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Sofia

$252+ Cheap flights from Dulles Intl (IAD) 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 9/1. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SOF
Aug 28 — Sep 41
Fri 8/28
Fri 9/4
1 adult, Economy
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Cheap flight deals from Dulles Intl to Sofia

Cheapest flights from Dulles Intl to Sofia
Explore the most affordable flight options available from Dulles Intl to Sofia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2026.

This FlightHub deal was found by Cheapflights users on 7/27. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/161:15 pm
IAD
-
SOF
1 stop12h 30m
Turkish Airlines
Sat 10/249:35 am
SOF
-
IAD
1 stop17h 10m
Turkish Airlines
Deal found 7/27$639
This Turkish Airlines deal was found by Cheapflights users on 7/27. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/21:15 pm
IAD
-
SOF
1 stop24h 05m
Turkish Airlines
Fri 10/239:35 am
SOF
-
IAD
1 stop17h 10m
Turkish Airlines
Deal found 7/27$649
This Booking.com deal was found by Cheapflights users on 7/24. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/89:40 pm
IAD
-
SOF
1 stop34h 20m
Turkish Airlines
Tue 9/299:10 pm
SOF
-
IAD
1 stop21h 20m
Turkish Airlines
Deal found 7/24$650
This Mytrip deal was found by Cheapflights users on 7/27. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/710:35 pm
IAD
-
SOF
2 stops19h 50m
Multiple Airlines
Wed 10/215:15 pm
SOF
-
IAD
2 stops34h 20m
Multiple Airlines
Deal found 7/27$656
This Justfly.com deal was found by Cheapflights users on 7/28. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/81:15 pm
IAD
-
SOF
1 stop18h 45m
Turkish Airlines
Tue 9/223:50 pm
SOF
-
IAD
1 stop26h 40m
Turkish Airlines
Deal found 7/28$689
This Turkish Airlines deal was found by Cheapflights users on 7/27. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/199:40 pm
IAD
-
SOF
1 stop34h 20m
Turkish Airlines
Tue 9/153:50 pm
SOF
-
IAD
1 stop34h 55m
Turkish Airlines
Deal found 7/27$699
This Turkish Airlines deal was found by Cheapflights users on 7/27. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/91:15 pm
IAD
-
SOF
1 stop24h 05m
Turkish Airlines
Fri 9/189:10 pm
SOF
-
IAD
1 stop21h 20m
Turkish Airlines
Deal found 7/27$704
This CheapOair deal was found by Cheapflights users on 7/25. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/41:20 pm
IAD
-
SOF
1 stop12h 25m
Turkish Airlines
Wed 9/93:50 pm
SOF
-
IAD
1 stop26h 40m
Turkish Airlines
Deal found 7/25$709
This FlightHub deal was found by Cheapflights users on 7/27. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/61:15 pm
IAD
-
SOF
1 stop18h 45m
Turkish Airlines
Fri 9/1812:35 pm
SOF
-
IAD
1 stop29h 55m
Turkish Airlines
Deal found 7/27$719
This Expedia deal was found by Cheapflights users on 7/28. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1110:55 pm
IAD
-
SOF
1 stop17h 00m
Multiple Airlines
Mon 11/163:00 pm
SOF
-
IAD
1 stop33h 00m
Multiple Airlines
Deal found 7/28$721
This Gotogate deal was found by Cheapflights users on 7/26. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/289:55 am
IAD
-
SOF
2 stops21h 20m
Multiple Airlines
Wed 11/116:25 am
SOF
-
IAD
1 stop16h 30m
Multiple Airlines
Deal found 7/26$722
This FlightHub deal was found by Cheapflights users on 7/27. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/79:40 pm
IAD
-
SOF
1 stop34h 20m
Turkish Airlines
Thu 9/173:50 pm
SOF
-
IAD
1 stop26h 40m
Turkish Airlines
Deal found 7/27$724

Find flight deals from Dulles Intl to Sofia

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) 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 July 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$639
(FlightHub)

One-way from

$252
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$793
Provider with most accurate pricing for Washington, D.C. Dulles Intl-Sofia flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. Dulles Intl-Sofia flights.
Search Deals
From Washington, D.C. Dulles Intl to Sofia
Search Deals
One-way flight from Washington, D.C. Dulles Intl to Sofia
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($125 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($32 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Dulles Intl 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 July 29, 2026.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Sofia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

Thu 10/8

9:40 pm-8:45 am

1 stop28h 05m

Sofia

Tue 10/27

9:45 pm-8:25 pm

1 stop28h 40m

$649

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

Wed 10/14

9:40 pm-3:00 pm

1 stop34h 20m

Sofia

Wed 5/12

9:35 am-7:50 pm

1 stop17h 15m

$649

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

Fri 10/2

1:15 pm-8:20 pm

1 stop24h 05m

Sofia

Fri 10/23

9:35 am-7:45 pm

1 stop17h 10m

$649

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

Mon 10/26

10:20 pm-8:50 am

1 stop28h 30m

Sofia

Mon 11/9

9:45 pm-11:45 am

1 stop21h 00m

$649

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

Wed 10/7

1:15 pm-3:00 pm

1 stop18h 45m

Sofia

Wed 10/21

9:10 pm-7:45 pm

1 stop29h 35m

$649
Quickest round-trip

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

Tue 10/13

1:15 pm-8:45 am

1 stop12h 30m

Sofia

Mon 10/19

9:35 am-7:45 pm

1 stop17h 10m

$729

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

Wed 9/9

9:40 pm-8:45 am

1 stop28h 05m

Sofia

Thu 9/17

9:10 pm-11:30 am

1 stop21h 20m

$729

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

Mon 10/26

6:10 am-1:15 pm

2 stops25h 05m

Sofia

Mon 11/9

2:05 pm-10:25 pm

2 stops39h 20m

$775
Cheapest one-way

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

Tue 9/1

8:30 pm-11:35 am

3 stops32h 05m

$406

Washington, D.C.Sofia

IAD - SOF

IADSOF

Washington, D.C. Dulles Intl

Tue 9/1

10:20 pm-11:15 pm

1 stop17h 55m

$459

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/25

Showing 1-10 of 17 resultsSorted by cheapest first
1
2

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

Have a flexible travel schedule? Discover the best time to fly to Sofia from Dulles Intl 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. Dulles Intl Airport to Sofia

