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$847+ Cheap flights from Sofia (SOF) to Denver (DEN)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/11. Fares are subject to change and may not be available on all flights or dates of travel.
SOF — DEN
Mar 18 — Mar 251
Wed 3/18
Wed 3/25
1 adult, Economy
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Cheap flight deals from Sofia to Denver

Cheapest flights from Sofia to Denver
Explore the most affordable flight options available from Sofia to Denver. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 16, 2026.

This Orbitz deal was found by Cheapflights users on 2/13. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/114:05 pm
SOF
-
DEN
2 stops39h 50m
Multiple Airlines
Tue 10/206:40 pm
DEN
-
SOF
1 stop16h 50m
Multiple Airlines
Deal found 2/13$847
This oojo deal was found by Cheapflights users on 2/13. 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.
Thu 6/119:35 am
SOF
-
DEN
1 stop17h 50m
Turkish Airlines
Tue 10/208:25 pm
DEN
-
SOF
1 stop33h 35m
Turkish Airlines
Deal found 2/13$858
This United Airlines deal was found by Cheapflights users on 2/16. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/96:10 am
SOF
-
DEN
1 stop16h 30m
United Airlines
Sun 3/159:20 pm
DEN
-
SOF
1 stop13h 00m
United Airlines
Deal found 2/16$877
This United Airlines deal was found by Cheapflights users on 2/16. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/236:10 am
SOF
-
DEN
1 stop16h 20m
United Airlines
Tue 7/215:40 pm
DEN
-
SOF
1 stop20h 10m
United Airlines
Deal found 2/16$879
This Gotogate deal was found by Cheapflights users on 2/15. 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.
Wed 3/256:05 am
SOF
-
DEN
1 stop17h 30m
Lufthansa
Tue 3/314:05 pm
DEN
-
SOF
1 stop17h 35m
Lufthansa
Deal found 2/15$886

Find flight deals from Sofia to Denver

Discover tips and strategies to find the most affordable flight options for your journey from Sofia (SOF) to Denver (DEN). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated February 16, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$847
(Orbitz)

Popular in

May

Cheapest in

February

Average price

$750
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 Sofia to Denver Intl
Search Deals
Highest demand for flights based on searches. 1% potential increase in price ($17 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($20 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Sofia 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 February 16, 2026.
Use the filters below to find and compare flights from Sofia to Denver that are best for you.

Fly from

Sofia

Fly to

Denver

Route

Depart

Return

Price

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Thu 6/11

4:05 pm-10:55 pm

2 stops39h 50m

Denver Intl

Tue 10/20

6:40 pm-8:30 pm

1 stop16h 50m

$847

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Thu 6/11

9:35 am-6:25 pm

1 stop17h 50m

Denver Intl

Tue 10/20

8:25 pm-3:00 pm

1 stop33h 35m

$858

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Mon 3/9

6:10 am-2:40 pm

1 stop16h 30m

Denver Intl

Sun 3/15

9:20 pm-6:20 pm

1 stop13h 00m

$877

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Tue 6/23

6:10 am-1:30 pm

1 stop16h 20m

Denver Intl

Tue 7/21

5:40 pm-10:50 pm

1 stop20h 10m

$879

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Tue 6/23

2:10 pm-10:33 am

2 stops29h 23m

Denver Intl

Tue 7/21

9:40 am-1:05 pm

2 stops18h 25m

$882

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/13

  • Most accurate provider: When it comes to deals on Sofia-Denver flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Sofia-Denver flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Sofia-Denver flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Sofia-Denver flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Sofia-Denver flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Sofia to Denver

Have a flexible travel schedule? Discover the best time to fly to Denver from Sofia 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.

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 February 16, 2026.
Get a feel of what it's like to fly with United Airlines, Turkish Airlines, and Lufthansa from Sofia to Denver 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
9,308 reviews

Comfort

7.3

Overall

7.4

Crew

8.1

Food

6.6

Entertainment

7.1

Boarding

7.7

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
9,308 reviews
United Airlines
7.4
Good
9,308 reviews

Comfort

7.3

Overall

7.4

Crew

8.1

Food

6.6

Entertainment

7.1

Boarding

7.7

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
4,219 reviews
United Airlines
7.4
Good
9,308 reviews

Comfort

7.3

Overall

7.4

Crew

8.1

Food

6.6

Entertainment

7.1

Boarding

7.7

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
7,787 reviews
United Airlines
7.4
Good
9,308 reviews

Comfort

7.3

Overall

7.4

Crew

8.1

Food

6.6

Entertainment

7.1

Boarding

7.7

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 Sofia to Denver. 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 Sofia to Denver?

    A quick flight from Sofia to Denver can take about 16h 30m. Turkish Airlines provides one of the quickest options available for as low as $877. The distance from Sofia to Denver is about 5871 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines flying from Sofia to Denver round-trip?

    Turkish Airlines, at $704, was found to be the cheapest airline from Sofia to Denver.Alternate airlines to your destination round-trip include United Airlines and Lufthansa. Turkish Airlines is priced at 21% lower than the current average price of a flight leaving 3 months from now.

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

    $753 is the cheapest one-way deal found within the past few days, from Turkish Airlines. You may also be able to find cheap deals on Lufthansa and United Airlines, with prices starting from $771 and $845, respectively.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Sofia 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
Cripple Creek
Winter Park
Central City
Glendale
Manitou Springs
Frisco
Fort Morgan
Brighton
Evergreen

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Top 3 airlines flying from Sofia to Denver

Discover the top 3 airlines that operate flights from Sofia 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 February 16, 2026.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapest$704Average$860FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$729Average$809FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$767Average$1,014FlexibilityNo cancel feeOn-time76%

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