$338 Find Cheap Flights from Boston to Bulgaria - 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 Boston to Bulgaria departing on 7/12. 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

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Cheap Flights from Boston to Bulgaria

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Sofia
Sofia3 stops$836
Varna
Varna1 stop$714
Burgas
Burgas1 stop$792
Sofia
Sofia3 stops$836
Varna
Varna1 stop$714
Burgas
Burgas1 stop$792

Book Cheap Boston to Bulgaria Plane Tickets

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

Tue, Aug 25 - Tue, Sep 15
Turkish Airlines Logo
9:50 pm - 9:20 pm
BOS
-
VAR
16h 30m
1 stop
Turkish Airlines Logo
9:20 am - 7:55 pm
VAR
-
BOS
17h 35m
1 stop
$714Turkish Airlines
Thu, Aug 27 - Tue, Sep 15
Turkish Airlines Logo
9:50 pm - 9:10 am
BOS
-
VAR
28h 20m
1 stop
Turkish Airlines Logo
9:20 am - 7:55 pm
VAR
-
BOS
17h 35m
1 stop
$729Turkish Airlines
Wed, Aug 26 - Tue, Sep 15
Multiple Airlines Logo
8:50 pm - 1:30 am
BOS
-
VAR
21h 40m
2 stops
Multiple Airlines Logo
5:00 am - 6:35 pm
VAR
-
BOS
44h 35m
3 stops
$772Multiple Airlines
Mon, Aug 17 - Wed, Sep 23
Multiple Airlines Logo
9:15 pm - 10:35 pm
BOS
-
BOJ
18h 20m
1 stop
Multiple Airlines Logo
9:50 am - 9:05 pm
BOJ
-
BOS
42h 15m
2 stops
$792Multiple Airlines
Thu, Aug 27 - Tue, Sep 15
Multiple Airlines Logo
5:25 pm - 10:55 pm
BOS
-
VAR
22h 30m
2 stops
Multiple Airlines Logo
5:00 am - 6:35 pm
VAR
-
BOS
44h 35m
3 stops
$796Multiple Airlines
Mon, Aug 10 - Tue, Aug 18
SWISS Logo
9:40 pm - 8:10 pm
BOS
-
VAR
15h 30m
1 stop
SWISS Logo
9:10 pm - 7:55 pm
VAR
-
BOS
29h 45m
1 stop
$822SWISS
Sun, Oct 18 - Fri, Oct 23
United Airlines Logo
8:05 pm - 11:15 pm
BOS
-
SOF
20h 10m
1 stop
United Airlines Logo
8:00 am - 1:50 pm
SOF
-
BOS
12h 50m
1 stop
$839United Airlines
Fri, Oct 23 - Tue, Nov 17
Austrian Airlines Logo
12:36 pm - 11:40 am
BOS
-
SOF
16h 04m
2 stops
Austrian Airlines Logo
7:55 am - 1:30 pm
SOF
-
BOS
12h 35m
1 stop
$841Austrian Airlines
Mon, Oct 19 - Tue, Oct 27
United Airlines Logo
9:51 am - 12:10 pm
BOS
-
SOF
19h 19m
2 stops
United Airlines Logo
7:55 am - 2:30 pm
SOF
-
BOS
12h 35m
1 stop
$843United Airlines
Mon, Aug 17 - Wed, Sep 23
Lufthansa Logo
5:45 pm - 6:20 pm
BOS
-
BOJ
17h 35m
1 stop
Lufthansa Logo
12:35 pm - 5:40 pm
BOJ
-
BOS
12h 05m
1 stop
$875Lufthansa
Booking Insights

KAYAK's insights & trends for Boston to Bulgaria flights

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

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Boston to Bulgaria, 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 Boston to Bulgaria is October, when tickets cost $316 (return) on average. On the other hand, the most expensive months are May and July, when the average cost of round-trip tickets is $461 and $421 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Boston to Bulgaria, 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 Boston to Bulgaria, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 26 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$338
Best time to beat the crowds with an average 16% drop in price.
Most popular time to fly with an average 18% increase in price.
Flight from Boston to Sofia

FAQs - booking Bulgaria flights

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

    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 Boston to Bulgaria.

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

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

    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 from Boston to Bulgaria with an airline and back with another airline.

