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$287+ 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 9/7. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SOF
Jun 28 — Jul 51
Sun 6/28
Sun 7/5
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 May 29, 2026.

This Lufthansa deal was found by Cheapflights users on 5/24. 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.
Wed 7/226:50 pm
SEA
-
SOF
1 stop13h 50m
Lufthansa
Mon 7/277:25 pm
SOF
-
SEA
1 stop31h 34m
Lufthansa
Deal found 5/24$601
This Lufthansa deal was found by Cheapflights users on 5/24. 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.
Fri 7/246:50 pm
SEA
-
SOF
1 stop13h 50m
Lufthansa
Wed 7/296:10 am
SOF
-
SEA
1 stop20h 49m
Lufthansa
Deal found 5/24$651
This oojo deal was found by Cheapflights users on 5/26. 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 11/42:50 pm
SEA
-
SOF
1 stop17h 30m
Lufthansa
Wed 11/186:25 am
SOF
-
SEA
1 stop15h 35m
Lufthansa
Deal found 5/26$740
This Air Canada deal was found by Cheapflights users on 5/26. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/47:45 am
SEA
-
SOF
2 stops24h 35m
Multiple Airlines
Wed 11/186:25 am
SOF
-
SEA
2 stops36h 52m
Multiple Airlines
Deal found 5/26$755
This oojo deal was found by Cheapflights users on 5/24. 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.
Sun 9/66:50 pm
SEA
-
SOF
1 stop18h 25m
Lufthansa
Tue 9/226:10 am
SOF
-
SEA
1 stop20h 49m
Lufthansa
Deal found 5/24$758
This FlightHub deal was found by Cheapflights users on 5/27. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/66:50 pm
SEA
-
SOF
1 stop18h 25m
Multiple Airlines
Tue 9/2212:55 pm
SOF
-
SEA
2 stops19h 47m
Multiple Airlines
Deal found 5/27$766
This Justfly.com deal was found by Cheapflights users on 5/29. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/26:50 pm
SEA
-
VAR
2 stops34h 25m
Lufthansa
Tue 9/154:00 pm
VAR
-
SEA
2 stops29h 55m
Lufthansa
Deal found 5/29$869
This Travelocity deal was found by Cheapflights users on 5/26. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/177:20 pm
SEA
-
VAR
2 stops37h 25m
Multiple Airlines
Mon 8/248:20 pm
VAR
-
SEA
1 stop25h 35m
Multiple Airlines
Deal found 5/26$885
This KAYAK deal was found by Cheapflights users on 5/26. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/171:57 pm
SEA
-
VAR
2 stops44h 48m
Lufthansa
Mon 8/248:20 pm
VAR
-
SEA
2 stops32h 47m
Lufthansa
Deal found 5/26$899
This KAYAK deal was found by Cheapflights users on 5/29. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/116:50 pm
SEA
-
VAR
1 stop15h 55m
Lufthansa
Sun 8/301:35 pm
VAR
-
SEA
2 stops32h 20m
Lufthansa
Deal found 5/29$905
This Justfly.com deal was found by Cheapflights users on 5/27. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/72:10 pm
SEA
-
VAR
2 stops15h 05m
Multiple Airlines
Tue 9/19:10 pm
VAR
-
SEA
2 stops35h 35m
Multiple Airlines
Deal found 5/27$915
This Turkish Airlines deal was found by Cheapflights users on 5/26. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/117:15 pm
SEA
-
VAR
1 stop16h 05m
Turkish Airlines
Sun 8/309:20 am
VAR
-
SEA
1 stop35h 20m
Turkish Airlines
Deal found 5/26$918

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 May 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$601
(Lufthansa)

One-way from

$287
(Kiwi.com)

Popular in

June

Cheapest in

October

Average price

$743
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. 20% potential increase in price ($199 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($41 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 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 May 29, 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 7/22

