$666 Cheap Flights from Seattle (SEA) to Kirkwall (KOI)

View $666 flight on Sun, Dec 7, 2025Opens in a new window

Popular airlines from Seattle-Tacoma International Airport (SEA) to Kirkwall (KOI)

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Cheap Flights from Seattle to Kirkwall (SEA-KOI)

Prices were available within the past 7 days and start at $666 for one-way flights and $980 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Turkish Airlines
Mon, Apr 20 - Wed, Apr 29
SEA
Seattle
KOI
Kirkwall
$980 Roundtrip, found 6 hours ago
$980
Roundtrip
found 6 hours ago
Select Turkish Airlines flight, departing Mon, Apr 20 from Seattle to Kirkwall, returning Wed, Apr 29, priced at $980 found 6 hours ago
Icelandair
Mon, Apr 20 - Wed, Apr 29
SEA
Seattle
KOI
Kirkwall
$1,006 Roundtrip, found 6 hours ago
$1,006
Roundtrip
found 6 hours ago
Select Icelandair flight, departing Mon, Apr 20 from Seattle to Kirkwall, returning Wed, Apr 29, priced at $1,006 found 6 hours ago
British Airways
Sun, Dec 7 - Sun, Dec 14
SEA
Seattle
KOI
Kirkwall
$1,016 Roundtrip, found 5 days ago
$1,016
Roundtrip
found 5 days ago
Select British Airways flight, departing Sun, Dec 7 from Seattle to Kirkwall, returning Sun, Dec 14, priced at $1,016 found 5 days ago
British Airways
Sun, Dec 7 - Sun, Dec 14
SEA
Seattle
KOI
Kirkwall
$1,026 Roundtrip, found 5 days ago
$1,026
Roundtrip
found 5 days ago
Select British Airways flight, departing Sun, Dec 7 from Seattle to Kirkwall, returning Sun, Dec 14, priced at $1,026 found 5 days ago
Turkish Airlines
Sun, Dec 7 - Sun, Dec 14
SEA
Seattle
KOI
Kirkwall
$1,043 Roundtrip, found 5 days ago
$1,043
Roundtrip
found 5 days ago
Select Turkish Airlines flight, departing Sun, Dec 7 from Seattle to Kirkwall, returning Sun, Dec 14, priced at $1,043 found 5 days ago
British Airways
Sun, Dec 7 - Sun, Dec 14
SEA
Seattle
KOI
Kirkwall
$1,076 Roundtrip, found 5 days ago
$1,076
Roundtrip
found 5 days ago
Select British Airways flight, departing Sun, Dec 7 from Seattle to Kirkwall, returning Sun, Dec 14, priced at $1,076 found 5 days ago
British Airways
Mon, Apr 20 - Wed, Apr 29
SEA
Seattle
KOI
Kirkwall
$1,080 Roundtrip, found 6 hours ago
$1,080
Roundtrip
found 6 hours ago
Select British Airways flight, departing Mon, Apr 20 from Seattle to Kirkwall, returning Wed, Apr 29, priced at $1,080 found 6 hours ago
British Airways
Sun, Dec 7 - Sun, Dec 14
SEA
Seattle
KOI
Kirkwall
$1,084 Roundtrip, found 5 days ago
$1,084
Roundtrip
found 5 days ago
Select British Airways flight, departing Sun, Dec 7 from Seattle to Kirkwall, returning Sun, Dec 14, priced at $1,084 found 5 days ago
British Airways
Sun, Dec 7 - Sun, Dec 14
SEA
Seattle
KOI
Kirkwall
$1,086 Roundtrip, found 5 days ago
$1,086
Roundtrip
found 5 days ago
Select British Airways flight, departing Sun, Dec 7 from Seattle to Kirkwall, returning Sun, Dec 14, priced at $1,086 found 5 days ago
British Airways
Mon, Apr 20 - Wed, Apr 29
SEA
Seattle
KOI
Kirkwall
$1,090 Roundtrip, found 6 hours ago
$1,090
Roundtrip
found 6 hours ago
Select British Airways flight, departing Mon, Apr 20 from Seattle to Kirkwall, returning Wed, Apr 29, priced at $1,090 found 6 hours ago
Flights from Seattle (SEA) to Kirkwall (KOI)
Origin airport
Seattle - Tacoma Intl.
Destination airport
Kirkwall
Airlines serving
British Airways
Roundtrip price
$979
Distance
4326 mi

Seattle to Kirkwall Flights

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

 

The best time to book a flight from Seattle to Kirkwall

Sunday is one of the best days to book for cheap flights from Seattle 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 Seattle 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 Seattle to Kirkwall in 2025. You can also book with separate airlines for your outbound and return journeys, from $666 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 Seattle 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 Seattle 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.

 

Frequently asked questions

How much does a flight from Seattle - Tacoma Intl. Airport (SEA) to Kirkwall Airport (KOI) cost?
Get a cheap one-way flight from $666 or cheap return flight from $980 from Seattle - Tacoma Intl. Airport (SEA) to Kirkwall Airport (KOI) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Seattle - Tacoma Intl. Airport (SEA) to Kirkwall Airport (KOI)?
April is the cheapest month to fly from SEA to KOI. Planning your trip for the off-season is often the key to landing a great deal.
What is the cheapest airline that flies from Seattle - Tacoma Intl. Airport (SEA) to Kirkwall Airport (KOI)?
To find the cheapest airline flying from SEA to KOI, use Expedia's filter tool. Tailor your search based on what matters most to you, such as preferred carriers and cabin class. You can then sort your results by "Price (lowest to highest)" to see the cheapest flights first.
How many flights per day from Seattle - Tacoma Intl. Airport (SEA) to Kirkwall Airport (KOI)?
Nonstop flights from Seattle - Tacoma Intl. Airport (SEA) to Kirkwall Airport (KOI) aren't available daily, so you'll have to take a flight with a layover. Explore your options with Expedia's filter tool. Enter your travel dates and choose either "1 Stop" or "2+ Stops."
What day of the week has the most flights from SEA to KOI?
You'll typically find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can vary from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Seattle - Tacoma Intl. Airport (SEA) to Kirkwall Airport (KOI)?
To land at Kirkwall Airport (KOI) on time, book a flight that leaves from Seattle - Tacoma Intl. Airport (SEA) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this hour.**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 Seattle - Tacoma Intl. Airport (SEA) to Kirkwall Airport (KOI) last-minute?
Holding off until right before your break to book a flight from SEA to KOI often results in higher prices. While you might find some last-minute deals, they aren't always guaranteed. Keep your travel schedule open to boost your chances of snagging a bargain.
Is it cheaper to book a SEA to KOI flight and hotel package?
You'll generally save money by booking a SEA to KOI flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's simple to manage it all in one place. After selecting your preferred flights and accommodations, you can add extras such as tours, activities and car rentals.
Can I cancel or change the date of my flight from Seattle - Tacoma Intl. Airport (SEA) to Kirkwall Airport (KOI)?
Generally, it's possible to cancel or reschedule your SEA to KOI flight. However, if the booking was made more than 24 hours ago, additional fees 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 further details on our Customer Service portal.

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*Available to One Key members.