SFO - SOF

$406 Find Cheap Flights from San Francisco to Sofia

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from San Francisco to Sofia departing on 8/10. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Sofia

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from San Francisco to Sofia, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from San Francisco to Sofia, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$733
Typical prices: $726-$604
Lufthansa
Tue 10/27Tue 11/10
SFO - SOF • 1 stop
Cheapest one-way
$406
Typical prices: $429-$545
Multiple Airlines
Mon 8/10
SFO - SOF • 2 stops
Top airlines
Cheapest • from $733 (round-trip)
Best reviews • 7.5 score
Airline reviews
Airline reviews
+1
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Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between San Francisco and Sofia. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $625 (round-trip)
Shortest trip • 15h 00m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 2 weeks in advance save around 21% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 19% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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Flight Deals
Booking Insights
Flight Deals

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

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from San Francisco to Sofia that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from San Francisco to Sofia

Tue, Oct 27 - Tue, Nov 10
Lufthansa Logo
10:40 pm - 10:45 pm
SFO
-
SOF
15h 05m
1 stop
Lufthansa Logo
6:25 am - 12:35 pm
SOF
-
SFO
16h 10m
1 stop
$733Lufthansa
Mon, Oct 26 - Mon, Nov 9
British Airways Logo
9:40 pm - 8:10 pm
SFO
-
SOF
37h 30m
1 stop
British Airways Logo
5:25 pm - 3:00 pm
SOF
-
SFO
31h 35m
1 stop
$741British Airways
Mon, Nov 23 - Mon, Dec 7
Lufthansa Logo
1:30 pm - 6:20 pm
SFO
-
SOF
18h 50m
1 stop
Lufthansa Logo
7:05 pm - 2:50 pm
SOF
-
SFO
29h 45m
1 stop
$745Lufthansa
Tue, Oct 27 - Tue, Nov 10
Air Canada Logo
10:35 am - 6:20 pm
SFO
-
SOF
22h 45m
2 stops
Air Canada Logo
6:25 am - 4:06 pm
SOF
-
SFO
19h 41m
2 stops
$747Air Canada
Wed, Aug 26 - Wed, Sep 9
Lufthansa Logo
2:00 pm - 6:40 pm
SFO
-
SOF
18h 40m
1 stop
Lufthansa Logo
6:20 am - 12:40 pm
SOF
-
SFO
16h 20m
1 stop
$748Lufthansa
Tue, Aug 25 - Tue, Sep 8
Multiple Airlines Logo
11:10 am - 6:40 pm
SFO
-
SOF
21h 30m
2 stops
Multiple Airlines Logo
6:10 am - 12:40 pm
SOF
-
SFO
16h 30m
1 stop
$751Multiple Airlines
Sun, Aug 23 - Thu, Sep 17
Multiple Airlines Logo
9:05 pm - 11:15 pm
SFO
-
SOF
16h 10m
1 stop
Multiple Airlines Logo
6:10 am - 9:20 pm
SOF
-
SFO
25h 10m
2 stops
$752Multiple Airlines
Tue, Sep 1 - Tue, Sep 22
Lufthansa Logo
9:05 pm - 11:15 pm
SFO
-
SOF
16h 10m
1 stop
Lufthansa Logo
6:10 am - 7:00 pm
SOF
-
SFO
22h 50m
1 stop
$753Lufthansa
Sun, Aug 23 - Thu, Sep 17
Lufthansa Logo
9:05 pm - 11:15 pm
SFO
-
SOF
16h 10m
1 stop
Lufthansa Logo
6:30 am - 12:40 pm
SOF
-
SFO
16h 10m
1 stop
$755Lufthansa
Tue, Sep 1 - Wed, Sep 23
Lufthansa Logo
2:00 pm - 11:15 pm
SFO
-
SOF
23h 15m
1 stop
Lufthansa Logo
12:55 pm - 7:00 pm
SOF
-
SFO
16h 05m
1 stop
$758Lufthansa
Booking Insights

