$607 Cheap Flights from Phoenix (PHX) to Kos (KGS)

View $607 flight on Sun, Jun 7, 2026Opens in a new window

Popular airlines from Phoenix Sky Harbor Intl. Airport (PHX) to Kos (KGS-Kos Island Intl.)

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Cheap Flights from Phoenix to Kos (PHX-KGS)

Prices were available within the past 7 days and start at $607 for one-way flights and $1,019 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Lufthansa
Fri, Sep 11 - Sat, Sep 19
PHX
Phoenix
KGS
Kos
$1,019 Roundtrip, found 1 day ago
$1,019
Roundtrip
found 1 day ago
Select Lufthansa flight, departing Fri, Sep 11 from Phoenix to Kos, returning Sat, Sep 19, priced at $1,019 found 1 day ago
Swiss International Air Lines
Fri, Sep 11 - Sat, Sep 19
PHX
Phoenix
KGS
Kos
$1,020 Roundtrip, found 1 day ago
$1,020
Roundtrip
found 1 day ago
Select Swiss International Air Lines flight, departing Fri, Sep 11 from Phoenix to Kos, returning Sat, Sep 19, priced at $1,020 found 1 day ago
Lufthansa
Fri, Sep 11 - Sat, Sep 19
PHX
Phoenix
KGS
Kos
$1,029 Roundtrip, found 1 day ago
$1,029
Roundtrip
found 1 day ago
Select Lufthansa flight, departing Fri, Sep 11 from Phoenix to Kos, returning Sat, Sep 19, priced at $1,029 found 1 day ago
Lufthansa
Fri, Sep 11 - Sat, Sep 19
PHX
Phoenix
KGS
Kos
$1,031 Roundtrip, found 1 day ago
$1,031
Roundtrip
found 1 day ago
Select Lufthansa flight, departing Fri, Sep 11 from Phoenix to Kos, returning Sat, Sep 19, priced at $1,031 found 1 day ago
Austrian Airlines
Fri, Sep 11 - Sat, Sep 19
PHX
Phoenix
KGS
Kos
$1,040 Roundtrip, found 1 day ago
$1,040
Roundtrip
found 1 day ago
Select Austrian Airlines flight, departing Fri, Sep 11 from Phoenix to Kos, returning Sat, Sep 19, priced at $1,040 found 1 day ago
Lufthansa
Fri, Sep 11 - Sat, Sep 19
PHX
Phoenix
KGS
Kos
$1,046 Roundtrip, found 1 day ago
$1,046
Roundtrip
found 1 day ago
Select Lufthansa flight, departing Fri, Sep 11 from Phoenix to Kos, returning Sat, Sep 19, priced at $1,046 found 1 day ago
Swiss International Air Lines
Fri, Sep 11 - Sat, Sep 19
PHX
Phoenix
KGS
Kos
$1,050 Roundtrip, found 1 day ago
$1,050
Roundtrip
found 1 day ago
Select Swiss International Air Lines flight, departing Fri, Sep 11 from Phoenix to Kos, returning Sat, Sep 19, priced at $1,050 found 1 day ago
Swiss International Air Lines
Fri, Sep 11 - Sat, Sep 19
PHX
Phoenix
KGS
Kos
$1,052 Roundtrip, found 1 day ago
$1,052
Roundtrip
found 1 day ago
Select Swiss International Air Lines flight, departing Fri, Sep 11 from Phoenix to Kos, returning Sat, Sep 19, priced at $1,052 found 1 day ago
Air Canada
Fri, Sep 11 - Sat, Sep 19
PHX
Phoenix
KGS
Kos
$1,115 Roundtrip, found 1 day ago
$1,115
Roundtrip
found 1 day ago
Select Air Canada flight, departing Fri, Sep 11 from Phoenix to Kos, returning Sat, Sep 19, priced at $1,115 found 1 day ago
Brussels Airlines
Fri, Sep 11 - Sat, Sep 19
PHX
Phoenix
KGS
Kos
$1,621 Roundtrip, found 1 day ago
$1,621
Roundtrip
found 1 day ago
Select Brussels Airlines flight, departing Fri, Sep 11 from Phoenix to Kos, returning Sat, Sep 19, priced at $1,621 found 1 day ago

Frequently asked questions

How much does a flight from Sky Harbor Intl. Airport (PHX) to Kos Island Intl. Airport (KGS) cost?
Snag a cheap one-way flight from $607 or cheap return flight from $1,019 from Sky Harbor Intl. Airport (PHX) 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 Sky Harbor Intl. Airport (PHX) to Kos Island Intl. Airport (KGS)?
The cheapest month to fly from PHX to KGS is September, when there's less demand. Off-peak season is often when better flight deals are available between these airports.
What is the cheapest airline that flies from Sky Harbor Intl. Airport (PHX) to Kos Island Intl. Airport (KGS)?
Expedia's filter tool lets you easily compare different airlines, departure times and fares all in one place. Select your preferences, then sort by "Price (lowest to highest)" to find out which carrier offers the cheapest PHX to KGS flight.
How many flights per day from Sky Harbor Intl. Airport (PHX) to Kos Island Intl. Airport (KGS)?
You'll need to catch a flight with a layover when traveling from Sky Harbor Intl. Airport (PHX) to Kos Island Intl. Airport (KGS). There are no daily direct flights on this route. However, just filter your search to include one or more stops to find the best option for your trip.
What day of the week has the most flights from PHX to KGS?
You'll generally find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can vary from season to season and during peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Sky Harbor Intl. Airport (PHX) to Kos Island Intl. Airport (KGS)?
To avoid potential delays on the Sky Harbor Intl. Airport (PHX) to Kos Island Intl. Airport (KGS) route, travel before 3 PM. Departures after this time are 22% more likely to be canceled.**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 Sky Harbor Intl. Airport (PHX) to Kos Island Intl. Airport (KGS) last-minute?
Booking your plane ticket from PHX to KGS just before your getaway is typically more expensive. However, if there's some wiggle room with your travel times and dates, you could snag a cheap last-minute fare.
Is it cheaper to book a PHX to KGS flight and hotel package?
You'll generally save money by securing a PHX to KGS flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's easy to manage it all in one convenient place. Once you've selected your preferred accommodations and flights, consider adding extras including car rentals, tours and activities.
Can I cancel or change the date of my flight from Sky Harbor Intl. Airport (PHX) to Kos Island Intl. Airport (KGS)?
Generally, it's possible to cancel or reschedule your PHX to KGS flight. However, for bookings made more than 24 hours ago, additional charges may apply. Refer to your airline's policies in your itinerary to see what changes are allowed and if any costs are involved. You'll also find more information on our Customer Service portal.

Travel information

Origin airport
Sky Harbor Intl.
Destination airport
Kos Island Intl.
Airlines serving
Austrian Airlines, Brussels Airlines, Lufthansa, Swiss International Air Lines
Roundtrip price
$1,018
Distance
6914 mi

Book with confidence

Phoenix to Kos Flights

The cheapest times to fly from Phoenix 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 Phoenix to Kos are during the month of September. You can find some of the cheapest flights from Phoenix to Kos with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Phoenix to Kos

Sunday is one of the best days to book for cheap flights from Phoenix 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 Phoenix 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 Phoenix to Kos in 2025. You can also book with separate airlines for your outbound and return journeys, from $607 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 Phoenix 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 Phoenix 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.

 

Phoenix to Kos Flights

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*Available to One Key members.