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Washington, D.C.

$359+ Cheap flights from Sofia (SOF) to Washington, D.C. (WAS)

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 9/18. Fares are subject to change and may not be available on all flights or dates of travel.
SOF — WAS
Aug 26 — Sep 21
Tue 8/26
Tue 9/2
1 adult, Economy
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Cheapflights Tip: The best prices from Sofia to Washington, D.C. are usually found in June or March, booked 90 days in advance, depart on a Monday or Thursday and return on a Wednesday

Cheap flight deals from Sofia to Washington, D.C.

Discover tips and strategies to find the most affordable flight options for your journey from Sofia (SOF) to Washington, D.C. (WAS). 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 21, 2025.

Round-trip from

$472
(KLM)

One-way from

$359
(Kiwi.com)

Popular in

September

Cheapest in

June

Average price

$634
From Sofia to Washington, D.C. (WAS)
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One-way flight from Sofia to Washington, D.C. (WAS)
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Highest demand for flights based on searches. 1% potential increase in price ($13 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($10 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 Sofia to Washington, D.C.

Cheapest flights from Sofia to Washington, D.C.
Explore the most affordable flight options available from Sofia to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 21, 2025.

This KLM deal was found by Cheapflights users on 8/21. 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 9/47:00 amSOF - IAD
1 stop15h 35mMultiple Airlines
Wed 9/176:30 pmIAD - SOF
1 stop12h 30mMultiple Airlines
Deal found 8/21$472
This KLM deal was found by Cheapflights users on 8/21. 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.
Sat 10/47:00 amSOF - IAD
1 stop15h 35mMultiple Airlines
Wed 10/156:30 pmIAD - SOF
1 stop12h 30mMultiple Airlines
Deal found 8/21$473
This KLM deal was found by Cheapflights users on 8/20. 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.
Tue 10/147:00 amSOF - IAD
1 stop15h 35mMultiple Airlines
Wed 11/126:50 pmIAD - SOF
1 stop12h 15mMultiple Airlines
Deal found 8/20$474
This KLM deal was found by Cheapflights users on 8/21. 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.
Sat 10/47:00 amSOF - IAD
1 stop15h 35mMultiple Airlines
Fri 10/179:20 pmIAD - SOF
1 stop33h 40mMultiple Airlines
Deal found 8/21$475
This Air France deal was found by Cheapflights users on 8/21. 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 France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/277:00 amSOF - IAD
1 stop19h 15mAir France
Sat 11/156:50 pmIAD - SOF
1 stop12h 05mAir France
Deal found 8/21$479
This KLM deal was found by Cheapflights users on 8/21. 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 9/47:00 amSOF - DCA
2 stops17h 05mKLM
Wed 9/172:50 pmDCA - SOF
2 stops16h 10mKLM
Deal found 8/21$483
This KLM deal was found by Cheapflights users on 8/21. 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.
Mon 10/67:00 amSOF - IAD
2 stops16h 57mMultiple Airlines
Wed 10/156:30 pmIAD - SOF
1 stop12h 30mMultiple Airlines
Deal found 8/21$484
This KLM deal was found by Cheapflights users on 8/21. 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.
Mon 10/67:00 amSOF - IAD
2 stops16h 57mMultiple Airlines
Fri 10/179:20 pmIAD - SOF
1 stop33h 40mMultiple Airlines
Deal found 8/21$485
This KLM deal was found by Cheapflights users on 8/20. 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.
Tue 10/147:00 amSOF - BWI
2 stops16h 54mMultiple Airlines
Tue 11/113:30 pmBWI - SOF
2 stops15h 25mMultiple Airlines
Deal found 8/20$489
This KLM deal was found by Cheapflights users on 8/20. 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.
Wed 10/157:00 amSOF - BWI
2 stops16h 54mMultiple Airlines
Tue 11/113:30 pmBWI - SOF
2 stops15h 25mMultiple Airlines
Deal found 8/20$517
This FlightHub deal was found by Cheapflights users on 8/20. 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 9/173:35 pmSOF - IAD
1 stop27h 10mTurkish Airlines
Thu 10/161:30 pmIAD - SOF
1 stop18h 15mTurkish Airlines
Deal found 8/20$525
This Air France deal was found by Cheapflights users on 8/21. 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 France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/47:00 amSOF - IAD
1 stop16h 20mAir France
Wed 9/176:30 pmIAD - SOF
1 stop12h 30mAir France
Deal found 8/21$557

Cheapflights Fare Finder

 
Customize your flight search to find flights from Sofia to Washington, D.C. 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 21, 2025.
Use the filters below to find and compare flights from Sofia to Washington, D.C. that are best for you.