KAYAK's insights & trends for San Francisco to Sofia flights

Get data-powered insights and trends into flights from San Francisco to Sofia to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from San Francisco to Sofia?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from San Francisco to Sofia departing in October.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from San Francisco to Sofia, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from San Francisco to Sofia is April, where tickets cost $611 (return) on average. On the other hand, the most expensive months are July and June, where the average cost of round-trip tickets is $1,056 and $1,055 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from San Francisco to Sofia, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from San Francisco to Sofia, you should book around 2 weeks before departure, which saves you about 21% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 23 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$406
Best time to beat the crowds with an average 13% drop in price.
Most popular time to fly with an average 39% increase in price.
Flight from San Francisco to Sofia

When to book flights from San Francisco to Sofia

Are your dates flexible? Find out the best times to travel from San Francisco to Sofia based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from San Francisco to Sofia

  • Are there opportunities to upgrade to first class on flights from San Francisco to Sofia?

    You can upgrade to first class on the San Francisco to Sofia route if you need a smooth journey. Upgrading is cheaper than originally booking first class. In general, your airline emails you about available first-class seats and requests you to upgrade. However, consider your travel budget before upgrading to avoid inconveniences. In addition, you need to upgrade at least 24 hours before take-off.

  • What are the popular layovers on the San Francisco to Sofia route?

    Most airlines from San Francisco to Sofia, including SWISS, Austrian Airlines, and British Airways, have one or more stopovers. The layover city and duration vary. Therefore, research the flight route before booking to choose the best journey. The major layover cities include Zurich, Amsterdam, Frankfurt, Munich, Copenhagen, Paris, London, Dublin, Rome, Istanbul, Barcelona, Lisbon, Tel Aviv, Doha, and Dubai.

  • Which airlines fly sustainably from San Francisco to Sofia?

    SWISS offers a sustainable journey by using sustainable aviation fuel (SAF). These airlines aim to make these fuels their long-term goal to reduce carbon emissions. Turkish Airlines ensure sustainability through its ground and operational practices. These airlines use sustainable aviation fuel to lower greenhouse gas emissions.

  • How can I travel from Sofia Airport to Downtown Sofia?

    The Line 20 tram offers a reliable journey from SOF airport to downtown. The trip takes approximately 56 minutes, depending on the traffic or local stops. If you have heavy luggage or need a quick trip to the city, consider taking a shuttle or taxi to get there in about 8 minutes. If you take Line 2 via the subway, you arrive in the city in around 16 minutes. Another option is a rental car to drive at your own pace.

  • What is the cheapest flight from San Francisco to Sofia?

    In the last 3 days, the lowest price for a flight from San Francisco to Sofia was $406 for a one-way ticket and $733 for a round-trip.

  • Do I need a passport to fly between San Francisco and Sofia?

    Yes

  • Which airports will I be using when flying from San Francisco to Sofia?

    San Francisco and Sofia are both served by 1 main airport. You will leave San Francisco from San Francisco and will be arriving at Sofia.

  • Which aircraft models fly most regularly from San Francisco to Sofia?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from San Francisco to Sofia?

    Star Alliance is the only airline alliance operating flights between San Francisco and Sofia.

  • What is the most popular layover when flying to Sofia from San Francisco?

    Istanbul is the most popular layover city among KAYAK users traveling from San Francisco to Sofia.

  • Which is the best airline for flights from San Francisco to Sofia, LOT or Turkish Airlines?

