STL - KEF

$510 Find Cheap Flights from St. Louis to Reykjavik - Compare and Save

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Everything you should know

Cheapest round-trip
$778
Typical prices: $915-$1,280
Scandinavian Airlines
Sat 4/21Fri 4/27
STL - KEF • 2 stops
Cheapest one-way
$510
Typical prices: $465-$699
Multiple Airlines
Fri 11/16
STL - KEF • 3 stops
Nonstop flights
Not available
There are currently no direct flights between St. Louis and Reykjavik Keflavik Intl Airport. You'll need to take a connecting flight to reach the destination.
Insights
Insights
When to travel
March
Cheapest • 18% price drop
July
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Orlando (MCO)
Cheapest • Avg $811 (round-trip)
Minneapolis St Paul (MSP)
Shortest trip • 9h 37m (one-way)
Insights
Insights
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We hope you love your trip to Reykjavik Keflavik Intl Airport!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from St. Louis to Reykjavik (STL-KEF)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from St. Louis to Reykjavik

Wed, Apr 21 - Tue, Apr 27
Scandinavian Airlines Logo
1:30 pm - 9:40 amSTL  Lambert-St Louis-KEF Reykjavik Keflavik Intl
39h 10m2 stops Atlanta Hartsfield-Jackson Kastrup Copenhagen
Scandinavian Airlines Logo
5:05 pm - 11:39 pmKEF  Reykjavik Keflavik Intl-STL Lambert-St Louis
35h 34m2 stops Kastrup Copenhagen Atlanta Hartsfield-Jackson
$778Scandinavian Airlines
Tue, Feb 9 - Tue, Feb 16
Multiple Airlines Logo
11:00 am - 5:15 pmSTL  Lambert-St Louis-KEF Reykjavik Keflavik Intl
24h 15m2 stops New York LaGuardia Helsinki-Vantaa
Multiple Airlines Logo
10:00 am - 11:10 pmKEF  Reykjavik Keflavik Intl-STL Lambert-St Louis
43h 10m2 stops Helsinki-Vantaa Dallas/Fort Worth
$778Multiple Airlines
Wed, Dec 2 - Tue, Dec 15
Scandinavian Airlines Logo
12:36 pm - 10:50 amSTL  Lambert-St Louis-KEF Reykjavik Keflavik Intl
40h 14m2 stops Atlanta Hartsfield-Jackson Kastrup Copenhagen
Scandinavian Airlines Logo
11:35 am - 12:05 amKEF  Reykjavik Keflavik Intl-STL Lambert-St Louis
42h 30m2 stops Kastrup Copenhagen Atlanta Hartsfield-Jackson
$782Scandinavian Airlines
Tue, Mar 30 - Mon, Apr 5
Lufthansa Logo
3:30 pm - 8:25 amSTL  Lambert-St Louis-KEF Reykjavik Keflavik Intl
35h 55m2 stops Frankfurt am Main Zurich
Lufthansa Logo
12:20 am - 1:25 pmKEF  Reykjavik Keflavik Intl-STL Lambert-St Louis
18h 05m1 stop Frankfurt am Main
$789Lufthansa
Sun, Nov 22 - Tue, Dec 1
Multiple Airlines Logo
8:00 am - 10:00 amSTL  Lambert-St Louis-KEF Reykjavik Keflavik Intl
20h 00m2 stops Washington, D.C. Dulles Intl Chicago O'Hare Intl
Multiple Airlines Logo
3:20 pm - 1:45 pmKEF  Reykjavik Keflavik Intl-STL Lambert-St Louis
28h 25m1 stop Frankfurt am Main
$790Multiple Airlines
Mon, Dec 7 - Mon, Dec 14
Multiple Airlines Logo
10:25 am - 5:15 pmSTL  Lambert-St Louis-KEF Reykjavik Keflavik Intl
24h 50m2 stops Dallas/Fort Worth Helsinki-Vantaa
Multiple Airlines Logo
10:00 am - 10:20 pmKEF  Reykjavik Keflavik Intl-STL Lambert-St Louis
42h 20m2 stops Helsinki-Vantaa Dallas/Fort Worth
$790Multiple Airlines
Sun, Nov 22 - Tue, Dec 1
Multiple Airlines Logo
1:08 pm - 10:00 amSTL  Lambert-St Louis-KEF Reykjavik Keflavik Intl
14h 52m1 stop Chicago O'Hare Intl
Multiple Airlines Logo
3:20 pm - 1:45 pmKEF  Reykjavik Keflavik Intl-STL Lambert-St Louis
28h 25m1 stop Frankfurt am Main
$790Multiple Airlines
Mon, Jan 18 - Mon, Jan 25
Multiple Airlines Logo
8:47 am - 5:15 pmSTL  Lambert-St Louis-KEF Reykjavik Keflavik Intl
26h 28m2 stops Dallas/Fort Worth Helsinki-Vantaa
Multiple Airlines Logo
10:00 am - 8:01 pmKEF  Reykjavik Keflavik Intl-STL Lambert-St Louis
40h 01m2 stops Helsinki-Vantaa Dallas/Fort Worth
$795Multiple Airlines
Tue, Nov 24 - Thu, Dec 3
United Airlines Logo
5:55 pm - 10:00 amSTL  Lambert-St Louis-KEF Reykjavik Keflavik Intl
34h 05m2 stops Houston George Bush Intcntl Chicago O'Hare Intl
United Airlines Logo
12:00 pm - 5:05 pmKEF  Reykjavik Keflavik Intl-STL Lambert-St Louis
11h 05m1 stop Chicago O'Hare Intl
$808United Airlines
Tue, Nov 24 - Thu, Dec 3
United Airlines Logo
6:15 am - 10:00 amSTL  Lambert-St Louis-KEF Reykjavik Keflavik Intl
45h 45m2 stops Houston George Bush Intcntl Chicago O'Hare Intl
United Airlines Logo
12:00 pm - 9:49 amKEF  Reykjavik Keflavik Intl-STL Lambert-St Louis
27h 49m2 stops Chicago O'Hare Intl Newark
$813United Airlines
Booking Insights

