Sofia

$175+ 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 9/23. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — SOF
Oct 11 — Oct 181
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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 September 11, 2025.

Round-trip from

$349
(Kiwi.com)

One-way from

$175
(Kiwi.com)

Popular in

December

Cheapest in

November

Average price

$664
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 September 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 September 11, 2025.

This Kiwi.com deal was found by Cheapflights users on 9/9. 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.
Sun 10/195:05 pmBOS - SOF
1 stop14h 40mMultiple Airlines
Tue 11/47:55 amSOF - BOS
2 stops16h 20mMultiple Airlines
Deal found 9/9$349
This Kiwi.com deal was found by Cheapflights users on 9/9. 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.
Wed 10/225:10 pmBOS - SOF
1 stop11h 30mMultiple Airlines
Wed 11/52:00 pmSOF - BOS
1 stop11h 35mMultiple Airlines
Deal found 9/9$356
This Kiwi.com deal was found by Cheapflights users on 9/9. 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.
Tue 10/218:05 pmBOS - SOF
1 stop15h 35mLufthansa
Tue 11/42:00 pmSOF - BOS
1 stop11h 35mLufthansa
Deal found 9/9$358
This Kiwi.com deal was found by Cheapflights users on 9/9. 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.
Mon 12/81:38 pmBOS - SOF
2 stops15h 12mAustrian Airlines
Mon 12/226:45 pmSOF - BOS
1 stop26h 20mAustrian Airlines
Deal found 9/9$361
This Kiwi.com deal was found by Cheapflights users on 9/10. 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.
Tue 12/98:40 pmBOS - SOF
1 stop14h 40mLufthansa
Tue 12/232:00 pmSOF - BOS
1 stop11h 35mLufthansa
Deal found 9/10$362
This Air France deal was found by Cheapflights users on 9/9. 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 France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/205:20 pmBOS - SOF
1 stop13h 40mAir France
Tue 11/47:10 amSOF - BOS
1 stop16h 10mAir France
Deal found 9/9$366
This Ticket deal was found by Cheapflights users on 9/9. 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/248:05 pmBOS - SOF
1 stop15h 35mLufthansa
Fri 10/312:00 pmSOF - BOS
1 stop11h 35mLufthansa
Deal found 9/9$367
This British Airways deal was found by Cheapflights users on 9/10. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2810:35 pmBOS - SOF
1 stop15h 35mBritish Airways
Mon 11/105:25 pmSOF - BOS
1 stop27h 55mBritish Airways
Deal found 9/10$369
This Air France deal was found by Cheapflights users on 9/9. 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 France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/211:15 pmBOS - SOF
2 stops17h 45mAir France
Wed 11/57:00 amSOF - BOS
1 stop13h 40mAir France
Deal found 9/9$370
This Air France deal was found by Cheapflights users on 9/10. 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 France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/287:30 pmBOS - SOF
1 stop12h 25mAir France
Tue 11/117:10 amSOF - BOS
2 stops18h 46mAir France
Deal found 9/10$372
This Air France deal was found by Cheapflights users on 9/10. 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 France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/287:30 pmBOS - SOF
1 stop12h 25mMultiple Airlines
Thu 11/137:00 amSOF - BOS
2 stops16h 15mMultiple Airlines
Deal found 9/10$373
This Air France deal was found by Cheapflights users on 9/9. 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 France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/205:20 pmBOS - SOF
1 stop13h 40mMultiple Airlines
Tue 11/47:00 amSOF - BOS
2 stops16h 32mMultiple Airlines
Deal found 9/9$377

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 September 11, 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

