HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Bulgaria

$273+ 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 5/6. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SOF
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
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 January 29, 2026.

This Kiwi.com deal was found by Cheapflights users on 1/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/52:00 pm
SEA
-
SOF
1 stop13h 50m
Lufthansa
Wed 3/116:05 am
SOF
-
SEA
1 stop17h 15m
Lufthansa
Deal found 1/28$505
This FlightHub deal was found by Cheapflights users on 1/26. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/3010:10 am
SEA
-
SOF
2 stops22h 30m
Lufthansa
Wed 4/156:20 am
SOF
-
SEA
1 stop16h 00m
Lufthansa
Deal found 1/26$518
This FlightHub deal was found by Cheapflights users on 1/26. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/12:24 pm
SEA
-
SOF
2 stops22h 46m
Lufthansa
Wed 4/86:20 am
SOF
-
SEA
1 stop16h 00m
Lufthansa
Deal found 1/26$523
This Mytrip deal was found by Cheapflights users on 1/28. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/52:00 pm
SEA
-
SOF
1 stop13h 50m
Multiple Airlines
Wed 3/116:10 am
SOF
-
SEA
2 stops25h 06m
Multiple Airlines
Deal found 1/28$528
This Gotogate deal was found by Cheapflights users on 1/26. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/17:30 am
SEA
-
SOF
2 stops25h 10m
Multiple Airlines
Tue 9/156:10 am
SOF
-
SEA
2 stops18h 06m
Multiple Airlines
Deal found 1/26$529
This FlightHub deal was found by Cheapflights users on 1/26. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/12:24 pm
SEA
-
SOF
2 stops22h 46m
Multiple Airlines
Wed 4/811:05 am
SOF
-
SEA
2 stops22h 22m
Multiple Airlines
Deal found 1/26$532
This FlightHub deal was found by Cheapflights users on 1/26. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/23:00 pm
SEA
-
SOF
2 stops41h 10m
Lufthansa
Wed 11/186:10 am
SOF
-
SEA
1 stop16h 00m
Lufthansa
Deal found 1/26$533
This Justfly.com deal was found by Cheapflights users on 1/28. 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.
Fri 4/247:10 pm
SEA
-
VAR
1 stop16h 10m
Turkish Airlines
Fri 5/19:35 am
VAR
-
SEA
1 stop17h 40m
Turkish Airlines
Deal found 1/28$584
This KAYAK deal was found by Cheapflights users on 1/27. 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 5/62:10 pm
SEA
-
VAR
2 stops32h 50m
Lufthansa
Mon 5/114:00 pm
VAR
-
SEA
2 stops30h 20m
Lufthansa
Deal found 1/27$609
This FlightHub deal was found by Cheapflights users on 1/27. 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
2 stops22h 57m
Lufthansa
Deal found 1/27$610
This FlightHub deal was found by Cheapflights users on 1/27. 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 5/52:23 pm
SEA
-
VAR
2 stops20h 22m
Lufthansa
Mon 5/114:00 pm
VAR
-
SEA
2 stops30h 20m
Lufthansa
Deal found 1/27$624
This KAYAK deal was found by Cheapflights users on 1/27. 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 5/62:10 pm
SEA
-
VAR
2 stops32h 50m
Lufthansa
Wed 5/134:00 pm
VAR
-
SEA
2 stops30h 20m
Lufthansa
Deal found 1/27$626

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 January 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$505
(Kiwi.com)

One-way from

$273
(Lufthansa)

Popular in

June

Cheapest in

October

Average price

$615
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. 17% potential increase in price ($172 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($40 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 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 January 29, 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

