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Washington, D.C.

$439+ Cheap flights from Sofia (SOF) to Washington, D.C. (WAS)

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 10/22. Fares are subject to change and may not be available on all flights or dates of travel.
SOF — WAS
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
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 September 16, 2025.

Round-trip from

$439
(KLM)

Popular in

September

Cheapest in

June

Average price

$901
From Sofia to Washington, D.C. (WAS)
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Highest demand for flights based on searches. 10% potential increase in price ($76 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($20 potential savings vs. average RT price).
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Average for round-trip flights in September 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 September 16, 2025.

This KLM deal was found by Cheapflights users on 9/15. 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 - IAD
1 stop15h 35mMultiple Airlines
Wed 11/126:50 pmIAD - SOF
1 stop12h 15mMultiple Airlines
Deal found 9/15$439
This KLM deal was found by Cheapflights users on 9/16. 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 9/257:00 amSOF - IAD
1 stop15h 35mMultiple Airlines
Thu 10/96:30 pmIAD - SOF
1 stop12h 30mMultiple Airlines
Deal found 9/16$440
This KLM deal was found by Cheapflights users on 9/16. 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 10/77:00 amSOF - IAD
1 stop15h 35mMultiple Airlines
Mon 10/271:00 pmIAD - SOF
2 stops19h 05mMultiple Airlines
Deal found 9/16$444
This Air France deal was found by Cheapflights users on 9/14. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/307:00 amSOF - IAD
1 stop16h 20mAir France
Wed 10/156:30 pmIAD - SOF
1 stop12h 30mAir France
Deal found 9/14$445
This Air France deal was found by Cheapflights users on 9/16. 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.
Fri 9/267:00 amSOF - IAD
1 stop16h 20mAir France
Tue 9/306:30 pmIAD - SOF
1 stop12h 30mAir France
Deal found 9/16$446
This KLM deal was found by Cheapflights users on 9/15. 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 10/217:00 amSOF - IAD
2 stops16h 57mMultiple Airlines
Thu 11/206:50 pmIAD - SOF
1 stop12h 05mMultiple Airlines
Deal found 9/15$449
This KLM deal was found by Cheapflights users on 9/15. 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
Wed 11/122:35 pmBWI - SOF
2 stops16h 30mMultiple Airlines
Deal found 9/15$454
This KLM deal was found by Cheapflights users on 9/15. 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 10/217:00 amSOF - DCA
2 stops17h 10mMultiple Airlines
Wed 11/192:59 pmDCA - SOF
2 stops16h 06mMultiple Airlines
Deal found 9/15$454
This KLM deal was found by Cheapflights users on 9/14. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/17:00 amSOF - IAD
1 stop15h 35mMultiple Airlines
Fri 12/56:50 pmIAD - SOF
1 stop12h 05mMultiple Airlines
Deal found 9/14$456
This Air France deal was found by Cheapflights users on 9/16. 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.
Fri 10/317:00 amSOF - IAD
2 stops18h 18mMultiple Airlines
Fri 11/76:05 pmIAD - SOF
1 stop13h 00mMultiple Airlines
Deal found 9/16$461
This KLM deal was found by Cheapflights users on 9/14. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/17:00 amSOF - IAD
1 stop15h 35mKLM
Sat 12/66:05 pmIAD - SOF
1 stop13h 00mKLM
Deal found 9/14$492
This KLM deal was found by Cheapflights users on 9/15. 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 10/217:00 amSOF - BWI
2 stops16h 54mMultiple Airlines
Wed 11/192:35 pmBWI - SOF
2 stops16h 30mMultiple Airlines
Deal found 9/15$501

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 September 16, 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

Wed 10/22

7:00 am-3:35 pm

1 stop15h 35m

Washington, D.C. Dulles Intl

Wed 11/19

6:50 pm-2:05 pm

1 stop12h 15m

$439

SofiaWashington, D.C.

SOF - IAD

SOFIAD

Sofia

Wed 10/22

7:00 am-3:35 pm

1 stop15h 35m

Washington, D.C. Dulles Intl

Thu 11/20

6:50 pm-1:55 pm

1 stop12h 05m

$439

SofiaWashington, D.C.

SOF - IAD

SOFIAD

Sofia

Thu 10/23

7:00 am-3:35 pm

1 stop15h 35m

Washington, D.C. Dulles Intl

Wed 11/19

6:50 pm-2:05 pm

1 stop12h 15m

$439

SofiaWashington, D.C.

SOF - IAD

SOFIAD

Sofia

Tue 10/7

7:00 am-3:35 pm

1 stop15h 35m

Washington, D.C. Dulles Intl

Mon 10/27

7:50 pm-2:05 pm

1 stop12h 15m

$440

SofiaWashington, D.C.

