HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Kos

$1,125+ Cheap flights from Washington to Kos (KGS)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/3. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — KGS
Apr 30 — May 71
Wed 4/30
Wed 5/7
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Washington to Kos with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Washington to Kos

Keep the following information in mind while searching for Washington to Kos flight deals. Data was last updated April 25, 2025.

Round-trip from

$1,125
(Mytrip)
From Washington to Kos
Search Deals

Find flight deals from Washington to Kos

Cheapest flights from Washington to Kos
Explore the most affordable flight options available from Washington to Kos. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 25, 2025.

This Lufthansa deal was found by Cheapflights users on 4/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/810:55 amSEA - KGS
2 stops19h 25mMultiple Airlines
Wed 10/157:55 pmKGS - SEA
2 stops26h 00mMultiple Airlines
Deal found 4/24$1,128
This SWISS deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/92:50 pmSEA - KGS
2 stops43h 05mSWISS
Mon 6/1611:00 amKGS - SEA
2 stops44h 11mSWISS
Deal found 4/25$1,673
This Gotogate deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/910:59 pmSEA - KGS
2 stops35h 46mBritish Airways
Mon 6/1610:00 pmKGS - SEA
2 stops28h 37mBritish Airways
Deal found 4/25$4,319

Cheapflights Fare Finder

Customize your flight search to find flights from Washington to Kos that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 25, 2025.
Use the filters below to find and compare flights from Washington to Kos that are best for you.

Fly from

Washington

Fly to

Kos

Route

Depart

Return

Price

SeattleKos

SEA - KGS

SEAKGS

Seattle/Tacoma Intl

Thu 5/8

10:55 am-4:20 pm

2 stops19h 25m

Kos

Wed 10/15

7:55 pm-11:55 am

2 stops26h 00m

$1,128

SeattleKos

SEA - KGS

SEAKGS

Seattle/Tacoma Intl

Mon 6/9

2:50 pm-7:55 pm

2 stops43h 05m

Kos

Mon 6/16

11:00 am-9:11 pm

2 stops44h 11m

$1,673

SeattleKos

SEA - KGS

SEAKGS

Seattle/Tacoma Intl

Mon 6/9

10:59 pm-8:45 pm

2 stops35h 46m

Kos

Mon 6/16

10:00 pm-4:37 pm

2 stops28h 37m

$4,319

SeattleKos

SEA - KGS

SEAKGS

Seattle/Tacoma Intl

Thu 9/4

7:20 am-5:30 pm

2 stops24h 10m

$3,560

SeattleKos

SEA - KGS

SEAKGS

Seattle/Tacoma Intl

Mon 6/9

1:49 pm-12:40 pm

2 stops36h 51m

$3,593

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/24

Best time to book a flight from Washington to Kos

Have a flexible travel schedule? Discover the best time to fly to Kos from Washington with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Washington to Kos

Rainfall in Kos by month

Plan your trip to Kos by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Kos ranges from 0.1 - 6.7 inches per month. January is typically the wettest month, when rainfall can reach 6.7 in. July is typically the driest time to visit Kos when rainfall is around 0.1 in.

Temperature in Kos by month

Plan your trip to Kos by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Kos, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of February, when temperatures are typically at their lowest (around 50.0 F).

Reviews of airlines servicing Kos

Get insights into the airlines that provide service to Kos. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Kos. Reviews last updated April 25, 2025.
Emirates
8.0
Very good
3,208 reviews

Overall

8.0

Entertainment

8.2

Food

7.8

Boarding

8.1

Comfort

8.0

Crew

8.3

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2024

IAD - DXB

Not so good. Flight was departed 2 hours late from DC and we missed our connecting flight from Dubai to Mumbai. Our flight Dubai to Mumbai got delayed by three hours. Once we arrived Bombay airport we didnot get all our luggage bags. We were missing two luggage bags so found out that our those two luggage bags are coming in different flight. First they gave us wrong flight information in which our missing luggage coming and wrong phone number to whom we should reach out. I spent hours and hours at the airport to find out our luggage bags. After four five hours later and hectic time at the airport to get our luggage bags. Overall poor communication with emirates staff at the airport and no one is helpful.
Emirates
8.0
Very good
3,208 reviews
Emirates
8.0
Very good
3,208 reviews

