Chicago (ORD) to Sofia (SOF) at a glance

Explore a range of airlines offering flights from Chicago O'Hare International Airport (ORD) to Sofia Airport (SOF) on this long-haul international journey. Whether you prefer full-service airlines or budget options, you can compare various itineraries to find one that suits your budget, schedule, and travel preferences as you prepare to discover Sofia's renowned attractions and neighborhoods. Here are the essential details for your flights from Chicago to Sofia.

• Fastest flight duration: around 10h 45m in-flight, plus roughly 2 hours layover with one stop
• Route distance: roughly 5,200 miles (8,370 km)
• Flights per week: around 14 flights with multiple daily departures on average
• Typical fares (one-way): economy tickets often range from $275–$730, depending on seasonality and how far ahead you book

Flights from O'Hare International Airport (ORD) to Sofia Airport (SOF)

Based on the latest traveler bookings, here are the top airlines flying from Chicago to Sofia, often selected for one-stop and multi-stop journeys. Common layover options include Frankfurt International Airport, FRA (approximately 2h 45m layover), Istanbul Airport, IST (around 1h 45m layover), and Franz Josef Strauss International Airport, MUC (about 2h 15m layover). This flexibility allows you to balance price, total travel time, and cabin class to create the ideal itinerary for your trip.

• United: As a comprehensive carrier, United provides both one-stop and multi-stop services. One-way ticket prices usually fall between $290 and $710. This airline represents about 34% of flights on this route, with an in-flight duration of 10 hours and 45 minutes, leading to a total travel time of around 13 hours.
• Turkish Airlines: Known for its full-service offerings, Turkish Airlines provides one-stop flights with one-way fares generally ranging from $275 to $1205. It constitutes roughly 21% of departures on this route, featuring an in-flight time of 10 hours and 45 minutes, and a total journey time of approximately 13 hours, including layover.
• Lufthansa: This full-service airline also offers one-stop flights, with one-way fares typically priced between $290 and $780. Lufthansa accounts for about 19% of departures on this route, providing an in-flight experience of 10 hours and 45 minutes, leading to a total travel duration of around 13 hours, including layover.
• LOT-Polish Airlines: As a full-service provider, LOT-Polish Airlines offers one-stop options, with one-way fares usually ranging from $310 to $745. This airline represents about 8% of flights on this route, featuring an in-flight time of 10 hours and 45 minutes, resulting in a total journey time of roughly 13 hours, including layover.
• Swiss International Air Lines: Another full-service option, Swiss International Air Lines provides one-stop service, with one-way fares generally between $310 and $575. This airline accounts for approximately 4% of departures on this route, offering an in-flight duration of 10 hours and 45 minutes and a total travel time of around 13 hours, including layover.

Travelers flying from Chicago to Sofia can enhance their journey with an upgrade to business class, which is offered by Turkish Airlines on this route.

Best time to fly from Chicago (ORD) to Sofia (SOF)

The most popular months for travelers flying from Chicago to Sofia are May, July, and August, when peak temperatures in Sofia reach up to 70.7°F in August. If you prefer quieter travel, consider October, the least busy time to visit with temperatures around 52.2°F and typically the lowest average one-way fare (around $375). Flight availability peaks in July, with approximately 23 flights per week, making it easier to find convenient departure times. January and February have the fewest flights, with approximately 9 flights per week.

• Cheapest time to fly: October usually offers good deals with average one-way fare around $375, roughly 19% cheaper than the yearly average.
• More budget-friendly months to fly: November, September, and February typically offer average one-way fares roughly ranging from $378 to $403.
• Most flight options: July has the highest number of flights from Chicago to Sofia, with approximately 23 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	9	$516
February	34.3°F (1.3°C)	Average	9	$403
March	40.8°F (4.9°C)	Average	12	$508
April	49.6°F (9.8°C)	Average	12	$428
May	57.7°F (14.3°C)	High	22	$498
June	64.9°F (18.3°C)	Average	17	$644
July	70.0°F (21.1°C)	High	23	$480
August	70.7°F (21.5°C)	High	18	$421
September	62.6°F (17.0°C)	Average	15	$393
October	52.2°F (11.2°C)	Low	12	$375
November	43.7°F (6.5°C)	Low	11	$378
December	34.2°F (1.2°C)	Average	14	$523

*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.

How to find the best prices for flights from Chicago (ORD) to Sofia (SOF)

Getting some of the best deals on flights from Chicago 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 available when booking at least two months in advance, which is when most travelers make their reservations. Evening departures from 6 PM to midnight tend to be less expensive, while afternoon flights from noon to 6 PM are the most popular. Additionally, flying on Monday generally offers lower prices, although Tuesday remains the most favored 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 O'Hare International Airport

Sofia welcomes travelers from Chicago with a range of transport options based on price, convenience, and proximity. 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 links are conveniently located nearby. Sofia Airport Terminal 2 Station, a metro station, is about 0.7 miles from the airport and can be reached by car, while Sofia Seaport, a seaport, is approximately 4.6 miles away by car, and Sofia Central Station, a train station, is about 5 miles from the airport, also accessible by car.