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$351+ Cheap flights from Seattle (SEA) to Bulgaria

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 9/18. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SOF
Aug 21 — Aug 281
Fri 8/21
Fri 8/28
1 adult, Economy
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Cheap flight deals from Seattle to Bulgaria

Cheapest flights from Seattle to Bulgaria
Explore the most affordable flight options available from Seattle to Bulgaria. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 22, 2026.

This Justfly.com deal was found by Cheapflights users on 7/19. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/87:15 pm
SEA
-
SOF
1 stop33h 45m
Turkish Airlines
Tue 10/203:50 pm
SOF
-
SEA
1 stop35h 30m
Turkish Airlines
Deal found 7/19$689
This Turkish Airlines deal was found by Cheapflights users on 7/21. 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.
Mon 9/712:35 pm
SEA
-
SOF
1 stop16h 25m
Turkish Airlines
Tue 9/223:50 pm
SOF
-
SEA
1 stop35h 30m
Turkish Airlines
Deal found 7/21$699
This deal was found by Cheapflights users on 7/20. 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 7/20$723
This Justfly.com deal was found by Cheapflights users on 7/18. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/67:15 pm
SEA
-
SOF
1 stop33h 45m
Turkish Airlines
Tue 9/223:50 pm
SOF
-
SEA
1 stop35h 30m
Turkish Airlines
Deal found 7/18$729
This Turkish Airlines deal was found by Cheapflights users on 7/21. 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 7/21$739
This Turkish Airlines deal was found by Cheapflights users on 7/17. 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.
Sat 10/37:15 pm
SEA
-
SOF
1 stop15h 05m
Turkish Airlines
Fri 10/239:35 am
SOF
-
SEA
1 stop17h 45m
Turkish Airlines
Deal found 7/17$754
This Justfly.com deal was found by Cheapflights users on 7/17. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/57:15 pm
SEA
-
SOF
1 stop15h 05m
Turkish Airlines
Wed 10/219:10 pm
SOF
-
SEA
1 stop30h 10m
Turkish Airlines
Deal found 7/17$764
This Turkish Airlines deal was found by Cheapflights users on 7/17. 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.
Sat 10/37:15 pm
SEA
-
SOF
1 stop15h 05m
Turkish Airlines
Sun 10/189:35 am
SOF
-
SEA
1 stop17h 45m
Turkish Airlines
Deal found 7/17$779
This Gotogate deal was found by Cheapflights users on 7/20. 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 10/710:30 am
SEA
-
SOF
2 stops22h 10m
Multiple Airlines
Mon 10/197:25 pm
SOF
-
SEA
1 stop31h 34m
Multiple Airlines
Deal found 7/20$805
This oojo deal was found by Cheapflights users on 7/19. 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.
Tue 8/186:50 pm
SEA
-
SOF
1 stop18h 25m
Lufthansa
Thu 9/246:30 am
SOF
-
SEA
2 stops22h 02m
Lufthansa
Deal found 7/19$807
This KAYAK deal was found by Cheapflights users on 7/19. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/167:15 pm
SEA
-
VAR
1 stop27h 15m
Turkish Airlines
Mon 9/289:20 am
VAR
-
SEA
1 stop18h 00m
Turkish Airlines
Deal found 7/19$880
This KAYAK deal was found by Cheapflights users on 7/19. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/166:50 pm
SEA
-
VAR
2 stops34h 25m
Lufthansa
Mon 9/288:20 pm
VAR
-
SEA
1 stop25h 35m
Lufthansa
Deal found 7/19$899

Find flight deals from Seattle to Bulgaria

Keep the following information in mind while searching for Seattle to Bulgaria flight deals. Data was last updated July 22, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$689
(Justfly.com)

One-way from

$351
(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 Bulgaria
Search Deals
One-way flight from Seattle/Tacoma Intl to Bulgaria
Search Deals
Highest demand for flights based on searches. 19% potential increase in price ($183 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 Bulgaria 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 22, 2026.
Use the filters below to find and compare flights from Seattle to Bulgaria that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Wed 10/7