Wed 2/11

7:10 pm-2:05 pm

1 stop11h 55m

Sofia

Wed 2/25

7:00 am-4:20 pm

1 stop16h 20m

$379

BostonSofia

BOS - SOF

BOSSOF

Boston Logan Intl

Tue 10/28

5:00 pm-2:05 pm

2 stops15h 05m

Sofia

Tue 11/11

7:10 am-6:56 pm

2 stops18h 46m

$385

BostonSofia

BOS - SOF

BOSSOF

Boston Logan Intl

Tue 10/21

8:05 pm-11:00 pm

1 stop19h 55m

Sofia

Fri 11/7

7:55 am-2:05 pm

1 stop13h 10m

$392

BostonSofia

BOS - SOF

BOSSOF

Boston Logan Intl

Mon 10/27

9:40 pm-10:45 pm

1 stop19h 05m

Sofia

Tue 11/11

7:55 am-2:05 pm

1 stop13h 10m

$392

BostonSofia

BOS - SOF

BOSSOF

Boston Logan Intl

Sun 10/26

9:40 pm-10:45 pm

1 stop19h 05m

Sofia

Tue 11/11

7:55 am-2:05 pm

1 stop13h 10m

$392

BostonSofia

BOS - SOF

BOSSOF

Boston Logan Intl

Tue 10/28

9:40 pm-6:20 pm

1 stop14h 40m

Sofia

Fri 11/14

7:55 am-2:05 pm

1 stop13h 10m

$392

BostonSofia

BOS - SOF

BOSSOF

Boston Logan Intl

Wed 10/29

9:40 pm-10:45 pm

1 stop19h 05m

Sofia

Fri 11/14

7:55 am-2:05 pm

1 stop13h 10m

$392

BostonSofia

BOS - SOF

BOSSOF

Boston Logan Intl

Sun 10/26

9:40 pm-6:20 pm

1 stop14h 40m

Sofia

Thu 11/13

6:05 am-6:35 pm

1 stop19h 30m

$393

BostonSofia

BOS - SOF

BOSSOF

Boston Logan Intl

Mon 10/27

9:40 pm-6:20 pm

1 stop14h 40m

Sofia

Wed 11/12

2:00 pm-6:35 pm

1 stop11h 35m

$393

New YorkSofia

JFK - SOF

JFKSOF

New York John F Kennedy Intl

Tue 12/30

6:10 pm-6:00 pm

1 stop16h 50m

Sofia

Sat 1/10

2:00 pm-4:09 pm

2 stops57h 09m

$441

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/9

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 September 11, 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 September 11, 2025.
Peruse reviews from past customers who have flown with LOT, Austrian Airlines, 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.

Food

7.2

Boarding

7.6

Overall

7.6

Entertainment

7.0

Crew

8.2

Comfort

7.5

Reviews

1 / 20
10.0
Excellent

Krzysztof,Sep 2025

ORD - KRK

It’s a professional person and flyer I love the LOT I will going to use this again

Food

7.2

Boarding

7.6

Overall

7.6

Entertainment

7.0

Crew

8.2

Comfort

7.5

Reviews

1 / 20
10.0
Excellent

Krzysztof,Sep 2025

ORD - KRK

It’s a professional person and flyer I love the LOT I will going to use this again

Food

7.2

Boarding

7.6

Overall

7.6

Entertainment

7.0

Crew

8.2

Comfort

7.5

Reviews

1 / 20
10.0
Excellent

Krzysztof,Sep 2025

ORD - KRK

It’s a professional person and flyer I love the LOT I will going to use this again

Food

7.2

Boarding

7.6

Overall

7.6

Entertainment

7.0

Crew

8.2

Comfort

7.5

Reviews

1 / 20
10.0
Excellent

Krzysztof,Sep 2025

ORD - KRK

It’s a professional person and flyer I love the LOT I will going to use this again

Food

7.2

Boarding

7.6

Overall

7.6

Entertainment

7.0

Crew

8.2

Comfort

7.5

Reviews

1 / 20
10.0
Excellent

Krzysztof,Sep 2025

ORD - KRK

It’s a professional person and flyer I love the LOT I will going to use this again

Food

7.2

Boarding

7.6

Overall

7.6

Entertainment

7.0

Crew

8.2

Comfort

7.5

Reviews

1 / 20
10.0
Excellent

Krzysztof,Sep 2025

ORD - KRK

It’s a professional person and flyer I love the LOT I will going to use this again

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 $522, United Airlines can have you in Sofia from USA in 15h 55m. Airlines will cover a distance of 5994 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 Canada, with whom users have recently found tickets for as low as $347. However, be on the lookout for offers from Air Serbia and Austrian Airlines, 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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
SWISSCheapest$401Average$857FlexibilityNo cancel feeOn-time79%
Air FranceCheapest$416Average$788FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$428Average$868FlexibilityNo cancel feeOn-time69%
KLMCheapest$432Average$841FlexibilityNo cancel feeOn-time75%
LOTCheapest$437Average$885FlexibilityNo cancel feeOn-time81%
Austrian AirlinesCheapest$471Average$876FlexibilityNo cancel feeOn-time78%
LufthansaCheapest$475Average$946FlexibilityNo cancel feeOn-time76%
Turkish AirlinesCheapest$503Average$721FlexibilityNo cancel feeOn-time77%
ITA AirwaysCheapest$505Average$1,072FlexibilityNo cancel feeOn-time81%
British AirwaysCheapest$510Average$827FlexibilityNo cancel feeOn-time70%

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