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Dulles Intl

$393+ 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 11/23. Fares are subject to change and may not be available on all flights or dates of travel.
SOF — IAD
Nov 27 — Dec 41
Thu 11/27
Thu 12/4
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 October 28, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$517
(KLM)

One-way from

$393
(Kiwi.com)

Popular in

December

Cheapest in

February

Average price

$652
Provider with most accurate pricing for Sofia-Washington, D.C. Dulles Intl flight deals.
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Provider most trusted by Cheapflights users for Sofia-Washington, D.C. Dulles Intl flights.
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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. 7% potential increase in price ($52 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($24 potential savings vs. average RT price).
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Average for round-trip flights in October 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 October 28, 2025.

This KLM deal was found by Cheapflights users on 10/27. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/117:00 amSOF - IAD
1 stop16h 05mMultiple Airlines
Tue 12/96:50 pmIAD - SOF
1 stop12h 05mMultiple Airlines
Deal found 10/27$517
This KLM deal was found by Cheapflights users on 10/27. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/107:00 amSOF - IAD
1 stop16h 05mMultiple Airlines
Mon 11/246:50 pmIAD - SOF
1 stop12h 15mMultiple Airlines
Deal found 10/27$518
This KLM deal was found by Cheapflights users on 10/26. 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 11/1612:36 pmIAD - SOF
2 stops18h 19mMultiple Airlines
Deal found 10/26$522
This KLM deal was found by Cheapflights users on 10/27. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/117:00 amSOF - IAD
2 stops18h 19mMultiple Airlines
Thu 12/116:50 pmIAD - SOF
1 stop12h 05mMultiple Airlines
Deal found 10/27$527
This Air France deal was found by Cheapflights users on 10/27. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/107:00 amSOF - IAD
2 stops18h 26mAir France
Mon 11/2412:37 pmIAD - SOF
2 stops18h 28mAir France
Deal found 10/27$530
This Air France deal was found by Cheapflights users on 10/26. 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.
Mon 11/107:00 amSOF - IAD
2 stops18h 26mAir France
Sun 11/236:50 pmIAD - SOF
1 stop12h 05mAir France
Deal found 10/26$533
This AirNGo deal was found by Cheapflights users on 10/27. 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 AirNGo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/107:00 amSOF - IAD
1 stop16h 05mKLM
Mon 11/2412:11 pmIAD - SOF
2 stops18h 54mKLM
Deal found 10/27$536
This KLM deal was found by Cheapflights users on 10/27. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/87:00 amSOF - IAD
1 stop16h 05mMultiple Airlines
Mon 11/246:50 pmIAD - SOF
1 stop12h 15mMultiple Airlines
Deal found 10/27$552
This KLM deal was found by Cheapflights users on 10/26. 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 12/137:00 amSOF - IAD
1 stop16h 05mKLM
Wed 1/712:30 pmIAD - SOF
2 stops18h 35mKLM
Deal found 10/26$556
This KLM deal was found by Cheapflights users on 10/28. 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.
Mon 11/107:00 amSOF - IAD
1 stop16h 05mKLM
Sun 11/236:05 pmIAD - SOF
1 stop13h 00mKLM
Deal found 10/28$558

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 October 28, 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

Tue 11/11

7:00 am-4:05 pm

1 stop16h 05m

Washington, D.C. Dulles Intl

Tue 12/9

6:50 pm-1:55 pm

1 stop12h 05m

$517

SofiaWashington, D.C.

SOF - IAD

SOFIAD

Sofia

Tue 11/11

7:00 am-4:05 pm

1 stop16h 05m

Washington, D.C. Dulles Intl

Thu 12/11

6:50 pm-1:55 pm

1 stop12h 05m

$517

SofiaWashington, D.C.

SOF - IAD

SOFIAD

Sofia

Thu 11/13

7:00 am-4:05 pm

1 stop16h 05m

Washington, D.C. Dulles Intl

Tue 12/9

6:50 pm-1:55 pm

1 stop12h 05m

$517

SofiaWashington, D.C.

SOF - IAD

SOFIAD

Sofia

Sun 11/9

7:00 am-4:05 pm

1 stop16h 05m

Washington, D.C. Dulles Intl

Sun 11/16

6:50 pm-1:55 pm

1 stop12h 05m

$517

SofiaWashington, D.C.

