or dates of travel.
KEF — STL
Aug 21 — Aug 281
Thu 8/21
Thu 8/28
1 adult, Economy
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Cheap flight deals from Iceland to St. Louis

Keep the following information in mind while searching for Iceland to St. Louis flight deals. Data was last updated August 16, 2025.

Round-trip from

$771
(United Airlines)

One-way from

$339
(Kiwi.com)
From Iceland to Lambert-St Louis
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One-way flight from Iceland to Lambert-St Louis
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Find flight deals from Iceland to St. Louis

Cheapest flights from Iceland to St. Louis
Explore the most affordable flight options available from Iceland to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 16, 2025.

This United Airlines deal was found by Cheapflights users on 8/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/289:30 amKEF - STL
1 stop15h 27mUnited Airlines
Sun 10/53:23 pmSTL - KEF
2 stops35h 52mUnited Airlines
Deal found 8/14$771
This Virgin Atlantic deal was found by Cheapflights users on 8/14. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/2911:25 amKEF - STL
2 stops16h 59mVirgin Atlantic
Mon 10/63:59 pmSTL - KEF
2 stops12h 31mVirgin Atlantic
Deal found 8/14$804
This Delta deal was found by Cheapflights users on 8/14. 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.
Mon 9/298:45 amKEF - STL
1 stop12h 52mDelta
Mon 10/63:59 pmSTL - KEF
2 stops12h 31mDelta
Deal found 8/14$806
This Expedia deal was found by Cheapflights users on 8/14. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/2812:25 amKEF - STL
2 stops20h 19mLufthansa
Mon 10/65:28 pmSTL - KEF
2 stops49h 07mLufthansa
Deal found 8/14$1,045
This Booking.com deal was found by Cheapflights users on 8/14. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/2812:25 amKEF - STL
2 stops20h 19mMultiple Airlines
Mon 10/69:15 amSTL - KEF
1 stop18h 00mMultiple Airlines
Deal found 8/14$1,079
This United Airlines deal was found by Cheapflights users on 8/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/1312:00 pmKEF - STL
1 stop10h 52mUnited Airlines
Wed 9/175:30 pmSTL - KEF
1 stop10h 00mUnited Airlines
Deal found 8/14$3,610

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 August 16, 2025.
Use the filters below to find and compare flights from Iceland to St. Louis that are best for you.

Fly from

Iceland

Fly to

St. Louis

Route

Depart

Return

Price

ReykjavikSt. Louis

KEF - STL

KEFSTL

Reykjavik Keflavik Intl

Sun 9/28

9:30 am-7:57 pm

1 stop15h 27m

Lambert-St Louis

Sun 10/5

3:23 pm-8:15 am

2 stops35h 52m

$771

ReykjavikSt. Louis

KEF - STL

KEFSTL

Reykjavik Keflavik Intl

Mon 9/29

11:25 am-11:24 pm

2 stops16h 59m

Lambert-St Louis

Mon 10/6

3:59 pm-9:30 am

2 stops12h 31m

$804

ReykjavikSt. Louis

KEF - STL

KEFSTL

Reykjavik Keflavik Intl

Mon 9/29

8:45 am-4:37 pm

1 stop12h 52m

Lambert-St Louis

Mon 10/6

3:59 pm-9:30 am

2 stops12h 31m

$806

ReykjavikSt. Louis

KEF - STL

KEFSTL

Reykjavik Keflavik Intl

Sun 9/28

12:25 am-3:44 pm

2 stops20h 19m

Lambert-St Louis

Mon 10/6

5:28 pm-11:35 pm

2 stops49h 07m

$1,045

ReykjavikSt. Louis

KEF - STL

KEFSTL

Reykjavik Keflavik Intl

Sun 9/28

12:25 am-3:44 pm

2 stops20h 19m

Lambert-St Louis

Mon 10/6

9:15 am-8:15 am

1 stop18h 00m

$1,079

ReykjavikSt. Louis

KEF - STL

KEFSTL

Reykjavik Keflavik Intl

Wed 10/15

3:05 pm-10:37 am

2 stops24h 32m

$339

ReykjavikSt. Louis

KEF - STL

KEFSTL

Reykjavik Keflavik Intl

Mon 9/8

3:05 pm-9:06 am

3 stops47h 01m

$346

ReykjavikSt. Louis

KEF - STL

KEFSTL

Reykjavik Keflavik Intl

Mon 9/29

9:35 am-9:06 am

3 stops28h 31m

$395

ReykjavikSt. Louis

KEF - STL

KEFSTL

Reykjavik Keflavik Intl

Mon 9/15

3:05 pm-9:06 am

3 stops47h 01m

$416

ReykjavikSt. Louis

KEF - STL

KEFSTL

Reykjavik Keflavik Intl

Mon 9/29

11:25 am-11:24 pm

2 stops16h 59m

$862

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/14

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.

  • What is the cheapest month to book a flight from Iceland to St. Louis?

    Currently, August is the cheapest month in which you can book a flight from Iceland to St. Louis (average of $311). Flying from Iceland to St. Louis in March is currently the most expensive (average of $356). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near St. Louis?

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

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