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Sofia

$299+ Cheap flights from Seattle (SEA) to Sofia (SOF)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/8. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SOF
Aug 27 — Sep 31
Thu 8/27
Thu 9/3
1 adult, Economy
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Cheap flight deals from Seattle to Sofia

Cheapest flights from Seattle to Sofia
Explore the most affordable flight options available from Seattle to Sofia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 28, 2026.

This Turkish Airlines deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/87:15 pm
SEA
-
SOF
1 stop15h 05m
Turkish Airlines
Tue 10/209:35 am
SOF
-
SEA
1 stop17h 45m
Turkish Airlines
Deal found 7/27$699
This deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/187:15 pm
SEA
-
SOF
1 stop15h 05m
Turkish Airlines
Sun 10/49:35 am
SOF
-
SEA
1 stop17h 45m
Turkish Airlines
Deal found 7/22$723
This Turkish Airlines deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/187:15 pm
SEA
-
SOF
1 stop15h 05m
Turkish Airlines
Thu 9/249:35 am
SOF
-
SEA
1 stop17h 45m
Turkish Airlines
Deal found 7/27$739
This FlightHub deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/27:00 am
SEA
-
SOF
2 stops25h 20m
Lufthansa
Fri 11/66:00 am
SOF
-
SEA
1 stop17h 00m
Lufthansa
Deal found 7/25$751
This Turkish Airlines deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/77:15 pm
SEA
-
SOF
1 stop30h 30m
Turkish Airlines
Mon 10/129:35 am
SOF
-
SEA
1 stop17h 45m
Turkish Airlines
Deal found 7/22$754
This Orbitz deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/77:15 pm
SEA
-
SOF
1 stop15h 05m
Turkish Airlines
Wed 9/239:10 pm
SOF
-
SEA
1 stop30h 10m
Turkish Airlines
Deal found 7/22$779
This oojo deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/266:50 pm
SEA
-
SOF
1 stop13h 50m
Lufthansa
Wed 9/26:20 am
SOF
-
SEA
1 stop15h 35m
Lufthansa
Deal found 7/27$811
This Kiwi.com deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/166:50 pm
SEA
-
SOF
1 stop13h 50m
Multiple Airlines
Tue 10/138:00 am
SOF
-
SEA
2 stops20h 52m
Multiple Airlines
Deal found 7/23$812
This oojo deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/76:50 pm
SEA
-
SOF
1 stop13h 50m
Lufthansa
Tue 10/136:10 am
SOF
-
SEA
2 stops22h 22m
Lufthansa
Deal found 7/26$813
This Gotogate deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/96:50 pm
SEA
-
SOF
1 stop18h 25m
Multiple Airlines
Tue 9/156:10 am
SOF
-
SEA
2 stops26h 37m
Multiple Airlines
Deal found 7/22$814

Find flight deals from Seattle to Sofia

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Sofia (SOF). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 28, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$699
(Turkish Airlines)

One-way from

$299
(Kiwi.com)

Popular in

June

Cheapest in

October

Average price

$914
Provider with most accurate pricing for Seattle/Tacoma Intl-Sofia flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Sofia flights.
Search Deals
From Seattle/Tacoma Intl to Sofia
Search Deals
One-way flight from Seattle/Tacoma Intl to Sofia
Search Deals
Highest demand for flights based on searches. 19% potential increase in price ($181 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($36 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Sofia that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 28, 2026.
Use the filters below to find and compare flights from Seattle to Sofia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Wed 10/14

