$398 Cheap Flights from San Juan (SJU) to Reykjavik (KEF)

View $398 flight on Thu, Jan 22, 2026Opens in a new window

Popular airlines from Luis Munoz Marin Intl. Airport (SJU) to Reykjavik–Keflavik Intl. Airport (KEF)

Cheap Flights from San Juan to Reykjavik (SJU-KEF)

Prices were available within the past 7 days and start at $398 for one-way flights and $469 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Fri, Jan 23 - Fri, Jan 30
SJU
San Juan
KEF
Reykjavik
$469 Roundtrip, found 4 hours ago
$469
Roundtrip
found 4 hours ago
Select United flight, departing Fri, Jan 23 from San Juan to Reykjavik, returning Fri, Jan 30, priced at $469 found 4 hours ago
United
Fri, Jan 23 - Fri, Jan 30
SJU
San Juan
KEF
Reykjavik
$470 Roundtrip, found 4 hours ago
$470
Roundtrip
found 4 hours ago
Select United flight, departing Fri, Jan 23 from San Juan to Reykjavik, returning Fri, Jan 30, priced at $470 found 4 hours ago
Lufthansa
Thu, Jan 15 - Fri, Jan 23
SJU
San Juan
KEF
Reykjavik
$520 Roundtrip, found 2 days ago
$520
Roundtrip
found 2 days ago
Select Lufthansa flight, departing Thu, Jan 15 from San Juan to Reykjavik, returning Fri, Jan 23, priced at $520 found 2 days ago
Lufthansa
Thu, Jan 15 - Fri, Jan 23
SJU
San Juan
KEF
Reykjavik
$526 Roundtrip, found 2 days ago
$526
Roundtrip
found 2 days ago
Select Lufthansa flight, departing Thu, Jan 15 from San Juan to Reykjavik, returning Fri, Jan 23, priced at $526 found 2 days ago
Lufthansa
Thu, Jan 15 - Fri, Jan 23
SJU
San Juan
KEF
Reykjavik
$528 Roundtrip, found 2 days ago
$528
Roundtrip
found 2 days ago
Select Lufthansa flight, departing Thu, Jan 15 from San Juan to Reykjavik, returning Fri, Jan 23, priced at $528 found 2 days ago
Lufthansa
Thu, Jan 15 - Fri, Jan 23
SJU
San Juan
KEF
Reykjavik
$532 Roundtrip, found 2 days ago
$532
Roundtrip
found 2 days ago
Select Lufthansa flight, departing Thu, Jan 15 from San Juan to Reykjavik, returning Fri, Jan 23, priced at $532 found 2 days ago
United
Thu, Jan 15 - Sun, Jan 25
SJU
San Juan
KEF
Reykjavik
$532 Roundtrip, found 22 hours ago
$532
Roundtrip
found 22 hours ago
Select United flight, departing Thu, Jan 15 from San Juan to Reykjavik, returning Sun, Jan 25, priced at $532 found 22 hours ago
Delta
Mon, Apr 20 - Fri, May 1
SJU
San Juan
KEF
Reykjavik
$548 Roundtrip, found 10 hours ago
$548
Roundtrip
found 10 hours ago
Select Delta flight, departing Mon, Apr 20 from San Juan to Reykjavik, returning Fri, May 1, priced at $548 found 10 hours ago
KLM
Sun, Apr 26 - Sun, May 3
SJU
San Juan
KEF
Reykjavik
$650 Roundtrip, found 1 day ago
$650
Roundtrip
found 1 day ago
Select KLM flight, departing Sun, Apr 26 from San Juan to Reykjavik, returning Sun, May 3, priced at $650 found 1 day ago
Virgin Atlantic
Mon, Apr 20 - Tue, Apr 28
SJU
San Juan
KEF
Reykjavik
$673 Roundtrip, found 7 hours ago
$673
Roundtrip
found 7 hours ago
Select Virgin Atlantic flight, departing Mon, Apr 20 from San Juan to Reykjavik, returning Tue, Apr 28, priced at $673 found 7 hours ago

Find the cheapest month to fly from San Juan (SJU) to Reykjavik (KEF)

April is typically the cheapest month to fly

From $500 - $1,708 per traveler.

