SOF - SFO

$405 Find Cheap Flights from Sofia to San Francisco

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Sofia to San Francisco departing on 12/2. 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 San Francisco

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

Cheapest round-trip
$687
Typical prices: $772-$878
Multiple Airlines
Thu 3/12Thu 3/19
SOF - SFO • 2 stops
Cheapest one-way
$405
Typical prices: $755-$778
Multiple Airlines
Tue 12/2
SOF - SFO • 3 stops
Top airlines
Lufthansa
Cheapest • from $851 (round-trip)
United Airlines
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
4 weeks
in advance
Our data shows that travelers who book at least 4 weeks in advance save around 34% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
February
Cheapest • 13% price drop
November
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to San Francisco!
Flight Deals
Booking Insights
Flight Deals

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

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Sofia to San Francisco 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 Sofia to San Francisco

Thu, Mar 12 - Thu, Mar 19
Multiple Airlines Logo
6:00 am - 3:35 pmSOF-SFO
42h 35m2 stops
Multiple Airlines Logo
5:40 pm - 2:55 amSFO-SOF
24h 15m2 stops
$687Multiple Airlines
Find Deal
Tue, Jan 20 - Sun, Jan 25
Multiple Airlines Logo
8:25 pm - 8:10 pmSOF-SFO
33h 45m1 stop
Multiple Airlines Logo
1:00 pm - 2:55 amSFO-SOF
27h 55m2 stops
$722Multiple Airlines
Find Deal
Tue, Jan 20 - Fri, Feb 13
Multiple Airlines Logo
4:45 pm - 3:09 pmSOF-SFO
56h 24m2 stops
Multiple Airlines Logo
6:40 pm - 7:00 pmSFO-SOF
14h 20m1 stop
$743Multiple Airlines
Find Deal
Tue, Jan 27 - Sun, Feb 1
Multiple Airlines Logo
8:25 pm - 8:10 pmSOF-SFO
33h 45m1 stop
Multiple Airlines Logo
1:00 pm - 2:55 amSFO-SOF
27h 55m2 stops
$746Multiple Airlines
Find Deal
Fri, Dec 12 - Thu, Jan 15
Lufthansa Logo
6:10 am - 12:40 pmSOF-SFO
16h 30m1 stop
Lufthansa Logo
8:25 am - 1:50 pmSFO-SOF
19h 25m2 stops
$851Lufthansa
Find Deal
Mon, Nov 17 - Sun, Nov 30
Lufthansa Logo
2:20 pm - 1:15 amSOF-SFO
20h 55m2 stops
Lufthansa Logo
6:50 pm - 10:45 pmSFO-SOF
17h 55m1 stop
$864Lufthansa
Find Deal
Tue, Mar 10 - Thu, Mar 19
KLM Logo
7:00 am - 7:28 pmSOF-SFO
21h 28m2 stops
KLM Logo
8:50 am - 2:05 pmSFO-SOF
20h 15m2 stops
$869KLM
Find Deal
Mon, Jan 26 - Wed, Feb 4
United Airlines Logo
2:20 pm - 8:10 pmSOF-SFO
15h 50m1 stop
United Airlines Logo
1:35 pm - 6:20 pmSFO-SOF
18h 45m2 stops
$882United Airlines
Find Deal
Tue, Jan 20 - Thu, Jan 29
United Airlines Logo
6:00 am - 3:55 pmSOF-SFO
19h 55m1 stop
United Airlines Logo
1:30 pm - 10:45 pmSFO-SOF
23h 15m1 stop
$884United Airlines
Find Deal
Fri, Dec 19 - Wed, Jan 21
Turkish Airlines Logo
4:00 pm - 11:05 amSOF-SFO
29h 05m1 stop
Turkish Airlines Logo
6:50 pm - 3:10 pmSFO-SOF
34h 20m1 stop
$888Turkish Airlines
Find Deal
Booking Insights

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

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

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

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

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

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

For Sofia to San Francisco, Saturday is the cheapest day to fly on average and Sunday is the most expensive. Flying from San Francisco back to Sofia, the best deals are generally found on Thursday, with Friday being the most expensive.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Sofia to San Francisco, 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 Sofia to San Francisco is February, where tickets cost $798 (return) on average. On the other hand, the most expensive months are January and August, where the average cost of round-trip tickets is $1,195 and $1,074 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Sofia to San Francisco, 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 Sofia to San Francisco, you should book around 4 weeks before departure, which saves you about 34% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 4 weeks before departure.

