SOF - BOS

$419 Find Cheap Flights from Sofia to Boston - Compare and Save

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1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$715
Typical prices: $718-$897
Multiple Airlines
Wed 12/12Fri 1/26
SOF - BOS • 2 stops
Cheapest one-way
$419
Typical prices: $437-$769
Multiple Airlines
Sat 4/21
SOF - BOS • 2 stops
Nonstop flights
Not available
There are currently no direct flights between Sofia and Boston. You'll need to take a connecting flight to reach the destination.
Insights
Insights
When to book
22 weeks
in advance
Our data shows that travelers who book at least 22 weeks in advance save around 10% compared to booking last minute.
Insights
Insights
When to travel
January
Cheapest • 12% price drop
June
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Barcelona-El Prat (BCN)
Cheapest • Avg $572 (round-trip)
Vienna Intl (VIE)
Shortest trip • 11h 56m (one-way)
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Insights
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Flight Deals

Cheap Flights from Sofia to Boston (SOF-BOS)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Sofia to Boston

Sat, Dec 12 - Tue, Jan 26
Multiple Airlines Logo
10:10 pm - 2:00 pmSOF  Sofia-BOS Boston Logan Intl
22h 50m2 stops Barcelona-El Prat Lisbon Humberto Delgado
Multiple Airlines Logo
5:15 pm - 1:55 pmBOS  Boston Logan Intl-SOF Sofia
13h 40m1 stop Dublin
$715Multiple Airlines
Sat, Dec 12 - Mon, Jan 25
Multiple Airlines Logo
10:10 pm - 7:55 pmSOF  Sofia-BOS Boston Logan Intl
28h 45m2 stops Barcelona-El Prat Lisbon Humberto Delgado
Multiple Airlines Logo
5:15 pm - 1:40 pmBOS  Boston Logan Intl-SOF Sofia
13h 25m1 stop Dublin
$719Multiple Airlines
Sat, Nov 21 - Mon, Nov 30
Turkish Airlines Logo
9:30 am - 6:05 pmSOF  Sofia-BOS Boston Logan Intl
15h 35m1 stop Istanbul
Turkish Airlines Logo
8:00 pm - 3:10 pmBOS  Boston Logan Intl-SOF Sofia
12h 10m1 stop Istanbul
$736Turkish Airlines
Fri, Nov 20 - Sun, Nov 29
Turkish Airlines Logo
11:40 am - 6:05 pmSOF  Sofia-BOS Boston Logan Intl
13h 25m1 stop Istanbul
Turkish Airlines Logo
8:00 pm - 3:10 pmBOS  Boston Logan Intl-SOF Sofia
12h 10m1 stop Istanbul
$797Turkish Airlines
Thu, Nov 19 - Wed, Dec 2
Lufthansa Logo
6:25 am - 1:45 pmSOF  Sofia-BOS Boston Logan Intl
14h 20m1 stop Frankfurt am Main
Lufthansa Logo
8:40 pm - 10:55 pmBOS  Boston Logan Intl-SOF Sofia
19h 15m1 stop Munich Franz Josef Strauss
$798Lufthansa
Sat, Apr 17 - Wed, Apr 28
Lufthansa Logo
6:20 am - 3:40 pmSOF  Sofia-BOS Boston Logan Intl
16h 20m1 stop Frankfurt am Main
Lufthansa Logo
8:05 pm - 11:05 pmBOS  Boston Logan Intl-SOF Sofia
20h 00m1 stop Munich Franz Josef Strauss
$813Lufthansa
Mon, Nov 9 - Tue, Nov 24
United Airlines Logo
6:25 am - 1:45 pmSOF  Sofia-BOS Boston Logan Intl
14h 20m1 stop Frankfurt am Main
United Airlines Logo
12:00 pm - 1:15 pmBOS  Boston Logan Intl-SOF Sofia
18h 15m2 stops Newark Munich Franz Josef Strauss
$815United Airlines
Mon, Nov 9 - Wed, Nov 25
United Airlines Logo
6:25 am - 1:45 pmSOF  Sofia-BOS Boston Logan Intl
14h 20m1 stop Frankfurt am Main
United Airlines Logo
11:55 am - 1:15 pmBOS  Boston Logan Intl-SOF Sofia
18h 20m2 stops Chicago O'Hare Intl Munich Franz Josef Strauss
$815United Airlines
Sun, Jan 10 - Sat, Feb 6
Austrian Airlines Logo
7:55 am - 1:30 pmSOF  Sofia-BOS Boston Logan Intl
12h 35m1 stop Vienna Intl
Austrian Airlines Logo
12:26 pm - 11:50 amBOS  Boston Logan Intl-SOF Sofia
16h 24m2 stops Newark Vienna Intl
$827Austrian Airlines
Wed, Dec 16 - Mon, Jan 25
Austrian Airlines Logo
7:55 am - 5:41 pmSOF  Sofia-BOS Boston Logan Intl
16h 46m2 stops Vienna Intl Newark
Austrian Airlines Logo
12:26 pm - 6:00 pmBOS  Boston Logan Intl-SOF Sofia
22h 34m2 stops Newark Vienna Intl
$853Austrian Airlines
Booking Insights

Price, demand and travel trends for Sofia to Boston flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights with more confidence.

