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Cheap flights from Washington to Kos from $1,145

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Washington to Kos departing on 8/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Washington to Kos

Cheap round-trip flights

Enter your travel dates to find the best prices.
Lufthansa Logo
6:50 pm - 8:55 am
SEA
-
KGS
28h 05m
2 stops
Lufthansa Logo
8:35 pm - 11:55 am
KGS
-
SEA
25h 20m
2 stops
$1,145Lufthansa
Sat, Aug 8 - Sat, Aug 15
Lufthansa Logo
2:10 pm - 8:55 am
SEA
-
KGS
32h 45m
1 stop
Lufthansa Logo
8:35 pm - 11:55 am
KGS
-
SEA
25h 20m
2 stops
$1,146Lufthansa
Sat, Aug 8 - Sat, Aug 15
Lufthansa Logo
2:10 pm - 8:55 am
SEA
-
KGS
32h 45m
1 stop
Lufthansa Logo
8:35 pm - 4:59 pm
KGS
-
SEA
30h 24m
1 stop
$1,153Lufthansa
Sat, Aug 8 - Sat, Aug 15
Multiple Airlines Logo
5:50 am - 12:35 am
SEA
-
KGS
32h 45m
3 stops
Multiple Airlines Logo
11:05 pm - 5:10 pm
KGS
-
SEA
28h 05m
2 stops
$1,324Multiple Airlines
Sun, Aug 9 - Sun, Aug 16
Multiple Airlines Logo
3:55 pm - 12:35 am
SEA
-
KGS
22h 40m
2 stops
Multiple Airlines Logo
6:45 pm - 1:45 pm
KGS
-
SEA
29h 00m
3 stops
$1,368Multiple Airlines
Sat, Aug 8 - Sat, Aug 15
Multiple Airlines Logo
8:00 am - 10:30 am
SEA
-
KGS
40h 30m
2 stops
Multiple Airlines Logo
3:15 pm - 6:32 pm
KGS
-
SEA
37h 17m
2 stops
$1,376Multiple Airlines
Sun, Aug 9 - Sun, Aug 16
Multiple Airlines Logo
5:50 am - 10:25 pm
SEA
-
KGS
30h 35m
3 stops
Multiple Airlines Logo
12:35 pm - 11:55 am
KGS
-
SEA
33h 20m
3 stops
$1,385Multiple Airlines
Sat, Aug 8 - Sat, Aug 15
Multiple Airlines Logo
2:10 pm - 9:15 am
SEA
-
KGS
33h 05m
3 stops
Multiple Airlines Logo
10:00 am - 10:40 am
KGS
-
SEA
34h 40m
3 stops
$1,457Multiple Airlines
Sun, Aug 9 - Sun, Aug 16
Multiple Airlines Logo
5:40 pm - 7:05 pm
SEA
-
KGS
15h 25m
1 stop
Multiple Airlines Logo
11:05 pm - 5:10 pm
KGS
-
SEA
28h 05m
2 stops
$1,505Multiple Airlines
Sun, Aug 9 - Sun, Aug 16
Emirates Logo
5:15 pm - 5:30 pm
SEA
-
KGS
38h 15m
2 stops
Emirates Logo
1:05 pm - 1:25 pm
KGS
-
SEA
34h 20m
2 stops
$1,883Emirates
Fri, Aug 28 - Tue, Sep 1

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Emirates flights from State of Washington to Kos

Our best Emirates deals on State of Washington to Kos flight tickets
Emirates
Aug 28
SEA5:15 pmSeattle/Tacoma Intl
38h 15m
2 stops
KGS5:30 pmKos
Sep 1
KGS1:05 pmKos
34h 20m
2 stops
SEA1:25 pmSeattle/Tacoma Intl
$1,883
Emirates
Aug 28
SEA5:15 pmSeattle/Tacoma Intl
38h 15m
2 stops
KGS5:30 pmKos
Sep 1
KGS1:05 pmKos
34h 20m
2 stops
SEA1:25 pmSeattle/Tacoma Intl
$1,884

Lufthansa flights from State of Washington to Kos

Our best Lufthansa deals on State of Washington to Kos flight tickets
Lufthansa
Aug 8
SEA6:50 pmSeattle/Tacoma Intl
28h 05m
2 stops
KGS8:55 amKos
Aug 15
KGS8:35 pmKos
25h 20m
2 stops
SEA11:55 amSeattle/Tacoma Intl
$1,145
Lufthansa
Aug 8
SEA2:10 pmSeattle/Tacoma Intl
32h 45m
1 stop
KGS8:55 amKos
Aug 15
KGS8:35 pmKos
25h 20m
2 stops
SEA11:55 amSeattle/Tacoma Intl
$1,146
Lufthansa
Aug 8
SEA2:10 pmSeattle/Tacoma Intl
32h 45m
1 stop
KGS8:55 amKos
Aug 15
KGS8:35 pmKos
30h 24m
1 stop
SEA4:59 pmSeattle/Tacoma Intl
$1,153

momondo Fare Finder

 
Customize your flight search to find flights from State of 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, momondo users made 832,500 searches. Data last updated June 28, 2026.
Use the filters below to find and compare flights from Washington to Kos that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleKos

