SOF - BOS

$405 Find Cheap Flights from Sofia to Boston

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 Boston departing on 5/8. 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 Boston

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Sofia to Boston.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Sofia to Boston.
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Everything you should know

Cheapest round-trip
$599
Typical prices: $683-$820
Multiple Airlines
Wed 6/17Tue 7/7
SOF - BOS • 1 stop
Cheapest one-way
$405
Typical prices: $673-$703
Multiple Airlines
Fri 5/8
SOF - BOS • 2 stops
Top airlines
Cheapest • from $690 (round-trip)
Best reviews • 7.8 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Sofia and Boston. You'll need at least 1 connection.
Insights
Insights
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Insights
Top layover airports
Cheapest • Avg $734 (round-trip)
Shortest trip • 11h 28m (one-way)
Insights
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Insights
When to book
in advance
Our data shows that travelers who book at least 2 weeks in advance save around 20% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 13% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Boston!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Sofia to Boston (SOF-BOS)

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

Wed, Jun 17 - Tue, Jul 7
Multiple Airlines Logo
9:40 pm - 9:05 pm
SOF
-
BOS
30h 25m
1 stop
Multiple Airlines Logo
11:00 pm - 9:15 pm
BOS
-
SOF
15h 15m
1 stop
$599Multiple Airlines
Wed, Jun 17 - Thu, Jul 9
Multiple Airlines Logo
9:40 pm - 9:05 pm
SOF
-
BOS
30h 25m
1 stop
Multiple Airlines Logo
11:00 pm - 1:15 pm
BOS
-
SOF
31h 15m
1 stop
$630Multiple Airlines
Wed, May 27 - Tue, Jun 9
Multiple Airlines Logo
9:40 pm - 9:05 pm
SOF
-
BOS
30h 25m
1 stop
Multiple Airlines Logo
10:50 pm - 9:45 am
BOS
-
SOF
27h 55m
1 stop
$635Multiple Airlines
Tue, Jun 16 - Thu, Jul 9
Multiple Airlines Logo
11:25 pm - 9:05 pm
SOF
-
BOS
28h 40m
1 stop
Multiple Airlines Logo
11:00 pm - 1:15 pm
BOS
-
SOF
31h 15m
1 stop
$652Multiple Airlines
Wed, May 27 - Tue, Jun 9
Multiple Airlines Logo
6:30 am - 9:05 pm
SOF
-
BOS
21h 35m
2 stops
Multiple Airlines Logo
10:50 pm - 1:35 am
BOS
-
SOF
19h 45m
1 stop
$686Multiple Airlines
Fri, Jun 19 - Fri, Aug 7
Turkish Airlines Logo
2:05 pm - 7:55 pm
SOF
-
BOS
12h 50m
1 stop
Turkish Airlines Logo
9:50 pm - 8:15 pm
BOS
-
SOF
15h 25m
1 stop
$690Turkish Airlines
Fri, Jun 19 - Fri, Aug 7
Turkish Airlines Logo
2:05 pm - 7:55 pm
SOF
-
BOS
12h 50m
1 stop
Turkish Airlines Logo
9:50 pm - 8:15 pm
BOS
-
SOF
15h 25m
1 stop
$693Turkish Airlines
Mon, Apr 6 - Wed, Apr 22
Turkish Airlines Logo
3:50 pm - 7:55 pm
SOF
-
BOS
35h 05m
1 stop
Turkish Airlines Logo
9:50 pm - 1:15 pm
BOS
-
SOF
32h 25m
1 stop
$694Turkish Airlines
Fri, Jun 19 - Fri, Aug 7
Turkish Airlines Logo
2:05 pm - 7:55 pm
SOF
-
BOS
12h 50m
1 stop
Turkish Airlines Logo
9:50 pm - 8:15 pm
BOS
-
SOF
15h 25m
1 stop
$698Turkish Airlines
Mon, Apr 6 - Mon, Apr 20
Turkish Airlines Logo
3:50 pm - 7:55 pm
SOF
-
BOS
35h 05m
1 stop
Turkish Airlines Logo
9:50 pm - 8:15 pm
BOS
-
SOF
15h 25m
1 stop
$702Turkish Airlines
Booking Insights

KAYAK's insights & trends for Sofia to Boston flights

Get data-powered insights and trends into flights from Sofia to Boston 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 Boston?

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 Boston departing in June.

