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Sofia

$369+ Cheap flights from Dulles Intl (IAD) 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 1/7. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SOF
Jan 27 — Feb 31
Tue 1/27
Tue 2/3
1 adult, Economy
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Cheap flight deals from Dulles Intl to Sofia

Cheapest flights from Dulles Intl to Sofia
Explore the most affordable flight options available from Dulles Intl to Sofia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 28, 2025.

This Expedia deal was found by Cheapflights users on 12/27. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/2710:20 pmIAD - SOF
2 stops32h 15mMultiple Airlines
Sun 1/186:45 pmSOF - IAD
2 stops50h 15mMultiple Airlines
Deal found 12/27$780
This United Airlines deal was found by Cheapflights users on 12/27. 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.
Sat 12/275:45 pmIAD - SOF
2 stops22h 00mUnited Airlines
Sun 1/182:00 pmSOF - IAD
1 stop32h 35mUnited Airlines
Deal found 12/27$785
This Booking.com deal was found by Cheapflights users on 12/27. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/2710:55 pmIAD - SOF
1 stop31h 05mLufthansa
Sun 1/182:25 pmSOF - IAD
1 stop32h 25mLufthansa
Deal found 12/27$915

Find flight deals from Dulles Intl to Sofia

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) 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 December 28, 2025.

Most accurate provider

Justfly.com
3 stars

Most trusted provider

Justfly.com
3 stars

Round-trip from

$530
(FlightHub)

One-way from

$369
(Kiwi.com)

Popular in

December

Cheapest in

October

Average price

$1,133
Provider with most accurate pricing for Washington, D.C. Dulles Intl-Sofia flight deals.
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Provider most trusted by Cheapflights users for Washington, D.C. Dulles Intl-Sofia flights.
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From Washington, D.C. Dulles Intl to Sofia
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One-way flight from Washington, D.C. Dulles Intl to Sofia
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High demand for flights, 2% potential price rise
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Cheapest flight prices on average. 3% potential price decrease ($26 potential savings vs. average RT price).
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Average for round-trip flights in December 2025
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Dulles Intl 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 December 28, 2025.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Sofia that are best for you.

Fly from

Dulles Intl

Fly to

Sofia

Route

Depart

Return

Price

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

Wed 4/29

10:25 pm-1:30 pm

1 stop32h 05m

Sofia

Wed 5/13

9:30 pm-5:25 pm

1 stop26h 55m

$525

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

Wed 4/29

6:10 pm-2:00 pm

1 stop12h 50m

Sofia

Wed 5/13

7:00 am-7:16 pm

2 stops19h 16m

$530

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

Thu 2/19

1:30 pm-3:10 pm

1 stop18h 40m

Sofia

Thu 3/5

9:35 am-7:20 pm

1 stop16h 45m

$530

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

Sun 3/1

9:15 pm-3:10 pm

1 stop34h 55m

Sofia

Fri 3/13

9:35 am-12:45 pm

1 stop33h 10m

$535

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

Wed 4/1

6:10 pm-2:00 pm

1 stop12h 50m

Sofia

Tue 4/14

7:00 am-3:35 pm

1 stop15h 35m

$550

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

Tue 3/31

5:40 pm-2:00 pm

1 stop13h 20m

Sofia

Tue 4/14

7:00 am-3:35 pm

1 stop15h 35m

$550

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

Sun 2/15

1:30 pm-3:10 pm

1 stop18h 40m

Sofia

Sun 3/1

9:40 pm-11:45 am

1 stop21h 05m

$574

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

Sun 3/29

10:20 pm-11:10 pm

1 stop17h 50m

Sofia

Fri 4/10

6:20 am-4:05 pm

1 stop16h 45m

$577

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

Mon 3/30

5:25 pm-12:10 pm

1 stop11h 45m

Sofia

Thu 4/16

6:30 am-3:05 pm

1 stop15h 35m

$577

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

Wed 4/1

5:25 pm-12:10 pm

1 stop11h 45m

Sofia

Thu 4/16

6:30 am-7:40 pm

2 stops20h 10m

$581

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/27

Showing 1-10 of 15 results
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Compare providers for flights from Dulles Intl 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 Dulles Intl to Sofia in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*2 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars
Justfly.comPrice Accuracy3 starsTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star

*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 Washington, D.C. Dulles Intl Airport-Sofia flights, users find the pricing of Justfly.com to be most consistent on Cheapflights vs. Justfly.com Users can find the same prices on Washington, D.C. Dulles Intl Airport-Sofia flight deals on Cheapflights vs. Justfly.com >95% of the time. Price accuracy is based on data collected from Washington, D.C. Dulles Intl Airport-Sofia flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-Sofia flights, Cheapflights users trust Justfly.com the most. Justfly.com 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 Washington, D.C. Dulles Intl Airport-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 Dulles Intl to Sofia

Have a flexible travel schedule? Discover the best time to fly to Sofia from Dulles Intl 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 Washington, D.C. Dulles Intl Airport to Sofia

How far ahead should I book a flight from Washington, D.C. Dulles Intl Airport to Sofia?

Use this chart to determine the optimal time to book a round-trip flight from Dulles Intl to Sofia. Price data was last updated on December 19, 2025.

Booking 14 days in advance of your planned departure date is, on average, the best time to get cheap flights from Washington, D.C. Dulles Intl Airport to Sofia. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Washington, D.C. Dulles Intl Airport to Sofia?

