SFO - SOF

$259 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 11/10. 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

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
$481
Typical prices: $639-$843
Lufthansa
Wed 11/12Wed 11/26
SFO - SOF • 1 stop
Cheapest one-way
$259
Typical prices: $481-$561
Multiple Airlines
Mon 11/10
SFO - SOF • 2 stops
Top airlines
Lufthansa
Cheapest • from $481 (round-trip)
United Airlines
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
January
Cheapest • 26% price drop
August
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

Wed, Nov 12 - Wed, Nov 26
Lufthansa Logo
9:40 pm - 10:45 pmSFO-SOF
15h 05m1 stop
Lufthansa Logo
6:10 am - 12:40 pmSOF-SFO
16h 30m1 stop
$481Lufthansa
Find Deal
Thu, Dec 4 - Thu, Dec 11
Lufthansa Logo
9:40 pm - 10:45 pmSFO-SOF
15h 05m1 stop
Lufthansa Logo
6:00 am - 12:40 pmSOF-SFO
16h 40m1 stop
$482Lufthansa
Find Deal
Thu, Nov 13 - Thu, Nov 27
Multiple Airlines Logo
9:40 pm - 10:45 pmSFO-SOF
15h 05m1 stop
Multiple Airlines Logo
6:00 am - 9:22 pmSOF-SFO
25h 22m2 stops
$499Multiple Airlines
Find Deal
Tue, Jan 13 - Tue, Jan 27
Multiple Airlines Logo
9:40 pm - 10:45 pmSFO-SOF
15h 05m1 stop
Multiple Airlines Logo
6:00 am - 10:54 amSOF-SFO
38h 54m2 stops
$500Multiple Airlines
Find Deal
Sat, Jan 17 - Mon, Feb 16
SWISS Logo
7:25 pm - 2:15 pmSFO-SOF
32h 50m1 stop
SWISS Logo
3:00 pm - 4:30 pmSOF-SFO
35h 30m1 stop
$514SWISS
Find Deal
Wed, Nov 12 - Wed, Nov 26
United Airlines Logo
1:30 pm - 10:45 pmSFO-SOF
23h 15m1 stop
United Airlines Logo
6:10 am - 9:22 pmSOF-SFO
25h 12m2 stops
$527United Airlines
Find Deal
Fri, Jan 16 - Wed, Feb 18
United Airlines Logo
1:30 pm - 6:20 pmSFO-SOF
18h 50m1 stop
United Airlines Logo
6:10 am - 3:55 pmSOF-SFO
19h 45m1 stop
$529United Airlines
Find Deal
Mon, Jan 19 - Wed, Feb 18
Air Canada Logo
7:30 am - 1:25 pmSFO-SOF
19h 55m2 stops
Air Canada Logo
6:10 am - 9:39 pmSOF-SFO
25h 29m2 stops
$548Air Canada
Find Deal
Thu, Nov 13 - Mon, Nov 17
Air Canada Logo
8:30 am - 1:50 pmSFO-SOF
19h 20m2 stops
Air Canada Logo
2:20 pm - 1:30 pmSOF-SFO
33h 10m2 stops
$553Air Canada
Find Deal
Thu, Mar 12 - Thu, Mar 26
SWISS Logo
8:25 pm - 1:15 pmSFO-SOF
31h 50m2 stops
SWISS Logo
4:00 pm - 5:30 pmSOF-SFO
34h 30m1 stop
$578SWISS
Find Deal
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 November.

What’s the cheapest day of the week to fly from San Francisco to Sofia?

The average price of all round-trip flights from San Francisco to Sofia clicked on KAYAK for each day over the last 12 months.

If you are looking for a flight deal from San Francisco to Sofia, look for departures on Thursdays and avoid leaving on a Friday, as it's usually the priciest day. When flying back from Sofia, Saturday is the cheapest day to fly and Sunday is the most expensive.

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 January, where tickets cost $613 (return) on average. On the other hand, the most expensive months are June and December, where the average cost of round-trip tickets is $1,536 and $1,098 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 14 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$259
Best time to beat the crowds with an average 27% drop in price.
Most popular time to fly and prices are also 17% lower on average.
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 $259 for a one-way ticket and $481 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, United Airlines or Turkish Airlines?

    The two airlines most popular with KAYAK users for flights from San Francisco to Sofia are United Airlines and Turkish Airlines. With an average price for the route of $945 and an overall rating of 7.4, United Airlines is the most popular choice. Turkish Airlines is also a great choice for the route, with an average price of $679 and an overall rating of 7.3.

