SAT - KEF

$559 Find Cheap Flights from San Antonio to Reykjavik-Keflavik Airport

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from San Antonio to Keflavik Intl departing on 12/23. 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 San Antonio 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 San Antonio to Reykjavik, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$669
Finnair
Tue 3/10Tue 3/17
SAT - KEF • 2 stops
Cheapest one-way
$559
Multiple Airlines
Tue 12/23
SAT - KEF • 1 stop
Top airlines
Finnair
Cheapest • from $669 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
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We hope you love your trip to Keflavik Intl!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from San Antonio to Keflavik Intl (SAT-KEF)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from San Antonio to Keflavik Intl 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 San Antonio to Keflavik Intl

Tue, Mar 10 - Tue, Mar 17
Finnair Logo
2:39 pm - 9:00 amSAT-KEF
37h 21m2 stops
Finnair Logo
10:00 am - 12:24 amKEF-SAT
43h 24m2 stops
$669Finnair
Find Deal
Mon, Dec 8 - Mon, Dec 15
Multiple Airlines Logo
1:06 pm - 3:30 pmSAT-KEF
20h 24m2 stops
Multiple Airlines Logo
7:35 am - 11:49 pmKEF-SAT
46h 14m2 stops
$810Multiple Airlines
Find Deal
Mon, Dec 8 - Mon, Dec 15
Multiple Airlines Logo
7:43 pm - 6:05 amSAT-KEF
28h 22m1 stop
Multiple Airlines Logo
4:55 pm - 5:05 pmKEF-SAT
30h 10m2 stops
$853Multiple Airlines
Find Deal
Mon, Dec 8 - Mon, Dec 15
Multiple Airlines Logo
6:22 pm - 3:30 pmSAT-KEF
39h 08m2 stops
Multiple Airlines Logo
4:20 pm - 2:50 pmKEF-SAT
52h 30m2 stops
$870Multiple Airlines
Find Deal
Mon, Dec 8 - Mon, Dec 15
Alaska Airlines Logo
6:00 am - 6:15 amSAT-KEF
18h 15m1 stop
Alaska Airlines Logo
5:00 pm - 5:59 pmKEF-SAT
30h 59m1 stop
$918Alaska Airlines
Find Deal
Mon, Dec 8 - Mon, Dec 15
Alaska Airlines Logo
6:00 am - 6:15 amSAT-KEF
18h 15m1 stop
Alaska Airlines Logo
5:00 pm - 5:59 pmKEF-SAT
30h 59m1 stop
$923Alaska Airlines
Find Deal
Sat, Mar 7 - Sat, Mar 14
Alaska Airlines Logo
7:00 pm - 5:45 amSAT-KEF
28h 45m1 stop
Alaska Airlines Logo
5:00 pm - 5:58 pmKEF-SAT
29h 58m1 stop
$1,128Alaska Airlines
Find Deal
Sat, Mar 7 - Thu, Mar 12
Scandinavian Airlines Logo
10:45 am - 3:25 pmSAT-KEF
22h 40m2 stops
Scandinavian Airlines Logo
7:35 am - 12:14 amKEF-SAT
21h 39m2 stops
$1,259Scandinavian Airlines
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Wed, Nov 19 - Wed, Nov 26
British Airways Logo
6:05 pm - 5:15 pmSAT-KEF
41h 10m2 stops
British Airways Logo
11:50 am - 11:50 pmKEF-SAT
18h 00m2 stops
$1,698British Airways
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Tue, Nov 18 - Sat, Nov 29
British Airways Logo
2:42 pm - 10:45 amSAT-KEF
38h 03m2 stops
British Airways Logo
11:55 am - 8:51 pmKEF-SAT
38h 56m2 stops
$1,887British Airways
Find Deal
Booking Insights

KAYAK's insights & trends for San Antonio to Keflavik Intl flights

Get data-powered insights and trends into flights from San Antonio to Keflavik Intl to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from San Antonio to Reykjavik-Keflavik Airport?

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 San Antonio to Reykjavik-Keflavik Airport were found on Finnair ($669) and Alaska Airlines ($918).

Which airlines fly non-stop between San Antonio 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 San Antonio to Reykjavik Keflavik Intl Airport.

There are 3 airlines that fly nonstop from San Antonio to Reykjavik Keflavik Intl Airport. They are: Delta, KLM and United Airlines. The cheapest price of all airlines flying this route was found with KLM at $474 for a round-trip flight. On average, the best prices for this route can be found at KLM.

Good to know

Cheapest flight$559
Flight from San Antonio to Reykjavik-Keflavik Airport

When to book flights from San Antonio to Keflavik Intl

Are your dates flexible? Find out the best times to travel from San Antonio to Keflavik Intl 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 San Antonio to Reykjavik-Keflavik Airport flights

  • What is the cheapest flight from San Antonio to Reykjavik Keflavik Intl Airport?

    In the last 3 days, the lowest price for a flight from San Antonio to Reykjavik Keflavik Intl Airport was $559 for a one-way ticket and $669 for a round-trip.

  • Do I need a passport to fly between San Antonio and Reykjavik-Keflavik Airport?

    Yes, you'll most likely have to show a valid passport before boarding the plane in San Antonio and on arrival in Reykjavik-Keflavik Airport.

  • Which airports will I be using when flying from San Antonio to Reykjavik-Keflavik Airport?

    San Antonio and Reykjavik-Keflavik Airport are both served by 1 main airport. You will leave San Antonio from San Antonio and will be arriving at Reykjavik Keflavik Intl.

