HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Bulgaria

$289+ 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 6/6. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SOF
Jun 9 — Jun 161
Tue 6/9
Tue 6/16
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Seattle to Bulgaria with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 10, 2026.

This Lufthansa deal was found by Cheapflights users on 5/7. 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 8/266:50 pm
SEA
-
SOF
1 stop18h 25m
Lufthansa
Thu 9/106:10 am
SOF
-
SEA
1 stop20h 49m
Lufthansa
Deal found 5/7$547
This Lufthansa deal was found by Cheapflights users on 5/9. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/192:00 pm
SEA
-
SOF
1 stop13h 45m
Lufthansa
Wed 11/256:10 am
SOF
-
SEA
1 stop16h 00m
Lufthansa
Deal found 5/9$617
This FlightHub deal was found by Cheapflights users on 5/6. 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 9/67:10 pm
SEA
-
SOF
1 stop27h 35m
Turkish Airlines
Tue 9/223:50 pm
SOF
-
SEA
1 stop35h 25m
Turkish Airlines
Deal found 5/6$707
This Justfly.com deal was found by Cheapflights users on 5/5. 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.
Tue 7/287:10 pm
SEA
-
SOF
1 stop27h 35m
Turkish Airlines
Fri 9/182:05 pm
SOF
-
SEA
1 stop37h 10m
Turkish Airlines
Deal found 5/5$726
This FlightHub deal was found by Cheapflights users on 5/7. 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 7/287:10 pm
SEA
-
SOF
1 stop27h 35m
Turkish Airlines
Mon 9/213:50 pm
SOF
-
SEA
1 stop35h 25m
Turkish Airlines
Deal found 5/7$744
This FlightHub deal was found by Cheapflights users on 5/9. 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.
Wed 11/183:10 pm
SEA
-
SOF
1 stop17h 10m
Lufthansa
Thu 11/266:10 am
SOF
-
SEA
1 stop16h 00m
Lufthansa
Deal found 5/9$747
This United Airlines deal was found by Cheapflights users on 5/9. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/153:10 pm
SEA
-
SOF
1 stop21h 35m
United Airlines
Wed 11/256:10 am
SOF
-
SEA
1 stop16h 00m
United Airlines
Deal found 5/9$748
This FlightHub deal was found by Cheapflights users on 5/10. 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.
Sun 8/27:10 pm
SEA
-
VAR
1 stop27h 20m
Turkish Airlines
Tue 9/159:20 am
VAR
-
SEA
1 stop17h 55m
Turkish Airlines
Deal found 5/10$790
This KAYAK deal was found by Cheapflights users on 5/8. 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.
Sat 9/57:00 am
SEA
-
BOJ
2 stops19h 20m
Austrian Airlines
Sat 9/1911:20 am
BOJ
-
SEA
2 stops41h 39m
Austrian Airlines
Deal found 5/8$955
This Justfly.com deal was found by Cheapflights users on 5/9. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/131:21 pm
SEA
-
VAR
2 stops51h 34m
Turkish Airlines
Wed 5/2710:10 pm
VAR
-
SEA
1 stop29h 05m
Turkish Airlines
Deal found 5/9$957
This KAYAK deal was found by Cheapflights users on 5/9. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/112:10 pm
SEA
-
VAR
2 stops39h 05m
Lufthansa
Fri 5/299:45 am
VAR
-
SEA
1 stop17h 14m
Lufthansa
Deal found 5/9$966
This KAYAK deal was found by Cheapflights users on 5/9. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/132:10 pm
SEA
-
VAR
2 stops32h 50m
Lufthansa
Fri 5/299:45 am
VAR
-
SEA
1 stop17h 14m
Lufthansa
Deal found 5/9$972

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 10, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$547
(Lufthansa)

One-way from

$289
(Kiwi.com)

Popular in

June

Cheapest in

October

Average price

$734
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. 21% potential increase in price ($204 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($43 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 10, 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

