STL - KEF

$507 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 6/15. 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
$763
Multiple Airlines
Thu 2/19Thu 2/26
STL - KEF • 2 stops
Cheapest one-way
$577
Multiple Airlines
Mon 6/15
STL - KEF • 3 stops
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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

Thu, Feb 19 - Thu, Feb 26
Multiple Airlines Logo
10:11 pm - 6:05 am
STL
-
KEF
25h 54m2 stops
Multiple Airlines Logo
4:55 pm - 1:09 pm
KEF
-
STL
26h 14m1 stop
$763Multiple Airlines
Thu, Feb 19 - Thu, Feb 26
Multiple Airlines Logo
7:00 am - 6:15 am
STL
-
KEF
17h 15m1 stop
Multiple Airlines Logo
5:00 pm - 1:51 pm
KEF
-
STL
26h 51m1 stop
$813Multiple Airlines
Sun, Feb 8 - Sun, Feb 15
Multiple Airlines Logo
12:03 pm - 6:05 am
STL
-
KEF
12h 02m1 stop
Multiple Airlines Logo
4:55 pm - 1:09 pm
KEF
-
STL
26h 14m1 stop
$852Multiple Airlines
Mon, Feb 2 - Mon, Feb 9
Multiple Airlines Logo
10:16 am - 11:15 am
STL
-
KEF
42h 59m2 stops
Multiple Airlines Logo
5:00 pm - 1:54 pm
KEF
-
STL
26h 54m1 stop
$949Multiple Airlines
Mon, Mar 9 - Wed, Mar 18
Multiple Airlines Logo
7:52 am - 6:15 am
STL
-
KEF
17h 23m1 stop
Multiple Airlines Logo
5:15 pm - 7:07 am
KEF
-
STL
18h 52m1 stop
$1,003Multiple Airlines
Sun, Feb 8 - Sun, Feb 15
Multiple Airlines Logo
5:42 pm - 3:20 pm
STL
-
KEF
39h 38m2 stops
Multiple Airlines Logo
4:55 pm - 1:09 pm
KEF
-
STL
26h 14m1 stop
$1,019Multiple Airlines
Mon, Jan 26 - Mon, Feb 2
Scandinavian Airlines Logo
3:45 pm - 3:25 pm
STL
-
KEF
17h 40m2 stops
Scandinavian Airlines Logo
7:35 am - 11:37 pm
KEF
-
STL
22h 02m2 stops
$1,040Scandinavian Airlines
Thu, Mar 19 - Thu, Mar 26
Multiple Airlines Logo
7:52 am - 6:20 pm
STL
-
KEF
29h 28m2 stops
Multiple Airlines Logo
4:55 pm - 9:49 am
KEF
-
STL
21h 54m1 stop
$1,045Multiple Airlines
Thu, Feb 5 - Fri, Feb 13
Multiple Airlines Logo
5:42 pm - 10:20 am
STL
-
KEF
58h 38m2 stops
Multiple Airlines Logo
5:00 pm - 1:51 pm
KEF
-
STL
26h 51m1 stop
$1,050Multiple Airlines
Sun, Feb 8 - Sun, Feb 15
Multiple Airlines Logo
4:05 pm - 2:20 pm
STL
-
KEF
40h 15m2 stops
Multiple Airlines Logo
3:20 pm - 3:29 pm
KEF
-
STL
54h 09m2 stops
$1,074Multiple 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 fly non-stop between St. Louis and Reykjavik Keflavik Intl Airport?

Airline and price data is aggregated from results in KAYAK’s search results from the last 2 weeks for round-trip flights from St. Louis to Reykjavik Keflavik Intl Airport.

There are 4 airlines that fly nonstop from St. Louis to Reykjavik Keflavik Intl Airport. They are: Air Canada, Delta, KLM and United Airlines. The cheapest price of all airlines flying this route was found with Air Canada at $566 for a round-trip flight. On average, the best prices for this route can be found at Air Canada.

Good to know

Cheapest flight$577
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 $577 for a one-way ticket and $507 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 $1,036 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 7.7.

  • 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 8017 reviews
7.8Entertainment
7.2Food
7.9Comfort
8.5Crew
8.1Boarding
Airline reviews

I really liked the legroom. I am 6’4”.a at For some reason our seats were not together and using the app to fix it didn’t work. Passengers were nice enough to move for us but you should absolutely ensure a parent sits with their child.

6.0 GoodJason, Jan 2026
BOS - SFO
Read more Delta reviews

I really liked the legroom. I am 6’4”.a at For some reason our seats were not together and using the app to fix it didn’t work. Passengers were nice enough to move for us but you should absolutely ensure a parent sits with their child.

Late delayed flight delays boarding and delays leaving and delays on arrival too. Cramped plane no room no food.

DTW line is too long. The flights from DTW to BWI are always delayed for unknown reasons.

Delta canceled our flight and we had to scramble to find another airline to get home. Phoenix is not a delta hub so they didn’t have another plane. It would have been a red eye though Salt Lake City. Getting in at 5am. No bueno.

