STL - KEF

$591 Find Cheap Flights from St. Louis to Reykjavik

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Reykjavik departing on 4/29. 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
$591
Virgin Atlantic
Wed 4/29Wed 5/6
STL - KEF • 2 stops
Top airlines
Cheapest • from $599 (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 $335 (round-trip)
Shortest trip • 5h 25m (one-way)
Insights
Insights
Insights
Insights
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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, Apr 29 - Wed, May 6
Multiple Airlines Logo
4:41 pm - 9:30 am
STL
-
KEF
11h 49m
2 stops
Multiple Airlines Logo
11:25 am - 1:10 pm
KEF
-
STL
30h 45m
2 stops
$591Multiple Airlines
Tue, Apr 28 - Tue, May 5
Virgin Atlantic Logo
4:41 pm - 9:30 am
STL
-
KEF
11h 49m
2 stops
Virgin Atlantic Logo
11:25 am - 9:19 pm
KEF
-
STL
14h 54m
2 stops
$599Virgin Atlantic
Sun, Apr 26 - Sun, May 3
Multiple Airlines Logo
11:42 am - 9:30 am
STL
-
KEF
16h 48m
2 stops
Multiple Airlines Logo
11:25 am - 3:32 pm
KEF
-
STL
33h 07m
2 stops
$660Multiple Airlines
Mon, May 11 - Tue, May 19
KLM Logo
11:22 am - 7:40 am
STL
-
KEF
15h 18m
1 stop
KLM Logo
8:50 am - 5:16 pm
KEF
-
STL
13h 26m
1 stop
$704KLM
Tue, May 12 - Wed, May 20
KLM Logo
10:15 am - 6:20 am
STL
-
KEF
15h 05m
1 stop
KLM Logo
8:50 am - 9:09 pm
KEF
-
STL
17h 19m
1 stop
$705KLM
Tue, May 12 - Wed, May 20
Multiple Airlines Logo
4:20 pm - 9:30 am
STL
-
KEF
12h 10m
1 stop
Multiple Airlines Logo
11:25 am - 9:09 pm
KEF
-
STL
14h 44m
2 stops
$709Multiple Airlines
Sat, Apr 25 - Sat, May 2
Delta Logo
6:48 am - 9:30 am
STL
-
KEF
21h 42m
2 stops
Delta Logo
11:25 am - 8:30 am
KEF
-
STL
26h 05m
2 stops
$729Delta
Sat, May 9 - Sun, May 17
KLM Logo
6:04 pm - 6:20 am
STL
-
KEF
31h 16m
1 stop
KLM Logo
9:30 am - 2:31 pm
KEF
-
STL
10h 01m
1 stop
$770KLM
Sat, Aug 15 - Wed, Aug 26
KLM Logo
5:45 pm - 7:40 am
STL
-
KEF
8h 55m
1 stop
KLM Logo
8:45 am - 8:31 pm
KEF
-
STL
16h 46m
1 stop
$775KLM
Sat, Aug 15 - Wed, Aug 26
Multiple Airlines Logo
5:45 pm - 7:40 am
STL
-
KEF
8h 55m
1 stop
Multiple Airlines Logo
8:45 am - 6:02 pm
KEF
-
STL
14h 17m
2 stops
$779Multiple Airlines
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 72 hours.

In the past 3 days, the cheapest round-trip tickets from St. Louis to Reykjavik were found on Virgin Atlantic ($599) and KLM ($704).

Good to know

Cheapest flight$591
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 3 days, the lowest price for a flight from St. Louis to Reykjavik Keflavik Intl Airport was $591 for a round-trip ticket.

  • 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 $987 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 $1,147 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 8294 reviews
8.5Crew
8.1Boarding
7.8Entertainment
7.2Food
7.9Comfort
Airline reviews

First class is comfortable. Enjoyed a movie and was able to relax compared to coach.

10.0 ExcellentAnonymous, Mar 2026
ATL - DTW
Read more Delta reviews

First class is comfortable. Enjoyed a movie and was able to relax compared to coach.

Loved flying First Class. Very comfortable. The seat was amazing. Enjoyed a movie and was able to relax so much better than in coach.

We landed and sat on the tarmac for 45 minutes because they only have one gate at the airport and there was another plane running late so we had to wait

The WiFi was not working. That made for a long flight.

With Aeromexico it ended up good but with Delta it was bad because we did everything through Delta... Showed up at the Delta terminal... It was the wrong place! Nothing ever told us to go to the Aeromexico terminal. It said "in partnership with Aeromexico" but I was never instructed to check in with them or go to their terminal. We had to haul @$$ running through the airport and almost didn't make it thanks to this poor communication. 👎🏽

Absolutely no communication on why there's a delay and multiple flight time reschedules. I would have canceled the flight and drove back home if I known it was going to be rescheduled 3 or 4 times.

Another late night flight and MORE men belligerently drinking and yelling. I had to move from first to economy because they were so obnoxious and disruptive. Crazy to go from a cozy chair to cardboard when you were supposed to be in first. Delta allows was too much drinking which leads to belligerent behavior.

I was in first class and literally the men behind me were so aggressively loud I moved myself to economy. This has become so common on Delta - people using audio without headphones, and men on 12am / late night flights drinking and yelling to talk to each other which prevents anyone around them from resting. Pretty crazy to have to move from first to economy (poorer service, less comfort...). Wild wild. Looking into other airlines.

