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$867+ Cheap flights from Sofia (SOF) to Colorado

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/10. Fares are subject to change and may not be available on all flights or dates of travel.
SOF — DEN
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
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Cheap flight deals from Sofia to Colorado

Best flights from Sofia to Colorado
Discover carefully curated flight deals from Sofia to Colorado that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 18, 2025.

This Lufthansa 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/106:20 amSOF - DEN
1 stop18h 20mLufthansa
Mon 6/224:15 pmDEN - SOF
1 stop21h 55mLufthansa
Deal found 12/16$867
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/106:20 amSOF - DEN
2 stops22h 11mUnited Airlines
Mon 6/224:15 pmDEN - SOF
1 stop21h 55mUnited Airlines
Deal found 12/16$873
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.
Wed 6/1011:50 amSOF - DEN
2 stops21h 00mMultiple Airlines
Mon 6/225:45 pmDEN - SOF
2 stops15h 55mMultiple Airlines
Deal found 12/16$907
This British Airways deal was found by Cheapflights users on 12/14. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/152:30 pmSOF - DEN
1 stop34h 00mBritish Airways
Thu 2/195:25 pmDEN - SOF
1 stop32h 50mBritish Airways
Deal found 12/14$1,114
This United Airlines deal was found by Cheapflights users on 12/14. 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.
Sun 2/157:55 amSOF - DEN
2 stops25h 35mUnited Airlines
Thu 2/198:20 pmDEN - SOF
1 stop17h 25mUnited Airlines
Deal found 12/14$1,243
This British Airways 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/69:30 pmSOF - DEN
1 stop28h 00mBritish Airways
Sun 5/176:40 pmDEN - SOF
1 stop15h 30mBritish Airways
Deal found 12/17$1,617
This British Airways 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/39:10 pmSOF - DEN
2 stops27h 36mBritish Airways
Tue 5/1910:38 amDEN - SOF
2 stops25h 02mBritish Airways
Deal found 12/17$1,623
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/12:35 pmSOF - ASE
2 stops37h 42mUnited Airlines
Mon 1/54:51 pmASE - SOF
2 stops44h 54mUnited Airlines
Deal found 12/16$1,666

Find flight deals from Sofia to Colorado

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

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$867
(Lufthansa)

Popular in

May

Cheapest in

February

Average price

$896
Provider with most accurate pricing for Sofia-Denver Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Sofia-Denver Intl flights.
Search Deals
From Sofia to Colorado
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($54 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($22 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 Sofia to Colorado 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 Sofia to Colorado that are best for you.

Fly from

Sofia

Fly to

Colorado

Route

Depart

Return

Price

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Wed 6/10

6:20 am-3:40 pm

1 stop18h 20m

Denver Intl

Mon 6/22

4:15 pm-11:10 pm

1 stop21h 55m

$867

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Wed 6/10

6:20 am-7:31 pm

2 stops22h 11m

Denver Intl

Mon 6/22

4:15 pm-11:10 pm

1 stop21h 55m

$873

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Wed 6/10

11:50 am-11:50 pm

2 stops21h 00m

Denver Intl

Mon 6/22

5:45 pm-6:40 pm

2 stops15h 55m

$907

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Sun 2/15

2:30 pm-3:30 pm

1 stop34h 00m

Denver Intl

Thu 2/19

5:25 pm-11:15 am

1 stop32h 50m

$1,114

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Sun 2/15

7:55 am-12:30 am

2 stops25h 35m

Denver Intl

Thu 2/19

8:20 pm-10:45 pm

1 stop17h 25m

$1,243

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Wed 5/6

9:30 pm-4:30 pm

1 stop28h 00m

Denver Intl

Sun 5/17

6:40 pm-7:10 pm

1 stop15h 30m

$1,617

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Sun 5/3

9:10 pm-3:46 pm

2 stops27h 36m

Denver Intl

Tue 5/19

10:38 am-8:40 pm

2 stops25h 02m

$1,623

SofiaAspen

SOF - ASE

SOFASE

Sofia

Thu 1/1

2:35 pm-7:17 pm

2 stops37h 42m

Aspen Pitkin County

Mon 1/5

4:51 pm-10:45 pm

2 stops44h 54m

$1,666

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/16

Best time to book a flight from Sofia to Colorado

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

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

Currently, July is the cheapest month in which you can book a flight from Sofia to Colorado (average of $722). Flying from Sofia to Colorado in April is currently the most expensive (average of $861). 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 SOF to CO?

Find hourly flight availability from Sofia to Colorado. 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.

When flying from Sofia to Colorado, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 24% versus a flight at noon.

How much does it cost to fly round-trip from Sofia to Colorado?

Reviews of airlines servicing Colorado

Get insights into the airlines that provide service to Colorado. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Colorado. Reviews last updated December 18, 2025.
Peruse reviews from past customers who have flown with United Airlines, Turkish Airlines, and Lufthansa from Sofia to Colorado to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,091 reviews

Crew

8.1

Boarding

7.7

Food

6.6

Overall

7.4

Entertainment

7.1

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Kevin,Dec 2025

BOS - EWR

Seems like every United flight has a delay and it’s always someone else’s fault. Step up and take some accountability
United Airlines
7.4
Good
9,091 reviews
United Airlines
7.4
Good
9,091 reviews

Crew

8.1

Boarding

7.7

Food

6.6

Overall

7.4

Entertainment

7.1

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Kevin,Dec 2025

BOS - EWR

Seems like every United flight has a delay and it’s always someone else’s fault. Step up and take some accountability
Turkish Airlines
7.3
Good
4,104 reviews
United Airlines
7.4
Good
9,091 reviews

Crew

8.1

Boarding

7.7

Food

6.6

Overall

7.4

Entertainment

7.1

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Kevin,Dec 2025

BOS - EWR

Seems like every United flight has a delay and it’s always someone else’s fault. Step up and take some accountability
Lufthansa
6.8
Okay
7,634 reviews
United Airlines
7.4
Good
9,091 reviews

Crew

8.1

Boarding

7.7

Food

6.6

Overall

7.4

Entertainment

7.1

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Kevin,Dec 2025

BOS - EWR

Seems like every United flight has a delay and it’s always someone else’s fault. Step up and take some accountability

Related info for your journey

Find useful and relevant information for your journey from Sofia to Colorado. 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 from for flights from Sofia to Colorado?

    For a flight from Sofia to Colorado, you will be flying from Sofia. Sofia (SOF) is just 4.2 mi from the center of the city.

  • How long is the flight from Sofia to Colorado?

    For as low as $867, Lufthansa can have you in Colorado from Sofia in 18h 20m. Airlines will cover a distance of 5871 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from Sofia to Colorado one-way?

    $678 is the cheapest one-way deal found within the past few days, from Lufthansa. You may also be able to find cheap deals on Turkish Airlines and United Airlines, with prices starting from $736 and $757, respectively.

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

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

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

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

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

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

    Currently, July is the cheapest month in which you can book a flight from Sofia to Colorado (average of $722). Flying from Sofia to Colorado in April is currently the most expensive (average of $861). 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 Sofia to Colorado

See prices for flight routes from nearby airports that may be better suited for you.
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Top 3 airlines flying from Sofia to Colorado

Discover the top 3 airlines that operate flights from Sofia to Colorado. 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$704Average$807FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$729Average$792FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$749Average$995FlexibilityNo cancel feeOn-time76%

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