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$292+ 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 7/8. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SOF
mai 24 — mai 311
sam. 5/24
sam. 5/31
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 44 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 mai 19, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$762
(FlightHub)

One-way from

$292
(Kiwi.com)

Popular in

July

Cheapest in

January

Average price

$878
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. 20% potential increase in price ($222 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($28 potential savings vs. average RT price).
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Average for round-trip flights in May 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 mai 19, 2025.

This United Airlines deal was found by Cheapflights users on 5/18. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sam. 7/510:20 pmIAD - SOF
1 stop17h 40mUnited Airlines
lun. 8/188:00 amSOF - IAD
1 stop13h 35mUnited Airlines
Deal found 5/18$788
This SWISS deal was found by Cheapflights users on 5/18. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sam. 7/58:45 pmIAD - SOF
2 stops32h 15mSWISS
mar. 8/191:15 pmSOF - IAD
1 stop34h 00mSWISS
Deal found 5/18$789
This FlightHub deal was found by Cheapflights users on 5/19. 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.
lun. 7/710:20 pmIAD - SOF
1 stop17h 40mLufthansa
lun. 8/117:25 pmSOF - IAD
2 stops27h 25mLufthansa
Deal found 5/19$790
This Mytrip deal was found by Cheapflights users on 5/19. 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.
jeu. 7/104:30 pmIAD - SOF
2 stops27h 25mMultiple Airlines
mer. 7/164:05 pmSOF - IAD
2 stops29h 35mMultiple Airlines
Deal found 5/19$795
This Trip.com deal was found by Cheapflights users on 5/19. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jeu. 7/104:30 pmIAD - SOF
1 stop17h 40mITA Airways
mer. 7/1612:55 pmSOF - IAD
1 stop32h 45mITA Airways
Deal found 5/19$797
This Air Canada deal was found by Cheapflights users on 5/18. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jeu. 5/292:25 pmIAD - SOF
2 stops14h 35mAir Canada
ven. 6/66:15 amSOF - IAD
2 stops17h 04mAir Canada
Deal found 5/18$824
This British Airways deal was found by Cheapflights users on 5/18. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jeu. 7/35:50 pmIAD - SOF
1 stop12h 40mBritish Airways
mer. 8/209:30 pmSOF - IAD
1 stop27h 05mBritish Airways
Deal found 5/18$827
This Austrian Airlines deal was found by Cheapflights users on 5/18. 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 Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ven. 7/410:20 pmIAD - SOF
2 stops34h 00mAustrian Airlines
jeu. 8/2112:25 pmSOF - IAD
2 stops34h 00mAustrian Airlines
Deal found 5/18$907

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 mai 19, 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

sam. 7/5

10:20 pm-11:00 pm

1 stop17h 40m

Sofia

lun. 8/18

8:00 am-2:35 pm

1 stop13h 35m

$788

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

sam. 7/5

8:45 pm-12:00 pm

2 stops32h 15m

Sofia

mar. 8/19

1:15 pm-4:15 pm

1 stop34h 00m

$789

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

lun. 7/7

10:20 pm-11:00 pm

1 stop17h 40m

Sofia

lun. 8/11

7:25 pm-3:50 pm

2 stops27h 25m

$790

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

jeu. 7/10

4:30 pm-2:55 am

2 stops27h 25m

Sofia

mer. 7/16

4:05 pm-2:40 pm

2 stops29h 35m

$795

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

jeu. 7/10

4:30 pm-5:10 pm

1 stop17h 40m

Sofia

mer. 7/16

12:55 pm-2:40 pm

1 stop32h 45m

$797

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

jeu. 5/29

2:25 pm-12:00 pm

2 stops14h 35m

Sofia

ven. 6/6

6:15 am-4:19 pm

2 stops17h 04m

$824

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

jeu. 7/3

5:50 pm-1:30 pm

1 stop12h 40m

Sofia

mer. 8/20

9:30 pm-5:35 pm

1 stop27h 05m

$827

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

ven. 7/4

10:20 pm-3:20 pm

2 stops34h 00m

Sofia

jeu. 8/21

12:25 pm-3:25 pm

2 stops34h 00m

$907

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

mar. 7/8

8:30 pm-10:25 am

3 stops30h 55m

$292

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

ven. 8/22

10:20 pm-6:40 pm

1 stop13h 20m

$408

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/18

Showing 1-10 of 16 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 May.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*2 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
Justfly.comPrice Accuracy3 starsTrust Score*2 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 AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Washington, D.C. Dulles Intl Airport-Sofia flight deals on Cheapflights vs. AranGrant >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 AranGrant the most. AranGrant 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 May 16, 2025.

