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$336+ Cheap flights from Fremont, CA 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 1/16. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — SOF
ene. 14 — ene. 211
mié. 1/14
mié. 1/21
1 adult, Economy
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Cheap flight deals from Fremont to Bulgaria

Cheapest flights from Fremont to Bulgaria
Explore the most affordable flight options available from Fremont to Bulgaria. Find the lowest fares from popular airlines and budget airlines, with prices last updated on diciembre 15, 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.
sáb. 12/2712:50 pmSFO - VAR
2 stops40h 25mAustrian Airlines
jue. 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.
sáb. 12/272:40 pmSFO - VAR
1 stop16h 15mLufthansa
jue. 4/164:00 pmVAR - SFO
2 stops30h 40mLufthansa
Deal found 12/13$869
This Gotogate deal was found by Cheapflights users on 12/15. 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.
mar. 12/169:40 pmSFO - SOF
1 stop15h 05mLufthansa
dom. 12/282:00 pmSOF - SFO
1 stop15h 35mLufthansa
Deal found 12/15$1,233
This CrystalTravel deal was found by Cheapflights users on 12/15. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/169:40 pmSFO - SOF
2 stops28h 10mAustrian Airlines
dom. 12/286:45 pmSOF - SFO
2 stops27h 55mAustrian Airlines
Deal found 12/15$1,324
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.
sáb. 12/139:40 pmSFO - SOF
1 stop29h 20mMultiple Airlines
mié. 12/179:40 pmSOF - SFO
1 stop23h 25mMultiple Airlines
Deal found 12/13$1,458
This Travelocity deal was found by Cheapflights users on 12/15. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/171:50 pmSFO - SOF
2 stops61h 25mLufthansa
dom. 12/286:10 amSOF - SFO
1 stop24h 00mLufthansa
Deal found 12/15$1,812
This Travelocity deal was found by Cheapflights users on 12/15. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/171:50 pmSFO - SOF
2 stops61h 25mMultiple Airlines
dom. 12/2812:35 pmSOF - SFO
2 stops34h 05mMultiple Airlines
Deal found 12/15$1,840
This Expedia deal was found by Cheapflights users on 12/15. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/169:22 amSFO - SOF
3 stops42h 03mMultiple Airlines
dom. 12/286:45 pmSOF - SFO
2 stops34h 50mMultiple Airlines
Deal found 12/15$3,132

Find flight deals from Fremont to Bulgaria

Keep the following information in mind while searching for Fremont to Bulgaria flight deals. Data was last updated diciembre 15, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$585
(CrystalTravel)

One-way from

$336
(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 Fremont to Bulgaria
Search Deals
One-way flight from Fremont 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 Fremont 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 diciembre 15, 2025.
Use the filters below to find and compare flights from Fremont to Bulgaria that are best for you.

Fly from

Fremont

Fly to

Bulgaria

Route

Depart

Return

Price

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

mié. 4/8

9:05 pm-11:10 pm

1 stop16h 05m

Sofia

mié. 4/22

6:20 am-12:40 pm

1 stop16h 20m

$591

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

mar. 2/3

8:45 pm-10:45 pm

1 stop16h 00m

Sofia

lun. 2/9

6:10 am-3:55 pm

1 stop19h 45m

$608

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

sáb. 3/7

10:30 pm-4:20 pm

2 stops31h 50m

Sofia

dom. 3/15

2:30 pm-4:00 pm

1 stop34h 30m

$617

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

jue. 1/29

1:30 pm-10:45 pm

1 stop23h 15m

Sofia

lun. 2/2

6:10 am-8:10 pm

1 stop24h 00m

$618

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

jue. 1/29

2:40 pm-10:45 pm

1 stop22h 05m

Sofia

jue. 2/5

6:00 am-10:54 am

2 stops38h 54m

$618

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

mié. 4/8

9:05 pm-11:10 pm

1 stop16h 05m

Sofia

mié. 4/22

6:20 am-9:31 pm

2 stops25h 11m

$619

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

mar. 1/27

9:25 pm-10:45 pm

1 stop15h 20m

Sofia

mar. 2/3

6:00 am-12:40 pm

1 stop16h 40m

$619

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

sáb. 1/10

9:40 pm-10:45 pm

1 stop15h 05m

Sofia

lun. 1/26

6:10 am-12:40 pm

1 stop16h 30m

$619

San FranciscoVarna

SFO - VAR

SFOVAR

San Francisco

sáb. 12/27

12:50 pm-3:15 pm

2 stops40h 25m

Varna

jue. 4/16

4:00 pm-12:40 pm

2 stops30h 40m

$651

San FranciscoVarna

SFO - VAR

SFOVAR

San Francisco

mié. 3/18

7:50 pm-9:10 am

1 stop28h 20m

Varna

dom. 3/22

10:00 am-5:45 pm

1 stop16h 45m

$694

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/15

Showing 1-10 of 18 results
1
2

Best time to book a flight from Fremont to Bulgaria

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

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

Currently, August is the cheapest month in which you can book a flight from Fremont to Bulgaria (average of $439). Flying from Fremont 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 FR8 to BG?

Find hourly flight availability from Fremont 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 diciembre 15, 2025.

It’s typically best to fly out from Fremont to Bulgaria in the morning. Doing so could potentially save you 22% on the flight price compared to flying in the evening, which is usually more expensive.

What is the cheapest day to fly from Fremont to Bulgaria?

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

Travelers seeking maximum savings on their Fremont to Bulgaria flight should consider departing on Thursday mornings when fares are most often at their lowest. Friday at noon 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 diciembre 15, 2025.
Read reviews from past customers who have flown United Airlines, Turkish Airlines, and Lufthansa from Fremont 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.
United Airlines
7.4
Good
9,093 reviews

Food

6.6

Boarding

7.7

Crew

8.1

Comfort

7.3

Overall

7.4

Entertainment

7.1

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
9,093 reviews
United Airlines
7.4
Good
9,093 reviews

Food

6.6

Boarding

7.7

Crew

8.1

Comfort

7.3

Overall

7.4

Entertainment

7.1

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
4,100 reviews
United Airlines
7.4
Good
9,093 reviews

Food

6.6

Boarding

7.7

Crew

8.1

Comfort

7.3

Overall

7.4

Entertainment

7.1

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
7,631 reviews
United Airlines
7.4
Good
9,093 reviews

Food

6.6

Boarding

7.7

Crew

8.1

Comfort

7.3

Overall

7.4

Entertainment

7.1

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
1,107 reviews
United Airlines
7.4
Good
9,093 reviews

Food

6.6

Boarding

7.7

Crew

8.1

Comfort

7.3

Overall

7.4

Entertainment

7.1

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 Fremont to Bulgaria. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Fremont to Bulgaria?

    Airlines like Lufthansa, British Airways, and United Airlines fly from Fremont to Bulgaria in about 16h 05m. The time it takes to get you to your destination can typically vary by up to 15h 45m. The distance from Fremont to Bulgaria is about 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 Fremont 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 Fremont to Bulgaria for a low price.

  • What are the most popular routes from Fremont to Bulgaria?

    The most popular route from Fremont to Bulgaria is San Francisco - Sofia. You may also consider San Francisco - Varna or San Francisco - Bourgas.

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

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

  • How can I find direct flights from Fremont to Bulgaria?

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

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

    Yes. Cheapflights offers flight deals from Fremont 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 Fremont to Bulgaria?

    Currently, August is the cheapest month in which you can book a flight from Fremont to Bulgaria (average of $439). Flying from Fremont 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 Fremont to Bulgaria

Discover the top 4 airlines that operate flights from Fremont 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 diciembre 15, 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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