Good to know

Low seasonFebruary
Cheapest flight$405
Best time to beat the crowds with an average 14% drop in price.
Most popular time to fly and prices are also 3% lower on average.
Flight from Sofia to San Francisco

When to book flights from Sofia to San Francisco

Are your dates flexible? Find out the best times to travel from Sofia to San Francisco 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 Sofia to San Francisco

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

    In the last 3 days, the lowest price for a flight from Sofia to San Francisco was $405 for a one-way ticket and $687 for a round-trip.

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

    Yes, you'll most likely have to show a valid passport before boarding the plane in Sofia and on arrival in San Francisco.

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

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

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

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

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

    The two airlines most popular with KAYAK users for flights from Sofia to San Francisco are United Airlines and Turkish Airlines. With an average price for the route of $941 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 $866 and an overall rating of 7.3.

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

    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 Sofia to San Francisco.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Francisco from Sofia 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 Sofia to San Francisco?

    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 San Francisco with an airline and back to Sofia with another airline. Booking your flights between Sofia and SFO 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 Sofia to San Francisco?

    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 San Francisco from Sofia up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 3 airlines serving from Sofia to San Francisco

 
See real verified KAYAK customer reviews for airlines flying from Sofia to San Francisco. 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 Sofia to San Francisco? 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 9003 reviews
6.6Food
7.1Entertainment
7.3Comfort
8.1Crew
7.7Boarding
Airline reviews

7 hours delayed due to operational issues on United’s end. Basically laziness.

2.0 MediocreGray, Nov 2025IAD - SFO
Read more United Airlines reviews

7 hours delayed due to operational issues on United’s end. Basically laziness.

Flight from Rome to SFO was excellent compared To our flight to Europe from SFO. The food was much tastier. You can see how UNITED is skimping, though. Instead of getting something mid flight you had to ask for it. It was not automatically served. There was a cookie at the end of the arrival meal, for example that tasted like it just came out of a box. They used to serve a little container of nuts, now … a tiny container of nuts, mixed with pretzels. This was business class that you really have to pay for! But this is minor complaints compared to the overall. My major complaint is the position of the even numbered seats by the windows. You have to turn around to see your window & the positioning as some other controls are harder to get at. This is compared to the odd number seat that are perfectly aligned.

The food quality sucks. One must starve if they do not eat flesh Or wheat based products Some variety would be expected. The trivial amount of snacks and or food is inhumane

The internet service I paid for didn’t work at all and the flight crew was not very friendly.

Subject: Formal Complaint: Discriminatory and Unprofessional Conduct – Request for Immediate Action & Compensation Dear [Airline Customer Relations Team], I am writing to file a formal complaint regarding my recent travel experience with [Airline], which was by far the worst I have ever encountered. What occurred was not only unprofessional, but in several instances discriminatory, unsafe, and unacceptable. On the first leg of my trip, I arrived only four minutes past check-in. Instead of making any attempt to resolve the matter, your representative flatly denied me boarding and made me wait while she attended to passengers who arrived after me. By the time a manager intervened, it was too late to board, costing me time, money, and unnecessary frustration. The second leg of my trip (Chicago–San Francisco) raised even more serious concerns. From the outset, it was apparent that the staff—particularly two attendants—prioritized Caucasian passengers while dismissing African American and minority passengers. • When a Caucasian passenger in the exit row refused to comply with federal safety requirements, I, as a first responder, immediately offered to switch seats and assume the responsibility. My offer was blatantly ignored, and instead, a Caucasian passenger seated further up was chosen. This was discriminatory and deeply insulting, especially as I was actively de-escalating the situation that could have delayed the flight further. • During a lengthy tarmac delay of over 90 minutes, passengers were given conflicting and unreasonable instructions that created unnecessary distress and tension. • Throughout the flight, a visibly intoxicated passenger directly in front of me was disruptive, rude to others, failed to comply with seatbelt and electronic device rules, and yet faced no enforcement from the crew. In stark contrast, I was singled out for repeated compliance checks even though I was following every rule. This unequal treatment was so obvious that multiple passengers around me spoke up in my defense. This pattern of behavior demonstrated a clear lack of professionalism, disregard for passenger safety, and discriminatory treatment. I expect far better from an airline of your stature. As a paying customer subjected to this unacceptable treatment, I am formally requesting: 1. A full investigation into the conduct of the staff on both flights. 2. A written apology acknowledging the discriminatory and unprofessional behavior I endured. 3. Appropriate compensation for the distress, inconvenience, and mishandling of my travel. If this matter is not addressed promptly and thoroughly, I will have no choice but to escalate my complaint further, including filing with the U.S. Department of Transportation and sharing my experience through other channels. I trust [Airline] will take this complaint seriously and provide a timely resolution.

