HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Bulgaria

$383+ 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 5/23. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SOF
Dec 25 — Jan 11
Thu 12/25
Thu 1/1
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.

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 25, 2025.

This United Airlines deal was found by Cheapflights users on 11/25. 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.
Thu 12/257:05 amSEA - SOF
2 stops29h 40mUnited Airlines
Thu 1/156:00 amSOF - SEA
1 stop16h 10mUnited Airlines
Deal found 11/25$545
This United Airlines deal was found by Cheapflights users on 11/25. 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.
Thu 12/257:05 amSEA - SOF
2 stops29h 40mUnited Airlines
Fri 1/166:05 amSOF - SEA
1 stop17h 15mUnited Airlines
Deal found 11/25$547
This United Airlines deal was found by Cheapflights users on 11/25. 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.
Thu 12/257:05 amSEA - SOF
2 stops29h 40mUnited Airlines
Sun 1/186:10 amSOF - SEA
2 stops24h 47mUnited Airlines
Deal found 11/25$555
This United Airlines deal was found by Cheapflights users on 11/25. 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 12/2412:35 pmSEA - SOF
2 stops48h 10mUnited Airlines
Thu 1/156:00 amSOF - SEA
1 stop16h 10mUnited Airlines
Deal found 11/25$556
This United Airlines deal was found by Cheapflights users on 11/25. 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 12/2412:35 pmSEA - SOF
2 stops48h 10mUnited Airlines
Fri 1/166:05 amSOF - SEA
1 stop17h 15mUnited Airlines
Deal found 11/25$558
This United Airlines deal was found by Cheapflights users on 11/25. 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 12/2412:35 pmSEA - SOF
2 stops48h 10mUnited Airlines
Sun 1/186:10 amSOF - SEA
3 stops26h 33mUnited Airlines
Deal found 11/25$560
This United Airlines deal was found by Cheapflights users on 11/25. 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.
Thu 12/257:05 amSEA - SOF
2 stops29h 40mUnited Airlines
Sat 1/172:25 pmSOF - SEA
3 stops42h 18mUnited Airlines
Deal found 11/25$565
This United Airlines deal was found by Cheapflights users on 11/25. 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.
Thu 12/257:05 amSEA - SOF
2 stops29h 40mUnited Airlines
Wed 1/146:05 amSOF - SEA
3 stops43h 39mUnited Airlines
Deal found 11/25$569
This United Airlines deal was found by Cheapflights users on 11/25. 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 12/245:54 pmSEA - SOF
2 stops42h 51mUnited Airlines
Sat 1/172:25 pmSOF - SEA
3 stops42h 18mUnited Airlines
Deal found 11/25$571
This United Airlines deal was found by Cheapflights users on 11/25. 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.
Thu 12/257:05 amSEA - SOF
2 stops29h 40mUnited Airlines
Mon 1/196:10 amSOF - SEA
1 stop16h 00mUnited Airlines
Deal found 11/25$645

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 25, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$454
(Ticket)

One-way from

$383
(Mytrip)

Popular in

June

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
One-way flight from Seattle/Tacoma Intl to Bulgaria
Search Deals
Highest demand for flights based on searches. 18% potential increase in price ($180 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($24 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 25, 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

