A historic square with ornate buildings, a prominent cathedral, and a tram in motion.

$345 Cheap Flights from Seattle (SEA) to Sofia (SOF)

View $345 flight on Tue, Feb 9, 2027Opens in a new window

Flight 1

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

  • 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 Seattle to Sofia (SEA-SOF)

Prices were available within the past 7 days and start at $345 for one-way flights and $747 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Lufthansa
Wed, Nov 25 - Fri, Dec 4
SEA
Seattle
SOF
Sofia
$747 Roundtrip, found 2 days ago
$747
Roundtrip
found 2 days ago
Select Lufthansa flight, departing Wed, Nov 25 from Seattle to Sofia, returning Fri, Dec 4, priced at $747 found 2 days ago
Lufthansa
Wed, Nov 25 - Fri, Dec 4
SEA
Seattle
SOF
Sofia
$749 Roundtrip, found 2 days ago
$749
Roundtrip
found 2 days ago
Select Lufthansa flight, departing Wed, Nov 25 from Seattle to Sofia, returning Fri, Dec 4, priced at $749 found 2 days ago
United
Mon, Jan 11 - Fri, Jan 22
SEA
Seattle
SOF
Sofia
$752 Roundtrip, found 5 days ago
$752
Roundtrip
found 5 days ago
Select United flight, departing Mon, Jan 11 from Seattle to Sofia, returning Fri, Jan 22, priced at $752 found 5 days ago
Lufthansa
Wed, Nov 25 - Fri, Dec 4
SEA
Seattle
SOF
Sofia
$755 Roundtrip, found 2 days ago
$755
Roundtrip
found 2 days ago
Select Lufthansa flight, departing Wed, Nov 25 from Seattle to Sofia, returning Fri, Dec 4, priced at $755 found 2 days ago
Lufthansa
Wed, Nov 25 - Fri, Dec 4
SEA
Seattle
SOF
Sofia
$757 Roundtrip, found 2 days ago
$757
Roundtrip
found 2 days ago
Select Lufthansa flight, departing Wed, Nov 25 from Seattle to Sofia, returning Fri, Dec 4, priced at $757 found 2 days ago
Lufthansa
Wed, Nov 25 - Fri, Dec 4
SEA
Seattle
SOF
Sofia
$759 Roundtrip, found 2 days ago
$759
Roundtrip
found 2 days ago
Select Lufthansa flight, departing Wed, Nov 25 from Seattle to Sofia, returning Fri, Dec 4, priced at $759 found 2 days ago
Lufthansa
Wed, Nov 25 - Fri, Dec 4
SEA
Seattle
SOF
Sofia
$761 Roundtrip, found 2 days ago
$761
Roundtrip
found 2 days ago
Select Lufthansa flight, departing Wed, Nov 25 from Seattle to Sofia, returning Fri, Dec 4, priced at $761 found 2 days ago
Air Canada
Wed, Nov 25 - Fri, Dec 4
SEA
Seattle
SOF
Sofia
$767 Roundtrip, found 2 days ago
$767
Roundtrip
found 2 days ago
Select Air Canada flight, departing Wed, Nov 25 from Seattle to Sofia, returning Fri, Dec 4, priced at $767 found 2 days ago
Turkish Airlines
Thu, May 13 - Fri, May 21
SEA
Seattle
SOF
Sofia
$795 Roundtrip, found 2 days ago
$795
Roundtrip
found 2 days ago
Select Turkish Airlines flight, departing Thu, May 13 from Seattle to Sofia, returning Fri, May 21, priced at $795 found 2 days ago
Austrian Airlines
Mon, Feb 1 - Mon, Feb 22
SEA
Seattle
SOF
Sofia
$802 Roundtrip, found 3 days ago
$802
Roundtrip
found 3 days ago
Select Austrian Airlines flight, departing Mon, Feb 1 from Seattle to Sofia, returning Mon, Feb 22, priced at $802 found 3 days ago

