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Flights from Sofia to Denver

What to know about flights from Sofia to Denver?

The distance between Sofia and Denver is approximately 9,454.14 km. Based on Trip.com's data, travel demand peaks in August.

Cheapest one-way
$933
Austrian Airlines Austrian Airlines SOF-DEN 17h 10m · 1 stop Wed, Oct 14
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Cheapest round-trip
$860
Turkish Airlines Turkish Airlines SOF-DEN 35h 25m · 2 stops Sat, Nov 7 - Sat, Nov 14
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Recommended airlines
Austrian Airlines Austrian Airlines Cheapest · From $933 Lufthansa Lufthansa Most booked
When to travel
October
Cheapest
August
Peak season for travel
Route details
9,454.14 km
Flight distance

Explore the cheapest one-way and round-trip flights from Sofia to Denver over the next 90 days, with one-way fares from $933 and round-trip from $860. Based on Trip.com's latest 7-day flight data.

      • SOF 4:00 PM
        35h 25m
        1 stop
        DEN 6:25 PM
        Sofia - Denver | Sat, Nov 7 | Turkish Airlines
        DEN 7:30 PM
        34h 40m
        1 stop
        SOF 3:10 PM
        Denver - Sofia | Sat, Nov 14 | Turkish Airlines
        $860 $1,050
        18% off
        18% off
        $1,050 $860
      • SOF 9:30 AM
        16h 55m
        1 stop
        DEN 5:25 PM
        Sofia - Denver | Sat, Nov 14 | Turkish Airlines
        DEN 7:30 PM
        30h 35m
        1 stop
        SOF 11:05 AM
        Denver - Sofia | Thu, Nov 19 | Turkish Airlines
        $877 $1,050
        16% off
        16% off
        $1,050 $877
      • SOF 4:00 PM
        34h 25m
        1 stop
        DEN 5:25 PM
        Sofia - Denver | Wed, Nov 25 | Turkish Airlines
        DEN 7:30 PM
        30h 35m
        1 stop
        SOF 11:05 AM
        Denver - Sofia | Tue, Dec 1 | Turkish Airlines
        $882 $1,050
        16% off
        16% off
        $1,050 $882
      • SOF 9:30 AM
        16h 55m
        1 stop
        DEN 5:25 PM
        Sofia - Denver | Sat, Nov 28 | Turkish Airlines
        DEN 7:30 PM
        16h 20m
        1 stop
        SOF 8:50 PM
        Denver - Sofia | Sun, Dec 6 | Turkish Airlines
        $910
        13% off
        $1,050 $910
      • SOF 9:30 AM
        17h 55m
        1 stop
        DEN 6:25 PM
        Sofia - Denver | Sun, Nov 8 | Turkish Airlines
        DEN 7:30 PM
        16h 20m
        1 stop
        SOF 8:50 PM
        Denver - Sofia | Sun, Nov 15 | Turkish Airlines
        $925
        12% off
        $1,050 $925
      • SOF 3:50 PM
        35h 35m
        1 stop
        DEN 6:25 PM
        Sofia - Denver | Fri, Oct 16 | Turkish Airlines
        DEN 8:30 PM
        33h 30m
        1 stop
        SOF 3:00 PM
        Denver - Sofia | Fri, Oct 23 | Turkish Airlines
        $927
        12% off
        $1,050 $927
      • SOF 9:30 AM
        17h 55m
        1 stop
        DEN 6:25 PM
        Sofia - Denver | Thu, Nov 12 | Turkish Airlines
        DEN 7:30 PM
        16h 20m
        1 stop
        SOF 8:50 PM
        Denver - Sofia | Thu, Nov 19 | Turkish Airlines
        $941
        10% off
        $1,050 $941
      • SOF 4:00 PM
        35h 25m
        1 stop
        DEN 6:25 PM
        Sofia - Denver | Fri, Nov 6 | Turkish Airlines
        DEN 7:30 PM
        34h 40m
        1 stop
        SOF 3:10 PM
        Denver - Sofia | Sat, Nov 14 | Turkish Airlines
        $948
        10% off
        $1,050 $948
      • SOF 6:25 AM
        16h 15m
        1 stop
        DEN 1:40 PM
        Sofia - Denver | Sat, Nov 7 | Lufthansa
        DEN 8:30 PM
        17h 25m
        1 stop
        SOF 10:55 PM
        Denver - Sofia | Sat, Nov 14 | United Airlines
        $952
        9% off
        $1,050 $952
      • SOF 9:45 PM
        28h 40m
        1 stop
        DEN 6:25 PM
        Sofia - Denver | Sat, Oct 31 | Turkish Airlines
        DEN 8:30 PM
        27h 20m
        1 stop
        SOF 8:50 AM
        Denver - Sofia | Sat, Nov 7 | Turkish Airlines
        $955
        9% off
        $1,050 $955
      • SOF 1:00 PM
        17h 25m
        1 stop
        DEN 2:00 PM
        Sofia - Denver | Wed, Oct 14 | Normal Airline
        DEN 3:00 PM
        6h
        Nonstop
        SOF 4:00 PM
        Denver - Sofia | Fri, Oct 16 | Normal Airline
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      • SOF 6:10 AM
        17h 10m
        1 stop
        DEN 2:20 PM
        Sofia - Denver | Wed, Oct 14 | Austrian Airlines
        $933 $1,037
        10% off
        10% off
        $1,037 $933
      • SOF 6:10 AM
        21h 35m
        1 stop
        DEN 6:45 PM
        Sofia - Denver | Wed, Oct 14 | United Airlines
        $941 $1,037
        9% off
        9% off
        $1,037 $941
      • SOF 12:55 PM
        14h 50m
        1 stop
        DEN 6:45 PM
        Sofia - Denver | Wed, Oct 14 | Lufthansa
        $943 $1,037
        9% off
        9% off
        $1,037 $943
      • SOF 1:00 PM
        17h 25m
        1 stop
        DEN 2:00 PM
        Sofia - Denver | Wed, Oct 14 | Normal Airline
        Find more flights
        Find more flights

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

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

Frequently Asked Questions

  • What are the cheapest flights from Sofia to Denver (SOF-DEN)?

    Based on Trip.com data, Austrian Airlines offers one-way fares as low as $933 on Cheapest nonstop routes (e.g. SOF to DEN on Wed, Oct 14), while Turkish Airlines offers Cheapest nonstop round-trips from $860 departing on Sat, Nov 7 and returning on Sat, Nov 14.
  • At the moment, several airlines serve connecting flights from Sofia to Denver, including: Lufthansa Selected airlines are based on historical data collected from flight bookings made by users 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 Sofia to Denver 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 Sofia to Denver, 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 Wed, Oct 14, with one-way flights priced at just $933.
    · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Austrian 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 Denver travel is around August.
    · Get exclusive promo codes for Trip.com app users.
  • The cheapest months to fly from Sofia to Denver is October, when demand for travel is lower.
  • After crunching the numbers on our October flight calendar, it's currently cheapest to fly from Sofia to Denver on October 31, 2026 with Turkish Airlines, with prices starting at $948.
  • You can arrive at any of the following airports in Denver: Denver International Airport (DEN), and Rocky Mountain Metropolitan Airport (BJC). Flights from Sofia Airport to Denver International Airport (SOF-DEN) are by far the most popular option for this route.
  • The time difference between Denver and Sofia is 9h.
  • 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 Sofia to Denver is $973. Fares vary by travel date, airline and availability.
  • Enter Sofia and Denver, 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.

Explore More Popular Flights

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

Book with no extra fees

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.