Thu 1/22

6:50 pm-11:15 am

1 stop30h 25m

Sofia

Mon 1/26

5:25 pm-11:30 am

1 stop28h 05m

$531

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Thu 1/22

8:40 am-10:45 pm

3 stops28h 05m

Sofia

Mon 1/26

6:10 am-12:10 pm

1 stop16h 00m

$533

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Thu 12/25

7:05 am-10:45 pm

2 stops29h 40m

Sofia

Fri 1/16

6:05 am-1:20 pm

1 stop17h 15m

$547

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Thu 12/25

7:05 am-10:45 pm

2 stops29h 40m

Sofia

Mon 1/19

6:10 am-10:43 pm

3 stops26h 33m

$554

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Thu 12/25

7:05 am-10:45 pm

2 stops29h 40m

Sofia

Wed 1/14

6:05 am-10:16 pm

2 stops26h 11m

$554

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Thu 12/25

7:05 am-10:45 pm

2 stops29h 40m

Sofia

Thu 1/15

6:00 am-10:43 pm

3 stops26h 43m

$554

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Thu 12/25

7:05 am-10:45 pm

2 stops29h 40m

Sofia

Sat 1/17

6:25 am-8:57 pm

2 stops24h 32m

$554

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Thu 12/25

7:05 am-10:45 pm

2 stops29h 40m

Sofia

Sun 1/18

6:10 am-10:43 pm

3 stops26h 33m

$555

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Wed 12/24

12:35 pm-10:45 pm

2 stops48h 10m

Sofia

Thu 1/15

6:00 am-12:10 pm

1 stop16h 10m

$556

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Wed 12/24

5:54 pm-10:45 pm

2 stops42h 51m

Sofia

Fri 1/16

6:10 am-8:57 pm

2 stops24h 47m

$560

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/24

Showing 1-10 of 27 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, 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 25, 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 25, 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
1,422 reviews

Entertainment

7.1

Overall

7.7

Crew

8.4

Boarding

7.8

Comfort

7.6

Food

7.2

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
1,422 reviews
KLM
7.7
Good
1,422 reviews

Entertainment

7.1

Overall

7.7

Crew

8.4

Boarding

7.8

Comfort

7.6

Food

7.2

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
1,497 reviews
KLM
7.7
Good
1,422 reviews

Entertainment

7.1

Overall

7.7

Crew

8.4

Boarding

7.8

Comfort

7.6

Food

7.2

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
9,046 reviews
KLM
7.7
Good
1,422 reviews

Entertainment

7.1

Overall

7.7

Crew

8.4

Boarding

7.8

Comfort

7.6

Food

7.2

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
4,059 reviews
KLM
7.7
Good
1,422 reviews

Entertainment

7.1

Overall

7.7

Crew

8.4

Boarding

7.8

Comfort

7.6

Food

7.2

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
7,594 reviews
KLM
7.7
Good
1,422 reviews

Entertainment

7.1

Overall

7.7

Crew

8.4

Boarding

7.8

Comfort

7.6

Food

7.2

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 28h 05m. British Airways provides one of the quickest options available for as low as $533. 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

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 Frankfurt flights
Seattle to Istanbul flights
Seattle to Leonardo da Vinci/Fiumicino flights
Seattle to Dublin flights
Seattle to Amsterdam flights
Seattle to Gatwick flights
Portland to Heathrow flights
Seattle to Orly flights
Seattle to Lisbon flights
Seattle to London City flights
Seattle to Barcelona-El Prat flights
Seattle to Stansted flights
Seattle to Athens flights
Seattle to Madrid flights
Portland to Amsterdam flights
Seattle to Sabiha Gokcen flights
Seattle to Munich flights
Portland to Gatwick flights
Seattle to Luton flights
Seattle to Zurich flights
Seattle to Oslo Gardermoen flights
Seattle to Narvik flights
Seattle to Vicenza flights
Seattle to Keflavik Intl flights
Portland to Charles de Gaulle flights
Seattle to Frederic Chopin flights
Seattle to Edinburgh flights
Portland to Dublin flights
Portland to Orly flights
Seattle to Bruxelles-National flights
Seattle to Prague flights
Seattle to Beauvais-Tille flights
Seattle to Vienna flights
Seattle to Copenhagen flights
Seattle to Malpensa flights
Portland to London City flights
Seattle to Arlanda flights
Portland to Lisbon flights
Portland to Leonardo da Vinci/Fiumicino flights
Portland to Barcelona-El Prat flights
Seattle to Linate flights
Portland to Madrid flights
Seattle to Berlin flights
Seattle to Geneva flights
Portland to Frankfurt flights
Portland to Athens flights
Seattle to Florence 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 November 25, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$538Average$883FlexibilityNo cancel feeOn-time75%
LufthansaCheapest$541Average$1,059FlexibilityNo cancel feeOn-time76%
Air FranceCheapest$555Average$718FlexibilityNo cancel feeOn-time77%
Turkish AirlinesCheapest$587Average$955FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$621Average$885FlexibilityNo 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.