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$478+ Cheap flights from Breckenridge, CO 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 10/15. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SOF
Oct 31 — Nov 71
Fri 10/31
Fri 11/7
1 adult, Economy
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Cheap flight deals from Breckenridge to Bulgaria

Keep the following information in mind while searching for Breckenridge to Bulgaria flight deals. Data was last updated October 1, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$557
(Kiwi.com)

One-way from

$478
(Mytrip)

Popular in

May

Cheapest in

April

Average price

$642
Provider with most accurate pricing for Denver Intl-Sofia flight deals.
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Provider most trusted by Cheapflights users for Denver Intl-Sofia flights.
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From Breckenridge to Bulgaria
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One-way flight from Breckenridge to Bulgaria
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Highest demand for flights based on searches. 11% potential increase in price ($110 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($36 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find flight deals from Breckenridge to Bulgaria

Cheapest flights from Breckenridge to Bulgaria
Explore the most affordable flight options available from Breckenridge to Bulgaria. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 1, 2025.

This FlightHub deal was found by Cheapflights users on 9/29. 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 stop34h 50mTurkish Airlines
Sat 11/89:35 amSOF - DEN
1 stop17h 00mTurkish Airlines
Deal found 9/29$563
This Cheapflightsfares deal was found by Cheapflights users on 10/1. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/295:20 pmDEN - SOF
1 stop17h 00mLufthansa
Tue 11/116:00 amSOF - DEN
1 stop19h 00mLufthansa
Deal found 10/1$572
This FlightHub deal was found by Cheapflights users on 10/1. 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.
Thu 10/308:20 pmDEN - SOF
1 stop34h 50mTurkish Airlines
Tue 11/119:35 amSOF - DEN
1 stop17h 00mTurkish Airlines
Deal found 10/1$573
This FlightHub deal was found by Cheapflights users on 10/1. 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.
Mon 11/34:05 pmDEN - SOF
2 stops17h 15mLufthansa
Wed 11/126:10 amSOF - DEN
1 stop18h 50mLufthansa
Deal found 10/1$575
This Air Canada deal was found by Cheapflights users on 9/30. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/28:45 amDEN - SOF
2 stops24h 35mMultiple Airlines
Thu 12/116:00 amSOF - DEN
2 stops35h 53mMultiple Airlines
Deal found 9/30$578
This United Airlines deal was found by Cheapflights users on 9/30. 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 11/184:06 pmDEN - SOF
2 stops17h 14mUnited Airlines
Thu 11/276:00 amSOF - DEN
2 stops22h 55mUnited Airlines
Deal found 9/30$579
This FlightHub deal was found by Cheapflights users on 10/1. 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 10/295:20 pmDEN - SOF
1 stop21h 25mLufthansa
Mon 11/107:05 pmSOF - DEN
1 stop28h 30mLufthansa
Deal found 10/1$583
This KLM deal was found by Cheapflights users on 9/28. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/411:26 amDEN - SOF
2 stops17h 29mMultiple Airlines
Wed 11/127:00 amSOF - DEN
2 stops20h 55mMultiple Airlines
Deal found 9/28$585
This Air France deal was found by Cheapflights users on 9/29. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1810:18 amDEN - SOF
2 stops18h 37mMultiple Airlines
Thu 11/277:00 amSOF - DEN
2 stops17h 54mMultiple Airlines
Deal found 9/29$586
This Lufthansa deal was found by Cheapflights users on 9/30. 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.
Fri 11/74:20 pmDEN - VAR
2 stops37h 55mLufthansa
Tue 11/114:00 pmVAR - DEN
2 stops33h 00mLufthansa
Deal found 9/30$1,456

Cheapflights Fare Finder

 
Customize your flight search to find flights from Breckenridge 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 October 1, 2025.
Use the filters below to find and compare flights from Breckenridge to Bulgaria that are best for you.

Fly from

Breckenridge

Fly to

Bulgaria

Route

Depart

Return

Price

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Tue 10/28

8:20 pm-8:45 am

1 stop28h 25m

Sofia

Sat 11/8

9:35 am-5:35 pm

1 stop17h 00m

$563

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Thu 10/30

8:20 pm-8:50 pm

1 stop16h 30m

Sofia

Tue 11/11

9:35 am-5:35 pm

1 stop17h 00m

$563

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Tue 12/2

4:20 pm-6:20 pm

1 stop17h 00m

Sofia

Thu 12/11

6:00 am-4:00 pm

1 stop19h 00m

$572

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Mon 11/3

4:20 pm-10:45 pm

1 stop21h 25m

Sofia

Wed 11/12

6:10 am-4:00 pm

1 stop18h 50m

$572

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Wed 10/29

4:05 pm-6:20 pm

2 stops18h 15m

Sofia

Tue 11/11

6:00 am-4:00 pm

1 stop19h 00m

$576

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Tue 11/18

4:06 pm-10:45 pm

2 stops21h 39m

Sofia

Thu 11/27

6:00 am-4:00 pm

1 stop19h 00m

$579

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Wed 10/29

5:20 pm-10:45 pm

1 stop21h 25m

Sofia

Mon 11/10

7:05 pm-2:35 pm

1 stop28h 30m

$583

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Tue 11/4

11:26 am-1:55 pm

2 stops17h 29m

Sofia

Wed 11/12

7:00 am-6:55 pm

2 stops20h 55m

$585

DenverVarna

DEN - VAR

DENVAR

Denver Intl

Fri 11/7

4:20 pm-3:15 pm

2 stops37h 55m

Varna

Tue 11/11

4:00 pm-4:00 pm

2 stops33h 00m

$1,456

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Wed 10/15

11:15 am-5:55 pm

2 stops21h 40m

$478

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/30

Showing 1-10 of 14 results
1
2

Best time to book a flight from Breckenridge to Bulgaria

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

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

Currently, November is the cheapest month in which you can book a flight from Breckenridge to Bulgaria (average of $632). Flying from Breckenridge to Bulgaria in June is currently the most expensive (average of $1,178). 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 BK9 to BG?

