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

Flights from San Juan (SJU) to Reykjavik (KEF)
Origin airport
Luis Munoz Marin Intl.
Destination airport
Keflavik Intl.
Distance
3736 mi

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 . 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 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.

Frequently asked questions

Is it cheaper to buy a plane ticket from Isla Verde Intl. Airport to KEF last minute?
When it comes to booking your flights, being prepared pays off. While you may be able to find a last-minute deal on a SJU to KEF flight, prices usually don’t get cheaper as the departure date nears. Based on flight pricing and demand studies in 2022, we have found that the sweet spot to lock in a domestic flight is between 28 – 35 days ahead. For international flights it’s between three and four months.
What airports do you fly into for Reykjavik from San Juan?
You can zip from San Juan to Reykjavik through both Keflavik Intl. Airport (KEF) and Reykjavik Domestic Airport (RKV). Land at Keflavik Intl. Airport (KEF) and you’ll be roughly 25 mi southwest of the center of Reykjavik. Check in to your new digs and then sample some of the city’s leading sights, such as Hallgrimskirkja and Reykjavik City Hall.
Can I change the date of my flight from Isla Verde Intl. Airport to Keflavik Intl. Airport (KEF)?
It’s a snap to make changes to your SJU to Reykjavík–Keflavík Airport journey yourself. Simply log in to the Expedia Trips portal and hit “change flight.” Look around for new flights and book the one that better suits your plans. You’ll see an estimate of applicable flight change fees. You can also use our Customer Service portal to connect with our Virtual Agent and get answers to your questions.

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*Available to One Key members.