$302+ Cheap flights from Denver (DEN) to Sofia (SOF)
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 12/8. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SOF
Nov 29 — Dec 61
Round-trip
1 adult, Economy
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Find cheap flights from Denver to Sofia with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Denver to Sofia
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Best
Last-minute
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Cheapest flights from Denver to SofiaExplore 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 October 30, 2026.
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 October 30, 2026.
This FlightHub deal was found by Cheapflights users on 10/26. 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 11/307:30 pm -
1 stop28h 10m
Wed 12/239:30 am -
1 stop16h 55m
Deal found 10/26![Turkish Airlines logo]()
$698
This Justfly.com deal was found by Cheapflights users on 10/27. 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 11/87:30 pm -
1 stop28h 10m
Sun 12/69:30 am -
1 stop16h 55m
Deal found 10/27![Turkish Airlines logo]()
$788
This FlightHub deal was found by Cheapflights users on 10/29. 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.
Mon 11/304:15 pm -
1 stop21h 40m
Wed 12/236:25 am -
2 stops26h 28m
Deal found 10/29![Lufthansa logo]()
$794
This United Airlines deal was found by Cheapflights users on 10/26. 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 11/304:15 pm -
1 stop21h 40m
Wed 12/236:00 am -
2 stops26h 29m
Deal found 10/26![United Airlines logo]()
$803
This Turkish Airlines deal was found by Cheapflights users on 10/26. 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 11/53:30 pm -
2 stops20h 25m
Mon 11/99:30 am -
1 stop16h 55m
Deal found 10/26![Multiple Airlines logo]()
$844
This FlightHub deal was found by Cheapflights users on 10/28. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/103:01 pm -
2 stops39h 09m
Sat 11/144:00 pm -
1 stop34h 25m
Deal found 10/28![Turkish Airlines logo]()
$879
This FlightHub deal was found by Cheapflights users on 10/27. 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.
Sun 11/84:15 pm -
2 stops16h 55m
Sun 12/66:25 am -
2 stops26h 57m
Deal found 10/27![Lufthansa logo]()
$926
Best flights from Denver to SofiaDiscover carefully curated flight deals from Denver to Sofia that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 30, 2026.
Discover carefully curated flight deals from Denver to Sofia that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 30, 2026.
This FlightHub deal was found by Cheapflights users on 10/26. 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 11/307:30 pm -
1 stop28h 10m
Wed 12/239:30 am -
1 stop16h 55m
Deal found 10/26![Turkish Airlines logo]()
$698
This United deal was found by Cheapflights users on 10/27. 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.
Wed 2/248:30 pm -
1 stop17h 25m
Wed 3/36:25 am -
2 stops23h 01m
Deal found 10/27![Multiple Airlines logo]()
$731
This United Airlines deal was found by Cheapflights users on 10/25. 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 3/23:55 pm -
1 stop22h 05m
Fri 3/56:25 am -
2 stops23h 01m
Deal found 10/25![United Airlines logo]()
$733
This Booking.com deal was found by Cheapflights users on 10/28. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/89:44 am -
2 stops18h 41m
Wed 2/177:05 pm -
1 stop28h 25m
Deal found 10/28![Multiple Airlines logo]()
$760
Last-minute flights from Denver to SofiaDiscover last-minute flight deals from Denver to Sofia. Data last updated October 30, 2026 and is based on user searches.
Discover last-minute flight deals from Denver to Sofia. Data last updated October 30, 2026 and is based on user searches.
This Turkish Airlines deal was found by Cheapflights users on 10/26. 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 11/53:30 pm -
2 stops20h 25m
Mon 11/99:30 am -
1 stop16h 55m
Deal found 10/26![Multiple Airlines logo]()
$844
This Justfly.com deal was found by Cheapflights users on 10/27. 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 11/87:30 pm -
1 stop28h 10m
Sun 12/69:30 am -
1 stop16h 55m
Deal found 10/27![Turkish Airlines logo]()
$788
This FlightHub deal was found by Cheapflights users on 10/27. 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.
Sun 11/84:15 pm -
2 stops16h 55m
Sun 12/66:25 am -
2 stops26h 57m
Deal found 10/27![Lufthansa logo]()
$926
This FlightHub deal was found by Cheapflights users on 10/28. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/103:01 pm -
2 stops39h 09m
Sat 11/144:00 pm -
1 stop34h 25m
Deal found 10/28![Turkish Airlines logo]()
$879
This FlightHub deal was found by Cheapflights users on 10/26. 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 11/307:30 pm -
1 stop28h 10m
Wed 12/239:30 am -
1 stop16h 55m
Deal found 10/26![Turkish Airlines logo]()
$698
This FlightHub deal was found by Cheapflights users on 10/29. 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.
Mon 11/304:15 pm -
1 stop21h 40m
Wed 12/236:25 am -
2 stops26h 28m
Deal found 10/29![Lufthansa logo]()
$794
This United Airlines deal was found by Cheapflights users on 10/26. 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 11/304:15 pm -
1 stop21h 40m
Wed 12/236:00 am -
2 stops26h 29m
Deal found 10/26![United Airlines logo]()
$803
One-way flights from Denver to SofiaSearch for one-way flight options from Denver to Sofia. Find affordable one-way fares based on user searches. Data last updated October 30, 2026.
Search for one-way flight options from Denver to Sofia. Find affordable one-way fares based on user searches. Data last updated October 30, 2026.
