$548 Cheap Flights from Sofia (SOF) to Seattle (SEA)

View $548 flight on Mon, Sep 28, 2026Opens in a new window

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

  • 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 OneKeyCash
    Learn about One Key

Cheap Flights from Sofia to Seattle (SOF-SEA)

Prices were available within the past 7 days and start at $548 for one-way flights and $760 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Bulgaria Air
Mon, Apr 27 - Thu, May 7
SOF
Sofia
SEA
Seattle
$760 Roundtrip, found 3 days ago
$760
Roundtrip
found 3 days ago
Select Bulgaria Air flight, departing Mon, Apr 27 from Sofia to Seattle, returning Thu, May 7, priced at $760 found 3 days ago
Bulgaria Air
Mon, Apr 27 - Thu, May 7
SOF
Sofia
SEA
Seattle
$800 Roundtrip, found 3 days ago
$800
Roundtrip
found 3 days ago
Select Bulgaria Air flight, departing Mon, Apr 27 from Sofia to Seattle, returning Thu, May 7, priced at $800 found 3 days ago
British Airways
Wed, Jun 3 - Wed, Jul 29
SOF
Sofia
SEA
Seattle
$832 Roundtrip, found 5 days ago
$832
Roundtrip
found 5 days ago
Select British Airways flight, departing Wed, Jun 3 from Sofia to Seattle, returning Wed, Jul 29, priced at $832 found 5 days ago
British Airways
Wed, Jun 3 - Wed, Jul 29
SOF
Sofia
SEA
Seattle
$842 Roundtrip, found 5 days ago
$842
Roundtrip
found 5 days ago
Select British Airways flight, departing Wed, Jun 3 from Sofia to Seattle, returning Wed, Jul 29, priced at $842 found 5 days ago
British Airways
Wed, Jun 3 - Wed, Jul 29
SOF
Sofia
SEA
Seattle
$883 Roundtrip, found 5 days ago
$883
Roundtrip
found 5 days ago
Select British Airways flight, departing Wed, Jun 3 from Sofia to Seattle, returning Wed, Jul 29, priced at $883 found 5 days ago
Lufthansa
Sun, May 10 - Sun, May 31
SOF
Sofia
SEA
Seattle
$890 Roundtrip, found 5 hours ago
$890
Roundtrip
found 5 hours ago
Select Lufthansa flight, departing Sun, May 10 from Sofia to Seattle, returning Sun, May 31, priced at $890 found 5 hours ago
Lufthansa
Sun, May 10 - Sun, May 31
SOF
Sofia
SEA
Seattle
$892 Roundtrip, found 5 hours ago
$892
Roundtrip
found 5 hours ago
Select Lufthansa flight, departing Sun, May 10 from Sofia to Seattle, returning Sun, May 31, priced at $892 found 5 hours ago
Air Canada
Mon, May 4 - Mon, Jun 29
SOF
Sofia
SEA
Seattle
$904 Roundtrip, found 4 days ago
$904
Roundtrip
found 4 days ago
Select Air Canada flight, departing Mon, May 4 from Sofia to Seattle, returning Mon, Jun 29, priced at $904 found 4 days ago
Austrian Airlines
Mon, Apr 6 - Mon, May 4
SOF
Sofia
SEA
Seattle
$923 Roundtrip, found 5 days ago
$923
Roundtrip
found 5 days ago
Select Austrian Airlines flight, departing Mon, Apr 6 from Sofia to Seattle, returning Mon, May 4, priced at $923 found 5 days ago
Swiss International Air Lines
Wed, Apr 8 - Thu, Apr 30
SOF
Sofia
SEA
Seattle
$946 Roundtrip, found 14 hours ago
$946
Roundtrip
found 14 hours ago
Select Swiss International Air Lines flight, departing Wed, Apr 8 from Sofia to Seattle, returning Thu, Apr 30, priced at $946 found 14 hours ago

The Annual Vacation Sale

Members save up to 40% on hotels and homes. Plan this year’s big trip and save.
Book now

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

March is typically the cheapest month to fly

From $711 - $1,162 per traveler.

