SFO - SOF

$392 Find Cheap Flights from San Francisco to Sofia - Compare and Save

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 7/20. 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
$817
Typical prices: $604-$727
Austrian Airlines, Air Canada
Fri 10/30Fri 11/6
SFO - SOF • 2 stops
Cheapest one-way
$392
Typical prices: $368-$655
Multiple Airlines
Mon 7/20
SFO - SOF • 3 stops
Top airlines
Cheapest • from $821 (round-trip)
Best reviews • 7.5 score
Airline reviews
Airline reviews
+1
+1
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 travel
Cheapest • 19% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
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We hope you love your trip to Sofia!
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

Fri, Oct 30 - Fri, Nov 6
Multiple Airlines Logo
10:40 pm - 11:55 pm
SFO
-
SOF
16h 15m
2 stops
Multiple Airlines Logo
6:25 am - 4:06 pm
SOF
-
SFO
19h 41m
2 stops
$817Multiple Airlines
Tue, Aug 25 - Wed, Sep 16
Multiple Airlines Logo
11:10 am - 6:00 pm
SFO
-
SOF
20h 50m
2 stops
Multiple Airlines Logo
6:20 am - 12:40 pm
SOF
-
SFO
16h 20m
1 stop
$818Multiple Airlines
Tue, Sep 8 - Wed, Sep 23
Multiple Airlines Logo
9:05 pm - 11:15 pm
SFO
-
SOF
16h 10m
1 stop
Multiple Airlines Logo
11:05 am - 6:31 pm
SOF
-
SFO
17h 26m
2 stops
$819Multiple Airlines
Sat, Nov 21 - Sat, Dec 5
United Airlines Logo
11:59 pm - 6:20 pm
SFO
-
SOF
32h 21m
2 stops
United Airlines Logo
6:25 am - 9:28 pm
SOF
-
SFO
25h 03m
2 stops
$821United Airlines
Tue, Sep 8 - Fri, Sep 25
United Airlines Logo
1:55 pm - 6:40 pm
SFO
-
SOF
18h 45m
1 stop
United Airlines Logo
6:20 am - 11:05 pm
SOF
-
SFO
26h 45m
2 stops
$823United Airlines
Sun, Sep 6 - Thu, Sep 24
United Airlines Logo
9:05 pm - 11:15 pm
SFO
-
SOF
16h 10m
1 stop
United Airlines Logo
6:30 am - 3:20 pm
SOF
-
SFO
18h 50m
1 stop
$824United Airlines
Sat, Oct 24 - Sat, Nov 7
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
$825Lufthansa
Sat, Nov 28 - Sat, Dec 12
Multiple Airlines Logo
9:40 pm - 10:45 pm
SFO
-
SOF
15h 05m
1 stop
Multiple Airlines Logo
6:25 am - 9:28 pm
SOF
-
SFO
25h 03m
2 stops
$826Multiple Airlines
Tue, Aug 25 - Wed, Sep 16
Air Canada Logo
8:10 am - 6:40 pm
SFO
-
SOF
24h 30m
2 stops
Air Canada Logo
6:20 am - 7:49 pm
SOF
-
SFO
23h 29m
2 stops
$827Air Canada
Wed, Sep 9 - Tue, Sep 22
United Airlines Logo
2:10 pm - 6:40 pm
SFO
-
SOF
18h 30m
2 stops
United Airlines Logo
6:10 am - 3:21 pm
SOF
-
SFO
19h 11m
2 stops
$828United Airlines
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 October, where tickets cost $620 (return) on average. On the other hand, the most expensive months are July and December, where the average cost of round-trip tickets is $1,073 and $998 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 1 week before departure. For the absolute cheapest price, our data suggests you should book 23 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$392
Best time to beat the crowds with an average 12% drop in price.
Most popular time to fly with an average 22% 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 5 days, the lowest price for a flight from San Francisco to Sofia was $392 for a one-way ticket and $817 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 $706 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 1207 reviews
7.5Comfort
7.2Food
6.9Entertainment
7.5Boarding
8.2Crew
Airline reviews

Food seats were good Flight was delayed for over an hour, missed connecting flight, lot automatically rescheduled us to a new flight which was good but lost approximately 4 hours. Not a good way to start a vacation.

