Washington (IAD) to Sofia (SOF) at a glance

Embark on an adventure from Washington Dulles International Airport (IAD) to Sofia Airport (SOF) by choosing from a range of airlines on this international long-haul route. Explore various options, from full-service carriers to budget airlines, and find the itinerary that aligns with your budget and travel plans as you discover the iconic sights and neighborhoods of Sofia. Here are the essential details for your journey from IAD to SOF.

• Fastest flight duration: around 10h 15m in-flight, plus roughly 2h 30m layover with one stop
• Route distance: roughly 4,900 miles (7,890 km)
• Flights per week: around 10 departures on average
• Typical fares (one-way): economy tickets often range from $300–$810, depending on seasonality and how far ahead you book

Flights from Washington Dulles International Airport (IAD) to Sofia Airport (SOF)

According to the latest traveler bookings, here are the top airlines preferred for one-stop and multi-stop flights from Washington to Sofia. Many travelers opt for routes with popular layovers at Frankfurt International Airport (FRA, approximately 2h 30m), Franz Josef Strauss International Airport (MUC, about 2h 45m), and Istanbul Airport (IST, around 4h 15m). This variety allows you to customize your journey by balancing price, total travel time, and cabin class to discover the ideal itinerary.

• United: As a comprehensive service airline, United provides one-stop flights with one-way ticket prices generally ranging from $310 to $780. This carrier represents about 41% of the departures for this route, featuring an in-flight duration of 10 hours and 15 minutes, and a total travel time of approximately 12 hours and 45 minutes, including layovers.
• Turkish Airlines: Turkish Airlines is a full-service airline offering one-stop travel options, with one-way fares typically falling between $300 and $1430. It accounts for around 24% of the flights along this route, boasting an in-flight time of 10 hours and 15 minutes, and a total journey duration of about 12 hours and 45 minutes, factoring in layovers.
• Lufthansa: This full-service carrier provides one-stop flights, with one-way fares generally ranging from $335 to $755. Lufthansa makes up about 21% of the departures on this route, with a flight time of 10 hours and 15 minutes, and an overall travel time of roughly 12 hours and 45 minutes, including layover periods.
• Austrian Airlines: Offering a full range of services, Austrian Airlines features one-stop flights with one-way fares usually between $300 and $965. This airline accounts for approximately 9% of departures for this route, with an in-flight duration of 10 hours and 15 minutes, and a total journey time of around 12 hours and 45 minutes, including layovers.
• Delta: Delta, a full-service airline, provides one-stop service with one-way fares typically ranging from $510 to $1240. This airline comprises about 2% of the departures on this route, featuring an in-flight time of 10 hours and 15 minutes, and a total travel duration of approximately 12 hours and 45 minutes, including layover time.

Travelers flying from Washington to Sofia can upgrade to business class service offered by Turkish Airlines on this route for a more comfortable journey.

Best time to fly from Washington (IAD) to Sofia (SOF)

The most popular months for travelers flying from Washington to Sofia are June, July, and August, when peak temperatures in Sofia reach up to 70.7°F in August. If you prefer quieter travel, consider January, the least busy and relatively cheaper time to visit with fewer crowds and temperatures around 30.2°F. For better deals, February usually offers the lowest average one-way fare around $344. Flight availability peaks in July, with approximately 12 flights per week, making it easier to find convenient departure times.

• Cheapest time to fly: February usually offers good deals with average one-way fare around $344, roughly 33% cheaper than the yearly average.
• Most flight options: July has the highest number of flights from Washington to Sofia, with approximately 12 flights per week, giving you more flexibility in scheduling your trip.

Month	Temperature	Demand	Weekly Flights	Average one-way Fare
January	30.2°F (-1.0°C)	Low	8	$415
February	34.3°F (1.3°C)	Average	8	$344
March	40.8°F (4.9°C)	Average	8	$485
April	49.6°F (9.8°C)	Average	9	$731
May	57.7°F (14.3°C)	Average	11	$597
June	64.9°F (18.3°C)	High	11	$679
July	70.0°F (21.1°C)	High	12	$505
August	70.7°F (21.5°C)	High	11	$469
September	62.6°F (17.0°C)	Average	8	$464
October	52.2°F (11.2°C)	Low	8	$420
November	43.7°F (6.5°C)	Low	9	$422
December	34.2°F (1.2°C)	Average	10	$667

*Average one-way fare is based on Expedia flight booking data from January 2025 to April 2026 for the specified route and travel class and may change depending on availability, dates, and demand.

Alternative route from Washington (IAD) to Sofia (SOF)

• Washington to Sofia (DCA-SOF): Ronald Reagan Washington National Airport (DCA) is located roughly 23 miles from Washington Dulles International Airport (IAD), making it a convenient option for travelers heading to Sofia.

How to find the best prices for flights from Washington (IAD) to Sofia (SOF)

Getting some of the best deals on flights from Washington to Sofia is all about timing and flexibility. Here are some key tips to help you save:

1. Best times to book and fly: cheaper fares are usually found when booking at least two months in advance, which is when most travelers make their reservations. Afternoon departures, between 12 PM and 6 PM, tend to offer lower prices and are also the most popular flight times. Additionally, flying on Monday generally results in cheaper prices, although Wednesday remains the most popular travel day.
2. Set up price alerts: stay updated on price changes by using Expedia's Price Tracker. Receive alerts when fares drop for your selected route.
3. Bundle and save: bundle your flight and hotel to save on Expedia, or unlock a hotel deal after booking your flight.*
4. Compare flight options: use Expedia's search tool to compare airlines, routes, direct vs. non-direct flights, and flight times. You can also sort by price to find the most affordable options.
5. Stay flexible with dates: being open to different travel days can sometimes help you find better prices on flights and hotels.
6. Think about luggage: nowadays, it's important to check the airline's baggage policies to find the best value. That may be paying for an additional carry-on bag or booking a ticket with checked luggage included. Either way, double-check your allowance before confirming your booking to avoid excess baggage fees at the airport.

*Members only. Savings vary and are not available on all bundles. Select hotels.

Arriving at Sofia Airport from Washington Dulles International Airport

Sofia welcomes travelers from Washington with a range of transport options based on price, convenience, and proximity. For departures, Washington Dulles International Airport is roughly a 40-minute drive (covering about 29 miles) from central Washington. Here's how to reach Sofia efficiently:

• Hotel transfer: Transfers offer a convenient way to reach your hotel in Sofia, with private rides that can be arranged in advance.
• Car rental: Renting a car from Sofia Airport is a great option if you plan to explore and sightsee beyond the city. Browse cheap car rentals at Sofia Airport on Expedia.
• Taxi/ride-hailing: Taxis and ride-hailing services may be available from designated pickup areas outside the terminal, check locally on arrival.
• Public transportation: From Sofia Airport, several key transport options are conveniently accessible by car. Sofia Airport Terminal 2 Station, a metro station, is located about 0.7 miles from the airport, while Sofia Seaport, a seaport, is approximately 4.6 miles away. Additionally, Sofia Central Station, a train station, is situated around 5 miles from the airport.