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$531+ 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
Jan 27 — Feb 31
Tue 1/27
Tue 2/3
1 adult, Economy
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Cheap flight deals from Seattle to Bulgaria

Best flights from Seattle to Bulgaria
Discover carefully curated flight deals from Seattle to Bulgaria that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 28, 2025.

This United Airlines deal was found by Cheapflights users on 12/25. 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.
Wed 4/16:50 pmSEA - SOF
1 stop18h 20mUnited Airlines
Wed 4/86:20 amSOF - SEA
1 stop16h 00mUnited Airlines
Deal found 12/25$531
This Turkish Airlines deal was found by Cheapflights users on 12/26. 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.
Wed 2/257:00 pmSEA - VAR
1 stop15h 35mTurkish Airlines
Sun 3/110:00 amVAR - SEA
1 stop17h 05mTurkish Airlines
Deal found 12/26$776
This United Airlines deal was found by Cheapflights users on 12/26. 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.
Wed 3/49:00 amSEA - SOF
3 stops27h 45mUnited Airlines
Sun 3/86:05 amSOF - SEA
1 stop17h 15mUnited Airlines
Deal found 12/26$538
This United Airlines deal was found by Cheapflights users on 12/26. 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.
Sun 2/17:00 amSEA - SOF
2 stops25h 20mUnited Airlines
Sat 2/146:25 amSOF - SEA
2 stops25h 51mUnited Airlines
Deal found 12/26$542

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 December 28, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$531
(United Airlines)

Popular in

June

Cheapest in

October

Average price

$909
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
Highest demand for flights based on searches. 15% potential increase in price ($147 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($26 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 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 December 28, 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

6:50 pm-11:10 pm

1 stop18h 20m

Sofia

Wed 4/8

6:20 am-12:20 pm

1 stop16h 00m

$531

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Wed 3/4

9:00 am-10:45 pm

3 stops27h 45m

Sofia

Sun 3/8

6:05 am-1:20 pm

1 stop17h 15m

$538

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Sun 2/1

7:00 am-6:20 pm

2 stops25h 20m

Sofia

Sat 2/14

6:25 am-10:16 pm

2 stops25h 51m

$542

SeattleVarna

SEA - VAR

SEAVAR

Seattle/Tacoma Intl

Wed 2/25

7:00 pm-8:35 pm

1 stop15h 35m

Varna

Sun 3/1

10:00 am-5:05 pm

1 stop17h 05m

$776

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/25

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 $512). 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.

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 December 28, 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
1,435 reviews

Crew

8.4

Food

7.2

Comfort

7.6

Entertainment

7.1

Boarding

7.7

Overall

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
KLM
7.7
Good
1,435 reviews
KLM
7.7
Good
1,435 reviews

Crew

8.4

Food

7.2

Comfort

7.6

Entertainment

7.1

Boarding

7.7

Overall

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
Air France
7.4
Good
1,515 reviews
KLM
7.7
Good
1,435 reviews

Crew

8.4

Food

7.2

Comfort

7.6

Entertainment

7.1

Boarding

7.7

Overall

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
United Airlines
7.4
Good
9,116 reviews
KLM
7.7
Good
1,435 reviews

Crew

8.4

Food

7.2

Comfort

7.6

Entertainment

7.1

Boarding

7.7

Overall

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
Turkish Airlines
7.3
Good
4,122 reviews
KLM
7.7
Good
1,435 reviews

Crew

8.4

Food

7.2

Comfort

7.6

Entertainment

7.1

Boarding

7.7

Overall

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
Lufthansa
6.8
Okay
7,657 reviews
KLM
7.7
Good
1,435 reviews

Crew

8.4

Food

7.2

Comfort

7.6

Entertainment

7.1

Boarding

7.7

Overall

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle

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 15h 35m. United Airlines provides one of the quickest options available for as low as $776. 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 - Bourgas or Seattle/Tacoma Intl - Varna, 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 $512). 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.

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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 December 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$541Average$1,054FlexibilityNo cancel feeOn-time76%
Air FranceCheapest$555Average$718FlexibilityNo cancel feeOn-time77%
Turkish AirlinesCheapest$587Average$950FlexibilityNo cancel feeOn-time77%
KLMCheapest$615Average$908FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$621Average$885FlexibilityNo cancel feeOn-time69%

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