$550 Cheap Flights from Sofia (SOF) to Seattle (SEA)

View $550 flight on Sun, Jun 7, 2026Opens in a new window

Popular airlines from Sofia Airport (SOF) to Seattle-Tacoma International Airport (SEA)

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Cheap Flights from Sofia to Seattle (SOF-SEA)

Prices were available within the past 7 days and start at $550 for one-way flights and $870 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Bulgaria Air
Mon, Dec 15 - Tue, Jan 6
SOF
Sofia
SEA
Seattle
$870 Roundtrip, found 6 days ago
$870
Roundtrip
found 6 days ago
Select Bulgaria Air flight, departing Mon, Dec 15 from Sofia to Seattle, returning Tue, Jan 6, priced at $870 found 6 days ago
Bulgaria Air
Mon, Nov 24 - Mon, Mar 2
SOF
Sofia
SEA
Seattle
$880 Roundtrip, found 1 day ago
$880
Roundtrip
found 1 day ago
Select Bulgaria Air flight, departing Mon, Nov 24 from Sofia to Seattle, returning Mon, Mar 2, priced at $880 found 1 day ago
Lufthansa
Mon, Nov 24 - Fri, Dec 5
SOF
Sofia
SEA
Seattle
$894 Roundtrip, found 5 hours ago
$894
Roundtrip
found 5 hours ago
Select Lufthansa flight, departing Mon, Nov 24 from Sofia to Seattle, returning Fri, Dec 5, priced at $894 found 5 hours ago
Lufthansa
Mon, Nov 24 - Fri, Dec 5
SOF
Sofia
SEA
Seattle
$897 Roundtrip, found 5 hours ago
$897
Roundtrip
found 5 hours ago
Select Lufthansa flight, departing Mon, Nov 24 from Sofia to Seattle, returning Fri, Dec 5, priced at $897 found 5 hours ago
Air Canada
Tue, Nov 25 - Tue, Feb 3
SOF
Sofia
SEA
Seattle
$897 Roundtrip, found 4 days ago
$897
Roundtrip
found 4 days ago
Select Air Canada flight, departing Tue, Nov 25 from Sofia to Seattle, returning Tue, Feb 3, priced at $897 found 4 days ago
Lufthansa
Mon, Nov 24 - Wed, Dec 3
SOF
Sofia
SEA
Seattle
$898 Roundtrip, found 1 day ago
$898
Roundtrip
found 1 day ago
Select Lufthansa flight, departing Mon, Nov 24 from Sofia to Seattle, returning Wed, Dec 3, priced at $898 found 1 day ago
Lufthansa
Mon, Nov 24 - Wed, Dec 3
SOF
Sofia
SEA
Seattle
$900 Roundtrip, found 1 day ago
$900
Roundtrip
found 1 day ago
Select Lufthansa flight, departing Mon, Nov 24 from Sofia to Seattle, returning Wed, Dec 3, priced at $900 found 1 day ago
Lufthansa
Mon, Nov 24 - Fri, Dec 5
SOF
Sofia
SEA
Seattle
$901 Roundtrip, found 5 hours ago
$901
Roundtrip
found 5 hours ago
Select Lufthansa flight, departing Mon, Nov 24 from Sofia to Seattle, returning Fri, Dec 5, priced at $901 found 5 hours ago
British Airways
Sat, Dec 6 - Sat, Jan 31
SOF
Sofia
SEA
Seattle
$909 Roundtrip, just found
$909
Roundtrip
just found
Select British Airways flight, departing Sat, Dec 6 from Sofia to Seattle, returning Sat, Jan 31, priced at $909 just found
Austrian Airlines
Mon, May 25 - Fri, Sep 4
SOF
Sofia
SEA
Seattle
$911 Roundtrip, found 4 days ago
$911
Roundtrip
found 4 days ago
Select Austrian Airlines flight, departing Mon, May 25 from Sofia to Seattle, returning Fri, Sep 4, priced at $911 found 4 days ago

Find the cheapest month to fly from Sofia (SOF) to Seattle (SEA)

March is typically the cheapest month to fly

From $711 - $1,149 per traveler.

Alternative airports near Seattle

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Seattle - Tacoma Intl. SEA. Cheapest option available. Average driving time to city center is 20 minutes. Flights from $921
SEA
Seattle - Tacoma Intl.
Cheapest
Average driving time to city center20 min
Flights from $921

Frequently asked questions

How much does a flight from Sofia Airport (SOF) to Seattle - Tacoma Intl. Airport (SEA) cost?
Get a cheap one-way flight from $550 or cheap return flight from $870 from Sofia Airport (SOF) to Seattle - Tacoma Intl. Airport (SEA) 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 Sofia Airport (SOF) to Seattle - Tacoma Intl. Airport (SEA)?
The cheapest month to fly from SOF to SEA is December, when there's less demand. Off-peak season is typically when you'll find lower airfares between these airports.
What is the cheapest airline that flies from Sofia Airport (SOF) to Seattle - Tacoma Intl. Airport (SEA)?
Expedia's filter tool lets you easily compare airlines, flight times and fares all in one place. Customize the search to your preferences, then sort by "Price (lowest to highest)" to find out which carrier offers the cheapest SOF to SEA flight.
How many flights per day from Sofia Airport (SOF) to Seattle - Tacoma Intl. Airport (SEA)?
Direct flights from Sofia Airport (SOF) to Seattle - Tacoma Intl. Airport (SEA) aren't available daily, so you'll need to take a flight with a layover. Explore your options with Expedia's filter tool. Enter your dates and pick either "1 Stop" or "2+ Stops."
What day of the week has the most flights from SOF to SEA?
Usually you'll find the most flight options available on a Friday. Tuesdays tend to be the quietest.* But this can vary based on the season, 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 Sofia Airport (SOF) to Seattle - Tacoma Intl. Airport (SEA)?
To avoid potential delays on the Sofia Airport (SOF) to Seattle - Tacoma Intl. Airport (SEA) route, aim to travel before 3 PM. Departures after this time 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 Sofia Airport (SOF) to Seattle - Tacoma Intl. Airport (SEA) last-minute?
Last-minute bookings from SOF to SEA are generally more expensive. To lock in the lowest rates, start looking for flights as soon as possible. That being said, if you're flexible with your travel dates, you may find a cheap fare just before your departure.
Is it cheaper to book a SOF to SEA flight and hotel package?
Booking a SOF to SEA flight and hotel package is typically cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your trip all in one place. Select from our impressive range of accommodations and then add car rentals, activities and flights 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 Sofia Airport (SOF) to Seattle - Tacoma Intl. Airport (SEA)?
If you booked your SOF to SEA flight within the last 24 hours, you may be able to cancel or modify it without fees. Depending on the airline and the ticket type you purchased, additional charges may apply for changes after that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, visit our Customer Service portal for more details.

Travel information

Origin airport
Sofia
Destination airport
Seattle - Tacoma Intl.
Airlines serving
Air Canada, Air France, Austrian Airlines, British Airways, Emirates, ITA Airways, Iberia, KLM, Lufthansa, Qatar Airways, Swiss International Air Lines, Turkish Airlines, United
Roundtrip price
$870
Distance
5866 mi

Book with confidence

Sofia to Seattle Flights

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

 

The best time to book a flight from Sofia to Seattle

Sunday is one of the best days to book for cheap flights from Sofia 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 Sofia 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 Sofia to Seattle in 2025. You can also book with separate airlines for your outbound and return journeys, from $550 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 Sofia 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 Sofia 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.

 

Sofia to Seattle Flights

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*Available to One Key members.