3:00 pm-6:40 pm

2 stops17h 40m

Sofia

Mon 7/27

7:25 pm-4:59 pm

1 stop31h 34m

$601

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Wed 11/4

2:50 pm-6:20 pm

1 stop17h 30m

Sofia

Wed 11/18

6:25 am-6:22 pm

2 stops21h 57m

$744

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Sun 9/6

3:54 pm-11:15 pm

2 stops21h 21m

Sofia

Tue 9/22

6:10 am-11:44 am

3 stops39h 34m

$791

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Mon 7/20

5:20 pm-11:15 pm

2 stops19h 55m

Sofia

Wed 9/23

6:20 am-11:26 pm

3 stops27h 06m

$857

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Thu 8/13

10:42 am-11:15 pm

2 stops26h 33m

Sofia

Thu 8/20

6:10 am-4:59 pm

1 stop20h 49m

$863

SeattleVarna

SEA - VAR

SEAVAR

Seattle/Tacoma Intl

Sun 8/2

6:50 pm-3:15 pm

2 stops34h 25m

Varna

Tue 9/15

4:00 pm-11:55 am

2 stops29h 55m

$869

SeattleBurgas

SEA - BOJ

SEABOJ

Seattle/Tacoma Intl

Mon 8/31

7:00 am-6:20 pm

2 stops25h 20m

Bourgas

Sun 9/13

9:50 am-4:59 pm

1 stop17h 09m

$900

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Sat 8/1

5:15 pm-11:15 pm

2 stops44h 00m

Sofia

Sat 8/29

6:10 am-4:59 pm

1 stop20h 49m

$903

SeattleVarna

SEA - VAR

SEAVAR

Seattle/Tacoma Intl

Tue 8/11

6:50 pm-8:45 pm

1 stop15h 55m

Varna

Sun 8/30

1:35 pm-11:55 am

2 stops32h 20m

$905

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Wed 7/22

3:00 pm-6:40 pm

2 stops17h 40m

Sofia

Tue 7/28

6:10 am-4:59 pm

1 stop20h 49m

$908

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/26

Showing 1-10 of 37 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, August is the cheapest month in which you can book a flight from Seattle to Bulgaria (average of $228). Flying from Seattle to Bulgaria in June is currently the most expensive (average of $716). 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 22 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 May 29, 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
1,524 reviews

Food

7.3

Boarding

7.8

Crew

8.4

Overall

7.8

Comfort

7.7

Entertainment

7.2

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
1,524 reviews
KLM
7.8
Good
1,524 reviews

Food

7.3

Boarding

7.8

Crew

8.4

Overall

7.8

Comfort

7.7

Entertainment

7.2

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
922 reviews
KLM
7.8
Good
1,524 reviews

Food

7.3

Boarding

7.8

Crew

8.4

Overall

7.8

Comfort

7.7

Entertainment

7.2

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
4,398 reviews
KLM
7.8
Good
1,524 reviews

Food

7.3

Boarding

7.8

Crew

8.4

Overall

7.8

Comfort

7.7

Entertainment

7.2

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
9,766 reviews
KLM
7.8
Good
1,524 reviews

Food

7.3

Boarding

7.8

Crew

8.4

Overall

7.8

Comfort

7.7

Entertainment

7.2

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
8,035 reviews
KLM
7.8
Good
1,524 reviews

Food

7.3

Boarding

7.8

Crew

8.4

Overall

7.8

Comfort

7.7

Entertainment

7.2

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 17h 40m. Lufthansa provides one of the quickest options available for as low as $601. Seattle and Bulgaria are separated by a distance of 5862 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 - Sofia or Seattle/Tacoma Intl - Bourgas, Seattle/Tacoma Intl - Varna 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, August is the cheapest month in which you can book a flight from Seattle to Bulgaria (average of $228). Flying from Seattle to Bulgaria in June is currently the most expensive (average of $716). 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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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 May 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$538Average$908FlexibilityNo cancel feeOn-time75%
LufthansaCheapest$540Average$1,150FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$545Average$885FlexibilityNo cancel feeOn-time69%
Turkish AirlinesCheapest$572Average$846FlexibilityNo cancel feeOn-time77%
Austrian AirlinesCheapest$884Average$897FlexibilityNo cancel feeOn-time78%

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