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Cheap flights from Colorado to Bulgaria from $276

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Colorado to Bulgaria departing on 7/19. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Colorado to Bulgaria

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
4:05 pm - 6:40 pm
DEN
-
SOF
17h 35m
1 stop
Multiple Airlines Logo
6:10 am - 5:44 pm
SOF
-
DEN
20h 34m
2 stops
$554Multiple Airlines
Mon, Apr 27 - Tue, Nov 17
Lufthansa Logo
4:05 pm - 6:40 pm
DEN
-
SOF
17h 35m
1 stop
Lufthansa Logo
6:10 am - 4:00 pm
SOF
-
DEN
18h 50m
1 stop
$568Lufthansa
Mon, Apr 27 - Tue, Nov 17
British Airways Logo
2:48 pm - 8:10 pm
DEN
-
SOF
21h 22m
2 stops
British Airways Logo
9:25 pm - 4:30 pm
SOF
-
DEN
28h 05m
1 stop
$577British Airways
Tue, Mar 24 - Wed, Apr 1
Lufthansa Logo
5:20 pm - 6:20 pm
DEN
-
SOF
17h 00m
1 stop
Lufthansa Logo
6:10 am - 2:20 pm
SOF
-
DEN
17h 10m
1 stop
$579Lufthansa
Tue, Mar 24 - Wed, Apr 1
British Airways Logo
2:48 pm - 8:10 pm
DEN
-
SOF
21h 22m
2 stops
British Airways Logo
9:25 pm - 5:17 pm
SOF
-
DEN
28h 52m
2 stops
$580British Airways
Tue, Mar 24 - Wed, Apr 1
British Airways Logo
6:43 pm - 7:20 pm
DEN
-
SOF
39h 37m
2 stops
British Airways Logo
8:10 pm - 11:59 pm
SOF
-
DEN
36h 49m
2 stops
$586British Airways
Sat, Apr 4 - Mon, Apr 13
Turkish Airlines Logo
8:20 pm - 8:50 pm
DEN
-
SOF
16h 30m
1 stop
Turkish Airlines Logo
3:50 pm - 6:25 pm
SOF
-
DEN
35h 35m
1 stop
$595Turkish Airlines
Fri, Mar 27 - Mon, Apr 6
Turkish Airlines Logo
8:25 pm - 8:45 am
DEN
-
SOF
27h 20m
1 stop
Turkish Airlines Logo
3:50 pm - 6:25 pm
SOF
-
DEN
35h 35m
1 stop
$596Turkish Airlines
Sat, Apr 4 - Mon, Apr 13
United Airlines Logo
1:43 pm - 10:45 pm
GJT
-
SOF
24h 02m
2 stops
United Airlines Logo
6:05 am - 10:21 pm
SOF
-
GJT
25h 16m
2 stops
$741United Airlines
Wed, Feb 25 - Sun, Mar 1
United Airlines Logo
6:15 pm - 10:45 pm
GJT
-
SOF
19h 30m
2 stops
United Airlines Logo
2:25 pm - 8:30 pm
SOF
-
GJT
39h 05m
2 stops
$760United Airlines
Wed, Feb 25 - Sun, Mar 1

United Airlines flights from Colorado to Bulgaria

Our best United Airlines deals on Colorado to Bulgaria flight tickets
United Airlines
Mar 4
DEN8:20 pmDenver Intl
17h 25m
1 stop
SOF10:45 pmSofia
Mar 8
SOF6:05 amSofia
21h 50m
1 stop
DEN6:55 pmDenver Intl
$630
United Airlines
Mar 4
DEN8:20 pmDenver Intl
17h 25m
1 stop
SOF10:45 pmSofia
Mar 8
SOF2:00 pmSofia
13h 55m
1 stop
DEN7:55 pmDenver Intl
$631
United Airlines
Mar 12
DEN1:25 pmDenver Intl
25h 20m
2 stops
SOF10:45 pmSofia
Mar 18
SOF6:10 amSofia
16h 30m
1 stop
DEN2:40 pmDenver Intl
$633

Lufthansa flights from Colorado to Bulgaria

Our best Lufthansa deals on Colorado to Bulgaria flight tickets
Lufthansa
Apr 27
DEN4:05 pmDenver Intl
17h 35m
1 stop
SOF6:40 pmSofia
Nov 17
SOF6:10 amSofia
18h 50m
1 stop
DEN4:00 pmDenver Intl
$568
Lufthansa
Mar 24
DEN5:20 pmDenver Intl
17h 00m
1 stop
SOF6:20 pmSofia
Apr 1
SOF6:10 amSofia
17h 10m
1 stop
DEN2:20 pmDenver Intl
$579
Lufthansa
Apr 3
DEN5:40 pmDenver Intl
19h 50m
1 stop
SOF10:30 pmSofia
Apr 13
SOF6:20 amSofia
18h 20m
1 stop
DEN3:40 pmDenver Intl
$642

momondo Fare Finder

 
Customize your flight search to find flights from Colorado to Bulgaria 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, momondo users made 832,500 searches. Data last updated February 5, 2026.
Use the filters below to find and compare flights from Colorado to Bulgaria that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Mon 4/27

