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 67% 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 May 2026, 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.

$520 Cheap Flights from Bulgaria to Colorado in 2026

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Find the cheapest flights from Bulgaria to Colorado

Round-trip

One-way

Recent round-trip flight deals from Bulgaria to Colorado

Enter your travel dates to find the best prices.

6:30 am - 11:10 pm

SOF

DEN

25h 40m

2 stops

3:58 pm - 10:40 pm

DEN

SOF

21h 42m

2 stops

$966United Airlines

Thu, Jun 4 - Thu, Jun 11

6:30 am - 3:40 pm

SOF

DEN

18h 10m

1 stop

3:55 pm - 10:40 pm

DEN

SOF

21h 45m

1 stop

$971Lufthansa

Thu, Jun 4 - Thu, Jun 11

6:30 am - 3:40 pm

SOF

DEN

18h 10m

1 stop

3:55 pm - 10:50 pm

DEN

SOF

21h 55m

1 stop

$973Lufthansa

Thu, May 28 - Wed, Jun 3

6:30 am - 7:45 pm

SOF

DEN

22h 15m

2 stops

3:55 pm - 10:40 pm

DEN

SOF

21h 45m

1 stop

$977United Airlines

Thu, Jun 4 - Thu, Jun 11

6:30 am - 3:40 pm

SOF

DEN

18h 10m

1 stop

6:15 pm - 10:50 pm

DEN

SOF

19h 35m

2 stops

$980Lufthansa

Thu, May 28 - Wed, Jun 3

6:35 pm - 12:40 pm

SOF

DEN

27h 05m

2 stops

8:10 pm - 12:20 am

DEN

SOF

19h 10m

2 stops

$989Multiple Airlines

Thu, May 28 - Wed, Jun 3

6:10 am - 3:40 pm

SOF

DEN

18h 30m

1 stop

8:25 pm - 12:10 pm

DEN

SOF

30h 45m

1 stop

$998Lufthansa

Tue, Jun 23 - Mon, Jun 29

6:10 am - 3:40 pm

SOF

DEN

18h 30m

1 stop

6:00 am - 11:15 pm

DEN

SOF

32h 15m

2 stops

$999United Airlines

Tue, Jun 23 - Mon, Jun 29

6:10 am - 11:12 pm

SOF

DEN

26h 02m

2 stops

5:40 pm - 12:10 pm

DEN

SOF

33h 30m

2 stops

$1,013Multiple Airlines

Tue, Jun 23 - Mon, Jun 29

2:10 pm - 11:52 pm

SOF

DEN

18h 42m

2 stops

8:25 pm - 10:40 pm

DEN

SOF

17h 15m

2 stops

$1,091Lufthansa

Thu, Jun 4 - Thu, Jun 11

United Airlines flights from Bulgaria to Colorado

Our best United Airlines deals on Bulgaria to Colorado flight tickets

United Airlines

Jun 4

SOF6:30 amSofia

25h 40m

2 stops

DEN11:10 pmDenver Intl

Jun 11

DEN3:58 pmDenver Intl

21h 42m

2 stops

SOF10:40 pmSofia

$966

United Airlines

Jun 4

SOF6:30 amSofia

22h 15m

2 stops

DEN7:45 pmDenver Intl

Jun 11

DEN3:55 pmDenver Intl

21h 45m

1 stop

SOF10:40 pmSofia

$977

United Airlines

Jun 23

SOF6:10 amSofia

18h 30m

1 stop

DEN3:40 pmDenver Intl

Jun 29

DEN6:00 amDenver Intl

32h 15m

2 stops

SOF11:15 pmSofia

$999

Lufthansa flights from Bulgaria to Colorado

Our best Lufthansa deals on Bulgaria to Colorado flight tickets

Lufthansa

Jun 4

SOF6:30 amSofia

18h 10m

1 stop

DEN3:40 pmDenver Intl

Jun 11

DEN3:55 pmDenver Intl

21h 45m

1 stop

SOF10:40 pmSofia

$971

Lufthansa

May 28

SOF6:30 amSofia

18h 10m

1 stop

DEN3:40 pmDenver Intl

Jun 3

DEN3:55 pmDenver Intl

21h 55m

1 stop

SOF10:50 pmSofia

$973

Lufthansa

May 28

SOF6:30 amSofia

18h 10m

1 stop

DEN3:40 pmDenver Intl

Jun 3

DEN6:15 pmDenver Intl

19h 35m

2 stops

SOF10:50 pmSofia

$980

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Thu 6/4

6:30 am-11:10 pm

2 stops25h 40m

Denver Intl

Thu 6/11

3:58 pm-10:40 pm

2 stops21h 42m

$966

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Thu 6/4

6:30 am-3:40 pm

1 stop18h 10m

Denver Intl

Thu 6/11

3:55 pm-10:40 pm

1 stop21h 45m

$971

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Thu 5/28

6:30 am-3:40 pm

1 stop18h 10m

Denver Intl

Wed 6/3

3:55 pm-10:50 pm

1 stop21h 55m

$973

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Thu 6/4

6:30 am-7:45 pm

2 stops22h 15m

Denver Intl

Thu 6/11

3:55 pm-10:40 pm

1 stop21h 45m

$977

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Thu 5/28

6:30 am-3:40 pm

1 stop18h 10m

Denver Intl

Wed 6/3

6:15 pm-10:50 pm

2 stops19h 35m

$980

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Thu 5/28

6:35 pm-12:40 pm

2 stops27h 05m

Denver Intl

Wed 6/3

8:10 pm-12:20 am

2 stops19h 10m

$989

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Tue 6/23

6:10 am-3:40 pm

1 stop18h 30m

Denver Intl

Mon 6/29

8:25 pm-12:10 pm

1 stop30h 45m

$998

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Tue 6/23

6:10 am-3:40 pm

1 stop18h 30m

Denver Intl

Mon 6/29

6:00 am-11:15 pm

2 stops32h 15m

$999

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Tue 6/23

6:10 am-11:12 pm

2 stops26h 02m

Denver Intl

Mon 6/29

5:40 pm-12:10 pm

2 stops33h 30m

$1,013

Quickest round-trip

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Thu 6/4

2:10 pm-11:52 pm

2 stops18h 42m

Denver Intl

Thu 6/11

8:25 pm-10:40 pm

2 stops17h 15m

$1,091

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted 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 January is, on average, the cheapest month to fly to Colorado from Bulgaria, with most prices found around $0. The month of November is another great option to travel to Colorado, with average flight prices from Bulgaria averaging around $701.

Can stopping save me money on Bulgaria to Colorado flights?

You could potentially save up to 27% 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	18h 10m
Direct flights	None

The fastest flight from Bulgaria to Colorado takes 18h 10m

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

Search flight deals

Frequently asked questions about flying from Bulgaria to Colorado

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 May 2026, 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 7.4 4,370 reviews	Search Turkish Airlines flights
United Airlines	PriceFrom $773	Free Cancellation	Rating 7.4 9,733 reviews	Search United Airlines flights
Lufthansa	PriceFrom $802	Free Cancellation	Rating 6.8 8,009 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.