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Sofia

$300+ 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 8/2. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SOF
Jul 15 — Jul 221
Wed 7/15
Wed 7/22
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 June 15, 2026.

This Kiwi.com deal was found by Cheapflights users on 6/10. 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.
Fri 9/1111:20 pm
IAD
-
SOF
2 stops18h 55m
Multiple Airlines
Thu 10/87:30 pm
SOF
-
IAD
1 stop27h 10m
Multiple Airlines
Deal found 6/10$858
This KAYAK deal was found by Cheapflights users on 6/14. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/138:20 pm
IAD
-
SOF
1 stop32h 55m
SWISS
Tue 10/612:55 pm
SOF
-
IAD
2 stops34h 50m
SWISS
Deal found 6/14$859
This Gotogate deal was found by Cheapflights users on 6/10. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/99:55 am
IAD
-
SOF
2 stops19h 15m
Multiple Airlines
Fri 10/236:20 am
SOF
-
IAD
2 stops19h 40m
Multiple Airlines
Deal found 6/10$860
This United Airlines deal was found by Cheapflights users on 6/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/315:30 pm
IAD
-
SOF
1 stop11h 40m
United Airlines
Tue 10/66:10 am
SOF
-
IAD
2 stops19h 50m
United Airlines
Deal found 6/10$861
This United Airlines deal was found by Cheapflights users on 6/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/168:18 am
IAD
-
SOF
2 stops20h 52m
United Airlines
Wed 10/76:20 am
SOF
-
IAD
1 stop16h 45m
United Airlines
Deal found 6/14$862
This United Airlines deal was found by Cheapflights users on 6/13. 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.
Thu 8/61:15 pm
IAD
-
SOF
2 stops15h 55m
United Airlines
Thu 8/206:10 am
SOF
-
IAD
2 stops22h 10m
United Airlines
Deal found 6/13$863
This Gotogate deal was found by Cheapflights users on 6/12. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/59:55 am
IAD
-
SOF
2 stops25h 10m
Multiple Airlines
Wed 8/196:10 am
SOF
-
IAD
2 stops14h 25m
Multiple Airlines
Deal found 6/12$864
This Mytrip deal was found by Cheapflights users on 6/14. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/1612:43 pm
IAD
-
SOF
2 stops22h 57m
Air Canada
Wed 9/3012:55 pm
SOF
-
IAD
2 stops37h 05m
Air Canada
Deal found 6/14$865
This Kiwi.com deal was found by Cheapflights users on 6/10. 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 9/1511:20 pm
IAD
-
SOF
2 stops18h 55m
Multiple Airlines
Sat 10/109:50 pm
SOF
-
IAD
1 stop24h 40m
Multiple Airlines
Deal found 6/10$866
This Mytrip deal was found by Cheapflights users on 6/12. 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.
Tue 8/118:30 pm
IAD
-
SOF
2 stops19h 35m
Multiple Airlines
Mon 9/76:45 pm
SOF
-
IAD
2 stops27h 25m
Multiple Airlines
Deal found 6/12$867
This United Airlines deal was found by Cheapflights users on 6/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/3010:20 pm
IAD
-
SOF
1 stop17h 55m
United Airlines
Tue 10/62:10 pm
SOF
-
IAD
2 stops17h 48m
United Airlines
Deal found 6/10$868
This Air Canada deal was found by Cheapflights users on 6/10. 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 Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/319:55 am
IAD
-
SOF
2 stops19h 15m
Air Canada
Tue 10/66:10 am
SOF
-
IAD
2 stops19h 50m
Air Canada
Deal found 6/10$869

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 June 15, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$858
(Kiwi.com)

One-way from

$300
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$1,162
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. 13% potential increase in price ($123 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($33 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 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 June 15, 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

Wed 9/2

8:20 pm-6:40 pm

2 stops15h 20m

Sofia

Wed 9/9

1:50 pm-12:44 am

2 stops17h 54m

$863

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

Sat 10/3

10:15 pm-6:40 pm

2 stops37h 25m

Sofia

Sat 1/16

2:05 pm-8:15 pm

1 stop13h 10m

$892

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

Wed 9/2

12:29 pm-2:00 pm

2 stops18h 31m

Sofia

Sat 9/19

7:00 am-3:35 pm

1 stop15h 35m

$894

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

Wed 9/2

12:29 pm-2:00 pm

2 stops18h 31m

Sofia

Sun 9/20

7:00 am-5:33 pm

2 stops17h 33m

$904

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

Tue 7/14

12:55 pm-11:15 pm

2 stops27h 20m

Sofia

Tue 7/28

12:55 pm-7:25 pm

1 stop13h 30m

$920

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

Wed 7/15

10:20 pm-11:15 pm

1 stop17h 55m

Sofia

Wed 7/29

6:10 am-11:11 am

2 stops36h 01m

$924

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

Wed 7/22

10:20 pm-6:40 pm

1 stop13h 20m

Sofia

Thu 7/30

6:10 am-4:32 pm

2 stops17h 22m

$926

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

Mon 7/20

10:20 pm-11:15 pm

1 stop17h 55m

Sofia

Thu 8/6

6:10 am-7:02 pm

2 stops19h 52m

$926

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

Tue 7/21

10:20 pm-6:40 pm

1 stop13h 20m

Sofia

Fri 7/31

6:20 am-11:19 pm

2 stops23h 59m

$927

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

Mon 8/31

6:10 pm-2:00 pm

1 stop12h 50m

Sofia

Sat 9/19

7:00 am-5:33 pm

2 stops17h 33m

$929

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/12

Showing 1-10 of 18 resultsSorted by cheapest first
1
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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 June.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice 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 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?

Booking 13 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 June is currently the most expensive (average of $1,162). 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 June 15, 2026.
See what other customers who have flown with Austrian Airlines,Turkish Airlines, andUnited 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
935 reviews

Entertainment

6.8

Overall

7.6

Comfort

7.3

Crew

8.1

Food

6.8

Boarding

7.6

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
935 reviews
Austrian Airlines
7.6
Good
935 reviews

Entertainment

6.8

Overall

7.6

Comfort

7.3

Crew

8.1

Food

6.8

Boarding

7.6

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
7.4
Good
4,409 reviews
Austrian Airlines
7.6
Good
935 reviews

Entertainment

6.8

Overall

7.6

Comfort

7.3

Crew

8.1

Food

6.8

Boarding

7.6

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
9,843 reviews
Austrian Airlines
7.6
Good
935 reviews

Entertainment

6.8

Overall

7.6

Comfort

7.3

Crew

8.1

Food

6.8

Boarding

7.6

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
8,066 reviews
Austrian Airlines
7.6
Good
935 reviews

Entertainment

6.8

Overall

7.6

Comfort

7.3

Crew

8.1

Food

6.8

Boarding

7.6

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 $863, United Airlines can have you in Sofia from Washington, D.C. Dulles Intl Airport in 15h 20m. 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 $522. Other airlines that can offer you cheap pricing are Lufthansa, from $650, and United Airlines, from $667. These flights start at 34% 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 June is currently the most expensive (average of $1,162). 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 June 15, 2026.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapest$522Average$664FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$650Average$872FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$667Average$988FlexibilityNo cancel feeOn-time69%
Austrian AirlinesCheapest$809Average$1,265FlexibilityNo cancel feeOn-time78%

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