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$349+ Cheap flights from San Francisco (SFO) 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 1/7. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — SOF
Jan 13 — Jan 201
Tue 1/13
Tue 1/20
1 adult, Economy
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Cheap flight deals from San Francisco to Bulgaria

Cheapest flights from San Francisco to Bulgaria
Explore the most affordable flight options available from San Francisco to Bulgaria. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 14, 2025.

This FlightHub deal was found by Cheapflights users on 12/13. 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 12/2712:50 pmSFO - VAR
2 stops40h 25mAustrian Airlines
Thu 4/164:00 pmVAR - SFO
2 stops30h 40mAustrian Airlines
Deal found 12/13$651
This Gurufare deal was found by Cheapflights users on 12/13. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/272:40 pmSFO - VAR
1 stop16h 15mLufthansa
Thu 4/164:00 pmVAR - SFO
2 stops30h 40mLufthansa
Deal found 12/13$869
This United Airlines deal was found by Cheapflights users on 12/11. 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 12/1711:00 amSFO - SOF
2 stops25h 45mUnited Airlines
Thu 2/56:00 amSOF - SFO
1 stop19h 55mUnited Airlines
Deal found 12/11$1,327
This Kiwi.com deal was found by Cheapflights users on 12/13. 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.
Sat 12/139:40 pmSFO - SOF
1 stop29h 20mMultiple Airlines
Wed 12/179:40 pmSOF - SFO
1 stop23h 25mMultiple Airlines
Deal found 12/13$1,458
This oojo deal was found by Cheapflights users on 12/11. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/176:50 pmSFO - SOF
1 stop27h 55mTurkish Airlines
Thu 2/59:35 amSOF - SFO
1 stop17h 10mTurkish Airlines
Deal found 12/11$1,806

Find flight deals from San Francisco to Bulgaria

Keep the following information in mind while searching for San Francisco to Bulgaria flight deals. Data was last updated December 14, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$574
(Kiwi.com)

One-way from

$349
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$1,146
Provider with most accurate pricing for San Francisco-Sofia flight deals.
Search Deals
Provider most trusted by Cheapflights users for San Francisco-Sofia flights.
Search Deals
From San Francisco to Bulgaria
Search Deals
One-way flight from San Francisco to Bulgaria
Search Deals
Highest demand for flights based on searches. 29% potential increase in price ($349 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease ($62 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 San Francisco 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 14, 2025.
Use the filters below to find and compare flights from San Francisco to Bulgaria that are best for you.

Fly from

San Francisco

Fly to

Bulgaria

Route

Depart

Return

Price

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Thu 2/5

9:25 pm-10:45 pm

1 stop15h 20m

Sofia

Thu 2/19

6:05 am-12:40 pm

2 stops16h 35m

$582

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Sun 3/1

1:10 pm-8:50 pm

1 stop21h 40m

Sofia

Mon 3/9

9:35 am-5:45 pm

1 stop17h 10m

$587

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Wed 4/8

9:05 pm-11:10 pm

1 stop16h 05m

Sofia

Wed 4/22

6:20 am-12:40 pm

1 stop16h 20m

$591

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Sun 3/1

6:00 am-4:20 pm

2 stops24h 20m

Sofia

Mon 3/9

5:25 pm-4:00 pm

1 stop31h 35m

$616

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Sat 3/7

10:30 pm-4:20 pm

2 stops31h 50m

Sofia

Sun 3/15

2:30 pm-4:00 pm

1 stop34h 30m

$617

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Thu 1/29

1:30 pm-10:45 pm

1 stop23h 15m

Sofia

Mon 2/2

6:10 am-12:40 pm

1 stop16h 30m

$618

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Wed 4/8

9:05 pm-11:10 pm

1 stop16h 05m

Sofia

Wed 4/22

6:20 am-9:31 pm

2 stops25h 11m

$619

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Tue 1/27

9:25 pm-10:45 pm

1 stop15h 20m

Sofia

Tue 2/3

6:00 am-12:40 pm

1 stop16h 40m

$619

San FranciscoVarna

SFO - VAR

SFOVAR

San Francisco

Sat 12/27

12:50 pm-3:15 pm

2 stops40h 25m

Varna

Thu 4/16

4:00 pm-12:40 pm

2 stops30h 40m

$651

San FranciscoVarna

SFO - VAR

SFOVAR

San Francisco

Wed 3/18

7:50 pm-9:10 am

1 stop28h 20m

Varna

Sun 3/22

10:00 am-5:45 pm

1 stop16h 45m

$694

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/12

Showing 1-10 of 17 results
1
2

Best time to book a flight from San Francisco to Bulgaria

Have a flexible travel schedule? Discover the best time to fly to Bulgaria from San Francisco 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 San Francisco to Bulgaria