Thu 3/5

2:00 pm-1:50 pm

1 stop13h 50m

Sofia

Wed 3/11

6:05 am-2:20 pm

1 stop17h 15m

$505

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

$523

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Wed 4/1

2:24 pm-11:10 pm

2 stops22h 46m

Sofia

Wed 4/8

6:20 am-12:20 pm

1 stop16h 00m

$523

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Mon 3/30

10:10 am-6:40 pm

2 stops22h 30m

Sofia

Wed 4/15

6:20 am-10:37 pm

2 stops26h 17m

$525

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Mon 3/30

6:40 pm-2:00 pm

1 stop33h 20m

Sofia

Wed 4/15

7:00 am-11:45 am

1 stop14h 45m

$531

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Sat 5/2

3:00 pm-6:10 pm

2 stops41h 10m

Sofia

Wed 11/18

6:10 am-12:10 pm

1 stop16h 00m

$533

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Wed 4/1

12:54 pm-11:10 pm

2 stops24h 16m

Sofia

Wed 4/8

6:20 am-12:20 pm

1 stop16h 00m

$537

SeattleVarna

SEA - VAR

SEAVAR

Seattle/Tacoma Intl

Fri 4/24

7:10 pm-9:20 pm

1 stop16h 10m

Varna

Fri 5/1

9:35 am-5:15 pm

1 stop17h 40m

$584

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-10:42 pm

2 stops22h 57m

$610

SeattleVarna

SEA - VAR

SEAVAR

Seattle/Tacoma Intl

Tue 5/5

8:00 am-8:45 pm

2 stops26h 45m

Varna

Tue 5/12

4:00 pm-12:20 pm

2 stops30h 20m

$624

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/27

Showing 1-10 of 29 results
1
2
3

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 $519). Flying from Seattle to Bulgaria in June is currently the most expensive (average of $949). 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 January 29, 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
1,443 reviews

Comfort

7.6

Crew

8.4

Boarding

7.8

Entertainment

7.1

Overall

7.7

Food

7.3

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
1,443 reviews
KLM
7.7
Good
1,443 reviews

Comfort

7.6

Crew

8.4

Boarding

7.8

Entertainment

7.1

Overall

7.7

Food

7.3

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
1,528 reviews
KLM
7.7
Good
1,443 reviews

Comfort

7.6

Crew

8.4

Boarding

7.8

Entertainment

7.1

Overall

7.7

Food

7.3

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
9,214 reviews
KLM
7.7
Good
1,443 reviews

Comfort

7.6

Crew

8.4

Boarding

7.8

Entertainment

7.1

Overall

7.7

Food

7.3

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
4,208 reviews
KLM
7.7
Good
1,443 reviews

Comfort

7.6

Crew

8.4

Boarding

7.8

Entertainment

7.1

Overall

7.7

Food

7.3

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
7,753 reviews
KLM
7.7
Good
1,443 reviews

Comfort

7.6

Crew

8.4

Boarding

7.8

Entertainment

7.1

Overall

7.7

Food

7.3

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 13h 50m. Lufthansa provides one of the quickest options available for as low as $505. 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 $519). Flying from Seattle to Bulgaria in June is currently the most expensive (average of $949). 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.

Alternative routes for Seattle to Bulgaria

See prices for flight routes from nearby airports that may be better suited for you.
Seattle to Heathrow flights
Seattle to Charles de Gaulle flights
Seattle to Istanbul flights
Seattle to Dublin flights
Seattle to Leonardo da Vinci/Fiumicino flights
Seattle to Gatwick flights
Portland to Heathrow flights
Seattle to Amsterdam flights
Seattle to Stansted flights
Seattle to Orly flights
Seattle to London City flights
Seattle to Athens flights
Seattle to Barcelona-El Prat flights
Seattle to Lisbon flights
Seattle to Sabiha Gokcen flights
Portland to Amsterdam flights
Seattle to Frankfurt flights
Portland to Gatwick flights
Seattle to Keflavik Intl flights
Seattle to Copenhagen flights
Seattle to Madrid flights
Seattle to Luton flights
Portland to Charles de Gaulle flights
Portland to Leonardo da Vinci/Fiumicino flights
Portland to London City flights
Portland to Dublin flights
Seattle to Malpensa flights
Seattle to Oslo Gardermoen flights
Portland to Orly flights
Seattle to Bruxelles-National flights
Seattle to Linate flights
Portland to Athens flights
Portland to Stansted flights
Portland to Barcelona-El Prat flights
Seattle to Munich flights
Seattle to Nice flights
Seattle to Geneva flights
Seattle to Zurich flights
Seattle to Vicenza flights
Seattle to Frederic Chopin flights
Portland to Lisbon flights
Portland to Madrid flights
Seattle to Prague flights
Seattle to Edinburgh flights
Seattle to Vienna flights
Seattle to Berlin flights
Seattle to Beauvais-Tille flights
Seattle to Arlanda flights
Seattle to Málaga flights
Seattle to Budapest flights

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 January 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$540Average$1,072FlexibilityNo cancel feeOn-time76%
Air FranceCheapest$555Average$718FlexibilityNo cancel feeOn-time77%
Turkish AirlinesCheapest$587Average$851FlexibilityNo cancel feeOn-time77%
KLMCheapest$615Average$908FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$620Average$840FlexibilityNo cancel feeOn-time69%

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.