HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Iceland

$543+ Cheap flights from St. Louis (STL) to Iceland

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 2/10. Fares are subject to change and may not be available on all flights or dates of travel.
STL — KEF
Nov 20 — Nov 271
Thu 11/20
Thu 11/27
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from St. Louis to Iceland with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from St. Louis to Iceland

Keep the following information in mind while searching for St. Louis to Iceland flight deals. Data was last updated October 21, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$683
(Priceline)

One-way from

$543
(Finnair)

Popular in

March

Cheapest in

January

Average price

$807
Provider with most accurate pricing for Lambert-St Louis-Reykjavik (REK) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lambert-St Louis-Reykjavik (REK) flights.
Search Deals
From Lambert-St Louis to Iceland
Search Deals
One-way flight from Lambert-St Louis to Iceland
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($118 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($36 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

Find flight deals from St. Louis to Iceland

Cheapest flights from St. Louis to Iceland
Explore the most affordable flight options available from St. Louis to Iceland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 21, 2025.

This Finnair deal was found by Cheapflights users on 10/20. 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.
Wed 11/51:20 pmSTL - KEF
2 stops37h 55mMultiple Airlines
Fri 11/1410:00 amKEF - STL
2 stops36h 34mMultiple Airlines
Deal found 10/20$684
This Finnair deal was found by Cheapflights users on 10/21. 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.
Wed 11/121:20 pmSTL - KEF
2 stops37h 55mMultiple Airlines
Tue 11/1810:00 amKEF - STL
2 stops39h 30mMultiple Airlines
Deal found 10/21$692
This KAYAK deal was found by Cheapflights users on 10/19. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/123:50 pmSTL - KEF
2 stops16h 25mLufthansa
Tue 11/183:20 pmKEF - STL
1 stop28h 35mLufthansa
Deal found 10/19$696
This Finnair deal was found by Cheapflights users on 10/19. 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.
Tue 12/3011:41 amSTL - KEF
2 stops39h 34mFinnair
Tue 1/610:00 amKEF - STL
2 stops39h 29mFinnair
Deal found 10/19$719
This Priceline deal was found by Cheapflights users on 10/20. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/41:20 pmSTL - KEF
2 stops37h 55mFinnair
Thu 12/119:45 amKEF - STL
2 stops39h 44mFinnair
Deal found 10/20$802
This Gurufare deal was found by Cheapflights users on 10/20. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/1411:42 amSTL - KEF
2 stops23h 33mFinnair
Sat 11/226:00 pmKEF - STL
2 stops31h 30mFinnair
Deal found 10/20$858
This Kiwi.com deal was found by Cheapflights users on 10/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/43:30 pmSTL - KEF
2 stops20h 50mMultiple Airlines
Thu 12/114:55 pmKEF - STL
1 stop23h 19mMultiple Airlines
Deal found 10/20$964
This Mytrip deal was found by Cheapflights users on 10/20. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/243:30 pmSTL - KEF
2 stops17h 25mLufthansa
Sun 10/263:20 pmKEF - STL
2 stops55h 19mLufthansa
Deal found 10/20$973

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis to Iceland 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 October 21, 2025.
Use the filters below to find and compare flights from St. Louis to Iceland that are best for you.