What is the cheapest month to fly from Sofia to Boston?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Sofia to Boston, 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 Boston is January, where tickets cost $652 (return) on average. On the other hand, the most expensive months are February and December, where the average cost of round-trip tickets is $860 and $827 respectively.

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

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 Boston, 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 Boston, you should book around 2 weeks before departure, which saves you about 20% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 24 weeks before departure.

Good to know

Low seasonJanuary
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 Boston

When to book flights from Sofia to Boston

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

  • What is the cheapest flight from Sofia to Boston?

    In the last 3 days, the lowest price for a flight from Sofia to Boston was $405 for a one-way ticket and $599 for a round-trip.

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

    A passport is required to fly from Sofia to Boston.

  • Which aircraft models fly most regularly from Sofia to Boston?

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

  • Which airline alliances offer flights from Sofia to Boston?

    SkyTeam, and Star Alliance are the airline alliances operating flights between Sofia and Boston, with SkyTeam being the most commonly used for this route.

  • Which is the best airline for flights from Sofia to Boston, KLM or Austrian Airlines?

    The two airlines most popular with KAYAK users for flights from Sofia to Boston are KLM and Austrian Airlines. With an average price for the route of $681 and an overall rating of 7.8, KLM is the most popular choice. Austrian Airlines is also a great choice for the route, with an average price of $682 and an overall rating of 7.6.

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

    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 Boston.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Boston 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 Boston?

    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 Boston with an airline and back to Sofia with another airline. Booking your flights between Sofia and BOS 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 Boston?

    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 Boston 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 5 airlines serving from Sofia to Boston

 
See real verified KAYAK customer reviews for airlines flying from Sofia to Boston. 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 Boston? 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.
7.8
KLMOverall score based on 1471 reviews
7.6Comfort
7.8Boarding
8.4Crew
7.1Entertainment
7.3Food
Airline reviews

It was really nice journey i personally recommend klm flight

10.0 Excellentsmit, Mar 2026
AMD - BLR
Read more KLM reviews

It was really nice journey i personally recommend klm flight

Crew is not the cheerful type. very slow meal service (this is their style as have flown this many times)

Empty seats next to me - wish it had been for a longer flight!!

I’m grateful for the KLM Air France shuttle bus service to Ottawa. However due to construction and other issues related to the chaotic Uber pickup system at YUL, it’s a challenge to find the Kelios bus service to Ottawa. The signs are not clear or even available. No staff to guide passengers. It’s a stressful experience.

Flight was on time, staff are friendly and helpful onboard.

Terrible last row seats many seats available but no offer to move to better seat

Delay on my previous leg, had to run to catch my flight. But that happens. Overall ok.

Delay and had to run between flight to get my connection due to this delay but besides that the overall experience was ok. I arrived with just an hour of delay.

At the airport, terrible, I do not want to even remember it. It was too humiliating for a business class passenger.

Flight was ok but lack of communication cost me to literally beg to be put on another flight as connecting flight had departed

We were delayed three hours from Montenegro to Vienna on our outbound flight and then rebooked an extra leg on our trip to the US. Our bags, which Austrian made us check in in Montenegro even though the flight was barely half full, didn't find us for ten days. Then, when we asked for compensation for the delay we were given the runaround that the flight originated outside of the EU. Next time we fly Turkish Air.

My Austrian Air flight from Montenegro to Vienna was delayed by three hours because their plane de-icer was broken and they had to wait for the sun to come up before the ice could melt. This meant we missed our United flight altogether. So I can't speak about United, but I was not impressed by Austrian Air. They made us check in two carry on bags for a 60% full flight, and the bags didn't find us in the US for ten days. The re-routing they arranged included an extra leg, a midnight taxi ride across New Jersey and New York, and a five hour sleep in a hotel. Not impressed.

Most of the crew members were rude, flight arrived late and we missed our connecting flight, they damaged my friends suitcase so badly that two wheels had been destroyed.

Excellent flight. The crew was exceptionally attentive and organized. Attention to details is unmatched.

Loved the courtesy and punctuality. Very professional and most importantly on time.

Great! They got my vegetarian meal right, flight was comfortable, they helped store my heavy luggage. Pleasant crew and flight staff.

I did wish they would give us the entire little bottle Bailey's instead of just have 1/2 bottle at a time

My layover in Vienna was supposed to be 35 minutes but because my flight was canceled I had to wait in the airport for an additional 8 hours.

They had me unpack a handbag 2 lbs overweight into another handbag 8 lbs underweight for a Bible.

