Cheap Southwest Airlines flights Philadelphia (PHL) to Reykjavik (KEF)

Set the “Price (lowest to highest)” filter on Expedia to look for cheap Southwest Airlines round-trip flights from PHL to KEF. Affordable one-way options are available as well.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

Southwest Airlines flights to Reykjavik are often cheaper in the quieter months of January and April. Whether you’re searching for a one-way or round-trip ticket, you could find a better deal then.

Search for Southwest Airlines flights from PHL to KEF about one month before you want to go. The most affordable time to book an international flight is generally 18 to 29 days ahead of your departure date when you can save 17% versus booking four to five months in advance. Regardless of fare class and itinerary, the best day to book international airfare is usually Sunday. Friday is often the most expensive. Passengers booking on a Sunday can save 17% on average compared to those who book on a Friday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC’s global airline sales database.

To see if there’s a direct trip from PHL to KEF with Southwest Airlines or any other carriers, check the “Nonstop” box when looking for flights.

To find the earliest departure from PHL to KEF with Southwest Airlines, sort your results by “Early Morning” and “Morning.” Booking an early flight usually means cancellations are less likely.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.

Keflavik Intl. Airport (KEF) is the main Reykjavik gateway for Southwest Airlines flights from Philadelphia Intl. Airport (PHL).

It’s generally possible to change or cancel your flight, although additional fees may apply if you made your booking over 24 hours ago. Need flexible options? Apply the “No cancel fee” or “Changes included” filter to find flights that won’t charge you extra if you need to alter your plans. To make modifications, go to “Trips,” select your flight and click on “Manage Booking” for more information.