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$256+ 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 10/21. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SOF
Nov 12 — Nov 191
Wed 11/12
Wed 11/19
1 adult, Economy
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Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to Sofia are usually found in January or March, booked 18 days in advance, depart on a Wednesday or Thursday and return on a Wednesday

Cheap 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 October 13, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$481
(Kiwi.com)

One-way from

$441
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$686
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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Highest demand for flights based on searches. 12% potential increase in price ($122 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($21 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find 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 October 13, 2025.

This Kiwi.com deal was found by Cheapflights users on 10/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/110:55 pmIAD - SOF
1 stop12h 25mLufthansa
Mon 12/156:10 amSOF - IAD
1 stop16h 40mLufthansa
Deal found 10/12$481
This Kiwi.com deal was found by Cheapflights users on 10/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1210:55 pmIAD - SOF
1 stop12h 25mLufthansa
Wed 11/262:00 pmSOF - IAD
1 stop13h 05mLufthansa
Deal found 10/12$484
This Kiwi.com deal was found by Cheapflights users on 10/11. 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 11/2610:55 pmIAD - SOF
1 stop12h 25mLufthansa
Wed 12/32:00 pmSOF - IAD
1 stop13h 05mLufthansa
Deal found 10/11$486
This Mytrip deal was found by Cheapflights users on 10/12. 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.
Wed 11/1210:55 pmIAD - SOF
1 stop12h 25mMultiple Airlines
Wed 11/266:10 amSOF - IAD
2 stops21h 44mMultiple Airlines
Deal found 10/12$499
This CrystalTravel deal was found by Cheapflights users on 10/11. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/2410:55 pmIAD - SOF
1 stop12h 25mLufthansa
Wed 12/36:10 amSOF - IAD
1 stop16h 40mLufthansa
Deal found 10/11$500
This FlightHub deal was found by Cheapflights users on 10/13. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/209:40 pmIAD - SOF
1 stop15h 45mTurkish Airlines
Tue 10/289:40 pmSOF - IAD
1 stop21h 05mTurkish Airlines
Deal found 10/13$503
This Kiwi.com deal was found by Cheapflights users on 10/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/116:00 pmIAD - SOF
1 stop22h 55mAustrian Airlines
Tue 11/257:55 amSOF - IAD
1 stop13h 45mAustrian Airlines
Deal found 10/12$504
This Mytrip deal was found by Cheapflights users on 10/12. 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.
Mon 12/110:55 pmIAD - SOF
1 stop16h 50mMultiple Airlines
Mon 12/156:10 amSOF - IAD
2 stops21h 49mMultiple Airlines
Deal found 10/12$505
This Kiwi.com deal was found by Cheapflights users on 10/11. 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 11/266:00 pmIAD - SOF
1 stop10h 50mMultiple Airlines
Sat 12/66:25 amSOF - IAD
1 stop16h 25mMultiple Airlines
Deal found 10/11$506
This Mytrip deal was found by Cheapflights users on 10/13. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/139:45 amIAD - SOF
2 stops21h 05mMultiple Airlines
Thu 11/276:00 amSOF - IAD
2 stops21h 54mMultiple Airlines
Deal found 10/13$511
This Mytrip deal was found by Cheapflights users on 10/12. 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 11/116:00 pmIAD - SOF
1 stop12h 45mMultiple Airlines
Tue 11/256:00 amSOF - IAD
2 stops21h 54mMultiple Airlines
Deal found 10/12$512

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 October 13, 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 11/12

10:55 pm-6:20 pm

1 stop12h 25m

Sofia

Wed 11/26

2:00 pm-8:05 pm

1 stop13h 05m

$484

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

Mon 12/1

1:30 pm-3:10 pm

1 stop18h 40m

Sofia

Wed 12/10

4:00 pm-7:20 pm

1 stop34h 20m

$512

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

Mon 12/1

9:45 am-1:25 pm

2 stops20h 40m

Sofia

Mon 12/15

6:10 am-8:59 pm

2 stops21h 49m

$517

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

Wed 11/12

1:30 pm-3:10 pm

1 stop18h 40m

Sofia

Wed 11/26

9:35 am-7:20 pm

1 stop16h 45m

$521

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

Mon 12/1

10:55 pm-6:20 pm

1 stop12h 25m

Sofia

Mon 12/15

6:05 am-3:50 pm

2 stops16h 45m

$523

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

Mon 12/1

10:55 pm-6:20 pm

1 stop12h 25m

Sofia

Mon 12/8

6:10 am-8:59 pm

2 stops21h 49m

$527

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

Thu 11/13

5:40 pm-1:15 pm

1 stop12h 35m

Sofia

Thu 11/27

6:00 am-3:50 pm

1 stop16h 50m

$527

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

Mon 12/1

10:55 pm-6:20 pm

1 stop12h 25m

Sofia

Mon 12/15

6:10 am-8:59 pm

2 stops21h 49m

$527

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

Sat 11/8

10:55 pm-6:20 pm

1 stop12h 25m

Sofia

Fri 11/21

2:35 pm-8:15 pm

1 stop12h 40m

$527

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

Sun 11/23

5:40 pm-1:00 pm

1 stop12h 20m

Sofia

Wed 12/3

6:10 am-9:21 pm

2 stops22h 11m

$538

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/13

Showing 1-10 of 20 results
1
2

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 October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 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 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 October 10, 2025.

