What is the cheapest airline that flies from United States to Sofia?

British Airways, SWISS, and United Airlines are the most popular carriers operating from United States to Sofia

How long does it take to fly to Sofia?

Flight times vary depending on what airport in United States you fly out of and what airport in Sofia you fly into. For example, flying from Boston to Sofia takes 10h on average. On the other hand, flying from New York to Sofia takes 10h 35m on average. Keep in mind that it’s always quicker to opt for a non-stop flight, so be sure to check momondo if there are any available for your route.

What airlines fly to Sofia?

Lufthansa, Turkish Airlines and United Airlines are the top three most popular airlines that fly to Sofia from United States according to our data. Lufthansa is the first choice among our users, with 40% of people opting to fly with this airline when traveling to Sofia. Keep in mind that there are 12 different airlines that fly to Sofia on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from United States to Sofia Airport?

Prices for flights from United States to Sofia Airport are refreshed on a daily basis.

How many operators does momondo search for flights from United States to Sofia Airport?

As of May 2026, there are 12 operators available to choose from for flights from United States to Sofia Airport.

How old do you have to be to fly from United States to Sofia Airport?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from United States to Sofia Airport.

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

The necessary travel and health documents for your Sofia Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$259 Cheap Flights from the United States to Sofia in 2026

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Find the cheapest flights from the United States to Sofia

Round-trip

One-way

Last minute

Recent round-trip flight deals from the United States to Sofia

Enter your travel dates to find the best prices.