Frequently asked questions

How much does a flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Sofia (SOF) cost?
You can find cheap one-way flights from $345 and cheap return flights from $747 Seattle, WA (SEA-Seattle - Tacoma Intl.) to Sofia (SOF) with Expedia. One-way flights typically cost between $476 and $4801, and return flights often range between $674 and $6368. 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 Seattle, WA (SEA-Seattle - Tacoma Intl.) to Sofia (SOF) 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 Seattle, WA (SEA-Seattle - Tacoma Intl.) to Sofia (SOF)?
October is the cheapest month to fly from Seattle, WA (SEA) to Sofia (SOF), with average return fares around $609. This price is about 36% lower than the average throughout the year, likely due to lower travel demand in the fall. Other economical months to consider are January and February.*Averages based on flights available on Expedia in the last year.
Which airlines fly direct from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Sofia (SOF)?
Enter SEA to SOF and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Sofia (SOF)?
Iberia is one of the cheapest airlines offering connecting flights from Seattle - Tacoma Intl. (SEA) to Sofia (SOF), with round-trip tickets starting from around $975 with a layover in Dallas-Fort Worth Intl. (DFW). 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 Seattle, WA (SEA-Seattle - Tacoma Intl.) to Sofia (SOF)?
To find a cheap flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Sofia (SOF), 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 Seattle, WA (SEA-Seattle - Tacoma Intl.) to Sofia (SOF)?
The ideal months to fly from Seattle (SEA) to Sofia (SOF) are October and February. In October, you can find return flights for about $609, while February is also a great choice with similar pricing. These months balance affordability and pleasant travel conditions, making them perfect for your trip.*Prices based on flights available on Expedia in the last year.
What is the earliest flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Sofia (SOF)?
Sort flights by "Departure (earliest)" on Expedia to find the earliest flight from SEA to SOF. To compare more early flights, use the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Sofia (SOF)?
The most popular departure times for flights from Seattle - Tacoma Intl. (SEA) to Sofia (SOF) are in the early morning, from 6am to 9am. About 32% of passengers prefer this time window. Many major carriers, including United Airlines and Lufthansa, offer flights during this window. This timing is favored as it allows you to start your day early and make the most of your time in Sofia.
How long does it take to fly from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Sofia (SOF)?
Flying from SEA to SOF with a connection usually takes about 14 hours 20 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 Seattle, WA (SEA-Seattle - Tacoma Intl.) to Sofia (SOF)?
You can fly business class between SEA and SOF. Airlines that offer business class service on this route include:

  • American Airlines
  • Turkish Airlines
  • Lufthansa
  • Air Canada
  • Icelandair
  • British Airways
  • United Airlines
  • Delta Air Lines
  • Air France
  • Emirates

First class is available with United Airlines.
How do I earn miles on a Seattle, WA (SEA-Seattle - Tacoma Intl.) to Sofia (SOF) flight with Expedia?
It's easy to earn miles on a Seattle, WA (SEA-Seattle - Tacoma Intl.) to Sofia (SOF) 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.
Is it cheaper to buy a plane ticket from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Sofia (SOF) at the last minute?
Typically, booking a last minute flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Sofia (SOF) 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 Seattle, WA (SEA-Seattle - Tacoma Intl.) to Sofia (SOF) flight and hotel package?
Securing a Seattle, WA (SEA-Seattle - Tacoma Intl.) to Sofia (SOF) Sofia 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 Seattle, WA (SEA-Seattle - Tacoma Intl.) to Sofia (SOF)?
If you booked your Seattle, WA (SEA-Seattle - Tacoma Intl.) to Sofia (SOF) 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
Seattle - Tacoma Intl.
Destination airport
Sofia
Airlines serving
Air Canada, Air France, Austrian Airlines, British Airways, Emirates, ITA Airways, Iberia, JetBlue Airways, Lufthansa, Swiss International Air Lines, Turkish Airlines, United
Roundtrip price
$747
Distance
5866 mi

Book with confidence

Seattle to Sofia Flights

The cheapest times to fly from Seattle to Sofia

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

 

The best time to book a flight from Seattle to Sofia

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

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 Sofia in 2026. You can also book with separate airlines for your outbound and return journeys, from $345 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 Sofia 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 Sofia 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.

 

Seattle to Sofia Flights

*Flight schedules are subject to change.

*Available to One Key members.

 

Explore a world of travel with Expedia