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$655+ 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 2/17. Fares are subject to change and may not be available on all flights or dates of travel.
SOF — DEN
Jan 26 — Feb 21
Sun 1/26
Sun 2/2
1 adult, Economy
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Cheap 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 January 21, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$655
(British Airways)

Popular in

June

Cheapest in

November

Average price

$814
Provider with most accurate pricing for Sofia-Denver Intl flight deals.
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Provider most trusted by Cheapflights users for Sofia-Denver Intl flights.
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From Sofia to Denver Intl
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($55 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($25 potential savings vs. average RT price).
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Average for round-trip flights in January 2025
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Find 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 January 21, 2025.

This British Airways deal was found by Cheapflights users on 1/20. 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.
Mon 2/175:25 pmSOF - DEN
2 stops33h 32mBritish Airways
Sun 2/2312:32 pmDEN - SOF
2 stops18h 48mBritish Airways
Deal found 1/20$655
This American Airlines deal was found by Cheapflights users on 1/20. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/175:25 pmSOF - DEN
1 stop31h 00mAmerican Airlines
Sun 2/235:30 pmDEN - SOF
1 stop13h 50mAmerican Airlines
Deal found 1/20$699
This Air France deal was found by Cheapflights users on 1/21. 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.
Wed 3/197:00 amSOF - DEN
2 stops23h 49mAir France
Wed 3/2612:12 pmDEN - SOF
2 stops17h 53mAir France
Deal found 1/21$710
This United Airlines deal was found by Cheapflights users on 1/20. 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 6/36:20 amSOF - DEN
2 stops21h 00mUnited Airlines
Mon 6/238:25 pmDEN - SOF
1 stop17h 35mUnited Airlines
Deal found 1/20$718
This oojo deal was found by Cheapflights users on 1/21. 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 10/59:15 amSOF - DEN
1 stop17h 55mTurkish Airlines
Fri 10/318:35 pmDEN - SOF
1 stop34h 30mTurkish Airlines
Deal found 1/21$733
This Lufthansa deal was found by Cheapflights users on 1/20. 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.
Wed 6/46:00 amSOF - DEN
1 stop17h 20mLufthansa
Mon 6/234:05 pmDEN - SOF
1 stop21h 55mLufthansa
Deal found 1/20$739
This KLM deal was found by Cheapflights users on 1/20. 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.
Fri 1/317:00 amSOF - DEN
2 stops21h 46mKLM
Sun 2/97:10 amDEN - SOF
2 stops21h 55mKLM
Deal found 1/20$758
This oojo deal was found by Cheapflights users on 1/20. 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 6/56:15 amSOF - DEN
1 stop16h 10mMultiple Airlines
Sun 6/225:50 pmDEN - SOF
1 stop33h 40mMultiple Airlines
Deal found 1/20$760
This SWISS deal was found by Cheapflights users on 1/20. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/31:15 pmSOF - DEN
1 stop36h 05mSWISS
Sun 6/225:50 pmDEN - SOF
1 stop33h 40mSWISS
Deal found 1/20$766
This Mytrip deal was found by Cheapflights users on 1/21. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/56:20 amSOF - DEN
2 stops21h 57mAir Canada
Fri 10/3111:20 amDEN - SOF
2 stops22h 30mAir Canada
Deal found 1/21$773
This Iberia deal was found by Cheapflights users on 1/20. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/16:10 amSOF - DEN
2 stops22h 46mIberia
Thu 8/144:59 pmDEN - SOF
2 stops38h 31mIberia
Deal found 1/20$2,405

Find flights from Sofia to Denver within your budget

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 January 21, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Mon 2/17

