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$302+ Cheap flights from Colorado 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 12/5. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SOF
Dec 2 — Dec 91
Tue 12/2
Tue 12/9
1 adult, Economy
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Cheap flight deals from Colorado to Sofia

Keep the following information in mind while searching for Colorado to Sofia flight deals. Data was last updated November 2, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$563
(FlightHub)

One-way from

$302
(Kiwi.com)

Popular in

July

Cheapest in

April

Average price

$705
Provider with most accurate pricing for Denver Intl-Sofia flight deals.
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Provider most trusted by Cheapflights users for Denver Intl-Sofia flights.
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From Colorado to Sofia
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One-way flight from Colorado to Sofia
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Highest demand for flights based on searches. 23% potential increase in price ($265 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($37 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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Find flight deals from Colorado to Sofia

Cheapest flights from Colorado to Sofia
Explore the most affordable flight options available from Colorado to Sofia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 2, 2025.

This FlightHub deal was found by Cheapflights users on 11/1. 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.
Sat 11/297:20 pmDEN - SOF
1 stop28h 25mTurkish Airlines
Sat 12/69:35 amSOF - DEN
1 stop17h 00mTurkish Airlines
Deal found 11/1$563
This oojo deal was found by Cheapflights users on 11/1. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/157:20 pmDEN - SOF
1 stop28h 25mTurkish Airlines
Tue 11/189:35 amSOF - DEN
1 stop17h 00mTurkish Airlines
Deal found 11/1$661
This Turkish Airlines deal was found by Cheapflights users on 10/31. 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.
Tue 11/187:20 pmDEN - SOF
1 stop34h 50mTurkish Airlines
Thu 11/279:35 amSOF - DEN
1 stop17h 00mTurkish Airlines
Deal found 10/31$664
This Gotogate deal was found by Cheapflights users on 11/1. 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.
Sat 11/294:20 pmDEN - SOF
1 stop21h 25mMultiple Airlines
Sat 12/62:00 pmSOF - DEN
2 stops38h 55mMultiple Airlines
Deal found 11/1$678
This FlightHub deal was found by Cheapflights users on 11/2. 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 12/85:35 pmDEN - SOF
2 stops15h 45mLufthansa
Tue 1/62:15 pmSOF - DEN
2 stops34h 57mLufthansa
Deal found 11/2$684
This United Airlines deal was found by Cheapflights users on 10/31. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/88:20 pmDEN - SOF
1 stop17h 25mUnited Airlines
Tue 1/62:15 pmSOF - DEN
2 stops34h 57mUnited Airlines
Deal found 10/31$689
This United Airlines deal was found by Cheapflights users on 10/31. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/95:46 pmDEN - SOF
2 stops19h 59mUnited Airlines
Tue 1/62:15 pmSOF - DEN
2 stops34h 57mUnited Airlines
Deal found 10/31$693
This Air Canada deal was found by Cheapflights users on 11/1. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/2911:44 amDEN - SOF
2 stops21h 31mAir Canada
Sat 12/66:25 amSOF - DEN
2 stops19h 15mAir Canada
Deal found 11/1$697
This Cheapflightsfares deal was found by Cheapflights users on 11/1. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/294:20 pmDEN - SOF
2 stops16h 55mLufthansa
Sat 12/66:25 amSOF - DEN
2 stops19h 05mLufthansa
Deal found 11/1$700
This FlightHub deal was found by Cheapflights users on 11/1. 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 11/34:20 pmDEN - SOF
1 stop21h 25mLufthansa
Wed 11/126:05 amSOF - DEN
1 stop17h 30mLufthansa
Deal found 11/1$710
This Kiwi.com deal was found by Cheapflights users on 11/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/44:20 pmDEN - SOF
1 stop17h 00mLufthansa
Thu 12/116:05 amSOF - DEN
1 stop17h 30mLufthansa
Deal found 11/1$713
This FlightHub deal was found by Cheapflights users on 11/2. 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.
Tue 12/95:45 pmDEN - SOF
2 stops15h 35mLufthansa
Tue 1/62:15 pmSOF - DEN
2 stops34h 57mLufthansa
Deal found 11/2$715

Cheapflights Fare Finder

 
Customize your flight search to find flights from Colorado 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 November 2, 2025.
Use the filters below to find and compare flights from Colorado to Sofia that are best for you.

