Sofia

$222+ Cheap flights from the United States to Sofia (SOF)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/14. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — SOF
ago. 26 — sep. 21
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Cheap flight deals from USA to Sofia

Keep the following information in mind while searching for USA to Sofia flight deals. Data was last updated agosto 21, 2025.

Round-trip from

$440
(CheapOair)

One-way from

$222
(Kiwi.com)

Popular in

December

Cheapest in

November

Average price

$686
From USA to Sofia
One-way flight from USA to Sofia
Highest demand for flights based on searches. 4% potential increase in price ($37 potential increase over avg. RT price).
Cheapest flight prices on average. 3% potential price decrease ($28 potential savings vs. average RT price).
Average for round-trip flights in August 2025

Find flight deals from USA to Sofia

Cheapest flights from USA to Sofia
Explore the most affordable flight options available from USA to Sofia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on agosto 21, 2025.

This CheapOair deal was found by Cheapflights users on 8/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 8/316:40 pmBOS - SOF
2 stops35h 20mMultiple Airlines
mar. 9/306:00 amSOF - BOS
1 stop18h 40mMultiple Airlines
Deal found 8/21$440
This CheapOair deal was found by Cheapflights users on 8/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 10/256:28 pmBOS - SOF
2 stops39h 52mBritish Airways
lun. 11/35:25 pmSOF - BOS
1 stop27h 55mBritish Airways
Deal found 8/21$443
This FlightHub deal was found by Cheapflights users on 8/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/15:30 amBOS - SOF
2 stops29h 50mMultiple Airlines
sáb. 2/287:05 pmSOF - BOS
1 stop30h 30mMultiple Airlines
Deal found 8/21$444
This United Airlines deal was found by Cheapflights users on 8/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 9/85:05 pmBOS - SOF
2 stops11h 55mUnited Airlines
vie. 9/196:15 amSOF - BOS
1 stop20h 55mUnited Airlines
Deal found 8/21$445
This Mytrip deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/49:50 pmEWR - SOF
1 stop29h 15mMultiple Airlines
mié. 9/106:15 amSOF - EWR
2 stops15h 28mMultiple Airlines
Deal found 8/20$446
This CheapOair deal was found by Cheapflights users on 8/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 9/812:15 pmBOS - SOF
2 stops16h 00mAir Canada
vie. 9/196:00 amSOF - BOS
2 stops34h 30mAir Canada
Deal found 8/21$447
This KLM deal was found by Cheapflights users on 8/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/23:40 pmEWR - SOF
2 stops15h 20mMultiple Airlines
mar. 9/237:00 amSOF - EWR
2 stops19h 00mMultiple Airlines
Deal found 8/21$448
This United Airlines deal was found by Cheapflights users on 8/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 11/227:55 pmBOS - SOF
2 stops43h 50mUnited Airlines
sáb. 12/66:05 amSOF - BOS
1 stop19h 30mUnited Airlines
Deal found 8/21$449
This Air Canada deal was found by Cheapflights users on 8/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 11/310:25 amEWR - SOF
2 stops24h 55mAir Canada
lun. 12/86:10 amSOF - EWR
2 stops15h 37mAir Canada
Deal found 8/21$450
This Kiwi.com deal was found by Cheapflights users on 8/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/95:40 pmEWR - SOF
1 stop11h 00mAustrian Airlines
lun. 10/1312:25 pmSOF - EWR
1 stop32h 30mAustrian Airlines
Deal found 8/21$451
This United Airlines deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/910:40 amBOS - SOF
2 stops18h 20mUnited Airlines
vie. 9/266:15 amSOF - BOS
2 stops16h 10mUnited Airlines
Deal found 8/20$452
This oojo deal was found by Cheapflights users on 8/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 11/305:55 pmEWR - SOF
1 stop17h 05mAustrian Airlines
sáb. 12/612:35 pmSOF - EWR
1 stop32h 20mAustrian Airlines
Deal found 8/21$452

Cheapflights Fare Finder

 
Customize your flight search to find flights from USA to Sofia that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated agosto 21, 2025.
Use the filters below to find and compare flights from the United States to Sofia that are best for you.

