STL - KEF

$736 Find Cheap Flights from St. Louis to Reykjavik - Compare and Save

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1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$736
Typical prices: $848-$1,247
Finnair
Thu 1/18Thu 1/25
STL - KEF • 2 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
August
Cheapest • 21% 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

Mon, Jan 18 - Mon, Jan 25
Finnair Logo
12:53 pm - 5:15 pmSTL  Lambert-St Louis-KEF Reykjavik Keflavik Intl
22h 22m2 stops Dallas/Fort Worth Helsinki-Vantaa
Finnair Logo
10:00 am - 8:01 pmKEF  Reykjavik Keflavik Intl-STL Lambert-St Louis
40h 01m2 stops Helsinki-Vantaa Dallas/Fort Worth
$736Finnair
Tue, Jan 26 - Mon, Feb 1
Finnair Logo
11:15 am - 9:15 amSTL  Lambert-St Louis-KEF Reykjavik Keflavik Intl
40h 00m2 stops Dallas/Fort Worth Helsinki-Vantaa
Finnair Logo
10:00 am - 8:01 pmKEF  Reykjavik Keflavik Intl-STL Lambert-St Louis
40h 01m2 stops Helsinki-Vantaa Dallas/Fort Worth
$736Finnair
Tue, Jan 26 - Mon, Feb 1
Finnair Logo
11:15 am - 9:15 amSTL  Lambert-St Louis-KEF Reykjavik Keflavik Intl
40h 00m2 stops Dallas/Fort Worth Helsinki-Vantaa
Finnair Logo
10:00 am - 8:01 pmKEF  Reykjavik Keflavik Intl-STL Lambert-St Louis
40h 01m2 stops Helsinki-Vantaa Dallas/Fort Worth
$736Finnair
Mon, Nov 9 - Mon, Nov 16
Multiple Airlines Logo
8:29 am - 5:15 pmSTL  Lambert-St Louis-KEF Reykjavik Keflavik Intl
26h 46m2 stops Dallas/Fort Worth Helsinki-Vantaa
Multiple Airlines Logo
10:00 am - 8:19 pmKEF  Reykjavik Keflavik Intl-STL Lambert-St Louis
40h 19m2 stops Helsinki-Vantaa Dallas/Fort Worth
$753Multiple Airlines
Fri, Feb 5 - Fri, Feb 12
Multiple Airlines Logo
7:02 pm - 6:05 amSTL  Lambert-St Louis-KEF Reykjavik Keflavik Intl
29h 03m1 stop Denver Intl
Multiple Airlines Logo
4:55 pm - 10:20 amKEF  Reykjavik Keflavik Intl-STL Lambert-St Louis
23h 25m1 stop Denver Intl
$784Multiple Airlines
Mon, Feb 8 - Mon, Feb 15
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 - 7:41 pmKEF  Reykjavik Keflavik Intl-STL Lambert-St Louis
39h 41m2 stops Helsinki-Vantaa Dallas/Fort Worth
$808Multiple Airlines
Fri, Feb 5 - Fri, Feb 12
American Airlines Logo
11:34 am - 3:05 pmSTL  Lambert-St Louis-KEF Reykjavik Keflavik Intl
21h 31m2 stops Chicago O'Hare Intl London Heathrow
American Airlines Logo
11:45 am - 11:58 pmKEF  Reykjavik Keflavik Intl-STL Lambert-St Louis
18h 13m2 stops London Heathrow Chicago O'Hare Intl
$809American Airlines
Thu, Jan 28 - Fri, Feb 5
American Airlines Logo
1:45 pm - 5:05 pmSTL  Lambert-St Louis-KEF Reykjavik Keflavik Intl
21h 20m2 stops Chicago O'Hare Intl London Heathrow
American Airlines Logo
11:45 am - 12:04 amKEF  Reykjavik Keflavik Intl-STL Lambert-St Louis
18h 19m2 stops London Heathrow Chicago O'Hare Intl
$809American Airlines
Wed, Nov 25 - Mon, Nov 30
United Airlines Logo
1:40 pm - 10:00 amSTL  Lambert-St Louis-KEF Reykjavik Keflavik Intl
14h 20m2 stops Denver Intl Chicago O'Hare Intl
United Airlines Logo
12:00 pm - 9:45 amKEF  Reykjavik Keflavik Intl-STL Lambert-St Louis
51h 45m2 stops Chicago O'Hare Intl Houston George Bush Intcntl
$829United Airlines
Thu, Nov 5 - Thu, Nov 12
United Airlines Logo
8:30 am - 10:00 amSTL  Lambert-St Louis-KEF Reykjavik Keflavik Intl
43h 30m2 stops Houston George Bush Intcntl Chicago O'Hare Intl
United Airlines Logo
12:00 pm - 9:52 pmKEF  Reykjavik Keflavik Intl-STL Lambert-St Louis
15h 52m2 stops Chicago O'Hare Intl Newark
$902United 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 $848 to $1,247. The lowest price found in the past 5 days was $736, on Finnair.

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 24% cheaper than the average day, while Saturday is the most expensive, with prices 8% higher.

Find deals

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

Low season

February

Cheapest flight

$736
Beat the crowds with an average 94% drop in travelers.
The most popular month to fly with an average 92% increase in travelers.
Round-trip 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?

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

    • Economy Class
    • Premium Economy Class
    • First Class

  • 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 $848 to $1,247, with an average of $1,027 over the past 12 months. Anything below $848 counts as a good deal.

  • 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 $736 to $4,088. That means the highest observed fare was about 6x higher than the lowest one.

  • 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
    • Europcar
    • Alamo

  • 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) - 43% of one-stop connections
    • Minneapolis St Paul (MSP) - 25% of one-stop connections
    • Detroit Metropolitan Wayne County (DTW) - 9% of one-stop connections
    • Baltimore/Washington (BWI) - 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 30% on flights from St. Louis to Reykjavik Keflavik Intl Airport. Monday is the cheapest departure day at $784 round-trip on average, while Saturday is the most expensive at $1,119, a difference of $335.

    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 48m via Detroit Metropolitan Wayne County (DTW) and 10h 06m 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.

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 Saturday. On this route, Monday flights average $784, about $335 less than Saturday fares (30% 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 August. Fares historically average $812 round-trip in that month - typically $1,809 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

Car rentals in Reykjavik
Hotels in Reykjavik
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