8:00 am - 12:10 pm

SEA

SOF

18h 10m

2 stops

6:10 am - 10:42 pm

SOF

SEA

26h 32m

2 stops

$522Air Canada

Wed, Oct 7 - Tue, Oct 20

2:10 pm - 6:05 pm

SEA

SOF

17h 55m

1 stop

7:25 pm - 4:59 pm

SOF

SEA

31h 34m

1 stop

$539Lufthansa

Wed, Sep 2 - Mon, Sep 28

2:10 pm - 6:05 pm

SEA

SOF

17h 55m

1 stop

6:10 am - 11:55 am

SOF

SEA

15h 45m

2 stops

$610Lufthansa

Wed, Sep 2 - Mon, Sep 28

8:10 am - 6:20 pm

SEA

SOF

24h 10m

2 stops

8:00 am - 6:52 pm

SOF

SEA

20h 52m

2 stops

$614Austrian Airlines

Thu, Sep 10 - Thu, Sep 24

10:20 pm - 6:00 pm

JFK

SOF

12h 40m

1 stop

6:35 pm - 8:35 pm

SOF

JFK

33h 00m

1 stop

$636LOT

Tue, Oct 20 - Tue, Nov 3

6:10 pm - 11:50 am

JFK

SOF

10h 40m

1 stop

7:55 am - 2:15 pm

SOF

JFK

13h 20m

1 stop

$640Austrian Airlines

Tue, Nov 3 - Tue, Nov 17

2:32 pm - 1:25 pm

LGA

SOF

15h 53m

2 stops

6:25 am - 2:42 pm

SOF

LGA

15h 17m

2 stops

$694United Airlines

Mon, Nov 9 - Thu, Nov 19

2:30 pm - 12:10 pm

LGA

SOF

14h 40m

2 stops

8:00 am - 6:25 pm

SOF

LGA

17h 25m

2 stops

$702United Airlines

Tue, Aug 18 - Thu, Sep 10

1:27 pm - 2:00 pm

MDW

SOF

16h 33m

2 stops

7:00 am - 4:27 pm

SOF

MDW

17h 27m

2 stops

$877KLM

Sun, Aug 9 - Mon, Aug 31

1:27 pm - 2:00 pm

MDW

SOF

16h 33m

2 stops

7:00 am - 6:01 pm

SOF

MDW

19h 01m

2 stops

$897KLM

Sat, Aug 8 - Mon, Aug 24

Air Canada flights from United States to Sofia

Our best Air Canada deals on United States to Sofia flight tickets

Air Canada

Oct 7

SEA8:00 amSeattle/Tacoma Intl

18h 10m

2 stops

SOF12:10 pmSofia

Oct 20

SOF6:10 amSofia

26h 32m

2 stops

SEA10:42 pmSeattle/Tacoma Intl

$522

Air Canada

Oct 13

LGA11:35 amNew York LaGuardia

17h 35m

2 stops

SOF12:10 pmSofia

Nov 11

SOF2:00 pmSofia

14h 32m

2 stops

LGA9:32 pmNew York LaGuardia

$667

Air Canada

Oct 12

LGA3:30 pmNew York LaGuardia

20h 10m

2 stops

SOF6:40 pmSofia

Nov 12

SOF6:25 amSofia

22h 07m

2 stops

LGA9:32 pmNew York LaGuardia

$671

Air France flights from United States to Sofia

Our best Air France deals on United States to Sofia flight tickets

Air France

Jul 28

JFK4:30 pmNew York John F Kennedy Intl

14h 30m

1 stop

SOF2:00 pmSofia

Aug 13

SOF7:00 amSofia

18h 45m

1 stop

JFK6:45 pmNew York John F Kennedy Intl

$687

Air France

Jul 21

ORD5:10 pmChicago O'Hare Intl

12h 50m

1 stop

SOF2:00 pmSofia

Aug 13

SOF7:00 amSofia

19h 19m

2 stops

ORD6:19 pmChicago O'Hare Intl

$906

Air France

Jun 1

BOS1:29 pmBoston Logan Intl

17h 31m

2 stops

SOF2:00 pmSofia

Jun 11

SOF7:00 amSofia

13h 37m

1 stop

BOS1:37 pmBoston Logan Intl

$975

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Wed 10/7

8:00 am-12:10 pm

2 stops18h 10m

Sofia

Tue 10/20

6:10 am-10:42 pm

2 stops26h 32m

$522

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Wed 9/2

2:10 pm-6:05 pm

1 stop17h 55m

Sofia

Mon 9/28

7:25 pm-4:59 pm

1 stop31h 34m

$539

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Wed 9/2

2:10 pm-6:05 pm

1 stop17h 55m

Sofia

Mon 9/28

6:10 am-11:55 am

2 stops15h 45m

$610

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Thu 9/10

8:10 am-6:20 pm

2 stops24h 10m

Sofia

Thu 9/24

8:00 am-6:52 pm

2 stops20h 52m

$614

New YorkSofia

JFK - SOF

JFKSOF

New York John F Kennedy Intl

Tue 10/20

10:20 pm-6:00 pm

1 stop12h 40m

Sofia

Tue 11/3

6:35 pm-8:35 pm

1 stop33h 00m

$636

Quickest round-trip

New YorkSofia

JFK - SOF

JFKSOF

New York John F Kennedy Intl

Tue 11/3

6:10 pm-11:50 am

1 stop10h 40m

Sofia

Tue 11/17

7:55 am-2:15 pm

1 stop13h 20m

$640

New YorkSofia

LGA - SOF

LGASOF

New York LaGuardia

Mon 11/9

2:32 pm-1:25 pm

2 stops15h 53m

Sofia

Thu 11/19

6:25 am-2:42 pm

2 stops15h 17m

$694

New YorkSofia

LGA - SOF

LGASOF

New York LaGuardia

Tue 8/18

2:30 pm-12:10 pm

2 stops14h 40m

Sofia

Thu 9/10

8:00 am-6:25 pm

2 stops17h 25m

$702

ChicagoSofia

MDW - SOF

MDWSOF

Chicago Midway

Sun 8/9

1:27 pm-2:00 pm

2 stops16h 33m

Sofia

Mon 8/31

7:00 am-4:27 pm

2 stops17h 27m

$877

ChicagoSofia

MDW - SOF

MDWSOF

Chicago Midway

Sat 8/8

1:27 pm-2:00 pm

2 stops16h 33m

Sofia

Mon 8/24

7:00 am-6:01 pm

2 stops19h 01m

$897

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from United States 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

Prices

Airlines

Other information

What is the cheapest month to fly to Sofia?

The cheapest month to fly to Sofia from United States is in April. Flight prices, which tend to average around $667, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of April, then book flights to Sofia from United States during August instead. Flights to Sofia in August, while not as cheap as those in April, still average around $675.

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

You are more likely to see cheaper flights to Sofia from United States when booking weeks ahead of your departure date. In general, you can expect to find flights to Sofia for around $671 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Sofia from United States for as low as $588 on momondo.

Can stopping save me money on United States to Sofia flights?

You could potentially save up to 37% on your flight if you consider stops on a United States to Sofia flight.

Cheap United States to Sofia flight deals and tips

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

Fastest flight time	10h 00m
Direct flights	None

The fastest flight from United States to Sofia takes 10h 00m

There are no direct flights from United States to Sofia. There are no popular flight routes from United States to Sofia.

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Frequently asked questions about flying from the United States to Sofia

When did momondo last update prices for flights from United States to Sofia Airport?
Prices for flights from United States to Sofia Airport are refreshed on a daily basis.
How many operators does momondo search for flights from United States to Sofia Airport?
As of May 2026, there are 12 operators available to choose from for flights from United States to Sofia Airport.
How old do you have to be to fly from United States to Sofia Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from United States to Sofia Airport.
What documentation or ID do you need to fly to Sofia Airport?
The necessary travel and health documents for your Sofia Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Best airlines flying from United States to Sofia

Compare and see reviews for airlines that fly from United States to Sofia with momondo

Airline	Rating	Free Cancellation	Price
Austrian Airlines	PriceFrom $387	Free Cancellation	Rating 7.6 921 reviews	Search Austrian Airlines flights
Air France	PriceFrom $396	Free Cancellation	Rating 7.4 1,591 reviews	Search Air France flights
KLM	PriceFrom $403	Free Cancellation	Rating 7.8 1,522 reviews	Search KLM flights
United Airlines	PriceFrom $405	Free Cancellation	Rating 7.4 9,749 reviews	Search United Airlines flights
British Airways	PriceFrom $406	Free Cancellation	Rating 6.7 8,004 reviews	Search British Airways flights
SWISS	PriceFrom $410	Free Cancellation	Rating 7.5 1,955 reviews	Search SWISS flights
LOT	PriceFrom $413	Free Cancellation	Rating 7.5 1,195 reviews	Search LOT flights
Lufthansa	PriceFrom $415	Free Cancellation	Rating 6.8 8,024 reviews	Search Lufthansa flights
JetBlue	PriceFrom $478	Free Cancellation	Rating 7.2 2,981 reviews	Search JetBlue flights
ITA Airways	PriceFrom $505	Free Cancellation	Rating 6.7 1,225 reviews	Search ITA Airways flights

Bansko

Borovets

Velingrad

Sandanski

Why use momondo?

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

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

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

Yes. All flights to Sofia from United States on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from United States to Sofia?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Sofia from United States.

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

Yes momondo offers price alerts on flights to Sofia from United States. 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.