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Washington, D.C.

$518+ 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 12/11. Fares are subject to change and may not be available on all flights or dates of travel.
SOF — WAS
Nov 22 — Nov 291
Sat 11/22
Sat 11/29
1 adult, Economy
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1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

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3. Compare prices and book

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Cheapflights Tip: The best prices from Sofia to Washington, D.C. are usually found in June or September, 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 October 23, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$518
(KLM)

Popular in

July

Cheapest in

June

Average price

$713
Provider with most accurate pricing for Sofia-Washington, D.C. (WAS) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Sofia-Washington, D.C. (WAS) flights.
Search Deals
From Sofia to Washington, D.C. (WAS)
Search Deals
Highest demand for flights based on searches. 2% potential increase in price ($16 potential increase over avg. RT price).
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Cheapest flight prices on average. 0% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 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 October 23, 2025.

This KLM deal was found by Cheapflights users on 10/21. 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 12/117:00 amSOF - IAD
1 stop16h 05mMultiple Airlines
Thu 1/226:50 pmIAD - SOF
1 stop12h 05mMultiple Airlines
Deal found 10/21$518
This KLM deal was found by Cheapflights users on 10/22. 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.
Sun 11/97:00 amSOF - IAD
1 stop16h 05mMultiple Airlines
Sun 11/166:50 pmIAD - SOF
1 stop12h 05mMultiple Airlines
Deal found 10/22$519
This KLM deal was found by Cheapflights users on 10/20. 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.
Fri 12/57:00 amSOF - IAD
1 stop16h 05mMultiple Airlines
Fri 1/236:50 pmIAD - SOF
1 stop12h 05mMultiple Airlines
Deal found 10/20$520
This KLM deal was found by Cheapflights users on 10/21. 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.
Tue 11/47:00 amSOF - IAD
1 stop16h 05mMultiple Airlines
Tue 11/1112:36 pmIAD - SOF
2 stops18h 19mMultiple Airlines
Deal found 10/21$523
This KLM deal was found by Cheapflights users on 10/21. 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 12/117:00 amSOF - IAD
1 stop16h 05mKLM
Fri 1/233:00 pmIAD - SOF
2 stops16h 05mKLM
Deal found 10/21$529
This KLM deal was found by Cheapflights users on 10/20. 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.
Fri 12/57:00 amSOF - IAD
1 stop16h 05mKLM
Fri 1/233:00 pmIAD - SOF
2 stops16h 05mKLM
Deal found 10/20$530
This KLM deal was found by Cheapflights users on 10/21. 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 12/117:00 amSOF - DCA
2 stops17h 05mMultiple Airlines
Sat 1/242:30 pmDCA - SOF
2 stops16h 25mMultiple Airlines
Deal found 10/21$533
This KLM deal was found by Cheapflights users on 10/21. 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 11/207:00 amSOF - IAD
2 stops18h 19mKLM
Thu 11/271:00 pmIAD - SOF
2 stops18h 05mKLM
Deal found 10/21$539
This KLM deal was found by Cheapflights users on 10/21. 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 12/117:00 amSOF - DCA
2 stops17h 59mKLM
Thu 1/223:10 pmDCA - SOF
2 stops15h 55mKLM
Deal found 10/21$539
This KLM deal was found by Cheapflights users on 10/20. 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.
Fri 12/57:00 amSOF - DCA
2 stops17h 59mKLM
Fri 1/233:10 pmDCA - SOF
2 stops15h 55mKLM
Deal found 10/20$540
This Air France deal was found by Cheapflights users on 10/22. 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 12/197:00 amSOF - IAD
1 stop19h 15mAir France
Fri 1/236:50 pmIAD - SOF
1 stop12h 05mAir France
Deal found 10/22$543
This KLM deal was found by Cheapflights users on 10/23. 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 10/307:00 amSOF - IAD
1 stop16h 05mMultiple Airlines
Mon 11/246:50 pmIAD - SOF
1 stop12h 15mMultiple Airlines
Deal found 10/23$553

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 October 23, 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 12/10

7:00 am-4:05 pm

1 stop16h 05m

Washington, D.C. Dulles Intl

Fri 1/23

6:50 pm-1:55 pm

1 stop12h 05m

$518

SofiaWashington, D.C.

SOF - IAD

SOFIAD

Sofia

Thu 12/11

7:00 am-4:05 pm

1 stop16h 05m

Washington, D.C. Dulles Intl

Sat 1/24

6:50 pm-1:55 pm

1 stop12h 05m

$518

SofiaWashington, D.C.

SOF - IAD

SOFIAD

Sofia

Fri 12/5

7:00 am-4:05 pm

1 stop16h 05m

Washington, D.C. Dulles Intl

Fri 1/23

6:50 pm-1:55 pm

1 stop12h 05m

$520

SofiaWashington, D.C.

