$595 Cheap British Airways flights Washington (DCA) to Kos (KGS)

View $595 flight on Thu, Oct 23, 2025Opens in a new window

  • Plan, book, fly with confidence

  • trending down icon

    Be in the know

    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon

    Book smarter

    Save up to 30% on select hotels after you book a flight*
  • one key icon

    Earn twice

    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

$595 Cheap British Airways flights Washington (DCA) to Kos (KGS)

Prices were available within the past 7 days and start at $595 for one-way flights and $811 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

British Airways
Mon, Sep 8 - Mon, Sep 15
DCA
Washington
KGS
Kos
$811 Roundtrip, found 5 days ago
$811
Roundtrip
found 5 days ago
Select British Airways flight, departing Mon, Sep 8 from Washington to Kos, returning Mon, Sep 15, priced at $811 found 5 days ago
British Airways
Fri, Sep 12 - Fri, Sep 26
DCA
Washington
KGS
Kos
$861 Roundtrip, found 4 days ago
$861
Roundtrip
found 4 days ago
Select British Airways flight, departing Fri, Sep 12 from Washington to Kos, returning Fri, Sep 26, priced at $861 found 4 days ago
British Airways
Fri, Sep 12 - Fri, Sep 26
DCA
Washington
KGS
Kos
$961 Roundtrip, found 4 days ago
$961
Roundtrip
found 4 days ago
Select British Airways flight, departing Fri, Sep 12 from Washington to Kos, returning Fri, Sep 26, priced at $961 found 4 days ago
British Airways
Mon, Sep 8 - Mon, Sep 15
DCA
Washington
KGS
Kos
$1,011 Roundtrip, found 5 days ago
$1,011
Roundtrip
found 5 days ago
Select British Airways flight, departing Mon, Sep 8 from Washington to Kos, returning Mon, Sep 15, priced at $1,011 found 5 days ago
British Airways
Fri, Sep 12 - Fri, Sep 26
DCA
Washington
KGS
Kos
$1,061 Roundtrip, found 4 days ago
$1,061
Roundtrip
found 4 days ago
Select British Airways flight, departing Fri, Sep 12 from Washington to Kos, returning Fri, Sep 26, priced at $1,061 found 4 days ago
British Airways
Fri, Aug 29 - Sun, Sep 14
DCA
Washington
KGS
Kos
$1,109 Roundtrip, found 4 days ago
$1,109
Roundtrip
found 4 days ago
Select British Airways flight, departing Fri, Aug 29 from Washington to Kos, returning Sun, Sep 14, priced at $1,109 found 4 days ago
Flights from Washington (DCA) to Kos (KGS)
Origin airport
Ronald Reagan Washington National
Destination airport
Kos Island Intl.
Airlines serving
British Airways
Popular airline
British Airways
Distance
5325 mi

Frequently asked questions

How much is a British Airways flight from Ronald Reagan Washington National Airport (DCA) to Kos Island Intl. Airport (KGS)?
Landing cheap one-way British Airways flights from DCA to KGS from $595 on Expedia is easy — just filter by "Price (lowest to highest)." Or check out our affordable round-trip fares from $811 for your next adventure.**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 DCA to KGS with British Airways?
British Airways flights to Kos are often cheaper in the off-peak months of December and February. Whether you're in search of a one-way or a return ticket, you could score a better deal then.
What is the cheapest time to book flights from Ronald Reagan Washington National Airport (DCA) to Kos Island Intl. Airport (KGS) with British Airways?
Check for British Airways flights from DCA to KGS about one month before you want to leave. The cheapest time to reserve an international flight is generally 18 to 29 days ahead of your travel date when you can save 17% versus booking four to five months in advance. Regardless of itinerary or fare class, the best day of the week to book international airfare is usually Sunday. Friday is often the most expensive. Passengers who book on a Sunday can save 17% on average compared to those who book on a Friday.**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 British Airways fly nonstop from Ronald Reagan Washington National Airport (DCA) to Kos Island Intl. Airport (KGS)?
Enter your dates, press search and select "Nonstop" on Expedia to browse any direct flights from DCA to KGS with British Airways or another carrier.
What is the earliest British Airways flight from DCA to KGS?
Browse British Airways's earliest flights from DCA to KGS by selecting the "Morning" and "Early Morning" filters. Not only will you arrive at your destination sooner, early departures also have a 20% less chance of being 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 British Airways fly into in Kos?
British Airways flights from Ronald Reagan Washington National Airport (DCA) to Kos come in to land at Kos Island Intl. Airport (KGS). This is the main gateway here.
What kind of luggage can I take on a British Airways flight from Ronald Reagan Washington National Airport (DCA) to Kos Island Intl. Airport (KGS)?
For checked luggage, you can bring 1 checked-in bag weighing up to 50 lb with dimensions not exceeding 29 inches x 15 inches x 16 inches. You can also travel with 2 cabin bags on board when flying standard economy from DCA to KGS with British Airways. This carry-on must weigh less than 50 lb and be no larger than 19 inches x 9 inches x 17 inches. Going over these limits can mean additional charges, so read British Airways's baggage allowance guidelines before packing your suitcase.
Why fly with British Airways from DCA to KGS?
With an excellent in-flight experience and top-tier customer service, British Airways is a favorite for many passengers heading from DCA to KGS. What's more, if you're a British Airways Executive Club and One Key™ member booking with Expedia, you could earn OneKeyCash™* on eligible flights on top of your airline miles, which can be spent on future travel.*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 British Airways flight from Ronald Reagan Washington National Airport (DCA) to Kos Island Intl. Airport (KGS)?
In most cases, you can change or cancel your flight, although there may be additional fees if your booking was made more than 24 hours ago. Need to keep your options open? Apply the "No cancel fee" and "Changes included" filters to find flights that won't charge extra if you have to alter your plans. To modify your booking, visit "Trips," select your flight and click on "Manage Booking" for more information.

Explore a world of travel with Expedia

*Available to One Key members.