What is the cheapest airline that flies from Sofia to Colorado?

Turkish Airlines and Lufthansa are the most popular carriers operating from Sofia to Colorado

What airlines fly to Colorado?

United Airlines, Lufthansa and Turkish Airlines are the top three most popular airlines that fly to Colorado from Sofia 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 Sofia Airport to Colorado?

Prices for flights from Sofia Airport to Colorado are updated daily.

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

As of July 2026, there are 3 operators available to choose from for flights from Sofia Airport to Colorado.

How old do you have to be to fly from Sofia Airport 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 Sofia Airport to Colorado.

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

The required travel and health documents for your Colorado trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Colorado. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$738 Cheap Flights from Sofia to Colorado in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Sofia to Colorado

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

11:25 pm - 9:48 am

SOF

DEN

43h 23m

2 stops

4:05 pm - 6:40 pm

DEN

SOF

17h 35m

1 stop

$916Multiple Airlines

Tue, Sep 15 - Thu, Oct 15

6:30 am - 3:40 pm

SOF

DEN

18h 10m

1 stop

4:15 pm - 6:40 pm

DEN

SOF

17h 25m

1 stop

$938Lufthansa

Thu, Sep 3 - Wed, Sep 9

6:30 am - 3:40 pm

SOF

DEN

18h 10m

1 stop

4:15 pm - 11:15 pm

DEN

SOF

22h 00m

1 stop

$939Lufthansa

Thu, Sep 3 - Thu, Sep 10

6:10 am - 1:45 pm

SOF

DEN

16h 35m

1 stop

4:05 pm - 11:15 pm

DEN

SOF

22h 10m

1 stop

$949Lufthansa

Tue, Sep 15 - Thu, Oct 15

6:10 am - 1:45 pm

SOF

DEN

16h 35m

1 stop

4:15 pm - 11:15 pm

DEN

SOF

22h 00m

1 stop

$952Lufthansa

Mon, Aug 31 - Sun, Sep 6

6:10 am - 1:45 pm

SOF

DEN

16h 35m

1 stop

4:15 pm - 11:15 pm

DEN

SOF

22h 00m

1 stop

$955Lufthansa

Mon, Aug 31 - Sun, Sep 6

6:20 am - 10:00 pm

SOF

ASE

24h 40m

2 stops

8:00 am - 11:15 pm

ASE

SOF

30h 15m

2 stops

$956United Airlines

Fri, Jul 24 - Wed, Sep 30

6:20 am - 10:00 pm

SOF

ASE

24h 40m

2 stops

8:30 am - 10:40 pm

ASE

SOF

29h 10m

2 stops

$957United Airlines

Fri, Jul 24 - Mon, Sep 28

6:30 am - 3:40 pm

SOF

DEN

18h 10m

1 stop

8:15 am - 11:15 pm

DEN

SOF

30h 00m

2 stops

$960United Airlines

Thu, Sep 3 - Thu, Sep 10

6:20 am - 1:30 pm

SOF

DEN

16h 10m

1 stop

11:25 am - 11:00 pm

DEN

SOF

26h 35m

2 stops

$961United Airlines

Mon, Aug 31 - Sun, Sep 6

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Lufthansa flights from Sofia to Colorado

