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Keflavik Intl

$409+ Cheap flights from San Antonio (SAT) to Keflavik Intl (KEF)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/23. Fares are subject to change and may not be available on all flights or dates of travel.
SAT — KEF
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap flight deals from San Antonio to Keflavik Intl

Discover tips and strategies to find the most affordable flight options for your journey from San Antonio (SAT) to Keflavik Intl (KEF). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 11, 2025.

Round-trip from

$699
(Mytrip)

One-way from

$409
(Kiwi.com)

Popular in

October

Cheapest in

April

Average price

$891
From San Antonio to Reykjavik Keflavik Intl
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One-way flight from San Antonio to Reykjavik Keflavik Intl
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Highest demand for flights based on searches. 10% potential increase in price ($109 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($30 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from San Antonio to Keflavik Intl

Cheapest flights from San Antonio to Keflavik Intl
Explore the most affordable flight options available from San Antonio to Keflavik Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

This Mytrip deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/267:35 pmSAT - KEF
2 stops29h 40mMultiple Airlines
Sun 11/25:00 pmKEF - SAT
2 stops31h 30mMultiple Airlines
Deal found 9/11$699
This KLM deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/111:35 amSAT - KEF
1 stop16h 55mKLM
Wed 10/88:45 amKEF - SAT
1 stop18h 57mKLM
Deal found 9/11$748
This Scandinavian Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/132:46 pmSAT - KEF
2 stops27h 09mScandinavian Airlines
Wed 11/197:35 amKEF - SAT
2 stops22h 24mScandinavian Airlines
Deal found 9/10$760
This United Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/236:30 amSAT - KEF
1 stop21h 00mUnited Airlines
Mon 9/299:50 amKEF - SAT
2 stops36h 00mUnited Airlines
Deal found 9/10$849
This Priceline deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/236:30 amSAT - KEF
2 stops20h 40mMultiple Airlines
Sun 9/2812:25 amKEF - SAT
2 stops22h 35mMultiple Airlines
Deal found 9/10$878
This Icelandair deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/155:35 amSAT - KEF
1 stop18h 30mMultiple Airlines
Mon 12/225:00 pmKEF - SAT
1 stop13h 15mMultiple Airlines
Deal found 9/10$921
This Icelandair deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/135:15 amSAT - KEF
1 stop19h 15mMultiple Airlines
Wed 11/195:00 pmKEF - SAT
1 stop34h 10mMultiple Airlines
Deal found 9/10$949

Cheapflights Fare Finder

 
Customize your flight search to find flights from San Antonio to Keflavik Intl that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 11, 2025.
Use the filters below to find and compare flights from San Antonio to Reykjavik Keflavik Intl Airport that are best for you.