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

Currently, August is the cheapest month in which you can book a flight from San Francisco to Bulgaria (average of $439). Flying from San Francisco to Bulgaria in June is currently the most expensive (average of $823). 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 SFO to BG?

Find hourly flight availability from San Francisco 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 December 14, 2025.

One of the essential ways to save on airfare from San Francisco to Bulgaria is to remain as flexible as possible. Flights that are in the evening tend to be the most expensive. A flight at noon could potentially save you up to 22% on airfare.

What is the cheapest day to fly from San Francisco to Bulgaria?

Use this chart to determine the cheapest time to fly round-trip from San Francisco to Bulgaria. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their San Francisco to Bulgaria flight should consider departing on Thursday mornings when fares are most often at their lowest. Saturday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

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 14, 2025.
Get a feel of what it's like to fly with United Airlines, Turkish Airlines, and Lufthansa from San Francisco to Bulgaria by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,094 reviews

Boarding

7.7

Overall

7.4

Comfort

7.3

Crew

8.1

Entertainment

7.1

Food

6.6

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
9,094 reviews
United Airlines
7.4
Good
9,094 reviews

Boarding

7.7

Overall

7.4

Comfort

7.3

Crew

8.1

Entertainment

7.1

Food

6.6

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Turkish Airlines
7.3
Good
4,094 reviews
United Airlines
7.4
Good
9,094 reviews

Boarding

7.7

Overall

7.4

Comfort

7.3

Crew

8.1

Entertainment

7.1

Food

6.6

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Lufthansa
6.8
Okay
7,626 reviews
United Airlines
7.4
Good
9,094 reviews

Boarding

7.7

Overall

7.4

Comfort

7.3

Crew

8.1

Entertainment

7.1

Food

6.6

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
ITA Airways
6.7
Okay
1,106 reviews
United Airlines
7.4
Good
9,094 reviews

Boarding

7.7

Overall

7.4

Comfort

7.3

Crew

8.1

Entertainment

7.1

Food

6.6

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

Related info for your journey

Find useful and relevant information for your journey from San Francisco 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 San Francisco to Bulgaria?

    San Francisco (SFO), located 11.8 mi from the city center, is the airport you fly out of when you book flights from San Francisco to Bulgaria.

  • How long is the flight from San Francisco to Bulgaria?

    Departing from San Francisco to Bulgaria will take you 15h 20m. San Francisco and Bulgaria are separated by a distance of 6481 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines to fly from San Francisco to Bulgaria one-way?

    The cheapest airline one-way is Lufthansa, with whom users have recently found tickets for as low as $339. However, be on the lookout for offers from KLM and United Airlines, as they are both options that can get you from San Francisco to Bulgaria for a low price.

  • What are the most popular routes from San Francisco to Bulgaria?

    The most popular flight routes from San Francisco to Bulgaria are San Francisco - Sofia, San Francisco - Varna and San Francisco - Bourgas.

  • Can I find deals for flights from San Francisco to Bulgaria that include hotel bookings?

    Yes. In addition to deals on San Francisco to Bulgaria flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from San Francisco to Bulgaria?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Francisco to Bulgaria.

  • Can I find deals for business class flights from San Francisco to Bulgaria?

    Yes. Cheapflights offers flight deals from San Francisco 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 San Francisco to Bulgaria?

    Currently, August is the cheapest month in which you can book a flight from San Francisco to Bulgaria (average of $439). Flying from San Francisco to Bulgaria in June is currently the most expensive (average of $823). 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 4 airlines flying from San Francisco to Bulgaria

Discover the top 4 airlines that operate flights from San Francisco 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 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapest$542Average$1,187FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$565Average$896FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$616Average$942FlexibilityNo cancel feeOn-time69%
ITA AirwaysCheapest$652Average$1,154FlexibilityNo cancel feeOn-time81%

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