Our best Lufthansa deals on Sofia to Colorado flight tickets

Lufthansa

Sep 3

SOF6:30 amSofia

18h 10m

1 stop

DEN3:40 pmDenver Intl

Sep 9

DEN4:15 pmDenver Intl

17h 25m

1 stop

SOF6:40 pmSofia

$938

Lufthansa

Sep 3

SOF6:30 amSofia

18h 10m

1 stop

DEN3:40 pmDenver Intl

Sep 10

DEN4:15 pmDenver Intl

22h 00m

1 stop

SOF11:15 pmSofia

$939

Lufthansa

Sep 15

SOF6:10 amSofia

16h 35m

1 stop

DEN1:45 pmDenver Intl

Oct 15

DEN4:05 pmDenver Intl

22h 10m

1 stop

SOF11:15 pmSofia

$949

United Airlines flights from Sofia to Colorado

Our best United Airlines deals on Sofia to Colorado flight tickets

United Airlines

Sep 3

SOF6:30 amSofia

18h 10m

1 stop

DEN3:40 pmDenver Intl

Sep 10

DEN8:15 amDenver Intl

30h 00m

2 stops

SOF11:15 pmSofia

$960

United Airlines

Aug 31

SOF6:20 amSofia

16h 10m

1 stop

DEN1:30 pmDenver Intl

Sep 6

DEN11:25 amDenver Intl

26h 35m

2 stops

SOF11:00 pmSofia

$961

United Airlines

Aug 21

SOF6:10 amSofia

16h 35m

1 stop

DEN1:45 pmDenver Intl

Aug 28

DEN1:55 pmDenver Intl

24h 20m

2 stops

SOF11:15 pmSofia

$968

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Tue 9/15

11:25 pm-9:48 am

2 stops43h 23m

Denver Intl

Thu 10/15

4:05 pm-6:40 pm

1 stop17h 35m

$916

Quickest round-trip

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Thu 9/3

6:30 am-3:40 pm

1 stop18h 10m

Denver Intl

Wed 9/9

4:15 pm-6:40 pm

1 stop17h 25m

$938

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Thu 9/3

6:30 am-3:40 pm

1 stop18h 10m

Denver Intl

Thu 9/10

4:15 pm-11:15 pm

1 stop22h 00m

$939

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Tue 9/15

6:10 am-1:45 pm

1 stop16h 35m

Denver Intl

Thu 10/15

4:05 pm-11:15 pm

1 stop22h 10m

$949

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Mon 8/31

6:10 am-1:45 pm

1 stop16h 35m

Denver Intl

Sun 9/6

4:15 pm-11:15 pm

1 stop22h 00m

$952

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Mon 8/31

6:10 am-1:45 pm

1 stop16h 35m

Denver Intl

Sun 9/6

4:15 pm-11:15 pm

1 stop22h 00m

$955

SofiaAspen

SOF - ASE

SOFASE

Sofia

Fri 7/24

6:20 am-10:00 pm

2 stops24h 40m

Aspen Pitkin County

Wed 9/30

8:00 am-11:15 pm

2 stops30h 15m

$956

SofiaAspen

SOF - ASE

SOFASE

Sofia

Fri 7/24

6:20 am-10:00 pm

2 stops24h 40m

Aspen Pitkin County

Mon 9/28

8:30 am-10:40 pm

2 stops29h 10m

$957

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Thu 9/3

6:30 am-3:40 pm

1 stop18h 10m

Denver Intl

Thu 9/10

8:15 am-11:15 pm

2 stops30h 00m

$960

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Mon 8/31

6:20 am-1:30 pm

1 stop16h 10m

Denver Intl

Sun 9/6

11:25 am-11:00 pm

2 stops26h 35m

$961

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 Sofia 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 Sofia, with most prices found around $0. The month of November is another great option to travel to Colorado, with average flight prices from Sofia averaging around $701.

Can stopping save me money on Sofia to Colorado flights?

You could potentially save up to 35% on your flight if you consider stops on a Sofia to Colorado flight.

Cheap Sofia to Colorado flight deals and tips

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

Fastest flight time	16h 45m
Direct flights	None

The fastest flight from Sofia to Colorado takes 16h 45m

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

Search flight deals

Frequently asked questions about flying from Sofia to Colorado

When did momondo last update prices for flights from Sofia Airport to Colorado?
Prices for flights from Sofia Airport to Colorado are updated daily.
How many operators does momondo search for flights from Sofia Airport to Colorado?
As of July 2026, there are 3 operators available to choose from for flights from Sofia Airport to Colorado.
How old do you have to be to fly from Sofia Airport 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 Sofia Airport to Colorado.
What documentation or ID do you need to fly to Colorado?
The required travel and health documents for your Colorado trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Colorado. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from Sofia to Colorado

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

Airline	Rating	Free Cancellation	Price
Turkish Airlines	PriceFrom $704	Free Cancellation	Rating 7.4 4,441 reviews	Search Turkish Airlines flights
United Airlines	PriceFrom $773	Free Cancellation	Rating 7.4 9,966 reviews	Search United Airlines flights
Lufthansa	PriceFrom $810	Free Cancellation	Rating 6.8 8,129 reviews	Search Lufthansa flights

Why use momondo?

Why should I use momondo to find a flight deal from Sofia 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 Sofia to Colorado for you.

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

All flight searches from Sofia to Colorado on momondo can be filtered to show those which offer flexible booking policies.

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

Once all potential Sofia to Colorado flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Of course. momondo tracks the price of Sofia to Colorado flights. All you need is a valid email address and we will do the rest; it is that quick and easy.