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Bulgaria

$342+ 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 10/4. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SOF
Aug 27 — Sep 31
Wed 8/27
Wed 9/3
1 adult, Economy
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Cheap flight deals from Colorado to Bulgaria

Keep the following information in mind while searching for Colorado to Bulgaria flight deals. Data was last updated August 22, 2025.

Round-trip from

$577
(FlightHub)

One-way from

$342
(Kiwi.com)

Popular in

May

Cheapest in

April

Average price

$944
From Colorado to Bulgaria
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One-way flight from Colorado to Bulgaria
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Highest demand for flights based on searches. 8% potential increase in price ($85 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($33 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find 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 August 22, 2025.

This FlightHub deal was found by Cheapflights users on 8/21. 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.
Tue 10/288:20 pmDEN - SOF
1 stop16h 30mTurkish Airlines
Sat 11/810:05 amSOF - DEN
1 stop16h 30mTurkish Airlines
Deal found 8/21$577
This United Airlines deal was found by Cheapflights users on 8/20. 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 11/181:25 pmDEN - SOF
2 stops14h 50mUnited Airlines
Thu 11/276:00 amSOF - DEN
2 stops22h 55mUnited Airlines
Deal found 8/20$601
This United Airlines deal was found by Cheapflights users on 8/20. 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 10/276:35 pmDEN - SOF
2 stops20h 10mUnited Airlines
Wed 11/266:10 amSOF - DEN
1 stop16h 30mUnited Airlines
Deal found 8/20$604
This United Airlines deal was found by Cheapflights users on 8/20. 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.
Sun 10/269:20 pmDEN - SOF
1 stop13h 00mUnited Airlines
Fri 11/216:10 amSOF - DEN
2 stops20h 55mUnited Airlines
Deal found 8/20$607
This United Airlines deal was found by Cheapflights users on 8/20. 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.
Sun 10/269:20 pmDEN - SOF
1 stop13h 00mUnited Airlines
Wed 11/266:10 amSOF - DEN
2 stops23h 58mUnited Airlines
Deal found 8/20$611
This KAYAK deal was found by Cheapflights users on 8/20. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/275:20 pmDEN - SOF
1 stop17h 00mLufthansa
Fri 11/216:05 amSOF - DEN
1 stop17h 30mLufthansa
Deal found 8/20$616
This Lufthansa deal was found by Cheapflights users on 8/20. 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.
Tue 10/285:20 pmDEN - SOF
1 stop21h 25mLufthansa
Mon 11/246:45 pmSOF - DEN
1 stop30h 15mLufthansa
Deal found 8/20$620
This KAYAK deal was found by Cheapflights users on 8/20. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/266:45 pmDEN - SOF
1 stop15h 15mLufthansa
Fri 11/216:05 amSOF - DEN
1 stop17h 30mLufthansa
Deal found 8/20$621
This United Airlines deal was found by Cheapflights users on 8/20. 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 10/276:35 pmDEN - SOF
2 stops15h 45mUnited Airlines
Mon 11/242:20 pmSOF - DEN
1 stop34h 40mUnited Airlines
Deal found 8/20$624
This United deal was found by Cheapflights users on 8/20. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/156:00 amDEN - VAR
2 stops26h 55mMultiple Airlines
Mon 9/2212:20 pmVAR - DEN
1 stop34h 25mMultiple Airlines
Deal found 8/20$793
This Gurufare deal was found by Cheapflights users on 8/20. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/51:45 pmGJT - SOF
2 stops19h 55mLufthansa
Tue 9/96:20 amSOF - GJT
2 stops22h 56mLufthansa
Deal found 8/20$1,014
This Gotogate deal was found by Cheapflights users on 8/20. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/57:20 amGJT - SOF
3 stops26h 20mAir Canada
Tue 9/96:20 amSOF - GJT
3 stops24h 50mAir Canada
Deal found 8/20$1,062

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 August 22, 2025.
Use the filters below to find and compare flights from Colorado to Bulgaria that are best for you.

Fly from

Colorado

Fly to

Bulgaria

Route

Depart

Return

Price

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Tue 10/28

8:20 pm-8:50 pm

1 stop16h 30m

Sofia

Sat 11/8

10:05 am-5:35 pm

1 stop16h 30m

$577

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Sun 10/26

9:20 pm-6:20 pm

1 stop13h 00m

Sofia

Wed 11/26

6:10 am-4:00 pm

1 stop18h 50m

$601

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Tue 10/28

5:20 pm-10:45 pm

1 stop21h 25m

Sofia

Thu 11/20

6:00 am-4:00 pm

1 stop19h 00m

$601

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Wed 10/29

5:20 pm-6:20 pm

1 stop17h 00m

Sofia

Tue 11/25

6:00 am-7:55 pm

2 stops22h 55m

$601

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Mon 10/27

9:20 pm-6:20 pm

1 stop13h 00m

Sofia

Wed 11/26

6:10 am-1:40 pm

1 stop16h 30m

$601

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Tue 11/18

4:20 pm-10:45 pm

1 stop21h 25m

Sofia

Thu 11/27

6:00 am-7:55 pm

2 stops22h 55m

$601

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Wed 10/29

5:20 pm-6:20 pm

1 stop17h 00m

Sofia

Thu 11/20

6:00 am-7:55 pm

2 stops22h 55m

$601

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Sun 10/26

9:20 pm-10:45 pm

1 stop17h 25m

Sofia

Tue 11/25

6:00 am-7:55 pm

2 stops22h 55m

$601

DenverVarna

DEN - VAR

DENVAR

Denver Intl

Mon 9/15

6:00 am-5:55 pm

2 stops26h 55m

Varna

Mon 9/22

12:20 pm-1:45 pm

1 stop34h 25m

$793

Grand JunctionSofia

GJT - SOF

GJTSOF

Grand Junction Regnl

Fri 9/5

1:45 pm-6:40 pm

2 stops19h 55m

Sofia

Tue 9/9

6:20 am-8:16 pm

2 stops22h 56m

$1,014

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/20

Showing 1-10 of 21 results
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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, November is the cheapest month in which you can book a flight from Colorado to Bulgaria (average of $632). Flying from Colorado to Bulgaria in June is currently the most expensive (average of $1,185). 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.

What is the cheapest time of day to fly from CO to BG?

Find hourly flight availability from Colorado to Bulgaria. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 22, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Colorado to Bulgaria as you normally would.

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 13h. Turkish Airlines provides one of the quickest options available for as low as $601. Colorado and Bulgaria are separated by a distance of 5871 mi. This flight may include one or multiple stops.

  • 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, November is the cheapest month in which you can book a flight from Colorado to Bulgaria (average of $632). Flying from Colorado to Bulgaria in June is currently the most expensive (average of $1,185). 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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See prices for flight routes from nearby airports that may be better suited for you.
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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 August 22, 2025.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapest$522Average$836FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$672Average$1,152FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$687Average$874FlexibilityNo cancel feeOn-time69%

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