$456 Cheap Delta flights Seattle (SEA) to Reykjavik (KEF)

Use the “Price (lowest to highest)” filter on Expedia to find cheap Delta Air Lines round-trip flights from $560 from SEA to KEF. Affordable one-way fares from $456 are also available.**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.

January is one of the least expensive months to jet off to Reykjavik with Delta Air Lines. You could also find fantastic deals on return and one-way tickets in April.

Search for Delta Air Lines flights from SEA to KEF about one month before you want to leave. The most affordable time to reserve an international flight is usually 18 to 29 days ahead of your travel date when you can save 17% versus booking four to five months in advance. No matter your fare class and itinerary, the best day of the week to book international airfare is usually Sunday. Friday can be the most expensive. Travelers 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 figure out if there’s a direct route from SEA to KEF with Delta Air Lines or other carriers, check the “Nonstop” box when searching for flights.

Browse Delta Air Lines’s earliest flights from SEA to KEF by using our “Morning” and “Early Morning” filters. Not only will you arrive at your destination sooner, early departures also experience 20% fewer cancellations.**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.

Delta Air Lines flights from Seattle - Tacoma Intl. Airport (SEA) to Reykjavik arrive at Keflavik Intl. Airport (KEF). This is the main gateway here.

Heading from SEA to KEF with Delta Air Lines means enjoying a host of perks, such as an excellent in-flight experience and a rewarding loyalty program. Plus, when booking through Expedia, One Key™ members can earn OneKeyCash™* to redeem on select future travel purchases. That’s on top of the Delta SkyMiles points you can earn with Delta Air Lines.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

It’s generally possible to modify or cancel your flight, although there may be additional charges if you made your booking more than 24 hours ago. Need flexible options? Use our “Changes included” or “No cancel fee” filter to find flights that won’t charge extra if you need to adjust your plans. To update your booking, go to “Trips,” select your flight and click on “Manage Booking” for further information.