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$295+ 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 7/12. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SOF
jun. 17 — jun. 241
mar. 6/17
mar. 6/24
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 17 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 junio 12, 2025.

Round-trip from

$733
(United Airlines)

One-way from

$295
(Kiwi.com)

Popular in

July

Cheapest in

January

Average price

$1,087
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. 18% potential increase in price ($194 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($22 potential savings vs. average RT price).
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Average for round-trip flights in June 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 junio 12, 2025.

This United Airlines deal was found by Cheapflights users on 6/9. 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.
sáb. 7/266:10 pmIAD - SOF
1 stop21h 40mUnited Airlines
mié. 8/276:15 amSOF - IAD
1 stop16h 00mUnited Airlines
Deal found 6/9$733
This SWISS deal was found by Cheapflights users on 6/9. 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.
jue. 7/248:45 pmIAD - SOF
1 stop30h 20mSWISS
mié. 8/2710:50 amSOF - IAD
1 stop12h 25mSWISS
Deal found 6/9$734
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 11/206:15 pmIAD - SOF
1 stop18h 10mAmerican Airlines
mar. 11/256:05 pmSOF - IAD
1 stop28h 30mAmerican Airlines
Deal found 6/10$736
This Ovago 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 8/1110:20 pmIAD - SOF
1 stop17h 40mLufthansa
mié. 8/206:15 amSOF - IAD
1 stop20h 50mLufthansa
Deal found 6/10$741
This Air Canada deal was found by Cheapflights users on 6/9. 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.
jue. 7/242:25 pmIAD - SOF
2 stops14h 35mAir Canada
mar. 8/2612:45 pmSOF - IAD
2 stops29h 28mAir Canada
Deal found 6/9$742
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.
lun. 8/410:20 amIAD - SOF
2 stops17h 55mMultiple Airlines
lun. 8/187:25 pmSOF - IAD
1 stop31h 00mMultiple Airlines
Deal found 6/12$744
This Austrian 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 Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 8/165:13 pmIAD - SOF
2 stops35h 27mAustrian Airlines
dom. 8/314:05 pmSOF - IAD
1 stop29h 30mAustrian Airlines
Deal found 6/10$771
This Gurufare 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 7/1510:40 pmIAD - SOF
1 stop15h 00mBritish Airways
mié. 8/139:30 pmSOF - IAD
1 stop29h 40mBritish Airways
Deal found 6/12$781
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 7/81:30 pmIAD - SOF
1 stop18h 15mTurkish Airlines
mar. 7/159:15 pmSOF - IAD
1 stop21h 30mTurkish Airlines
Deal found 6/10$823
This KLM 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 11/13:00 pmIAD - SOF
2 stops17h 05mKLM
dom. 11/167:00 amSOF - IAD
2 stops16h 31mKLM
Deal found 6/10$875

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 junio 12, 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

