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$300+ Cheap flights from Washington, D.C. (WAS) 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 7/6. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — SOF
May 28 — Jun 41
Wed 5/28
Wed 6/4
1 adult, Economy
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Cheapflights Tip: The best prices from Washington, D.C. to Sofia are usually found in November or February, booked 10 days in advance, depart on a Wednesday or Sunday and return on a Monday

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

Discover tips and strategies to find the most affordable flight options for your journey from Washington, D.C. (WAS) 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 May 23, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$724
(Lufthansa)

One-way from

$300
(Kiwi.com)

Popular in

June

Cheapest in

November

Average price

$861
Provider with most accurate pricing for Washington, D.C. (WAS)-Sofia flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-Sofia flights.
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From Washington, D.C. (WAS) to Sofia
Search Deals
One-way flight from Washington, D.C. (WAS) to Sofia
Search Deals
Highest demand for flights based on searches. 18% potential increase in price ($192 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($28 potential savings vs. average RT price).
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Average for round-trip flights in May 2025
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Find flight deals from Washington, D.C. to Sofia

Cheapest flights from Washington, D.C. to Sofia
Explore the most affordable flight options available from Washington, D.C. to Sofia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 23, 2025.

This British Airways deal was found by Cheapflights users on 5/22. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/182:07 pmBWI - SOF
2 stops17h 03mBritish Airways
Tue 12/26:05 pmSOF - BWI
2 stops28h 47mBritish Airways
Deal found 5/22$574
This United Airlines deal was found by Cheapflights users on 5/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/75:20 pmBWI - SOF
2 stops18h 20mUnited Airlines
Thu 10/236:00 amSOF - BWI
2 stops22h 32mUnited Airlines
Deal found 5/21$628
This SWISS deal was found by Cheapflights users on 5/21. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/58:45 pmIAD - SOF
1 stop32h 45mSWISS
Sat 10/2510:50 amSOF - IAD
1 stop12h 25mSWISS
Deal found 5/21$723
This Lufthansa deal was found by Cheapflights users on 5/22. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/110:20 pmIAD - SOF
2 stops17h 30mLufthansa
Sun 8/247:25 pmSOF - IAD
1 stop31h 00mLufthansa
Deal found 5/22$724
This Gurufare deal was found by Cheapflights users on 5/21. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/219:20 pmBWI - SOF
1 stop18h 55mMultiple Airlines
Tue 11/46:05 pmSOF - BWI
1 stop31h 40mMultiple Airlines
Deal found 5/21$734
This Air Canada deal was found by Cheapflights users on 5/21. 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 Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/48:40 pmDCA - SOF
2 stops31h 35mAir Canada
Sat 10/256:15 amSOF - DCA
2 stops18h 49mAir Canada
Deal found 5/21$734
This Justfly.com deal was found by Cheapflights users on 5/22. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/1510:20 pmIAD - SOF
1 stop17h 40mMultiple Airlines
Wed 8/138:00 amSOF - IAD
2 stops34h 10mMultiple Airlines
Deal found 5/22$734
This United Airlines deal was found by Cheapflights users on 5/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/810:20 pmIAD - SOF
2 stops17h 30mUnited Airlines
Wed 8/206:15 amSOF - IAD
2 stops17h 00mUnited Airlines
Deal found 5/21$741
This Expedia deal was found by Cheapflights users on 5/21. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/2810:40 pmIAD - SOF
1 stop31h 50mBritish Airways
Wed 6/119:30 pmSOF - IAD
1 stop25h 20mBritish Airways
Deal found 5/21$746
This Air Canada deal was found by Cheapflights users on 5/21. 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 Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/289:45 amIAD - SOF
2 stops25h 05mAir Canada
Tue 6/106:20 amSOF - IAD
2 stops16h 59mAir Canada
Deal found 5/21$751
This Austrian Airlines deal was found by Cheapflights users on 5/21. 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 Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/135:25 pmIAD - SOF
1 stop14h 55mAustrian Airlines
Fri 7/258:00 amSOF - IAD
1 stop13h 35mAustrian Airlines
Deal found 5/21$764
This Turkish Airlines deal was found by Cheapflights users on 5/21. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/41:30 pmIAD - SOF
1 stop23h 55mTurkish Airlines
Sat 10/253:35 pmSOF - IAD
1 stop27h 35mTurkish Airlines
Deal found 5/21$771

