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Bulgaria

$315+ 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 6/10. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SOF
Mar 28 — Apr 41
Sat 3/28
Sat 4/4
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 26, 2026.

This FlightHub deal was found by Cheapflights users on 2/25. 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 10m
Lufthansa
Tue 9/226:10 am
SOF
-
SEA
2 stops18h 12m
Lufthansa
Deal found 2/25$539
This Air France deal was found by Cheapflights users on 2/25. 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.
Sun 9/66:45 pm
SEA
-
SOF
1 stop33h 15m
Multiple Airlines
Tue 9/227:00 am
SOF
-
SEA
1 stop14h 47m
Multiple Airlines
Deal found 2/25$544
This United Airlines deal was found by Cheapflights users on 2/25. 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.
Mon 8/2411:11 am
SEA
-
SOF
2 stops25h 49m
United Airlines
Tue 10/66:10 am
SOF
-
SEA
2 stops18h 12m
United Airlines
Deal found 2/25$551
This United Airlines deal was found by Cheapflights users on 2/25. 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.
Mon 8/243:51 pm
SEA
-
SOF
2 stops21h 09m
United Airlines
Wed 10/712:55 pm
SOF
-
SEA
1 stop14h 04m
United Airlines
Deal found 2/25$552
This United Airlines deal was found by Cheapflights users on 2/25. 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 8/238:00 am
SEA
-
SOF
2 stops18h 10m
United Airlines
Tue 10/612:55 pm
SOF
-
SEA
1 stop14h 04m
United Airlines
Deal found 2/25$555
This United Airlines deal was found by Cheapflights users on 2/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/152:00 pm
SEA
-
SOF
1 stop22h 45m
United Airlines
Tue 1/56:10 am
SOF
-
SEA
1 stop16h 00m
United Airlines
Deal found 2/26$559
This United Airlines deal was found by Cheapflights users on 2/22. 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 12/155:30 pm
SEA
-
SOF
2 stops19h 15m
United Airlines
Wed 1/66:10 am
SOF
-
SEA
2 stops27h 49m
United Airlines
Deal found 2/22$561
This United Airlines deal was found by Cheapflights users on 2/25. 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 8/235:15 am
SEA
-
SOF
2 stops26h 55m
United Airlines
Fri 10/26:20 am
SOF
-
SEA
1 stop16h 00m
United Airlines
Deal found 2/25$563
This United Airlines deal was found by Cheapflights users on 2/25. 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 8/235:15 am
SEA
-
SOF
2 stops26h 55m
United Airlines
Wed 10/712:55 pm
SOF
-
SEA
1 stop14h 04m
United Airlines
Deal found 2/25$564
This United Airlines deal was found by Cheapflights users on 2/25. 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.
Mon 8/243:51 pm
SEA
-
SOF
2 stops21h 09m
United Airlines
Mon 10/512:55 pm
SOF
-
SEA
2 stops42h 09m
United Airlines
Deal found 2/25$570
This FlightHub deal was found by Cheapflights users on 2/24. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/47:00 am
SEA
-
VAR
2 stops22h 15m
Austrian Airlines
Mon 5/114:00 pm
VAR
-
SEA
2 stops38h 53m
Austrian Airlines
Deal found 2/24$626
This Justfly.com deal was found by Cheapflights users on 2/25. 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 5/47:00 am
SEA
-
VAR
2 stops22h 15m
Multiple Airlines
Mon 5/114:00 pm
VAR
-
SEA
2 stops30h 20m
Multiple Airlines
Deal found 2/25$639

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 26, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$551
(United Airlines)

One-way from

$315
(Kiwi.com)

Popular in

June

Cheapest in

October

Average price

$664
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 ($192 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 26, 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

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Tue 8/25

7:00 am-6:40 pm

2 stops25h 40m

Sofia

Fri 10/2

6:20 am-10:22 pm

2 stops26h 02m

$551

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Tue 8/25

8:35 am-6:40 pm

2 stops24h 05m

Sofia

Thu 10/8

6:30 am-12:20 pm

1 stop15h 50m

$551

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Tue 8/25

8:35 am-6:40 pm

2 stops24h 05m

Sofia

Wed 10/7

6:10 am-9:04 pm

2 stops24h 54m

$560

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Mon 8/24

3:51 pm-11:00 pm

2 stops21h 09m

Sofia

Mon 10/5

12:55 pm-9:04 pm

2 stops42h 09m

$570

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Tue 4/28

1:45 pm-2:00 pm

1 stop14h 15m

Sofia

Thu 5/7

7:00 am-11:42 am

1 stop14h 42m

$591

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Wed 4/22

7:00 am-11:00 pm

2 stops30h 00m

Sofia

Mon 4/27

2:20 pm-8:53 pm

2 stops40h 33m

$624

SeattleVarna

SEA - VAR

SEAVAR

Seattle/Tacoma Intl

Mon 5/4

7:00 am-3:15 pm

2 stops22h 15m

Varna

Mon 5/11

4:00 pm-8:53 pm

2 stops38h 53m

$626

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Wed 4/22

8:20 pm-1:25 pm

1 stop31h 05m

Sofia

Mon 4/27

8:10 pm-10:38 pm

2 stops36h 28m

$629

SeattleVarna

SEA - VAR

SEAVAR

Seattle/Tacoma Intl

Mon 5/4

7:00 am-3:15 pm

2 stops22h 15m

Varna

Mon 5/11

4:00 pm-12:20 pm

2 stops30h 20m

$639

SeattleVarna

SEA - VAR

SEAVAR

Seattle/Tacoma Intl

Wed 4/8

7:10 pm-8:45 am

1 stop27h 35m

Varna

Wed 4/15

10:10 pm-5:15 pm

1 stop29h 05m

$646

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/23

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, 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 26, 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
1,460 reviews

Boarding

7.8

Overall

7.7

Crew

8.4

Food

7.3

Entertainment

7.1

Comfort

7.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
KLM
7.7
Good
1,460 reviews
KLM
7.7
Good
1,460 reviews

Boarding

7.8

Overall

7.7

Crew

8.4

Food

7.3

Entertainment

7.1

Comfort

7.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
Air France
7.4
Good
1,538 reviews
KLM
7.7
Good
1,460 reviews

Boarding

7.8

Overall

7.7

Crew

8.4

Food

7.3

Entertainment

7.1

Comfort

7.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
United Airlines
7.4
Good
9,349 reviews
KLM
7.7
Good
1,460 reviews

Boarding

7.8

Overall

7.7

Crew

8.4

Food

7.3

Entertainment

7.1

Comfort

7.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
Turkish Airlines
7.3
Good
4,239 reviews
KLM
7.7
Good
1,460 reviews

Boarding

7.8

Overall

7.7

Crew

8.4

Food

7.3

Entertainment

7.1

Comfort

7.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
Lufthansa
6.8
Okay
7,814 reviews
KLM
7.7
Good
1,460 reviews

Boarding

7.8

Overall

7.7

Crew

8.4

Food

7.3

Entertainment

7.1

Comfort

7.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas

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 22h 15m. United Airlines provides one of the quickest options available for as low as $626. Seattle and Bulgaria are separated by a distance of 5908 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

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 February 26, 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$540Average$1,078FlexibilityNo cancel feeOn-time76%
KLMCheapest$552Average$859FlexibilityNo cancel feeOn-time75%
Air FranceCheapest$555Average$718FlexibilityNo cancel feeOn-time77%
Turkish AirlinesCheapest$587Average$838FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$620Average$840FlexibilityNo cancel feeOn-time69%

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