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Sofia

$557+ 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 9/10. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SOF
Apr 29 — May 61
Tue 4/29
Tue 5/6
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 April 24, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$638
(FlightHub)

One-way from

$557
(American Airlines)

Popular in

June

Cheapest in

April

Average price

$581
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
Search Deals
Highest demand for flights based on searches. 30% potential increase in price ($397 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($41 potential savings vs. average RT price).
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Average for round-trip flights in April 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 April 24, 2025.

This FlightHub deal was found by Cheapflights users on 4/23. 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.
Thu 9/47:50 pmDEN - SOF
1 stop27h 45mTurkish Airlines
Tue 9/99:25 amSOF - DEN
1 stop17h 30mTurkish Airlines
Deal found 4/23$638
This United Airlines deal was found by Cheapflights users on 4/23. 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 9/48:20 pmDEN - SOF
1 stop17h 40mUnited Airlines
Tue 9/96:20 amSOF - DEN
2 stops36h 54mUnited Airlines
Deal found 4/23$781
This Priceline deal was found by Cheapflights users on 4/22. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/65:40 pmDEN - SOF
2 stops40h 00mAir Canada
Sun 10/196:20 amSOF - DEN
2 stops36h 58mAir Canada
Deal found 4/22$784
This FlightHub deal was found by Cheapflights users on 4/22. 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 10/65:40 pmDEN - SOF
2 stops40h 00mMultiple Airlines
Sun 10/196:00 amSOF - DEN
1 stop17h 20mMultiple Airlines
Deal found 4/22$795
This Lufthansa deal was found by Cheapflights users on 4/23. 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.
Thu 5/85:59 pmDEN - SOF
1 stop19h 51mLufthansa
Wed 10/16:00 amSOF - DEN
1 stop17h 20mLufthansa
Deal found 4/23$838

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 April 24, 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

Thu 9/4

7:50 pm-8:35 am

1 stop27h 45m

Sofia

Tue 9/9

9:25 am-5:55 pm

1 stop17h 30m

$638

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Thu 9/4

8:20 pm-11:00 pm

1 stop17h 40m

Sofia

Tue 9/9

6:20 am-10:14 am

2 stops36h 54m

$781

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Mon 10/6

5:40 pm-6:40 pm

2 stops40h 00m

Sofia

Sun 10/19

6:20 am-10:18 am

2 stops36h 58m

$784

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Mon 10/6

5:40 pm-6:40 pm

2 stops40h 00m

Sofia

Sun 10/19

6:00 am-2:20 pm

1 stop17h 20m

$795

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Thu 5/8

5:59 pm-10:50 pm

1 stop19h 51m

Sofia

Wed 10/1

6:00 am-2:20 pm

1 stop17h 20m

$838

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Wed 9/10

6:35 pm-1:30 pm

1 stop33h 55m

$557

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/24

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, November is the cheapest month in which you can book a flight from Colorado to Sofia (average of $632). Flying from Colorado to Sofia in June is currently the most expensive (average of $1,243). 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 April 24, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Colorado to Sofia as you normally would.

Rainfall in Sofia by month

Plan your trip to Sofia by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Sofia ranges from 1.2 - 2.8 inches per month. June is typically the wettest month, when rainfall can reach 2.8 in. January is typically the driest time to visit Sofia when rainfall is around 1.2 in.

Temperature in Sofia by month

Plan your trip to Sofia by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Sofia, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 68.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 30.2 F).

Reviews of airlines servicing Sofia

Get insights into the airlines that provide service to Sofia. 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 Sofia. Reviews last updated April 24, 2025.
United Airlines
7.4
Good
8,685 reviews

Crew

8.1

Food

6.6

Boarding

7.7

Entertainment

7.1

Overall

7.4

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
8,685 reviews
United Airlines
7.4
Good
8,685 reviews

Crew

8.1

Food

6.6

Boarding

7.7

Entertainment

7.1

Overall

7.4

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Turkish Airlines
7.3
Good
3,775 reviews
United Airlines
7.4
Good
8,685 reviews

Crew

8.1

Food

6.6

Boarding

7.7

Entertainment

7.1

Overall

7.4

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
American Airlines
7.2
Good
10,000 reviews
United Airlines
7.4
Good
8,685 reviews

Crew

8.1

Food

6.6

Boarding

7.7

Entertainment

7.1

Overall

7.4

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Air Canada
7.0
Good
9,192 reviews
United Airlines
7.4
Good
8,685 reviews

Crew

8.1

Food

6.6

Boarding

7.7

Entertainment

7.1

Overall

7.4

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Lufthansa
6.7
Okay
7,027 reviews
United Airlines
7.4
Good
8,685 reviews

Crew

8.1

Food

6.6

Boarding

7.7

Entertainment

7.1

Overall

7.4

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

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.

  • 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, November is the cheapest month in which you can book a flight from Colorado to Sofia (average of $632). Flying from Colorado to Sofia in June is currently the most expensive (average of $1,243). 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

See prices for flight routes from nearby airports that may be better suited for you.
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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 April 24, 2025.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapest$531Average$730FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$687Average$935FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$759Average$1,200FlexibilityNo cancel feeOn-time76%

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