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Sofia

$293+ 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 1/7. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SOF
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
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Cheap 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 December 18, 2025.

This Trip.com deal was found by Cheapflights users on 12/15. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/163:40 pmDEN - SOF
2 stops18h 55mMultiple Airlines
Tue 12/239:35 amSOF - DEN
1 stop17h 00mMultiple Airlines
Deal found 12/15$1,710
This FlightHub deal was found by Cheapflights users on 12/15. 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 12/167:20 pmDEN - SOF
1 stop16h 30mTurkish Airlines
Tue 12/239:35 amSOF - DEN
1 stop17h 00mTurkish Airlines
Deal found 12/15$1,784
This United Airlines deal was found by Cheapflights users on 12/15. 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 12/1610:15 amDEN - SOF
2 stops18h 30mUnited Airlines
Tue 12/236:00 amSOF - DEN
1 stop16h 40mUnited Airlines
Deal found 12/15$1,796
This oojo deal was found by Cheapflights users on 12/17. 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.
Mon 12/223:20 pmDEN - SOF
2 stops20h 30mTurkish Airlines
Sat 1/39:35 amSOF - DEN
1 stop17h 00mTurkish Airlines
Deal found 12/17$2,370
This FlightHub deal was found by Cheapflights users on 12/16. 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 12/2211:59 pmDEN - SOF
2 stops23h 46mMultiple Airlines
Sat 1/39:35 amSOF - DEN
1 stop17h 00mMultiple Airlines
Deal found 12/16$2,443
This Cheapflightsfares deal was found by Cheapflights users on 12/16. 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.
Mon 12/225:35 pmDEN - SOF
2 stops21h 20mAustrian Airlines
Sat 1/37:55 amSOF - DEN
2 stops20h 00mAustrian Airlines
Deal found 12/16$2,790
This Gurufare deal was found by Cheapflights users on 12/17. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/228:20 pmDEN - SOF
1 stop13h 00mLufthansa
Sat 1/36:05 amSOF - DEN
1 stop21h 50mLufthansa
Deal found 12/17$2,833

Find flight deals from Colorado to Sofia

Keep the following information in mind while searching for Colorado to Sofia flight deals. Data was last updated December 18, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$545
(United Airlines)

One-way from

$293
(Trip.com)

Popular in

July

Cheapest in

April

Average price

$1,026
Provider with most accurate pricing for Denver Intl-Sofia flight deals.
Search Deals
Provider most trusted by Cheapflights users for Denver Intl-Sofia flights.
Search Deals
From Colorado to Sofia
Search Deals
One-way flight from Colorado to Sofia
Search Deals
Highest demand for flights based on searches. 24% potential increase in price ($270 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($39 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

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 December 18, 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

Grand JunctionSofia

GJT - SOF

GJTSOF

Grand Junction Regnl

Thu 1/29

11:29 am-10:45 pm

2 stops26h 16m

Sofia

Mon 2/2

6:10 am-8:38 pm

2 stops23h 28m

$545

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Sun 4/26

8:25 pm-8:45 am

1 stop27h 20m

Sofia

Sun 5/3

9:35 am-6:25 pm

1 stop17h 50m

$590

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Fri 1/30

7:20 pm-8:50 pm

1 stop16h 30m

Sofia

Tue 2/17

9:35 am-5:35 pm

1 stop17h 00m

$615

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Sat 1/31

7:20 pm-3:10 pm

1 stop34h 50m

Sofia

Sat 2/7

9:35 am-5:35 pm

1 stop17h 00m

$623

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Sat 1/31

7:20 pm-3:10 pm

1 stop34h 50m

Sofia

Fri 2/20

4:00 pm-5:35 pm

1 stop34h 35m

$641

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Thu 1/29

7:20 pm-3:10 pm

1 stop34h 50m

Sofia

Mon 2/16

4:00 pm-5:35 pm

1 stop34h 35m

$652

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Tue 1/27

7:20 pm-3:10 pm

1 stop34h 50m

Sofia

Thu 2/19

9:35 am-5:35 pm

1 stop17h 00m

$652

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Sat 1/31

7:20 pm-3:10 pm

1 stop34h 50m

Sofia

Tue 2/17

9:35 am-5:35 pm

1 stop17h 00m

$652

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Fri 3/13

8:20 pm-8:50 pm

1 stop16h 30m

Sofia

Fri 3/20

9:35 am-6:35 pm

1 stop17h 00m

$659

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Thu 1/29

7:20 pm-3:10 pm

1 stop34h 50m

Sofia

Mon 2/2

9:40 pm-5:35 pm

1 stop28h 55m

$754

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/15

Showing 1-10 of 13 results
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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 December is currently the most expensive (average of $908). 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 December 18, 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 United Airlines and Turkish Airlines fly from Colorado to Sofia in about 26h 16m. The time it takes to get you to your destination can typically vary by up to 1h 04m. Colorado and Sofia are separated by a distance of 6029 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 December is currently the most expensive (average of $908). 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 December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapest$522Average$626FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$616Average$1,114FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$656Average$1,015FlexibilityNo cancel feeOn-time69%

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