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Bulgaria

$355+ 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 6/29. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SOF
Mar 13 — Mar 201
Fri 3/13
Fri 3/20
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 February 11, 2026.

This Air France deal was found by Cheapflights users on 2/9. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/16:40 pm
SEA
-
SOF
1 stop33h 20m
Multiple Airlines
Wed 4/87:00 am
SOF
-
SEA
1 stop14h 45m
Multiple Airlines
Deal found 2/9$531
This United Airlines deal was found by Cheapflights users on 2/8. 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 4/56:50 pm
SEA
-
SOF
1 stop18h 20m
United Airlines
Tue 4/146:10 am
SOF
-
SEA
1 stop16h 10m
United Airlines
Deal found 2/8$532
This FlightHub deal was found by Cheapflights users on 2/10. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/12:10 pm
SEA
-
SOF
1 stop17h 55m
Lufthansa
Wed 4/86:20 am
SOF
-
SEA
1 stop16h 00m
Lufthansa
Deal found 2/10$534
This United Airlines deal was found by Cheapflights users on 2/8. 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.
Wed 4/18:00 am
SEA
-
SOF
2 stops18h 10m
United Airlines
Wed 4/86:20 am
SOF
-
SEA
1 stop16h 00m
United Airlines
Deal found 2/8$537
This United Airlines deal was found by Cheapflights users on 2/8. 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.
Wed 4/15:00 am
SEA
-
SOF
2 stops32h 10m
United Airlines
Fri 4/106:10 am
SOF
-
SEA
1 stop20h 49m
United Airlines
Deal found 2/8$539
This United Airlines deal was found by Cheapflights users on 2/8. 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.
Wed 4/18:00 am
SEA
-
SOF
2 stops18h 10m
United Airlines
Tue 4/146:10 am
SOF
-
SEA
3 stops27h 17m
United Airlines
Deal found 2/8$549
This KAYAK deal was found by Cheapflights users on 2/8. 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 4/12:10 pm
SEA
-
SOF
1 stop22h 40m
Lufthansa
Tue 4/146:10 am
SOF
-
SEA
1 stop16h 10m
Lufthansa
Deal found 2/8$550
This United Airlines deal was found by Cheapflights users on 2/8. 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.
Tue 12/159:05 am
SEA
-
SOF
2 stops23h 15m
United Airlines
Tue 1/56:10 am
SOF
-
SEA
1 stop16h 00m
United Airlines
Deal found 2/8$551
This FlightHub deal was found by Cheapflights users on 2/9. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/246:50 pm
SEA
-
VAR
2 stops34h 25m
Lufthansa
Fri 5/19:45 am
VAR
-
SEA
1 stop17h 14m
Lufthansa
Deal found 2/9$605
This Air France deal was found by Cheapflights users on 2/9. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/41:45 pm
SEA
-
VAR
2 stops63h 45m
Air France
Mon 5/118:30 am
VAR
-
SEA
1 stop19h 09m
Air France
Deal found 2/9$634
This FlightHub deal was found by Cheapflights users on 2/8. 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.
Tue 3/103:00 pm
SEA
-
VAR
2 stops39h 15m
Lufthansa
Wed 5/204:00 pm
VAR
-
SEA
2 stops30h 20m
Lufthansa
Deal found 2/8$649
This FlightHub deal was found by Cheapflights users on 2/11. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/42:10 pm
SEA
-
VAR
2 stops39h 05m
Multiple Airlines
Mon 5/114:00 pm
VAR
-
SEA
2 stops37h 00m
Multiple Airlines
Deal found 2/11$660

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 February 11, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$531
(Air France)

One-way from

$355
(Air France)

Popular in

June

Cheapest in

October

Average price

$644
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. 22% potential increase in price ($217 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 February 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 February 11, 2026.
Use the filters below to find and compare flights from Seattle to Bulgaria that are best for you.

