733 € Cheap Flights from Boston Logan International to Kos

Compare Boston Logan International to Kos flight deals

Find the cheapest month or even day of the year to fly to Kos

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Flight deals from Boston Logan International to Kos

Looking for a cheap last-minute deal or the best return flight from Boston Logan International Airport to Kos Airport? If you want to travel next month, return fares start from 802 €. Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from Boston Logan International to Kos

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Boston Logan International to Kos flights are currently cheapest in July.

Boston to Kos: Flight information

The things to know before you go.
Cheapest flight found733 €
Cheapest month to flyJuly

Finding cheap flights from Boston Logan International to Kos: Frequently asked questions

The best price we found for a return flight from Boston Logan International to Kos is 733 €. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from Boston Logan International to Kos. But we found flights with one or more stops from 733 €.
As of June 2026, there are no flights flying from Boston Logan International to Kos.
The cheapest month to fly from Boston Logan International to Kos is usually July.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Boston Logan International Airport to Kos Airport on Saturday, 4 July 2026.
No airlines currently offer direct flights between Boston Logan International Airport and Kos Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Kos but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Kos is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Frontier Airlines offers the cheapest flight tickets to Kos.

Flying from Logan International Airport (BOS) to Kos Airport (KGS): what you need to know

  • For a smooth journey, turn up at the airport two hours ahead of international flights and an hour before domestic departures. This will give you enough time to catch your BOS to KGS flight.

  • Delays at check-in and security are more likely if you're travelling during high season, so give yourself a bit more breathing room. A good rule of thumb for peak periods? Get there up to four hours early for international flights and at least two hours for domestic departures.

  • Consider adding a stopover when booking your ticket from Logan International Airport to Kos Airport. Simply uncheck 'Direct flights only' to break up your journey, or even explore someplace new along the way. Here are some options between BOS and KGS:

    • Frankfurt Airport

    • Amsterdam Airport Schiphol

    • Zurich Airport

How to find the cheapest flights from Logan International Airport (BOS) to Kos Airport (KGS)

  • Right now, 419 € is the lowest price we've found for a one-way Logan International Airport to Kos Airport flight. The best price for a return ticket is 733 €. Bear in mind that fares can change due to demand when booking.

  • It's usually best to book in advance if you want to get cheap tickets from BOS to KGS. That's because flight prices are based on demand, which tends to increase closer to the date of departure.

  • Finding cheap flights from Logan International Airport to Kos Airport is more likely if you can be flexible with your travel dates. Use the 'Whole month' search tool to see the lowest prices across every month and score a great deal.

  • Picking up cheap flights from BOS to KGS couldn't be easier with Price Alerts. All you need to do is set up one of these automatic alerts and we'll get in touch when a new discounted fare appears.

  • Lock in the perfect flight for you by using the filters. To see the 'Fastest,' 'Cheapest' or 'Best' flights from Logan International Airport to Kos Airport, use the 'Sort by' tool. You can also filter results by airline, arrival and departure times, and journey duration.

Handy information about Logan International Airport (BOS)

  • BOS is located at One Harborside Drive.

  • Of all flights departing from Logan International Airport, 73.94% arrive as scheduled at their destination.

  • Logan International Airport is about 5 kilometres from central Boston. If you're catching a cab, ride-sharing or driving from the centre, it'll take you 10 minutes or so to get there, depending on the traffic.

  • The trip when using public transport typically takes 25 minutes.

  • Need a convenient hotel close to BOS? If you're boarding an early flight from Logan International Airport to Kos Airport, these accommodation options will have you moments from check-in:

Arriving at Kos Airport (KGS)

  • Lock in the best deal by reserving your vehicle from Kos Airport around three weeks before your travel date.

Prices shown on this page are estimated lowest prices only. Found in the last 12 days.