$151 Cheap Aegean flights Oslo (OSL) to Kos (KGS)

Finding cheap one-way Aegean Airlines flights from OSL to KGS from $151 on Expedia couldn't be easier --- just filter by "Price (lowest to highest)." Or check out our budget-friendly return fares from $310 for your next exciting vacation.**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.

Getting the best Aegean Airlines deals from OSL to KGS is typically all about timing. You can save 17% on international flights when you book 18 to 29 days before takeoff instead of four to five months ahead. To top it off, you can pocket 17% on average by buying your tickets on a Sunday rather than a Friday, which is usually the most expensive day to book.* It's smart to kick off your flight search about one month before you want to travel.*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 find the earliest departure from OSL to KGS with Aegean Airlines, filter your results by "Morning" and "Early Morning." Choosing an early flight generally 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.

Aegean Airlines makes flying from OSL to KGS more comfortable with top-tier customer service and a 4-star airline rating. You also have the chance to earn points with Miles+Bonus. Make sure you sign up to Expedia's free One Key™ rewards program to earn OneKeyCash™*, which can be redeemed on future trips.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.