What's the cheapest day of the week to fly from Sofia to Boston?

Based on deals KAYAK users found in the last 12 months, Wednesday is the cheapest day of the week to fly from Sofia to Boston. It’s 11% cheaper than the average day, while Saturday is the most expensive, with prices 23% higher.

What’s the cheapest month to fly from Sofia to Boston?

•January is the cheapest month to fly from Sofia to Boston at $693 round-trip.
•May ($961) and February ($852) are the most expensive months.
•The price difference between flying in the cheapest and most expensive months is 38% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

When are flights from Sofia to Boston the cheapest?

Flights from Sofia to Boston are cheapest 22 weeks before departure. Booking in this window typically costs about 10% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

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Key details for Sofia to Boston flights

Low season

February

Cheapest flight

$419
Beat the crowds with an average 72% drop in travelers.
The most popular month to fly with an average 37% increase in travelers.
One-way 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

Your Sofia to Boston flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines and booking tips.

  • What cabin classes can I book on flights from Sofia to Boston?

    Three cabin classes are available on flights from Sofia to Boston:

    • Economy Class
    • Premium Economy Class
    • Business Class

  • How long is a flight from Sofia to Boston?

    A nonstop flight from Sofia to Boston takes 00m, covering 4,521 miles.

  • Do I need a passport to fly from Sofia to Boston?

    Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

  • How much should I expect to pay for a Sofia to Boston flight?

    Round-trip flights from Sofia to Boston range from $718 to $897, with an average of $791 over the past 12 months. Anything below $718 counts as a good deal.

  • How expensive are last-minute Sofia to Boston flights?

    Last-minute fares on this route (booked within two weeks of departure) are 3% below the route average of $791. Booking late can sometimes save you money, but inventory is limited.

  • Have flight prices from Sofia to Boston changed much recently?

    Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $715 to $2,825. That means the highest observed fare was about 4x higher than the lowest one.

  • How are flight prices from Sofia to Boston looking right now?

    One-way fares from Sofia to Boston are currently lower than usual. Average one-way flight prices are about $463, which is 32% below the typical average for this route.

  • What car rental options are available at Boston Logan Intl Airport (BOS)?

    Boston Logan Intl Airport (BOS) hosts 5 major car rental companies, with daily rates averaging $77 for economy cars. Top options include:

    • Dollar
    • Hertz
    • Budget
    • Thrifty
    • Sixt

  • Which airports can I use when flying from Sofia to Boston?

    Flights from Sofia to Boston usually depart from Sofia (SOF) and arrive at Boston Logan Intl (BOS).

  • Which airports do connecting flights from Sofia to Boston pass through?

    One-stop flights from Sofia to Boston most commonly connect through:

    • Istanbul (IST) - 37% of one-stop connections
    • Amsterdam Schiphol (AMS) - 18% of one-stop connections
    • Vienna Intl (VIE) - 15% of one-stop connections
    • Frankfurt am Main (FRA) - 13% of one-stop connections

  • Can I save money by using flexible dates for flights from Sofia to Boston?

    Yes. Flexible dates can save you up to 28% on flights from Sofia to Boston. Wednesday is the cheapest departure day at $709 round-trip on average, while Saturday is the most expensive at $978, a difference of $269.

    KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • How much time can I save by choosing a different layover airport from Sofia to Boston?

    Flying via Vienna Intl (VIE) gives the shortest average 1-stop total travel time at 11h 56m, compared with 12h 42m via Amsterdam Schiphol (AMS) and 12h 53m via Frankfurt am Main (FRA).

  • What is the time difference between Sofia and Boston?

    Boston is 6 hours behind Sofia (Eastern Time vs Eastern European Time). Plan for the time shift when scheduling connections or first-day activities.

  • What popular places can I visit in Boston?

    Some of the most popular sights in Boston are TD Garden, Fenway Park and Boston Common. These are among the most viewed places in Boston on KAYAK.

Your guide to booking Sofia to Boston flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates are flexible, aim for a Wednesday departure and avoid flying on Saturday. On this route, Wednesday flights average $709, about $269 less than Saturday fares (28% savings) based on the last 12 months.
  • For the best chance at a low fare, aim to book around 22 weeks before you fly. On this route, that window historically saves about 10% versus last-minute pricing (KAYAK booking data, last 12 months).
  • If you can choose when to travel, plan your Sofia to Boston trip for January. Fares historically average $693 round-trip in that month - typically $268 less than the most expensive month, which is May (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to Boston Logan Intl Airport.

    • Hyatt Regency Boston Harbor
    • Hilton Garden Inn Boston Logan Airport
    • Hilton Boston Logan Airport

More options for your flight from Sofia to Boston

Complete your trip to Boston with a hotel stay or car rental

Car rentals in Boston
Hotels in Boston
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