What airlines fly to Colorado?

United Airlines, Lufthansa and Turkish Airlines are the top three most popular airlines that fly to Colorado from Bulgaria according to our data. United Airlines is the first choice among our users, with 64% of people opting to fly with this airline when traveling to Colorado. Keep in mind that there are 3 different airlines that fly to Colorado on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Bulgaria to Colorado?

Prices for flights from Bulgaria to Colorado were last updated today.

How many operators does momondo search for flights from Bulgaria to Colorado?

As of December 2025, there are 3 operators available to choose from for flights from Bulgaria to Colorado.

How old do you have to be to fly from Bulgaria to Colorado?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Bulgaria to Colorado.

What documentation or ID do you need to fly to Colorado?

The travel and health documents you'll need for your trip to Colorado may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Colorado. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$718 Cheap Flights from Bulgaria to Colorado in 2025/26

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Find the cheapest flights from Bulgaria to Colorado

Round-trip

Recent round-trip flight deals from Bulgaria to Colorado

Enter your travel dates to find the best prices.

6:10 am - 1:40 pm

SOF

DEN

16h 30m1 stop

4:20 pm - 10:45 pm

DEN

SOF

21h 25m1 stop

$865Lufthansa

Fri, Jan 16 - Thu, Jan 22

6:10 am - 1:40 pm

SOF

DEN

16h 30m1 stop

4:20 pm - 10:45 pm

DEN

SOF

21h 25m1 stop

$867United Airlines

Fri, Jan 16 - Thu, Jan 22

6:10 am - 1:40 pm

SOF

DEN

16h 30m1 stop

12:49 pm - 10:45 pm

DEN

SOF

24h 56m2 stops

$871United Airlines

Fri, Jan 16 - Thu, Jan 22

6:10 am - 7:25 pm

SOF

DEN

22h 15m2 stops

12:49 pm - 1:50 pm

DEN

SOF

16h 01m2 stops

$882United Airlines

Fri, Jan 16 - Thu, Jan 22

1:45 pm - 8:53 pm

SOF

ASE

40h 08m2 stops

12:53 pm - 6:20 pm

ASE

SOF

20h 27m2 stops

$894United Airlines

Mon, Jan 12 - Fri, Jan 23

7:05 pm - 6:39 pm

SOF

ASE

32h 34m2 stops

1:33 pm - 6:20 pm

ASE

SOF

19h 47m2 stops

$1,001Lufthansa

Mon, Jan 12 - Fri, Jan 23

7:05 pm - 6:25 pm

SOF

ASE

32h 20m3 stops

7:45 am - 1:15 pm

ASE

SOF

20h 30m2 stops

$1,005Lufthansa

Mon, Jan 12 - Fri, Jan 23

7:05 pm - 6:25 pm

SOF

ASE

32h 20m3 stops

7:45 am - 1:15 pm

ASE

SOF

20h 30m3 stops

$1,058Lufthansa

Mon, Jan 12 - Fri, Jan 23

6:10 am - 4:40 pm

SOF

DEN

19h 30m2 stops

7:50 am - 1:50 pm

DEN

SOF

21h 00m3 stops

$1,149Air Canada

Fri, Jan 16 - Thu, Jan 22

10:10 am - 10:22 am

SOF

ASE

33h 12m3 stops

1:09 pm - 1:00 pm

ASE

SOF

38h 51m2 stops

$4,373Multiple Airlines

Mon, Jan 12 - Fri, Jan 23

United Airlines flights from Bulgaria to Colorado

Our best United Airlines deals on Bulgaria to Colorado flight tickets

United Airlines

Jan 16

SOF6:10 amSofia

16h 30m

1 stop

DEN1:40 pmDenver Intl

Jan 22

DEN4:20 pmDenver Intl

21h 25m

1 stop

SOF10:45 pmSofia

$867

Find similar

United Airlines

Jan 16

SOF6:10 amSofia

16h 30m

1 stop

DEN1:40 pmDenver Intl

Jan 22

DEN12:49 pmDenver Intl

24h 56m

2 stops

SOF10:45 pmSofia

$871

Find similar

United Airlines

Jan 16

SOF6:10 amSofia

22h 15m

2 stops

DEN7:25 pmDenver Intl

Jan 22

DEN12:49 pmDenver Intl

16h 01m

2 stops

SOF1:50 pmSofia

$882

Find similar

Lufthansa flights from Bulgaria to Colorado

Our best Lufthansa deals on Bulgaria to Colorado flight tickets

Lufthansa

Jan 16

SOF6:10 amSofia

16h 30m

1 stop

DEN1:40 pmDenver Intl

Jan 22

DEN4:20 pmDenver Intl

21h 25m

1 stop

SOF10:45 pmSofia

$865

Find similar

Lufthansa

Jan 12

SOF7:05 pmSofia

32h 34m

2 stops

ASE6:39 pmAspen Pitkin County

Jan 23

ASE1:33 pmAspen Pitkin County

19h 47m

2 stops

SOF6:20 pmSofia

$1,001

Find similar

Lufthansa

Jan 12

SOF7:05 pmSofia

32h 20m

3 stops

ASE6:25 pmAspen Pitkin County

Jan 23

ASE7:45 amAspen Pitkin County

20h 30m

2 stops

SOF1:15 pmSofia

$1,005

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Fri 1/16

6:10 am-1:40 pm

1 stop16h 30m

Denver Intl

Thu 1/22

4:20 pm-10:45 pm

1 stop21h 25m

$865

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Fri 1/16

6:10 am-1:40 pm

1 stop16h 30m

Denver Intl

Thu 1/22

4:20 pm-10:45 pm

1 stop21h 25m

$867

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Fri 1/16

6:10 am-1:40 pm

1 stop16h 30m

Denver Intl

Thu 1/22

12:49 pm-10:45 pm

2 stops24h 56m

$871

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Fri 1/16

