STL - KEF

$419 Find Cheap Flights from St. Louis to Reykjavik

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Reykjavik departing on 8/11. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Reykjavik Keflavik Intl Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Reykjavik, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Reykjavik, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$804
Air Canada
Wed 7/8Tue 7/14
STL - KEF • 2 stops
Cheapest one-way
$419
Multiple Airlines
Tue 8/11
STL - KEF • 2 stops
Top airlines
Cheapest • from $804 (round-trip)
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between St. Louis and Reykjavik. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $928 (round-trip)
Shortest trip • 9h 28m (one-way)
Insights
Insights
Insights
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Reykjavik!
Flight Deals
Booking Insights
Flight Deals

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

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from St. Louis to Reykjavik that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

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

Wed, Jul 8 - Tue, Jul 14
Air Canada Logo
8:55 am - 7:55 am
STL
-
KEF
18h 00m
2 stops
Air Canada Logo
9:15 am - 6:42 pm
KEF
-
STL
14h 27m
1 stop
$804Air Canada
Sat, Aug 15 - Wed, Aug 26
United Airlines Logo
5:30 pm - 8:45 am
STL
-
KEF
34h 15m
2 stops
United Airlines Logo
9:50 am - 3:38 pm
KEF
-
STL
34h 48m
2 stops
$923United Airlines
Sat, Aug 15 - Wed, Aug 26
United Airlines Logo
5:30 pm - 8:45 am
STL
-
KEF
34h 15m
2 stops
United Airlines Logo
9:50 am - 8:07 pm
KEF
-
STL
15h 17m
1 stop
$936United Airlines
Sat, Aug 15 - Wed, Aug 26
KLM Logo
10:33 am - 7:40 am
STL
-
KEF
16h 07m
1 stop
KLM Logo
9:30 am - 4:52 pm
KEF
-
STL
12h 22m
1 stop
$950KLM
Sat, Aug 15 - Wed, Aug 26
Air Canada Logo
12:10 pm - 8:45 am
STL
-
KEF
39h 35m
2 stops
Air Canada Logo
9:50 am - 10:59 pm
KEF
-
STL
18h 09m
3 stops
$953Air Canada
Wed, Nov 4 - Tue, Nov 10
Multiple Airlines Logo
3:02 pm - 5:15 pm
STL
-
KEF
20h 13m
2 stops
Multiple Airlines Logo
6:00 pm - 7:30 pm
KEF
-
STL
31h 30m
2 stops
$957Multiple Airlines
Sun, Sep 20 - Wed, Sep 30
United Airlines Logo
6:54 pm - 8:50 am
STL
-
KEF
8h 56m
1 stop
United Airlines Logo
9:15 am - 3:43 pm
KEF
-
STL
35h 28m
2 stops
$964United Airlines
Mon, Sep 21 - Wed, Sep 30
United Airlines Logo
6:54 pm - 7:55 am
STL
-
KEF
32h 01m
2 stops
United Airlines Logo
9:15 am - 3:43 pm
KEF
-
STL
35h 28m
2 stops
$967United Airlines
Tue, Sep 1 - Wed, Sep 30
United Airlines Logo
12:59 pm - 8:30 am
STL
-
KEF
14h 31m
2 stops
United Airlines Logo
9:15 am - 2:11 pm
KEF
-
STL
33h 56m
2 stops
$968United Airlines
Tue, Jul 14 - Wed, Jul 22
KLM Logo
1:54 pm - 7:40 am
STL
-
KEF
12h 46m
1 stop
KLM Logo
8:45 am - 5:53 pm
KEF
-
STL
14h 08m
2 stops
$969KLM
Booking Insights

KAYAK's insights & trends for St. Louis to Reykjavik flights

Get data-powered insights and trends into flights from St. Louis to Reykjavik to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from St. Louis to Reykjavik?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 7 days.

In the past 7 days, the cheapest round-trip tickets from St. Louis to Reykjavik were found on Air Canada ($804) and United Airlines ($923).