Find hourly flight availability from Breckenridge 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 October 1, 2025.

When flying from Breckenridge to Bulgaria, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Reviews of airlines servicing Bulgaria

Get insights into the airlines that provide service to Bulgaria. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Bulgaria. Reviews last updated October 1, 2025.
Get a feel of what it's like to fly with United Airlines, Turkish Airlines, and Lufthansa from Breckenridge to Bulgaria by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,929 reviews

Crew

8.1

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Overall

7.4

Food

6.6

Reviews

1 / 20
4.0
Okay

Tim,Sep 2025

IAD - GSP

This was pretty bad. It’s chaos at the Dulles boarding gates for the small regional jets because they use one gate to board 3-4 flights at a time. So, it’s difficult knowing where and when to go. There is little space for any size of carrry-on, so most had to gate check their bags. However, the worst of it was that our single flight attendant fell asleep before we took off and the pilot couldn’t do so until she responded to his messages. My wife had to wake her up! So we were a little late leaving. Not to be thwarted, the flight attendant fell asleep right after take off and there was no sight of her during the flight. When the aircraft touched down, a tray of unsecured canned drinks came crashing onto the aisle up front. I can only assume someone didn’t do what they were supposed to. The pilot was great, but I’m sure he must not be happy with this crew member.
United Airlines
7.4
Good
8,929 reviews
United Airlines
7.4
Good
8,929 reviews

Crew

8.1

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Overall

7.4

Food

6.6

Reviews

1 / 20
4.0
Okay

Tim,Sep 2025

IAD - GSP

This was pretty bad. It’s chaos at the Dulles boarding gates for the small regional jets because they use one gate to board 3-4 flights at a time. So, it’s difficult knowing where and when to go. There is little space for any size of carrry-on, so most had to gate check their bags. However, the worst of it was that our single flight attendant fell asleep before we took off and the pilot couldn’t do so until she responded to his messages. My wife had to wake her up! So we were a little late leaving. Not to be thwarted, the flight attendant fell asleep right after take off and there was no sight of her during the flight. When the aircraft touched down, a tray of unsecured canned drinks came crashing onto the aisle up front. I can only assume someone didn’t do what they were supposed to. The pilot was great, but I’m sure he must not be happy with this crew member.
Turkish Airlines
7.3
Good
3,984 reviews
United Airlines
7.4
Good
8,929 reviews

Crew

8.1

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Overall

7.4

Food

6.6

Reviews

1 / 20
4.0
Okay

Tim,Sep 2025

IAD - GSP

This was pretty bad. It’s chaos at the Dulles boarding gates for the small regional jets because they use one gate to board 3-4 flights at a time. So, it’s difficult knowing where and when to go. There is little space for any size of carrry-on, so most had to gate check their bags. However, the worst of it was that our single flight attendant fell asleep before we took off and the pilot couldn’t do so until she responded to his messages. My wife had to wake her up! So we were a little late leaving. Not to be thwarted, the flight attendant fell asleep right after take off and there was no sight of her during the flight. When the aircraft touched down, a tray of unsecured canned drinks came crashing onto the aisle up front. I can only assume someone didn’t do what they were supposed to. The pilot was great, but I’m sure he must not be happy with this crew member.
Lufthansa
6.8
Okay
7,443 reviews
United Airlines
7.4
Good
8,929 reviews

Crew

8.1

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Overall

7.4

Food

6.6

Reviews

1 / 20
4.0
Okay

Tim,Sep 2025

IAD - GSP

This was pretty bad. It’s chaos at the Dulles boarding gates for the small regional jets because they use one gate to board 3-4 flights at a time. So, it’s difficult knowing where and when to go. There is little space for any size of carrry-on, so most had to gate check their bags. However, the worst of it was that our single flight attendant fell asleep before we took off and the pilot couldn’t do so until she responded to his messages. My wife had to wake her up! So we were a little late leaving. Not to be thwarted, the flight attendant fell asleep right after take off and there was no sight of her during the flight. When the aircraft touched down, a tray of unsecured canned drinks came crashing onto the aisle up front. I can only assume someone didn’t do what they were supposed to. The pilot was great, but I’m sure he must not be happy with this crew member.

Related info for your journey

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

    Airlines like Turkish Airlines and Lufthansa fly from Breckenridge to Bulgaria in about 17h. The time it takes to get you to your destination can typically vary by up to 11h 25m. The distance between Breckenridge and Bulgaria is about 5871 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

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

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

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

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

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

    Currently, November is the cheapest month in which you can book a flight from Breckenridge to Bulgaria (average of $632). Flying from Breckenridge to Bulgaria in June is currently the most expensive (average of $1,178). 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.

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Top 3 airlines flying from Breckenridge to Bulgaria

Discover the top 3 airlines that operate flights from Breckenridge 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 October 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapest$522Average$632FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$656Average$836FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$715Average$1,159FlexibilityNo cancel feeOn-time76%

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