6:10 am-7:25 pm

2 stops22h 15m

Denver Intl

Thu 1/22

12:49 pm-1:50 pm

2 stops16h 01m

$882

SofiaAspen

SOF - ASE

SOFASE

Sofia

Mon 1/12

1:45 pm-8:53 pm

2 stops40h 08m

Aspen Pitkin County

Fri 1/23

12:53 pm-6:20 pm

2 stops20h 27m

$894

SofiaAspen

SOF - ASE

SOFASE

Sofia

Mon 1/12

7:05 pm-6:39 pm

2 stops32h 34m

Aspen Pitkin County

Fri 1/23

1:33 pm-6:20 pm

2 stops19h 47m

$1,001

SofiaAspen

SOF - ASE

SOFASE

Sofia

Mon 1/12

7:05 pm-6:25 pm

3 stops32h 20m

Aspen Pitkin County

Fri 1/23

7:45 am-1:15 pm

2 stops20h 30m

$1,005

SofiaAspen

SOF - ASE

SOFASE

Sofia

Mon 1/12

7:05 pm-6:25 pm

3 stops32h 20m

Aspen Pitkin County

Fri 1/23

7:45 am-1:15 pm

3 stops20h 30m

$1,058

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Fri 1/16

6:10 am-4:40 pm

2 stops19h 30m

Denver Intl

Thu 1/22

7:50 am-1:50 pm

3 stops21h 00m

$1,149

SofiaAspen

SOF - ASE

SOFASE

Sofia

Mon 1/12

10:10 am-10:22 am

3 stops33h 12m

Aspen Pitkin County

Fri 1/23

1:09 pm-1:00 pm

2 stops38h 51m

$4,373

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

How to get the cheapest flight ticket from Bulgaria to Colorado

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the cheapest month to fly to Colorado?

The month of February is, on average, the cheapest month to fly to Colorado from Bulgaria, with most prices found around $745. The month of March is another great option to travel to Colorado, with average flight prices from Bulgaria averaging around $755.

What is the cheapest day to depart on your flight to Colorado?

The cheapest day to depart from Bulgaria to Colorado is on a Friday when prices can be found for as low as $778. On the other hand, Thursday is the most expensive day to depart from Bulgaria because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $972.

What is the cheapest time of day to depart on your flight to Colorado?

The cheapest time of day to fly to Colorado is in the evening when flights can be purchased for as low as $691. In the morning is when there is more demand to fly to Colorado, so prices are often more expensive at around $816 per ticket.

Can stopping save me money on Bulgaria to Colorado flights?

You could potentially save up to 23% on your flight if you consider stops on a Bulgaria to Colorado flight.

Cheap Bulgaria to Colorado flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Bulgaria to Colorado

Fastest flight time	39h 07m
Direct flights	None

The fastest flight from Bulgaria to Colorado takes 39h 07m

There are no direct flights from Bulgaria to Colorado. There are no popular flight routes from Bulgaria to Colorado.

Search flight deals

When did momondo last update prices for flights from Bulgaria to Colorado?
Prices for flights from Bulgaria to Colorado were last updated today.
How many operators does momondo search for flights from Bulgaria to Colorado?
As of December 2025, there are 3 operators available to choose from for flights from Bulgaria to Colorado.
How old do you have to be to fly from Bulgaria to Colorado?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Bulgaria to Colorado.
What documentation or ID do you need to fly to Colorado?
The travel and health documents you'll need for your trip to Colorado may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Colorado. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Bulgaria to Colorado

Compare and see reviews for airlines that fly from Bulgaria to Colorado with momondo

Airline	Rating	Free Cancellation	Price
Turkish Airlines	PriceFrom $704	Free Cancellation	Rating 7.3 4,111 reviews	Search Turkish Airlines flights
United Airlines	PriceFrom $729	Free Cancellation	Rating 7.4 9,105 reviews	Search United Airlines flights
Lufthansa	PriceFrom $757	Free Cancellation	Rating 6.8 7,649 reviews	Search Lufthansa flights

Why use momondo?

Why should I use momondo to find a flight deal from Bulgaria to Colorado?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Bulgaria to Colorado for you.

Can I find flights from Bulgaria to Colorado with flexible booking policies on momondo?

momondo does allow users to show only those flights to Colorado from Bulgaria which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Bulgaria to Colorado?

momondo helps you find the best flight between Bulgaria and Colorado by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Bulgaria to Colorado right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Colorado from Bulgaria. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.