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Cheap flights from Boston to Sofia from $273

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Boston to Sofia departing on 7/22. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Boston to Sofia

Cheap round-trip flights

 Logo
6:00 am - 10:05 amBOS-SOF
21h 05m2 stops
 Logo
6:00 am - 4:58 pmSOF-BOS
17h 58m2 stops
Tue, Oct 21 - Tue, Nov 4
 Logo
6:00 am - 1:10 pmBOS-SOF
24h 10m2 stops
 Logo
6:45 pm - 4:58 pmSOF-BOS
29h 13m2 stops
Wed, Nov 19 - Wed, Dec 3
Lufthansa Logo
8:05 pm - 6:40 pmBOS-SOF
15h 35m1 stop
Lufthansa Logo
1:55 pm - 6:35 pmSOF-BOS
11h 40m1 stop
$375Lufthansa
Find Deal
Wed, Oct 22 - Wed, Nov 5
SWISS Logo
5:05 pm - 12:30 pmBOS-SOF
12h 25m1 stop
SWISS Logo
1:15 pm - 7:55 pmSOF-BOS
13h 40m1 stop
$382SWISS
Find Deal
Mon, Sep 1 - Tue, Sep 30
Austrian Airlines Logo
5:10 pm - 11:55 pmBOS-SOF
23h 45m1 stop
Austrian Airlines Logo
12:35 pm - 2:05 pmSOF-BOS
32h 30m1 stop
$388Austrian Airlines
Find Deal
Mon, Oct 20 - Mon, Nov 3
United Airlines Logo
1:30 pm - 1:10 pmBOS-SOF
16h 40m2 stops
United Airlines Logo
7:55 am - 2:05 pmSOF-BOS
13h 10m1 stop
$395United Airlines
Find Deal
Tue, Nov 18 - Tue, Dec 2
United Airlines Logo
8:05 pm - 11:00 pmBOS-SOF
19h 55m1 stop
United Airlines Logo
6:00 am - 11:57 pmSOF-BOS
24h 57m2 stops
$401United Airlines
Find Deal
Tue, Jul 22 - Wed, Aug 20
SWISS Logo
5:05 pm - 12:00 pmBOS-SOF
11h 55m2 stops
SWISS Logo
1:15 pm - 7:55 pmSOF-BOS
13h 40m1 stop
$403SWISS
Find Deal
Mon, Sep 1 - Tue, Sep 30
Lufthansa Logo
8:05 pm - 11:00 pmBOS-SOF
19h 55m1 stop
Lufthansa Logo
7:25 pm - 5:40 pmSOF-BOS
29h 15m1 stop
$412Lufthansa
Find Deal
Mon, Jul 28 - Tue, Aug 12
Austrian Airlines Logo
5:10 pm - 11:40 amBOS-SOF
11h 30m1 stop
Austrian Airlines Logo
8:00 am - 6:55 pmSOF-BOS
17h 55m2 stops
$492Austrian Airlines
Find Deal
Tue, Aug 26 - Sat, Sep 13

Lufthansa flights from Boston to Sofia

Our best Lufthansa deals on Boston to Sofia flight tickets
Lufthansa
Oct 22
BOS8:05 pmBoston Logan Intl
15h 35m
1 stop
SOF6:40 pmSofia
Nov 5
SOF1:55 pmSofia
11h 40m
1 stop
BOS6:35 pmBoston Logan Intl
Lufthansa
Jul 28
BOS8:05 pmBoston Logan Intl
19h 55m
1 stop
SOF11:00 pmSofia
Aug 12
SOF7:25 pmSofia
29h 15m
1 stop
BOS5:40 pmBoston Logan Intl
Lufthansa
Aug 27
BOS8:05 pmBoston Logan Intl
15h 35m
1 stop
SOF6:40 pmSofia
Sep 16
SOF12:45 pmSofia
11h 55m
1 stop
BOS5:40 pmBoston Logan Intl

SWISS flights from Boston to Sofia

Our best SWISS deals on Boston to Sofia flight tickets
SWISS
Sep 1
BOS5:05 pmBoston Logan Intl
12h 25m
1 stop
SOF12:30 pmSofia
Sep 30
SOF1:15 pmSofia
13h 40m
1 stop
BOS7:55 pmBoston Logan Intl
SWISS
Sep 1
BOS5:05 pmBoston Logan Intl
11h 55m
2 stops
SOF12:00 pmSofia
Sep 30
SOF1:15 pmSofia
13h 40m
1 stop
BOS7:55 pmBoston Logan Intl
SWISS
Aug 26
BOS9:40 pmBoston Logan Intl
29h 25m
1 stop
SOF10:05 amSofia
Sep 15
SOF3:30 pmSofia
30h 55m
1 stop
BOS3:25 pmBoston Logan Intl

See travel insights to Sofia from

How to get the cheapest flight ticket from Boston to Sofia

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Sofia?