Sun 9/6

3:51 pm-11:15 pm

2 stops21h 24m

Sofia

Tue 9/22

6:10 am-11:55 am

1 stop15h 45m

$770

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Mon 9/14

3:51 pm-11:15 pm

2 stops21h 24m

Sofia

Fri 9/18

6:20 am-11:55 am

1 stop15h 35m

$771

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Tue 8/25

6:50 pm-6:40 pm

1 stop13h 50m

Sofia

Fri 8/28

6:10 am-5:42 pm

2 stops21h 32m

$777

SeattleVarna

SEA - VAR

SEAVAR

Seattle/Tacoma Intl

Sun 8/2

7:10 pm-2:55 am

1 stop21h 45m

Varna

Tue 9/15

9:20 am-5:15 pm

1 stop17h 55m

$790
Quickest round-trip

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Tue 7/28

6:50 pm-11:15 pm

1 stop18h 25m

Sofia

Thu 9/24

6:30 am-11:55 am

1 stop15h 25m

$826

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Tue 7/28

6:50 pm-11:15 pm

1 stop18h 25m

Sofia

Fri 9/25

6:20 am-2:22 pm

2 stops18h 02m

$826

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Mon 7/27

3:40 pm-11:15 pm

2 stops21h 35m

Sofia

Wed 9/16

6:20 am-11:55 am

1 stop15h 35m

$830

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Wed 7/29

3:40 pm-11:15 pm

2 stops21h 35m

Sofia

Fri 9/25

6:20 am-6:32 pm

2 stops22h 12m

$830

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Mon 7/27

3:40 pm-11:15 pm

2 stops21h 35m

Sofia

Fri 9/25

6:20 am-11:55 am

1 stop15h 35m

$830

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Sat 8/15

10:47 pm-6:40 pm

2 stops33h 53m

Sofia

Mon 8/31

6:10 am-9:35 am

2 stops37h 25m

$848

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/8

Showing 1-10 of 41 resultsSorted by cheapest first
1
2
3
...
5

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

How far ahead should I book a flight from Seattle to Bulgaria?

Booking 16 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.

What is the cheapest month to book a flight from Seattle to Bulgaria?

Currently, April is the cheapest month in which you can book a flight from Seattle to Bulgaria (average of $481). 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.

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 10, 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
1,513 reviews

Overall

7.8

Crew

8.4

Boarding

7.8

Comfort

7.7

Entertainment

7.2

Food

7.3

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
1,513 reviews
KLM
7.8
Good
1,513 reviews

Overall

7.8

Crew

8.4

Boarding

7.8

Comfort

7.7

Entertainment

7.2

Food

7.3

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
916 reviews
KLM
7.8
Good
1,513 reviews

Overall

7.8

Crew

8.4

Boarding

7.8

Comfort

7.7

Entertainment

7.2

Food

7.3

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
4,356 reviews
KLM
7.8
Good
1,513 reviews

Overall

7.8

Crew

8.4

Boarding

7.8

Comfort

7.7

Entertainment

7.2

Food

7.3

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
9,694 reviews
KLM
7.8
Good
1,513 reviews

Overall

7.8

Crew

8.4

Boarding

7.8

Comfort

7.7

Entertainment

7.2

Food

7.3

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
7,986 reviews
KLM
7.8
Good
1,513 reviews

Overall

7.8

Crew

8.4

Boarding

7.8

Comfort

7.7

Entertainment

7.2

Food

7.3

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 19h 20m. United Airlines provides one of the quickest options available for as low as $955. Seattle and Bulgaria are separated by a distance of 5946 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, April is the cheapest month in which you can book a flight from Seattle to Bulgaria (average of $481). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 10, 2026.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$538Average$908FlexibilityNo cancel feeOn-time75%
LufthansaCheapest$540Average$1,088FlexibilityNo cancel feeOn-time76%
Turkish AirlinesCheapest$573Average$871FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$620Average$840FlexibilityNo cancel feeOn-time69%
Austrian AirlinesCheapest$884Average$897FlexibilityNo cancel feeOn-time78%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.