Cheapflights Fare Finder

Customize your flight search to find flights from Washington, D.C. 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 May 23, 2025.
Use the filters below to find and compare flights from Washington, D.C. to Sofia that are best for you.

Fly from

Washington, D.C.

Fly to

Sofia

Route

Depart

Return

Price

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

Sun 10/5

8:45 pm-12:30 pm

1 stop32h 45m

Sofia

Sat 10/25

10:50 am-4:15 pm

1 stop12h 25m

$723

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

Fri 8/1

10:20 pm-10:50 pm

2 stops17h 30m

Sofia

Sun 8/24

7:25 pm-7:25 pm

1 stop31h 00m

$724

Washington, D.C.Sofia

DCA - SOF

DCASOF

Washington, D.C. Reagan-National

Sat 10/4

8:40 pm-11:15 am

2 stops31h 35m

Sofia

Sat 10/25

6:15 am-6:04 pm

2 stops18h 49m

$734

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

Tue 7/15

10:20 pm-11:00 pm

1 stop17h 40m

Sofia

Wed 8/13

8:00 am-11:10 am

2 stops34h 10m

$734

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

Fri 8/8

10:20 pm-10:50 pm

2 stops17h 30m

Sofia

Wed 8/20

6:15 am-4:15 pm

2 stops17h 00m

$741

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

Tue 7/15

7:25 pm-8:40 pm

1 stop18h 15m

Sofia

Mon 8/11

8:00 pm-3:55 pm

1 stop26h 55m

$747

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

Mon 7/14

5:25 pm-11:40 am

1 stop11h 15m

Sofia

Fri 7/25

8:00 am-2:35 pm

1 stop13h 35m

$757

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

Sat 10/4

1:30 pm-8:25 pm

1 stop23h 55m

Sofia

Sat 10/25

3:35 pm-12:10 pm

1 stop27h 35m

$771

Washington, D.C.Sofia

DCA - SOF

DCASOF

Washington, D.C. Reagan-National

Sun 7/13

6:05 am-12:00 pm

2 stops22h 55m

Sofia

Wed 7/23

12:55 pm-11:35 pm

2 stops17h 40m

$773

Washington, D.C.Sofia

DCA - SOF

DCASOF

Washington, D.C. Reagan-National

Sat 8/16

8:40 pm-11:15 am

2 stops31h 35m

Sofia

Sun 8/31

8:00 am-9:48 pm

2 stops20h 48m

$779

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/20

Showing 1-10 of 38 results
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Compare providers for flights from Washington, D.C. to Sofia

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 Washington, D.C. to Sofia in May.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*2 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice 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 Washington, D.C.-Sofia flights, users find the pricing of AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Washington, D.C.-Sofia flight deals on Cheapflights vs. AranGrant >95% of the time. Price accuracy is based on data collected from Washington, D.C.-Sofia flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Washington, D.C.-Sofia flights, Cheapflights users trust AranGrant the most. AranGrant 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 Washington, D.C.-Sofia 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 Washington, D.C. to Sofia

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

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

Use this chart to determine the optimal time to book a round-trip flight from Washington, D.C. to Sofia. Price data was last updated on May 16, 2025.

Booking 10 days in advance of your planned departure date is, on average, the best time to get cheap flights from Washington, D.C. 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. to Sofia?

