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$643+ Cheap flights from Boise (BOI) to Sofia (SOF)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/27. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SOF
Dec 5 — Dec 121
Fri 12/5
Fri 12/12
1 adult, Economy
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Cheap flight deals from Boise to Sofia

Discover tips and strategies to find the most affordable flight options for your journey from Boise (BOI) to Sofia (SOF). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated November 5, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$643
(United Airlines)

Popular in

March

Cheapest in

September

Average price

$926
Provider with most accurate pricing for Boise Air Term. Gowen Fld-Sofia flight deals.
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Provider most trusted by Cheapflights users for Boise Air Term. Gowen Fld-Sofia flights.
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From Boise Air Term. Gowen Fld to Sofia
Search Deals
Highest demand for flights based on searches. 59% potential increase in price ($2,081 potential increase over avg. RT price).
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Cheapest flight prices on average. 59% potential price decrease ($537 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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Find flight deals from Boise to Sofia

Best flights from Boise to Sofia
Discover carefully curated flight deals from Boise to Sofia that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated November 5, 2025.

This United Airlines deal was found by Cheapflights users on 11/3. 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.
Fri 3/2710:40 amBOI - SOF
2 stops28h 05mUnited Airlines
Tue 3/316:10 amSOF - BOI
2 stops25h 56mUnited Airlines
Deal found 11/3$643

Cheapflights Fare Finder

 
Customize your flight search to find flights from Boise 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 November 5, 2025.
Use the filters below to find and compare flights from Boise to Sofia that are best for you.

Fly from

Boise

Fly to

Sofia

Route

Depart

Return

Price

BoiseSofia

BOI - SOF

BOISOF

Boise Air Term. Gowen Fld

Fri 3/27

10:40 am-10:45 pm

2 stops28h 05m

Sofia

Tue 3/31

6:10 am-11:06 pm

2 stops25h 56m

$643

BoiseSofia

BOI - SOF

BOISOF

Boise Air Term. Gowen Fld

Sat 11/15

2:20 pm-10:45 pm

2 stops23h 25m

$3,378

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/4

Compare providers for flights from Boise to Sofia

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Boise to Sofia in November.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Boise-Sofia flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Boise-Sofia flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Boise-Sofia flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Boise-Sofia flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Boise-Sofia flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Boise to Sofia

Have a flexible travel schedule? Discover the best time to fly to Sofia from Boise 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.

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 November 5, 2025.
Get a feel of what it's like to fly with United Airlines from Boise to Sofia by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,002 reviews

Boarding

7.7

Food

6.6

Comfort

7.3

Entertainment

7.1

Overall

7.4

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
United Airlines
7.4
Good
9,002 reviews
United Airlines
7.4
Good
9,002 reviews

Boarding

7.7

Food

6.6

Comfort

7.3

Entertainment

7.1

Overall

7.4

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000

Related info for your journey

Find useful and relevant information for your journey from Boise to Sofia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Boise to Sofia?

    A quick flight from Boise to Sofia can take about 28h 05m. United Airlines provides one of the quickest options available for as low as $643. The distance from Boise to Sofia is about 5970 mi.

  • What is the cheapest airline to fly from Boise to Sofia round-trip?

    United Airlines, at $645, was found to be the cheapest airline from Boise to Sofia.. This flight start at 55% lower than the current average price 3 months from now.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Boise 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.

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Top airline flying from Boise to Sofia

Discover the top airline that operate flights from Boise 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 November 5, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$645Average$966FlexibilityNo cancel feeOn-time69%

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