8.0 ExcellentAnonymous, Jun 2026
ORD - WAW
Read more LOT reviews

Food seats were good Flight was delayed for over an hour, missed connecting flight, lot automatically rescheduled us to a new flight which was good but lost approximately 4 hours. Not a good way to start a vacation.

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

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

During the flight, the fleas biting me in the plane.

The crew and flight were amazing . However , my bag’s locker got broken and no refund provided . Everything else was amazing except this bad incident that ruined my experience

The seats are small and the movie selection was disappointing. However, the food was excellent and the cabin crew was attentive and kind.

Plane is super outdated, seats not that comfortable for business class. Lounge also out dated. They need to catch up to 2024. Don’t think I’d ever fly again.

Aircraft was new. Food so so, especially vegetarian was very disappointing.

Boeng Dreamliner has so tiny seats, so even medium and smaller size people have not enough room to fill comfortable..

Entertainment system is okay, flight attendants were ok. Leg space very narrow, I couldn’t get what I wanted to eat, dinner nor breakfast.

Excellent experience with business class area. Staff was attentive and food was amazing. Only one bathroom for business class which was logistically difficult for the staff while preparing meals. Need to offer fluids with meals. I did not get enough water to drink. But overall I rate it 5 star.

As a big guy the seats are way too small for me. Would prefer more comfortable seats on these long haul flights.

The staff at IST airport could have been more helpful. Too much wasted time and the plane from IST to KHI was just horrible. The plane was not clean and smelled bad!

This is my 2nd time with the Turkish airline. Would definitely recommend. In stability we connected to Indiago would not recommend, very cramped seating. No inflight entertainment..service was inferior.

Vegan food tasted good. Restroom could be kept cleaner. Seat tray table was a bit tilted so food tray kept sliding down a bit. Flight crew can be a little more friendly, caring and approachable. Their faces lacked smiles and tone was stern.

Flight was delayed then we had to redirect for medical emergency during which time we had no information on what is the plan. The connecting flight was also delayed.

Awful seats, poor air circulation. Smelled like poop for 3-5 mins after someone used the bathroom. Child screaming for 13 hours

We are thankful for the useful gifts provided by the airline.The entertainment and crew were also very good

Quality of service on board was very inconsistent. FA service primarily seemed robotic and they barely engaged with passengers

No extra snacks were available. Meals quality is terrible. Crew was not friendly.

Lost one piece of luggage even though I checked in 2.5 hours before the flight

It was perfect! United Airlines staff was extremely caring, super friendly and professional

United has maintenance issues and can then never recover. No operations ability and simple issues always turn into multiple hours long cascading delays. Worst airline on earth.

I paid for a confirmed upgraded aisle seat and was moved to a center seat in the back of the plane at the last minute.

Horrifying Almost 2 million miles. Bring your own food and drink. One coffee or drink every three hours. Have to order meals on app more than 24 hours ahead Tiny and dirty bathrooms

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

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

Ridiculous boarding. Enter the gate, walk down a staircase with bags, exit a building, get on a crowded bus, dropped off a few meters away from the aircraft, walk with bags to another set of stairs to board the aircraft. And all that during a pouring down rain, and with children. Ridiculous!!!

Lufthansa no longer offers any refreshments and snacks on short i.e., around 2 hrs flight. We still had full staff stewards/stewardesses. No idea why they were needed as there was no work for them during the flight

Flight attendants were fine, seats a bit hard but I use a cushion for extra support. The only issue was it was a bit too cool and I needed to ask for and received and extra blanket. I survived!!!

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

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.

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.

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

The agent, who took my mother to her gate, kept talking with one of her male coworkers and treating my mother like a sack of potatoes. She was ignoring my questions because she was too busy flirting with her male colleague. This was a very unprofessional behavior. We also had to wait for close to half an hour for an agent to arrive.

Very good flight, only problem is the boarding process where some peoples do not have manners and do not how to fly ( preparing your documents, oversized carry-ons, not understanding or feigning to not understand directives).

I really like it and travel to Europe and back with Lufthansa, but it is getting expensive, a bit beyond my me

Not available crew to load the luggage for all the passengers,comon situation for local European destinations , not acceptable situation, never Lufthansa again 😉 🙄

Flight was overbooked. Crew did a great job but passengers weren’t nice and really not patient. Flying in these times is not the best idea tbh.

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

Information on your arrival and departure airports