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$337+ 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 9/13. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SOF
ago. 4 — ago. 111
lun. 8/4
lun. 8/11
1 adult, Economy
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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Sofia are usually found in April or February, booked 44 days in advance, depart on a Saturday or Monday and return on a Sunday

Cheap 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 julio 30, 2025.

Round-trip from

$591
(FlightHub)

One-way from

$337
(Kiwi.com)

Popular in

December

Cheapest in

April

Average price

$881
From Seattle/Tacoma Intl to Sofia
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One-way flight from Seattle/Tacoma Intl to Sofia
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Highest demand for flights based on searches. 14% potential increase in price ($151 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($47 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find 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 julio 30, 2025.

This FlightHub deal was found by Cheapflights users on 7/30. 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.
dom. 9/217:10 pmSEA - SOF
1 stop15h 15mTurkish Airlines
vie. 10/109:15 pmSOF - SEA
1 stop23h 20mTurkish Airlines
Deal found 7/30$591
This United Airlines deal was found by Cheapflights users on 7/29. 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.
lun. 12/2911:15 pmSEA - SOF
2 stops27h 55mUnited Airlines
vie. 1/96:15 amSOF - SEA
1 stop15h 55mUnited Airlines
Deal found 7/29$606
This FlightHub deal was found by Cheapflights users on 7/30. 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.
sáb. 11/228:00 pmSEA - SOF
2 stops36h 20mMultiple Airlines
lun. 12/13:00 pmSOF - SEA
2 stops42h 15mMultiple Airlines
Deal found 7/30$618
This FlightHub deal was found by Cheapflights users on 7/29. 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.
mar. 8/192:20 pmSEA - SOF
1 stop22h 30mLufthansa
mar. 8/266:35 pmSOF - SEA
1 stop27h 20mLufthansa
Deal found 7/29$695
This Air Canada deal was found by Cheapflights users on 7/30. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 12/128:15 amSEA - SOF
2 stops24h 00mAir Canada
mar. 1/66:00 amSOF - SEA
2 stops25h 56mAir Canada
Deal found 7/30$748
This Austrian Airlines deal was found by Cheapflights users on 7/30. 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 Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/158:10 amSEA - SOF
2 stops29h 45mAustrian Airlines
mar. 1/66:45 pmSOF - SEA
2 stops35h 25mAustrian Airlines
Deal found 7/30$792

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 julio 30, 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

dom. 9/21

7:10 pm-8:25 pm

1 stop15h 15m

Sofia

vie. 10/10

9:15 pm-10:35 am

1 stop23h 20m

$591

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

lun. 12/29

11:15 pm-1:10 pm

2 stops27h 55m

Sofia

vie. 1/9

6:15 am-12:10 pm

1 stop15h 55m

$606

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

sáb. 11/22

8:00 pm-6:20 pm

2 stops36h 20m

Sofia

lun. 12/1

3:00 pm-11:15 pm

2 stops42h 15m

$618

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

jue. 1/22

3:40 pm-6:20 pm

2 stops40h 40m

Sofia

mié. 2/4

6:15 am-10:06 pm

2 stops25h 51m

$653

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

mar. 8/19

2:20 pm-10:50 pm

1 stop22h 30m

Sofia

mar. 8/26

6:35 pm-11:55 am

1 stop27h 20m

$695

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

sáb. 9/13

9:39 pm-7:25 pm

2 stops59h 46m

$337

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

sáb. 9/13

12:30 pm-8:35 am

1 stop34h 05m

$3,028

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

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 July 25, 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 44 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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 julio 30, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 19% 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 julio 30, 2025.
Get a feel of what it's like to fly with United Airlines, Turkish Airlines, and Air Canada 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.
United Airlines
7.4
Good
8,896 reviews

Boarding

7.7

Comfort

7.3

Food

6.6

Entertainment

7.1

Overall

7.4

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
8,896 reviews
United Airlines
7.4
Good
8,896 reviews

Boarding

7.7

Comfort

7.3

Food

6.6

Entertainment

7.1

Overall

7.4

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Turkish Airlines
7.3
Good
3,928 reviews
United Airlines
7.4
Good
8,896 reviews

Boarding

7.7

Comfort

7.3

Food

6.6

Entertainment

7.1

Overall

7.4

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Air Canada
7.1
Good
9,837 reviews
United Airlines
7.4
Good
8,896 reviews

Boarding

7.7

Comfort

7.3

Food

6.6

Entertainment

7.1

Overall

7.4

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Lufthansa
6.8
Okay
7,269 reviews
United Airlines
7.4
Good
8,896 reviews

Boarding

7.7

Comfort

7.3

Food

6.6

Entertainment

7.1

Overall

7.4

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

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.

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

    Cheapflights users have booked flights from Seattle to Sofia round-trip from $591. Other airlines that can offer you cheap pricing are United Airlines, from $606, and Air Canada, from $653. Turkish Airlines is 36% 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, November is the cheapest month in which you can book a flight from Seattle to Sofia (average of $632). Flying from Seattle to Sofia in June is currently the most expensive (average of $1,187). 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

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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
Spokane 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 julio 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$653Average$1,049FlexibilityNo cancel feeOn-time69%
Turkish AirlinesCheapest$664Average$955FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$674Average$956FlexibilityNo cancel feeOn-time76%
KLMCheapest$719Average$942FlexibilityNo cancel feeOn-time75%

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