Good to know

Cheapest flight$419
Flight from St. Louis to Reykjavik

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
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking St. Louis to Reykjavik flights

  • What is the cheapest flight from St. Louis to Reykjavik Keflavik Intl Airport?

    In the last 7 days, the lowest price for a flight from St. Louis to Reykjavik Keflavik Intl Airport was $419 for a one-way ticket and $804 for a round-trip.

  • Do I need a passport to fly between St. Louis and Reykjavik?

    Yes, you’ll need a passport to travel to Reykjavik from St. Louis.

  • Which airports will I be using when flying from St. Louis to Reykjavik?

    On your way to Reykjavik, you’ll fly out from Lambert-St Louis. You’ll be landing at Reykjavik Keflavik Intl.

  • Which aircraft models fly most regularly from St. Louis to Reykjavik?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from St. Louis to Reykjavik?

    SkyTeam, and Star Alliance are the airline alliances operating flights between St. Louis and Reykjavik, with SkyTeam being the most commonly used for this route.

  • Which is the best airline for flights from St. Louis to Reykjavik, Delta or KLM?

    The two airlines most popular with KAYAK users for flights from St. Louis to Reykjavik are Delta and KLM. With an average price for the route of $1,080 and an overall rating of 7.9, Delta is the most popular choice. KLM is also a great choice for the route, with an average price of $1,080 and an overall rating of 7.8.

  • How does KAYAK find such low prices on flights from St. Louis to Reykjavik?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from St. Louis to Reykjavik.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from St. Louis to Reykjavik?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Reykjavik from St. Louis is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from St. Louis to Reykjavik?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Reykjavik with an airline and back to St. Louis with another airline. Booking your flights between St. Louis and KEF can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from St. Louis to Reykjavik?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Reykjavik from St. Louis up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 4 airlines serving from St. Louis to Reykjavik

 
See real verified KAYAK customer reviews for airlines flying from St. Louis to Reykjavik. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from St. Louis to Reykjavik? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
DeltaOverall score based on 8423 reviews
7.2Food
8.5Crew
8.1Boarding
7.8Comfort
7.8Entertainment
Airline reviews

Planes were clean, no water or snacks on either flight.

6.0 GoodAnonymous, May 2026
ECP - ATL
Read more Delta reviews

Planes were clean, no water or snacks on either flight.

Free & relatively fast Wi-Fi. Would've liked a wider drink selection.

I continue to be satisfied with Delta’s excellent service out of LGA. The digit id works well and gets me through security in no time. Whenever possible, I choose Delta.

Was revoked with Jet Blue due to delay from Kenya Air

The Boarding process was great. Particularly since my wife and I require assistance. The flight attendants were amazing. We travel frequently; they honestly were a cut above. 😀

Enjoyed it very much. Especially liked the free WiFi that Delta offers.

Smooth flight. Left on time, and got in 15 minutes early. Onboard video was great

For some reason, TSA Atlanta didn’t have my bag on the flight on time and they don’t have to provide Delta a reason for that.

WiFi didn’t work on two of four planes. Flight attendants were not overly friendly or welcoming. Planes were extremely slow to board and deplane.

Delta does a great job with entertainment and free wifi. I can still be in touch with my colleagues while in the air.

Brand new plane lots of room the snack was very flavourful and enjoyable

As per usual when you Hit the UK it's a slow process through customs Not as efficient at Thailand for sure

The crew were unprofessional with a racist element. I was physically abused as well from one of the crew members

Terrible last row seats many seats available but no offer to move to better seat

Delay on my previous leg, had to run to catch my flight. But that happens. Overall ok.

Delay and had to run between flight to get my connection due to this delay but besides that the overall experience was ok. I arrived with just an hour of delay.

Flight was ok but lack of communication cost me to literally beg to be put on another flight as connecting flight had departed

They forgot to serve food and the crew was very unfriendly. Never experienced such a bad KLM flight. Usually fly from Toronto. New York was different.