Fly from

Sofia

Fly to

Washington, D.C.

Route

Depart

Return

Price

SofiaWashington, D.C.

SOF - IAD

SOFIAD

Sofia

Thu 9/4

7:00 am-3:35 pm

1 stop15h 35m

Washington, D.C. Dulles Intl

Wed 9/17

6:30 pm-2:00 pm

1 stop12h 30m

$472

SofiaWashington, D.C.

SOF - IAD

SOFIAD

Sofia

Fri 10/10

7:00 am-3:35 pm

1 stop15h 35m

Washington, D.C. Dulles Intl

Tue 10/14

6:30 pm-2:00 pm

1 stop12h 30m

$473

SofiaWashington, D.C.

SOF - IAD

SOFIAD

Sofia

Sat 10/4

7:00 am-3:35 pm

1 stop15h 35m

Washington, D.C. Dulles Intl

Wed 10/15

6:30 pm-2:00 pm

1 stop12h 30m

$473

SofiaWashington, D.C.

SOF - IAD

SOFIAD

Sofia

Sun 10/5

7:00 am-3:35 pm

1 stop15h 35m

Washington, D.C. Dulles Intl

Wed 10/15

6:30 pm-2:00 pm

1 stop12h 30m

$473

SofiaWashington, D.C.

SOF - IAD

SOFIAD

Sofia

Sat 10/4

7:00 am-3:35 pm

1 stop15h 35m

Washington, D.C. Dulles Intl

Thu 10/16

6:30 pm-2:00 pm

1 stop12h 30m

$473

SofiaWashington, D.C.

SOF - IAD

SOFIAD

Sofia

Mon 10/6

7:00 am-3:35 pm

1 stop15h 35m

Washington, D.C. Dulles Intl

Thu 10/16

6:30 pm-2:00 pm

1 stop12h 30m

$473

SofiaWashington, D.C.

SOF - IAD

SOFIAD

Sofia

Wed 9/17

7:00 am-3:35 pm

1 stop15h 35m

Washington, D.C. Dulles Intl

Thu 10/16

6:30 pm-2:00 pm

1 stop12h 30m

$473

SofiaWashington, D.C.

SOF - IAD

SOFIAD

Sofia

Sun 10/5

7:00 am-3:35 pm

1 stop15h 35m

Washington, D.C. Dulles Intl

Thu 10/16

6:30 pm-2:00 pm

1 stop12h 30m

$473

SofiaWashington, D.C.

SOF - IAD

SOFIAD

Sofia

Mon 10/6

7:00 am-3:35 pm

1 stop15h 35m

Washington, D.C. Dulles Intl

Wed 10/15

6:30 pm-2:00 pm

1 stop12h 30m

$473

SofiaWashington, D.C.

SOF - IAD

SOFIAD

Sofia

Tue 10/14

7:00 am-3:35 pm

1 stop15h 35m

Washington, D.C. Dulles Intl

Tue 11/11

6:50 pm-1:55 pm

1 stop12h 05m

$474

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/20

Showing 1-10 of 39 results
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Best time to book a flight from Sofia to Washington, D.C.

Have a flexible travel schedule? Discover the best time to fly to Washington, D.C. 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.

How far ahead should I book a flight from Sofia to Washington, D.C.?

Use this chart to determine the optimal time to book a round-trip flight from Sofia to Washington, D.C.. Price data was last updated on August 8, 2025.

The best time to book flights from Sofia to Washington, D.C. is 90 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, July is the cheapest month in which you can book a flight from Sofia to Washington, D.C. (average of $303). Flying from Sofia to Washington, D.C. 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 WAS?

Find hourly flight availability from Sofia to Washington, D.C.. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 21, 2025.

When flying from Sofia to Washington, D.C., the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 10% versus a flight in the morning.

What’s the top layover airport for flights from Sofia to Washington, D.C.?

Share of 1-stop round-trip flights from Sofia to Washington, D.C. chosen by Cheapflights users in the past 12 months, using the same layover each way.

