--- title: "Cheap Flights from Philadelphia (PHL) to Kos (KGS)" description: "Cheap Flights from Philadelphia (PHL) to Kos (KGS) start at for one-way and for round trip. Earn your airline miles on top of our rewards!" canonical: "https://www.expedia.ca/lp/flights/phl/kgs/philadelphia-to-kos" language: en-CA market: CA currency: CAD prices_as_of: 2026-11-14T10:03:55Z --- # Cheap Flights from Philadelphia (PHL) to Kos (KGS) ![Ancient ruins with stone columns and scattered trees.](https://images.trvl-media.com/place/6029116/5d492066-2f4a-422d-ae12-8d6e8a7c3977.jpg?impolicy=fcrop&w=1200&h=500&q=medium) ## Popular airlines from Philadelphia International Airport (PHL) to Kos (KGS-Kos Island Intl.) [British Airways](https://www.expedia.ca/Flights-Search?leg1=from:PHL,to:KGS,departure:28/11/2026TANYT&leg2=from:KGS,to:PHL,departure:05/12/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"BA"}}]) [Lufthansa](https://www.expedia.ca/Flights-Search?leg1=from:PHL,to:KGS,departure:28/11/2026TANYT&leg2=from:KGS,to:PHL,departure:05/12/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"LH"}}]) [Swiss International Air Lines](https://www.expedia.ca/Flights-Search?leg1=from:PHL,to:KGS,departure:28/11/2026TANYT&leg2=from:KGS,to:PHL,departure:05/12/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"LX"}}]) [Austrian Airlines](https://www.expedia.ca/Flights-Search?leg1=from:PHL,to:KGS,departure:28/11/2026TANYT&leg2=from:KGS,to:PHL,departure:05/12/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"OS"}}]) ### Be in the know Get alerts if flight prices drop or rise\* ### Book smarter Save up to 30% on select hotels after you book a flight\* ### Earn twice Earn your airline miles on top of our rewards [Sign in](https://www.expedia.ca/login) Find the cheapest flights on Expedia from Philadelphia (PHL) to Kos (KGS). Flight ticket prices change frequently based on availability and demand. We send price‑drop alerts to make air travel simple and flexible. The lowest one-way fare found on Expedia for this route in the past 7 days starts at for travel on . ## Book with confidence ### Philadelphia to Kos Flights #### The easy way to book your flights from Philadelphia to Kos With Expedia, it’s simple to find and book flights to Kos from Philadelphia whether you’re traveling for business or pleasure. Enter your travel dates, hit search, and choose your flight from airlines that cover this route. There are nonstop flights to Kos Island Intl., too. Choose your preferred carrier and cabin class with the advanced search tool and select your ideal departure time. Then, if you want, you can see just nonstop or refundable flights. And if you’re traveling last minute, just enter the date to check out flights from Philadelphia to Kos today, tomorrow, or this week. #### Save dollars with cheap flights from Philadelphia Intl., PHL to Kos Island Intl., KGS Sort your search results by price to find great deals on your flight from Philadelphia to Kos—you get all your cheapest options first. Grab yourself a bargain now—the lowest price on flights to Kos from Philadelphia currently is just rising to . Here are more money-saving tips: - Fly in when flight prices are normally at their lowest - Book about a month to 6 weeks before you travel for the best prices to Kos - Avoid peak season and weekends when flights can cost more - Early morning and late-night flights are sometimes cheaper, so try varying your travel times - One surefire way to save money on your flight is to book your flight and hotel together with Expedia. Sometimes, the savings are so large that the flight is basically free! #### Reasons to choose Expedia for your flight to Kos from Philadelphia Whatever your destination, budget, or reason to travel, in just one quick search, you can choose from loads of flights, airlines, and cabin classes. The filters make it quick and easy to find your ideal flights, and if you choose one of the flexible options, you won’t be charged to change your flight. So book your flight to Kos with Expedia today. ## Frequently Asked Questions ### How much is a flight from Philadelphia Intl. Airport (PHL) to Kos Airport? Start packing your suitcase, because round-trip flights from Philadelphia Intl. Airport (PHL) to KGS start from . That's based on fares advertised within the last 7 days on Expedia for flights departing within the next year. Prices can go up quickly, so book now to score the best deal. Prices and availability are subject to change. Additional terms apply. ### Do I need to pay a cancellation fee if I cancel my flight from PHL to Kos Island Intl. Airport (KGS)? This differs between air carriers, as each one has its own set of terms and conditions. Head to the [Customer Service Portal](https://www.expedia.ca/helpcenter), where there are easy-to-follow instructions on how to cancel your flight online. ### How do I find cheap flights from Philadelphia Intl. Airport (PHL) to Kos Airport that have flexible change policies? Select our "No change fees" filter to find flexible ticketing options for your flight from PHL to Kos Airport. This allows you to secure a fantastic price in advance and still have the freedom to reschedule without any additional fees. You'll just need to pay the difference in fare. ### How far is the flight from Philadelphia Airport to KGS? The distance is around 8,400 kilometres, so pack your carry-on luggage with whatever you need to make the long journey comfortable. Wondering what to take on board your Philadelphia to Kos flight? A sleep mask, earplugs and a neck pillow are a few essentials. ### Which airlines fly direct from Philadelphia Intl. Airport (PHL) to Kos Airport? You won't find any airlines operating directly between Philadelphia Airport and KGS, so be ready to make at least one stop on your journey. A layover can be a welcome way to break up a trip! ### Are Philadelphia Airport to KGS flight tickets cheaper when they're purchased at the last minute? Flight prices go up and down like a yo-yo, so there are no guarantees. While last-minute flight deals between PHL and Kos Airport are of course possible, it's also a good idea to keep an eye on prices well before you fly. In fact, some air carriers publicize their prices up to 12 months before the departure date. Expedia is constantly updating the best airfare bargains around, so keep checking and be ready to pounce when the fares dip. ## Travel information | Origin airport | Philadelphia International Airport | | ------------------- | ---------------------------------------------------------------------------- | | Destination airport | Kos | | Distance | 8,378 km away | | Airlines serving | British Airways, Lufthansa, Swiss International Air Lines, Austrian Airlines | | Popular airline | British Airways | ## Explore a world of travel with Expedia - [Lodging](?equalTargetTab=tab-0) - [Flights](?equalTargetTab=tab-1) - [Packages](?equalTargetTab=tab-2) - [Cars](?equalTargetTab=tab-3) - [Things to do](?equalTargetTab=tab-4) - [Mastichari Hotels](https://www.expedia.ca/Mastichari-Hotels.d6052010.Travel-Guide-Hotels) - [Kardamena Hotels](https://www.expedia.ca/Kardamena-Hotels.d181068.Travel-Guide-Hotels) - [Hotels near Kefalos Beach](https://www.expedia.ca/Kefalos-Beach-Hotels.0-l6107112-0.Travel-Guide-Filter-Hotels) - 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