Fly from

USA

Fly to

Sofia

Route

Depart

Return

Price

BostonSofia

BOS - SOF

BOSSOF

Boston Logan Intl

lun. 9/1

10:20 am-1:00 pm

2 stops19h 40m

Sofia

mar. 9/16

6:00 am-9:25 pm

2 stops22h 25m

$440

BostonSofia

BOS - SOF

BOSSOF

Boston Logan Intl

dom. 8/31

6:40 pm-1:00 pm

2 stops35h 20m

Sofia

mar. 9/30

6:55 pm-1:50 pm

1 stop25h 55m

$440

BostonSofia

BOS - SOF

BOSSOF

Boston Logan Intl

dom. 8/31

8:05 pm-6:40 pm

1 stop15h 35m

Sofia

mar. 9/30

12:45 pm-5:40 pm

1 stop11h 55m

$441

BostonSofia

BOS - SOF

BOSSOF

Boston Logan Intl

mié. 9/10

6:00 am-1:15 pm

2 stops24h 15m

Sofia

mié. 9/17

6:00 am-9:30 am

2 stops34h 30m

$441

BostonSofia

BOS - SOF

BOSSOF

Boston Logan Intl

sáb. 10/25

6:28 pm-5:20 pm

2 stops39h 52m

Sofia

lun. 11/3

5:25 pm-2:20 pm

1 stop27h 55m

$443

BostonSofia

BOS - SOF

BOSSOF

Boston Logan Intl

sáb. 10/25

6:30 pm-7:00 pm

2 stops41h 30m

Sofia

lun. 11/3

2:20 pm-7:12 pm

2 stops35h 52m

$443

BostonSofia

BOS - SOF

BOSSOF

Boston Logan Intl

lun. 12/1

5:30 am-6:20 pm

2 stops29h 50m

Sofia

sáb. 2/28

7:05 pm-6:35 pm

1 stop30h 30m

$444

BostonSofia

BOS - SOF

BOSSOF

Boston Logan Intl

mié. 10/1

5:20 pm-2:00 pm

1 stop13h 40m

Sofia

jue. 10/9

7:00 am-1:40 pm

1 stop13h 40m

$445

NewarkSofia

EWR - SOF

EWRSOF

Newark

sáb. 1/31

8:50 pm-6:20 pm

1 stop14h 30m

Sofia

mar. 2/10

2:00 pm-7:05 pm

1 stop12h 05m

$445

BostonSofia

BOS - SOF

BOSSOF

Boston Logan Intl

dom. 1/18

8:40 pm-6:20 pm

1 stop14h 40m

Sofia

dom. 2/1

7:05 pm-6:35 pm

1 stop30h 30m

$445

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/21

Showing 1-10 of 60 results
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The best insider tips for theUnited States to Sofia flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your theUnited States to Sofia trip
Airlines
Turkish Airlines

Turkish Airlines Economy offers a travel set with sleep mask, ear plugs, and toiletries on flights over five hours.


Turkish Airlines Business Class features lie-flat seats, Ferragamo travel sets, and Denon noise-canceling headphones.

United Airlines

United's Polaris Business Class offers lie-flat seats, Saks Fifth Avenue bedding, and upscale amenity kits.


United's Premium Plus offers extra legroom, upgraded meals, and two checked bags on international routes.

Our travel experts
Jessica Macdonald

Jessica Macdonald

Expert on Turkish Airlines

Jessica Macdonald

Jessica Macdonald

Currently based in Scotland after living in South Africa and the United States, Jessica has been writing travel and aviation content for more than 10 years. She regularly contributes to Travel + Leisure and TripSavvy, and has had work published by Condé Nast Traveller and The Independent. She has traveled to more than 50 countries across six continents.

