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Sofia

$335+ Cheap flights from Denver (DEN) to Sofia (SOF)

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 8/20. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SOF
Sep 3 — Sep 101
Thu 9/3
Thu 9/10
1 adult, Economy
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Cheap flight deals from Denver to Sofia

Cheapest flights from Denver to Sofia
Explore the most affordable flight options available from Denver to Sofia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 4, 2026.

This Turkish Airlines deal was found by Cheapflights users on 7/31. 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.
Sat 10/38:30 pm
DEN
-
SOF
1 stop33h 30m
Turkish Airlines
Tue 10/139:35 am
SOF
-
DEN
1 stop17h 50m
Turkish Airlines
Deal found 7/31$730
This Turkish Airlines deal was found by Cheapflights users on 8/1. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/138:30 pm
DEN
-
SOF
1 stop33h 30m
Turkish Airlines
Fri 8/283:50 pm
SOF
-
DEN
1 stop35h 35m
Turkish Airlines
Deal found 8/1$746
This oojo deal was found by Cheapflights users on 7/31. 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 11/54:15 pm
DEN
-
SOF
1 stop17h 05m
Lufthansa
Mon 11/92:00 pm
SOF
-
DEN
1 stop33h 30m
Lufthansa
Deal found 7/31$779
This Air Canada deal was found by Cheapflights users on 8/2. 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.
Thu 11/511:48 am
DEN
-
SOF
2 stops21h 32m
Multiple Airlines
Mon 11/97:00 pm
SOF
-
DEN
2 stops34h 27m
Multiple Airlines
Deal found 8/2$810
This oojo deal was found by Cheapflights users on 7/31. 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.
Mon 9/144:15 pm
DEN
-
SOF
1 stop17h 25m
Lufthansa
Mon 9/217:25 pm
SOF
-
DEN
1 stop27h 20m
Lufthansa
Deal found 7/31$819
This Gotogate deal was found by Cheapflights users on 7/31. 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.
Mon 9/1411:25 am
DEN
-
SOF
2 stops21h 35m
Multiple Airlines
Mon 9/217:25 pm
SOF
-
DEN
1 stop27h 20m
Multiple Airlines
Deal found 7/31$836
This Trip.com deal was found by Cheapflights users on 8/3. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/178:30 pm
DEN
-
SOF
1 stop33h 30m
Turkish Airlines
Thu 9/249:35 am
SOF
-
DEN
1 stop17h 50m
Turkish Airlines
Deal found 8/3$838

Find flight deals from Denver to Sofia

Discover tips and strategies to find the most affordable flight options for your journey from Denver (DEN) to Sofia (SOF). 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 August 4, 2026.

Most accurate provider

Ovago
3 stars

Most trusted provider

Ovago
3 stars

Round-trip from

$730
(Turkish Airlines)

One-way from

$335
(Kiwi.com)

Popular in

December

Cheapest in

November

Average price

$829
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 Denver Intl to Sofia
Search Deals
One-way flight from Denver Intl to Sofia
Search Deals
Highest demand for flights based on searches. 3% potential increase in price ($31 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($24 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Denver to Sofia 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 4, 2026.
Use the filters below to find and compare flights from Denver to Sofia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Sat 10/3