sáb. 7/26

6:10 pm-10:50 pm

1 stop21h 40m

Sofia

mié. 8/27

6:15 am-3:15 pm

1 stop16h 00m

$733

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

jue. 7/24

8:45 pm-10:05 am

1 stop30h 20m

Sofia

mié. 8/27

10:50 am-4:15 pm

1 stop12h 25m

$734

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

jue. 11/20

6:15 pm-7:25 pm

1 stop18h 10m

Sofia

mar. 11/25

6:05 pm-3:35 pm

1 stop28h 30m

$736

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

lun. 8/11

10:20 pm-11:00 pm

1 stop17h 40m

Sofia

mié. 8/20

6:15 am-8:05 pm

1 stop20h 50m

$741

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

jue. 7/24

2:25 pm-12:00 pm

2 stops14h 35m

Sofia

mar. 8/26

12:45 pm-11:13 am

2 stops29h 28m

$742

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

lun. 8/4

10:20 am-11:15 am

2 stops17h 55m

Sofia

lun. 8/18

7:25 pm-7:25 pm

1 stop31h 00m

$744

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

sáb. 8/16

5:13 pm-11:40 am

2 stops35h 27m

Sofia

dom. 8/31

4:05 pm-2:35 pm

1 stop29h 30m

$771

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

mar. 7/15

10:40 pm-8:40 pm

1 stop15h 00m

Sofia

mié. 8/13

9:30 pm-8:10 pm

1 stop29h 40m

$781

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

mar. 7/8

1:30 pm-2:45 pm

1 stop18h 15m

Sofia

mar. 7/15

9:15 pm-11:45 am

1 stop21h 30m

$823

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

sáb. 11/1

3:00 pm-2:05 pm

2 stops17h 05m

Sofia

dom. 11/16

7:00 am-4:31 pm

2 stops16h 31m

$875

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/9

Showing 1-10 of 16 results
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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 June 9, 2025.

Booking 17 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 $1,203). 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 junio 12, 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 junio 12, 2025.
Read through reviews of airlines operating flights from Washington, D.C. to Sofia, such as Austrian Airlines, Air France and SWISS. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Austrian Airlines
7.6
Good
802 reviews

Crew

8.1

Overall

7.6

Boarding

7.6

Comfort

7.3

Food

6.8

Entertainment

6.8

Reviews

1 / 20
8.0
Excellent

Grant,Jun 2025

VIE - FRA

A delay was caused by computer malfunctions after we left the gate. It was handled well
Austrian Airlines
7.6
Good
802 reviews
Austrian Airlines
7.6
Good
802 reviews

Crew

8.1

Overall

7.6

Boarding

7.6

Comfort

7.3

Food

6.8

Entertainment

6.8

Reviews

1 / 20
8.0
Excellent

Grant,Jun 2025

VIE - FRA

A delay was caused by computer malfunctions after we left the gate. It was handled well
Air France
7.5
Good
1,463 reviews
Austrian Airlines
7.6
Good
802 reviews

Crew

8.1

Overall

7.6

Boarding

7.6

Comfort

7.3

Food

6.8

Entertainment

6.8

Reviews

1 / 20
8.0
Excellent

Grant,Jun 2025

VIE - FRA

A delay was caused by computer malfunctions after we left the gate. It was handled well
SWISS
7.5
Good
1,623 reviews
Austrian Airlines
7.6
Good
802 reviews

Crew

8.1

Overall

7.6

Boarding

7.6

Comfort

7.3

Food

6.8

Entertainment

6.8

Reviews

1 / 20
8.0
Excellent

Grant,Jun 2025

VIE - FRA

A delay was caused by computer malfunctions after we left the gate. It was handled well
United Airlines
7.4
Good
8,790 reviews
Austrian Airlines
7.6
Good
802 reviews

Crew

8.1

Overall

7.6

Boarding

7.6

Comfort

7.3

Food

6.8

Entertainment

6.8

Reviews

1 / 20
8.0
Excellent

Grant,Jun 2025

VIE - FRA

A delay was caused by computer malfunctions after we left the gate. It was handled well
Turkish Airlines
7.3
Good
3,848 reviews
Austrian Airlines
7.6
Good
802 reviews

Crew

8.1

Overall

7.6

Boarding

7.6

Comfort

7.3

Food

6.8

Entertainment

6.8

Reviews

1 / 20
8.0
Excellent

Grant,Jun 2025

VIE - FRA

A delay was caused by computer malfunctions after we left the gate. It was handled well

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 $733. Other airlines that can offer you cheap pricing are SWISS, from $734, and Lufthansa, from $741. These flights start at 14% 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 Turkish Airlines ($444), Lufthansa ($461), and Air France ($510).

  • 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 $1,203). 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 junio 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapest$552Average$700FlexibilityNo cancel feeOn-time77%
SWISSCheapest$552Average$993FlexibilityNo cancel feeOn-time79%
Austrian AirlinesCheapest$667Average$1,069FlexibilityNo cancel feeOn-time78%
United AirlinesCheapest$680Average$968FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$707Average$990FlexibilityNo cancel feeOn-time76%
ITA AirwaysCheapest$879Average$1,159FlexibilityNo cancel feeOn-time81%

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