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Flights from Chicago to Sofia

What to know about flights from Chicago to Sofia?

The distance between Chicago and Sofia is approximately 8,357.53 km. Based on Trip.com's data, travel demand peaks in July.

Cheapest one-way
DKK 2,639
Turkish Airlines Turkish Airlines CHI-SOF 18h 25m · 1 stop Mon, Nov 2
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Cheapest round-trip
DKK 4,630
Turkish Airlines Turkish Airlines CHI-SOF 16h 35m · 2 stops Fri, Oct 30 - Tue, Nov 3
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Recommended airlines
Turkish Airlines Turkish Airlines Cheapest · From DKK 2,639 Turkish Airlines Turkish Airlines Most booked
When to travel
August
Cheapest
July
Peak season for travel
Route details
8,357.53 km
Flight distance

Explore the cheapest one-way and round-trip flights from Chicago to Sofia over the next 90 days, with one-way fares from DKK 2,639 and round-trip from DKK 4,630. Based on Trip.com's latest 7-day flight data.

      • ORD 9:15 PM
        16h 35m
        1 stop
        SOF 8:50 PM
        Chicago - Sofia | Fri, Oct 30 | Turkish Airlines
        SOF 4:00 PM
        27h
        1 stop
        ORD 11:00 AM
        Sofia - Chicago | Tue, Nov 3 | Turkish Airlines
        DKK 4,630 DKK 12,611
        63% off
        63% off
        DKK 12,611 DKK 4,630
      • ORD 10:50 PM
        12h 30m
        1 stop
        SOF 6:20 PM
        Chicago - Sofia | Fri, Oct 30 | Lufthansa
        SOF 2:10 PM
        31h
        1 stop
        ORD 1:10 PM
        Sofia - Chicago | Tue, Nov 3 | Lufthansa
        DKK 4,831 DKK 12,611
        62% off
        62% off
        DKK 12,611 DKK 4,831
      • ORD 10:50 PM
        17h 5m
        1 stop
        SOF 10:55 PM
        Chicago - Sofia | Fri, Oct 30 | Austrian Airlines
        SOF 6:25 AM
        14h 45m
        1 stop
        ORD 1:10 PM
        Sofia - Chicago | Tue, Nov 3 | Lufthansa
        DKK 4,888 DKK 12,611
        61% off
        61% off
        DKK 12,611 DKK 4,888
      • ORD 10:50 PM
        12h 5m
        1 stop
        SOF 5:55 PM
        Chicago - Sofia | Fri, Oct 30 | LOT Polish Airlines
        SOF 2:35 PM
        13h 20m
        1 stop
        ORD 7:55 PM
        Sofia - Chicago | Tue, Nov 3 | LOT Polish Airlines
        DKK 5,051
        60% off
        DKK 12,611 DKK 5,051
      • ORD 10:50 PM
        12h 30m
        1 stop
        SOF 6:20 PM
        Chicago - Sofia | Fri, Oct 30 | United Airlines
        SOF 6:25 AM
        14h 45m
        1 stop
        ORD 1:10 PM
        Sofia - Chicago | Tue, Nov 3 | United Airlines
        DKK 5,315
        57% off
        DKK 12,611 DKK 5,315
      • ORD 8:10 PM
        28h 35m
        1 stop
        SOF 8:45 AM
        Chicago - Sofia | Sun, Oct 4 | Turkish Airlines
        SOF 9:10 PM
        20h 30m
        1 stop
        ORD 9:40 AM
        Sofia - Chicago | Thu, Oct 8 | Turkish Airlines
        DKK 7,941
        37% off
        DKK 12,611 DKK 7,941
      • ORD 3:35 PM
        12h 35m
        1 stop
        SOF 12:10 PM
        Chicago - Sofia | Sun, Oct 4 | Lufthansa
        SOF 6:10 AM
        20h 5m
        1 stop
        ORD 6:15 PM
        Sofia - Chicago | Thu, Oct 8 | Lufthansa
        DKK 9,281
        26% off
        DKK 12,611 DKK 9,281
      • ORD 3:35 PM
        12h 35m
        1 stop
        SOF 12:10 PM
        Chicago - Sofia | Sun, Oct 4 | Austrian Airlines
        SOF 12:55 PM
        13h 20m
        1 stop
        ORD 6:15 PM
        Sofia - Chicago | Thu, Oct 8 | Lufthansa
        DKK 9,640
        24% off
        DKK 12,611 DKK 9,640
      • ORD 7:05 PM
        11h 50m
        1 stop
        SOF 2:55 PM
        Chicago - Sofia | Sun, Oct 4 | Swiss Airlines
        SOF 11:05 AM
        33h 30m
        1 stop
        ORD 12:35 PM
        Sofia - Chicago | Thu, Oct 8 | Swiss Airlines
        DKK 9,710
        23% off
        DKK 12,611 DKK 9,710
      • ORD 9:40 PM
        13h
        1 stop
        SOF 6:40 PM
        Chicago - Sofia | Sun, Oct 4 | United Airlines
        SOF 6:10 AM
        20h 5m
        1 stop
        ORD 6:15 PM
        Sofia - Chicago | Thu, Oct 8 | United Airlines
        DKK 9,836
        22% off
        DKK 12,611 DKK 9,836
      • CHI 1:00 PM
        17h 25m
        1 stop
        SOF 2:00 PM
        Chicago - Sofia | Sun, Oct 4 | Normal Airline
        SOF 3:00 PM
        6h
        Nonstop
        CHI 4:00 PM
        Sofia - Chicago | Tue, Oct 6 | Normal Airline
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      • ORD 12:45 PM
        18h 25m
        1 stop
        SOF 3:10 PM
        Chicago - Sofia | Mon, Nov 2 | Turkish Airlines
        DKK 2,639 DKK 5,721
        54% off
        54% off
        DKK 5,721 DKK 2,639
      • ORD 8:10 PM
        16h 10m
        1 stop
        SOF 8:20 PM
        Chicago - Sofia | Sat, Oct 10 | Turkish Airlines
        DKK 2,790 DKK 5,721
        51% off
        51% off
        DKK 5,721 DKK 2,790
      • ORD 9:50 PM
        17h 5m
        1 stop
        SOF 10:55 PM
        Chicago - Sofia | Mon, Nov 2 | United Airlines
        DKK 3,119 DKK 5,721
        45% off
        45% off
        DKK 5,721 DKK 3,119
      • ORD 9:50 PM
        17h 5m
        1 stop
        SOF 10:55 PM
        Chicago - Sofia | Mon, Nov 2 | Austrian Airlines
        DKK 3,175
        45% off
        DKK 5,721 DKK 3,175
      • ORD 9:50 PM
        12h 30m
        1 stop
        SOF 6:20 PM
        Chicago - Sofia | Mon, Nov 2 | Lufthansa
        DKK 3,196
        44% off
        DKK 5,721 DKK 3,196
      • ORD 11:20 PM
        32h 10m
        1 stop
        SOF 3:30 PM
        Chicago - Sofia | Sat, Oct 10 | Jetblue Airways
        DKK 3,227
        44% off
        DKK 5,721 DKK 3,227
      • ORD 11:20 PM
        32h 10m
        1 stop
        SOF 3:30 PM
        Chicago - Sofia | Sat, Oct 10 | Air Serbia
        DKK 3,407
        40% off
        DKK 5,721 DKK 3,407
      • ORD 9:50 PM
        32h
        1 stop
        SOF 1:50 PM
        Chicago - Sofia | Sat, Oct 10 | LOT Polish Airlines
        DKK 4,020
        30% off
        DKK 5,721 DKK 4,020
      • ORD 9:50 PM
        32h
        1 stop
        SOF 1:50 PM
        Chicago - Sofia | Mon, Nov 2 | LOT Polish Airlines
        DKK 4,161
        27% off
        DKK 5,721 DKK 4,161
      • ORD 3:35 PM
        19h 5m
        1 stop
        SOF 6:40 PM
        Chicago - Sofia | Sat, Oct 10 | United Airlines
        DKK 4,462
        22% off
        DKK 5,721 DKK 4,462
      • CHI 1:00 PM
        17h 25m
        1 stop
        SOF 2:00 PM
        Chicago - Sofia | Sun, Oct 4 | Normal Airline
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        Find more flights