    The two airlines most popular with KAYAK users for flights from San Francisco to Sofia are LOT and Turkish Airlines. With an average price for the route of $1,336 and an overall rating of 7.5, LOT is the most popular choice. Turkish Airlines is also a great choice for the route, with an average price of $695 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from San Francisco to Sofia?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from San Francisco to Sofia.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from San Francisco to Sofia?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Sofia from San Francisco is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from San Francisco to Sofia?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Sofia with an airline and back to San Francisco with another airline. Booking your flights between San Francisco and SOF can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from San Francisco to Sofia?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Sofia from San Francisco up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from San Francisco to Sofia

  • San Francisco International Airport (SFO) is a hub for Alaska Airlines and United Airlines. It serves as a gateway to European, Asian, and American destinations. On the other hand, Sofia Airport (SOF) is a hub for Wizz Air, BH Air, and Bulgaria Air.
  • Low-cost airlines on the San Francisco to Sofia route, including Lufthansa, Austrian Airlines, and Turkish Airlines, allow passengers to save money on their trip. Most of these airlines charge competitive ticket prices, and you can choose a convenient journey.
  • SFO airport offers VIP services to notable persons such as the military. These services include quality airport transportation, meet and greet upon arrival, priority check-in, luggage assistance, access to the VIP lounge, and priority boarding.
  • Austrian Airlines offer special meals to passengers with religious, medical, or dietary needs on cheap flights from San Francisco to Sofia. These airlines offer a wide range of meals, including low-cholesterol, gluten-free, Muslim, and kosher. However, you have to order at least 24 hours before departure.
  • You can take the BART train from Downtown San Francisco to SFO airport, arriving in about 36 minutes. Another option is the Line 292 bus that gets you to the airport in approximately 1h 15min. If you're running late and need a quick journey, a taxi takes about 16 minutes.

Reviews of the top 4 airlines serving from San Francisco to Sofia

 
See real verified KAYAK customer reviews for airlines flying from San Francisco to Sofia. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from San Francisco to Sofia? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.5
LOTOverall score based on 1195 reviews
8.2Crew
6.9Entertainment
7.1Food
7.4Comfort
7.6Boarding
Airline reviews

Every time I fly LOT, I swear I will never do it again. And changing planes in Warsaw is a horror. Not even remotely organized. I can only feel sorry for the staff who have to put up with it.

6.0 GoodAnonymous, Apr 2026
OTP - WAW
Read more LOT reviews

Every time I fly LOT, I swear I will never do it again. And changing planes in Warsaw is a horror. Not even remotely organized. I can only feel sorry for the staff who have to put up with it.

My information was stolen, and someone used my card to purchase airline tickets. Everything has been submitted to my bank, and the police. Thank you!!

I have flown over 2million miles. Great flight but bizarre boarding process. They must have paged half the passengers to the desk for documentation check before boarding anyone. Overall great value.

Good in general, but i think the chair is not comfortable for traveling more than 2 hours ..

Krakow airport is very disorganized. nice seats. friendly crew. long legs had screens. short leg did not

Stuck on a plane for 6 hours due to a technical or mechanical issue.

Horrible communication, flight boarded then we sat on plane for almost 5 hours as the runway was barely covered in snow with no plows in sight and the as we tried to taxi there was a major equipment failure due to poor push off technique causing all passengers to be taken off the flight to ultimately have the flight cancelled. There was barely any communication to passengers as to what was happening or what to do next to get placed on another flight. Arriving to my final destination a whole day later having to take a connecting flight through Lisbon to ultimately end up in New York instead of a direct flight as none available for the next day. Never flying LOT airlines again!

Boarding was a madhouse. Airport staff was completely disinterested in communicating about the delays. Never again.

The seats are very narrow. Communication regarding bids for better seating could be better

Although I was flying in business class, the feeling, comfort and in general the whole experience was like flying in a low cost airline. Boarding by. Us, no priority to business class passengers. The plane was very old and looked poor and rely old. Seats do not recline. Space between rows very small. No separation between business class and economy. No separate toilet for business class passengers. Of course no entertainment, no WiFi and no charging. Very bad experience

On time, great food, good drink selection! Only down was alcohol-free lounge. Lufthansa had a much better offering!

Be honest of what you sell: This was sold as Business Class on all three legs, while the JetBlue plane didn't even have business class seats, and wanted $164 for extra legroom seats.

