HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Bulgaria

$269+ 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 9/28. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — SOF
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Fremont 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 Fremont to Bulgaria

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

Round-trip from

$514
(Kiwi.com)

One-way from

$269
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$689
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 ($356 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 8% potential price decrease ($64 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
Search Deals

Find 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 September 15, 2025.

This Kiwi.com deal was found by Cheapflights users on 9/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/49:40 pmSFO - SOF
1 stop15h 05mLufthansa
Tue 11/186:00 amSOF - SFO
1 stop16h 40mLufthansa
Deal found 9/15$514
This Gotogate deal was found by Cheapflights users on 9/15. 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.
Sun 10/127:30 pmSFO - SOF
1 stop31h 00mMultiple Airlines
Fri 11/146:10 amSOF - SFO
2 stops25h 12mMultiple Airlines
Deal found 9/15$526
This Kiwi.com deal was found by Cheapflights users on 9/13. 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.
Wed 11/59:40 pmSFO - SOF
1 stop15h 05mLufthansa
Wed 11/196:10 amSOF - SFO
1 stop16h 30mLufthansa
Deal found 9/13$527
This Mytrip deal was found by Cheapflights users on 9/13. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/58:30 amSFO - SOF
2 stops20h 45mMultiple Airlines
Wed 11/196:10 amSOF - SFO
2 stops25h 24mMultiple Airlines
Deal found 9/13$529
This Cheapflightsfares deal was found by Cheapflights users on 9/15. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/129:05 pmSFO - SOF
1 stop15h 55mLufthansa
Fri 11/146:10 amSOF - SFO
1 stop16h 30mLufthansa
Deal found 9/15$546
This British Airways deal was found by Cheapflights users on 9/12. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/255:30 pmSFO - SOF
1 stop16h 40mBritish Airways
Wed 2/119:00 pmSOF - SFO
1 stop31h 45mBritish Airways
Deal found 9/12$548
This United Airlines deal was found by Cheapflights users on 9/12. 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.
Mon 11/249:40 pmSFO - SOF
1 stop15h 05mUnited Airlines
Thu 2/126:00 amSOF - SFO
2 stops25h 22mUnited Airlines
Deal found 9/12$551
This CrystalTravel deal was found by Cheapflights users on 9/12. 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.
Tue 11/259:40 pmSFO - SOF
1 stop15h 05mLufthansa
Fri 2/136:05 amSOF - SFO
1 stop22h 40mLufthansa
Deal found 9/12$553
This United Airlines deal was found by Cheapflights users on 9/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/42:45 pmSFO - SOF
2 stops17h 35mMultiple Airlines
Tue 11/182:15 pmSOF - SFO
1 stop15h 55mMultiple Airlines
Deal found 9/15$555
This Air Canada deal was found by Cheapflights users on 9/12. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/222:30 pmSFO - SOF
2 stops41h 50mAir Canada
Thu 2/126:00 amSOF - SFO
2 stops25h 22mAir Canada
Deal found 9/12$557
This FlightHub deal was found by Cheapflights users on 9/12. 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 11/257:25 pmSFO - SOF
1 stop33h 50mMultiple Airlines
Fri 2/136:05 amSOF - SFO
1 stop22h 40mMultiple Airlines
Deal found 9/12$558
This KAYAK deal was found by Cheapflights users on 9/14. 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.
Tue 9/168:26 amSFO - VAR
2 stops26h 19mLufthansa
Thu 10/169:20 amVAR - SFO
2 stops25h 35mLufthansa
Deal found 9/14$1,411

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 September 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

