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Cheap flights from St. Louis to Iceland from $715

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Iceland departing on 5/5. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from St. Louis to Iceland

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
5:18 pm - 11:30 pmSTL-KEF
25h 12m2 stops
Multiple Airlines Logo
12:25 am - 6:25 pmKEF-STL
23h 00m2 stops
$715Multiple Airlines
Find Deal
Tue, May 5 - Mon, May 11
Multiple Airlines Logo
4:00 pm - 9:30 amSTL-KEF
12h 30m2 stops
Multiple Airlines Logo
11:25 am - 4:40 pmKEF-STL
10h 15m1 stop
$735Multiple Airlines
Find Deal
Mon, May 4 - Tue, May 12
Lufthansa Logo
5:18 pm - 11:30 pmSTL-KEF
25h 12m2 stops
Lufthansa Logo
2:20 pm - 1:30 pmKEF-STL
28h 10m1 stop
$736Lufthansa
Find Deal
Tue, May 5 - Tue, May 12
Multiple Airlines Logo
5:18 pm - 11:30 pmSTL-KEF
25h 12m2 stops
Multiple Airlines Logo
2:20 pm - 7:30 pmKEF-STL
34h 10m2 stops
$743Multiple Airlines
Find Deal
Tue, May 5 - Tue, May 12
Lufthansa Logo
4:50 pm - 2:15 pmSTL-KEF
16h 25m2 stops
Lufthansa Logo
3:10 pm - 10:59 pmKEF-STL
36h 49m2 stops
$745Lufthansa
Find Deal
Wed, Mar 18 - Tue, Mar 24
Lufthansa Logo
5:18 pm - 11:30 pmSTL-KEF
25h 12m2 stops
Lufthansa Logo
12:25 am - 3:21 pmKEF-STL
19h 56m2 stops
$760Lufthansa
Find Deal
Tue, May 5 - Wed, May 13
Lufthansa Logo
5:18 pm - 11:30 pmSTL-KEF
25h 12m2 stops
Lufthansa Logo
1:15 am - 9:04 pmKEF-STL
24h 49m2 stops
$762Lufthansa
Find Deal
Tue, May 5 - Thu, May 14
Delta Logo
1:30 pm - 9:30 amSTL-KEF
15h 00m2 stops
Delta Logo
8:50 am - 11:01 pmKEF-STL
19h 11m2 stops
$765Delta
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Sun, May 3 - Fri, May 15
Lufthansa Logo
5:18 pm - 11:30 pmSTL-KEF
25h 12m2 stops
Lufthansa Logo
2:20 pm - 1:30 pmKEF-STL
28h 10m1 stop
$771Lufthansa
Find Deal
Tue, May 5 - Thu, May 14
Lufthansa Logo
5:18 pm - 11:30 pmSTL-KEF
25h 12m2 stops
Lufthansa Logo
12:25 am - 9:04 pmKEF-STL
25h 39m2 stops
$780Lufthansa
Find Deal
Sat, May 2 - Mon, May 11

Lufthansa flights from St. Louis to Iceland

Our best Lufthansa deals on St. Louis to Iceland flight tickets
Lufthansa
May 5
STL5:18 pmLambert-St Louis
25h 12m
2 stops
KEF11:30 pmReykjavik Keflavik Intl
May 12
KEF2:20 pmReykjavik Keflavik Intl
28h 10m
1 stop
STL1:30 pmLambert-St Louis
$736
Find similar
Lufthansa
Mar 18
STL4:50 pmLambert-St Louis
16h 25m
2 stops
KEF2:15 pmReykjavik Keflavik Intl
Mar 24
KEF3:10 pmReykjavik Keflavik Intl
36h 49m
2 stops
STL10:59 pmLambert-St Louis
$745
Find similar
Lufthansa
May 5
STL5:18 pmLambert-St Louis
25h 12m
2 stops
KEF11:30 pmReykjavik Keflavik Intl
May 14
KEF1:15 amReykjavik Keflavik Intl
24h 49m
2 stops
STL9:04 pmLambert-St Louis
$762
Find similar

Delta flights from St. Louis to Iceland

Our best Delta deals on St. Louis to Iceland flight tickets
Delta
May 10
STL2:18 pmLambert-St Louis
11h 02m
1 stop
KEF6:20 amReykjavik Keflavik Intl
May 27
KEF8:50 amReykjavik Keflavik Intl
12h 59m
1 stop
STL4:49 pmLambert-St Louis
$760
Find similar
Delta
May 10
STL2:18 pmLambert-St Louis
11h 02m
1 stop
KEF6:20 amReykjavik Keflavik Intl
May 27
KEF8:50 amReykjavik Keflavik Intl
17h 00m
2 stops
STL8:50 pmLambert-St Louis
$765
Find similar
Delta
May 4
STL4:00 pmLambert-St Louis
12h 30m
2 stops
KEF9:30 amReykjavik Keflavik Intl
May 11
KEF8:50 amReykjavik Keflavik Intl
16h 41m
1 stop
STL8:31 pmLambert-St Louis
$785
Find similar

momondo 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, momondo users made 832,500 searches. Data last updated November 13, 2025.
Use the filters below to find and compare flights from St. Louis to Iceland that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Tue 5/5

