HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Colorado

$675+ 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 4/7. Fares are subject to change and may not be available on all flights or dates of travel.
SOF — DEN
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Bulgaria to Colorado with Cheapflights

1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”
2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.
3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 February 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$675
(British Airways)

Popular in

April

Cheapest in

November

Average price

$750
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 Bulgaria to Colorado
Search Deals
Highest demand for flights based on searches. 3% potential increase in price ($35 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($18 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2025
Search Deals

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 February 20, 2025.

This British Airways deal was found by Cheapflights users on 2/20. 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.
Mon 4/78:00 pmSOF - DEN
2 stops32h 50mBritish Airways
Sun 4/136:35 pmDEN - SOF
1 stop15h 35mBritish Airways
Deal found 2/20$675
This United Airlines deal was found by Cheapflights users on 2/20. 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.
Mon 4/76:15 amSOF - DEN
1 stop18h 40mUnited Airlines
Sun 4/134:05 pmDEN - SOF
1 stop21h 55mUnited Airlines
Deal found 2/20$751
This Lufthansa deal was found by Cheapflights users on 2/20. 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.
Mon 4/76:15 amSOF - DEN
1 stop16h 20mLufthansa
Sun 4/134:05 pmDEN - SOF
1 stop21h 55mLufthansa
Deal found 2/20$752
This KLM deal was found by Cheapflights users on 2/20. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/77:00 amSOF - DEN
2 stops22h 00mKLM
Sun 4/1311:36 amDEN - SOF
2 stops17h 24mKLM
Deal found 2/20$778
This Mytrip deal was found by Cheapflights users on 2/20. 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.
Mon 4/77:00 amSOF - DEN
3 stops39h 53mMultiple Airlines
Sun 4/134:05 pmDEN - SOF
3 stops35h 25mMultiple Airlines
Deal found 2/20$1,200

Find flights from Bulgaria to Colorado within your budget

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 February 20, 2025.

Fly from

Bulgaria

Fly to

Colorado

Route

Depart

Return

Price

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Mon 4/7

8:00 pm-7:50 pm

2 stops32h 50m

Denver Intl

Sun 4/13

6:35 pm-7:10 pm

1 stop15h 35m

$675

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Mon 4/7

6:15 am-3:55 pm

1 stop18h 40m

Denver Intl

Sun 4/13

4:05 pm-11:00 pm

1 stop21h 55m

$751

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Mon 4/7

6:15 am-1:35 pm

1 stop16h 20m

Denver Intl

Sun 4/13

4:05 pm-11:00 pm

1 stop21h 55m

$752

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Mon 4/7

7:00 am-8:00 pm

2 stops22h 00m

Denver Intl

Sun 4/13

11:36 am-2:00 pm

2 stops17h 24m

$778

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Mon 4/7

7:00 am-1:53 pm

3 stops39h 53m

Denver Intl

Sun 4/13

4:05 pm-12:30 pm

3 stops35h 25m

$1,200

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/20

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.

Travel insights for flights from Bulgaria to Colorado

Get recent, data-driven insights about flights from Bulgaria to Colorado including ideal travel times, pricing trends, and more.

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 February 20, 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 February 20, 2025.
KLM
7.8
Good
1,333 reviews

Crew

8.4

Food

7.3

Comfort

7.7

Overall

7.8

Boarding

7.8

Entertainment

7.2

Reviews

1 / 20

8.0
Excellent

Anonymous,Dec 2024

YWG - YYZ

I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.

KLM
7.8
Good
1,333 reviews
KLM
7.8
Good
1,333 reviews

Crew

8.4

Food

7.3

Comfort

7.7

Overall

7.8

Boarding

7.8

Entertainment

7.2

Reviews

1 / 20

8.0
Excellent

Anonymous,Dec 2024

YWG - YYZ

I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.

United Airlines
7.4
Good
8,766 reviews
KLM
7.8
Good
1,333 reviews

Crew

8.4

Food

7.3

Comfort

7.7

Overall

7.8

Boarding

7.8

Entertainment

7.2

Reviews

1 / 20

8.0
Excellent

Anonymous,Dec 2024

YWG - YYZ

I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.

Lufthansa
6.7
Okay
6,984 reviews
KLM
7.8
Good
1,333 reviews

Crew

8.4

Food

7.3

Comfort

7.7

Overall

7.8

Boarding

7.8

Entertainment

7.2

Reviews

1 / 20

8.0
Excellent

Anonymous,Dec 2024

YWG - YYZ

I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.

British Airways
6.6
Okay
6,763 reviews
KLM
7.8
Good
1,333 reviews

Crew

8.4

Food

7.3

Comfort

7.7

Overall

7.8

Boarding

7.8

Entertainment

7.2

Reviews

1 / 20

8.0
Excellent

Anonymous,Dec 2024

YWG - YYZ

I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.

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.

  • 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Bulgaria to Colorado

See prices for flight routes from nearby airports that may be better suited for you.
Charles de Gaulle to John F Kennedy Intl flights
Orly to Newark flights
Charles de Gaulle to Newark flights
Heathrow to Newark flights
Heathrow to John F Kennedy Intl flights
Charles de Gaulle to Stewart flights
Orly to John F Kennedy Intl flights
Frankfurt to Newark flights
Charles de Gaulle to Miami flights
Charles de Gaulle to LaGuardia flights
Heathrow to LaGuardia flights
Frankfurt to John F Kennedy Intl flights
London City to John F Kennedy Intl flights
Gatwick to Newark flights
Madrid to John F Kennedy Intl flights
Madrid to Newark flights
London City to Newark flights
Bruxelles-National to John F Kennedy Intl flights
Bruxelles-National to Newark flights
Gatwick to John F Kennedy Intl flights
Vienna to Newark flights
Dublin to John F Kennedy Intl flights
Malpensa to John F Kennedy Intl flights
Vienna to John F Kennedy Intl flights
Leonardo da Vinci/Fiumicino to John F Kennedy Intl flights
Malpensa to Newark flights
Dublin to Newark flights
Charles de Gaulle to Los Angeles flights
Madrid to Miami flights
Bruxelles-National to LaGuardia flights
Orly to Miami flights
Frederic Chopin to John F Kennedy Intl flights
Leonardo da Vinci/Fiumicino to Newark flights
Frankfurt to LaGuardia flights
Munich to John F Kennedy Intl flights
Barcelona-El Prat to Newark flights
Charles de Gaulle to San Francisco flights
Frankfurt to Miami flights
Barcelona-El Prat to John F Kennedy Intl flights
Heathrow to Los Angeles flights
Frederic Chopin to Newark flights
Amsterdam to John F Kennedy Intl flights
Istanbul to John F Kennedy Intl flights
Frankfurt to Los Angeles flights
Amsterdam to Newark flights
Heathrow to Orlando flights
Luton to John F Kennedy Intl flights

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 February 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapest$639Average$734FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$718Average$785FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$731Average$910FlexibilityNo cancel feeOn-time76%
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.