The cheapest month to fly to Sofia from Boston is in October. Flight prices, which tend to average around $574, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of October, then book flights to Sofia from Boston during November instead. Flights to Sofia in November, while not as cheap as those in October, still average around $666.

What is the cheapest day to depart on your flight to Sofia?

According to our data, Tuesday is the cheapest day to fly to Sofia from Boston. The lowest ticket price found for a Tuesday departure recently was $843. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Flights from Boston to Sofia on a Friday will generally be more expensive and average around $997. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Sofia?

In the evening is the cheapest time of day to fly from Boston to Sofia when you can find flight prices for as low as $816. Flying to Sofia in the evening is an ideal time because this is during off-peak travel hours. In the morning is when there is more demand to fly to Sofia, so prices are often more expensive at around $1,022 per ticket.

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

You are more likely to see cheaper flights to Sofia from Boston when booking weeks ahead of your departure date. In general, you can expect to find flights to Sofia for around $844 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Sofia from Boston for as low as $653 on momondo.

How have Boston to Sofia flight prices changed over time?

As of June 2025, prices for Boston to Sofia flights are approximately 41% cheaper when compared to flights at the same time last year.

When to book flights from Boston to Sofia

Are you open to changing your travel dates? Check out the ideal times to fly from Boston to Sofia according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Boston to Sofia (BOS to SOF) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Boston to Sofia

Best Price Found

$273

Fastest flight time

11h 30m

Direct flights

None

Airports in Sofia

1 airport
The best one-way flight to Sofia from Boston in the past 72 hours is $273. The best round-trip flight deal from Boston to Sofia found on momondo in the last 72 hours is $364.
The fastest flight from Boston to Sofia takes 11h 30m
There are no direct flights from Boston to Sofia. Popular non-direct route for this connection is Boston Logan Intl Airport - Sofia Airport.
There is 1 airport near Sofia: Sofia (SOF)

  • How far is Boston Logan Intl to Sofia by plane?

    Boston Logan Intl and Sofia are 4519.3 mi apart from one another. In terms of flight time, this usually takes a little over 11h 30m.

  • When did momondo last update prices for flights from Boston Logan Intl Airport to Sofia Airport?

    Prices for flights from Boston Logan Intl Airport to Sofia Airport were last updated today.

  • How many operators does momondo search for flights from Boston Logan Intl Airport to Sofia Airport?

  • How old do you have to be to fly from Boston Logan Intl Airport to Sofia Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Boston Logan Intl Airport to Sofia Airport.

  • What documentation or ID do you need to fly to Sofia Airport?

    The travel and health documents you'll need for your trip to Sofia Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Sofia Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Boston to Sofia?


Best airlines flying from Boston to Sofia

Compare and see reviews for airlines that fly from Boston to Sofia with momondo
Airline
Rating
Free Cancellation
Price
Air FrancePriceFrom $416Free CancellationRating
7.5
1,470 reviews
Search Air France flights
KLMPriceFrom $457Free CancellationRating
7.8
1,365 reviews
Search KLM flights
British AirwaysPriceFrom $510Free CancellationRating
6.6
7,056 reviews
Search British Airways flights
Turkish AirlinesPriceFrom $511Free CancellationRating
7.3
3,867 reviews
Search Turkish Airlines flights
SWISSPriceFrom $554Free CancellationRating
7.5
1,645 reviews
Search SWISS flights
United AirlinesPriceFrom $608Free CancellationRating
7.4
8,831 reviews
Search United Airlines flights
Austrian AirlinesPriceFrom $637Free CancellationRating
7.6
805 reviews
Search Austrian Airlines flights
LufthansaPriceFrom $646Free CancellationRating
6.8
7,182 reviews
Search Lufthansa flights

Traveling to a place near Sofia?

Book flights to Sofia if you plan to visit one of these locations
Bansko
Borovets
Velingrad
Sandanski

Why use momondo?

Why should I use momondo to find a flight deal from Boston to Sofia?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Boston to Sofia. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Boston to Sofia with flexible booking policies on momondo?

Flights from Boston to Sofia with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Boston to Sofia?

Once you have performed a search for Boston to Sofia flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Boston to Sofia right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Sofia from Boston. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.


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