HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Keflavik Intl

$559+ 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 12/23. Fares are subject to change and may not be available on all flights or dates of travel.
SAT — KEF
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from San Antonio to Keflavik Intl with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 October 30, 2025.

This Trip.com deal was found by Cheapflights users on 10/30. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/81:06 pmSAT - KEF
2 stops20h 24mMultiple Airlines
Mon 12/157:35 amKEF - SAT
2 stops46h 14mMultiple Airlines
Deal found 10/30$810
This Expedia deal was found by Cheapflights users on 10/30. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/86:00 amSAT - KEF
1 stop18h 15mAlaska Airlines
Mon 12/155:00 pmKEF - SAT
1 stop30h 59mAlaska Airlines
Deal found 10/30$918
This Icelandair deal was found by Cheapflights users on 10/29. 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.
Wed 11/196:50 amSAT - KEF
1 stop17h 25mMultiple Airlines
Wed 11/265:00 pmKEF - SAT
1 stop13h 15mMultiple Airlines
Deal found 10/29$1,066
This Kiwi.com deal was found by Cheapflights users on 10/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/236:45 amSAT - KEF
1 stop17h 20mMultiple Airlines
Thu 1/14:45 pmKEF - SAT
2 stops30h 16mMultiple Airlines
Deal found 10/29$1,181
This Alaska Airlines deal was found by Cheapflights users on 10/29. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/196:32 amSAT - KEF
1 stop17h 43mAlaska Airlines
Wed 11/264:50 pmKEF - SAT
2 stops31h 12mAlaska Airlines
Deal found 10/29$1,239
This Kiwi.com deal was found by Cheapflights users on 10/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/246:45 amSAT - KEF
1 stop17h 20mMultiple Airlines
Fri 1/25:15 pmKEF - SAT
1 stop24h 35mMultiple Airlines
Deal found 10/29$1,250

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 October 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$669
(Finnair)

One-way from

$559
(Kiwi.com)

Popular in

December

Cheapest in

September

Average price

$868
Provider with most accurate pricing for San Antonio-Reykjavik Keflavik Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for San Antonio-Reykjavik Keflavik Intl flights.
Search Deals
From San Antonio to Reykjavik Keflavik Intl
Search Deals
One-way flight from San Antonio to Reykjavik Keflavik Intl
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($191 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($43 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

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 October 30, 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

Thu 1/29

1:08 pm-9:15 am

2 stops38h 07m

Reykjavik Keflavik Intl

Mon 2/2

10:00 am-7:26 pm

2 stops39h 26m

$654

San AntonioReykjavik

SAT - KEF

SATKEF

San Antonio

Tue 3/10

2:39 pm-9:00 am

2 stops37h 21m

Reykjavik Keflavik Intl

Tue 3/17

10:00 am-12:24 am

2 stops43h 24m

$669

San AntonioReykjavik

SAT - KEF

SATKEF

San Antonio

Mon 12/8

7:43 pm-6:05 am

1 stop28h 22m

Reykjavik Keflavik Intl

Mon 12/15

4:55 pm-5:05 pm

2 stops30h 10m

$853

San AntonioReykjavik

SAT - KEF

SATKEF

San Antonio

Mon 12/8

6:00 am-6:15 am

1 stop18h 15m

Reykjavik Keflavik Intl

Mon 12/15

5:00 pm-5:59 pm

1 stop30h 59m

$918

San AntonioReykjavik

SAT - KEF

SATKEF

San Antonio

Tue 3/10

11:00 am-6:05 am

1 stop14h 05m

Reykjavik Keflavik Intl

Tue 3/17

5:00 pm-10:30 pm

1 stop34h 30m

$934

San AntonioReykjavik

SAT - KEF

SATKEF

San Antonio

Sat 3/7

6:45 am-6:05 am

1 stop17h 20m

Reykjavik Keflavik Intl

Thu 3/12

4:55 pm-12:17 am

1 stop12h 22m

$941

San AntonioReykjavik

SAT - KEF

SATKEF

San Antonio

Tue 12/23

11:00 am-6:30 am

1 stop13h 30m

Reykjavik Keflavik Intl

Thu 1/1

5:15 pm-9:25 am

1 stop22h 10m

$1,224

San AntonioReykjavik

SAT - KEF

SATKEF

San Antonio

Wed 11/19

6:32 am-6:15 am

1 stop17h 43m

Reykjavik Keflavik Intl

Wed 11/26

4:50 pm-6:02 pm

2 stops31h 12m

$1,239

San AntonioReykjavik

SAT - KEF

SATKEF

San Antonio

Wed 12/24

6:45 am-6:05 am

1 stop17h 20m

Reykjavik Keflavik Intl

Fri 1/2

5:15 pm-11:50 am

1 stop24h 35m

$1,250

San AntonioReykjavik

SAT - KEF

SATKEF

San Antonio

Sat 3/7

10:45 am-3:25 pm

2 stops22h 40m

Reykjavik Keflavik Intl

Thu 3/12

7:35 am-12:14 am

2 stops21h 39m

$1,259

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/29

Showing 1-10 of 11 results
1
2

Compare providers for flights from San Antonio to Keflavik Intl

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from San Antonio to Keflavik Intl in October.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on San Antonio-Reykjavik Keflavik Intl Airport flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on San Antonio-Reykjavik Keflavik Intl Airport flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from San Antonio-Reykjavik Keflavik Intl Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on San Antonio-Reykjavik Keflavik Intl Airport flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for San Antonio-Reykjavik Keflavik Intl Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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.

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 October 30, 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
7.9
Good
7,993 reviews

Boarding

8.2

Crew

8.5

Overall

7.9

Food

7.3

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Delta
7.9
Good
7,993 reviews
Delta
7.9
Good
7,993 reviews

Boarding

8.2

Crew

8.5

Overall

7.9

Food

7.3

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
KLM
7.7
Good
1,406 reviews
Delta
7.9
Good
7,993 reviews

Boarding

8.2

Crew

8.5

Overall

7.9

Food

7.3

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
United Airlines
7.4
Good
8,998 reviews
Delta
7.9
Good
7,993 reviews

Boarding

8.2

Crew

8.5

Overall

7.9

Food

7.3

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.

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 18h 15m. 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 $746.

  • 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.

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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$474Average$808FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$636Average$970FlexibilityNo cancel feeOn-time69%
DeltaCheapest$746Average$996FlexibilityNo cancel feeOn-timeN/A

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.