Alternative airports near Reykjavik

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Keflavik Intl. KEF. Cheapest option available. Average driving time to city center is 45 minutes. Flights from $934
KEF
Keflavik Intl.
Cheapest
Average driving time to city center45 min
Flights from $934

Frequently asked questions

How much does a flight from Luis Munoz Marin Intl. Airport (SJU) to Keflavik Intl. Airport (KEF) cost?
Grab a cheap one-way flight from $398 or cheap return flight from $469 from Luis Munoz Marin Intl. Airport (SJU) to Keflavik Intl. Airport (KEF) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Luis Munoz Marin Intl. Airport (SJU) to Keflavik Intl. Airport (KEF)?
Traveling in January is a good way to save, as it's the cheapest month for flights between SJU and KEF. You'll usually find the lowest prices during off-peak months.
What is the cheapest airline that flies from Luis Munoz Marin Intl. Airport (SJU) to Keflavik Intl. Airport (KEF)?
Expedia's filter tool lets you easily compare different airlines, flight durations and fares all in one place. Select your preferences, then sort by "Price (lowest to highest)" to see which carrier offers the cheapest SJU to KEF flight.
How many flights per day from Luis Munoz Marin Intl. Airport (SJU) to Keflavik Intl. Airport (KEF)?
There aren't any daily direct flights departing from Luis Munoz Marin Intl. Airport (SJU) to Keflavik Intl. Airport (KEF). But you can opt for flights with layovers. Filter your search on Expedia to include one or more stops, and you'll be on your way in no time.
What day of the week has the most flights from SJU to KEF?
Usually you'll find the largest variety of flight choices on a Friday. Tuesdays tend to be the quietest.* However, this can vary depending on the season, carrier and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Luis Munoz Marin Intl. Airport (SJU) to Keflavik Intl. Airport (KEF)?
To arrive at Keflavik Intl. Airport (KEF) on schedule, book a flight that takes off from Luis Munoz Marin Intl. Airport (SJU) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this hour.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Luis Munoz Marin Intl. Airport (SJU) to Keflavik Intl. Airport (KEF) last-minute?
Booking your plane ticket from SJU to KEF just before your trip is typically more expensive. But if there's some wiggle room with your travel times and dates, you could snag a cheap last-minute fare.
Is it cheaper to book a SJU to KEF flight and hotel package?
Compared with arranging hotels and flights separately, booking a SJU to KEF flight and hotel package with Expedia could result in significant savings. Better yet, having it all in one place will take the hassle out of travel planning. Just pick your flights and choose from our extensive range of hotels, then personalize your trip with extras like activities and car rentals.
Can I cancel or change the date of my flight from Luis Munoz Marin Intl. Airport (SJU) to Keflavik Intl. Airport (KEF)?
Usually, it's possible to reschedule or cancel your SJU to KEF flight. However, if the booking was made more than 24 hours ago, additional charges may apply. Check your airline's policies in your itinerary to see what changes are allowed and if any costs are involved. You'll also find more information on our Customer Service portal.

Travel information

Origin airport
Luis Munoz Marin Intl.
Destination airport
Keflavik Intl.
Airlines serving
Air Canada, Air France, American Airlines, British Airways, Delta, Finnair, Icelandair, KLM, Lufthansa, United, Virgin Atlantic
Roundtrip price
$468
Distance
3736 mi

Book with confidence

San Juan to Reykjavik Flights

The cheapest times to fly from San Juan to Reykjavik

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from San Juan to Reykjavik are during the month of January. You can find some of the cheapest flights from San Juan to Reykjavik with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from San Juan to Reykjavik

Sunday is one of the best days to book for cheap flights from San Juan to Reykjavik: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from San Juan to Reykjavik

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from San Juan to Reykjavik in 2025. You can also book with separate airlines for your outbound and return journeys, from $398 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap San Juan to Reykjavik flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your San Juan to Reykjavik airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

San Juan to Reykjavik Flights

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*Available to One Key members.