Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from St. Louis to Reykjavik from $493

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 Reykjavik departing on 4/1. 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

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from St. Louis to Reykjavik

Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
6:32 am - 9:30 am
STL
-
KEF
21h 58m2 stops
Delta Logo
11:25 am - 9:05 am
KEF
-
STL
26h 40m2 stops
$493Delta
Wed, Apr 1 - Tue, Apr 7
Finnair Logo
10:00 pm - 7:50 am
STL
-
KEF
28h 50m2 stops
Finnair Logo
8:35 am - 6:17 pm
KEF
-
STL
38h 42m2 stops
$497Finnair
Wed, Apr 22 - Mon, Apr 27
Multiple Airlines Logo
11:51 am - 9:30 am
STL
-
KEF
16h 39m2 stops
Multiple Airlines Logo
8:50 am - 6:02 pm
KEF
-
STL
14h 12m2 stops
$556Multiple Airlines
Wed, May 6 - Mon, May 11
Lufthansa Logo
3:50 pm - 1:10 am
STL
-
KEF
27h 20m2 stops
Lufthansa Logo
3:20 pm - 2:55 pm
KEF
-
STL
28h 35m1 stop
$643Lufthansa
Wed, Mar 4 - Tue, Mar 10
Lufthansa Logo
3:50 pm - 1:10 am
STL
-
KEF
27h 20m2 stops
Lufthansa Logo
3:20 pm - 10:59 pm
KEF
-
STL
36h 39m2 stops
$670Lufthansa
Wed, Mar 4 - Tue, Mar 10
Multiple Airlines Logo
9:35 pm - 9:40 am
STL
-
KEF
31h 05m1 stop
Multiple Airlines Logo
10:45 am - 4:13 pm
KEF
-
STL
34h 28m2 stops
$697Multiple Airlines
Wed, Apr 22 - Mon, Apr 27
KLM Logo
3:50 pm - 7:00 am
STL
-
KEF
10h 10m1 stop
KLM Logo
9:30 am - 11:01 pm
KEF
-
STL
18h 31m1 stop
$733KLM
Sat, May 9 - Sun, May 24
Virgin Atlantic Logo
1:30 pm - 9:30 am
STL
-
KEF
15h 00m2 stops
Virgin Atlantic Logo
8:50 am - 11:38 pm
KEF
-
STL
19h 48m2 stops
$738Virgin Atlantic
Sat, May 9 - Sun, May 24
Multiple Airlines Logo
6:40 pm - 2:20 pm
STL
-
KEF
37h 40m2 stops
Multiple Airlines Logo
3:25 pm - 3:29 pm
KEF
-
STL
54h 04m2 stops
$744Multiple Airlines
Fri, Jan 16 - Fri, Jan 23
Lufthansa Logo
1:15 pm - 2:20 pm
STL
-
KEF
19h 05m2 stops
Lufthansa Logo
3:10 pm - 10:58 pm
KEF
-
STL
37h 48m2 stops
$813Lufthansa
Sat, Jan 17 - Sat, Jan 24

Lufthansa flights from St. Louis to Reykjavik Keflavik Intl Airport

Our best Lufthansa deals on St. Louis to Reykjavik Keflavik Intl Airport flight tickets
Lufthansa
Mar 4
STL3:50 pmLambert-St Louis
27h 20m
2 stops
KEF1:10 amReykjavik Keflavik Intl
Mar 10
KEF3:20 pmReykjavik Keflavik Intl
28h 35m
1 stop
STL2:55 pmLambert-St Louis
$643
Find similar
Lufthansa
Mar 4
STL3:50 pmLambert-St Louis
27h 20m
2 stops
KEF1:10 amReykjavik Keflavik Intl
Mar 10
KEF3:20 pmReykjavik Keflavik Intl
36h 39m
2 stops
STL10:59 pmLambert-St Louis
$670
Find similar
Lufthansa
Jan 17
STL1:15 pmLambert-St Louis
19h 05m
2 stops
KEF2:20 pmReykjavik Keflavik Intl
Jan 24
KEF3:10 pmReykjavik Keflavik Intl
37h 48m
2 stops
STL10:58 pmLambert-St Louis
$813
Find similar

Scandinavian Airlines flights from St. Louis to Reykjavik Keflavik Intl Airport

Our best Scandinavian Airlines deals on St. Louis to Reykjavik Keflavik Intl Airport flight tickets
Scandinavian Airlines
Jan 29
STL12:00 pmLambert-St Louis
29h 20m
2 stops
KEF11:20 pmReykjavik Keflavik Intl
Feb 5
KEF11:30 amReykjavik Keflavik Intl
42h 07m
2 stops
STL11:37 pmLambert-St Louis
$842
Find similar
Scandinavian Airlines
Mar 7
STL10:11 amLambert-St Louis
31h 44m
2 stops
KEF11:55 pmReykjavik Keflavik Intl
Mar 15
KEF4:15 pmReykjavik Keflavik Intl
36h 27m
2 stops
STL11:42 pmLambert-St Louis
$932
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Reykjavik Keflavik Intl Airport 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 December 22, 2025.
Use the filters below to find and compare flights from St. Louis to Reykjavik Keflavik Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Wed 4/1