Which airlines are the most popular for Chicago to Sofia flights?

You can choose from 1 airlines that fly from Chicago to Sofia, including Turkish Airlines, Turkish Airlines has lowest fares on this route.
Turkish Airlines logo Turkish Airlines
Airlines are determined based on actual purchased flight tickets from Chicago to Sofia according to previous 12 months data from Trip.com.

Frequently Asked Questions

  • What are the cheapest flights from Chicago to Sofia (CHI-SOF)?

    Based on Trip.com data, Turkish Airlines offers one-way fares as low as DKK 2,639 on Cheapest nonstop routes (e.g. ORD to SOF on Mon, Nov 2), while Turkish Airlines offers Cheapest nonstop round-trips from DKK 4,630 departing on Fri, Oct 30 and returning on Tue, Nov 3.
  • At the moment, you can catch a nonstop flight from Chicago to Sofia with the following airlines, including: ITA Airways Selected airlines are based on historical data collected from flight bookings users made on Trip.com within the last 90 days.
  • By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Chicago to Sofia is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.
  • To find best deals on flights from Chicago to Sofia, you can use various tools on Trip.com:
    · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Mon, Nov 2, with one-way flights priced at just DKK 2,639.
    · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Turkish Airlines.
    · Set up price alerts to easily monitor ticket prices without having to check every day.
    · Check Trip.com flight deals and promo codes frequently.
    · Avoid peak season unless you book very early. It seems the peak season for Sofia travel is around July.
    · Get exclusive promo codes for Trip.com app users.
  • The cheapest months to fly from Chicago to Sofia is August, when demand for travel is lower.
  • After crunching the numbers on our October flight calendar, it's currently cheapest to fly from Chicago to Sofia on October 23, 2026 with LOT Polish Airlines, with prices starting at DKK 4,615.
  • You can arrive at any of the following airports in Sofia: Sofia Airport (SOF). Flights from O'Hare International Airport to Sofia Airport (ORD-SOF) are by far the most popular option for this route.
  • The time difference between Sofia and Chicago is 8h.
  • Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.
  • Based on Trip.com data for flights departing in the next 30 days, the average one-way fare from Chicago to Sofia is DKK 4,193. Fares vary by travel date, airline and availability.
  • Enter Chicago and Sofia, choose your travel dates and passengers, then compare flights by price, duration and baggage. Select a fare, review the change and cancellation rules, enter traveler details and complete payment to receive your confirmation.

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Note: Prices shown on this page are estimated lowest price and include all taxes and fees found in the last 24 hours.

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Prices displayed in this page are all-inclusive prices (incl. taxes, fuel surcharge, civil aviation development fund, etc) with all fees confirmed before payment. Fees for luggage, meals, WLAN, or other additional services are also included as shown in the flight cards.

Real-time pricing updates

Prices, availability, and travel information on this page were updated within last 24 hours—even in real-time. The more popular the route, the more precise the data.

Change & Cancellation Policy

Trip.com displays flight cancellation and change policies for each flight ticket during the booking process, including fees and applicable conditions. Please check the following scenarios:
Voluntary cancellation/change:
To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy.
Cancellation/change due to a flight schedule change:
If the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.