$439 Cheap Flights from San Francisco (SFO) to Sofia (SOF)

View $439 flight on Sat, May 2, 2026Opens in a new window

Popular airlines from San Francisco Intl. Airport (SFO) to Sofia Airport (SOF)

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Cheap Flights from San Francisco to Sofia (SFO-SOF)

Prices were available within the past 7 days and start at $439 for one-way flights and $599 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Swiss International Air Lines
Tue, Oct 14 - Tue, Dec 2
SFO
San Francisco
SOF
Sofia
$599 Roundtrip, just found
$599
Roundtrip
just found
Select Swiss International Air Lines flight, departing Tue, Oct 14 from San Francisco to Sofia, returning Tue, Dec 2, priced at $599 just found
Lufthansa
Tue, Oct 14 - Tue, Dec 2
SFO
San Francisco
SOF
Sofia
$601 Roundtrip, just found
$601
Roundtrip
just found
Select Lufthansa flight, departing Tue, Oct 14 from San Francisco to Sofia, returning Tue, Dec 2, priced at $601 just found
United
Tue, Oct 28 - Tue, Nov 11
SFO
San Francisco
SOF
Sofia
$601 Roundtrip, found 12 hours ago
$601
Roundtrip
found 12 hours ago
Select United flight, departing Tue, Oct 28 from San Francisco to Sofia, returning Tue, Nov 11, priced at $601 found 12 hours ago
Air Canada
Tue, Oct 28 - Tue, Nov 11
SFO
San Francisco
SOF
Sofia
$601 Roundtrip, found 12 hours ago
$601
Roundtrip
found 12 hours ago
Select Air Canada flight, departing Tue, Oct 28 from San Francisco to Sofia, returning Tue, Nov 11, priced at $601 found 12 hours ago
Air Canada
Wed, Nov 5 - Wed, Nov 19
SFO
San Francisco
SOF
Sofia
$601 Roundtrip, found 2 days ago
$601
Roundtrip
found 2 days ago
Select Air Canada flight, departing Wed, Nov 5 from San Francisco to Sofia, returning Wed, Nov 19, priced at $601 found 2 days ago
Air Canada
Mon, Dec 29 - Wed, Jan 21
SFO
San Francisco
SOF
Sofia
$602 Roundtrip, found 1 day ago
$602
Roundtrip
found 1 day ago
Select Air Canada flight, departing Mon, Dec 29 from San Francisco to Sofia, returning Wed, Jan 21, priced at $602 found 1 day ago
Lufthansa
Tue, Jan 6 - Tue, Jan 20
SFO
San Francisco
SOF
Sofia
$603 Roundtrip, found 4 hours ago
$603
Roundtrip
found 4 hours ago
Select Lufthansa flight, departing Tue, Jan 6 from San Francisco to Sofia, returning Tue, Jan 20, priced at $603 found 4 hours ago
Swiss International Air Lines
Tue, May 5 - Wed, May 13
SFO
San Francisco
SOF
Sofia
$606 Roundtrip, found 5 hours ago
$606
Roundtrip
found 5 hours ago
Select Swiss International Air Lines flight, departing Tue, May 5 from San Francisco to Sofia, returning Wed, May 13, priced at $606 found 5 hours ago
ITA Airways
Mon, Aug 4 - Wed, Aug 20
SFO
San Francisco
SOF
Sofia
$611 Roundtrip, found 16 hours ago
$611
Roundtrip
found 16 hours ago
Select ITA Airways flight, departing Mon, Aug 4 from San Francisco to Sofia, returning Wed, Aug 20, priced at $611 found 16 hours ago
British Airways
Mon, Dec 1 - Mon, Dec 15
SFO
San Francisco
SOF
Sofia
$615 Roundtrip, found 6 days ago
$615
Roundtrip
found 6 days ago
Select British Airways flight, departing Mon, Dec 1 from San Francisco to Sofia, returning Mon, Dec 15, priced at $615 found 6 days ago

Find the cheapest month to fly from San Francisco (SFO) to Sofia (SOF)

January is typically the cheapest month to fly

From $547 - $1,871 per traveler.

Graph displaying average flight prices per month

Alternative airports near Sofia

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Sofia Airport SOF. Cheapest and Closest option available. Average driving time to city center is 11 minutes. Flights from $1,251
SOF
Sofia Airport
CheapestClosest
Average driving time to city center11 min
Flights from $1,251
Flights from San Francisco (SFO) to Sofia (SOF)
Origin airport
San Francisco Intl.
Destination airport
Sofia
Airlines serving
Air Canada, Air France, American Airlines, Austrian Airlines, British Airways, Emirates, ITA Airways, Iberia, JetBlue Airways, KLM, LOT-Polish Airlines, Lufthansa, Swiss International Air Lines, Turkish Airlines, United
Roundtrip price
$598
Distance
6486 mi

San Francisco to Sofia Flights

The cheapest times to fly from San Francisco to Sofia

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from San Francisco to Sofia are during the month of October. You can find some of the cheapest flights from San Francisco to Sofia with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from San Francisco to Sofia

Sunday is one of the best days to book for cheap flights from San Francisco to Sofia: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from San Francisco to Sofia

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from San Francisco to Sofia in 2025. You can also book with separate airlines for your outbound and return journeys, from $439 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap San Francisco to Sofia flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your San Francisco to Sofia airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from San Francisco Intl. Airport (SFO) to Sofia Airport (SOF) cost?
Discover the latest flight deals from SFO to SOF by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from SFO to SOF?
The cheapest flights from SFO to SOF are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from SFO to SOF?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from SFO to SOF. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from San Francisco Intl. Airport (SFO) to Sofia Airport (SOF)?
Direct flights from San Francisco Intl. Airport (SFO) to Sofia Airport (SOF) aren't available daily, so you'll need to take a flight with a layover. Explore your options with our filter tool. Enter your travel dates and select either "1 Stop" or "2+ Stops."
What day of the week has the most flights from SFO to SOF?
Typically you'll find the most flight options available on a Friday. Tuesdays are often the quietest.* However, this can change based on the time of year, carrier and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from San Francisco Intl. Airport (SFO) to Sofia Airport (SOF)?
To land at Sofia Airport (SOF) on time, select a flight that leaves San Francisco Intl. Airport (SFO) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this hour.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from San Francisco Intl. Airport (SFO) to Sofia Airport (SOF) last-minute?
Booking your ticket from SFO to SOF shortly before your journey is usually more expensive. However, if there's some wiggle room with your departure times and dates, you could land a cheap last-minute fare.
Is it cheaper to book a SFO to SOF flight and hotel package?
Securing a SFO to SOF flight and hotel package is typically cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your trip all in one place. Pick from our impressive range of accommodations and then add flights, car rentals and activities to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from San Francisco Intl. Airport (SFO) to Sofia Airport (SOF)?
You can usually reschedule or cancel your SFO to SOF flight. However, for bookings made more than 24 hours ago, additional charges may apply. Check your airline's policies in your itinerary to see what changes are allowed and whether any costs are involved. You'll also find further details on our Customer Service portal.

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*Available to One Key members.