SEA - KGS

SEAKGS

Seattle/Tacoma Intl

Sat 8/8

6:50 pm-8:55 am

2 stops28h 05m

Kos

Sat 8/15

8:35 pm-11:55 am

2 stops25h 20m

$1,145

SeattleKos

SEA - KGS

SEAKGS

Seattle/Tacoma Intl

Sat 8/8

2:10 pm-8:55 am

1 stop32h 45m

Kos

Sat 8/15

8:35 pm-11:55 am

2 stops25h 20m

$1,146

SeattleKos

SEA - KGS

SEAKGS

Seattle/Tacoma Intl

Sat 8/8

2:10 pm-8:55 am

1 stop32h 45m

Kos

Sat 8/15

8:35 pm-4:59 pm

1 stop30h 24m

$1,153

SeattleKos

SEA - KGS

SEAKGS

Seattle/Tacoma Intl

Sun 8/9

5:50 am-12:35 am

3 stops32h 45m

Kos

Sun 8/16

11:05 pm-5:10 pm

2 stops28h 05m

$1,324

SeattleKos

SEA - KGS

SEAKGS

Seattle/Tacoma Intl

Sat 8/8

3:55 pm-12:35 am

2 stops22h 40m

Kos

Sat 8/15

6:45 pm-1:45 pm

3 stops29h 00m

$1,368

SeattleKos

SEA - KGS

SEAKGS

Seattle/Tacoma Intl

Sun 8/9

8:00 am-10:30 am

2 stops40h 30m

Kos

Sun 8/16

3:15 pm-6:32 pm

2 stops37h 17m

$1,376

SeattleKos

SEA - KGS

SEAKGS

Seattle/Tacoma Intl

Sat 8/8

5:50 am-10:25 pm

3 stops30h 35m

Kos

Sat 8/15

12:35 pm-11:55 am

3 stops33h 20m

$1,385

SeattleKos

SEA - KGS

SEAKGS

Seattle/Tacoma Intl

Sun 8/9

2:10 pm-9:15 am

3 stops33h 05m

Kos

Sun 8/16

10:00 am-10:40 am

3 stops34h 40m

$1,457
Quickest round-trip

SeattleKos

SEA - KGS

SEAKGS

Seattle/Tacoma Intl

Sun 8/9

5:40 pm-7:05 pm

1 stop15h 25m

Kos

Sun 8/16

11:05 pm-5:10 pm

2 stops28h 05m

$1,505

SeattleKos

SEA - KGS

SEAKGS

Seattle/Tacoma Intl

Fri 8/28

5:15 pm-5:30 pm

2 stops38h 15m

Kos

Tue 9/1

1:05 pm-1:25 pm

2 stops34h 20m

$1,883

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

Cheap State of Washington to Kos flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from State of Washington to Kos

Fastest flight time

32h 45m

Direct flights

None
The fastest flight from State of Washington to Kos takes 32h 45m
There are no direct flights from State of Washington to Kos. There are no popular flight routes from State of Washington to Kos.
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Frequently asked questions about flying from Washington to Kos

  • When did momondo last update prices for flights from Washington to Kos Airport?

    Prices for flights from Washington to Kos Airport were last updated today.

  • How old do you have to be to fly from Washington to Kos Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Washington to Kos Airport.

  • What documentation or ID do you need to fly to Kos Airport?

    The required travel and health documents for your Kos Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Kos Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Frequently asked questions about flying from Washington to Kos

  • How do I get Price Alerts for flights from State of Washington to Kos?

    Confirm your travel details to search for the latest offers for flights from State of Washington to Kos. While browsing offers there will be the option to toggle “Price Alerts”. You’ll then receive updates when prices for the flight route increase or decrease.

  • How can I save money on flights from State of Washington to Kos with momondo?

    Plan your trips smart with the “Price Forecast” feature, which uses flight data to help you pick the best days to fly for the lowest fares. Our “Price Calendar” helps you get the most for your money by showing you when it’s most advantageous to fly. Curate your own travel experiences for less with “Explore”. Expert travel hacks to fuel your next adventure are a click away with “Discover” by momondo. Set up our “Price Alerts” to track fare changes and book when prices are at their lowest point.

  • How does momondo find its flight prices?

    We aggregate our prices from over 700+ competitors from airlines to OTAs. We operate in over 30 markets worldwide to show you a wide range of travel options.

Traveling to a place near Kos?

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

Why use momondo?

Why should I use momondo to find a flight deal from Washington to Kos?

It is quick and easy to find Washington to Kos flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Kos that suits you.

Can I find flights from Washington to Kos with flexible booking policies on momondo?

All flight searches from Washington to Kos on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Washington to Kos?

momondo helps you find the best flight between Washington and Kos by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Washington to Kos right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Kos from Washington. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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