Love delta smaller commuter plane so no entertainment and paid wifi on MKE-LGA leg was extremely unreliable and slow

Stop changing gates. Stop cancelling flights Stop moving my seat.

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 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.

First of all we couldn’t check in online, then we learn at the airport we were on stand by for KLM’s mistake of overbooking. The seats were not comfy at all. Our luggage got lost.

Ad experience - been flying many years with them but they are losing out to other carriers with their service and bagage / seating policy. My 2 12-yo kids were not placed with the parent. Absurdity.

Short flight so it was okay. Nice crew, all very pleasant and professional. We were near the back in row 27 so just as we got our drinks, we started our descent so had to drink very quickly!

Everything was on time and service on the flight was great!

Wifi Bluetooth features for watching in flight movie was horrible. Screen kept blacking out no connection of sound although it said connected. Other than that smooth trip .

The 777’s economy seat’s legroom was more tolerable than expected. I appreciate the reclining mechanism which slides the seat forward to minimize cannibalizing the space behind. The food was terrible: very salty.

The travel company that you have on your site did me so wrong. I don’t know how it happened, but they put my son‘s name on my plane ticket flying to Vietnam. Along with his birthday. They would not have let me fly from Fort Myers to Ho Chi Minh City. I don’t think that I can ever use your service again. I typed my information into the browser along with my passport number and four days before I’m leaving I have to quickly search another ticket to fly out here.

Seats are uncomfortable. This has been a trend in the industry for decades. Trying to fit more seats on each plane to increase profits at the expense of the passenger.

The flight was delayed so we were dead tired, and after that the turbulence was horrible. I was very scared.

It’s always a great time flying with united airlines.

Good flight. Efficient boarding and competent flight crew. No problems until we arrived at our destination gate. We were early so there was an aircraft at the gate that had to move before we could pull in. Then, due to the type of aircraft we flew, the cabin door could not be opened until some luggage from the cargo bay was offloaded to preserve center of gravity characteristics. So, that further delayed deplaning. Despite being 20 minutes early on landing, we ended up being 5 to 10 minutes late after all the delays.

Everything went well except the turbulence what no one have a control of but pilot and crew handled very good!

There was no WiFi available, there were mechanical problems with the plane and we landed at C 124, then the gate was switched to A 26, then all the way back to C126! For a 75 yo woman traveling alone, this was a difficult journey, indeed!

Departed Palm Springs over an hour late because there’s only one gate, and it has always delayed by the arriving and departing flight to Toronto and the arriving flight from Vancouver.

I checked a bag and there was only one agent to assist all customers with any issues.

I want to thank Carlos at the Miami AC desk - he was amazing and went over and above to help us out. Thank you Carlos and all the best to you!!! You made our faith in AC feel great! Sincerely, David Cubitt

Flight was canceled due to mechanical issues. After a considerable wait in the queue, Air Canada customer service was very helpful to get us on another flight. I am disappointed to report our rescheduled flight is for three days from now. Three days of extra expenses and inconvenience is unacceptable.

Extremely disappointing. My original Denver–Vancouver–Bangkok itinerary was cancelled due to a crewing issue. I was not proactively supported and had to drive back home after already reaching the airport. Communication was poor throughout, and attempts to contact customer service resulted in being on hold for nearly three hours without reaching anyone. Instead of being rebooked on the same direct routing the following day, I was rerouted onto a much longer itinerary via multiple cities and airlines, which resulted in arriving approximately 30 hours later than scheduled. At Denver airport, there was no visible Air Canada representative available to properly assist. Ground staff offered no real support beyond directing passengers to a phone number. There was no clear communication, no ownership, and no meaningful customer care during a major disruption. The final journey involved three flights instead of the original two, significantly increasing travel time and stress. Overall, the handling of the cancellation and lack of customer support was unacceptable. What could have been better? Clear communication during the cancellation Accessible customer service (phone support that actually answers) Proper in-person assistance at the airport Rebooking onto a comparable routing rather than a significantly longer one

Great setup on both flights except the last flight we got condensed dripping all over me in the last 20 mins of the flight

The last 3 hours it was freezing cold in row 56. Multiple people had their winter coats on and were utilizing the blankets provided by the airline. I also did not have easy access to figure out how to book my food allergy and advance for my meals. Most of everything I received was something I couldn't eat. This needs to be made more accessible. Also, I'm 5'10 which is the average height of the American male. I flew from Philadelphia to Toronto and then to Tokyo and the seats were absolutely unbearable. For that long of a flight it is impossible to get comfortable when doing anything. Flights need to have more space and stop prioritizing costs over people.

Was delayed at every point/ connection. Luggages missing for 5days. Had no medications for diabetes and high B/p. when bags where finally delivered on the 30th, the insulin and ozempic were no longer patent, as the ice pack had since dissolved and the authenticity of the med is now questionable, since they must be refrigerated. Please have them refund my bag fees. I should sue them for all the inconveniences caused to me.

The plane was delayed substantially due to a mechanical problem, that being said, the airline was very fair with providing a meal coupon for us. I would rather arrive late on a mechanically sound plane than the alternative. The food served in the plane was just awful, however and I recommend a new catering company.

I waiting for 2 hrs to retrieve my luggage. Didn't get home till 3am.

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

Information on your arrival and departure airports