Fly from

San Antonio

Fly to

Keflavik Intl

Route

Depart

Return

Price

San AntonioReykjavik

SAT - KEF

SATKEF

San Antonio

Sun 10/26

7:35 pm-6:15 am

2 stops29h 40m

Reykjavik Keflavik Intl

Sun 11/2

5:00 pm-6:30 pm

2 stops31h 30m

$699

San AntonioReykjavik

SAT - KEF

SATKEF

San Antonio

Wed 10/1

11:35 am-9:30 am

1 stop16h 55m

Reykjavik Keflavik Intl

Wed 10/8

8:45 am-3:56 pm

1 stop12h 11m

$748

San AntonioReykjavik

SAT - KEF

SATKEF

San Antonio

Thu 11/13

2:46 pm-11:55 pm

2 stops27h 09m

Reykjavik Keflavik Intl

Wed 11/19

7:35 am-11:59 pm

2 stops22h 24m

$760

San AntonioReykjavik

SAT - KEF

SATKEF

San Antonio

Tue 9/23

1:20 pm-8:10 am

2 stops13h 50m

Reykjavik Keflavik Intl

Mon 9/29

9:50 am-4:50 pm

2 stops36h 00m

$849

San AntonioReykjavik

SAT - KEF

SATKEF

San Antonio

Tue 9/23

6:30 am-8:10 am

2 stops20h 40m

Reykjavik Keflavik Intl

Sun 9/28

12:25 am-6:00 pm

2 stops22h 35m

$878

San AntonioReykjavik

SAT - KEF

SATKEF

San Antonio

Mon 12/15

4:45 pm-6:05 am

2 stops31h 20m

Reykjavik Keflavik Intl

Mon 12/22

5:00 pm-12:15 am

1 stop13h 15m

$937

San AntonioReykjavik

SAT - KEF

SATKEF

San Antonio

Thu 11/13

5:15 am-6:30 am

1 stop19h 15m

Reykjavik Keflavik Intl

Wed 11/19

5:00 pm-9:10 pm

1 stop34h 10m

$949

San AntonioReykjavik

SAT - KEF

SATKEF

San Antonio

Sat 11/22

2:00 pm-10:45 am

2 stops38h 45m

Reykjavik Keflavik Intl

Thu 11/27

11:30 am-10:36 pm

2 stops41h 06m

$962

San AntonioReykjavik

SAT - KEF

SATKEF

San Antonio

Tue 9/23

9:47 pm-8:15 am

2 stops29h 28m

$409

San AntonioReykjavik

SAT - KEF

SATKEF

San Antonio

Wed 2/25

5:00 pm-3:45 pm

2 stops40h 45m

$505

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Showing 1-10 of 18 results
1
2

Best time to book a flight from San Antonio to Keflavik Intl

Have a flexible travel schedule? Discover the best time to fly to Keflavik Intl from San Antonio with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from San Antonio to Reykjavik Keflavik Intl Airport

What is the cheapest month to book a flight from San Antonio to Reykjavik Keflavik Intl Airport?

Currently, November is the cheapest month in which you can book a flight from San Antonio to Reykjavik Keflavik Intl Airport (average of $328). Flying from San Antonio to Reykjavik Keflavik Intl Airport in June is currently the most expensive (average of $655). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

How much does it cost to fly round-trip from San Antonio to Reykjavik Keflavik Intl Airport?

Reviews of airlines servicing Keflavik Intl

Get insights into the airlines that provide service to Keflavik Intl. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Keflavik Intl. Reviews last updated September 11, 2025.
Get a feel of what it's like to fly with Delta, KLM, and United Airlines from San Antonio to Reykjavik Keflavik Intl Airport by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,960 reviews

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,960 reviews
Delta
8.0
Very good
7,960 reviews

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
KLM
7.8
Good
1,385 reviews
Delta
8.0
Very good
7,960 reviews

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,937 reviews
Delta
8.0
Very good
7,960 reviews

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

Find useful and relevant information for your journey from San Antonio to Keflavik Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from San Antonio to Reykjavik Keflavik Intl?

    Most people fly from San Antonio (SAT) if they book a flight from San Antonio to Reykjavik Keflavik Intl. On average, San Antonio has 0 outbound flights to Reykjavik Keflavik Intl per day from 3 airlines. San Antonio is conveniently located just 7.6 mi from San Antonio’s city center.

  • How long is the flight from San Antonio to Reykjavik Keflavik Intl Airport?

    Departing from San Antonio to Reykjavik Keflavik Intl Airport will take you 13h 50m. There are 3975 mi between San Antonio and Reykjavik Keflavik Intl Airport. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from San Antonio to Reykjavik Keflavik Intl Airport round-trip?

    Cheapflights users have booked flights from San Antonio to Reykjavik Keflavik Intl Airport round-trip from $474. Other airlines that can offer you cheap pricing are United Airlines, from $636, and Delta, from $732. KLM is 51% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from San Antonio to Reykjavik Keflavik Intl Airport one-way?

    One-way options have recently been found by users for as low as $505 on Lufthansa. Other airlines that offer cheap prices include United Airlines from $530 and American Airlines from $589 one-way.

  • Can I find deals for flights from San Antonio to Keflavik Intl that include hotel bookings?

    Yes. In addition to deals on San Antonio to Keflavik Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from San Antonio to Keflavik Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Antonio to Keflavik Intl.

  • Can I find deals for business class flights from San Antonio to Keflavik Intl?

    Yes. Cheapflights offers flight deals from San Antonio to Keflavik Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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

    Currently, November is the cheapest month in which you can book a flight from San Antonio to Reykjavik Keflavik Intl Airport (average of $328). Flying from San Antonio to Reykjavik Keflavik Intl Airport in June is currently the most expensive (average of $655). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Reykjavik Keflavik Intl Airport?

Book flights to Reykjavik Keflavik Intl Airport if you plan to visit one of these locations
Keflavik
Hveragerdi

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Top 3 airlines flying from San Antonio to Keflavik Intl

Discover the top 3 airlines that operate flights from San Antonio to Keflavik Intl. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$474Average$808FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$636Average$954FlexibilityNo cancel feeOn-time69%
DeltaCheapest$732Average$981FlexibilityNo cancel feeOn-timeN/A

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