  • 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 5 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.
7.4
United AirlinesOverall score based on 8973 reviews
7.3Comfort
6.6Food
7.1Entertainment
8.1Crew
7.7Boarding
Airline reviews

We were in business class. the angled seats in that class do not have a real window view & the placement of the controls are bad. But we knew that. But the food options were mediocre. The taste was fine, but the size was for a child. It’s just really feels like United is skimping on everything. Even when we were in the Polaris lounge they did not have diet sodas. They said they were out no Coke zero no Diet Coke, etc. I do not think the portion of nuts they serve on the plane could get any smaller. Really a minimal service and offer for what you’re paying for in business.

6.0 GoodSandra, Oct 2025SFO - MUC
Read more United Airlines reviews

We were in business class. the angled seats in that class do not have a real window view & the placement of the controls are bad. But we knew that. But the food options were mediocre. The taste was fine, but the size was for a child. It’s just really feels like United is skimping on everything. Even when we were in the Polaris lounge they did not have diet sodas. They said they were out no Coke zero no Diet Coke, etc. I do not think the portion of nuts they serve on the plane could get any smaller. Really a minimal service and offer for what you’re paying for in business.

We had to deboard 2 times due to maintenance issues. They changed the plane, and then we got deviated to LAX due to maibtenance issues on the other plane, had to sleep at LAX and los a full day.

From the first moment you interact with United Airlines, you can expect nothing less but extreme frustration. The baggage handler at the bag drop seems completely unbothered by the presence of customers waiting in line. No help was extended to load the baggage whatsoever. And if any of your bags is overweight by 0.01 pound they will make you re-distribute everything in your suitcase just to play power trip. When it was time to board no help was extended to customers to locate their seats. Moreover. It was a chaotic mess at the gate when it was unclear who should board first and everyone just bunched up, trying to get on the plane. I am sure the crew was doing their best to perform their jobs while being paid their wages however it shouldn’t be that hard to smile once or twice when you’re in the business if serving customers. It is a shame for the United States of America to have a flagship carrier of such low caliber. Our flight was also delayed by about an hour and a half due to further delays prior to our inbound flight. Being someone who has travelled for both business and leisure in Asia, Europe, and South America I have never experienced such poor quality of service.

The pilots were late and it made us 1 hour late. The meat was tough and bok choy was also tough.

Stuck on tarmac for two hours plus a 5.5 hour flight. Rude flight attendant. And no meals, not even for purchase!

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!!!

I learned that seating towards the end of plane that a line forms for the restroom and people use your chair as a hand railing, bumping your seat consistently. I was seated in the aisle. I think that next time if I am towards the back row I would want to sit in the middle or window seat.

The best airline I have ever travel , really good customer service, attention and service !!

Everything was great. Only thing that could’ve made it better was buy on board options for hot food, but the snacks were decent. The flight attendants were great. I had no complaints. I was able to make it to my destination safely

Horrific. They missed my connecting flight to San Diego. I didn’t get there until Monday at 9am when I had a mandatory court settlement conference scheduled at 6am since we had parties on the east coast. This caused many issues. All because United apparently forgot to hold the doors open until my flight landed that only had a 10 minute delay. This was the last flight to Southern California. So I couldn’t even rent a car to finish the trip. United cannot be trusted when traveling on specific days and times since weather didn’t have anything to do with the delays.

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.

I wouldn't know what the flight was like. AI canceled my flight reservation!! There's no way to speak to an actual human to fix the issue! NEVER AGAIN! ALWAYS BOOK YOUR FLIGHT DIRECTLY WITH THE AIRLINE NEVER GO THROUGH KAYAK OR JUSTFLY.COM!!

Paying extra for premium seats was wasted. Turkish Airlines takes 2 seats for bassinet. The lady next to me had a baby with bassinet Bassinet was in front of my seat

Rude staff. I would avoid using the word racist but definitely partially or discriminatory. My 72 yrs old mother who is also disabled was traveling on this flight. She was the second passenger boarded to the plane. The First elderly couple ahead of my mother were allowed to use the airplane bathroom but my mother was denied entry stating it was for safety reasons. My mother objected the the couple in front of her were allowed but hostess still stated that due to the flight safety reasons she can’t use it. Even my mother explained that he is using blood pressure medication that’s why she have to use the restroom frequently but the crew continued arguing her. At one point the Mae attendent even suggested that if that’s the case my mother can urinate in her seat. The level of disrespect against an elderly lady is beyond my comprehension. This matter will be taken to the social media to shame the employees involved.

my experience was great with Turkish airlines . the problem i encountered was with kayak booking. When I booked . it showed that im allowed a bag . and when I got to the airport, i had to pay $165 for one bag.

Not up to Business Class standards. Two of the three toilets were out of order. The hostesses were aware and didn’t show any responsible act to do something. Food quality was not what we expect from Turkish hospitality. Overall we were not impressed and disappointed.

During mid flight, try to get a flight attendant to help I couldn’t find one Otherwise, everything was perfect

I was not given basinett seat.The connecting flight was missed due to airline fault i was not accomodated for hotel.Drinks were normt served frewuently.Never travelling again on tirkish airlines.I always travel wiyh family by turkish airline but no more.zero stars

The crew were very hospitable and pleasant. The food was pretty good. Unfortunately, there was a flight delay of more than 2 hours. We're not sure why but it appeared to be outside the control of Turkish Airlines.

