When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Kos Airport?

Prices for flights from Seattle/Tacoma Intl Airport to Kos Airport were last updated today.

How old do you have to be to fly from Seattle/Tacoma Intl Airport to Kos Airport?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Kos Airport.

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

The travel and health documents you'll need for your trip to Kos Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Kos Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$650 Cheap Flights from Seattle to Kos in 2025

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Find the cheapest flights from Seattle to Kos

Round-trip

One-way

Cheap round-trip flights

2:55 pm - 7:05 pmSEA-KGS

18h 10m2 stops

8:30 pm - 6:36 pmKGS-SEA

32h 06m2 stops

$650

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Tue, Oct 7 - Tue, Oct 14

7:35 pm - 10:55 amSEA-KGS

29h 20m3 stops

6:00 am - 5:50 pmKGS-SEA

21h 50m3 stops

$777

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Tue, Oct 7 - Tue, Oct 14

12:30 pm - 9:55 pmSEA-KGS

23h 25m2 stops

5:25 pm - 5:15 pmKGS-SEA

33h 50m3 stops

$891

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Tue, Oct 7 - Tue, Oct 14

7:35 pm - 11:50 amSEA-KGS

30h 15m2 stops

2:50 pm - 5:50 pmKGS-SEA

37h 00m1 stop

$1,486

Find Deal

Tue, Oct 7 - Tue, Oct 14

3:28 pm - 2:30 pmSEA-KGS

37h 02m2 stops

8:30 pm - 11:15 pmKGS-SEA

36h 45m2 stops

$1,614SWISS

Find Deal

Fri, Oct 17 - Tue, Oct 21

4:05 pm - 8:05 pmSEA-KGS

42h 00m2 stops

12:35 pm - 12:35 pmKGS-SEA

34h 00m2 stops

$5,125Emirates

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Sat, Nov 15 - Sat, Nov 22

Fly from

Fly to

Route

Depart

Return

Price

SeattleKos

SEA - KGS

SEAKGS

Seattle/Tacoma Intl

Tue 10/7

2:55 pm-7:05 pm

2 stops18h 10m

Kos

Tue 10/14

8:30 pm-6:36 pm

2 stops32h 06m

$650

SeattleKos

SEA - KGS

SEAKGS

Seattle/Tacoma Intl

Tue 10/7

7:35 pm-10:55 am

3 stops29h 20m

Kos

Tue 10/14

6:00 am-5:50 pm

3 stops21h 50m

$777

SeattleKos

SEA - KGS

SEAKGS

Seattle/Tacoma Intl

Tue 10/7

12:30 pm-9:55 pm

2 stops23h 25m

Kos

Tue 10/14

5:25 pm-5:15 pm

3 stops33h 50m

$891

SeattleKos

SEA - KGS

SEAKGS

Seattle/Tacoma Intl

Tue 10/7

7:35 pm-11:50 am

2 stops30h 15m

Kos

Tue 10/14

2:50 pm-5:50 pm

1 stop37h 00m

$1,486

SeattleKos

SEA - KGS

SEAKGS

Seattle/Tacoma Intl

Fri 10/17

3:28 pm-2:30 pm

2 stops37h 02m

Kos

Tue 10/21

8:30 pm-11:15 pm

2 stops36h 45m

$1,614

SeattleKos

SEA - KGS

SEAKGS

Seattle/Tacoma Intl

Sat 11/15

4:05 pm-8:05 pm

2 stops42h 00m

Kos

Sat 11/22

12:35 pm-12:35 pm

2 stops34h 00m

$5,125

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

How to get the cheapest flight ticket from Seattle to Kos

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to Kos?

The cheapest day to depart from Seattle to Kos is on a Tuesday when prices can be found for as low as $1,160. On the other hand, Wednesday is the most expensive day to depart from Seattle because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $1,232.

What is the cheapest time of day to depart on your flight to Kos?

Flying to Kos from Seattle at noon is the least expensive time of day to depart. momondo users have found prices as low as $1,138 when looking at flights departing at noon. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $1,182 on average. Flights to Kos from Seattle in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

When to book flights from Seattle to Kos

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to Kos according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Seattle to Kos (SEA to KGS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Kos

Direct flights	None

There are no direct flights from Seattle to Kos. There are no popular flight routes from Seattle to Kos.

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How far is Seattle/Tacoma Intl to Kos by plane?
There are 6300.1 mi between Seattle/Tacoma Intl and Kos. In terms of flight time, this usually takes a little over 18h 10m.
When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Kos Airport?
Prices for flights from Seattle/Tacoma Intl Airport to Kos Airport were last updated today.
How old do you have to be to fly from Seattle/Tacoma Intl Airport to Kos Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Kos Airport.
What documentation or ID do you need to fly to Kos Airport?
The travel and health documents you'll need for your trip to Kos Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Kos Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Kardamena

Marmari

Why use momondo?

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

Finding the right flight to Kos from Seattle is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Kos quick and easy, saving you time and money.

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

Flights from Seattle to Kos with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Kos from Seattle.

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

Price alerts on flights to Kos from Seattle are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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Cheap flights from Seattle to Kos from $650

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Kos departing on 10/7. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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How to get the cheapest flight ticket from Seattle to Kos

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to Kos?

What is the cheapest time of day to depart on your flight to Kos?

When to book flights from Seattle to Kos

Cheap Seattle to Kos (SEA to KGS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Kos

Direct flights

How far is Seattle/Tacoma Intl to Kos by plane?

When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Kos Airport?

How old do you have to be to fly from Seattle/Tacoma Intl Airport to Kos Airport?

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

Traveling to a place near Kos?

Why use momondo?

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

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

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

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

An easier way to manage your Kos trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Greece

Airports servicing South Aegean