Seat assignments for family traveling with 2 children. Loud crowd during sleep time

It was crowded… the bathrooms dirty and smelly. The seats have been made even smaller.

delayed to take off from detroit by 3 hours lost baggage in istanbul and now in venice without baggage

Seats were very tight with poor legroom - and I am average height. During the 12 hour flight, tiny paper cups of drinks we're only offered during the super and breakfast services, with the crew nowhere to be seen in between. One of the bathrooms was out of order, leading to long lines waiting to use the remaining two available to the economy class passengers.

short flight but we still got a very nice lunch and the crew did an excellent job in taking care of us

For that price on Business class, I expected to have the pod seats. These were configured as 2/3/2 and my seat mate talked half the flight with a friend across the isle, loudly. Very uncouth.

The ground crew members at check in counter were courteous. The boarding was seamless. Flight departed as scheduled. Service on board was great

Very comfortable in business class. Excellent service. Good food. Smooth trip.

Easy of boarding, helpfully staff at check in, surprisingly comfortable seating

Lost of requested seat assignments. Lost my husband's meal choice

My service dog and I were asked to deplane just before they closed the door - clearly very last minute they couldn’t find the documentation that I have filled out many many times before that is for flying service animals. I purposely purchase 3seats (a whole row) since he is large and not all passengers want to sit next to a dog on a cross country flight. The plane departed with my husband on it!!! They made me fill out a hard copy of the same form and had to reschedule me on a later flight where they could find 3 seats together!! I’ve done this so many times before - clearly the error was on their part in a technology glitch - but really people - do better!! Very traumatic - and my husband had to wait for us when he landed ….so bad. Poor pup was confused and tired.

My flight time was changed without any notification to me which ruined my time sensitive plans so I ended up completely changing my travel plans and no reimbursement.

No screens or meal options. Freezing cold. Dirty seats. Left late.

I liked that my son and I were reseated next to each other (we had different bookings). I liked that it was a directg flight and mostly on time. I liked that you provided pillows and blankets. Flight attendants were generally courteous. The messaging through wifi did not work well. The food was not good. Seats are very narrow and I felt slightly claustraphobic in the window seat.

Some crew were unfriendly or in some cases just straight up rude.

Outstanding service, efficient & friendly crew, flight was safe, comfortable & on time

United Airline crews were very friendly and very attentive. 12 hours flight was gone like in a shorter one.

Flight itself excellent, but delayed so missed connection & got to destination 2 hrs later

Food choices limited & not enticing Seats quite uncomfortable & difficult to control

Definitely get premium economy on a flight this long if you can. Your legs and while body will thank you.

Boarding was disorganized. The door to one to the toilets wouldn’t lock. The plane was shockingly cramped, and clearly used for domestic flights due to the menus for items to sell domestic travelers. United should be ashamed of its small seats, tiny unclean toilets, and money grubbing stance toward services, compared to Lufthansa, Emirates, and most international carriers United is awful.

Terrible. Lost our luggage for 4 days. Did not advise passengers there was a strike in Barcelona Airport and had zero personnel on hand at airport to advise passengers on where to go to file claims. We had to fend for ourselves. No assistance at all other than an online claims submission process that we had to find out about on our own.

Lufthansa cancelled our flight from Los Angeles to Naples Italy on March 10 for scheduled flight on March 12 Very stressful experience trying to arrange alternatives. Will never fly again with Lufthansa

Service and food were excellent. Incredibly friendly and competent staff. Flight was delayed over and hour and I had to run between terminals to get my connecting flight.

Late flight Delays Poor service Poor staff Worst airline ever

Lufthansa still has a good level of quality compared to US airlines, especially with respect to (1) food quality - actually tasty, (2) good French red wine - free, (3) good movie selection. Also my ticket price includes 1 free check-in luggage, while some other budget airlines sneak in an extra $150 for a checkin.

The food could be better, more snacks. And have some plugs to chargue the phone.

Everything was really great just The aircraft was too old and sounded it will break during takeoff

Everything you need to know for your flight from San Francisco to Sofia

Information on your arrival and departure airports