SOF - IAD

SOFIAD

Sofia

Wed 11/12

7:00 am-4:05 pm

1 stop16h 05m

Washington, D.C. Dulles Intl

Thu 12/11

6:50 pm-1:55 pm

1 stop12h 05m

$517

SofiaWashington, D.C.

SOF - IAD

SOFIAD

Sofia

Wed 11/12

7:00 am-4:23 pm

2 stops16h 23m

Washington, D.C. Dulles Intl

Tue 12/9

6:50 pm-1:55 pm

1 stop12h 05m

$527

SofiaWashington, D.C.

SOF - IAD

SOFIAD

Sofia

Thu 11/13

7:00 am-4:23 pm

2 stops16h 23m

Washington, D.C. Dulles Intl

Thu 12/11

6:50 pm-1:55 pm

1 stop12h 05m

$527

SofiaWashington, D.C.

SOF - IAD

SOFIAD

Sofia

Thu 11/13

7:00 am-4:23 pm

2 stops16h 23m

Washington, D.C. Dulles Intl

Wed 12/10

6:50 pm-2:05 pm

1 stop12h 15m

$527

SofiaWashington, D.C.

SOF - IAD

SOFIAD

Sofia

Tue 11/4

1:00 pm-5:00 am

3 stops47h 00m

$450

SofiaWashington, D.C.

SOF - IAD

SOFIAD

Sofia

Thu 11/6

3:15 pm-7:51 pm

3 stops59h 36m

$484

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/27

Showing 1-10 of 18 results
1
2

Compare providers for flights from Sofia to Dulles Intl

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 Dulles Intl in October.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice 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. Dulles Intl Airport flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Sofia-Washington, D.C. Dulles Intl Airport flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Sofia-Washington, D.C. Dulles Intl Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Sofia-Washington, D.C. Dulles Intl Airport flights, Cheapflights users trust eDreams the most. eDreams 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. Dulles Intl Airport 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 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, October is the cheapest month in which you can book a flight from Sofia to Washington, D.C. Dulles Intl Airport (average of $492). Flying from Sofia to Washington, D.C. Dulles Intl Airport 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 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 October 28, 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 16% on the flight price compared to flying in the morning, which is usually more expensive.

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

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 October 28, 2025.
Peruse reviews from past customers who have flown with KLM, United Airlines, and Turkish Airlines 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
7.7
Good
1,406 reviews

Boarding

7.8

Comfort

7.7

Crew

8.4

Entertainment

7.1

Overall

7.7

Food

7.3

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
1,406 reviews
KLM
7.7
Good
1,406 reviews

Boarding

7.8

Comfort

7.7

Crew

8.4

Entertainment

7.1

Overall

7.7

Food

7.3

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
9,001 reviews
KLM
7.7
Good
1,406 reviews

Boarding

7.8

Comfort

7.7

Crew

8.4

Entertainment

7.1

Overall

7.7

Food

7.3

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
4,031 reviews
KLM
7.7
Good
1,406 reviews

Boarding

7.8

Comfort

7.7

Crew

8.4

Entertainment

7.1

Overall

7.7

Food

7.3

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
7,535 reviews
KLM
7.7
Good
1,406 reviews

Boarding

7.8

Comfort

7.7

Crew

8.4

Entertainment

7.1

Overall

7.7

Food

7.3

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 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 $520, 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 Lufthansa and United Airlines - these airlines can fly you to your destination from $572 and $588, respectively. These flights start at 21% lower than the current average price 3 months from now.

  • 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, October is the cheapest month in which you can book a flight from Sofia to Washington, D.C. Dulles Intl Airport (average of $492). Flying from Sofia to Washington, D.C. Dulles Intl Airport 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. Dulles Intl Airport?

Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locations
Alexandria
Woodbridge
Tysons
Arlington
Springfield
Hanover
Silver Spring
Fairfax
Fredericksburg
Falls Church
Owings Mills
Linthicum Heights
Manassas
Largo
Oxon Hill
Laurel
Towson
National Harbor
Waldorf
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 October 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$520Average$601FlexibilityNo cancel feeOn-time75%
LufthansaCheapest$572Average$650FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$588Average$641FlexibilityNo cancel feeOn-time69%
Turkish AirlinesCheapest$614Average$667FlexibilityNo cancel feeOn-time77%

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