HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Colorado

$827+ 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 1/16. Fares are subject to change and may not be available on all flights or dates of travel.
SOF — DEN
janv. 11 — janv. 181
dim. 1/11
dim. 1/18
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

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 décembre 12, 2025.

This Lufthansa deal was found by Cheapflights users on 12/9. 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.
mar. 12/236:05 amSOF - DEN
1 stop17h 30mLufthansa
jeu. 1/224:20 pmDEN - SOF
1 stop21h 25mLufthansa
Deal found 12/9$861
This United Airlines deal was found by Cheapflights users on 12/9. 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.
mar. 12/236:00 amSOF - DEN
2 stops27h 15mUnited Airlines
jeu. 1/2211:20 amDEN - SOF
2 stops26h 25mUnited Airlines
Deal found 12/9$864

Find flight deals from Bulgaria to Colorado

Keep the following information in mind while searching for Bulgaria to Colorado flight deals. Data was last updated décembre 12, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$827
(Kiwi.com)

Popular in

May

Cheapest in

February

Average price

$940
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. 5% potential increase in price ($51 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($21 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 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 décembre 12, 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

ven. 1/16

6:10 am-1:40 pm

1 stop16h 30m

Denver Intl

jeu. 1/22

11:20 am-1:15 pm

2 stops16h 55m

$827

SofiaDenver

SOF - DEN

SOFDEN

Sofia

ven. 1/16

6:10 am-1:40 pm

1 stop16h 30m

Denver Intl

jeu. 1/22

4:20 pm-10:45 pm

1 stop21h 25m

$860

SofiaDenver

SOF - DEN

SOFDEN

Sofia

mar. 12/23

6:05 am-2:35 pm

1 stop17h 30m

Denver Intl

jeu. 1/22

4:20 pm-10:45 pm

1 stop21h 25m

$861

SofiaDenver

SOF - DEN

SOFDEN

Sofia

mar. 12/23

6:00 am-12:15 am

2 stops27h 15m

Denver Intl

jeu. 1/22

11:20 am-10:45 pm

2 stops26h 25m

$864

SofiaDenver

SOF - DEN

SOFDEN

Sofia

sam. 1/24

2:25 pm-10:23 am

2 stops28h 58m

Denver Intl

sam. 1/31

4:20 pm-6:20 pm

1 stop17h 00m

$865

SofiaDenver

SOF - DEN

SOFDEN

Sofia

sam. 1/24

6:25 am-7:25 pm

2 stops22h 00m

Denver Intl

sam. 1/31

9:40 am-1:15 pm

2 stops18h 35m

$866

SofiaDenver

SOF - DEN

SOFDEN

Sofia

sam. 1/24

6:05 am-2:35 pm

1 stop17h 30m

Denver Intl

sam. 1/31

4:20 pm-10:45 pm

1 stop21h 25m

$873

SofiaDenver

SOF - DEN

SOFDEN

Sofia

sam. 12/20

4:20 pm-7:09 pm

3 stops59h 49m

$854

SofiaDenver

SOF - DEN

SOFDEN

Sofia

mar. 12/30

6:05 am-4:00 pm

2 stops18h 55m

$883

SofiaDenver

SOF - DEN

SOFDEN

Sofia

mar. 12/30

1:45 pm-11:04 pm

3 stops42h 19m

$909

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/10

Showing 1-10 of 13 results
1
2

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, July is the cheapest month in which you can book a flight from Bulgaria to Colorado (average of $722). Flying from Bulgaria 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 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 décembre 12, 2025.

One of the essential ways to save on airfare from Bulgaria to Colorado is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the evening could potentially save you up to 24% on airfare.

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 décembre 12, 2025.
Read reviews from past customers who have flown United Airlines, Turkish Airlines, and Lufthansa from Bulgaria to Colorado. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,095 reviews

Boarding

7.7

Overall

7.4

Comfort

7.3

Crew

8.1

Food

6.6

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

AMS - EWR

It was good! The first 3/4 of the trip was uncomfortably cold. Only one option for lunch that I didn’t enjoy (vegetarian).
United Airlines
7.4
Good
9,095 reviews
United Airlines
7.4
Good
9,095 reviews

Boarding

7.7

Overall

7.4

Comfort

7.3

Crew

8.1

Food

6.6

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

AMS - EWR

It was good! The first 3/4 of the trip was uncomfortably cold. Only one option for lunch that I didn’t enjoy (vegetarian).
Turkish Airlines
7.3
Good
4,089 reviews
United Airlines
7.4
Good
9,095 reviews

Boarding

7.7

Overall

7.4

Comfort

7.3

Crew

8.1

Food

6.6

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

AMS - EWR

It was good! The first 3/4 of the trip was uncomfortably cold. Only one option for lunch that I didn’t enjoy (vegetarian).
Lufthansa
6.8
Okay
7,626 reviews
United Airlines
7.4
Good
9,095 reviews

Boarding

7.7

Overall

7.4

Comfort

7.3

Crew

8.1

Food

6.6

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

AMS - EWR

It was good! The first 3/4 of the trip was uncomfortably cold. Only one option for lunch that I didn’t enjoy (vegetarian).

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.

  • How long is the flight from Bulgaria to Colorado?

    Lufthansa and United Airlines can get you from Bulgaria to Colorado in just under 16h 30m. Your travel time can differ by up to . There are 5871 mi between Bulgaria and Colorado.

  • 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, July is the cheapest month in which you can book a flight from Bulgaria to Colorado (average of $722). Flying from Bulgaria 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

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
Charles de Gaulle to Newark flights
Orly to Newark flights
Heathrow to John F Kennedy Intl flights
Heathrow to Newark flights
Charles de Gaulle to LaGuardia flights
Orly to John F Kennedy Intl flights
Frankfurt to Newark flights
Frankfurt to John F Kennedy Intl flights
Heathrow to LaGuardia flights
Charles de Gaulle to Miami flights
Charles de Gaulle to Los Angeles flights
Gatwick to Newark flights
Frankfurt to LaGuardia flights
London City to John F Kennedy Intl flights
Bruxelles-National to Newark flights
Gatwick to John F Kennedy Intl flights
Stansted to John F Kennedy Intl flights
Gatwick to LaGuardia flights
Malpensa to Newark flights
Frankfurt to Miami flights
Madrid to Newark flights
Berlin to Newark flights
Madrid to John F Kennedy Intl flights
Vienna to Newark flights
Barcelona-El Prat to John F Kennedy Intl flights
Munich to John F Kennedy Intl flights
Luton to John F Kennedy Intl flights
Barcelona-El Prat to Newark flights
Vienna to John F Kennedy Intl flights
Stansted to Newark flights
Bruxelles-National to John F Kennedy Intl flights
London City to Newark flights
Amsterdam to John F Kennedy Intl flights
Munich to Newark flights
Luton to Newark flights
Orly to Los Angeles flights
Amsterdam to Newark flights
Leonardo da Vinci/Fiumicino to Newark flights
Madrid to Miami flights
Berlin to John F Kennedy Intl flights
Leonardo da Vinci/Fiumicino to John F Kennedy Intl flights
Heathrow to Los Angeles flights
Frankfurt to Los Angeles flights
Heathrow to Miami flights
Bruxelles-National to LaGuardia flights
Beauvais-Tille to Newark flights
Zurich 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 décembre 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapest$704Average$807FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$729Average$792FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$749Average$995FlexibilityNo 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.