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$668+ Cheap flights from Sofia (SOF) to Colorado

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 12/9. Fares are subject to change and may not be available on all flights or dates of travel.
SOF — DEN
Aug 4 — Aug 111
Mon 8/4
Mon 8/11
1 adult, Economy
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Cheap flight deals from Sofia to Colorado

Keep the following information in mind while searching for Sofia to Colorado flight deals. Data was last updated July 30, 2025.

Round-trip from

$759
(United Airlines)

One-way from

$668
(Thrive Travel)

Popular in

May

Cheapest in

November

Average price

$814
From Sofia to Colorado
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One-way flight from Sofia to Colorado
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Highest demand for flights based on searches. 4% potential increase in price ($40 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($23 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find flight deals from Sofia to Colorado

Cheapest flights from Sofia to Colorado
Explore the most affordable flight options available from Sofia to Colorado. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 30, 2025.

This United Airlines deal was found by Cheapflights users on 7/30. 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 9/166:20 amSOF - DEN
2 stops22h 18mUnited Airlines
Tue 10/73:50 pmDEN - SOF
1 stop17h 00mUnited Airlines
Deal found 7/30$759
This Lufthansa deal was found by Cheapflights users on 7/30. 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.
Tue 9/166:00 amSOF - DEN
1 stop16h 45mLufthansa
Tue 10/75:59 pmDEN - SOF
1 stop19h 51mLufthansa
Deal found 7/30$766
This United Airlines deal was found by Cheapflights users on 7/30. 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.
Sat 8/236:00 amSOF - ASE
2 stops23h 09mUnited Airlines
Wed 5/279:05 amASE - SOF
2 stops28h 45mUnited Airlines
Deal found 7/30$911
This Mytrip deal was found by Cheapflights users on 7/30. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/165:50 amSOF - DEN
2 stops21h 05mMultiple Airlines
Tue 10/74:40 pmDEN - SOF
3 stops23h 30mMultiple Airlines
Deal found 7/30$1,059

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 July 30, 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

Tue 9/16

6:20 am-7:38 pm

2 stops22h 18m

Denver Intl

Tue 10/7

3:50 pm-5:50 pm

1 stop17h 00m

$759

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Tue 9/16

6:00 am-1:45 pm

1 stop16h 45m

Denver Intl

Tue 10/7

5:59 pm-10:50 pm

1 stop19h 51m

$766

SofiaAspen

SOF - ASE

SOFASE

Sofia

Sat 8/23

6:00 am-8:09 pm

2 stops23h 09m

Aspen Pitkin County

Wed 5/27

9:05 am-10:50 pm

2 stops28h 45m

$911

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Tue 9/16

5:50 am-5:55 pm

2 stops21h 05m

Denver Intl

Tue 10/7

4:40 pm-1:10 am

3 stops23h 30m

$1,059

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Tue 12/9

6:00 am-1:40 pm

1 stop16h 40m

$668

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Mon 12/8

12:30 pm-10:04 pm

2 stops42h 34m

$752

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Sat 12/6

12:05 pm-3:30 pm

1 stop36h 25m

$762

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Sat 12/6

7:00 am-3:30 pm

2 stops17h 30m

$774

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Tue 12/9

10:05 am-5:35 pm

1 stop16h 30m

$821

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

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, October is the cheapest month in which you can book a flight from Sofia to Colorado (average of $197). Flying from Sofia to Colorado in March is currently the most expensive (average of $278). 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 July 30, 2025.

When flying from Sofia to Colorado, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 July 30, 2025.
Peruse reviews from past customers who have flown with KLM, Qatar Airways, and United Airlines 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.
KLM
7.8
Good
1,383 reviews

Food

7.3

Boarding

7.8

Comfort

7.7

Crew

8.4

Overall

7.8

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
KLM
7.8
Good
1,383 reviews
KLM
7.8
Good
1,383 reviews

Food

7.3

Boarding

7.8

Comfort

7.7

Crew

8.4

Overall

7.8

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
Qatar Airways
7.4
Good
3,607 reviews
KLM
7.8
Good
1,383 reviews

Food

7.3

Boarding

7.8

Comfort

7.7

Crew

8.4

Overall

7.8

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
United Airlines
7.4
Good
8,896 reviews
KLM
7.8
Good
1,383 reviews

Food

7.3

Boarding

7.8

Comfort

7.7

Crew

8.4

Overall

7.8

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
Turkish Airlines
7.3
Good
3,928 reviews
KLM
7.8
Good
1,383 reviews

Food

7.3

Boarding

7.8

Comfort

7.7

Crew

8.4

Overall

7.8

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
Lufthansa
6.8
Okay
7,269 reviews
KLM
7.8
Good
1,383 reviews

Food

7.3

Boarding

7.8

Comfort

7.7

Crew

8.4

Overall

7.8

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

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.

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

    $668 is the cheapest one-way deal found within the past few days, from Lufthansa. You may also be able to find cheap deals on Qatar Airways and British Airways, with prices starting from $752 and $762, 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, October is the cheapest month in which you can book a flight from Sofia to Colorado (average of $197). Flying from Sofia to Colorado in March is currently the most expensive (average of $278). 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 July 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapest$639Average$803FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$718Average$782FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$737Average$899FlexibilityNo cancel feeOn-time76%

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