Currently, October is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Sofia (average of $551). Flying from Washington, D.C. Dulles Intl Airport to Sofia in June is currently the most expensive (average of $822). 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 IAD to SOF?

Find hourly flight availability from Dulles Intl 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 December 28, 2025.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 37% on flights from Washington, D.C. Dulles Intl Airport to Sofia by exploring options for tickets at noon.

How much does it cost to fly round-trip from Washington, D.C. Dulles Intl Airport to Sofia?

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 December 28, 2025.
See what other customers who have flown with Austrian Airlines, United Airlines, and Turkish Airlines from Washington, D.C. Dulles Intl Airport to Sofia have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Austrian Airlines
7.6
Good
884 reviews

Food

6.8

Overall

7.6

Boarding

7.6

Comfort

7.3

Crew

8.1

Entertainment

6.8

Reviews

1 / 20
2.0
Mediocre

Nate,Dec 2025

IAD - GSP

Again, I missed this flight because of the first leg of my journey being delayed by three hours. I hope the people on the flight had a nice flight.
Austrian Airlines
7.6
Good
884 reviews
Austrian Airlines
7.6
Good
884 reviews

Food

6.8

Overall

7.6

Boarding

7.6

Comfort

7.3

Crew

8.1

Entertainment

6.8

Reviews

1 / 20
2.0
Mediocre

Nate,Dec 2025

IAD - GSP

Again, I missed this flight because of the first leg of my journey being delayed by three hours. I hope the people on the flight had a nice flight.
United Airlines
7.4
Good
9,114 reviews
Austrian Airlines
7.6
Good
884 reviews

Food

6.8

Overall

7.6

Boarding

7.6

Comfort

7.3

Crew

8.1

Entertainment

6.8

Reviews

1 / 20
2.0
Mediocre

Nate,Dec 2025

IAD - GSP

Again, I missed this flight because of the first leg of my journey being delayed by three hours. I hope the people on the flight had a nice flight.
Turkish Airlines
7.3
Good
4,126 reviews
Austrian Airlines
7.6
Good
884 reviews

Food

6.8

Overall

7.6

Boarding

7.6

Comfort

7.3

Crew

8.1

Entertainment

6.8

Reviews

1 / 20
2.0
Mediocre

Nate,Dec 2025

IAD - GSP

Again, I missed this flight because of the first leg of my journey being delayed by three hours. I hope the people on the flight had a nice flight.
Lufthansa
6.8
Okay
7,659 reviews
Austrian Airlines
7.6
Good
884 reviews

Food

6.8

Overall

7.6

Boarding

7.6

Comfort

7.3

Crew

8.1

Entertainment

6.8

Reviews

1 / 20
2.0
Mediocre

Nate,Dec 2025

IAD - GSP

Again, I missed this flight because of the first leg of my journey being delayed by three hours. I hope the people on the flight had a nice flight.
ITA Airways
6.7
Okay
1,114 reviews
Austrian Airlines
7.6
Good
884 reviews

Food

6.8

Overall

7.6

Boarding

7.6

Comfort

7.3

Crew

8.1

Entertainment

6.8

Reviews

1 / 20
2.0
Mediocre

Nate,Dec 2025

IAD - GSP

Again, I missed this flight because of the first leg of my journey being delayed by three hours. I hope the people on the flight had a nice flight.

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl 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 Washington, D.C. Dulles Intl?

    Most people fly into Sofia (SOF) if they book a flight to Sofia from Washington, D.C. Dulles Intl. On average, Sofia has 0 inbound flights from Washington, D.C. Dulles Intl per day from 5 airlines. Sofia is conveniently located just 4.2 mi from Sofia’s city center.

  • How long is the flight from Washington, D.C. Dulles Intl Airport to Sofia?

    For as low as $530, British Airways can have you in Sofia from Washington, D.C. Dulles Intl Airport in 12h 50m. Washington, D.C. Dulles Intl Airport and Sofia are separated by a distance of 4931 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from Washington, D.C. Dulles Intl Airport to Sofia round-trip?

    Cheapflights users have booked flights from Washington, D.C. Dulles Intl Airport to Sofia round-trip from $530. Other airlines that can offer you cheap pricing are United Airlines, from $679, and Lufthansa, from $691. These flights start at 38% lower than the current average price 3 months from now.

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

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

  • How can I find direct flights from Dulles Intl to Sofia?

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

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

    Yes. Cheapflights offers flight deals from Dulles Intl 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 Washington, D.C. Dulles Intl Airport to Sofia?

    Currently, October is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Sofia (average of $551). Flying from Washington, D.C. Dulles Intl Airport to Sofia in June is currently the most expensive (average of $822). 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

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Alternative routes for Dulles Intl to Sofia

See prices for flight routes from nearby airports that may be better suited for you.
Reagan-National to Sofia flights
Baltimore to Sofia flights

Top 5 airlines flying from Dulles Intl to Sofia

Discover the top 5 airlines that operate flights from Dulles Intl 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 December 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapest$530Average$710FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$679Average$904FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$691Average$914FlexibilityNo cancel feeOn-time76%
Austrian AirlinesCheapest$731Average$1,148FlexibilityNo cancel feeOn-time78%
ITA AirwaysCheapest$768Average$1,241FlexibilityNo cancel feeOn-time81%

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