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Dulles Intl

$365+ Cheap flights from Sofia (SOF) to Dulles Intl (IAD)

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 9/29. Fares are subject to change and may not be available on all flights or dates of travel.
SOF — IAD
Aug 3 — Aug 101
Sun 8/3
Sun 8/10
1 adult, Economy
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Cheap flight deals from Sofia to Dulles Intl

Discover tips and strategies to find the most affordable flight options for your journey from Sofia (SOF) to Dulles Intl (IAD). 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 July 29, 2025.

Round-trip from

$499
(KLM)

One-way from

$365
(Mytrip)

Popular in

December

Cheapest in

November

Average price

$687
From Sofia to Washington, D.C. Dulles Intl
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One-way flight from Sofia to Washington, D.C. Dulles Intl
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Highest demand for flights based on searches. 5% potential increase in price ($40 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($26 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find flight deals from Sofia to Dulles Intl

Cheapest flights from Sofia to Dulles Intl
Explore the most affordable flight options available from Sofia to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.

This KLM deal was found by Cheapflights users on 7/29. 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.
Fri 9/57:00 amSOF - IAD
1 stop15h 35mMultiple Airlines
Fri 9/196:30 pmIAD - SOF
1 stop12h 30mMultiple Airlines
Deal found 7/29$499
This KLM deal was found by Cheapflights users on 7/28. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/187:00 amSOF - IAD
1 stop15h 35mKLM
Sat 9/275:25 pmIAD - SOF
1 stop13h 35mKLM
Deal found 7/28$505
This Turkish Airlines deal was found by Cheapflights users on 7/28. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/53:35 pmSOF - IAD
1 stop35h 10mTurkish Airlines
Fri 9/199:40 pmIAD - SOF
1 stop27h 55mTurkish Airlines
Deal found 7/28$563
This United Airlines deal was found by Cheapflights users on 7/27. 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.
Fri 10/36:15 amSOF - IAD
2 stops16h 42mUnited Airlines
Fri 12/55:40 pmIAD - SOF
1 stop12h 30mUnited Airlines
Deal found 7/27$598
This Lufthansa deal was found by Cheapflights users on 7/28. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/116:00 amSOF - IAD
2 stops16h 50mLufthansa
Thu 9/2510:20 pmIAD - SOF
1 stop13h 20mLufthansa
Deal found 7/28$612
This SWISS deal was found by Cheapflights users on 7/28. 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.
Thu 9/1110:50 amSOF - IAD
1 stop12h 25mSWISS
Thu 9/186:40 pmIAD - SOF
2 stops32h 25mSWISS
Deal found 7/28$616
This American Airlines deal was found by Cheapflights users on 7/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/32:20 pmSOF - IAD
2 stops31h 40mAmerican Airlines
Fri 12/55:54 pmIAD - SOF
2 stops36h 06mAmerican Airlines
Deal found 7/27$648
This KLM deal was found by Cheapflights users on 7/29. 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.
Thu 8/77:00 amSOF - IAD
1 stop19h 15mAir France
Thu 8/219:20 pmIAD - SOF
1 stop33h 40mAir France
Deal found 7/29$652
This Austrian Airlines deal was found by Cheapflights users on 7/28. 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 Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/126:55 pmSOF - IAD
2 stops26h 30mAustrian Airlines
Thu 6/255:25 pmIAD - SOF
1 stop17h 45mAustrian Airlines
Deal found 7/28$700

Cheapflights Fare Finder

 
Customize your flight search to find flights from Sofia to Dulles Intl 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 July 29, 2025.
Use the filters below to find and compare flights from Sofia to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Sofia

Fly to

Dulles Intl

Route

Depart

Return

Price

SofiaWashington, D.C.

SOF - IAD

SOFIAD

Sofia

Fri 9/5

7:00 am-3:35 pm

1 stop15h 35m

Washington, D.C. Dulles Intl

Fri 9/19

6:30 pm-2:00 pm

1 stop12h 30m

$499

SofiaWashington, D.C.

SOF - IAD

SOFIAD

Sofia

Thu 9/18

7:00 am-3:35 pm

1 stop15h 35m

Washington, D.C. Dulles Intl

Sat 9/27

5:25 pm-2:00 pm

1 stop13h 35m

$505

SofiaWashington, D.C.

SOF - IAD

SOFIAD

Sofia

Fri 9/5

3:35 pm-7:45 pm

1 stop35h 10m

Washington, D.C. Dulles Intl

Fri 9/19

9:40 pm-8:35 am

1 stop27h 55m

$563

SofiaWashington, D.C.

SOF - IAD

SOFIAD

Sofia

Fri 10/3

6:15 am-3:57 pm

2 stops16h 42m

Washington, D.C. Dulles Intl

Fri 12/5

5:40 pm-1:10 pm

1 stop12h 30m

$598

SofiaWashington, D.C.

SOF - IAD

SOFIAD

Sofia

Thu 9/11

6:00 am-3:50 pm

2 stops16h 50m

Washington, D.C. Dulles Intl

Thu 9/25

10:20 pm-6:40 pm

1 stop13h 20m

$612

SofiaWashington, D.C.

SOF - IAD

SOFIAD

Sofia

Thu 9/11

10:50 am-4:15 pm

1 stop12h 25m

Washington, D.C. Dulles Intl

Thu 9/18

6:40 pm-10:05 am

2 stops32h 25m

$616

SofiaWashington, D.C.

SOF - IAD

SOFIAD

Sofia

Fri 10/3

2:20 pm-3:00 pm

2 stops31h 40m

Washington, D.C. Dulles Intl

Fri 12/5

5:54 pm-1:00 pm

2 stops36h 06m

$648

SofiaWashington, D.C.