6:32 am-9:30 am

2 stops21h 58m

Reykjavik Keflavik Intl

Tue 4/7

11:25 am-9:05 am

2 stops26h 40m

$493

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Wed 4/22

10:00 pm-7:50 am

2 stops28h 50m

Reykjavik Keflavik Intl

Mon 4/27

8:35 am-6:17 pm

2 stops38h 42m

$497

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Wed 5/6

11:51 am-9:30 am

2 stops16h 39m

Reykjavik Keflavik Intl

Mon 5/11

8:50 am-6:02 pm

2 stops14h 12m

$556

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Wed 3/4

3:50 pm-1:10 am

2 stops27h 20m

Reykjavik Keflavik Intl

Tue 3/10

3:20 pm-2:55 pm

1 stop28h 35m

$643

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Wed 3/4

3:50 pm-1:10 am

2 stops27h 20m

Reykjavik Keflavik Intl

Tue 3/10

3:20 pm-10:59 pm

2 stops36h 39m

$670

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Wed 4/22

9:35 pm-9:40 am

1 stop31h 05m

Reykjavik Keflavik Intl

Mon 4/27

10:45 am-4:13 pm

2 stops34h 28m

$697

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Sat 5/9

3:50 pm-7:00 am

1 stop10h 10m

Reykjavik Keflavik Intl

Sun 5/24

9:30 am-11:01 pm

1 stop18h 31m

$733

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Sat 5/9

1:30 pm-9:30 am

2 stops15h 00m

Reykjavik Keflavik Intl

Sun 5/24

8:50 am-11:38 pm

2 stops19h 48m

$738

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Fri 1/16

6:40 pm-2:20 pm

2 stops37h 40m

Reykjavik Keflavik Intl

Fri 1/23

3:25 pm-3:29 pm

2 stops54h 04m

$744

St. LouisReykjavik

STL - KEF

STLKEF

Lambert-St Louis

Sat 1/17

1:15 pm-2:20 pm

2 stops19h 05m

Reykjavik Keflavik Intl

Sat 1/24

3:10 pm-10:58 pm

2 stops37h 48m

$813

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 resultsSorted by cheapest first
1
2

See travel insights to Reykjavik from

How to get the cheapest flight ticket from St. Louis to Reykjavik Keflavik Intl Airport

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 Reykjavik Keflavik Intl Airport?

The cheapest day to depart from St. Louis to Reykjavik Keflavik Intl Airport is on a Wednesday when prices can be found for as low as $792. The most expensive day to fly to Reykjavik Keflavik Intl Airport is Thursday, with ticket prices averaging around $1,102.

What is the cheapest time of day to depart on your flight to Reykjavik Keflavik Intl Airport?

The cheapest time of day to fly to Reykjavik Keflavik Intl Airport is in the morning when flights can be purchased for as low as $835. Flights in the afternoon are often more expensive with an average ticket price of $1,022.

When to book flights from St. Louis to Reykjavik Keflavik Intl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Reykjavik Keflavik Intl Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap St. Louis to Reykjavik Keflavik Intl Airport (STL to KEF) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Reykjavik Keflavik Intl Airport

Fastest flight time

8h 30m

Direct flights

None
The fastest flight from St. Louis to Reykjavik Keflavik Intl Airport takes 8h 30m
There are no direct flights from St. Louis to Reykjavik Keflavik Intl Airport. There are no popular flight routes from St. Louis to Reykjavik Keflavik Intl Airport.
Search flight deals

  • How far is Lambert-St Louis to Reykjavik Keflavik Intl by plane?

    A flight from Lambert-St Louis to Reykjavik Keflavik Intl will travel around 3192.8 mi. Typically, this will take 8h 30m by plane in normal conditions.

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

    Prices for flights from Lambert-St Louis Airport to Reykjavik Keflavik Intl Airport were last updated today.

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

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

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Lambert-St Louis Airport to Reykjavik Keflavik Intl Airport.

  • What documentation or ID do you need to fly to Reykjavik Keflavik Intl Airport?

    The necessary travel and health documents for your Reykjavik Keflavik Intl 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.

  • What is the most popular airline from St. Louis to Reykjavik Keflavik Intl Airport?

Best airlines flying from St. Louis to Reykjavik Keflavik Intl Airport

Compare and see reviews for airlines that fly from St. Louis to Reykjavik Keflavik Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
Air CanadaPriceFrom $566Free CancellationRating
7.1
10,551 reviews
Search Air Canada flights
United AirlinesPriceFrom $595Free CancellationRating
7.4
9,102 reviews
Search United Airlines flights
DeltaPriceFrom $636Free CancellationRating
7.9
8,014 reviews
Search Delta flights
KLMPriceFrom $828Free CancellationRating
7.7
1,431 reviews
Search KLM flights

Traveling to a place near Reykjavik?

Book flights to Reykjavik if you plan to visit one of these locations
Keflavik
Selfoss
Hella
Hveragerdi
Borgarnes
Grindavik
Kopavogur

Why use momondo?

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

Finding the right flight to Reykjavik 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 Reykjavik quick and easy, saving you time and money.

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

Flights from St. Louis to Reykjavik 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 Reykjavik?

Once all potential St. Louis to Reykjavik flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Of course. momondo tracks the price of St. Louis to Reykjavik flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

An easier way to manage your Reykjavik Keflavik Intl Airport trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Wed 1/21
Wed 1/28
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Reykjavik