Bough tickets with luggage, but made me pay at Airport as well

It was a smooth flight both in the sky and landing!

The crew was really nice. The plane seats were kinda small even for a 5’6” / 158 lbs person.

Fare was great, seat comfort the opposite as cushion was worn out. Ok for 2 hour flight, not for 4.5 hour flight..

Fair. What's the point of partnering with United if we cannot use the lounge. My wife is a frequent flier with United but we were refused access to Air Canada lounge

Real smooth and easy, Real good leg room in coach!

Re luggage I carried a backpack only. I did not check any bags in. However there were other passengers with carry on luggage going in the plane. My question is why are others allowed to have a carry on luggage inside the plane? Shouldn’t they have dropped it off at the gate? I’m asking because I could have brought the same thing instead of a backpack only. Please clarify for future reference. Thank you.

Like the service. Very hard to communicate or contact when have problems

They rescheduled me and I had no issues with the new flight

No paper towels in bathroom. Aisle seat difficult to get out of Other than those, excellent service

Both flights are delayed so I rate the whole experience as mediocre.

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

Extremely pleased with the crew. Best flight attendants ever! Very friendly, genuinely caring and attentive.

Best flight attendants ever! Very customer and service oriented, courteous, professional and helpful.

Cheapest airlines I have ever been on. I got downgraded and never got on united. I got rerouted through Vancouver onto jetwesf

Very small and uncomfortable seats, Hard to hear entertainment system sound. Horrible food. Staff doesn't care much about the passengers. 2nd time they didn't give me my vegetarian meal. They asked me regular food with meat. The airline and staff was from United airlines.

Checkin took along timen only.few angents available at.checkin desk. Customer support over phone no existence

At baggage claim, I was given the wrong printed ticket. The ticket belonged to another passenger for a different flight — to Zurich instead of Frankfurt (layover). I was even allowed to pass security, and when I asked the Lufthansa employee if I was on the correct flight, and why it was changed. The employee said everything was correct and I should board. When I got on the plane, there was someone in my seat, and the crew on the plane finally realized that I was on the wrong plane. When I got off the plane, nobody was willing to help, and the security refused to provide my original printed ticket. That was until I showed them that I took a photo of the ticket; once they realized I had photographic evidence, they were suddenly ready to help me. The Lufthansa employee began communicating with other airlines and found a flight that would take me to my destination via Polish Airlines. I was required to once again go through security, re-check my bag, and once again pay for my checked bag and weight overage fees. This experience was incredibly stressful and very frustrating, as you can imagine. A Lufthansa employee told me I would be eligible for a refund. Please tell me what steps I need to take in order to make that happen. Thank you!

Good service … bus transfer upon arrival from plane to terminal: atrocious!!!

On both sides of my itinerary, the planes were old, the seats did not work, the seats were filthy, and the crew were unfriendly

-The seats could be roomier -The entertainment in English could be more current! The moves were very old!!! -They served too many carbs! What happened to fruit and yogurt!!!!

We upgraded to premium economy and it made a difference in a 12 hr flight. I didn’t like that we had to deplane in the tarmac with our carryon luggage. Other than that, it was ok.

Everything was much better than I had expected, since I hadn’t heard of your airline before. I hope to take advantage of your excellent service again.

Staff were nice, we left on time and arrived early, food was good. Unfortunately, they lost one of our bags and have been unable to find it. So we are in Italy for a week for my husband‘s birthday and he does not have any of his clothing.

It was Ok for Business class considering we paid almost $10K for two seats. Disappointing part was the $640 (RT) to reserve the seats prior to departure unlike other airlines that is complementary when buying business class seats. Would I use ITA to go to Europe on my next trip -NO.

They gave us sandwiches as a meal twice. Snacks mid flight with cookies and a tuna panini. Then just the same tuna panini for dinner. That was it.

The staff was very good, the only thing was the air conditioning wasn't working during the boarding process so it was very hot inside the plane until we got airborne. The food wasn't great, the chicken was dry and hard to cut, the ravioli was ok and the little pizza pocket thing was pretty bad. Other than that is was a good flight all around

Everything. Boarding, service, food, seats, crew I'd increase the air pressure to avoid dry sinuses and after effects

At least it was a direct flight, however the boarding process was a nightmare. 2+ hours in line to check my bag. Then told it was overbooked and I have to go standby even though I bought my ticket months ago. Then sent to another line to get on standby - another long wait and finally started yelling that my flight was boarding. They sent me somewhere else. In the end I did make the flight - among the last group to board, even though I arrived 4 hours early at the airport. Worst check in process I've ever experienced in 50 years off flying.

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

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