Frequently asked questions

How much does a flight from Sofia (SOF) to Seattle, WA (SEA-Seattle - Tacoma Intl.) cost?
You can find cheap one-way flights from $548 and cheap return flights from $760 Sofia (SOF) to Seattle, WA (SEA-Seattle - Tacoma Intl.) with Expedia. One-way flights typically cost between $927 and $3716, and return flights often range between $941 and $4772. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Sofia (SOF) to Seattle, WA (SEA-Seattle - Tacoma Intl.) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Sofia (SOF) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
February is generally the cheapest month to fly from Sofia (SOF) to Seattle, WA (SEA), with average return fares around $840. This price is about 10% lower than the average fare for the year, as travel demand tends to be lower during the winter months. Other budget-friendly months to consider are March and April.*Averages based on flights available on Expedia in the last year.
Which airlines fly direct from Sofia (SOF) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
Enter SOF to SEA and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from Sofia (SOF) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
KLM is one of the cheapest airlines offering connecting flights from Sofia (SOF) to Seattle, WA (SEA), with round-trip tickets starting from around $948 with a layover in Schiphol (AMS). Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from Sofia (SOF) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
To find a cheap flight from Sofia (SOF) to Seattle, WA (SEA-Seattle - Tacoma Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Sofia (SOF) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The ideal months to fly from Sofia (SOF) to Seattle (SEA) are February and April, with average return flight prices around $840. February is a great choice for budget travelers, while April offers milder weather, making it a pleasant time to explore Seattle.*Prices based on flights available on Expedia in the last year.
What is the earliest flight from Sofia (SOF) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The earliest flight from Sofia (SOF) to Seattle-Tacoma International Airport (SEA) typically departs at around 1:10 AM, operated by flydubai and Emirates. An early start like this allows you to maximize your time in Seattle. This service is seasonal, so be sure to check if it's available during your travel dates. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from Sofia (SOF) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The most popular departure times for flights from Sofia (SOF) to Seattle, WA (SEA-Seattle - Tacoma Intl.) are in the early morning, from 6am to 9am. This time accounts for around 67% of total traffic, making it a great choice for early travelers. Airlines like Lufthansa and United Airlines operate flights during this window.
How long does it take to fly from Sofia (SOF) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
Flying from SOF to SEA with a connection usually takes about 14 hours 50 minutes, traveling roughly 5,867 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Sofia (SOF) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
You can fly business class between SOF and SEA. Airlines that offer business class service on this route include:

  • Lufthansa
  • British Airways
  • Bulgaria Air
  • Austrian Airlines
  • Turkish Airlines
  • Swiss International Air Lines
  • Tarom
  • flydubai
  • Qatar Airways
  • Helvetic Airways

How do I earn miles on a Sofia (SOF) to Seattle, WA (SEA-Seattle - Tacoma Intl.) flight with Expedia?
It's easy to earn miles on a Sofia (SOF) to Seattle, WA (SEA-Seattle - Tacoma Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Seattle from SOF (SOF)?
If you're planning to travel to Seattle from SOF (SOF), you can fly into Seattle - Tacoma Intl. (SEA) Some flights may connect through major hubs like Frankfurt Intl. (FRA), Franz Josef Strauss Intl. (MUC), Vienna Intl. (VIE) before reaching Seattle. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Sofia (SOF) to Seattle, WA (SEA-Seattle - Tacoma Intl.) at the last minute?
Typically, booking a last minute flight from Sofia (SOF) to Seattle, WA (SEA-Seattle - Tacoma Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Sofia (SOF) to Seattle, WA (SEA-Seattle - Tacoma Intl.) flight and hotel package?
Securing a Sofia (SOF) to Seattle, WA (SEA-Seattle - Tacoma Intl.) Seattle Vacation Packages is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive 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 Sofia (SOF) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
If you booked your Sofia (SOF) to Seattle, WA (SEA-Seattle - Tacoma Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Sofia
Destination airport
Seattle - Tacoma Intl.
Airlines serving
Air Canada, Air France, Austrian Airlines, British Airways, Emirates, Iberia, KLM, Lufthansa, Qatar Airways, Swiss International Air Lines, Turkish Airlines, United
Roundtrip price
$760
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 April. 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 2026. You can also book with separate airlines for your outbound and return journeys, from $548 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

*Flight schedules are subject to change.

Explore a world of travel with Expedia

*Available to One Key members.