7:15 pm-8:45 am

1 stop27h 30m

Sofia

Mon 10/19

9:10 pm-5:20 pm

1 stop30h 10m

$689

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

Tue 1/12

7:05 pm-8:55 pm

1 stop15h 50m

Sofia

Fri 2/5

9:45 pm-5:10 pm

1 stop29h 25m

$699

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Mon 9/7

12:35 pm-3:00 pm

1 stop16h 25m

Sofia

Tue 9/22

3:50 pm-5:20 pm

1 stop35h 30m

$699
Quickest round-trip

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Tue 8/18

7:15 pm-8:20 pm

1 stop15h 05m

Sofia

Thu 9/24

9:35 am-5:20 pm

1 stop17h 45m

$729

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

$747

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Mon 1/11

12:15 pm-6:20 pm

2 stops20h 05m

Sofia

Thu 1/14

6:25 am-12:00 pm

1 stop15h 35m

$751

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Wed 10/7

7:15 pm-8:20 pm

1 stop15h 05m

Sofia

Fri 10/23

9:35 am-5:20 pm

1 stop17h 45m

$754

SeattleVarna

SEA - VAR

SEAVAR

Seattle/Tacoma Intl

Wed 9/16

6:50 pm-3:15 pm

2 stops34h 25m

Varna

Mon 9/28

8:20 pm-11:55 am

1 stop25h 35m

$899

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/17

Showing 1-10 of 32 resultsSorted by cheapest first
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Best time to book a flight from Seattle to Bulgaria

Have a flexible travel schedule? Discover the best time to fly to Bulgaria 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 Bulgaria

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

Currently, October is the cheapest month in which you can book a flight from Seattle to Bulgaria (average of $587). Flying from Seattle to Bulgaria 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 far ahead should I book a flight from Seattle to Bulgaria?

Booking 16 days in advance of your planned departure date is, on average, the best time to get cheap flights from Seattle to Bulgaria. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

Reviews of airlines servicing Bulgaria

Get insights into the airlines that provide service to Bulgaria. 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 Bulgaria. Reviews last updated July 22, 2026.
Read reviews from past customers who have flown KLM,Austrian Airlines, andTurkish Airlines from Seattle to Bulgaria. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.8
Good
1,544 reviews

Comfort

7.7

Food

7.3

Entertainment

7.2

Crew

8.4

Boarding

7.8

Overall

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
1,544 reviews
KLM
7.8
Good
1,544 reviews

Comfort

7.7

Food

7.3

Entertainment

7.2

Crew

8.4

Boarding

7.8

Overall

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
Austrian Airlines
7.6
Good
950 reviews
KLM
7.8
Good
1,544 reviews

Comfort

7.7

Food

7.3

Entertainment

7.2

Crew

8.4

Boarding

7.8

Overall

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
4,449 reviews
KLM
7.8
Good
1,544 reviews

Comfort

7.7

Food

7.3

Entertainment

7.2

Crew

8.4

Boarding

7.8

Overall

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
10,020 reviews
KLM
7.8
Good
1,544 reviews

Comfort

7.7

Food

7.3

Entertainment

7.2

Crew

8.4

Boarding

7.8

Overall

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
8,158 reviews
KLM
7.8
Good
1,544 reviews

Comfort

7.7

Food

7.3

Entertainment

7.2

Crew

8.4

Boarding

7.8

Overall

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 Bulgaria. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Seattle to Bulgaria?

    Seattle/Tacoma Intl (SEA), located 11.4 mi from the city center, is the airport you fly out of when you book flights from Seattle to Bulgaria.

  • How long is the flight from Seattle to Bulgaria?

    A quick flight from Seattle to Bulgaria can take about 21h 05m. Turkish Airlines provides one of the quickest options available for as low as $943. Seattle and Bulgaria are separated by a distance of 5946 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the most popular routes from Seattle to Bulgaria?

    While some choose either Seattle/Tacoma Intl - Varna or Seattle/Tacoma Intl - Bourgas, Seattle/Tacoma Intl - Sofia is the most popular route from Seattle to Bulgaria.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Seattle to Bulgaria 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 Bulgaria?

    Currently, October is the cheapest month in which you can book a flight from Seattle to Bulgaria (average of $587). Flying from Seattle to Bulgaria 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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Top 5 airlines flying from Seattle to Bulgaria

Discover the top 5 airlines that operate flights from Seattle to Bulgaria. 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 22, 2026.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$538Average$908FlexibilityNo cancel feeOn-time75%
LufthansaCheapest$540Average$916FlexibilityNo cancel feeOn-time76%
Turkish AirlinesCheapest$571Average$856FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$620Average$885FlexibilityNo cancel feeOn-time69%
Austrian AirlinesCheapest$884Average$897FlexibilityNo cancel feeOn-time78%

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