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Sofia

$461+ 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 5/21. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SOF
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
1 adult, Economy
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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Sofia are usually found in October or January, booked 35 days in advance, depart on a Saturday or Monday and return on a Sunday

Cheap flight deals from Seattle to Sofia

Best flights from Seattle to Sofia
Discover carefully curated flight deals from Seattle to Sofia that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 12, 2025.

This Ticket deal was found by Cheapflights users on 12/9. 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/221:40 pmSEA - SOF
1 stop14h 15mMultiple Airlines
Thu 1/297:00 amSOF - SEA
1 stop14h 50mMultiple Airlines
Deal found 12/9$503
This Lufthansa deal was found by Cheapflights users on 12/11. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 1/253:10 pmSEA - SOF
1 stop17h 10mLufthansa
Sun 2/16:10 amSOF - SEA
2 stops23h 06mLufthansa
Deal found 12/11$530
This United Airlines deal was found by Cheapflights users on 12/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/298:40 amSEA - SOF
3 stops28h 05mUnited Airlines
Mon 2/26:10 amSOF - SEA
1 stop16h 00mUnited Airlines
Deal found 12/10$535
This KLM deal was found by Cheapflights users on 12/9. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/77:10 amSEA - SOF
2 stops20h 55mKLM
Wed 1/147:00 amSOF - SEA
1 stop14h 50mKLM
Deal found 12/9$539
This Mytrip deal was found by Cheapflights users on 12/11. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 1/257:00 amSEA - SOF
2 stops20h 35mMultiple Airlines
Sun 2/16:10 amSOF - SEA
2 stops23h 06mMultiple Airlines
Deal found 12/11$542
This United Airlines deal was found by Cheapflights users on 12/9. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/228:40 amSEA - SOF
3 stops28h 05mUnited Airlines
Thu 1/296:05 amSOF - SEA
2 stops26h 11mUnited Airlines
Deal found 12/9$543
This United Airlines deal was found by Cheapflights users on 12/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 1/256:18 amSEA - SOF
2 stops26h 02mUnited Airlines
Sun 2/16:10 amSOF - SEA
3 stops26h 33mUnited Airlines
Deal found 12/11$545

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 December 12, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$486
(Ticket)

One-way from

$461
(Kiwi.com)

Popular in

June

Cheapest in

October

Average price

$909
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. 15% potential increase in price ($148 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($26 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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 December 12, 2025.
Use the filters below to find and compare flights from Seattle to Sofia that are best for you.

Fly from

Seattle

Fly to

Sofia

Route

Depart

Return

Price

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Thu 1/22

1:40 pm-1:55 pm

1 stop14h 15m

Sofia

Thu 1/29

7:00 am-11:50 am

1 stop14h 50m

$503

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Sun 1/25

3:10 pm-6:20 pm

1 stop17h 10m

Sofia

Sun 2/1

6:10 am-7:16 pm

2 stops23h 06m

$530

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Thu 1/29

8:40 am-10:45 pm

3 stops28h 05m

Sofia

Mon 2/2

6:10 am-12:10 pm

1 stop16h 00m

$535

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Wed 1/7

7:10 am-2:05 pm

2 stops20h 55m

Sofia

Wed 1/14

7:00 am-11:50 am

1 stop14h 50m

$539

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Sun 1/25

7:00 am-1:35 pm

2 stops20h 35m

Sofia

Sun 2/1

6:10 am-7:16 pm

2 stops23h 06m

$542

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Thu 1/22

8:40 am-10:45 pm

3 stops28h 05m

Sofia

Thu 1/29

6:05 am-10:16 pm

2 stops26h 11m

$543

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Sun 1/25

6:18 am-6:20 pm

2 stops26h 02m

Sofia

Sun 2/1

6:10 am-10:43 pm

3 stops26h 33m

$545

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Thu 5/21

7:00 pm-8:40 am

3 stops27h 40m

$461

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Fri 5/22

7:00 pm-3:40 pm

3 stops34h 40m

$466

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Fri 5/22

7:10 pm-8:45 am

1 stop27h 35m

$756

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/10

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 December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Seattle-Sofia flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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?

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Sofia. Price data was last updated on December 5, 2025.

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 35 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, July is the cheapest month in which you can book a flight from Seattle to Sofia (average of $510). Flying from Seattle to Sofia in June is currently the most expensive (average of $943). 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.

What is the cheapest time of day to fly from SEA to SOF?

Find hourly flight availability from Seattle to Sofia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 12, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 18% on flights from Seattle to Sofia by exploring options for tickets in the evening.

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 December 12, 2025.
Get a feel of what it's like to fly with KLM, Air France, and United 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
7.7
Good
1,432 reviews

Entertainment

7.1

Food

7.2

Boarding

7.8

Comfort

7.6

Crew

8.3

Overall

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
KLM
7.7
Good
1,432 reviews
KLM
7.7
Good
1,432 reviews

Entertainment

7.1

Food

7.2

Boarding

7.8

Comfort

7.6

Crew

8.3

Overall

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
Air France
7.4
Good
1,504 reviews
KLM
7.7
Good
1,432 reviews

Entertainment

7.1

Food

7.2

Boarding

7.8

Comfort

7.6

Crew

8.3

Overall

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
United Airlines
7.4
Good
9,095 reviews
KLM
7.7
Good
1,432 reviews

Entertainment

7.1

Food

7.2

Boarding

7.8

Comfort

7.6

Crew

8.3

Overall

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
Turkish Airlines
7.3
Good
4,090 reviews
KLM
7.7
Good
1,432 reviews

Entertainment

7.1

Food

7.2

Boarding

7.8

Comfort

7.6

Crew

8.3

Overall

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
Lufthansa
6.8
Okay
7,626 reviews
KLM
7.7
Good
1,432 reviews

Entertainment

7.1

Food

7.2

Boarding

7.8

Comfort

7.6

Crew

8.3

Overall

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle

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 17h 10m. Lufthansa provides one of the quickest options available for as low as $530. Seattle and Sofia are separated by a distance of 5862 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    Cheapflights users have booked flights from Seattle to Sofia round-trip from $541. Other airlines that can offer you cheap pricing are Air France, from $555, and Turkish Airlines, from $587. Lufthansa is 31% 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, July is the cheapest month in which you can book a flight from Seattle to Sofia (average of $510). Flying from Seattle to Sofia in June is currently the most expensive (average of $943). 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.
Spokane to Sofia flights
Portland to Sofia flights

Top 5 airlines flying from Seattle to Sofia

Discover the top 5 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 December 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$541Average$847FlexibilityNo cancel feeOn-time76%
Air FranceCheapest$555Average$718FlexibilityNo cancel feeOn-time77%
Turkish AirlinesCheapest$587Average$833FlexibilityNo cancel feeOn-time77%
KLMCheapest$615Average$908FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$676Average$885FlexibilityNo cancel feeOn-time69%

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