5:25 pm-5:57 pm

2 stops33h 32m

Denver Intl

Sun 2/23

12:32 pm-4:20 pm

2 stops18h 48m

$655

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Mon 2/17

5:25 pm-3:25 pm

1 stop31h 00m

Denver Intl

Sun 2/23

5:30 pm-4:20 pm

1 stop13h 50m

$699

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Wed 3/19

7:00 am-10:49 pm

2 stops23h 49m

Denver Intl

Wed 3/26

12:12 pm-2:05 pm

2 stops17h 53m

$710

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Tue 6/3

6:20 am-6:20 pm

2 stops21h 00m

Denver Intl

Mon 6/23

8:25 pm-11:00 pm

1 stop17h 35m

$718

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Wed 6/4

6:00 am-6:35 pm

1 stop21h 35m

Denver Intl

Tue 6/24

8:25 pm-6:40 pm

1 stop13h 15m

$739

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Fri 1/31

7:00 am-7:46 pm

2 stops21h 46m

Denver Intl

Sun 2/9

7:10 am-2:05 pm

2 stops21h 55m

$758

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Thu 6/5

6:15 am-1:25 pm

1 stop16h 10m

Denver Intl

Sun 6/22

5:50 pm-12:30 pm

1 stop33h 40m

$760

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Tue 6/3

1:15 pm-4:20 pm

1 stop36h 05m

Denver Intl

Sun 6/22

5:50 pm-12:30 pm

1 stop33h 40m

$766

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Mon 6/2

12:00 pm-10:27 am

2 stops55h 27m

Denver Intl

Mon 6/23

7:45 am-11:15 am

2 stops18h 30m

$777

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Fri 1/31

9:45 am-5:40 pm

1 stop16h 55m

Denver Intl

Tue 2/11

7:35 pm-8:50 pm

1 stop16h 15m

$791

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/20

Compare providers for flights from Sofia to Denver

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 Sofia to Denver in January.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*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 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.

Travel insights for flights from Sofia to Denver

Get recent, data-driven insights about flights from Sofia to Denver including ideal travel times, pricing trends, and more.

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

Currently, October is the cheapest month in which you can book a flight from Sofia to Denver (average of $197). Flying from Sofia to Denver in March is currently the most expensive (average of $278). 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 SOF to DEN?

Find hourly flight availability from Sofia to Denver. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated January 21, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 16% on flights from Sofia to Denver by exploring options for tickets in the afternoon.

Rainfall in Denver by month

Plan your trip to Denver by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Denver ranges from 0.5 - 2.3 inches per month. May is typically the wettest month, when rainfall can reach 2.3 in. January is typically the driest time to visit Denver when rainfall is around 0.5 in.

Temperature in Denver by month

Plan your trip to Denver by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Denver, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 30.2 F).

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 January 21, 2025.
Get a feel of what it's like to fly with United Airlines, Lufthansa and Air Canada from Sofia to Denver by reading reviews from past customers. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.8
Good
1,341 reviews

Overall

7.8

Crew

8.4

Entertainment

7.2

Comfort

7.7

Boarding

7.8

Food

7.3

Reviews

1 / 10

I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.

KLM
7.8
Good
1,341 reviews
KLM
7.8
Good
1,341 reviews

Overall

7.8

Crew

8.4

Entertainment

7.2

Comfort

7.7

Boarding

7.8

Food

7.3

Reviews

1 / 10

I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.

SWISS
7.5
Good
1,600 reviews
KLM
7.8
Good
1,341 reviews

Overall

7.8

Crew

8.4

Entertainment

7.2

Comfort

7.7

Boarding

7.8

Food

7.3

Reviews

1 / 10

I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.

Air France
7.4
Good
1,490 reviews
KLM
7.8
Good
1,341 reviews

Overall

7.8

Crew

8.4

Entertainment

7.2

Comfort

7.7

Boarding

7.8

Food

7.3

Reviews

1 / 10

I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.

United Airlines
7.4
Good
8,984 reviews
KLM
7.8
Good
1,341 reviews

Overall

7.8

Crew

8.4

Entertainment

7.2

Comfort

7.7

Boarding

7.8

Food

7.3

Reviews

1 / 10

I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.

Turkish Airlines
7.3
Good
3,931 reviews
KLM
7.8
Good
1,341 reviews

Overall

7.8

Crew

8.4

Entertainment

7.2

Comfort

7.7

Boarding

7.8

Food

7.3

Reviews

1 / 10

I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.

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.

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

    British Airways, at $655, was found to be the cheapest airline from Sofia to Denver.Alternate airlines to your destination round-trip include American Airlines and Air France. British Airways is priced at 20% lower than the current average price of a flight leaving 3 months from now.

  • 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.

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

    Currently, October is the cheapest month in which you can book a flight from Sofia to Denver (average of $197). Flying from Sofia to Denver in March is currently the most expensive (average of $278). 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

Traveling to a place near Sofia?

Book flights to Sofia if you plan to visit one of these locations
Keystone
Westminster
Black Hawk
Winter Park
Dillon
Lakewood
Broomfield
Silverthorne
Golden
Brighton
Frisco
Wheat Ridge
Grand Lake
Idaho Springs
Greeley
Central City
Copper Mountain
Longmont
Thornton
Limon

Browse thousands of different options on Cheapflights for your next trip

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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 January 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapest$639Average$734FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$731Average$803FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$731Average$897FlexibilityNo cancel feeOn-time76%
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