4:05 pm-6:40 pm

1 stop17h 35m

Sofia

Tue 11/17

6:10 am-5:44 pm

2 stops20h 34m

$554

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Mon 4/27

4:05 pm-6:40 pm

1 stop17h 35m

Sofia

Tue 11/17

6:10 am-4:00 pm

1 stop18h 50m

$568

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Tue 3/24

2:48 pm-8:10 pm

2 stops21h 22m

Sofia

Wed 4/1

9:25 pm-4:30 pm

1 stop28h 05m

$577

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Tue 3/24

5:20 pm-6:20 pm

1 stop17h 00m

Sofia

Wed 4/1

6:10 am-2:20 pm

1 stop17h 10m

$579

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Tue 3/24

2:48 pm-8:10 pm

2 stops21h 22m

Sofia

Wed 4/1

9:25 pm-5:17 pm

2 stops28h 52m

$580

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Sat 4/4

6:43 pm-7:20 pm

2 stops39h 37m

Sofia

Mon 4/13

8:10 pm-11:59 pm

2 stops36h 49m

$586

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Fri 3/27

8:20 pm-8:50 pm

1 stop16h 30m

Sofia

Mon 4/6

3:50 pm-6:25 pm

1 stop35h 35m

$595

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Sat 4/4

8:25 pm-8:45 am

1 stop27h 20m

Sofia

Mon 4/13

3:50 pm-6:25 pm

1 stop35h 35m

$596

Grand JunctionSofia

GJT - SOF

GJTSOF

Grand Junction Regnl

Wed 2/25

1:43 pm-10:45 pm

2 stops24h 02m

Sofia

Sun 3/1

6:05 am-10:21 pm

2 stops25h 16m

$741

Grand JunctionSofia

GJT - SOF

GJTSOF

Grand Junction Regnl

Wed 2/25

6:15 pm-10:45 pm

2 stops19h 30m

Sofia

Sun 3/1

2:25 pm-8:30 pm

2 stops39h 05m

$760

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 resultsSorted by cheapest first
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See travel insights to Bulgaria from

How to get the cheapest flight ticket from Colorado to Bulgaria

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

What is the cheapest month to fly to Bulgaria?

If you aren’t able to travel to Bulgaria during the month of April, then flying in November is also cheap. Prices for this month can be found on momondo for an average of $596.

How far in advance should I book a flight to Bulgaria?

You are more likely to see cheaper flights to Bulgaria from Colorado when booking weeks ahead of your departure date. In general, you can expect to find flights to Bulgaria for around $796 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Bulgaria from Colorado for as low as $652 on momondo.

Can stopping save me money on Colorado to Bulgaria flights?

You could potentially save up to 60% on your flight if you consider stops on a Colorado to Bulgaria flight.

Cheap Colorado to Bulgaria flight deals and tips

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

Fastest flight time

14h 50m

Direct flights

None
The fastest flight from Colorado to Bulgaria takes 14h 50m
There are no direct flights from Colorado to Bulgaria. There are no popular flight routes from Colorado to Bulgaria.
Search flight deals

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

    Prices for flights from Colorado to Bulgaria are updated daily.

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

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

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Colorado to Bulgaria.

  • What documentation or ID do you need to fly to Bulgaria?

    The necessary travel and health documents for your Bulgaria trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Colorado to Bulgaria

Compare and see reviews for airlines that fly from Colorado to Bulgaria with momondo
Airline
Rating
Free Cancellation
Price
Turkish AirlinesPriceFrom $535Free CancellationRating
7.3
4,210 reviews
Search Turkish Airlines flights
LufthansaPriceFrom $616Free CancellationRating
6.8
7,762 reviews
Search Lufthansa flights
United AirlinesPriceFrom $686Free CancellationRating
7.4
9,241 reviews
Search United Airlines flights

Why use momondo?

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

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 Colorado to Bulgaria for you.

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

Yes. All flights to Bulgaria from Colorado on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Bulgaria from Colorado.

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

Price alerts on flights to Bulgaria from Colorado are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your Bulgaria trip

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