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$593+ Cheap flights from Seattle (SEA) to Bulgaria

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/1. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SOF
Dec 17 — Dec 241
Wed 12/17
Wed 12/24
1 adult, Economy
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Find 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 November 17, 2025.

This United Airlines deal was found by Cheapflights users on 11/14. 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.
Fri 12/128:10 amSEA - SOF
2 stops28h 35mUnited Airlines
Tue 1/132:00 pmSOF - SEA
1 stop33h 20mUnited Airlines
Deal found 11/14$637
This United Airlines deal was found by Cheapflights users on 11/14. 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.
Fri 12/128:10 amSEA - SOF
2 stops28h 35mUnited Airlines
Fri 1/162:35 pmSOF - SEA
2 stops20h 24mUnited Airlines
Deal found 11/14$644
This United Airlines deal was found by Cheapflights users on 11/14. 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.
Fri 12/128:10 amSEA - SOF
2 stops28h 35mUnited Airlines
Mon 1/126:05 amSOF - SEA
2 stops24h 52mUnited Airlines
Deal found 11/14$646
This United Airlines deal was found by Cheapflights users on 11/15. 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.
Fri 12/2611:39 pmSEA - SOF
2 stops37h 06mUnited Airlines
Wed 1/146:05 amSOF - SEA
1 stop17h 15mUnited Airlines
Deal found 11/15$649
This United Airlines deal was found by Cheapflights users on 11/15. 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.
Fri 12/2611:39 pmSEA - SOF
2 stops37h 06mUnited Airlines
Thu 1/156:00 amSOF - SEA
3 stops26h 43mUnited Airlines
Deal found 11/15$650
This United Airlines deal was found by Cheapflights users on 11/15. 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.
Fri 12/2611:39 pmSEA - SOF
2 stops37h 06mUnited Airlines
Mon 1/121:45 pmSOF - SEA
2 stops21h 11mUnited Airlines
Deal found 11/15$653
This United Airlines deal was found by Cheapflights users on 11/14. 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.
Fri 12/128:10 amSEA - SOF
2 stops28h 35mUnited Airlines
Wed 1/142:00 pmSOF - SEA
3 stops42h 43mUnited Airlines
Deal found 11/14$656
This United Airlines deal was found by Cheapflights users on 11/14. 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.
Fri 12/128:10 amSEA - SOF
2 stops28h 35mUnited Airlines
Wed 1/212:00 pmSOF - SEA
3 stops35h 44mUnited Airlines
Deal found 11/14$658
This United Airlines deal was found by Cheapflights users on 11/15. 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.
Fri 12/2611:39 pmSEA - SOF
2 stops37h 06mUnited Airlines
Tue 1/132:00 pmSOF - SEA
1 stop33h 20mUnited Airlines
Deal found 11/15$659
This United Airlines deal was found by Cheapflights users on 11/14. 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.
Fri 12/128:10 amSEA - SOF
2 stops28h 35mUnited Airlines
Sat 1/177:55 amSOF - SEA
2 stops23h 02mUnited Airlines
Deal found 11/14$661
This KAYAK deal was found by Cheapflights users on 11/16. 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 12/33:10 pmSEA - VAR
2 stops38h 05mLufthansa
Mon 12/154:00 pmVAR - SEA
2 stops30h 10mLufthansa
Deal found 11/16$790
This KAYAK deal was found by Cheapflights users on 11/16. 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 12/12:00 pmSEA - VAR
2 stops39h 15mLufthansa
Mon 12/154:00 pmVAR - SEA
2 stops30h 10mLufthansa
Deal found 11/16$803

Cheap flight deals from Seattle to Bulgaria

Keep the following information in mind while searching for Seattle to Bulgaria flight deals. Data was last updated November 17, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$593
(FlightHub)

Popular in

December

Cheapest in

October

Average price

$678
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
High demand for flights, 3% potential price rise
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($25 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
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 November 17, 2025.
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

