$500 Cheap Flights from Olbia (OLB) to Seattle (SEA)

View $500 flight on Wed, Oct 15, 2025Opens in a new window

Popular airlines from Costa Smeralda Airport (OLB) to Seattle-Tacoma International Airport (SEA)

Cheap Flights from Olbia to Seattle (OLB-SEA)

Prices were available within the past 7 days and start at $500 for one-way flights and $1,184 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

British Airways
Mon, Sep 22 - Fri, Sep 26
OLB
Olbia
SEA
Seattle
$1,184 Roundtrip, found 4 days ago
$1,184
Roundtrip
found 4 days ago
Select British Airways flight, departing Mon, Sep 22 from Olbia to Seattle, returning Fri, Sep 26, priced at $1,184 found 4 days ago
Swiss International Air Lines
Mon, Sep 22 - Fri, Sep 26
OLB
Olbia
SEA
Seattle
$1,205 Roundtrip, found 4 days ago
$1,205
Roundtrip
found 4 days ago
Select Swiss International Air Lines flight, departing Mon, Sep 22 from Olbia to Seattle, returning Fri, Sep 26, priced at $1,205 found 4 days ago
Flights from Olbia (OLB) to Seattle (SEA)
Origin airport
Costa Smeralda
Destination airport
Seattle - Tacoma Intl.
Roundtrip price
$1,183
Distance
5656 mi

Olbia to Seattle Flights

The cheapest times to fly from Olbia to Seattle

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

 

The best time to book a flight from Olbia to Seattle

Sunday is one of the best days to book for cheap flights from Olbia to Seattle: 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 Olbia to Seattle

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 Olbia to Seattle in 2025. You can also book with separate airlines for your outbound and return journeys, from $500 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 Olbia to Seattle 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 Olbia to Seattle 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 Costa Smeralda Airport (OLB) to Seattle - Tacoma Intl. Airport (SEA) cost?
Snag a cheap one-way flight from $500 or cheap return flight from $1,184 from Costa Smeralda Airport (OLB) to Seattle - Tacoma Intl. Airport (SEA) 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 Costa Smeralda Airport (OLB) to Seattle - Tacoma Intl. Airport (SEA)?
September is the least expensive month to fly from OLB to SEA. Timing your trip outside of the busy season is often the key to landing a great deal.
What is the cheapest airline that flies from Costa Smeralda Airport (OLB) to Seattle - Tacoma Intl. Airport (SEA)?
To find the cheapest airline flying from OLB to SEA, use Expedia's filter tool. Customize your search based on your travel style, such as preferred carriers and number of stops. You can then sort your results by "Price (lowest to highest)" to see the most affordable options first.
How many flights per day from Costa Smeralda Airport (OLB) to Seattle - Tacoma Intl. Airport (SEA)?
There are no daily direct flights departing from Costa Smeralda Airport (OLB) to Seattle - Tacoma Intl. Airport (SEA). But you can opt for flights with layovers. Filter your search on Expedia to include one or more stops, and you'll be cruising above the clouds in no time.
What day of the week has the most flights from OLB to SEA?
Generally you'll find the widest variety of flight choices on a Friday. Tuesdays tend to be the quietest.* But this can change depending on the time of year, airline and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Costa Smeralda Airport (OLB) to Seattle - Tacoma Intl. Airport (SEA)?
To avoid possible delays on the Costa Smeralda Airport (OLB) to Seattle - Tacoma Intl. Airport (SEA) route, aim to 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 Costa Smeralda Airport (OLB) to Seattle - Tacoma Intl. Airport (SEA) last-minute?
Waiting until right before your break to book your flight from OLB to SEA generally means paying more. While you may find some last-minute discounts, there's no guarantee. Be flexible with your itinerary to boost your chances of snagging a bargain.
Is it cheaper to book an OLB to SEA flight and hotel package?
Securing an OLB to SEA flight and hotel package is generally cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Choose from our impressive range of stays and then add activities, flights and car rentals to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Costa Smeralda Airport (OLB) to Seattle - Tacoma Intl. Airport (SEA)?
If you reserved your OLB to SEA flight in the last 24 hours, you may be able to cancel or modify it at no cost. Depending on the airline and the type of fare you have, additional charges may apply for changes after that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal for more information.

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*Available to One Key members.