1. when we went to check in, our 2 first class seats had been CANCELED and the flight was sold out. This was done without our prior knowledge. It was all we could do to restore one first class seat for my wife and I flew economy. 2, Our flight home was scheduled to leave at 10:30 pm. Due to tsunami warnings, the roads were closed and our flight status was uncertain as to whether it would leave as scheduled. It was announced that it would now leave at 11:20 pm and the roads were now open since the tsunami had come and gone. We made a mad dash to the airport and checked in. Delays were announced at 12:30 pm, 1:30 am, 2:30 am and at 3:30 am it was canceled. Since this was a flight due to natural (tsunami) causes, there was no compensation. We were told to return at 1:00 pm the next day and our baggage would be kept on the plane since the same plane was going to leave at 1:00 pm. We had to return to our hotel for the rest of the night. The same plane did not leave at 1:00 pm and our baggage was gone! All in all, it was a miserable performance by UA. Information was hard to obtain and no one knew what was going on and what was going to happen. Hundreds of passengers slept on the floor, chairs, etc. No food and no water was made available to the passengers. It was a situation where UA could care less what was going on. As a one million mile flyer, I had not experienced anything like this before and it was hugely disappointing!

I found the staff to not be very attentive at all. When paying for Business Class you expect a certain type of service and that was not found. They were almost rude even

Our experience on United Airlines was extremely poor. The plane was extremely cold throughout our entire flight- which multiple people complained about- and we had to wait 2 hours to get a blanket which was too thin and barely helped warm us up. As well as this, none of the entertainment features were working so we had to sit through a roughly 10 hour flight with nothing to keep our attention, including the actual flight path screen. It was an extremely disappointing experience and I would hope that this gets fixed if we ever choose United Airlines again.

I really enjoyed flying with United airlines amazing experience , good customer service and great food

1.It will be better if sandwich is warm. 2.The food is too salty. 3.Breakfast needs some vegetables or fruits.

They can my date of travel and let me standard in Istanbul for three days stop over and only pay for one day in a hotel with only one breakfast for three days.

the flight was cancelled and I was rebooked twice, once 26 hours later, then another 24 hours later. In total the flight was delayed for 40 hours. Never again will I use kayak or Turkish Airlines for my travel.

Worst experience with boarding once we left the wheel chair even traveling business we had to wait with all the crowd for the bus to take us to the plane then climb the stairs with our bags When you pay extra for comfort and convenience and you don’t get any is disappointing

Food is very turkish. No regard for other natinalities taste and preference. The entertainment can be improved- it was the same menu on 10/8/25 and 10/25/25. The boarding is the worst in the airline industry- I suggest you ask your staff to and watch how other airlines do it.

The best airline for international travel in terms of value you get in business class (service/cost)

I liked the overall flight experience. However, Turkish officials could do a better job at guiding non-Turkish speakers to their connecting flight gates in such a huge & vast airport.

Very small and cramped aisles and seats. Food was poor but the fresh hot roll and hummus was good. No cans of soda given but they had small bottles of water. Crew was nice and pleasant and kept bathroom clean.

We couldn’t fly to Chicago on our booked flight. The flight was overbooked.

Small seat space for 13 hours flight, they charged for baggage , very bad quality of food,

I was sitting almost in the back, the seats are very tight and there’s no legroom, it’s uncomfortable for a long distance

Smooth flight with enough time for connection. Ran out of meal options. In-flight and gate staff were friendly and helpful. Good service overall.

The seat space seemed small especially when the person ahead reclined but other than that, very good.

Luggage transfer in Chicago was not performed in time. I received my luggage at my destination two days later.

Give yourself over 2+ hours layover because if flight is slighlty delayed and you miss your connection, Lufthansa will do nothing for you

We would have missed our connection from Munich to Boston but we had a van outside the plan that wisked us to our terminal. Much appreciated and we didn’t even realize that Lufthansa had done this until the announcement on disembarkation. Well organized airline! Will definitely fly Lufthansa again!!!

Everything went well. I will fly with Lufthansa again. And use Kayak whenever I book flights

Bought a seat in a flight that got changed out so ended up paying for a seat I would have had if I hadn't paid.

Food was poor quality and the screens for entertainment didn’t work properly

Food was much better than my outbound flight. On-time. Good service. I had a problem with my entertainment screen, but the attendant fixed it promptly.

I think they overbooked Frankfurt to New York and bumped me off. This changed my return travel I arrived home about 4 hours late. Almost 24 total travel time Totally unacceptable Would not travel with United

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