SOF - IAD

SOFIAD

Sofia

Mon 8/11

12:25 pm-3:25 pm

2 stops34h 00m

Washington, D.C. Dulles Intl

Sat 3/28

7:00 pm-5:10 pm

1 stop16h 10m

$692

SofiaWashington, D.C.

SOF - IAD

SOFIAD

Sofia

Mon 9/29

6:45 pm-8:50 pm

2 stops33h 05m

$365

SofiaWashington, D.C.

SOF - IAD

SOFIAD

Sofia

Sat 9/13

6:15 am-1:30 pm

1 stop14h 15m

$571

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/26

Showing 1-10 of 17 results
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Best time to book a flight from Sofia to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Sofia 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 Sofia to Washington, D.C. Dulles Intl Airport

What is the cheapest month to book a flight from Sofia to Washington, D.C. Dulles Intl Airport?

Currently, July is the cheapest month in which you can book a flight from Sofia to Washington, D.C. Dulles Intl Airport (average of $306). Flying from Sofia to Washington, D.C. Dulles Intl Airport in April is currently the most expensive (average of $337). 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 SOF to IAD?

Find hourly flight availability from Sofia to Dulles Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 29, 2025.

It’s typically best to fly out from Sofia to Washington, D.C. Dulles Intl Airport in the evening. Doing so could potentially save you 17% on the flight price compared to flying in the morning, which is usually more expensive.

Reviews of airlines servicing Dulles Intl

Get insights into the airlines that provide service to Dulles Intl. 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 Dulles Intl. Reviews last updated July 29, 2025.
Peruse reviews from past customers who have flown with KLM, Austrian Airlines, and SWISS from Sofia to Washington, D.C. Dulles Intl Airport to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.8
Good
1,383 reviews

Crew

8.4

Overall

7.8

Food

7.3

Comfort

7.7

Entertainment

7.1

Boarding

7.8

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
KLM
7.8
Good
1,383 reviews
KLM
7.8
Good
1,383 reviews

Crew

8.4

Overall

7.8

Food

7.3

Comfort

7.7

Entertainment

7.1

Boarding

7.8

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
Austrian Airlines
7.6
Good
821 reviews
KLM
7.8
Good
1,383 reviews

Crew

8.4

Overall

7.8

Food

7.3

Comfort

7.7

Entertainment

7.1

Boarding

7.8

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
SWISS
7.5
Good
1,683 reviews
KLM
7.8
Good
1,383 reviews

Crew

8.4

Overall

7.8

Food

7.3

Comfort

7.7

Entertainment

7.1

Boarding

7.8

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
Qatar Airways
7.4
Good
3,609 reviews
KLM
7.8
Good
1,383 reviews

Crew

8.4

Overall

7.8

Food

7.3

Comfort

7.7

Entertainment

7.1

Boarding

7.8

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
United Airlines
7.4
Good
8,896 reviews
KLM
7.8
Good
1,383 reviews

Crew

8.4

Overall

7.8

Food

7.3

Comfort

7.7

Entertainment

7.1

Boarding

7.8

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

Related info for your journey

Find useful and relevant information for your journey from Sofia to Dulles Intl. 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 from for flights from Sofia to Washington, D.C. Dulles Intl?

    Sofia (SOF), located 4.2 mi from the city center, is the airport you fly out of when you book flights from Sofia to Washington, D.C. Dulles Intl. 4 airlines have flights from Sofia to Washington, D.C. Dulles Intl on a regular basis. Booking flights from Sofia to Washington, D.C. Dulles Intl should not be difficult; the airport handles an average of 0 outbound flights to Washington, D.C. Dulles Intl per day.

  • What are the cheapest airlines flying from Sofia to Washington, D.C. Dulles Intl Airport round-trip?

    Currently priced at $505, KLM will fly you from Sofia to Washington, D.C. Dulles Intl Airport and back. In addition to KLM, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Turkish Airlines and United Airlines - these airlines can fly you to your destination from $563 and $598, respectively. These flights start at 24% lower than the current average price 3 months from now.

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

    The cheapest airlines for a one-way flight from Sofia to Washington, D.C. Dulles Intl Airport are Lufthansa ($571), Austrian Airlines ($573), and Qatar Airways ($589).

  • Can I find deals for flights from Sofia to Dulles Intl that include hotel bookings?

    Yes. In addition to deals on Sofia to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Sofia to Dulles Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Sofia to Dulles Intl.

  • Can I find deals for business class flights from Sofia to Dulles Intl?

    Yes. Cheapflights offers flight deals from Sofia to Dulles Intl 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 Sofia to Washington, D.C. Dulles Intl Airport?

    Currently, July is the cheapest month in which you can book a flight from Sofia to Washington, D.C. Dulles Intl Airport (average of $306). Flying from Sofia to Washington, D.C. Dulles Intl Airport in April is currently the most expensive (average of $337). 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

Traveling to a place near Washington, D.C. Dulles Intl Airport?

Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locations
Woodbridge
Arlington
Alexandria
Tysons
Silver Spring
Fredericksburg
Gaithersburg
Towson
Linthicum Heights
Easton
Fairfax
Manassas
Falls Church
Waldorf
Laurel
Rockville
Oxon Hill
National Harbor
Dundalk
Bowie

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Alternative routes for Sofia to Dulles Intl

See prices for flight routes from nearby airports that may be better suited for you.
Sofia to Baltimore flights

Top 4 airlines flying from Sofia to Dulles Intl

Discover the top 4 airlines that operate flights from Sofia to Dulles Intl. 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 July 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$520Average$601FlexibilityNo cancel feeOn-time75%
LufthansaCheapest$572Average$686FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$584Average$642FlexibilityNo cancel feeOn-time69%
Turkish AirlinesCheapest$614Average$665FlexibilityNo cancel feeOn-time77%

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