7:10 pm-3:00 pm

1 stop33h 50m

Sofia

Wed 4/8

3:50 pm-5:15 pm

1 stop35h 25m

$593

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Tue 3/10

8:00 pm-8:45 am

1 stop27h 45m

Sofia

Tue 3/31

9:05 pm-5:15 pm

1 stop30h 10m

$593

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Thu 1/1

1:55 pm-10:45 pm

2 stops22h 50m

Sofia

Thu 1/8

6:00 am-10:43 pm

3 stops26h 43m

$610

SeattleVarna

SEA - VAR

SEAVAR

Seattle/Tacoma Intl

Thu 1/22

2:00 pm-3:15 pm

2 stops39h 15m

Varna

Mon 1/26

4:00 pm-1:20 pm

2 stops55h 20m

$612

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Thu 1/1

2:00 pm-10:45 pm

1 stop22h 45m

Sofia

Thu 1/8

6:00 am-8:57 pm

2 stops24h 57m

$656

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Fri 12/26

11:39 pm-10:45 pm

2 stops37h 06m

Sofia

Tue 1/13

2:00 pm-1:20 pm

1 stop33h 20m

$659

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Wed 3/11

8:00 pm-3:10 pm

1 stop34h 10m

Sofia

Sun 3/15

4:00 pm-6:05 pm

1 stop35h 05m

$727

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Wed 4/1

6:50 pm-6:40 pm

1 stop13h 50m

Sofia

Wed 4/8

6:20 am-7:00 pm

2 stops22h 40m

$727

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Sun 12/7

8:10 am-10:45 pm

2 stops28h 35m

Sofia

Thu 1/15

6:00 am-12:10 pm

1 stop16h 10m

$733

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Tue 3/24

10:05 am-10:45 pm

2 stops27h 40m

Sofia

Tue 4/28

6:10 am-12:20 pm

1 stop16h 10m

$756

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/16

Showing 1-10 of 19 results
1
2

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, November is the cheapest month in which you can book a flight from Seattle to Bulgaria (average of $537). Flying from Seattle to Bulgaria in June is currently the most expensive (average of $943). 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.

What is the cheapest time of day to fly from SEA to BG?

Find hourly flight availability from Seattle to Bulgaria. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 17, 2025.

One of the essential ways to save on airfare from Seattle to Bulgaria is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the evening could potentially save you up to 39% on airfare.

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 November 17, 2025.
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
1,411 reviews

Food

7.3

Overall

7.7

Crew

8.4

Entertainment

7.1

Boarding

7.8

Comfort

7.7

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
KLM
7.7
Good
1,411 reviews
KLM
7.7
Good
1,411 reviews

Food

7.3

Overall

7.7

Crew

8.4

Entertainment

7.1

Boarding

7.8

Comfort

7.7

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
Air France
7.4
Good
1,492 reviews
KLM
7.7
Good
1,411 reviews

Food

7.3

Overall

7.7

Crew

8.4

Entertainment

7.1

Boarding

7.8

Comfort

7.7

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
United Airlines
7.4
Good
9,014 reviews
KLM
7.7
Good
1,411 reviews

Food

7.3

Overall

7.7

Crew

8.4

Entertainment

7.1

Boarding

7.8

Comfort

7.7

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
Turkish Airlines
7.3
Good
4,047 reviews
KLM
7.7
Good
1,411 reviews

Food

7.3

Overall

7.7

Crew

8.4

Entertainment

7.1

Boarding

7.8

Comfort

7.7

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
Lufthansa
6.8
Okay
7,576 reviews
KLM
7.7
Good
1,411 reviews

Food

7.3

Overall

7.7

Crew

8.4

Entertainment

7.1

Boarding

7.8

Comfort

7.7

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.

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 50m. Turkish Airlines provides one of the quickest options available for as low as $610. 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, November is the cheapest month in which you can book a flight from Seattle to Bulgaria (average of $537). Flying from Seattle to Bulgaria in June is currently the most expensive (average of $943). 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 November 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air FranceCheapest$555Average$718FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$562Average$1,074FlexibilityNo cancel feeOn-time76%
Turkish AirlinesCheapest$596Average$970FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$676Average$980FlexibilityNo cancel feeOn-time69%
KLMCheapest$719Average$942FlexibilityNo cancel feeOn-time75%

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