Fly from

St. Louis

Fly to

Iceland

Route

Depart

Return

Price

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Wed 11/5

1:20 pm-9:15 am

2 stops37h 55m

Reykjavik Keflavik Intl

Fri 11/14

10:00 am-4:34 pm

2 stops36h 34m

$684

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Wed 11/12

1:20 pm-9:15 am

2 stops37h 55m

Reykjavik Keflavik Intl

Tue 11/18

10:00 am-7:30 pm

2 stops39h 30m

$692

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Wed 11/12

3:50 pm-2:15 pm

2 stops16h 25m

Reykjavik Keflavik Intl

Tue 11/18

3:20 pm-1:55 pm

1 stop28h 35m

$696

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Mon 1/12

8:45 am-6:15 am

1 stop15h 30m

Reykjavik Keflavik Intl

Sat 1/17

5:15 pm-7:54 am

1 stop20h 39m

$713

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Tue 12/30

11:41 am-9:15 am

2 stops39h 34m

Reykjavik Keflavik Intl

Tue 1/6

10:00 am-7:29 pm

2 stops39h 29m

$719

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Thu 2/12

9:55 am-2:20 pm

3 stops22h 25m

Reykjavik Keflavik Intl

Tue 2/17

3:20 pm-7:19 pm

2 stops33h 59m

$724

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Mon 1/12

11:51 am-3:25 pm

2 stops21h 34m

Reykjavik Keflavik Intl

Fri 1/16

3:40 pm-11:40 pm

2 stops38h 00m

$738

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Wed 4/1

3:30 pm-12:10 am

2 stops27h 40m

Reykjavik Keflavik Intl

Thu 6/18

1:15 am-1:30 pm

2 stops17h 15m

$746

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Tue 2/10

11:55 am-9:00 am

2 stops39h 05m

$543

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/19

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

Have a flexible travel schedule? Discover the best time to fly to Iceland from St. Louis 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 St. Louis to Iceland
No data available for this route at this time. Please check back soon.

Reviews of airlines servicing Iceland

Get insights into the airlines that provide service to Iceland. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Iceland. Reviews last updated October 21, 2025.
See what other customers who have flown with Delta, KLM, and United Airlines from St. Louis to Iceland have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
7,978 reviews

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Delta
7.9
Good
7,978 reviews
Delta
7.9
Good
7,978 reviews

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
KLM
7.7
Good
1,404 reviews
Delta
7.9
Good
7,978 reviews

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
United Airlines
7.4
Good
8,988 reviews
Delta
7.9
Good
7,978 reviews

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Air Canada
7.1
Good
10,338 reviews
Delta
7.9
Good
7,978 reviews

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Iceland. 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 from for flights from St. Louis to Iceland?

    Lambert-St Louis (STL) is the airport you will fly out of if you book a flight from St. Louis to Iceland. It is only a 12.7 mi journey to Lambert-St Louis (STL) from St. Louis’s city center.

  • How long is the flight from St. Louis to Iceland?

    For as low as $696, Lufthansa can have you in Iceland from St. Louis in 16h 25m. The distance from St. Louis to Iceland is about 3191 mi.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from St. Louis to Iceland 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for St. Louis to Iceland

See prices for flight routes from nearby airports that may be better suited for you.
St. Louis to Frankfurt flights
St. Louis to Heathrow flights
Kansas City to Heathrow flights
Kansas City to Dublin flights
St. Louis to Madrid flights
Kansas City to Charles de Gaulle flights
St. Louis to Gatwick flights
Kansas City to Gatwick flights
Kansas City to Frankfurt flights
St. Louis to Munich flights
Kansas City to Leonardo da Vinci/Fiumicino flights
St. Louis to Dublin flights
St. Louis to Leonardo da Vinci/Fiumicino flights
Kansas City to London City flights
Kansas City to Barcelona-El Prat flights
St. Louis to Istanbul flights
St. Louis to Charles de Gaulle flights
St. Louis to London City flights
Kansas City to Madrid flights
St. Louis to Amsterdam flights
St. Louis to Lisbon flights
Kansas City to Lisbon flights
Kansas City to Orly flights
Kansas City to Vicenza flights
St. Louis to Edinburgh flights
St. Louis to Barcelona-El Prat flights
St. Louis to Sabiha Gokcen flights
Kansas City to Athens flights
St. Louis to Sarajevo flights
Springfield to Heathrow flights
St. Louis to Athens flights
St. Louis to Bruxelles-National flights
Kansas City to Istanbul flights
Kansas City to Malpensa flights
Kansas City to Edinburgh flights
St. Louis to Orly flights
Kansas City to Linate flights
Kansas City to Amsterdam flights
St. Louis to Berlin flights
St. Louis to Malpensa flights
Kansas City to Munich flights
St. Louis to Stansted flights
Kansas City to Duesseldorf Intl flights
Kansas City to Oslo Gardermoen flights
Kansas City to Sabiha Gokcen flights
St. Louis to Linate flights
Kansas City to Berlin flights
St. Louis to Prague flights
Kansas City to Prague flights

Top 4 airlines flying from St. Louis to Iceland

Discover the top 4 airlines that operate flights from St. Louis to Iceland. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated October 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$566Average$672FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$595Average$1,103FlexibilityNo cancel feeOn-time69%
DeltaCheapest$636Average$1,036FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$828Average$1,147FlexibilityNo cancel feeOn-time75%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.