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Sofia

$594+ Cheap flights from Dulles Intl (IAD) to Sofia (SOF)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/3. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SOF
Aug 19 — Aug 261
Tue 8/19
Tue 8/26
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 August 14, 2025.

Round-trip from

$594
(FlightHub)

Popular in

June

Cheapest in

January

Average price

$975
From Washington, D.C. Dulles Intl to Sofia
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($116 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($20 potential savings vs. average RT price).
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Average for round-trip flights in August 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 August 14, 2025.

This FlightHub deal was found by Cheapflights users on 8/14. 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.
Fri 10/39:40 pmIAD - SOF
1 stop15h 45mTurkish Airlines
Fri 10/173:35 pmSOF - IAD
1 stop35h 10mTurkish Airlines
Deal found 8/14$594
This CrystalTravel deal was found by Cheapflights users on 8/13. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/311:30 pmIAD - SOF
1 stop23h 55mTurkish Airlines
Thu 9/259:15 pmSOF - IAD
1 stop21h 30mTurkish Airlines
Deal found 8/13$599
This United Airlines deal was found by Cheapflights users on 8/13. 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.
Sun 11/25:40 pmIAD - SOF
1 stop17h 40mUnited Airlines
Tue 11/116:00 amSOF - IAD
1 stop16h 50mUnited Airlines
Deal found 8/13$600
This oojo deal was found by Cheapflights users on 8/12. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/169:40 pmIAD - SOF
1 stop15h 45mTurkish Airlines
Thu 9/259:15 pmSOF - IAD
1 stop21h 30mTurkish Airlines
Deal found 8/12$601
This FlightHub deal was found by Cheapflights users on 8/12. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/89:40 pmIAD - SOF
1 stop27h 55mTurkish Airlines
Mon 9/159:15 pmSOF - IAD
1 stop21h 30mTurkish Airlines
Deal found 8/12$602
This FlightHub deal was found by Cheapflights users on 8/12. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/31:00 pmIAD - SOF
2 stops17h 15mAir Canada
Wed 11/196:15 amSOF - IAD
2 stops17h 06mAir Canada
Deal found 8/12$604
This United Airlines deal was found by Cheapflights users on 8/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/11:00 pmIAD - SOF
2 stops17h 00mUnited Airlines
Wed 11/56:15 amSOF - IAD
1 stop16h 35mUnited Airlines
Deal found 8/11$605
This Air Canada deal was found by Cheapflights users on 8/12. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/810:11 pmIAD - SOF
2 stops37h 09mAir Canada
Fri 12/56:10 amSOF - IAD
2 stops21h 49mAir Canada
Deal found 8/12$607
This Ovago deal was found by Cheapflights users on 8/12. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/105:29 pmIAD - SOF
2 stops43h 41mBritish Airways
Mon 11/245:25 pmSOF - IAD
1 stop29h 10mBritish Airways
Deal found 8/12$608
This KAYAK deal was found by Cheapflights users on 8/11. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/18:45 pmIAD - SOF
1 stop30h 20mSWISS
Mon 11/33:00 pmSOF - IAD
1 stop32h 40mSWISS
Deal found 8/11$610
This Air Canada deal was found by Cheapflights users on 8/13. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/15:15 pmIAD - SOF
2 stops38h 20mAir Canada
Tue 11/116:00 amSOF - IAD
2 stops21h 59mAir Canada
Deal found 8/13$611
This FlightHub deal was found by Cheapflights users on 8/11. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/51:30 pmIAD - SOF
1 stop23h 55mTurkish Airlines
Fri 9/193:35 pmSOF - IAD
1 stop27h 10mTurkish Airlines
Deal found 8/11$612

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 August 14, 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

