Cheap flights from Boston to Kos from $834
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 8/13. 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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How to get the cheapest flight ticket from Boston to Kos
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest day to depart on your flight to Kos?
The cheapest day to depart from Boston to Kos is on a Saturday when prices can be found for as low as $1,035. On the other hand, Monday is the most expensive day to depart from Boston because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $1,398.
What is the cheapest time of day to depart on your flight to Kos?
Flying to Kos from Boston in the evening is the least expensive time of day to depart. momondo users have found prices as low as $1,202 when looking at flights departing in the evening. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $1,219 on average. Flights to Kos from Boston in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.
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
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 13h 40m.
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 June 2025, there are 2 operators 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 Lufthansa (55% of total bookings). The next most popular airline is SWISS (45%).
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 $928 | Free Cancellation | Rating 7.5 1,628 reviews | |||
| PriceFrom $981 | Free Cancellation | Rating 6.8 7,148 reviews |
Traveling to a place near Kos?
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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.