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$351+ Cheap flights from San Francisco (SFO) to Sofia (SOF)

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 9/21. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — SOF
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheapflights Tip: The best prices from San Francisco to Sofia are usually found in January or October, booked 86 days in advance, depart on a Thursday or Sunday and return on a Saturday

Cheap flight deals from San Francisco to Sofia

Discover tips and strategies to find the most affordable flight options for your journey from San Francisco (SFO) to Sofia (SOF). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 11, 2025.

Round-trip from

$515
(Kiwi.com)

One-way from

$351
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$761
From San Francisco to Sofia
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One-way flight from San Francisco to Sofia
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Highest demand for flights based on searches. 29% potential increase in price ($351 potential increase over avg. RT price).
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Cheapest flight prices on average. 7% potential price decrease ($63 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from San Francisco to Sofia

Cheapest flights from San Francisco to Sofia
Explore the most affordable flight options available from San Francisco to Sofia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

This Kiwi.com deal was found by Cheapflights users on 9/10. 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 12/99:40 pmSFO - SOF
1 stop15h 05mLufthansa
Tue 12/236:00 amSOF - SFO
1 stop16h 40mLufthansa
Deal found 9/10$515
This Kiwi.com deal was found by Cheapflights users on 9/9. 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.
Mon 12/89:40 pmSFO - SOF
1 stop15h 05mMultiple Airlines
Mon 12/226:45 pmSOF - SFO
2 stops27h 55mMultiple Airlines
Deal found 9/9$522
This Gotogate deal was found by Cheapflights users on 9/9. 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.
Wed 10/298:30 amSFO - SOF
2 stops21h 45mMultiple Airlines
Wed 11/122:25 pmSOF - SFO
2 stops30h 29mMultiple Airlines
Deal found 9/9$533
This Kiwi.com deal was found by Cheapflights users on 9/9. 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 10/2910:40 pmSFO - SOF
1 stop15h 05mLufthansa
Wed 11/122:00 pmSOF - SFO
1 stop15h 35mLufthansa
Deal found 9/9$534
This Mytrip deal was found by Cheapflights users on 9/9. 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.
Mon 11/38:25 amSFO - SOF
2 stops18h 50mMultiple Airlines
Mon 11/173:00 pmSOF - SFO
1 stop35h 30mMultiple Airlines
Deal found 9/9$540
This CrystalTravel deal was found by Cheapflights users on 9/8. 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.
Wed 10/222:40 pmSFO - SOF
1 stop17h 10mLufthansa
Fri 11/76:10 amSOF - SFO
1 stop16h 30mLufthansa
Deal found 9/8$545
This FlightHub deal was found by Cheapflights users on 9/10. 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 12/97:25 pmSFO - SOF
1 stop33h 50mMultiple Airlines
Tue 12/236:00 amSOF - SFO
1 stop16h 40mMultiple Airlines
Deal found 9/10$546
This British Airways deal was found by Cheapflights users on 9/9. 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.
Mon 11/38:40 pmSFO - SOF
1 stop37h 30mBritish Airways
Mon 11/175:25 pmSOF - SFO
1 stop35h 20mBritish Airways
Deal found 9/9$548
This Priceline deal was found by Cheapflights users on 9/11. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/108:25 amSFO - SOF
2 stops23h 55mMultiple Airlines
Wed 12/246:10 amSOF - SFO
2 stops25h 12mMultiple Airlines
Deal found 9/11$551
This FlightHub deal was found by Cheapflights users on 9/11. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/102:50 pmSFO - SOF
2 stops17h 30mLufthansa
Wed 12/246:10 amSOF - SFO
1 stop16h 30mLufthansa
Deal found 9/11$553
This Expedia deal was found by Cheapflights users on 9/8. 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.
Wed 10/228:31 amSFO - SOF
2 stops18h 44mAir Canada
Fri 11/76:10 amSOF - SFO
2 stops25h 12mAir Canada
Deal found 9/8$554

Cheapflights Fare Finder

 
Customize your flight search to find flights from San Francisco to Sofia 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 11, 2025.
Use the filters below to find and compare flights from San Francisco to Sofia that are best for you.