Couldn’t get boarding pass in SLC even with help from a redcoat, so had to find a desk in AMS to get boarding pass. Technical problems so not sure why. Very inconvenient. The KLM app is not as user friendly as most apps. Also had to wait almost an hour on the tarmac for a fuel truck, which caused us to miss a connecting bus in LUX.

Over 1 Hr delay. No APU so no AC on ground. Plane was hot during boarding and then they closed the doors over 20 minutes before engine start so interior of plane was steamy hot and stuffy. Could have been helped by opening doors until ready to depart.

Seat pitch is horrible especially on the 15 hour flight. Gate crew at SFO was Outstanding. The flight crew was also great.

Easy of boarding, helpfully staff at check in, surprisingly comfortable seating

Check in was chaotic with only one counter for business class and first class. The luggage conveyor belt at JFK airport was broken so the flight departure was delayed which made the flight stressful as I had a tight connection. Although the captain said they could make up the delay, they didn’t do so.

Had a one hour delay due to mechanical issue. I didn’t think I’d be able to make my connecting flight, but they waited for me and greeted me when I arrived to help things run smooth.

Lost of requested seat assignments. Lost my husband's meal choice

6 1/2 hours from Tampa to SFO on a Boeing 737. Cramped. No Service. No real food. One pass for coffee at the beginning and a second pass THREE hours later. And check-in in Tampa was nasty even by United standards. And I am at almost TWO million miles on United. It's a non-stop. But terrible service.

MY FAMILY'S LUGGAGE WAS LOST FROM ROME TO BARI. I WAS THE ONLY ONE THAT RECEIVED MY LUGGAGE FROM ROME TO BARI. AFTER DEPLANING IN BARI, WE WASTED A LOT OF TIME AT BAG CLAIMS LOST AND FOUND REPORTING THE CLAIM AND PLEADING FOR THE BAGS TO BE DELIVERED THE NEXT DAY. WE WERE TOLD THAT IT TAKES 3 DAYS MINIMUM TO DELIVER. MY DAUGHTER AND MY GIRLFRIEND NEEDED THEIR PERSONAL THINGS AND WE WERE STAYING 3 HOURS AWAY FROM THE BARI AIRPORT. WE HAD TO DRIVE 3 HOURS TO THE AIRPORT TO COLLECT OUR LOST LUGGAGE THE NEXT DAY. WE ARE NOT HAPPY WITH THE EXPERIENCE

We had a delay, but thankfully I made it to my connection. Overall it went smooth

The flight had a delay but I made it to my connection. Flight was smooth overall

As I wrote earlier, poor planning and/or communication. At least twice, we were told that we would be boarding in less than ten minutes, only to have the flight again delayed at least another hour.

Loved and was pleasantly surprised by the food!! Request Lufthansa to help transiting passengers at Munich (confusion whether to go thru passport control or not).

The flight was comfortable and the staff were helpful and friendly. However, we did not know we were flying PAL until we arrived in Canada, so it was a bit disconcerting. In addition, which port we were leaving from was confusing.

They did not let us board because one member needed a transit visa, which was not evident at the time of ticket purchase.

I was charge a baggage checking fee $68!! I volunteered to check my duffle bag which usually goes under my seat!

I did not like anything because the flight was cancelled yesterday and I did not get to arrive on time in Toronto as I was rebooked with another airline. This caused me to be really stressed out as I am an individual with back injury and to be forced to stay longer in an airport to accommodate a change of airline and the transfers associated with it Due to this I am probably not going to book through your website to eliminate this potentially chaos in the future

shittiest airline in the hemisphere. To improve - start thinking you're flying people, not cattle

Easy boarding, inflight refreshments came on time and comfortable seat

It was good that our flight left early. It was a nice smooth flight and landing.

All good……but luggage didn’t make it on the airplane. Had to wait 3 days. Was a bummer.

Small suitcase used for carryon the last time was refused by boarding crew this time. Appears to be at the discretion and mood of the person on the day. Flight was only half booked, there would have been no problem with space.

Everything you need to know for your flight from St. Louis to Reykjavik

Information on your arrival and departure airports