Currently, November is the cheapest month in which you can book a flight from Washington, D.C. to Sofia (average of $632). Flying from Washington, D.C. to Sofia in June is currently the most expensive (average of $1,208). 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 WAS to SOF?

Find hourly flight availability from Washington, D.C. 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 May 23, 2025.

One of the essential ways to save on airfare from Washington, D.C. to Sofia is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight at noon could potentially save you up to 41% on airfare.

Rainfall in Sofia by month

Plan your trip to Sofia by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Sofia ranges from 1.2 - 2.8 inches per month. June is typically the wettest month, when rainfall can reach 2.8 in. January is typically the driest time to visit Sofia when rainfall is around 1.2 in.

Temperature in Sofia by month

Plan your trip to Sofia by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Sofia, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 68.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 30.2 F).

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 May 23, 2025.
Read through reviews of airlines operating flights from Washington, D.C. to Sofia, such as KLM, LOT and Austrian Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.8
Good
1,346 reviews

Boarding

7.8

Crew

8.4

Food

7.3

Entertainment

7.1

Overall

7.8

Comfort

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
KLM
7.8
Good
1,346 reviews
KLM
7.8
Good
1,346 reviews

Boarding

7.8

Crew

8.4

Food

7.3

Entertainment

7.1

Overall

7.8

Comfort

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
LOT
7.6
Good
1,071 reviews
KLM
7.8
Good
1,346 reviews

Boarding

7.8

Crew

8.4

Food

7.3

Entertainment

7.1

Overall

7.8

Comfort

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
Austrian Airlines
7.6
Good
793 reviews
KLM
7.8
Good
1,346 reviews

Boarding

7.8

Crew

8.4

Food

7.3

Entertainment

7.1

Overall

7.8

Comfort

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
SWISS
7.5
Good
1,601 reviews
KLM
7.8
Good
1,346 reviews

Boarding

7.8

Crew

8.4

Food

7.3

Entertainment

7.1

Overall

7.8

Comfort

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
Air France
7.4
Good
1,451 reviews
KLM
7.8
Good
1,346 reviews

Boarding

7.8

Crew

8.4

Food

7.3

Entertainment

7.1

Overall

7.8

Comfort

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.

Related info for your journey

Find useful and relevant information for your journey from Washington, D.C. 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.?

    If you book a flight to Sofia from Washington, D.C., you will be flying to 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 Washington, D.C. to Sofia per day from 6 different airlines.

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

    Lufthansa, at $724, was found to be the cheapest airline from Washington, D.C. to Sofia.Alternate airlines to your destination round-trip include SWISS and Air Canada. Lufthansa is 12% cheaper than the average price of flights available within the next 90 days to this destination.

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

    For one-way options, check prices for Austrian Airlines. According to our data, you can fly for as low as $381. Users have also found prices from $443 and $449 on Air France and Air Canada, respectively.

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

    Most travelers choose Washington, D.C. Dulles Intl - Sofia, Washington, D.C. Reagan-National - Sofia or Baltimore/Washington - Sofia when deciding on the best route from Washington, D.C. to Sofia.

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

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

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

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

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

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

    Currently, November is the cheapest month in which you can book a flight from Washington, D.C. to Sofia (average of $632). Flying from Washington, D.C. to Sofia in June is currently the most expensive (average of $1,208). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Washington, D.C. to Sofia

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

Top 6 airlines flying from Washington, D.C. to Sofia

Discover the top 6 airlines that operate flights from Washington, D.C. 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 May 23, 2025.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapest$552Average$711FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$599Average$1,080FlexibilityNo cancel feeOn-time69%
Austrian AirlinesCheapest$667Average$1,069FlexibilityNo cancel feeOn-time78%
LufthansaCheapest$713Average$1,048FlexibilityNo cancel feeOn-time76%
ITA AirwaysCheapest$768Average$1,159FlexibilityNo cancel feeOn-time81%
SWISSCheapest$792Average$1,108FlexibilityNo cancel feeOn-time79%

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