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$326+ 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 8/25. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SOF
May 18 — May 251
Mon 5/18
Mon 5/25
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 April 18, 2026.

This FlightHub deal was found by Cheapflights users on 4/15. 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.
Thu 8/271:20 pm
IAD
-
SOF
1 stop18h 40m
Turkish Airlines
Tue 9/299:05 pm
SOF
-
IAD
1 stop21h 30m
Turkish Airlines
Deal found 4/15$571
This Justfly.com deal was found by Cheapflights users on 4/14. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/49:45 pm
IAD
-
SOF
1 stop15h 30m
Turkish Airlines
Wed 9/93:50 pm
SOF
-
IAD
1 stop26h 45m
Turkish Airlines
Deal found 4/14$574
This FlightHub deal was found by Cheapflights users on 4/16. 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.
Wed 7/291:20 pm
IAD
-
SOF
1 stop23h 55m
Turkish Airlines
Wed 9/99:05 pm
SOF
-
IAD
1 stop21h 30m
Turkish Airlines
Deal found 4/16$575
This Booking.com deal was found by Cheapflights users on 4/18. 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.
Tue 9/81:20 pm
IAD
-
SOF
1 stop12h 25m
Turkish Airlines
Tue 9/229:05 pm
SOF
-
IAD
1 stop21h 30m
Turkish Airlines
Deal found 4/18$579
This Booking.com deal was found by Cheapflights users on 4/17. 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.
Wed 8/199:45 pm
IAD
-
SOF
1 stop15h 30m
Turkish Airlines
Wed 9/23:50 pm
SOF
-
IAD
1 stop26h 45m
Turkish Airlines
Deal found 4/17$580
This oojo deal was found by Cheapflights users on 4/17. 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.
Tue 9/151:20 pm
IAD
-
SOF
1 stop23h 55m
Turkish Airlines
Wed 9/239:35 am
SOF
-
IAD
1 stop33h 00m
Turkish Airlines
Deal found 4/17$581
This FlightHub deal was found by Cheapflights users on 4/15. 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.
Fri 10/161:20 pm
IAD
-
SOF
1 stop18h 40m
Turkish Airlines
Fri 10/309:40 pm
SOF
-
IAD
1 stop21h 05m
Turkish Airlines
Deal found 4/15$612
This FlightHub deal was found by Cheapflights users on 4/14. 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.
Tue 8/49:45 pm
IAD
-
SOF
1 stop15h 30m
Turkish Airlines
Tue 9/89:05 pm
SOF
-
IAD
1 stop21h 30m
Turkish Airlines
Deal found 4/14$614
This FlightHub deal was found by Cheapflights users on 4/14. 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.
Tue 9/151:20 pm
IAD
-
SOF
1 stop12h 25m
Turkish Airlines
Tue 9/299:35 am
SOF
-
IAD
1 stop33h 00m
Turkish Airlines
Deal found 4/14$621
This FlightHub deal was found by Cheapflights users on 4/15. 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.
Sun 9/139:45 pm
IAD
-
SOF
1 stop34h 15m
Turkish Airlines
Sun 9/279:35 am
SOF
-
IAD
1 stop33h 00m
Turkish Airlines
Deal found 4/15$630
This FlightHub deal was found by Cheapflights users on 4/17. 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.
Sun 10/189:45 pm
IAD
-
SOF
1 stop28h 00m
Turkish Airlines
Sun 11/14:00 pm
SOF
-
IAD
1 stop27h 45m
Turkish Airlines
Deal found 4/17$631

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 April 18, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$571
(FlightHub)

One-way from

$340
(Booking.com)

Popular in

December

Cheapest in

February

Average price

$672
Provider with most accurate pricing for Washington, D.C. Dulles Intl-Sofia flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. Dulles Intl-Sofia flights.
Search Deals
From Washington, D.C. Dulles Intl to Sofia
Search Deals
One-way flight from Washington, D.C. Dulles Intl to Sofia
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($49 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($30 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
Search Deals

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 April 18, 2026.
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