Price, demand and travel trends for St. Louis to Reykjavik Keflavik Intl Airport flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights with more confidence.

How much is a round-trip flight from St. Louis to Reykjavik Keflavik Intl Airport?

Round-trip flights from St. Louis to Reykjavik Keflavik Intl Airport typically range from $915 to $1,280. The lowest price found in the past 5 days was $778, on Scandinavian Airlines.

What's the cheapest day of the week to fly from St. Louis to Reykjavik Keflavik Intl Airport?

Based on deals KAYAK users found in the last 12 months, Monday is the cheapest day of the week to fly from St. Louis to Reykjavik Keflavik Intl Airport. It’s 26% cheaper than the average day, while Wednesday is the most expensive, with prices 8% higher.

What’s the cheapest month to fly from St. Louis to Reykjavik Keflavik Intl Airport?

•March is the cheapest month to fly from St. Louis to Reykjavik Keflavik Intl Airport at $865 round-trip.
•February ($2,621) and April ($2,359) are the most expensive months.
•The price difference between flying in the cheapest and most expensive months is 203% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

Find deals

Key details for St. Louis to Reykjavik Keflavik Intl Airport flights

Low season

March

Cheapest flight

$510
Beat the crowds with an average 83% drop in travelers.
The most popular month to fly with an average 104% increase in travelers.
One-way flight from St. Louis to Reykjavik Keflavik Intl Airport

When to book flights from St. Louis to Reykjavik

Are your dates flexible? Find out the best times to travel from St. Louis to Reykjavik based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

Your St. Louis to Reykjavik Keflavik Intl Airport flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines and booking tips.

  • What cabin classes can I book on flights from St. Louis to Reykjavik Keflavik Intl Airport?

    Four cabin classes are available on flights from St. Louis to Reykjavik Keflavik Intl Airport:

    • Economy Class
    • Premium Economy Class
    • Business Class
    • First Class

    Prices vary by airline.

  • How long is a flight from St. Louis to Reykjavik Keflavik Intl Airport?

    A nonstop flight from St. Louis to Reykjavik Keflavik Intl Airport takes 00m, covering 3,191 miles.

  • Do I need a passport to fly from St. Louis to Reykjavik Keflavik Intl Airport?

    Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

  • How much should I expect to pay for a St. Louis to Reykjavik Keflavik Intl Airport flight?

    Round-trip flights from St. Louis to Reykjavik Keflavik Intl Airport range from $915 to $1,280, with an average of $1,057 over the past 12 months. Anything below $915 counts as a good deal.