  • Which aircraft models fly most regularly from San Antonio to Reykjavik-Keflavik Airport?

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

  • Which airline alliances offer flights from San Antonio to Reykjavik-Keflavik Airport?

    Star Alliance, and SkyTeam are the airline alliances operating flights between San Antonio and Reykjavik-Keflavik Airport, with Star Alliance being the most commonly used for this route.

  • Which is the best airline for flights from San Antonio to Reykjavik, Delta or KLM?

    The two airlines most popular with KAYAK users for flights from San Antonio to Reykjavik are Delta and KLM. With an average price for the route of $996 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 $808 and an overall rating of 7.7.

  • How does KAYAK find such low prices on flights from San Antonio to Reykjavik-Keflavik Airport?

    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 San Antonio to Reykjavik-Keflavik Airport.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from San Antonio to Reykjavik-Keflavik Airport?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Reykjavik-Keflavik Airport from San Antonio 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 San Antonio to Reykjavik-Keflavik Airport?

    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-Keflavik Airport with an airline and back to San Antonio with another airline. Booking your flights between San Antonio 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 San Antonio to Reykjavik-Keflavik Airport?

    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-Keflavik Airport from San Antonio up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 3 airlines serving from San Antonio to Keflavik Intl

 
See real verified KAYAK customer reviews for airlines flying from San Antonio 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 San Antonio to Keflavik Intl? 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 7993 reviews
7.9Entertainment
7.9Comfort
7.3Food
8.5Crew
8.2Boarding
Airline reviews

Staff were friendly and happy. Delta could make sure passengers that don't have the app know of changes. Without Kayak I would not have known about the change of gate or the delay. Kayak was faster to notify me.

8.0 ExcellentJulie, Oct 2025LAX - SFO
Read more Delta reviews

Staff were friendly and happy. Delta could make sure passengers that don't have the app know of changes. Without Kayak I would not have known about the change of gate or the delay. Kayak was faster to notify me.

They ended up paying for the bag twice, but the counter wouldn't take my baggage receipt. Left it to me to resolve. Not sure how to resolve the issue.

The customer service before board was very rude and when I expressed my concerns about making the connecting flight she laughed and told me I bought the wrong ticket. I explained once it showed the flight was delayed it no longer let me change seats or anything. I was trying to upgrade to make sure I would get to the next gate on time.

Non stop on long haul is the way to go. Great experience

The aircraft interior is old and tired on this aircraft. The entertainment system never worked despite the crews attempt to reset the system.

The flight used a B767 with a very old interior from before 2014. The entertainment system did not work at all during the flight despite attempts to reset the system. It was like they flew this route just to be competitive.

Old plane and old configuration/seats but still comfortable for a morning flight

They changed planes and the new plane couldn’t carry enough fuel to fly across the country so we had to stop in Kansas City to refuel. Flight was delayed .

Flight was too crowded and seats are too small, especially since passengrs are getting larger. Having a middle seat is ALWAYS tough! Woman on my left was large & kept creeping in to my space. Flight personnel were great! Have more savory rather than sweet snacks please.

Flight was crowded and the woman sitting on my left was large & kept crouching in to my space. You need bigger seats or smaller passengers to fit into the seats you DO have! Snack were OK. Would appreciate if airlines had more savory rather than sweet snacks, thank you!

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.

KLM remains a quality flag carrier airline which maintains its standards whilst all their competitors are lowering theirs.

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

My flight was delayed by 6 hours then I missed BOTH of my connecting flights, I then had to stay in the AIRPORT at JFK because soooooo many people also suffered from missing flights and there was no hotels available. I would like to be compensated for this experience! I had to stay in the airport for over 16 hours!

Klm start boarding while somw air issue in the plan

The service was great. However the lounge only gets passing grade

I appreciate that KLM was proactive in informing me of the 2 hour delay which enabled me to replan my travel. It was a bit stressful not knowing whether my connection from Montreal to Ottawa was happening. But the ground and air crew did a good job at comforting and assuring me.

Cabin crew professional, polite and friendly, boarding was seemless, but come on KLM surely you can do better than a pack of cheesy biscuits as an inflight snack

Lately I like the planes have been exceptionally filthy. There’s lines of dust and dirt all across the ceiling in the vents, and the cracks in between the seats are literally full of food. It’s definitely not the quality of service that I was used to with United. I’m also very disappointed with the Wi-Fi! All I wanna do is knock out a few work jobs while I’m trapped in my seat And it spools so bad. They did provide me with a refund, but the process of getting that refund is so complicated. It’s unfortunate.

Crew was excellent. This was a relatively long flight though and had very little leg room, and no entertainment.

The newer screen was super cool and had the option to watch many different shows or movies. Crew was polite and helpful. However again, many children screaming bloody murder and kicking my seat, and parents doing nothing about it as usual.

Flight was good and crew was super polite. However, there were around 5 kids screaming the WHOLE 2 hours. I understand kids have to come but parents need to do something to control their children. They make the experience terrible, especially after finishing 16 hour shifts at the hospital I needed some sleep, which I did not get.

Plane was crowded and even when we hit altitude, the plane was hot, not enough air flow.

Flight was delayed and missed my connection Lufthansa didn’t respond.

the delay for 3 hours was understandable due to weather conditions but the flight should’ve provided some on flight compensations or at least provide more food.

United could have one single once of customer service. No human United employee would help me with the invalid mileage plus number, they said I had to speak with the computer.

A little bit more leg room in premium economy. I am 6’4”.

Overall it was good. I missed my connection but I was put on another flight.

Everything you need to know for your flight from San Antonio to Keflavik Intl

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