Overall

8.0

Entertainment

8.2

Food

7.8

Boarding

8.1

Comfort

8.0

Crew

8.3

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2024

IAD - DXB

Not so good. Flight was departed 2 hours late from DC and we missed our connecting flight from Dubai to Mumbai. Our flight Dubai to Mumbai got delayed by three hours. Once we arrived Bombay airport we didnot get all our luggage bags. We were missing two luggage bags so found out that our those two luggage bags are coming in different flight. First they gave us wrong flight information in which our missing luggage coming and wrong phone number to whom we should reach out. I spent hours and hours at the airport to find out our luggage bags. After four five hours later and hectic time at the airport to get our luggage bags. Overall poor communication with emirates staff at the airport and no one is helpful.
SWISS
7.5
Good
1,582 reviews
Emirates
8.0
Very good
3,208 reviews

Overall

8.0

Entertainment

8.2

Food

7.8

Boarding

8.1

Comfort

8.0

Crew

8.3

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2024

IAD - DXB

Not so good. Flight was departed 2 hours late from DC and we missed our connecting flight from Dubai to Mumbai. Our flight Dubai to Mumbai got delayed by three hours. Once we arrived Bombay airport we didnot get all our luggage bags. We were missing two luggage bags so found out that our those two luggage bags are coming in different flight. First they gave us wrong flight information in which our missing luggage coming and wrong phone number to whom we should reach out. I spent hours and hours at the airport to find out our luggage bags. After four five hours later and hectic time at the airport to get our luggage bags. Overall poor communication with emirates staff at the airport and no one is helpful.

Related info for your journey

Find useful and relevant information for your journey from Washington to Kos. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Kos from Washington?

    Located just 12.8 mi from the city center, Kos (KGS) is the airport most travelers will use when flying to Kos from Washington.

  • Can I find deals for flights from Washington to Kos that include hotel bookings?

    Yes. In addition to deals on Washington to Kos flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Washington to Kos?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington to Kos.

  • Can I find deals for business class flights from Washington to Kos?

    Yes. Cheapflights offers flight deals from Washington to Kos by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Traveling to a place near Washington?

Book flights to Washington if you plan to visit one of these locations
Kardamena

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Washington to Kos

See prices for flight routes from nearby airports that may be better suited for you.
John F Kennedy Intl to Mykonos flights
John F Kennedy Intl to Santorini flights
Newark to Mykonos flights
Newark to Santorini flights
Seattle to Santorini flights
LaGuardia to Mykonos flights
John F Kennedy Intl to Rhodes flights
Newark to Rhodes flights
LaGuardia to Santorini flights
LaGuardia to Rhodes flights
Los Angeles to Santorini flights
Dallas/Fort Worth to Mykonos flights
John F Kennedy Intl to Kos flights
O'Hare Intl to Santorini flights
Dallas/Fort Worth to Santorini flights
Hobby to Santorini flights
Boston to Santorini flights
Newark to Kos flights
O'Hare Intl to Mykonos flights
Dulles Intl to Santorini flights
Miami to Mykonos flights
Dulles Intl to Mykonos flights
Boston to Mykonos flights
Reagan-National to Santorini flights
George Bush Intcntl to Santorini flights
Los Angeles to Mykonos flights
Miami to Santorini flights
San Francisco to Santorini flights
Baltimore to Santorini flights
Baltimore to Mykonos flights
Philadelphia to Mykonos flights
Cincinnati to Santorini flights
Seattle to Mykonos flights
San Francisco to Mykonos flights
Reagan-National to Mykonos flights
Philadelphia to Santorini flights
Atlanta to Santorini flights
O'Hare Intl to Rhodes flights
Detroit to Santorini flights
New Orleans to Santorini flights
Sky Harbor Intl to Santorini flights
LaGuardia to Kos flights
Detroit to Mykonos flights
Hobby to Mykonos flights
Seattle to Paleochori flights
Dulles Intl to Rhodes flights
San Diego to Santorini flights
Newark to Parikia flights
Minneapolis to Santorini flights
John F Kennedy Intl to Parikia flights

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.