Cheap flights from Boston to Kos from $1,078
This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Boston to Kos departing on 11/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Use the filters below to find and compare flights from Boston to Kos that are best for you.
Fly from
Fly to
Route
Depart
Return
BostonKos
BOS Boston Logan Intl - KGS Kos
BOSKGS
Boston Logan Intl
Tue 11/10
7:50 pm-7:45 am
3 stops28h 55m
Kos
Tue 11/17
2:05 pm-2:40 pm
3 stops31h 35m
BostonKos
BOS Boston Logan Intl - KGS Kos
BOSKGS
Boston Logan Intl
Tue 11/10
3:10 pm-1:35 pm
2 stops15h 25m
Kos
Tue 11/17
8:25 am-8:20 pm
3 stops18h 55m
BostonKos
BOS Boston Logan Intl - KGS Kos
BOSKGS
Boston Logan Intl
Tue 11/10
5:45 am-1:35 pm
2 stops24h 50m
Kos
Tue 11/17
9:45 pm-9:28 pm
2 stops30h 43m
When to book flights from Boston to Kos
Cheap Boston to Kos (BOS to KGS) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Boston to Kos
Frequently asked questions about flying from Boston to Kos
How far is Boston Logan Intl to Kos by plane?
The distance between Boston Logan Intl and Kos is about 4930.9 mi. By plane, this route typically takes 17h 05m.
When did momondo last update prices for flights from Boston Logan Intl Airport to Kos Airport?
Prices for flights from Boston Logan Intl Airport to Kos Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Boston Logan Intl Airport to Kos Airport?
As of October 2026, there is 1 operator available to choose from for flights from Boston Logan Intl Airport to Kos Airport.
How old do you have to be to fly from Boston Logan Intl Airport to Kos Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Boston Logan Intl Airport to Kos Airport.
What documentation or ID do you need to fly to Kos Airport?
The necessary travel and health documents for your Kos Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from Boston to Kos?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Boston to Kos is SWISS (100% of total bookings).
Best airlines flying from Boston to Kos
Compare and see reviews for airlines that fly from Boston to Kos with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $967 | Free Cancellation | Rating 7.5 2,099 reviews |
Frequently asked questions about flying from Boston to Kos
How do I get Price Alerts for flights from Boston to Kos?
Price Alerts will notify you by email when the price for flights to Kos from Boston decreases. To activate this, select your desired travel dates and search for offers. While browsing through offers you’ll see the Price Alert widget toggle. Click it to turn on notifications.
How can I save money on flights from Boston to Kos with momondo?
Leverage our AI within our “Price Forecast” tool, which predicts if it’s better to book now or wait until prices decrease. You can strategically pick the best days to fly and save money on your trip by using our “Price Calendar” tool. “Explore” shows an overview of how much it costs to fly to anywhere from a selected city or airport. Our “Discover” content is a great option for travel inspiration and money-saving tips, while “Price Alerts” will update you when prices change, so you can book when fares are right.
How does momondo find its flight prices?
momondo shows deals across 700+ competitors all at once. momondo is active in 30 international markets, so you can have access to a wide range of options from airlines and OTAs alike.
Traveling to a place near Kos?
Book flights to Kos if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal from Boston to Kos?
To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Kos from Boston.
Can I find flights from Boston to Kos with flexible booking policies on momondo?
Yes. momondo enables you to select and highlight flights to Kos from Boston with this policy.
How can momondo help me find flights from Boston to Kos?
momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Boston to Kos.
I’m not ready to book a flight from Boston to Kos right now. Can momondo alert me if prices change?
If you are not ready to book a flight from Boston to Kos now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Kos and let you know when they change.