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

Booking 13 days in advance of your planned departure date is, on average, the best time to get cheap flights from Washington, D.C. Dulles Intl Airport 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. Dulles Intl Airport to Sofia?

Currently, February is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Sofia (average of $572). Flying from Washington, D.C. Dulles Intl Airport to Sofia in June is currently the most expensive (average of $1,157). 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.

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

Airfare is below average for this route at the moment.

Washington, D.C. Dulles Intl Airport to Sofia flights typically cost between $716 and $1,044 in October.
The cheapest round-trip price found within the last 5 days was $639 on Turkish Airlines (Oct 16-Oct 24).

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 July 29, 2026.
See what other customers who have flown with Austrian Airlines,Turkish Airlines, andUnited Airlines from Washington, D.C. Dulles Intl Airport to Sofia have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Austrian Airlines
7.6
Good
950 reviews

Entertainment

6.8

Food

6.8

Overall

7.6

Crew

8.1

Comfort

7.3

Boarding

7.6

Reviews

1 / 20
2.0
Mediocre

Nate,Dec 2025

IAD - GSP

Again, I missed this flight because of the first leg of my journey being delayed by three hours. I hope the people on the flight had a nice flight.
Austrian Airlines
7.6
Good
950 reviews
Austrian Airlines
7.6
Good
950 reviews

Entertainment

6.8

Food

6.8

Overall

7.6

Crew

8.1

Comfort

7.3

Boarding

7.6

Reviews

1 / 20
2.0
Mediocre

Nate,Dec 2025

IAD - GSP

Again, I missed this flight because of the first leg of my journey being delayed by three hours. I hope the people on the flight had a nice flight.
Turkish Airlines
7.4
Good
4,455 reviews
Austrian Airlines
7.6
Good
950 reviews

Entertainment

6.8

Food

6.8

Overall

7.6

Crew

8.1

Comfort

7.3

Boarding

7.6

Reviews

1 / 20
2.0
Mediocre

Nate,Dec 2025

IAD - GSP

Again, I missed this flight because of the first leg of my journey being delayed by three hours. I hope the people on the flight had a nice flight.
United Airlines
7.4
Good
10,050 reviews
Austrian Airlines
7.6
Good
950 reviews

Entertainment

6.8

Food

6.8

Overall

7.6

Crew

8.1

Comfort

7.3

Boarding

7.6

Reviews

1 / 20
2.0
Mediocre

Nate,Dec 2025

IAD - GSP

Again, I missed this flight because of the first leg of my journey being delayed by three hours. I hope the people on the flight had a nice flight.
Lufthansa
6.8
Okay
8,164 reviews
Austrian Airlines
7.6
Good
950 reviews

Entertainment

6.8

Food

6.8

Overall

7.6

Crew

8.1

Comfort

7.3

Boarding

7.6

Reviews

1 / 20
2.0
Mediocre

Nate,Dec 2025

IAD - GSP

Again, I missed this flight because of the first leg of my journey being delayed by three hours. I hope the people on the flight had a nice flight.

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl 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. Dulles Intl?

    Most people fly into Sofia (SOF) if they book a flight to Sofia from Washington, D.C. Dulles Intl. On average, Sofia has 0 inbound flights from Washington, D.C. Dulles Intl per day from 4 airlines. Sofia is conveniently located just 4.2 mi from Sofia’s city center.

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

    For as low as $649, Turkish Airlines can have you in Sofia from Washington, D.C. Dulles Intl Airport in 28h 05m. Washington, D.C. Dulles Intl Airport and Sofia are separated by a distance of 4931 mi.

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

    Cheapflights users have booked flights from Washington, D.C. Dulles Intl Airport to Sofia round-trip from $522. Other airlines that can offer you cheap pricing are United Airlines, from $637, and Lufthansa, from $660. These flights start at 35% lower than the current average price 3 months from now.

  • Can I find deals for flights from Dulles Intl to Sofia that include hotel bookings?

    Yes. In addition to deals on Dulles Intl to Sofia flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Dulles Intl to Sofia?

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

  • Can I find deals for business class flights from Dulles Intl to Sofia?

    Yes. Cheapflights offers flight deals from Dulles Intl 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. Dulles Intl Airport to Sofia?

    Currently, February is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Sofia (average of $572). Flying from Washington, D.C. Dulles Intl Airport to Sofia in June is currently the most expensive (average of $1,157). 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

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Alternative routes for Dulles Intl to Sofia

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

Top 4 airlines flying from Dulles Intl to Sofia

Discover the top 4 airlines that operate flights from Dulles Intl 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 July 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapest$522Average$690FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$637Average$1,035FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$660Average$894FlexibilityNo cancel feeOn-time76%
Austrian AirlinesCheapest$809Average$1,265FlexibilityNo cancel feeOn-time78%

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