$608 Cheap Brussels Airlines flights Boston (BOS) to Kos (KGS)

View $608 flight on Thu, Oct 16, 2025Opens in a new window

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$608 Cheap Brussels Airlines flights Boston (BOS) to Kos (KGS)

Prices were available within the past 7 days and start at $608 for one-way flights and $906 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Brussels Airlines
Thu, Aug 14 - Thu, Aug 21
BOS
Boston
KGS
Kos
$906 Roundtrip, found 5 days ago
$906
Roundtrip
found 5 days ago
Select Brussels Airlines flight, departing Thu, Aug 14 from Boston to Kos, returning Thu, Aug 21, priced at $906 found 5 days ago
Flights from Boston (BOS) to Kos (KGS)
Origin airport
Logan Intl.
Destination airport
Kos Island Intl.
Airlines serving
Austrian Airlines, British Airways, Brussels Airlines, Emirates, Lufthansa, Swiss International Air Lines
Popular airline
British Airways
Distance
4927 mi

Frequently asked questions

How much is a Brussels Airlines flight from Logan Intl. Airport (BOS) to Kos Island Intl. Airport (KGS)?
Set the "Price (lowest to highest)" filter on Expedia to find cheap Brussels Airlines round-trip flights from $906 from BOS to KGS. Affordable one-way fares from $608 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.
What is the cheapest month to fly from BOS to KGS with Brussels Airlines?
December is one of the cheapest months to get away to Kos with Brussels Airlines. You could also find fantastic deals on return and one-way fares in February.
What is the cheapest time to book flights from Logan Intl. Airport (BOS) to Kos Island Intl. Airport (KGS) with Brussels Airlines?
To get cheap flights from BOS to KGS with Brussels Airlines, begin searching about one month before your planned departure. You can save 17% when you book your international tickets 18 to 29 days ahead instead of booking four to five months in advance. Another tip? Booking on Sunday can lead to average savings of 17% compared to Friday (the most expensive day).**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.
Does Brussels Airlines fly nonstop from Logan Intl. Airport (BOS) to Kos Island Intl. Airport (KGS)?
Use the "Nonstop" filter when browsing for direct Brussels Airlines flights from BOS to KGS. It's also a great way to compare other airlines servicing the same nonstop route.
What is the earliest Brussels Airlines flight from BOS to KGS?
Search Brussels Airlines's earliest flights from BOS to KGS by using our "Early Morning" and "Morning" filters. Not only will you arrive sooner, early departures are also 20% less likely to be canceled.**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.
What airports does Brussels Airlines fly into in Kos?
Kos Island Intl. Airport (KGS) is the main Kos hub for Brussels Airlines flights from Logan Intl. Airport (BOS).
What kind of luggage can I take on a Brussels Airlines flight from Logan Intl. Airport (BOS) to Kos Island Intl. Airport (KGS)?
With Brussels Airlines, you can fly standard economy from BOS to KGS with a small personal item and 1 cabin bag. Your carry-on bag should be no larger than 21 inches x 15 inches x 9 inches and weigh under 35 lb. Exceeding baggage restrictions may lead to additional charges, so read your airline's latest guidelines before completing your booking.
Why fly with Brussels Airlines from BOS to KGS?
With a rewarding loyalty program, Brussels Airlines is a popular choice for many travelers departing from BOS to KGS. Plus, as a Miles and More and One Key™ member booking through Expedia, you could earn OneKeyCash™* on eligible flights on top of your airline miles.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.
Can I change or cancel my Brussels Airlines flight from Logan Intl. Airport (BOS) to Kos Island Intl. Airport (KGS)?
Changes are usually free within 24 hours of booking, but your airline may add a charge after that. For further details about modifying your flights, head to your "Trips," select your flight and click on "Manage Booking." If you'd like the freedom to change your plans without additional charges, check the "No cancel fee" or "Changes included" filter when organizing your next adventure.

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