Booking 44 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 $632). Flying from Washington, D.C. Dulles Intl Airport to Sofia in June is currently the most expensive (average of $1,208). 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 mai 19, 2025.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 38% on flights from Washington, D.C. Dulles Intl Airport to Sofia by exploring options for tickets at noon.

Rainfall in Sofia by month

Plan your trip to Sofia by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Sofia ranges from 1.2 - 2.8 inches per month. June is typically the wettest month, when rainfall can reach 2.8 in. January is typically the driest time to visit Sofia when rainfall is around 1.2 in.

Temperature in Sofia by month

Plan your trip to Sofia by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Sofia, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 68.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 30.2 F).

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 mai 19, 2025.
Read through reviews of airlines operating flights from Washington, D.C. to Sofia, such as Austrian Airlines, SWISS and Air France. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Austrian Airlines
7.6
Good
792 reviews

Comfort

7.3

Food

6.7

Crew

8.1

Boarding

7.6

Entertainment

6.8

Overall

7.6

Reviews

1 / 20
8.0
Excellent

Ely,Mar 2025

VIE - PMI

Luggage at destination was not split into priorities. Had business and only got my bag after 20 minutes, almost towards the end and I was in a rush, so the "priority" was completely ignored.
Austrian Airlines
7.6
Good
792 reviews
Austrian Airlines
7.6
Good
792 reviews

Comfort

7.3

Food

6.7

Crew

8.1

Boarding

7.6

Entertainment

6.8

Overall

7.6

Reviews

1 / 20
8.0
Excellent

Ely,Mar 2025

VIE - PMI

Luggage at destination was not split into priorities. Had business and only got my bag after 20 minutes, almost towards the end and I was in a rush, so the "priority" was completely ignored.
SWISS
7.5
Good
1,598 reviews
Austrian Airlines
7.6
Good
792 reviews

Comfort

7.3

Food

6.7

Crew

8.1

Boarding

7.6

Entertainment

6.8

Overall

7.6

Reviews

1 / 20
8.0
Excellent

Ely,Mar 2025

VIE - PMI

Luggage at destination was not split into priorities. Had business and only got my bag after 20 minutes, almost towards the end and I was in a rush, so the "priority" was completely ignored.
Air France
7.4
Good
1,451 reviews
Austrian Airlines
7.6
Good
792 reviews

Comfort

7.3

Food

6.7

Crew

8.1

Boarding

7.6

Entertainment

6.8

Overall

7.6

Reviews

1 / 20
8.0
Excellent

Ely,Mar 2025

VIE - PMI

Luggage at destination was not split into priorities. Had business and only got my bag after 20 minutes, almost towards the end and I was in a rush, so the "priority" was completely ignored.
United Airlines
7.4
Good
8,743 reviews
Austrian Airlines
7.6
Good
792 reviews

Comfort

7.3

Food

6.7

Crew

8.1

Boarding

7.6

Entertainment

6.8

Overall

7.6

Reviews

1 / 20
8.0
Excellent

Ely,Mar 2025

VIE - PMI

Luggage at destination was not split into priorities. Had business and only got my bag after 20 minutes, almost towards the end and I was in a rush, so the "priority" was completely ignored.
Air Canada
7.0
Good
9,369 reviews
Austrian Airlines
7.6
Good
792 reviews

Comfort

7.3

Food

6.7

Crew

8.1

Boarding

7.6

Entertainment

6.8

Overall

7.6

Reviews

1 / 20
8.0
Excellent

Ely,Mar 2025

VIE - PMI

Luggage at destination was not split into priorities. Had business and only got my bag after 20 minutes, almost towards the end and I was in a rush, so the "priority" was completely ignored.

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 7 airlines. Sofia is conveniently located just 4.2 mi from Sofia’s city center.

  • 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 $762. Other airlines that can offer you cheap pricing are United Airlines, from $763, and Air France, from $783. These flights start at 12% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from Washington, D.C. Dulles Intl Airport to Sofia one-way?

    The cheapest airlines for a one-way flight from Washington, D.C. Dulles Intl Airport to Sofia are Air France ($441), Air Canada ($448), and Lufthansa ($513).

  • 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 $632). Flying from Washington, D.C. Dulles Intl Airport to Sofia in June is currently the most expensive (average of $1,208). 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 7 airlines flying from Dulles Intl to Sofia

Discover the top 7 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 mai 19, 2025.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapest$552Average$713FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$619Average$1,036FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$709Average$1,135FlexibilityNo cancel feeOn-time69%
Austrian AirlinesCheapest$709Average$1,069FlexibilityNo cancel feeOn-time78%
LufthansaCheapest$762Average$1,056FlexibilityNo cancel feeOn-time76%
ITA AirwaysCheapest$768Average$1,288FlexibilityNo cancel feeOn-time81%
SWISSCheapest$792Average$1,108FlexibilityNo cancel feeOn-time79%

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