  • What is the standard checked-bag allowance on flights from St. Louis to Reykjavik Keflavik Intl Airport?

    There is no standard. Checked-bag policies vary by airline on this route. Most carriers charge $100–$100 for the first checked bag in economy. Premium fares and elite-status bookings typically include a free checked bag.

  • Have flight prices from St. Louis to Reykjavik Keflavik Intl Airport changed much recently?

    Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $778 to $5,861. That means the highest observed fare was about 8x higher than the lowest one.

  • How are flight prices from St. Louis to Reykjavik Keflavik Intl Airport looking right now?

    One-way fares from St. Louis to Reykjavik Keflavik Intl Airport are currently in line with typical prices for this route. Average one-way fares are about $557.

  • What car rental options are available at Reykjavik Keflavik Intl Airport (KEF)?

    Reykjavik Keflavik Intl Airport (KEF) hosts 5 major car rental companies, with daily rates starting from around $16 for economy cars. Top options include:

    • Ice Rental 4x4
    • Fair Car
    • Budget
    • Alamo
    • Europcar

  • Which airports can I use when flying from St. Louis to Reykjavik Keflavik Intl Airport?

    Flights from St. Louis to Reykjavik Keflavik Intl Airport usually depart from Lambert-St Louis (STL) and arrive at Reykjavik Keflavik Intl (KEF).

  • Which airports do connecting flights from St. Louis to Reykjavik Keflavik Intl Airport pass through?

    One-stop flights from St. Louis to Reykjavik Keflavik Intl Airport most commonly connect through:

    • Chicago O'Hare Intl (ORD) - 38% of one-stop connections
    • Minneapolis St Paul (MSP) - 23% of one-stop connections
    • Baltimore/Washington (BWI) - 15% of one-stop connections
    • Detroit Metropolitan Wayne County (DTW) - 7% of one-stop connections

  • Can I save money by using flexible dates for flights from St. Louis to Reykjavik Keflavik Intl Airport?

    Yes. Flexible dates can save you up to 32% on flights from St. Louis to Reykjavik Keflavik Intl Airport. Monday is the cheapest departure day at $784 round-trip on average, while Wednesday is the most expensive at $1,143, a difference of $359.

    KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • How much time can I save by choosing a different layover airport from St. Louis to Reykjavik Keflavik Intl Airport?

    Flying via Minneapolis St Paul (MSP) gives the shortest average 1-stop total travel time at 9h 37m, compared with 9h 45m via Detroit Metropolitan Wayne County (DTW) and 10h 03m via Chicago O'Hare Intl (ORD).

  • What is the time difference between St. Louis and Reykjavik Keflavik Intl Airport?

    Reykjavik Keflavik Intl Airport is 5 hours ahead of St. Louis (Greenwich Mean Time vs Central Time). Plan for the time shift when scheduling connections or first-day activities.

  • What popular places can I visit in Reykjavik Keflavik Intl Airport?

    Some of the most popular sights in Reykjavik Keflavik Intl Airport are Harpa, Laugardalsholl and The Settlement Exhibition: Reykjavík 871±2. These are among the most viewed places in Reykjavik Keflavik Intl Airport on KAYAK.

  • Which airlines offer extra legroom and free seat selection on St. Louis to Reykjavik Keflavik Intl Airport flights?

    Among airlines operating St. Louis to Reykjavik Keflavik Intl Airport flights:

    • Icelandair: offers free seat selection

    Extra legroom and free seat selection availability depends on fare class and route.

  • Which airlines include bags at no extra cost on St. Louis to Reykjavik Keflavik Intl Airport flights?

    Here are some options for this route, based on selected ticket types and cabin classes:

    • Icelandair: a cabin bag and a checked bag in Economy Class

    Bag allowance can vary by ticket type, cabin class, route and airline, so always check the fare details before booking.

Your guide to booking St. Louis to Reykjavik Keflavik Intl Airport flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates are flexible, aim for a Monday departure and avoid flying on Wednesday. On this route, Monday flights average $784, about $359 less than Wednesday fares (31% savings) based on the last 12 months.
  • If you can choose when to travel, plan your St. Louis to Reykjavik Keflavik Intl Airport trip for March. Fares historically average $865 round-trip in that month - typically $1,756 less than the most expensive month, which is February (based on the last 12 months).

More options for your flight from St. Louis to Reykjavik

Complete your trip to Reykjavik with a hotel stay or car rental

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