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Bulgaria

$254+ Cheap flights from Colorado to Bulgaria

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/15. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SOF
Apr 9 — Apr 161
Thu 4/9
Thu 4/16
1 adult, Economy
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Cheap flight deals from Colorado to Bulgaria

Cheapest flights from Colorado to Bulgaria
Explore the most affordable flight options available from Colorado to Bulgaria. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 10, 2026.

This Justfly.com deal was found by Cheapflights users on 3/9. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/288:25 pm
DEN
-
SOF
1 stop33h 35m
Turkish Airlines
Fri 4/103:50 pm
SOF
-
DEN
1 stop35h 35m
Turkish Airlines
Deal found 3/9$596
This oojo deal was found by Cheapflights users on 3/5. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/78:25 pm
DEN
-
SOF
1 stop14h 50m
Turkish Airlines
Tue 4/149:35 am
SOF
-
DEN
1 stop17h 50m
Turkish Airlines
Deal found 3/5$597
This United Airlines deal was found by Cheapflights users on 3/8. 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.
Wed 12/24:20 pm
DEN
-
SOF
1 stop17h 00m
United Airlines
Sun 12/66:10 am
SOF
-
DEN
1 stop18h 50m
United Airlines
Deal found 3/8$637
This United Airlines deal was found by Cheapflights users on 3/8. 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.
Wed 12/25:30 am
GJT
-
SOF
2 stops32h 15m
United Airlines
Sun 12/66:10 am
SOF
-
GJT
2 stops25h 00m
United Airlines
Deal found 3/8$640
This Lufthansa deal was found by Cheapflights users on 3/6. 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.
Mon 4/204:05 pm
DEN
-
SOF
1 stop21h 55m
Lufthansa
Mon 4/277:25 pm
SOF
-
DEN
1 stop27h 55m
Lufthansa
Deal found 3/6$659
This United Airlines deal was found by Cheapflights users on 3/5. 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.
Tue 4/74:35 pm
DEN
-
SOF
2 stops21h 25m
United Airlines
Tue 4/146:10 am
SOF
-
DEN
2 stops19h 19m
United Airlines
Deal found 3/5$662
This United Airlines deal was found by Cheapflights users on 3/6. 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.
Mon 4/207:45 am
DEN
-
SOF
2 stops25h 55m
United Airlines
Mon 4/2712:55 pm
SOF
-
DEN
1 stop34h 25m
United Airlines
Deal found 3/6$664
This United Airlines deal was found by Cheapflights users on 3/7. 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.
Wed 4/1511:15 am
DEN
-
SOF
2 stops15h 55m
United Airlines
Fri 6/126:20 am
SOF
-
DEN
1 stop16h 10m
United Airlines
Deal found 3/7$683
This FlightHub deal was found by Cheapflights users on 3/6. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/15:40 pm
DEN
-
VAR
2 stops36h 35m
Multiple Airlines
Fri 4/104:00 pm
VAR
-
DEN
2 stops35h 06m
Multiple Airlines
Deal found 3/6$852
This FlightHub deal was found by Cheapflights users on 3/9. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/15:40 pm
DEN
-
VAR
2 stops36h 35m
Lufthansa
Fri 4/104:00 pm
VAR
-
DEN
2 stops32h 40m
Lufthansa
Deal found 3/9$854
This Turkish Airlines deal was found by Cheapflights users on 3/7. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/113:20 pm
DEN
-
VAR
2 stops33h 15m
Turkish Airlines
Sun 11/1510:25 am
VAR
-
DEN
2 stops44h 21m
Turkish Airlines
Deal found 3/7$1,089

Find flight deals from Colorado to Bulgaria

Keep the following information in mind while searching for Colorado to Bulgaria flight deals. Data was last updated March 10, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$596
(Justfly.com)

One-way from

$254
(Kiwi.com)