SOF - IAD

SOFIAD

Sofia

Wed 10/29

7:00 am-5:05 pm

1 stop16h 05m

Washington, D.C. Dulles Intl

Wed 11/5

6:50 pm-2:05 pm

1 stop12h 15m

$440

SofiaWashington, D.C.

SOF - IAD

SOFIAD

Sofia

Fri 10/31

7:00 am-5:05 pm

1 stop16h 05m

Washington, D.C. Dulles Intl

Fri 11/7

6:05 pm-2:05 pm

1 stop13h 00m

$446

SofiaWashington, D.C.

SOF - IAD

SOFIAD

Sofia

Fri 9/26

7:00 am-4:20 pm

1 stop16h 20m

Washington, D.C. Dulles Intl

Tue 9/30

6:30 pm-2:00 pm

1 stop12h 30m

$446

SofiaWashington, D.C.

SOF - IAD

SOFIAD

Sofia

Tue 10/21

7:00 am-4:57 pm

2 stops16h 57m

Washington, D.C. Dulles Intl

Thu 11/20

6:50 pm-1:55 pm

1 stop12h 05m

$449

SofiaBaltimore

SOF - BWI

SOFBWI

Sofia

Wed 10/15

7:00 am-4:54 pm

2 stops16h 54m

Baltimore/Washington

Wed 11/12

2:35 pm-2:05 pm

2 stops16h 30m

$454

SofiaWashington, D.C.

SOF - IAD

SOFIAD

Sofia

Thu 10/2

7:00 am-3:35 pm

1 stop15h 35m

Washington, D.C. Dulles Intl

Thu 12/4

6:50 pm-1:55 pm

1 stop12h 05m

$456

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 52 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 September 12, 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, August is the cheapest month in which you can book a flight from Sofia to Washington, D.C. (average of $292). 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 September 16, 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.

How much does it cost to fly round-trip from Sofia to Washington, D.C.?

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 September 16, 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
1,386 reviews

Food

7.3

Comfort

7.7

Entertainment

7.2

Overall

7.8

Boarding

7.8

Crew

8.4

Reviews

1 / 20
4.0
Okay

Mark,Sep 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.
KLM
7.8
Good
1,386 reviews
KLM
7.8
Good
1,386 reviews

Food

7.3

Comfort

7.7

Entertainment

7.2

Overall

7.8

Boarding

7.8

Crew

8.4

Reviews

1 / 20
4.0
Okay

Mark,Sep 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.
Austrian Airlines
7.6
Good
850 reviews
KLM
7.8
Good
1,386 reviews

Food

7.3

Comfort

7.7

Entertainment

7.2

Overall

7.8

Boarding

7.8

Crew

8.4

Reviews

1 / 20
4.0
Okay

Mark,Sep 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.
United Airlines
7.4
Good
8,924 reviews
KLM
7.8
Good
1,386 reviews

Food

7.3

Comfort

7.7

Entertainment

7.2

Overall

7.8

Boarding

7.8

Crew

8.4

Reviews

1 / 20
4.0
Okay

Mark,Sep 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.
Turkish Airlines
7.3
Good
3,968 reviews
KLM
7.8
Good
1,386 reviews

Food

7.3

Comfort

7.7

Entertainment

7.2

Overall

7.8

Boarding

7.8

Crew

8.4

Reviews

1 / 20
4.0
Okay

Mark,Sep 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.
Lufthansa
6.8
Okay
7,407 reviews
KLM
7.8
Good
1,386 reviews

Food

7.3

Comfort

7.7

Entertainment

7.2

Overall

7.8

Boarding

7.8

Crew

8.4

Reviews

1 / 20
4.0
Okay

Mark,Sep 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.

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 $570, British Airways can have you in Washington, D.C. from Sofia in 28h 20m. Airlines will cover a distance of 4889 mi.

  • 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 23% lower than the current average price 3 months from now.

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

    The cheapest airline one-way is American Airlines, with whom users have recently found tickets for as low as $652. However, be on the lookout for offers from KLM and United Airlines, as they are both options that can get you from Sofia to Washington, D.C. for a low price.

  • 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, August is the cheapest month in which you can book a flight from Sofia to Washington, D.C. (average of $292). 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
Gaithersburg
Fredericksburg
Linthicum Heights
Fairfax
Falls Church
Owings Mills
Manassas
Rockville
Hanover
Oxon Hill
Laurel
Towson
National Harbor
Dundalk

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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 September 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$520Average$601FlexibilityNo cancel feeOn-time75%
LufthansaCheapest$571Average$674FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$584Average$642FlexibilityNo cancel feeOn-time69%
Turkish AirlinesCheapest$614Average$667FlexibilityNo cancel feeOn-time77%

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