5:18 pm-11:30 pm

2 stops25h 12m

Reykjavik Keflavik Intl

Mon 5/11

12:25 am-6:25 pm

2 stops23h 00m

$715

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Mon 5/4

4:00 pm-9:30 am

2 stops12h 30m

Reykjavik Keflavik Intl

Tue 5/12

11:25 am-4:40 pm

1 stop10h 15m

$735

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Tue 5/5

5:18 pm-11:30 pm

2 stops25h 12m

Reykjavik Keflavik Intl

Tue 5/12

2:20 pm-1:30 pm

1 stop28h 10m

$736

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Tue 5/5

5:18 pm-11:30 pm

2 stops25h 12m

Reykjavik Keflavik Intl

Tue 5/12

2:20 pm-7:30 pm

2 stops34h 10m

$743

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Wed 3/18

4:50 pm-2:15 pm

2 stops16h 25m

Reykjavik Keflavik Intl

Tue 3/24

3:10 pm-10:59 pm

2 stops36h 49m

$745

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Tue 5/5

5:18 pm-11:30 pm

2 stops25h 12m

Reykjavik Keflavik Intl

Wed 5/13

12:25 am-3:21 pm

2 stops19h 56m

$760

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Tue 5/5

5:18 pm-11:30 pm

2 stops25h 12m

Reykjavik Keflavik Intl

Thu 5/14

1:15 am-9:04 pm

2 stops24h 49m

$762

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Sun 5/3

1:30 pm-9:30 am

2 stops15h 00m

Reykjavik Keflavik Intl

Fri 5/15

8:50 am-11:01 pm

2 stops19h 11m

$765

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Tue 5/5

5:18 pm-11:30 pm

2 stops25h 12m

Reykjavik Keflavik Intl

Thu 5/14

2:20 pm-1:30 pm

1 stop28h 10m

$771

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Sat 5/2

5:18 pm-11:30 pm

2 stops25h 12m

Reykjavik Keflavik Intl

Mon 5/11

12:25 am-9:04 pm

2 stops25h 39m

$780

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to Iceland from

How to get the cheapest flight ticket from St. Louis to Iceland

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

What is the cheapest day to depart on your flight to Iceland?

The cheapest day to depart from St. Louis to Iceland is on a Tuesday when prices can be found for as low as $807. Flights from St. Louis to Iceland on a Thursday will generally be more expensive and average around $1,216. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Iceland?

According to our data, the cheapest time of day to fly to Iceland is in the morning. momondo users have found flights departing from St. Louis to Iceland in the morning for as low as $846. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Try not to purchase tickets in the afternoon because they tend to be around $1,040. Of course, these prices can vary depending on the time of year and what airport you fly to.

Cheap St. Louis to Iceland flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Iceland

Direct flights

None
There are no direct flights from St. Louis to Iceland. There are no popular flight routes from St. Louis to Iceland.
Search flight deals

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Iceland?

    Prices for flights from Lambert-St Louis Airport to Iceland are refreshed on a daily basis.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to Iceland?

  • How old do you have to be to fly from Lambert-St Louis Airport to Iceland?

    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 Lambert-St Louis Airport to Iceland.

  • What documentation or ID do you need to fly to Iceland?

    The travel and health documents required for your trip to Iceland can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Iceland. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from St. Louis to Iceland

Compare and see reviews for airlines that fly from St. Louis to Iceland with momondo
Airline
Rating
Free Cancellation
Price
Air CanadaPriceFrom $566Free CancellationRating
7.1
10,444 reviews
Search Air Canada flights
United AirlinesPriceFrom $595Free CancellationRating
7.4
9,015 reviews
Search United Airlines flights
DeltaPriceFrom $636Free CancellationRating
7.9
8,007 reviews
Search Delta flights
KLMPriceFrom $828Free CancellationRating
7.7
1,410 reviews
Search KLM flights

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Iceland?

Finding the right flight to Iceland from St. Louis is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Iceland quick and easy, saving you time and money.

Can I find flights from St. Louis to Iceland with flexible booking policies on momondo?

Flights from St. Louis to Iceland with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from St. Louis to Iceland?

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 St. Louis to Iceland.

I’m not ready to book a flight from St. Louis to Iceland right now. Can momondo alert me if prices change?

Price alerts on flights to Iceland from St. Louis 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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