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$500+ Cheap flights from Bulgaria to Denver (DEN)

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 4/12. Fares are subject to change and may not be available on all flights or dates of travel.
SOF — DEN
Apr 17 — Apr 241
Fri 4/17
Fri 4/24
1 adult, Economy
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Cheap flight deals from Bulgaria to Denver

Cheapest flights from Bulgaria to Denver
Explore the most affordable flight options available from Bulgaria to Denver. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 18, 2026.

This oojo deal was found by Cheapflights users on 3/18. 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.
Sun 5/39:35 am
SOF
-
DEN
1 stop17h 50m
Turkish Airlines
Sun 5/108:25 pm
DEN
-
SOF
1 stop33h 35m
Turkish Airlines
Deal found 3/18$831
This Lufthansa deal was found by Cheapflights users on 3/16. 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.
Thu 4/306:30 am
SOF
-
DEN
1 stop16h 05m
Lufthansa
Thu 5/74:05 pm
DEN
-
SOF
1 stop17h 35m
Lufthansa
Deal found 3/16$902
This United Airlines deal was found by Cheapflights users on 3/18. 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 5/36:20 am
SOF
-
DEN
1 stop16h 15m
United Airlines
Sun 5/108:25 pm
DEN
-
SOF
1 stop13h 15m
United Airlines
Deal found 3/18$908
This Justfly.com deal was found by Cheapflights users on 3/18. 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.
Sun 5/36:20 am
SOF
-
DEN
2 stops21h 40m
Air Canada
Sun 5/1011:30 am
DEN
-
SOF
2 stops15h 40m
Air Canada
Deal found 3/18$919

Find flight deals from Bulgaria to Denver

Keep the following information in mind while searching for Bulgaria to Denver flight deals. Data was last updated March 18, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$831
(oojo)

One-way from

$500
(Kiwi.com)

Popular in

May

Cheapest in

September

Average price

$1,021
Provider with most accurate pricing for Sofia-Denver Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Sofia-Denver Intl flights.
Search Deals
From Bulgaria to Denver Intl
Search Deals
One-way flight from Bulgaria to Denver Intl
Search Deals
High demand for flights, 0% potential price rise
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($18 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 Bulgaria to Denver 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 18, 2026.
Use the filters below to find and compare flights from Bulgaria to Denver that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Sun 5/3

9:35 am-6:25 pm

1 stop17h 50m

Denver Intl

Sun 5/10

8:25 pm-3:00 pm

1 stop33h 35m

$831

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Thu 4/30

6:30 am-1:35 pm

1 stop16h 05m

Denver Intl

Thu 5/7

4:05 pm-6:40 pm

1 stop17h 35m

$902
Quickest round-trip

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Sun 5/3

6:20 am-1:35 pm

1 stop16h 15m

Denver Intl

Sun 5/10

8:25 pm-6:40 pm

1 stop13h 15m

$908

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Sun 5/3

6:20 am-7:00 pm

2 stops21h 40m

Denver Intl

Sun 5/10

11:30 am-12:10 pm

2 stops15h 40m

$919

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Mon 4/6

2:35 pm-11:04 pm

2 stops41h 29m

Denver Intl

Wed 4/8

11:59 pm-6:00 pm

2 stops33h 01m

$1,320

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Sun 5/3

8:10 am-7:00 pm

2 stops19h 50m

Denver Intl

Sun 5/10

4:40 pm-12:10 am

3 stops22h 30m

$1,339
Cheapest one-way

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Mon 4/6

5:00 pm-11:09 pm

3 stops39h 09m

$597

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Tue 4/7

11:25 pm-7:00 pm

2 stops28h 35m

$643

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Sun 3/29

4:05 pm-10:59 pm

2 stops39h 54m

$692

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Sun 4/12

9:55 am-7:00 pm

2 stops42h 05m

$693

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/15

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

Have a flexible travel schedule? Discover the best time to fly to Denver from Bulgaria 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 Bulgaria to Denver
No data available for this route at this time. Please check back soon.

Reviews of airlines servicing Denver

Get insights into the airlines that provide service to Denver. 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 Denver. Reviews last updated March 18, 2026.
See what other customers who have flown with United Airlines,Turkish Airlines, andLufthansa from Bulgaria to Denver have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,434 reviews

Comfort

7.3

Overall

7.4

Crew

8.1

Entertainment

7.1

Boarding

7.7

Food

6.6

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats
United Airlines
7.4
Good
9,434 reviews
United Airlines
7.4
Good
9,434 reviews

Comfort

7.3

Overall

7.4

Crew

8.1

Entertainment

7.1

Boarding

7.7

Food

6.6

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats
Turkish Airlines
7.3
Good
4,258 reviews
United Airlines
7.4
Good
9,434 reviews

Comfort

7.3

Overall

7.4

Crew

8.1

Entertainment

7.1

Boarding

7.7

Food

6.6

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats
Lufthansa
6.8
Okay
7,858 reviews
United Airlines
7.4
Good
9,434 reviews

Comfort

7.3

Overall

7.4

Crew

8.1

Entertainment

7.1

Boarding

7.7

Food

6.6

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats

Related info for your journey

Find useful and relevant information for your journey from Bulgaria to Denver. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Denver from Bulgaria?

    Denver Intl (DEN), located 18.5 mi from the city center, is the airport you fly into when you book flights from Bulgaria to Denver.

  • How long is the flight from Bulgaria to Denver?

    Turkish Airlines and Lufthansa can get you from Bulgaria to Denver in just under 16h 05m. Your travel time can differ by up to 1h 45m. There are 5871 mi between Bulgaria and Denver. This flight may include one or multiple stops.

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

    The cheapest airlines for a one-way flight from Bulgaria to Denver are Turkish Airlines ($753), Lufthansa ($771), and United Airlines ($845).

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Bulgaria to Denver by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Traveling to a place near Denver?

Book flights to Denver if you plan to visit one of these locations
Thornton
Black Hawk
Lakewood
Broomfield
Westminster
Golden
Centennial
Greeley
Lone Tree
Wheat Ridge
Silverthorne
Central City
Cripple Creek
Winter Park
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Frisco
Englewood
Fort Morgan
Brighton

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Top 3 airlines flying from Bulgaria to Denver

Discover the top 3 airlines that operate flights from Bulgaria to Denver. 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 18, 2026.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapest$704Average$860FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$763Average$861FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$784Average$1,013FlexibilityNo cancel feeOn-time76%

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