My flight was canceled and even though I paid אם KAYAK you didn't even answer me and obviously didn't refund my money. I will never buy a ticket through you again.

Everything was on time and service on the flight was great!

The boarding in Buenos Aires (at the on ramp) was not great. They had to check every carry on. Not a United problem but was a Buenos Aires problem.

Staff and aircraft were good. However, weather in Houston lee to a ground stop. We were looking at circling behind three other planes until the stop was lifted. Pilot said we didn’t have enough fuel for that. So we flew on to New Orleans as the closest port with immigration and customs staff. Landed there and sat in the plane for two hours plus while staff was sorted. Turned away by ICE. Waited for pilots to be switched out, but after they were approved by ICE. Then had to wait to get a runway because so many planes were ahead of us. Finally took off and flew back to Houston. We all missed our connecting flights because it took too long. Hotel voucher from United was only a link to booking site. Total BS. Finally got a flight out the next day after a night without sleep because all the Houston hotels were booked by rodeo and spring break crowds.

Wifi Bluetooth features for watching in flight movie was horrible. Screen kept blacking out no connection of sound although it said connected. Other than that smooth trip .

I paid $7,000 to fly round trip to Porto. I thought it was for business class. But on the leg from Miami to Newark, and again from Newark to Miami, i was in coach. One time in the middle seat of coach. From Newark to Porto I was in business class as expected, and it was fine. I fly to Portugal once per month, often paying $5,000 for business class. Usually i fly American Airlines. I'd be happy to fly more with United Airlines. But my experience was disappointing because i was put in the coach for almost half the flights.

The travel company that you have on your site did me so wrong. I don’t know how it happened, but they put my son‘s name on my plane ticket flying to Vietnam. Along with his birthday. They would not have let me fly from Fort Myers to Ho Chi Minh City. I don’t think that I can ever use your service again. I typed my information into the browser along with my passport number and four days before I’m leaving I have to quickly search another ticket to fly out here.

Seats are uncomfortable. This has been a trend in the industry for decades. Trying to fit more seats on each plane to increase profits at the expense of the passenger.

The flight was delayed so we were dead tired, and after that the turbulence was horrible. I was very scared.

It was okay, the food was good, but after the landing there was not enough time for luggage and security to catch a connection. It was crowded on board.

It’s always a great time flying with united airlines.

Extremely bad BAD BAD BAD. NEVER TURKISH AIRLINES EVER AGAIN..PIRATES COMPANY.

Typically great service from Turkish with comfortable seat and amenitie, good food and great attention from staff.

Delicious food, comfortable and clean plane. It's a little cramped in the hall in front of the gate.

Very hot cabin made long flight uncomfortable, even in business class! Food was great. Istanbul business lounge had great food but too few bathrooms and seating . They also need more electric outlets for charging devices. Appreciate the ability to go through fast track lines w business class

The crew on this flight provided exceptional business class service to me.

The staff at the boarding or the rudest uninformative and no English whatsoever they’re very rude as if they are envious of you travelling I don’t understand how could someone would be this rude and this out of touch and cold

You charged me for luggage although the airline does not- you charged me for seat when customers can pick their own seat at checkout in I travel to Europe slot and I will not use kayak again

The seats were extremely small. Boarding was not communicated correctly. It wasn’t a pleasant trip.

They oversold the tickets by one which was my ticket so I didn’t have a ticket till last second

Not good. I was supposed to be in Mint but got in economy class

How about changing the personal out to more friendly human beings? This team was pretty arrogant. No fun!!

Everything could have been better. What needed to be wrong with United went wrong

Excellent service. The crew goes above their way to make the customer comfortable.

It was good. The seats in economy weren’t bad

I hated the FRA Airport. Confusing signage, including the path to Immigration and Security It seems that the airport grew haphazardly over the years. I have been through multiple WW Hubs with much better experiences.

Excellent service; they helped me reschedule so I can fly in an earlier flight

Wonderful staff. The boarding process can be improved a little better by adequate prior communication but all in all they did fine. However the boarding gate was quite unfreindly to elderly and who needs help with sevral stairs.

Flight map did not work. Crew was great, food was good, plane took off on time and landed early. That's all I can ask.

I had a good comfortable seat. There was nearly an hour delay. There was an accident with the champagne, but I was well compensated. These things happen sometimes.

Very good. Comfortable and I felt well taken care of from start to finish

Everything you need to know for your flight from Sofia to Boston

Information on your arrival and departure airports