8:30 pm-3:00 pm

1 stop33h 30m

Sofia

Tue 10/13

9:35 am-6:25 pm

1 stop17h 50m

$730
Quickest round-trip

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Sun 1/31

4:15 pm-6:20 pm

1 stop17h 05m

Sofia

Thu 2/4

6:25 am-1:40 pm

1 stop16h 15m

$735

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Sun 1/31

11:20 am-1:15 pm

2 stops16h 55m

Sofia

Thu 2/4

6:25 am-6:13 pm

2 stops20h 48m

$740

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Fri 1/22

7:30 pm-8:50 am

1 stop28h 20m

Sofia

Tue 1/26

9:45 pm-5:25 pm

1 stop28h 40m

$791

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Fri 1/22

8:17 am-1:15 pm

2 stops19h 58m

Sofia

Tue 1/26

6:25 am-9:25 pm

2 stops24h 00m

$802
Cheapest one-way

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Thu 8/20

4:40 pm-11:40 am

2 stops34h 00m

$335

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Sat 8/15

6:00 am-6:50 pm

3 stops51h 50m

$2,251

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Mon 8/10

2:21 pm-2:30 pm

2 stops39h 09m

$2,499

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Sun 8/16

8:10 pm-2:15 pm

2 stops33h 05m

$3,172
Quickest one-way

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Tue 8/11

8:30 pm-8:20 pm

1 stop14h 50m

$3,896

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/31

Showing 1-10 of 12 resultsSorted by cheapest first
1
2

Compare providers for flights from Denver to Sofia

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Denver to Sofia in August.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
OvagoPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
GurufarePrice Accuracy3 starsTrust Score*3 stars
Justfly.comPrice Accuracy3 starsTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Denver-Sofia flights, users find the pricing of Ovago to be most consistent on Cheapflights vs. Ovago Users can find the same prices on Denver-Sofia flight deals on Cheapflights vs. Ovago >95% of the time. Price accuracy is based on data collected from Denver-Sofia flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Denver-Sofia flights, Cheapflights users trust Ovago the most. Ovago 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 Denver-Sofia 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 Denver to Sofia

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

How far ahead should I book a flight from Denver to Sofia?

The price you pay for your flight from Denver to Sofia may vary depending on when you book. For the best chance of a lower fare, look to book 36 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Denver to Sofia?

Currently, November is the cheapest month in which you can book a flight from Denver to Sofia (average of $600). Flying from Denver to Sofia in December is currently the most expensive (average of $1,026). 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.

How much does it cost to fly round-trip from Denver to Sofia?

Airfare is typical for this route at the moment.

Denver to Sofia flights typically cost between $549 and $1,060 in October.
The cheapest round-trip price found within the last 5 days was $730 on Turkish Airlines (Oct 3-Oct 13).

Reviews of airlines servicing Sofia

Get insights into the airlines that provide service to Sofia. 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 Sofia. Reviews last updated August 4, 2026.
See what other customers who have flown with Turkish Airlines,United Airlines, andLufthansa from Denver to Sofia have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Turkish Airlines
7.4
Good
4,464 reviews

Entertainment

7.5

Crew

7.8

Comfort

7.3

Boarding

7.3

Food

7.5

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

MIA - IST

The cabin is very clean, the service is great, the food is excellent
Turkish Airlines
7.4
Good
4,464 reviews
Turkish Airlines
7.4
Good
4,464 reviews

Entertainment

7.5

Crew

7.8

Comfort

7.3

Boarding

7.3

Food

7.5

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

MIA - IST

The cabin is very clean, the service is great, the food is excellent
United Airlines
7.4
Good
10,058 reviews
Turkish Airlines
7.4
Good
4,464 reviews

Entertainment

7.5

Crew

7.8

Comfort

7.3

Boarding

7.3

Food

7.5

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

MIA - IST

The cabin is very clean, the service is great, the food is excellent
Lufthansa
6.8
Okay
8,174 reviews
Turkish Airlines
7.4
Good
4,464 reviews

Entertainment

7.5

Crew

7.8

Comfort

7.3

Boarding

7.3

Food

7.5

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

MIA - IST

The cabin is very clean, the service is great, the food is excellent

Related info for your journey

Find useful and relevant information for your journey from Denver to Sofia. 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 Denver to Sofia?

    There are many flights that can get you from Denver to Sofia in 17h 05m. Fly via Turkish Airlines or United Airlines to get the fastest option. Denver and Sofia are separated by a distance of 5871 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    Our cheapest airline available from Denver to Sofia is Turkish Airlines. Our recent data shows that you can find tickets from as low as $568 on this airline. Additional options worth looking into are Lufthansa and United Airlines, starting at $634 and $686 round-trip. Turkish Airlines is currently priced 26% below the average price you’ll pay for this route.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Denver to Sofia 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 Denver to Sofia?

    Currently, November is the cheapest month in which you can book a flight from Denver to Sofia (average of $600). Flying from Denver to Sofia in December is currently the most expensive (average of $1,026). 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

Browse thousands of different options on Cheapflights for your next trip

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Complete your trip

Complete your trip to Sofia by adding a car rental and/or hotel reservation to your travel itinerary.
Sofia car rentals
Sofia Airport car rentals
Plovdiv Airport car rentals

Top 3 airlines flying from Denver to Sofia

Discover the top 3 airlines that operate flights from Denver to Sofia. 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 4, 2026.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapest$568Average$633FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$634Average$982FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$686Average$1,003FlexibilityNo cancel feeOn-time69%

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