Booking 18 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, November is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Sofia (average of $534). Flying from Washington, D.C. Dulles Intl Airport to Sofia in June is currently the most expensive (average of $831). 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 October 13, 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.

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 October 13, 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
853 reviews

Crew

8.1

Overall

7.6

Comfort

7.3

Food

6.8

Boarding

7.6

Entertainment

6.8

Reviews

1 / 20
10.0
Excellent

Andrew,Sep 2025

FLR - VIE

Staff was really nice, they provided water as a beverage. Otherwise you had to purchase beverages or food. A complementary chocolate was provided at the end of the flight.
Austrian Airlines
7.6
Good
853 reviews
Austrian Airlines
7.6
Good
853 reviews

Crew

8.1

Overall

7.6

Comfort

7.3

Food

6.8

Boarding

7.6

Entertainment

6.8

Reviews

1 / 20
10.0
Excellent

Andrew,Sep 2025

FLR - VIE

Staff was really nice, they provided water as a beverage. Otherwise you had to purchase beverages or food. A complementary chocolate was provided at the end of the flight.
United Airlines
7.4
Good
8,975 reviews
Austrian Airlines
7.6
Good
853 reviews

Crew

8.1

Overall

7.6

Comfort

7.3

Food

6.8

Boarding

7.6

Entertainment

6.8

Reviews

1 / 20
10.0
Excellent

Andrew,Sep 2025

FLR - VIE

Staff was really nice, they provided water as a beverage. Otherwise you had to purchase beverages or food. A complementary chocolate was provided at the end of the flight.
Turkish Airlines
7.3
Good
4,007 reviews
Austrian Airlines
7.6
Good
853 reviews

Crew

8.1

Overall

7.6

Comfort

7.3

Food

6.8

Boarding

7.6

Entertainment

6.8

Reviews

1 / 20
10.0
Excellent

Andrew,Sep 2025

FLR - VIE

Staff was really nice, they provided water as a beverage. Otherwise you had to purchase beverages or food. A complementary chocolate was provided at the end of the flight.
Lufthansa
6.8
Okay
7,484 reviews
Austrian Airlines
7.6
Good
853 reviews

Crew

8.1

Overall

7.6

Comfort

7.3

Food

6.8

Boarding

7.6

Entertainment

6.8

Reviews

1 / 20
10.0
Excellent

Andrew,Sep 2025

FLR - VIE

Staff was really nice, they provided water as a beverage. Otherwise you had to purchase beverages or food. A complementary chocolate was provided at the end of the flight.
ITA Airways
6.7
Okay
1,065 reviews
Austrian Airlines
7.6
Good
853 reviews

Crew

8.1

Overall

7.6

Comfort

7.3

Food

6.8

Boarding

7.6

Entertainment

6.8

Reviews

1 / 20
10.0
Excellent

Andrew,Sep 2025

FLR - VIE

Staff was really nice, they provided water as a beverage. Otherwise you had to purchase beverages or food. A complementary chocolate was provided at the end of the 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 6 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 $484, Lufthansa can have you in Sofia from Washington, D.C. Dulles Intl Airport in 12h 25m. 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 $550. Other airlines that can offer you cheap pricing are SWISS, from $552, and United Airlines, from $679. These flights start at 35% 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, November is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Sofia (average of $534). Flying from Washington, D.C. Dulles Intl Airport to Sofia in June is currently the most expensive (average of $831). 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.
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Baltimore to Sofia flights

Top 6 airlines flying from Dulles Intl to Sofia

Discover the top 6 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 October 13, 2025.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapest$550Average$683FlexibilityNo cancel feeOn-time77%
SWISSCheapest$552Average$993FlexibilityNo cancel feeOn-time79%
United AirlinesCheapest$679Average$839FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$691Average$964FlexibilityNo cancel feeOn-time76%
Austrian AirlinesCheapest$719Average$1,184FlexibilityNo cancel feeOn-time78%
ITA AirwaysCheapest$951Average$1,159FlexibilityNo cancel feeOn-time81%

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