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

    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 from Boston to Bulgaria 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 Boston to Bulgaria

 
Need help choosing which airline to fly with from Boston to Bulgaria? 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 1531 reviews
7.8Boarding
8.4Crew
7.3Food
7.7Comfort
7.2Entertainment
Airline reviews

The crew were unprofessional with a racist element. I was physically abused as well from one of the crew members

2.0 MediocreNewton, Mar 2026
IAD - AMS
Read more KLM reviews

The crew were unprofessional with a racist element. I was physically abused as well from one of the crew members

They forgot to serve food and the crew was very unfriendly. Never experienced such a bad KLM flight. Usually fly from Toronto. New York was different.

Over 1 Hr delay. No APU so no AC on ground. Plane was hot during boarding and then they closed the doors over 20 minutes before engine start so interior of plane was steamy hot and stuffy. Could have been helped by opening doors until ready to depart.

My flight was delayed by 6 hours then I missed BOTH of my connecting flights, I then had to stay in the AIRPORT at JFK because soooooo many people also suffered from missing flights and there was no hotels available. I would like to be compensated for this experience! I had to stay in the airport for over 16 hours!

Cabin crew were excellent, very proffesional, polite and friendly, in flight snack was underwhelming, a packet of cheese biscuits, im sure KLM could run to a sandwich!

Overall very positive. Boarding was quick and organized. Cabin was clean and seats were reasonably comfortable. Cabin crew was excellent and the meals provided were also of good quality

This fight left ahead of time which meant it arrived early which was great. Staff were very professional, but as with all these Short hop Flights the food was a disappointing snack There was no entertainment on this flight, but I did not expect any

Transfer at CDG to connecting KLM flight to Amsterdam was a NIGHTMARE. LONG WALKWAYS, NO MOVING WALKWAYS, POOR signage, Have to take a train & No staff visible to help navigate the maze. AVOID TRANSFER AT CDG AT ALL COST.

Seats were comfortable crew members support was very good but AVML ordered or selected by us needs a lot of improvement.

The IFE was quite old, but it worked fine and the content was good. The cabin crew were excellent and the food was as also very good

I am very satisfied for choosing that Airlines! It was my first time but the everything went smoothly! Thank you!

This is truly the worst travel experience of my life. The UK ETA program had a technical failure, and I was stuck in limbo for 24 hours, unable to board my flight and unable to navigate anything in my itinerary. I had to rebook an entirely new flight and I’m now out doubled the money. Unconscionable.

OK, would prefer some meat for dinner, not just pasta although was tasty. There was only one dish, no choices

Flight delayed with no explanation. Boarding was confused (proceed to plane, go back to waiting area).

It was a great experience. The aircraft is a bit dated but other than that it was great.

Last few years I didn't not have great experience with United Airlines.

Booked economy. Seat felt like it was a bit more roomy than my last trans Atlantic flights. I had a nice person sitting next to me. Everything was as good as it could be considering you are 35,000 feet up in the air and in a metal container. Beers, wine, food were all readily available. Plenty of movies and shows to watch. Friendly flight staff

We have travelled on 13 December with Austrian Airlines from Yangon through Bangkok and Vienna to Varna. The first flight operated by Thai Airlines was nice and comfortable. I wouldn’t say the same thing about the next two flights which were operated directly by the Austrian Airlines. During our flight from Bangkok to Vienna:  > The service was very poor – serving of food and drinks was disorganized, late and not combined, the stewards were walking back and forth without doing anything substantial for the passengers. Even the morning breakfast was very late with a cup of coffee almost while landing (after a reminding).  > The food itself was OK-ish but for a 12-hour flight, there were no snacks/bites in between dinner and breakfast as it is with the other airlines.  > The cutlery was wooden, most probably recycling, but very unpleasant to eat with.  > The stewards were not rude but not friendly and/or helpful  > And also, half of the passengers had travel sets, others did not. The flight from Vienna to Varna was another surprise: firstly, the flight was late and secondly, they were serving only water free, even the coffee was paid, so were the snacks, but we had to pay to reserve seats. The whole experience is as if it was a low-cost airline. All in all, I wouldn’t recommend using the services of Austrian Airlines: the ticket prizes are quite the same as of the other carriers flying to this destination and you would have much pleasant time.

They never gave any meal during the flight. We’ve flown for years and then doing this now is ridiculous.

The flight was late. We accommodated other missed flights, and the plane was full of people, without space to store carry-on luggage. They lost our checked luggage for the entire flight and delivered it after two days.

To get to jet blue at JFK from any connecting flight you have to go through security again.

Amazing! One of the best kept secrets in air travel!

We fly Bussines class and we didn’t feel like it is. Out luggage didn’t arrive and we have to return again next day from our hotel to airport to get them. Still waiting. No information from Turkish airlines Very poor customer service I think booking through kayak it was wrong decision

Could have been better. Bag rechecking could have been eliminated. Gate location and direction need to be clearly stated.