Read more
Harriet Baskas

Harriet Baskas

Expert on United Airlines

Harriet Baskas

Harriet Baskas

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Read more

Best time to book a flight from USA to Sofia

Have a flexible travel schedule? Discover the best time to fly to Sofia from USA with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from the United States to Sofia

What is the cheapest month to book a flight from USA to Sofia?

Currently, November is the cheapest month in which you can book a flight from USA to Sofia (average of $632). Flying from USA to Sofia in June is currently the most expensive (average of $1,185). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from US to SOF?

Find hourly flight availability from USA to Sofia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated agosto 21, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from USA to Sofia as you normally would.

Reviews of airlines servicing Sofia

Get insights into the airlines that provide service to Sofia. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Sofia. Reviews last updated agosto 21, 2025.
Peruse reviews from past customers who have flown with KLM, LOT, and United Airlines from the United States to Sofia to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Overall

7.8

Boarding

7.8

Crew

8.4

Food

7.3

Entertainment

7.1

Comfort

7.7

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

Overall

7.8

Boarding

7.8

Crew

8.4

Food

7.3

Entertainment

7.1

Comfort

7.7

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

Overall

7.8

Boarding

7.8

Crew

8.4

Food

7.3

Entertainment

7.1

Comfort

7.7

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

Overall

7.8

Boarding

7.8

Crew

8.4

Food

7.3

Entertainment

7.1

Comfort

7.7

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

Overall

7.8

Boarding

7.8

Crew

8.4

Food

7.3

Entertainment

7.1

Comfort

7.7

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

Overall

7.8

Boarding

7.8

Crew

8.4

Food

7.3

Entertainment

7.1

Comfort

7.7

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

Related info for your journey

Find useful and relevant information for your journey from USA to Sofia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
  • What airport do you fly into for flights to Sofia from United States?

    Located just 4.2 mi from the city center, Sofia (SOF) is the airport most travelers will use when flying to Sofia from United States.

  • How long is the flight from USA to Sofia?

    For as low as $445, Air Canada can have you in Sofia from USA in 14h 30m. Airlines will cover a distance of 4721 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from USA to Sofia one-way?

    The cheapest airline one-way is Air Serbia, with whom users have recently found tickets for as low as $311. However, be on the lookout for offers from Air Canada and ITA Airways, as they are both options that can get you from USA to Sofia for a low price.

  • What are the most popular routes from USA to Sofia?

  • Can I find deals for flights from USA to Sofia that include hotel bookings?

    Yes. In addition to deals on USA to Sofia flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from USA to Sofia?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from USA to Sofia.

  • Can I find deals for business class flights from USA to Sofia?

    Yes. Cheapflights offers flight deals from USA to Sofia by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from USA to Sofia?

    Currently, November is the cheapest month in which you can book a flight from USA to Sofia (average of $632). Flying from USA to Sofia in June is currently the most expensive (average of $1,185). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 10 airlines flying from USA to Sofia

Discover the top 10 airlines that operate flights from USA to Sofia. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated agosto 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
SWISSCheapest$401Average$867FlexibilityNo cancel feeOn-time79%
Air FranceCheapest$416Average$777FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$428Average$874FlexibilityNo cancel feeOn-time69%
KLMCheapest$432Average$843FlexibilityNo cancel feeOn-time75%
LOTCheapest$437Average$875FlexibilityNo cancel feeOn-time81%
Austrian AirlinesCheapest$496Average$886FlexibilityNo cancel feeOn-time78%
Turkish AirlinesCheapest$503Average$722FlexibilityNo cancel feeOn-time77%
ITA AirwaysCheapest$505Average$1,072FlexibilityNo cancel feeOn-time81%
British AirwaysCheapest$510Average$823FlexibilityNo cancel feeOn-time70%
LufthansaCheapest$542Average$946FlexibilityNo cancel feeOn-time76%

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