SOF - IAD

SOFIAD

Sofia

Thu 12/11

7:00 am-4:05 pm

1 stop16h 05m

Washington, D.C. Dulles Intl

Fri 1/23

3:00 pm-2:05 pm

2 stops16h 05m

$529

SofiaWashington, D.C.

SOF - IAD

SOFIAD

Sofia

Fri 12/5

7:00 am-4:05 pm

1 stop16h 05m

Washington, D.C. Dulles Intl

Fri 1/23

3:00 pm-2:05 pm

2 stops16h 05m

$530

SofiaWashington, D.C.

SOF - DCA

SOFDCA

Sofia

Fri 12/12

7:00 am-5:05 pm

2 stops17h 05m

Washington, D.C. Reagan-National

Sat 1/24

2:30 pm-1:55 pm

2 stops16h 25m

$533

SofiaWashington, D.C.

SOF - DCA

SOFDCA

Sofia

Sat 12/13

7:00 am-6:02 pm

2 stops18h 02m

Washington, D.C. Reagan-National

Sat 1/24

2:30 pm-1:55 pm

2 stops16h 25m

$533

SofiaWashington, D.C.

SOF - IAD

SOFIAD

Sofia

Thu 11/20

7:00 am-6:19 pm

2 stops18h 19m

Washington, D.C. Dulles Intl

Thu 11/27

1:00 pm-2:05 pm

2 stops18h 05m

$539

SofiaWashington, D.C.

SOF - DCA

SOFDCA

Sofia

Sat 12/13

7:00 am-6:02 pm

2 stops18h 02m

Washington, D.C. Reagan-National

Fri 1/23

3:10 pm-2:05 pm

2 stops15h 55m

$539

SofiaWashington, D.C.

SOF - DCA

SOFDCA

Sofia

Fri 12/12

7:00 am-5:05 pm

2 stops17h 05m

Washington, D.C. Reagan-National

Fri 1/23

3:10 pm-2:05 pm

2 stops15h 55m

$539

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/21

Showing 1-10 of 43 results
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Compare providers for flights from Sofia to Washington, D.C.

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Sofia to Washington, D.C. in October.
ProviderPrice AccuracyTrust Score*
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Sofia-Washington, D.C. flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Sofia-Washington, D.C. flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Sofia-Washington, D.C. flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Sofia-Washington, D.C. flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Sofia-Washington, D.C. flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 October 17, 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, October is the cheapest month in which you can book a flight from Sofia to Washington, D.C. (average of $492). Flying from Sofia to Washington, D.C. in December is currently the most expensive (average of $638). 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 October 23, 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 21% versus a flight in the evening.

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 October 23, 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
7.7
Good
1,405 reviews

Entertainment

7.1

Food

7.3

Comfort

7.6

Overall

7.7

Crew

8.4

Boarding

7.8

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
KLM
7.7
Good
1,405 reviews
KLM
7.7
Good
1,405 reviews

Entertainment

7.1

Food

7.3

Comfort

7.6

Overall

7.7

Crew

8.4

Boarding

7.8

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
Austrian Airlines
7.6
Good
863 reviews
KLM
7.7
Good
1,405 reviews

Entertainment

7.1

Food

7.3

Comfort

7.6

Overall

7.7

Crew

8.4

Boarding

7.8

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
United Airlines
7.4
Good
8,995 reviews
KLM
7.7
Good
1,405 reviews

Entertainment

7.1

Food

7.3

Comfort

7.6

Overall

7.7

Crew

8.4

Boarding

7.8

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
Turkish Airlines
7.3
Good
4,023 reviews
KLM
7.7
Good
1,405 reviews

Entertainment

7.1

Food

7.3

Comfort

7.6

Overall

7.7

Crew

8.4

Boarding

7.8

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
Lufthansa
6.8
Okay
7,518 reviews
KLM
7.7
Good
1,405 reviews

Entertainment

7.1

Food

7.3

Comfort

7.6

Overall

7.7

Crew

8.4

Boarding

7.8

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.

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 $529, KLM can have you in Washington, D.C. from Sofia in 16h 05m. Airlines will cover a distance of 4931 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 - Baltimore/Washington and Sofia - Washington, D.C. Reagan-National.

  • 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, October is the cheapest month in which you can book a flight from Sofia to Washington, D.C. (average of $492). Flying from Sofia to Washington, D.C. in December is currently the most expensive (average of $638). 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
Alexandria
Woodbridge
Tysons
Arlington
Springfield
Silver Spring
Hanover
Gaithersburg
Fredericksburg
Fairfax
Linthicum Heights
Falls Church
Owings Mills
Manassas
Largo
Oxon Hill
Laurel
Towson
National Harbor
Waldorf

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 October 23, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$520Average$601FlexibilityNo cancel feeOn-time75%
LufthansaCheapest$572Average$651FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$588Average$641FlexibilityNo cancel feeOn-time69%
Turkish AirlinesCheapest$614Average$667FlexibilityNo cancel feeOn-time77%

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