7:15 pm-11:45 am

1 stop30h 30m

Sofia

Tue 10/20

9:35 am-5:20 pm

1 stop17h 45m

$699

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Fri 10/9

7:15 pm-3:00 pm

1 stop33h 45m

Sofia

Mon 10/19

9:10 pm-5:20 pm

1 stop30h 10m

$699

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Wed 10/7

7:15 pm-8:45 am

1 stop27h 30m

Sofia

Mon 10/19

9:10 pm-5:20 pm

1 stop30h 10m

$699

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Thu 10/8

7:15 pm-3:00 pm

1 stop33h 45m

Sofia

Mon 10/19

3:50 pm-5:20 pm

1 stop35h 30m

$699

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Wed 10/7

7:15 pm-3:00 pm

1 stop33h 45m

Sofia

Tue 10/13

9:10 pm-5:20 pm

1 stop30h 10m

$699
Quickest round-trip

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Thu 10/8

7:15 pm-8:20 pm

1 stop15h 05m

Sofia

Tue 10/20

9:35 am-5:20 pm

1 stop17h 45m

$699

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Fri 9/18

7:15 pm-8:20 pm

1 stop15h 05m

Sofia

Sun 10/4

9:35 am-5:20 pm

1 stop17h 45m

$723

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Sun 9/6

7:15 pm-3:00 pm

1 stop33h 45m

Sofia

Tue 9/22

3:50 pm-5:20 pm

1 stop35h 30m

$739

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Sun 1/10

2:50 pm-10:45 pm

1 stop21h 55m

Sofia

Thu 1/14

6:25 am-12:00 pm

1 stop15h 35m

$751

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Thu 10/8

7:15 pm-8:20 pm

1 stop15h 05m

Sofia

Tue 10/13

3:50 pm-5:20 pm

1 stop35h 30m

$779

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/23

Showing 1-10 of 16 resultsSorted by cheapest first
1
2

Compare providers for flights from Seattle to Sofia

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Seattle to Sofia in July.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Seattle-Sofia flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-Sofia flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Seattle-Sofia flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seattle-Sofia flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Seattle-Sofia flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Seattle to Sofia

Have a flexible travel schedule? Discover the best time to fly to Sofia from Seattle with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Seattle to Sofia

How far ahead should I book a flight from Seattle to Sofia?

The price you pay for your flight from Seattle to Sofia may vary depending on when you book. For the best chance of a lower fare, look to book 23 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Seattle to Sofia?

Currently, October is the cheapest month in which you can book a flight from Seattle to Sofia (average of $582). Flying from Seattle to Sofia in June is currently the most expensive (average of $1,147). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

How much does it cost to fly round-trip from Seattle to Sofia?

Airfare is below average for this route at the moment.

Seattle to Sofia flights typically cost between $709 and $1,009 in October.
The cheapest round-trip price found within the last 5 days was $699 on Turkish Airlines (Oct 8-Oct 20).

Reviews of airlines servicing Sofia

Get insights into the airlines that provide service to Sofia. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Sofia. Reviews last updated July 28, 2026.
Get a feel of what it's like to fly with KLM,Turkish Airlines, andUnited Airlines from Seattle to Sofia by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.8
Good
1,550 reviews

Entertainment

7.2

Food

7.3

Comfort

7.7

Crew

8.4

Overall

7.8

Boarding

7.8

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
KLM
7.8
Good
1,550 reviews
KLM
7.8
Good
1,550 reviews

Entertainment

7.2

Food

7.3

Comfort

7.7

Crew

8.4

Overall

7.8

Boarding

7.8

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
Turkish Airlines
7.4
Good
4,454 reviews
KLM
7.8
Good
1,550 reviews

Entertainment

7.2

Food

7.3

Comfort

7.7

Crew

8.4

Overall

7.8

Boarding

7.8

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
United Airlines
7.4
Good
10,045 reviews
KLM
7.8
Good
1,550 reviews

Entertainment

7.2

Food

7.3

Comfort

7.7

Crew

8.4

Overall

7.8

Boarding

7.8

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
Lufthansa
6.8
Okay
8,162 reviews
KLM
7.8
Good
1,550 reviews

Entertainment

7.2

Food

7.3

Comfort

7.7

Crew

8.4

Overall

7.8

Boarding

7.8

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful

Related info for your journey

Find useful and relevant information for your journey from Seattle to Sofia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Seattle to Sofia?

    A quick flight from Seattle to Sofia can take about 30h 30m. Turkish Airlines provides one of the quickest options available for as low as $699. Seattle and Sofia are separated by a distance of 5862 mi.

  • What are the cheapest airlines flying from Seattle to Sofia round-trip?

    Cheapflights users have booked flights from Seattle to Sofia round-trip from $538. Other airlines that can offer you cheap pricing are Lufthansa, from $540, and Turkish Airlines, from $570. KLM is 28% cheaper than the average price of flights available within the next 90 days to this destination.

  • Can I find deals for flights from Seattle to Sofia that include hotel bookings?

    Yes. In addition to deals on Seattle to Sofia flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Sofia?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Sofia.

  • Can I find deals for business class flights from Seattle to Sofia?

    Yes. Cheapflights offers flight deals from Seattle to Sofia by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Seattle to Sofia?

    Currently, October is the cheapest month in which you can book a flight from Seattle to Sofia (average of $582). Flying from Seattle to Sofia in June is currently the most expensive (average of $1,147). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Seattle to Sofia

See prices for flight routes from nearby airports that may be better suited for you.
Portland to Sofia flights

Top 4 airlines flying from Seattle to Sofia

Discover the top 4 airlines that operate flights from Seattle to Sofia. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 28, 2026.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$538Average$908FlexibilityNo cancel feeOn-time75%
LufthansaCheapest$540Average$919FlexibilityNo cancel feeOn-time76%
Turkish AirlinesCheapest$570Average$681FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$620Average$885FlexibilityNo cancel feeOn-time69%

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