Fri 10/3

9:40 pm-8:25 pm

1 stop15h 45m

Sofia

Fri 10/17

3:35 pm-7:45 pm

1 stop35h 10m

$594

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

Wed 1/14

5:25 pm-3:15 pm

1 stop14h 50m

Sofia

Wed 1/28

2:25 pm-8:15 pm

1 stop12h 50m

$598

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

Sun 8/31

1:30 pm-8:25 pm

1 stop23h 55m

Sofia

Thu 9/25

9:15 pm-11:45 am

1 stop21h 30m

$599

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

Tue 11/18

5:40 pm-1:10 pm

1 stop12h 30m

Sofia

Tue 11/25

6:00 am-8:59 pm

2 stops21h 59m

$600

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

Sun 11/2

1:20 pm-1:10 pm

2 stops16h 50m

Sofia

Tue 11/11

6:00 am-8:59 pm

2 stops21h 59m

$600

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

Wed 9/3

10:20 pm-11:00 pm

1 stop17h 40m

Sofia

Wed 11/19

6:15 am-8:59 pm

2 stops21h 44m

$600

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

Wed 11/12

11:10 pm-6:20 pm

1 stop12h 10m

Sofia

Wed 11/26

6:10 am-4:21 pm

2 stops17h 11m

$600

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

Wed 11/12

9:45 am-6:20 pm

2 stops25h 35m

Sofia

Wed 11/26

6:10 am-8:59 pm

2 stops21h 49m

$600

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

Tue 11/4

5:40 pm-6:20 pm

1 stop17h 40m

Sofia

Thu 11/13

6:00 am-4:21 pm

2 stops17h 21m

$600

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

Sun 11/2

9:45 am-1:10 pm

2 stops20h 25m

Sofia

Tue 11/11

6:00 am-3:50 pm

1 stop16h 50m

$600

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/14

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 August 8, 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 $632). Flying from Washington, D.C. Dulles Intl Airport to Sofia in June is currently the most expensive (average of $1,186). 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 August 14, 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.

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 August 14, 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
829 reviews

Crew

8.1

Entertainment

6.8

Food

6.8

Boarding

7.6

Comfort

7.3

Overall

7.6

Reviews

1 / 20
10.0
Excellent

Dominik,Jun 2025

VIE - VNO

Good service and update all information. I feel like i wanna use it again next time
Austrian Airlines
7.6
Good
829 reviews
Austrian Airlines
7.6
Good
829 reviews

Crew

8.1

Entertainment

6.8

Food

6.8

Boarding

7.6

Comfort

7.3

Overall

7.6

Reviews

1 / 20
10.0
Excellent

Dominik,Jun 2025

VIE - VNO

Good service and update all information. I feel like i wanna use it again next time
United Airlines
7.4
Good
8,916 reviews
Austrian Airlines
7.6
Good
829 reviews

Crew

8.1

Entertainment

6.8

Food

6.8

Boarding

7.6

Comfort

7.3

Overall

7.6

Reviews

1 / 20
10.0
Excellent

Dominik,Jun 2025

VIE - VNO

Good service and update all information. I feel like i wanna use it again next time
Turkish Airlines
7.3
Good
3,940 reviews
Austrian Airlines
7.6
Good
829 reviews

Crew

8.1

Entertainment

6.8

Food

6.8

Boarding

7.6

Comfort

7.3

Overall

7.6

Reviews

1 / 20
10.0
Excellent

Dominik,Jun 2025

VIE - VNO

Good service and update all information. I feel like i wanna use it again next time
Lufthansa
6.8
Okay
7,317 reviews
Austrian Airlines
7.6
Good
829 reviews

Crew

8.1

Entertainment

6.8

Food

6.8

Boarding

7.6

Comfort

7.3

Overall

7.6

Reviews

1 / 20
10.0
Excellent

Dominik,Jun 2025

VIE - VNO

Good service and update all information. I feel like i wanna use it again next time
ITA Airways
6.7
Okay
1,018 reviews
Austrian Airlines
7.6
Good
829 reviews

Crew

8.1

Entertainment

6.8

Food

6.8

Boarding

7.6

Comfort

7.3

Overall

7.6

Reviews

1 / 20
10.0
Excellent

Dominik,Jun 2025

VIE - VNO

Good service and update all information. I feel like i wanna use it again next time

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.

  • 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 $552. Other airlines that can offer you cheap pricing are SWISS, from $552, and United Airlines, from $679. 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, 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 $1,186). 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

Browse thousands of different options on Cheapflights for your next trip

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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 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 August 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapest$552Average$686FlexibilityNo cancel feeOn-time77%
SWISSCheapest$552Average$993FlexibilityNo cancel feeOn-time79%
United AirlinesCheapest$679Average$839FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$691Average$968FlexibilityNo cancel feeOn-time76%
Austrian AirlinesCheapest$709Average$1,084FlexibilityNo cancel feeOn-time78%
ITA AirwaysCheapest$879Average$1,155FlexibilityNo cancel feeOn-time81%

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