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

Fri 9/18

9:45 pm-8:15 pm

1 stop15h 30m

Sofia

Tue 9/22

9:05 pm-11:35 am

1 stop21h 30m

$692
Quickest round-trip

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

Wed 7/29

10:20 pm-6:40 pm

1 stop13h 20m

Sofia

Tue 8/25

6:10 am-3:05 pm

1 stop15h 55m

$740

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

Wed 9/9

12:35 pm-12:10 pm

2 stops16h 35m

Sofia

Fri 9/11

6:20 am-1:35 pm

1 stop14h 15m

$774

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

Fri 9/18

10:20 pm-6:40 pm

1 stop13h 20m

Sofia

Tue 9/22

6:10 am-4:05 pm

2 stops16h 55m

$883

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

Wed 5/13

8:35 am-11:15 pm

2 stops31h 40m

Sofia

Tue 5/26

6:10 am-4:05 pm

1 stop16h 55m

$941

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

Tue 7/28

5:25 pm-11:15 pm

2 stops22h 50m

Sofia

Mon 8/3

8:00 am-2:35 pm

1 stop13h 35m

$949

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

Tue 5/19

9:45 am-11:00 am

2 stops18h 15m

Sofia

Mon 5/25

6:20 am-9:24 am

2 stops34h 04m

$952

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

Mon 7/6

12:29 pm-2:00 pm

2 stops18h 31m

Sofia

Wed 7/15

7:00 am-6:26 pm

2 stops18h 26m

$966

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

Sat 7/4

10:20 pm-11:15 pm

1 stop17h 55m

Sofia

Wed 7/15

6:10 am-8:00 pm

2 stops20h 50m

$1,046

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

Wed 5/13

9:45 am-12:10 am

3 stops31h 25m

Sofia

Tue 5/26

4:00 pm-7:00 pm

3 stops34h 00m

$1,094

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/18

Showing 1-10 of 21 resultsSorted by cheapest first
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3

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 April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 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 Washington, D.C. Dulles Intl Airport-Sofia flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Washington, D.C. Dulles Intl Airport-Sofia flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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 April 17, 2026.

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, February is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Sofia (average of $566). Flying from Washington, D.C. Dulles Intl Airport to Sofia in December is currently the most expensive (average of $1,112). 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.

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 April 18, 2026.
See what other customers who have flown with Austrian Airlines,United Airlines, andTurkish 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
902 reviews

Food

6.8

Overall

7.6

Boarding

7.6

Entertainment

6.8

Comfort

7.3

Crew

8.1

Reviews

1 / 20
10.0
Excellent

KENNETH,Mar 2026

VIE - EWR

Everything was great, took off on time, arrived on time, boarding was smooth, food and movies were great.
Austrian Airlines
7.6
Good
902 reviews
Austrian Airlines
7.6
Good
902 reviews

Food

6.8

Overall

7.6

Boarding

7.6

Entertainment

6.8

Comfort

7.3

Crew

8.1

Reviews

1 / 20
10.0
Excellent

KENNETH,Mar 2026

VIE - EWR

Everything was great, took off on time, arrived on time, boarding was smooth, food and movies were great.
United Airlines
7.4
Good
9,605 reviews
Austrian Airlines
7.6
Good
902 reviews

Food

6.8

Overall

7.6

Boarding

7.6

Entertainment

6.8

Comfort

7.3

Crew

8.1

Reviews

1 / 20
10.0
Excellent

KENNETH,Mar 2026

VIE - EWR

Everything was great, took off on time, arrived on time, boarding was smooth, food and movies were great.
Turkish Airlines
7.3
Good
4,308 reviews
Austrian Airlines
7.6
Good
902 reviews

Food

6.8

Overall

7.6

Boarding

7.6

Entertainment

6.8

Comfort

7.3

Crew

8.1

Reviews

1 / 20
10.0
Excellent

KENNETH,Mar 2026

VIE - EWR

Everything was great, took off on time, arrived on time, boarding was smooth, food and movies were great.
Lufthansa
6.8
Okay
7,930 reviews
Austrian Airlines
7.6
Good
902 reviews

Food

6.8

Overall

7.6

Boarding

7.6

Entertainment

6.8

Comfort

7.3

Crew

8.1

Reviews

1 / 20
10.0
Excellent

KENNETH,Mar 2026

VIE - EWR

Everything was great, took off on time, arrived on time, boarding was smooth, food and movies were great.

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 4 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 $571, Turkish Airlines can have you in Sofia from Washington, D.C. Dulles Intl Airport in 18h 40m. Washington, D.C. Dulles Intl Airport and Sofia are separated by a distance of 4931 mi.

  • 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 $522. Other airlines that can offer you cheap pricing are United Airlines, from $637, and Lufthansa, from $650. These flights start at 33% 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, February is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Sofia (average of $566). Flying from Washington, D.C. Dulles Intl Airport to Sofia in December is currently the most expensive (average of $1,112). 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.
Baltimore to Sofia flights

Top 4 airlines flying from Dulles Intl to Sofia

Discover the top 4 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 April 18, 2026.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapest$522Average$653FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$637Average$947FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$650Average$866FlexibilityNo cancel feeOn-time76%
Austrian AirlinesCheapest$731Average$1,131FlexibilityNo cancel feeOn-time78%

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