Popular in

December

Cheapest in

November

Average price

$627
Provider with most accurate pricing for Denver Intl-Sofia flight deals.
Search Deals
Provider most trusted by Cheapflights users for Denver Intl-Sofia flights.
Search Deals
From Colorado to Bulgaria
Search Deals
One-way flight from Colorado to Bulgaria
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($33 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($23 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated March 10, 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

Cheapest round-trip
Quickest round-trip

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Tue 4/7

8:25 pm-8:15 pm

1 stop14h 50m

Sofia

Tue 4/14

9:35 am-6:25 pm

1 stop17h 50m

$597

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Tue 4/7

4:35 pm-11:00 pm

2 stops21h 25m

Sofia

Tue 4/14

6:10 am-4:29 pm

2 stops19h 19m

$662

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Tue 4/28

6:30 pm-8:30 pm

1 stop17h 00m

Sofia

Mon 5/18

8:10 pm-10:45 pm

2 stops35h 35m

$690

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Wed 4/15

5:40 pm-10:50 pm

1 stop20h 10m

Sofia

Fri 6/12

6:20 am-1:30 pm

1 stop16h 10m

$690

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Wed 4/1

10:15 am-12:10 pm

2 stops16h 55m

Sofia

Fri 4/10

6:20 am-3:40 pm

1 stop18h 20m

$754

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Tue 3/31

7:45 am-11:00 pm

2 stops30h 15m

Sofia

Tue 4/14

6:10 am-2:20 pm

1 stop17h 10m

$755

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Sun 7/12

8:25 pm-8:15 pm

1 stop14h 50m

Sofia

Sat 7/25

9:35 am-6:25 pm

1 stop17h 50m

$762

DenverVarna

DEN - VAR

DENVAR

Denver Intl

Wed 4/1

5:40 pm-3:15 pm

2 stops36h 35m

Varna

Fri 4/10

4:00 pm-6:06 pm

2 stops35h 06m

$852

DenverVarna

DEN - VAR

DENVAR

Denver Intl

Wed 4/1

5:40 pm-3:15 pm

2 stops36h 35m

Varna

Fri 4/10

4:00 pm-3:40 pm

2 stops32h 40m

$854
Cheapest one-way

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Wed 4/15

7:15 am-12:20 am

3 stops32h 05m

$254

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/8

Showing 1-10 of 17 resultsSorted by cheapest first
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Best time to book a flight from Colorado to Bulgaria

Have a flexible travel schedule? Discover the best time to fly to Bulgaria from Colorado 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 Colorado to Bulgaria

What is the cheapest month to book a flight from Colorado to Bulgaria?

Currently, August is the cheapest month in which you can book a flight from Colorado to Bulgaria (average of $497). Flying from Colorado to Bulgaria in December is currently the most expensive (average of $906). 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.

Related info for your journey

Find useful and relevant information for your journey from Colorado to Bulgaria. 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 Colorado to Bulgaria?

    A quick flight from Colorado to Bulgaria can take about 14h 50m. Turkish Airlines provides one of the quickest options available for as low as $597. Colorado and Bulgaria are separated by a distance of 5871 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from Colorado to Bulgaria one-way?

    One-way options have recently been found by users for as low as $222 on Lufthansa. Other airlines that offer cheap prices include United Airlines from $282 and Turkish Airlines from $473 one-way.

  • Can I find deals for flights from Colorado to Bulgaria that include hotel bookings?

    Yes. In addition to deals on Colorado to Bulgaria flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Colorado to Bulgaria?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Colorado to Bulgaria.

  • Can I find deals for business class flights from Colorado to Bulgaria?

    Yes. Cheapflights offers flight deals from Colorado to Bulgaria 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 Colorado to Bulgaria?

    Currently, August is the cheapest month in which you can book a flight from Colorado to Bulgaria (average of $497). Flying from Colorado to Bulgaria in December is currently the most expensive (average of $906). 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

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Top 3 airlines flying from Colorado to Bulgaria

Discover the top 3 airlines that operate flights from Colorado to Bulgaria. 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 March 10, 2026.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapest$568Average$776FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$616Average$982FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$686Average$936FlexibilityNo cancel feeOn-time69%

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