Tue 11/4

9:40 pm-10:45 pm

1 stop15h 05m

Sofia

Tue 11/18

6:00 am-12:40 pm

1 stop16h 40m

$514

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Tue 1/13

5:30 pm-8:10 pm

1 stop16h 40m

Sofia

Wed 4/15

9:30 pm-1:50 pm

1 stop26h 20m

$548

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Wed 11/26

9:40 pm-10:45 pm

1 stop15h 05m

Sofia

Thu 2/12

6:00 am-9:22 pm

2 stops25h 22m

$551

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Sun 11/23

1:30 pm-10:45 pm

1 stop23h 15m

Sofia

Thu 2/12

6:00 am-9:22 pm

2 stops25h 22m

$551

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Tue 1/13

8:31 am-6:20 pm

2 stops23h 49m

Sofia

Tue 1/27

6:00 am-9:22 pm

2 stops25h 22m

$552

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Mon 1/12

9:40 pm-10:45 pm

1 stop15h 05m

Sofia

Fri 1/23

6:10 am-9:22 pm

2 stops25h 12m

$552

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Sun 1/18

1:30 pm-6:20 pm

1 stop18h 50m

Sofia

Thu 4/16

6:15 am-4:05 pm

1 stop19h 50m

$552

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Wed 1/14

9:40 pm-10:45 pm

1 stop15h 05m

Sofia

Tue 4/14

6:15 am-12:40 pm

1 stop16h 25m

$553

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Sun 1/18

1:30 pm-6:20 pm

1 stop18h 50m

Sofia

Tue 4/14

6:15 am-12:40 pm

1 stop16h 25m

$553

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Tue 1/13

9:40 pm-10:45 pm

1 stop15h 05m

Sofia

Fri 4/17

6:15 am-12:40 pm

1 stop16h 25m

$553

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 22 results
1
2
3

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, November is the cheapest month in which you can book a flight from Fremont to Bulgaria (average of $632). Flying from Fremont to Bulgaria in June is currently the most expensive (average of $1,185). 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 September 15, 2025.

When flying from Fremont to Bulgaria, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 September 15, 2025.
Read reviews from past customers who have flown United Airlines, Turkish Airlines, and Air Canada 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
8,929 reviews

Crew

8.1

Entertainment

7.1

Overall

7.4

Boarding

7.7

Comfort

7.3

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
8,929 reviews
United Airlines
7.4
Good
8,929 reviews

Crew

8.1

Entertainment

7.1

Overall

7.4

Boarding

7.7

Comfort

7.3

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
3,968 reviews
United Airlines
7.4
Good
8,929 reviews

Crew

8.1

Entertainment

7.1

Overall

7.4

Boarding

7.7

Comfort

7.3

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??
Air Canada
7.1
Good
10,000 reviews
United Airlines
7.4
Good
8,929 reviews

Crew

8.1

Entertainment

7.1

Overall

7.4

Boarding

7.7

Comfort

7.3

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
7,407 reviews
United Airlines
7.4
Good
8,929 reviews

Crew

8.1

Entertainment

7.1

Overall

7.4

Boarding

7.7

Comfort

7.3

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
1,036 reviews
United Airlines
7.4
Good
8,929 reviews

Crew

8.1

Entertainment

7.1

Overall

7.4

Boarding

7.7

Comfort

7.3

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 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 15h 05m. The time it takes to get you to your destination can typically vary by up to 1h 35m. 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 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, November is the cheapest month in which you can book a flight from Fremont to Bulgaria (average of $632). Flying from Fremont to Bulgaria in June is currently the most expensive (average of $1,185). 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 Fremont to Bulgaria

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Heathrow flights
San Francisco to Heathrow flights
Los Angeles to Charles de Gaulle flights
San Francisco to Charles de Gaulle flights
Los Angeles to Leonardo da Vinci/Fiumicino flights
San Francisco to Leonardo da Vinci/Fiumicino flights
Los Angeles to London City flights
Los Angeles to Istanbul flights
Los Angeles to Frankfurt flights
Los Angeles to Barcelona-El Prat flights
San Francisco to Barcelona-El Prat flights
San Francisco to Istanbul flights
San Francisco to Lisbon flights
Los Angeles to Madrid flights
Los Angeles to Gatwick flights
Los Angeles to Orly flights
San Francisco to Gatwick flights
San Francisco to London City flights
San Francisco to Orly flights
San Diego to Heathrow flights
San Francisco to Madrid flights
Los Angeles to Dublin flights
San Francisco to Dublin flights
Los Angeles to Amsterdam flights
San Francisco to Frankfurt flights
San Francisco to Zurich flights
San Francisco to Amsterdam flights
Ontario to Heathrow flights
Ontario to Charles de Gaulle flights
Ontario to Leonardo da Vinci/Fiumicino flights
Los Angeles to Stansted flights
Los Angeles to Zurich flights
San Francisco to Munich flights
Santa Ana to Leonardo da Vinci/Fiumicino flights
Los Angeles to Lisbon flights
Los Angeles to Luton flights
Santa Ana to Heathrow flights
Los Angeles to Munich flights
Los Angeles to Malpensa flights
San Francisco to Malpensa flights
San Francisco to Athens flights
Los Angeles to Athens flights
San Francisco to Linate flights
Santa Ana to Charles de Gaulle flights
Burbank to Charles de Gaulle flights
Los Angeles to Sabiha Gokcen flights
Las Vegas to Heathrow flights
Los Angeles to Copenhagen flights
Los Angeles to Linate flights
Los Angeles to Frederic Chopin flights

Top 5 airlines flying from Fremont to Bulgaria

Discover the top 5 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 September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapest$542Average$1,199FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$627Average$973FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$628Average$1,012FlexibilityNo cancel feeOn-time76%
ITA AirwaysCheapest$652Average$1,154FlexibilityNo cancel feeOn-time81%
Air CanadaCheapest$1,023Average$1,138FlexibilityNo cancel feeOn-time67%

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.