I flew Business with my daughter and son. The service, friendliness of the staff and the comfort of the fully flat beds were phenomenal. Would definitely fly Turkish again soon.

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

As a first time flyer with Turkish Airlines. My experience was very good due to the factor that there were to many passengers on the my first flight compared to my connecting flight. However, I know that nothing is perfect and all companies are trying to accommodate their passengers to the best way possible. I will always say, a FEW INCHES will go LONG WAY. That's something all airliners should consider, and not only the money aspect!!! A long time commitment is better than one time service! Thank you

My experience with Turkish airlines has been pretty good. I connected from Istanbul to Tirana Albania. One of my luggage’s didn’t come. Very disappointed with that, we had our year old grandson with us! Babiest things were in that bag . Hopefully I get the bag tomorrow or next day !

We were traveling first class. Checkin counter lady and her manager, both were in bad mood and did not treat us well about checking in the handbag. The gate agent took care of it right away. I travel Turkish twice a year in first class. No one has ever refused to check in the hand bag. Not sure, why this agent and her manager refused. Everything else was excellent.

The cabin crew was excellent. They were fully staffed and very helpful. The food on the fight was quite good for surpassing my expectations of “airline food“

Boarding was great, and the crew were very friendly. The seats must have been a bit on the older side and you could feel some of the seat components through the padding. Also, the plugs did not work on the row's entertainment screen or charging ports. Checked bag was transferred for connecting flight, and we appreciated how early we had the connecting gate information.

It was Swiss. Our kosher meals were literally frozen solid and therefore inedible, and the crew didnt care.

Food was great. Staff was phenomenal. Seats were a bit hard and could use a lot more entertainment options as far as movies to choose from. WiFi was good. Overall great trip.

The flight was delayed, they didn’t even have water for the toilets or for drinks

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

Very old flight - time to retire it for newer airplanes

2+ hours delayed Outlet in row 12 did not work Tv monitors did not work Lights kept off the entire flight for at 5pm-7pm flight

Seated dude next to me even though lots of empty rows. But main thing was we sat on the tarmac after landing for 30 minutes because of, in the words of the dude who sat next to me, “operational incompetence”. We got changing directions about where to pick up gate checked bags. Pilot and flight attendant were awesome though.

They brought an empty plane to the gate. Then a flight delay was announced for maintenance and waiting on a part. I was then put on a flight to San Francisco instead with a connecting flight to my final destination. Arrived at my final destination 2 hours late.

Tastless food and too obvious lack of enthusiasm for service in the economy vesus business class

We didn't get the coffee with breakfast in the morning.. 30 mins lazer I asked flight attendant why don't we get coffee now at least.. after the breakfast..she said that captain announced possible turbulences fee minutes ago, which didn't ecplain why we didn't get it with the breakfast..breakfast was very poor btw..just little pastry which you can eat in 4 little bites. Turbulences fortunately didn't even happen.. but we didn't get that more than necessary coffee in the morning after the night flight with very poor sleep.. They just served breakfast 1 hour afzer we took off..at like 11 PM.. that doesn't make sense at all.. Also, flight attendants weren't very nice..they looked like they're not happy with their job.. :/

Flight was 1.5 hours late to depart so changed flights to Swiss Air.

Entertainment was good. Food was mediocre. Service was mediocre. New plane was smooth

Staff was great. Space in bathrooms was very good. Boarding went smoothly due to aisles. I would like more room in coach. 2 more inches would be helpful. Lost luggage was a big issue; more on the administrative side than flight related, but diminished the flight experience.

Flight was cancelled and I got rebooked with anther airline. Also had booked a direct flight and got a layover.

The seats are designed for 12 years old, but pretty uncomfortable for the average adulte!!

Boston Logan is a crummy airport - signage is terrible or lacking in areas. Boarding seemed to be a free for all and with all the different airlines speaking, you couldn't tell who was supposed to be where and when. Plain and simple, airlines should board from the back of the plane to the front. Also someone was sitting in my seat. By the time that was figured out, I had to place my overhead behind me which made de-planing more difficult. Logan is not Lufthansa's fault so that is not on them, Boarding is on them! Still, overall it was a Good Experience flying with Lufthansa. This is not my first flight with them...

The Lufthansa part was wonderful. The short connection flight was not.

Both flights were late for what appeared to be the airline’s not having the planes ready. Arrived over 6 hours late.

Seats were not the most comfortable and food options weren’t great but overall but everything else was excellent

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

Information on your arrival and departure airports