Fly from

Seattle

Fly to

Bulgaria

Route

Depart

Return

Price

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Wed 4/1

6:40 pm-2:00 pm

1 stop33h 20m

Sofia

Wed 4/8

7:00 am-11:45 am

1 stop14h 45m

$531

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Wed 4/1

2:10 pm-6:05 pm

1 stop17h 55m

Sofia

Wed 4/8

6:20 am-12:20 pm

1 stop16h 00m

$534

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Wed 4/1

8:00 am-12:10 pm

2 stops18h 10m

Sofia

Wed 4/8

6:20 am-12:20 pm

1 stop16h 00m

$537

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Tue 3/24

5:00 am-6:20 pm

2 stops28h 20m

Sofia

Tue 4/28

6:10 am-12:20 pm

1 stop16h 10m

$561

SeattleVarna

SEA - VAR

SEAVAR

Seattle/Tacoma Intl

Fri 4/24

6:50 pm-3:15 pm

2 stops34h 25m

Varna

Fri 5/1

9:45 am-4:59 pm

1 stop17h 14m

$605

SeattleVarna

SEA - VAR

SEAVAR

Seattle/Tacoma Intl

Mon 5/4

1:45 pm-3:30 pm

2 stops63h 45m

Varna

Mon 5/11

8:30 am-11:55 pm

2 stops25h 25m

$638

SeattleVarna

SEA - VAR

SEAVAR

Seattle/Tacoma Intl

Tue 3/10

3:00 pm-3:15 pm

2 stops39h 15m

Varna

Wed 5/20

4:00 pm-12:20 pm

2 stops30h 20m

$649

SeattleVarna

SEA - VAR

SEAVAR

Seattle/Tacoma Intl

Mon 5/4

2:10 pm-3:15 pm

2 stops39h 05m

Varna

Mon 5/11

4:00 pm-7:00 pm

2 stops37h 00m

$660

SeattleVarna

SEA - VAR

SEAVAR

Seattle/Tacoma Intl

Sun 8/2

7:10 pm-2:45 am

1 stop21h 35m

Varna

Tue 9/15

9:35 am-5:15 pm

1 stop17h 40m

$681

SeattleVarna

SEA - VAR

SEAVAR

Seattle/Tacoma Intl

Fri 4/24

7:10 pm-8:45 am

1 stop27h 35m

Varna

Fri 5/1

9:35 am-5:15 pm

1 stop17h 40m

$682

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/8

Showing 1-10 of 22 results
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2
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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, July is the cheapest month in which you can book a flight from Seattle to Bulgaria (average of $510). Flying from Seattle to Bulgaria in June is currently the most expensive (average of $947). 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.

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 February 11, 2026.
Read reviews from past customers who have flown KLM, Air France, and United 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
7.7
Good
1,451 reviews

Comfort

7.6

Food

7.3

Entertainment

7.1

Overall

7.7

Crew

8.4

Boarding

7.8

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
KLM
7.7
Good
1,451 reviews
KLM
7.7
Good
1,451 reviews

Comfort

7.6

Food

7.3

Entertainment

7.1

Overall

7.7

Crew

8.4

Boarding

7.8

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
Air France
7.4
Good
1,531 reviews
KLM
7.7
Good
1,451 reviews

Comfort

7.6

Food

7.3

Entertainment

7.1

Overall

7.7

Crew

8.4

Boarding

7.8

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
United Airlines
7.4
Good
9,274 reviews
KLM
7.7
Good
1,451 reviews

Comfort

7.6

Food

7.3

Entertainment

7.1

Overall

7.7

Crew

8.4

Boarding

7.8

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
Turkish Airlines
7.3
Good
4,213 reviews
KLM
7.7
Good
1,451 reviews

Comfort

7.6

Food

7.3

Entertainment

7.1

Overall

7.7

Crew

8.4

Boarding

7.8

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
Lufthansa
6.8
Okay
7,777 reviews
KLM
7.7
Good
1,451 reviews

Comfort

7.6

Food

7.3

Entertainment

7.1

Overall

7.7

Crew

8.4

Boarding

7.8

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.

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 55m. Lufthansa provides one of the quickest options available for as low as $534. 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 - 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, July is the cheapest month in which you can book a flight from Seattle to Bulgaria (average of $510). Flying from Seattle to Bulgaria in June is currently the most expensive (average of $947). 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 Bulgaria

See prices for flight routes from nearby airports that may be better suited for you.
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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 February 11, 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$537Average$1,078FlexibilityNo cancel feeOn-time76%
Air FranceCheapest$555Average$718FlexibilityNo cancel feeOn-time77%
Turkish AirlinesCheapest$587Average$824FlexibilityNo cancel feeOn-time77%
KLMCheapest$615Average$908FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$620Average$885FlexibilityNo cancel feeOn-time69%

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