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$688+ Cheap flights from Bulgaria 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 5/4. Fares are subject to change and may not be available on all flights or dates of travel.
SOF — DEN
Apr 7 — Apr 141
Mo 4/7
Mo 4/14
1 adult, Economy
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Cheap flight deals from Bulgaria to Colorado

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

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$688
(British Airways)

Popular in

August

Cheapest in

November

Average price

$1,044
Provider with most accurate pricing for Sofia-Denver Intl flight deals.
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Provider most trusted by Cheapflights users for Sofia-Denver Intl flights.
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From Bulgaria to Colorado
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($78 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($24 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 Bulgaria to Colorado

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

This British Airways deal was found by Cheapflights users on 3/31. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
So 5/49:10 pmSOF - DEN
1 stop28h 15mBritish Airways
So 5/116:35 pmDEN - SOF
1 stop15h 35mBritish Airways
Deal found 3/31$688
This United Airlines deal was found by Cheapflights users on 4/1. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
So 5/46:00 amSOF - DEN
1 stop16h 45mUnited Airlines
So 5/119:43 amDEN - SOF
2 stops16h 32mUnited Airlines
Deal found 4/1$782
This Mytrip deal was found by Cheapflights users on 3/31. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
So 5/46:00 amSOF - DEN
2 stops37h 27mAir Canada
So 5/119:40 amDEN - SOF
2 stops24h 00mAir Canada
Deal found 3/31$821
This Air France deal was found by Cheapflights users on 3/31. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sa 4/267:00 amSOF - DEN
2 stops19h 45mMultiple Airlines
Do 5/110:40 amDEN - SOF
2 stops18h 20mMultiple Airlines
Deal found 3/31$892
This Gotogate deal was found by Cheapflights users on 3/31. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sa 4/267:25 pmSOF - DEN
1 stop27h 55mLufthansa
Do 5/14:15 pmDEN - SOF
1 stop17h 20mLufthansa
Deal found 3/31$1,084

Cheapflights Fare Finder

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

Fly from

Bulgaria

Fly to

Colorado

Route

Depart

Return

Price

SofiaDenver

SOF - DEN

SOFDEN

Sofia

So 5/4

9:10 pm-4:25 pm

1 stop28h 15m

Denver Intl

So 5/11

6:35 pm-7:10 pm

1 stop15h 35m

$688

SofiaDenver

SOF - DEN

SOFDEN

Sofia

So 5/4

6:00 am-1:45 pm

1 stop16h 45m

Denver Intl

So 5/11

9:43 am-11:15 am

2 stops16h 32m

$782

SofiaDenver

SOF - DEN

SOFDEN

Sofia

So 5/4

6:00 am-10:27 am

2 stops37h 27m

Denver Intl

So 5/11

9:40 am-6:40 pm

2 stops24h 00m

$821

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Sa 4/26

7:00 am-5:45 pm

2 stops19h 45m

Denver Intl

Do 5/1

10:40 am-2:00 pm

2 stops18h 20m

$892

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Sa 4/26

7:25 pm-2:20 pm

1 stop27h 55m

Denver Intl

Do 5/1

4:15 pm-6:35 pm

1 stop17h 20m

$1,084

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Mi 9/24

9:30 pm-3:44 pm

2 stops27h 14m

$707

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Mi 9/24

9:30 pm-4:25 pm

1 stop27h 55m

$709

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Mi 9/24

8:00 am-4:30 pm

3 stops41h 30m

$805

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/31

Best time to book a flight from Bulgaria to Colorado

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

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

Currently, October is the cheapest month in which you can book a flight from Bulgaria to Colorado (average of $197). Flying from Bulgaria 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 BG to CO?

Find hourly flight availability from Bulgaria 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 April 2, 2025.

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

Rainfall in Colorado by month

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

In terms of precipitation, rainfall in Colorado ranges from 0.5 - 2.3 inches per month. May is typically the wettest month, when rainfall can reach 2.3 in. January is typically the driest time to visit Colorado when rainfall is around 0.5 in.

