$724 Cheap Flights from Philadelphia (PHL) to Kirkwall (KOI)

View $724 flight on Thu, Mar 5, 2026Opens in a new window

Popular airlines from Philadelphia Intl. Airport (PHL) to Kirkwall (KOI)

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Cheap Flights from Philadelphia to Kirkwall (PHL-KOI)

Prices were available within the past 7 days and start at $724 for one-way flights and for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frequently asked questions

How much does a flight from Philadelphia Intl. Airport (PHL) to Kirkwall Airport (KOI) cost?
Lock in a cheap one-way flight from $724 or cheap return flight from Philadelphia Intl. Airport (PHL) to Kirkwall Airport (KOI) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Philadelphia Intl. Airport (PHL) to Kirkwall Airport (KOI)?
Planning your getaway for is a great way to save, as it's the cheapest month for flights between PHL and KOI. You'll often find the lowest prices during off-peak months.
What is the cheapest airline that flies from Philadelphia Intl. Airport (PHL) to Kirkwall Airport (KOI)?
Use the filter tool on Expedia to compare airlines and find the most affordable carrier that'll fly you from PHL to KOI. Then, sort your results by "Price (lowest to highest)" to score a good deal.
How many flights per day from Philadelphia Intl. Airport (PHL) to Kirkwall Airport (KOI)?
You'll need to catch a flight with a layover if you're traveling from Philadelphia Intl. Airport (PHL) to Kirkwall Airport (KOI). There are no daily direct flights on this route. However, simply filter your search to include one or two stops to discover an option that works for you.
What day of the week has the most flights from PHL to KOI?
You'll generally find Tuesday the quietest day for flights, while Fridays are often 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 Philadelphia Intl. Airport (PHL) to Kirkwall Airport (KOI)?
To avoid possible delays on the Philadelphia Intl. Airport (PHL) to Kirkwall Airport (KOI) route, aim to travel before 3 PM. Later departures have a 22% higher chance of being 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 Philadelphia Intl. Airport (PHL) to Kirkwall Airport (KOI) last-minute?
Holding off until just before your departure to book a flight from PHL to KOI often results in higher prices. While it's possible to find some last-minute deals, there's no guarantee. Be flexible with your itinerary to maximize your chances of landing a bargain.
Is it cheaper to book a PHL to KOI flight and hotel package?
Booking a PHL to KOI flight and hotel package is generally cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your travels all in one place. Select from our impressive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Philadelphia Intl. Airport (PHL) to Kirkwall Airport (KOI)?
If you reserved your PHL to KOI flight within the last 24 hours, you may be able to cancel or modify it without any fees. Depending on the airline and the type of fare you purchased, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, visit our Customer Service portal if you want more information.

Travel information

Origin airport
Philadelphia Intl.
Destination airport
Kirkwall
Distance
3314 mi

Book with confidence

Philadelphia to Kirkwall Flights

The cheapest times to fly from Philadelphia to Kirkwall

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 Philadelphia to Kirkwall are during the month of . You can find some of the cheapest flights from Philadelphia to Kirkwall with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Philadelphia to Kirkwall

Sunday is one of the best days to book for cheap flights from Philadelphia to Kirkwall: 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 Philadelphia to Kirkwall

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 Philadelphia to Kirkwall in 2025. You can also book with separate airlines for your outbound and return journeys, from $724 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 Philadelphia to Kirkwall 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 Philadelphia to Kirkwall 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.

 

Philadelphia to Kirkwall Flights

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*Available to One Key members.