Amsterdam (AMS) – chosen by Cheapflights users on 75% of 1-stop itineraries from Sofia to Washington, D.C. on Cheapflights.

What’s the cheapest layover airport for flights from Sofia to Washington, D.C.?

Average round-trip fare for 1-stop flights from Sofia to Washington, D.C., chosen by Cheapflights users in the past 12 months, with the same layover each way.

Amsterdam (AMS) is the most affordable 1-stop option, with an average round-trip price of $612.

What’s the fastest layover option from Sofia to Washington, D.C.?

Shortest average travel time for 1-stop one-way flights from Sofia to Washington, D.C., based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Amsterdam (AMS) have the shortest average one-way travel time for 1-stop routes: 15h 45m.

Which airport typically offers the quickest layover for flights from Sofia to Washington, D.C.?

Average layover duration for 1-stop one-way flights from Sofia to Washington, D.C., chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Amsterdam (AMS) offer the fastest connection on this route, with an average layover time of 3h 38m.

Reviews of airlines servicing Washington, D.C.

Get insights into the airlines that provide service to Washington, D.C.. 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 Washington, D.C.. Reviews last updated August 21, 2025.
Get a feel of what it's like to fly with KLM, Austrian Airlines, and United Airlines from Sofia to Washington, D.C. by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.8
Good
1,388 reviews

Comfort

7.7

Overall

7.8

Crew

8.4

Entertainment

7.1

Food

7.3

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
1,388 reviews
KLM
7.8
Good
1,388 reviews

Comfort

7.7

Overall

7.8

Crew

8.4

Entertainment

7.1

Food

7.3

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
832 reviews
KLM
7.8
Good
1,388 reviews

Comfort

7.7

Overall

7.8

Crew

8.4

Entertainment

7.1

Food

7.3

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
8,930 reviews
KLM
7.8
Good
1,388 reviews

Comfort

7.7

Overall

7.8

Crew

8.4

Entertainment

7.1

Food

7.3

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.
Turkish Airlines
7.3
Good
3,950 reviews
KLM
7.8
Good
1,388 reviews

Comfort

7.7

Overall

7.8

Crew

8.4

Entertainment

7.1

Food

7.3

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.
Lufthansa
6.8
Okay
7,344 reviews
KLM
7.8
Good
1,388 reviews

Comfort

7.7

Overall

7.8

Crew

8.4

Entertainment

7.1

Food

7.3

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 Washington, D.C.. 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.?

    If you book a flight to Washington, D.C. from Sofia, you will be flying from Sofia, which is the city’s only airport. Sofia (SOF) is located 4.2 mi from the center of Sofia. There are 0 flights from Sofia to Washington, D.C. per day from 4 different airlines.

  • How long is the flight from Sofia to Washington, D.C.?

    For as low as $584, KLM can have you in Washington, D.C. from Sofia in 16h 36m. Airlines will cover a distance of 4919 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    KLM, at $520, was found to be the cheapest airline from Sofia to Washington, D.C..Alternate airlines to your destination round-trip include Lufthansa and United Airlines. These flights start at 21% lower than the current average price 3 months from now.

  • What are the most popular routes from Sofia to Washington, D.C.?

    The most popular flight routes from Sofia to Washington, D.C. are Sofia - Washington, D.C. Dulles Intl, Sofia - Washington, D.C. Reagan-National and Sofia - Baltimore/Washington.

  • Can I find deals for flights from Sofia to Washington, D.C. that include hotel bookings?

    Yes. In addition to deals on Sofia to Washington, D.C. flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Sofia to Washington, D.C.?

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

  • Can I find deals for business class flights from Sofia to Washington, D.C.?

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

    Currently, July is the cheapest month in which you can book a flight from Sofia to Washington, D.C. (average of $303). Flying from Sofia to Washington, D.C. 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.?

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

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Sofia to Washington, D.C.

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

Top 4 airlines flying from Sofia to Washington, D.C.

Discover the top 4 airlines that operate flights from Sofia to Washington, D.C.. 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 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$520Average$601FlexibilityNo cancel feeOn-time75%
LufthansaCheapest$572Average$685FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$584Average$647FlexibilityNo cancel feeOn-time69%
Turkish AirlinesCheapest$614Average$665FlexibilityNo cancel feeOn-time77%

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