Fly from

San Francisco

Fly to

Sofia

Route

Depart

Return

Price

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Wed 10/29

10:40 pm-10:45 pm

1 stop15h 05m

Sofia

Wed 11/12

2:00 pm-7:35 pm

1 stop15h 35m

$534

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Mon 11/3

8:40 pm-8:10 pm

1 stop37h 30m

Sofia

Mon 11/17

5:25 pm-6:45 pm

1 stop35h 20m

$548

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Tue 12/9

2:50 pm-6:20 pm

2 stops17h 30m

Sofia

Tue 12/23

6:00 am-12:40 pm

1 stop16h 40m

$550

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Wed 12/10

2:40 pm-10:45 pm

1 stop22h 05m

Sofia

Wed 12/24

6:10 am-12:40 pm

1 stop16h 30m

$550

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Sun 1/18

1:30 pm-6:20 pm

1 stop18h 50m

Sofia

Wed 4/15

1:50 pm-8:00 pm

1 stop16h 10m

$552

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Mon 1/12

1:30 pm-10:45 pm

1 stop23h 15m

Sofia

Thu 4/16

6:15 am-4:05 pm

1 stop19h 50m

$552

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Tue 1/13

9:40 pm-10:45 pm

1 stop15h 05m

Sofia

Wed 4/15

1:50 pm-8:00 pm

1 stop16h 10m

$552

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Wed 1/14

9:40 pm-10:45 pm

1 stop15h 05m

Sofia

Wed 4/15

1:50 pm-8:00 pm

1 stop16h 10m

$552

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Tue 3/10

2:30 pm-10:45 pm

1 stop23h 15m

Sofia

Tue 3/24

6:00 am-9:22 pm

2 stops24h 22m

$552

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

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/9

Showing 1-10 of 15 results
1
2

Best time to book a flight from San Francisco to Sofia

Have a flexible travel schedule? Discover the best time to fly to Sofia 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 Sofia

How far ahead should I book a flight from San Francisco to Sofia?

Use this chart to determine the optimal time to book a round-trip flight from San Francisco to Sofia. Price data was last updated on August 29, 2025.

To ensure you get the cheapest price possible for a flight from San Francisco to Sofia, you should look to book at least 86 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, November is the cheapest month in which you can book a flight from San Francisco to Sofia (average of $632). Flying from San Francisco to Sofia 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 SFO to SOF?

Find hourly flight availability from San Francisco to Sofia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 11, 2025.

A simple way to save on the total cost of your ticket is to fly from San Francisco to Sofia in the afternoon. If you’re flexible enough to do this you can expect to save up to 41% on your trip compared to booking a flight in the morning.

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

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

Travelers seeking maximum savings on their San Francisco to Sofia 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 Sofia

Get insights into the airlines that provide service to Sofia. 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 Sofia. Reviews last updated September 11, 2025.
Read through reviews of airlines operating flights from San Francisco to Sofia, such as United Airlines, Turkish Airlines, and Air Canada. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,937 reviews

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Food

6.6

Crew

8.1

Overall

7.4

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
8,937 reviews
United Airlines
7.4
Good
8,937 reviews

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Food

6.6

Crew

8.1

Overall

7.4

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
8,937 reviews

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Food

6.6

Crew

8.1

Overall

7.4

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
8,937 reviews

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Food

6.6

Crew

8.1

Overall

7.4

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
7,409 reviews
United Airlines
7.4
Good
8,937 reviews

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Food

6.6

Crew

8.1

Overall

7.4

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
8,937 reviews

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Food

6.6

Crew

8.1

Overall

7.4

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 Sofia. 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 San Francisco to Sofia?

    Airlines like Lufthansa, British Airways, and United Airlines fly from San Francisco to Sofia in about 15h 05m. The time it takes to get you to your destination can typically vary by up to 22h 25m. San Francisco and Sofia are separated by a distance of 6481 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from San Francisco to Sofia round-trip?

    Cheapflights users have booked flights from San Francisco to Sofia round-trip from $542. Other airlines that can offer you cheap pricing are United Airlines, from $627, and Lufthansa, from $639. Users have found that Turkish Airlines is 35% cheaper than the other options available to this destination.

  • Where are the most common layover locations when flying from San Francisco to Sofia?

    San Francisco to Sofia flights have a layover in Istanbul most often.

  • What are some popular things to do or see while on a layover in Istanbul?

    Istanbul travelers tend to visit Taksim Square, Beyazit Meydani, and Laleli Camii more than anywhere else. Taksim Square, Beyazit Meydani, and Laleli Camii can be visited by traveling about 20.8 mi, 21.7 mi, and 21.5 mi respectively from Istanbul. Those on a layover in Istanbul in need of a rental car can book one at Istanbul for about $44.

  • Where are the least popular layover locations for San Francisco to Sofia flights?

    Of the flights from San Francisco to Sofia that have layovers, the fewest flights stop in Munich.

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

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

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

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

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

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

    Currently, November is the cheapest month in which you can book a flight from San Francisco to Sofia (average of $632). Flying from San Francisco to Sofia 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

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Top 5 airlines flying from San Francisco to Sofia

Discover the top 5 airlines that operate flights from San Francisco to Sofia. 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 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapest$542Average$674FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$627Average$967FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$639Average$1,007FlexibilityNo cancel feeOn-time76%
ITA AirwaysCheapest$652Average$1,154FlexibilityNo cancel feeOn-time81%
Air CanadaCheapest$1,023Average$1,138FlexibilityNo cancel feeOn-time67%

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