Fly from

Colorado

Fly to

Sofia

Route

Depart

Return

Price

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Sat 11/29

7:20 pm-8:45 am

1 stop28h 25m

Sofia

Sat 12/6

9:35 am-5:35 pm

1 stop17h 00m

$563

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Thu 4/9

8:25 pm-8:15 pm

1 stop14h 50m

Sofia

Thu 4/23

9:35 am-6:20 pm

1 stop17h 45m

$593

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Thu 4/9

4:05 pm-6:40 pm

1 stop17h 35m

Sofia

Thu 4/23

12:50 pm-11:50 pm

2 stops20h 00m

$627

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Thu 4/9

11:05 am-6:40 pm

2 stops22h 35m

Sofia

Thu 4/23

6:10 am-7:55 pm

2 stops22h 45m

$629

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Wed 4/1

4:05 pm-11:10 pm

1 stop22h 05m

Sofia

Sun 4/5

7:25 pm-2:20 pm

1 stop27h 55m

$632

Grand JunctionSofia

GJT - SOF

GJTSOF

Grand Junction Regnl

Wed 4/1

1:20 pm-6:40 pm

2 stops20h 20m

Sofia

Sun 4/5

7:25 pm-8:27 pm

2 stops34h 02m

$647

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Fri 12/5

11:59 pm-1:00 pm

2 stops52h 01m

$302

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Fri 12/5

4:20 pm-10:45 pm

1 stop21h 25m

$500

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Thu 1/22

7:39 pm-10:45 pm

3 stops42h 06m

$1,658

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Thu 1/22

7:20 pm-8:45 am

1 stop28h 25m

$2,924

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/31

Best time to book a flight from Colorado to Sofia

Have a flexible travel schedule? Discover the best time to fly to Sofia from Colorado 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 Colorado to Sofia

What is the cheapest month to book a flight from Colorado to Sofia?

Currently, February is the cheapest month in which you can book a flight from Colorado to Sofia (average of $518). Flying from Colorado to Sofia in June is currently the most expensive (average of $821). 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.

What is the cheapest time of day to fly from CO to SOF?

Find hourly flight availability from Colorado to Sofia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 2, 2025.

A simple way to save on the total cost of your ticket is to fly from Colorado to Sofia in the evening. If you’re flexible enough to do this you can expect to save up to 25% on your trip compared to booking a flight at noon.

Related info for your journey

Find useful and relevant information for your journey from Colorado 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 Colorado?

    If you book a flight to Sofia from Colorado, you will be flying to Sofia, which is the city’s only airport. Sofia (SOF) is located 4.2 mi from the center of Sofia.

  • How long is the flight from Colorado to Sofia?

    Airlines like Turkish Airlines and Lufthansa fly from Colorado to Sofia in about 17h 35m. The time it takes to get you to your destination can typically vary by up to 10h 50m. Colorado and Sofia are separated by a distance of 5871 mi. This flight may include one or multiple stops.

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

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

  • How can I find direct flights from Colorado to Sofia?

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

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

    Yes. Cheapflights offers flight deals from Colorado 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 Colorado to Sofia?

    Currently, February is the cheapest month in which you can book a flight from Colorado to Sofia (average of $518). Flying from Colorado to Sofia in June is currently the most expensive (average of $821). 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

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Alternative routes for Colorado to Sofia

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Top 3 airlines flying from Colorado to Sofia

Discover the top 3 airlines that operate flights from Colorado 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 November 2, 2025.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapest$522Average$628FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$656Average$870FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$672Average$1,152FlexibilityNo cancel feeOn-time76%

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