Temperature in Colorado by month

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

If weather is an important factor for your trip to Colorado, 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 73.4 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 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 April 2, 2025.
United Airlines
7.4
Good
8,615 reviews

Comfort

7.3

Food

6.6

Crew

8.1

Boarding

7.7

Overall

7.4

Entertainment

7.0

Reviews

1 / 20
4.0
Okay

Patti,Feb 2025

FCO - EWR

The food was inedible! We are in the food business and aren’t sure who got this contract. But prisoners eat better. The food was so bad. I ate just a small amount and it made me nauseous. Everything is over microwaved too. And what is with the options? Vegan and vegetarian, but no keto or carnivore? I get that may be more expensive. But I’d gladly pay if it even was an option. But it’s not. There are many fresh options that could have been offered that don’t have to be heated too!
United Airlines
7.4
Good
8,615 reviews
United Airlines
7.4
Good
8,615 reviews

Comfort

7.3

Food

6.6

Crew

8.1

Boarding

7.7

Overall

7.4

Entertainment

7.0

Reviews

1 / 20
4.0
Okay

Patti,Feb 2025

FCO - EWR

The food was inedible! We are in the food business and aren’t sure who got this contract. But prisoners eat better. The food was so bad. I ate just a small amount and it made me nauseous. Everything is over microwaved too. And what is with the options? Vegan and vegetarian, but no keto or carnivore? I get that may be more expensive. But I’d gladly pay if it even was an option. But it’s not. There are many fresh options that could have been offered that don’t have to be heated too!
American Airlines
7.2
Good
10,000 reviews
United Airlines
7.4
Good
8,615 reviews

Comfort

7.3

Food

6.6

Crew

8.1

Boarding

7.7

Overall

7.4

Entertainment

7.0

Reviews

1 / 20
4.0
Okay

Patti,Feb 2025

FCO - EWR

The food was inedible! We are in the food business and aren’t sure who got this contract. But prisoners eat better. The food was so bad. I ate just a small amount and it made me nauseous. Everything is over microwaved too. And what is with the options? Vegan and vegetarian, but no keto or carnivore? I get that may be more expensive. But I’d gladly pay if it even was an option. But it’s not. There are many fresh options that could have been offered that don’t have to be heated too!
Air Canada
7.0
Good
9,022 reviews
United Airlines
7.4
Good
8,615 reviews

Comfort

7.3

Food

6.6

Crew

8.1

Boarding

7.7

Overall

7.4

Entertainment

7.0

Reviews

1 / 20
4.0
Okay

Patti,Feb 2025

FCO - EWR

The food was inedible! We are in the food business and aren’t sure who got this contract. But prisoners eat better. The food was so bad. I ate just a small amount and it made me nauseous. Everything is over microwaved too. And what is with the options? Vegan and vegetarian, but no keto or carnivore? I get that may be more expensive. But I’d gladly pay if it even was an option. But it’s not. There are many fresh options that could have been offered that don’t have to be heated too!
Lufthansa
6.7
Okay
6,963 reviews
United Airlines
7.4
Good
8,615 reviews

Comfort

7.3

Food

6.6

Crew

8.1

Boarding

7.7

Overall

7.4

Entertainment

7.0

Reviews

1 / 20
4.0
Okay

Patti,Feb 2025

FCO - EWR

The food was inedible! We are in the food business and aren’t sure who got this contract. But prisoners eat better. The food was so bad. I ate just a small amount and it made me nauseous. Everything is over microwaved too. And what is with the options? Vegan and vegetarian, but no keto or carnivore? I get that may be more expensive. But I’d gladly pay if it even was an option. But it’s not. There are many fresh options that could have been offered that don’t have to be heated too!
British Airways
6.6
Okay
6,715 reviews
United Airlines
7.4
Good
8,615 reviews

Comfort

7.3

Food

6.6

Crew

8.1

Boarding

7.7

Overall

7.4

Entertainment

7.0

Reviews

1 / 20
4.0
Okay

Patti,Feb 2025

FCO - EWR

The food was inedible! We are in the food business and aren’t sure who got this contract. But prisoners eat better. The food was so bad. I ate just a small amount and it made me nauseous. Everything is over microwaved too. And what is with the options? Vegan and vegetarian, but no keto or carnivore? I get that may be more expensive. But I’d gladly pay if it even was an option. But it’s not. There are many fresh options that could have been offered that don’t have to be heated too!

Related info for your journey

Find useful and relevant information for your journey from Bulgaria to Colorado. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

    To fly one-way, consider booking your trip with British Airways, which is currently one of the cheapest options available, starting at $707. American Airlines flights start at $709 while deals on United Airlines start at $805 one-way.

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

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

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

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

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

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

    Currently, October is the cheapest month in which you can book a flight from Bulgaria to Colorado (average of $197). Flying from Bulgaria 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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Top 3 airlines flying from Bulgaria to Colorado

Discover the top 3 airlines that operate flights from Bulgaria 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 April 2, 2025.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapest$639Average$747FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$718Average$785FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$737Average$904FlexibilityNo cancel feeOn-time76%

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