This Kiwi.com deal was found by Cheapflights users on 10/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/83:40 pm -
3 stops57h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/30![Multiple Airlines logo]()
$302
This Kiwi.com deal was found by Cheapflights users on 10/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/93:40 pm -
3 stops57h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/30![Multiple Airlines logo]()
$316
This Kiwi.com deal was found by Cheapflights users on 10/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/103:40 pm -
3 stops32h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/30![Multiple Airlines logo]()
$320
This British Airways deal was found by Cheapflights users on 10/25. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/25:01 pm -
1 stop18h 09m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/25![British Airways logo]()
$335
This United Airlines deal was found by Cheapflights users on 10/25. 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 2/14:15 pm -
1 stop21h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/25![United Airlines logo]()
$338
This Air Canada deal was found by Cheapflights users on 10/25. 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.
Wed 2/311:25 am -
2 stops26h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/25![Multiple Airlines logo]()
$341
This Kiwi.com deal was found by Cheapflights users on 10/25. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/13:40 pm -
3 stops58h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/25![Multiple Airlines logo]()
$346
This Kiwi.com deal was found by Cheapflights users on 10/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/73:40 pm -
2 stops37h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/30![Multiple Airlines logo]()
$350
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 October 30, 2026.
Most accurate provider | Ovago 3 stars |
|---|---|
Most trusted provider | Ovago 3 stars |
Round-trip from | $698 (FlightHub) |
One-way from | $302 (Kiwi.com) |
Popular in | December |
Cheapest in | March |
Average price | $698 |
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 7,457,451 searches. Data last updated October 30, 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
Cheapest round-trip
DenverSofia
DEN Denver Intl - SOF Sofia
DENSOF
Denver Intl
Thu 12/10
3:40 pm-9:30 am
3 stops32h 50m
Sofia
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$320
DenverSofia
DEN Denver Intl - SOF Sofia
DENSOF
Denver Intl
Mon 2/1
4:15 pm-10:55 pm
1 stop21h 40m
Sofia
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$338
DenverSofia
DEN Denver Intl - SOF Sofia
DENSOF
Denver Intl
Mon 12/7
3:40 pm-1:55 pm
2 stops37h 15m
Sofia
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$350
DenverSofia
DEN Denver Intl - SOF Sofia
DENSOF
Denver Intl
Thu 2/4
7:33 am-7:20 pm
2 stops26h 47m
Sofia
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$386
DenverSofia
DEN Denver Intl - SOF Sofia
DENSOF
Denver Intl
Fri 2/5
4:15 pm-10:55 pm
1 stop21h 40m
Sofia
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$388
DenverSofia
DEN Denver Intl - SOF Sofia
DENSOF
Denver Intl
Wed 2/3
3:55 pm-11:00 pm
1 stop22h 05m
Sofia
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$470
DenverSofia
DEN Denver Intl - SOF Sofia
DENSOF
Denver Intl
Tue 12/8
5:01 pm-8:10 pm
1 stop18h 09m
Sofia
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$495
DenverSofia
DEN Denver Intl - SOF Sofia
DENSOF
Denver Intl
Wed 12/9
3:55 pm-11:00 pm
1 stop22h 05m
Sofia
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$515
Quickest round-trip
DenverSofia
DEN Denver Intl - SOF Sofia
DENSOF
Denver Intl
Sat 12/5
5:01 pm-6:35 pm
1 stop16h 34m
Sofia
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$545
DenverSofia
DEN Denver Intl - SOF Sofia
DENSOF
Denver Intl
Fri 12/4
4:15 pm-10:55 pm
1 stop21h 40m
Sofia
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$555
Showing 1-10 of 14 resultsSorted by cheapest first
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 October.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star |
- 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.
DEN-SOF
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 7 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, March is the cheapest month in which you can book a flight from Denver to Sofia (average of $623). Flying from Denver to Sofia in December is currently the most expensive (average of $1,173). 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.
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 October 30, 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.
Entertainment
7.5
Overall
7.4
Crew
7.8
Food
7.5
Comfort
7.3
Boarding
7.3
Reviews
1 / 20
10.0
ExcellentROBERTO,Oct 2026
MIA - ATH
Entertainment
7.5
Overall
7.4
Crew
7.8
Food
7.5
Comfort
7.3
Boarding
7.3
Reviews
1 / 20
10.0
ExcellentROBERTO,Oct 2026
MIA - ATH
Entertainment
7.5
Overall
7.4
Crew
7.8
Food
7.5
Comfort
7.3
Boarding
7.3
Reviews
1 / 20
10.0
ExcellentROBERTO,Oct 2026
MIA - ATH
Entertainment
7.5
Overall
7.4
Crew
7.8
Food
7.5
Comfort
7.3
Boarding
7.3
Reviews
1 / 20
10.0
ExcellentROBERTO,Oct 2026
MIA - ATH
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.
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Denver and Sofia flights
Browse other Denver and Sofia flight options. Last updated on October 30, 2026.
Other flights from Denver
Browse through other flights departing from Denver. Flights are based on user searches made on Cheapflights and were last updated on October 30, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to Sofia
Explore flights to Sofia departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on October 30, 2026.
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 7,457,451 searches. Data last updated October 30, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$571 | Average$718 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$661 | Average$974 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$768 | Average$1,003 | FlexibilityNo cancel fee | On-time69% |