$1,003 Cheap Flights from Baltimore (BWI) to Kos (KGS)

View $1,003 flight on Wed, Aug 5, 2026Opens in a new window

Popular airlines from Baltimore Washington Intl. Airport (BWI) to Kos (KGS-Kos Island Intl.)

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Cheap Flights from Baltimore to Kos (BWI-KGS)

Prices were available within the past 7 days and start at $1,003 for one-way flights and $1,440 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

British Airways
Sun, Aug 23 - Mon, Sep 7
BWI
Baltimore
KGS
Kos
$1,440 Roundtrip, found 3 days ago
$1,440
Roundtrip
found 3 days ago
Select British Airways flight, departing Sun, Aug 23 from Baltimore to Kos, returning Mon, Sep 7, priced at $1,440 found 3 days ago
British Airways
Sun, Aug 23 - Mon, Sep 7
BWI
Baltimore
KGS
Kos
$1,444 Roundtrip, found 3 days ago
$1,444
Roundtrip
found 3 days ago
Select British Airways flight, departing Sun, Aug 23 from Baltimore to Kos, returning Mon, Sep 7, priced at $1,444 found 3 days ago
British Airways
Sun, Aug 23 - Mon, Sep 7
BWI
Baltimore
KGS
Kos
$1,450 Roundtrip, found 3 days ago
$1,450
Roundtrip
found 3 days ago
Select British Airways flight, departing Sun, Aug 23 from Baltimore to Kos, returning Mon, Sep 7, priced at $1,450 found 3 days ago
British Airways
Sun, Aug 23 - Mon, Sep 7
BWI
Baltimore
KGS
Kos
$1,454 Roundtrip, found 3 days ago
$1,454
Roundtrip
found 3 days ago
Select British Airways flight, departing Sun, Aug 23 from Baltimore to Kos, returning Mon, Sep 7, priced at $1,454 found 3 days ago
British Airways
Wed, Aug 5 - Mon, Aug 17
BWI
Baltimore
KGS
Kos
$1,669 Roundtrip, found 7 hours ago
$1,669
Roundtrip
found 7 hours ago
Select British Airways flight, departing Wed, Aug 5 from Baltimore to Kos, returning Mon, Aug 17, priced at $1,669 found 7 hours ago
British Airways
Wed, Aug 5 - Mon, Aug 17
BWI
Baltimore
KGS
Kos
$1,674 Roundtrip, found 7 hours ago
$1,674
Roundtrip
found 7 hours ago
Select British Airways flight, departing Wed, Aug 5 from Baltimore to Kos, returning Mon, Aug 17, priced at $1,674 found 7 hours ago
British Airways
Wed, Aug 5 - Mon, Aug 17
BWI
Baltimore
KGS
Kos
$1,844 Roundtrip, found 7 hours ago
$1,844
Roundtrip
found 7 hours ago
Select British Airways flight, departing Wed, Aug 5 from Baltimore to Kos, returning Mon, Aug 17, priced at $1,844 found 7 hours ago
United
Thu, Jun 18 - Tue, Jun 30
BWI
Baltimore
KGS
Kos
$1,906 Roundtrip, found 1 day ago
$1,906
Roundtrip
found 1 day ago
Select United flight, departing Thu, Jun 18 from Baltimore to Kos, returning Tue, Jun 30, priced at $1,906 found 1 day ago
American Airlines
Sat, Jun 20 - Mon, Jul 6
BWI
Baltimore
KGS
Kos
$2,138 Roundtrip, found 2 hours ago
$2,138
Roundtrip
found 2 hours ago
Select American Airlines flight, departing Sat, Jun 20 from Baltimore to Kos, returning Mon, Jul 6, priced at $2,138 found 2 hours ago
Finnair
Thu, Jul 2 - Mon, Aug 3
BWI
Baltimore
KGS
Kos
$2,201 Roundtrip, found 7 hours ago
$2,201
Roundtrip
found 7 hours ago
Select Finnair flight, departing Thu, Jul 2 from Baltimore to Kos, returning Mon, Aug 3, priced at $2,201 found 7 hours ago

Frequently asked questions

How much does a flight from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Kos Island Intl. Airport (KGS) cost?
Snag a cheap one-way flight from $1,003 or cheap return flight from $1,440 from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Kos Island Intl. Airport (KGS) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Kos Island Intl. Airport (KGS)?
The cheapest month to fly from BWI to KGS is August, when demand is low. Off-peak season is usually when you'll find cheap fares for travel between these airports.
What is the cheapest airline that flies from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Kos Island Intl. Airport (KGS)?
Expedia's filter tool lets you easily compare travel time, airlines and fares all in one place. Choose your preferences, then sort by "Price (lowest to highest)" to find the carrier with the cheapest BWI to KGS flight.
How many flights per day from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Kos Island Intl. Airport (KGS)?
You'll have to take a flight with a layover when traveling from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Kos Island Intl. Airport (KGS). Direct flights don't operate daily on this route. However, just filter your search to include one or two stops to discover an option that works for you.
What day of the week has the most flights from BWI to KGS?
Generally you'll find the greatest selection of flight options on a Friday. Tuesdays tend to be the quietest.* However, this can vary depending on the season, carrier and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Kos Island Intl. Airport (KGS)?
To arrive at Kos Island Intl. Airport (KGS) without delays, book a flight that leaves Baltimore Washington Intl. Thurgood Marshall Airport (BWI) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this hour.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Kos Island Intl. Airport (KGS) last-minute?
Last-minute bookings from BWI to KGS are typically more expensive. To secure the cheapest rates, start searching for flights as soon as possible. That said, if your travel plans are flexible, you may find a cheap fare right before your trip.
Is it cheaper to book a BWI to KGS flight and hotel package?
Compared with arranging hotels and flights separately, booking a BWI to KGS flight and hotel package with Expedia could result in significant savings. Better still, having it all in one place will take the hassle out of planning your trip. Just secure your flights and select from our wide range of stays, then personalize your trip with extras like car rentals and activities.
Can I cancel or change the date of my flight from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Kos Island Intl. Airport (KGS)?
In most instances, you can modify or cancel your BWI to KGS flight. However, there may be additional charges, especially if you booked more than 24 hours ago. Check your itinerary for the airline's fees and guidelines on flight changes, or if you'd like further information, head to our Customer Service portal.

Travel information

Origin airport
Baltimore Washington Intl. Thurgood Marshall
Destination airport
Kos Island Intl.
Airlines serving
British Airways
Roundtrip price
$1,439
Distance
5296 mi

Book with confidence

Baltimore to Kos Flights

The cheapest times to fly from Baltimore to Kos

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Baltimore to Kos are during the month of August. You can find some of the cheapest flights from Baltimore to Kos with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Baltimore to Kos

Sunday is one of the best days to book for cheap flights from Baltimore to Kos: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Baltimore to Kos

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Baltimore to Kos in 2026. You can also book with separate airlines for your outbound and return journeys, from $1,003 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Baltimore to Kos flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Baltimore to Kos airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Baltimore to Kos Flights

*Flight schedules are subject to change.

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*Available to One Key members.