This flight was no comparison to our prior flight. I'm thinking it all has to do with the age of the aircraft.

This flight was a first class choice and left much to be desired. Seat backs on seats were falling apart and torn. Seats actually didn't come to a "full & upright position". Pull out table was sprung. Not any significant leg room. All in all we were on an obviously older plane and felt overcharged for what we received as first class.

A 12 hour flight during the day with one real meal service - are you kidding? Also the breakfast was one of the worst and not what was listed

Flight was delayed several times. At one point, they "pulled back" 15 minutes from the delayed boarding and sent a text saying we would board sooner than previously advised. The flight then was delayed again. And when we boarded, there was an unspecified technical issue which had us waiting in the plane for about an hour.

Delta is a good airline. I've never had an issue with Delta. I'll continue to fly with them until they show me that I shouldn't.

The only thing nice I can say is the flight crew was really nice and apologetic about the situation. They shared as much information as they had and advised us on what we could do about missing connecting flights. The boarding process was so slow. The gate agent was working by herself and should have had someone working with her. It took almost an hour to board because she was trying to board a full flight of people and provide customer service to everyone who was flying standby and/or had questions. It was really chaotic. This didn't help the fact that we were delayed and folks were missing connections the longer it took.

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!

Our first flight was delayed so we missed our connecting flight. However it was easy to book a later flight on their app.

Perfect flight. Smooth flight. Arrived 20 minutes early at destination. Excellent service.

The flights were on time which was great give. It was holiday travel season and there’d been some weather issues. The only complaint and this is every time with United is the terrible seat design. The head rest is not built for comfort and having my neck bent forward for a cross country trip reminded me while I try not to take United flights as a rule.

I’m so sorry, I can’t remember her name, I believe it was Dimpti. She was stellar, also a mature Asian flight attendant, lots of flowers in her hair, just as amazing! But literally the crew was AWESOME . Only downside is there weren’t any charging outlets. Maybe I needed to ask a flight attendant , but it would’ve been nice to have one easily accessible.

The flight was delayed by two de-icings. The seatbelt did not work correctly. It did not stay tight.

Everything was absolutely wonderful from check in to baggage claim. Staff was very professional and sweet. Will definitely recommend United to family and friends.

Aircraft was noisy, old and never dimmed the lights on a night flight even on business class! I flew 17 times on United and probably another 40 on other airlines United USA /Europe flights were the worst to include luggage delayed once going to europe and once coming back

Check how old the airframe is, some older ones have inoperable seat back entertainment or power.

Sitting on the runway after we land for almost two hours! Not sure if we should blame United or Just Dumpy Vance.

Hotter than Hades in August. Why, why do crews think that in the winter when we are already dressed for cold weather we need a cabin that is 82 degrees. Even the vents were blowing hot air.

Unbelievably poor service from flight attendants. They didn’t even do water service on a four hour flight. Just disrespectful.

Flight cancellations, delays, mass confusion and disorganization! That’s Air Canada for you, nothing new. I would have chosen a different airline if it were an option, and Air Canada continues to prove they don’t care about their customers.

everything was fine. but paying for 1 piece of check-in luggage and denying passengers to board with carry-on luggage which by air line's standards does not fit is not acceptable. when one travels for a longer time one needs to have some essentials

Couldn't fit knees, only 1 toilet working, didn't get anything to drink cause the stewards were not able to get to us

Flight was canceled for a reason they knew hours before but did not mention. Next the gate chnage from 37 to 38 at least 10 times. Ridiculous.

The flight from SFO to YVR was delayed and my bag did not make it to my next flight from YVR to SYD. It took almost 3 days after I landed to get my bag and when I got it, it was filled with dust

Our biggest complaint about Air Canada is that if you don’t like your seat during check-in, there’s a fee to move elsewhere. On our flight from YUL to FFL, we were charged to change seats—just regular seats. What’s maddening is that the plane wasn’t even full; there were even a few people sleeping in the middle row sections (entire rows, completely empty), using them as beds. In my opinion, charging passengers for seat changes is a cash grab by Air Canada. They are definitely not the airline they were back in the day. I suppose they need to gouge the consumer now that they pay their attendants while on ground. One out of 10.

Nothing specific. Cabin temperature was too high for some reason.

It was just fine. I managed to make all my connection too sbut had trouble in Munich with no wheel chair and trouble trying to get help from the airport people to get to the other terminal for my flight. Finally a wonderful lady Amelia, helped me to make my flight connection Timon with zero time to spare.

Over 40 years ago my AC return flight was canceled, during this last summer the same thing happened. AC denied everything Canadian like paying for accommodations and basic necessities. So why would I ever want to fly AC again? This last flight my wife took the return flight had problems and left late, so I guess they are getting better. However I have no faith in this airline so I drove to this last destination! I'll never fly AC again!!!

Great check in process in LA and good service The check in process as well as at the gate is way better in the US versus canada 🇨🇦

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

Information on your arrival and departure airports