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$315+ 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 8/13. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SOF
jul. 3 — jul. 101
jue. 7/3
jue. 7/10
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 28, 2025.

Round-trip from

$655
(United Airlines)

One-way from

$315
(Kiwi.com)

Popular in

July

Cheapest in

January

Average price

$1,086
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 ($196 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 28, 2025.

This United Airlines deal was found by Cheapflights users on 6/27. 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.
dom. 7/276:10 pmIAD - SOF
1 stop21h 40mUnited Airlines
mié. 8/2012:45 pmSOF - IAD
2 stops31h 45mUnited Airlines
Deal found 6/27$655
This Air Canada deal was found by Cheapflights users on 6/25. 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.
vie. 11/74:30 pmIAD - SOF
2 stops18h 45mAir Canada
mar. 11/116:00 amSOF - IAD
2 stops17h 21mAir Canada
Deal found 6/25$660
This Gotogate deal was found by Cheapflights users on 6/27. 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.
mar. 8/199:35 amIAD - SOF
2 stops20h 45mMultiple Airlines
mar. 9/21:15 pmSOF - IAD
1 stop34h 00mMultiple Airlines
Deal found 6/27$665
This FlightHub deal was found by Cheapflights users on 6/28. 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.
vie. 9/129:40 pmIAD - SOF
1 stop27h 55mTurkish Airlines
mié. 9/179:15 pmSOF - IAD
1 stop29h 30mTurkish Airlines
Deal found 6/28$671
This Lufthansa deal was found by Cheapflights users on 6/26. 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 Lufthansa 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
vie. 10/36:15 amSOF - IAD
1 stop16h 35mLufthansa
Deal found 6/26$680
This SWISS deal was found by Cheapflights users on 6/28. 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.
mar. 7/298:45 pmIAD - SOF
1 stop30h 20mSWISS
mar. 8/1212:45 pmSOF - IAD
2 stops34h 30mSWISS
Deal found 6/28$708
This British Airways deal was found by Cheapflights users on 6/26. 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.
mar. 8/1210:40 pmIAD - SOF
1 stop15h 00mBritish Airways
dom. 9/289:10 pmSOF - IAD
1 stop27h 25mBritish Airways
Deal found 6/26$738

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 28, 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

dom. 7/27

6:10 pm-10:50 pm

1 stop21h 40m

Sofia

mié. 8/20

12:45 pm-1:30 pm

2 stops31h 45m

$655

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

vie. 11/7

4:30 pm-6:15 pm

2 stops18h 45m

Sofia

mar. 11/11

6:00 am-4:21 pm

2 stops17h 21m

$660

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

mar. 8/19

9:35 am-1:20 pm

2 stops20h 45m

Sofia

mar. 9/2

1:15 pm-4:15 pm

1 stop34h 00m

$665

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

vie. 9/12

9:40 pm-8:35 am

1 stop27h 55m

Sofia

mié. 9/17

9:15 pm-7:45 pm

1 stop29h 30m

$671

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

dom. 7/27

6:10 pm-10:50 pm

1 stop21h 40m

Sofia

jue. 8/21

6:00 am-3:50 pm

2 stops16h 50m

$702

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

mar. 7/29

8:45 pm-10:05 am

1 stop30h 20m

Sofia

mar. 8/12

12:45 pm-4:15 pm

2 stops34h 30m

$708

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

mar. 8/12

10:40 pm-8:40 pm

1 stop15h 00m

Sofia

dom. 9/28

9:10 pm-5:35 pm

1 stop27h 25m

$738

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

mié. 8/13

10:20 pm-8:55 pm

2 stops39h 35m

$315

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

mié. 8/13

1:30 pm-8:25 pm

1 stop23h 55m

$417

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

mar. 7/22

5:50 pm-8:40 pm

1 stop19h 50m

$502

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/26

Showing 1-10 of 12 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 20, 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 $1,192). 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 28, 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.

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 junio 28, 2025.
See what other customers who have flown with United Airlines, Turkish Airlines, and Air Canada 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.
United Airlines
7.4
Good
8,838 reviews

Crew

8.1

Entertainment

7.0

Boarding

7.7

Comfort

7.3

Overall

7.4

Food

6.6

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
8,838 reviews
United Airlines
7.4
Good
8,838 reviews

Crew

8.1

Entertainment

7.0

Boarding

7.7

Comfort

7.3

Overall

7.4

Food

6.6

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Turkish Airlines
7.3
Good
3,879 reviews
United Airlines
7.4
Good
8,838 reviews

Crew

8.1

Entertainment

7.0

Boarding

7.7

Comfort

7.3

Overall

7.4

Food

6.6

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Air Canada
7.1
Good
9,637 reviews
United Airlines
7.4
Good
8,838 reviews

Crew

8.1

Entertainment

7.0

Boarding

7.7

Comfort

7.3

Overall

7.4

Food

6.6

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Lufthansa
6.8
Okay
7,193 reviews
United Airlines
7.4
Good
8,838 reviews

Crew

8.1

Entertainment

7.0

Boarding

7.7

Comfort

7.3

Overall

7.4

Food

6.6

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
British Airways
6.6
Okay
7,071 reviews
United Airlines
7.4
Good
8,838 reviews

Crew

8.1

Entertainment

7.0

Boarding

7.7

Comfort

7.3

Overall

7.4

Food

6.6

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

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 $655. Other airlines that can offer you cheap pricing are Air Canada, from $660, and Turkish Airlines, from $671. These flights start at 23% 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 ($417), British Airways ($502), and Air Canada ($524).

  • 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 $1,192). 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 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapest$552Average$700FlexibilityNo cancel feeOn-time77%
SWISSCheapest$552Average$1,049FlexibilityNo cancel feeOn-time79%
Austrian AirlinesCheapest$667Average$1,069FlexibilityNo cancel feeOn-time78%
United AirlinesCheapest$679Average$889FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$706Average$1,007FlexibilityNo cancel feeOn-time76%
ITA AirwaysCheapest$879Average$1,159FlexibilityNo cancel feeOn-time81%

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