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Sofia

$460+ Cheap flights from Colorado 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 6/12. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SOF
may. 5 — may. 121
lun. 5/5
lun. 5/12
1 adult, Economy
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Cheap flight deals from Colorado to Sofia

Keep the following information in mind while searching for Colorado to Sofia flight deals. Data was last updated abril 30, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$639
(FlightHub)

One-way from

$460
(Kiwi.com)

Popular in

June

Cheapest in

April

Average price

$581
Provider with most accurate pricing for Denver Intl-Sofia flight deals.
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Provider most trusted by Cheapflights users for Denver Intl-Sofia flights.
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From Colorado to Sofia
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One-way flight from Colorado to Sofia
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Highest demand for flights based on searches. 30% potential increase in price ($396 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($41 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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Find flight deals from Colorado to Sofia

Cheapest flights from Colorado to Sofia
Explore the most affordable flight options available from Colorado to Sofia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on abril 30, 2025.

This FlightHub deal was found by Cheapflights users on 4/29. 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.
jue. 9/47:50 pmDEN - SOF
1 stop33h 55mTurkish Airlines
mar. 9/99:25 amSOF - DEN
1 stop17h 30mTurkish Airlines
Deal found 4/29$639
This United Airlines deal was found by Cheapflights users on 4/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/44:15 pmDEN - SOF
1 stop21h 45mUnited Airlines
mar. 9/96:20 amSOF - DEN
2 stops36h 54mUnited Airlines
Deal found 4/29$780
This SWISS deal was found by Cheapflights users on 4/29. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 6/155:50 pmDEN - SOF
1 stop33h 40mSWISS
mar. 8/191:15 pmSOF - DEN
1 stop36h 05mSWISS
Deal found 4/29$789
This United deal was found by Cheapflights users on 4/29. 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 6/1511:59 pmDEN - SOF
2 stops27h 01mMultiple Airlines
mar. 8/191:15 pmSOF - DEN
1 stop36h 05mMultiple Airlines
Deal found 4/29$796
This British Airways deal was found by Cheapflights users on 4/29. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 6/156:35 pmDEN - SOF
1 stop15h 35mBritish Airways
mié. 8/209:30 pmSOF - DEN
1 stop27h 55mBritish Airways
Deal found 4/29$809
This FlightHub deal was found by Cheapflights users on 4/29. 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.
sáb. 6/144:15 pmDEN - SOF
1 stop21h 45mLufthansa
mié. 8/206:00 amSOF - DEN
1 stop16h 45mLufthansa
Deal found 4/29$864
This Air Canada deal was found by Cheapflights users on 4/29. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 5/2811:24 amDEN - SOF
2 stops21h 26mAir Canada
mar. 6/106:20 amSOF - DEN
2 stops24h 08mAir Canada
Deal found 4/29$972
This Austrian Airlines deal was found by Cheapflights users on 4/29. 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 Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 6/135:40 pmDEN - SOF
2 stops39h 30mAustrian Airlines
mié. 8/206:55 pmSOF - DEN
2 stops30h 40mAustrian Airlines
Deal found 4/29$1,122

Cheapflights Fare Finder

Customize your flight search to find flights from Colorado 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 abril 30, 2025.
Use the filters below to find and compare flights from Colorado to Sofia that are best for you.

Fly from

Colorado

Fly to

Sofia

Route

Depart

Return

Price

DenverSofia

DEN - SOF

DENSOF

Denver Intl

jue. 9/4

7:50 pm-2:45 pm

1 stop33h 55m

Sofia

mar. 9/9

9:25 am-5:55 pm

1 stop17h 30m

$639

DenverSofia

DEN - SOF

DENSOF

Denver Intl

jue. 9/4

4:15 pm-11:00 pm

1 stop21h 45m

Sofia

mar. 9/9

6:20 am-10:14 am

2 stops36h 54m

$780

DenverSofia

DEN - SOF

DENSOF

Denver Intl

dom. 6/15

5:50 pm-12:30 pm

1 stop33h 40m

Sofia

mar. 8/19

1:15 pm-4:20 pm

1 stop36h 05m

$789

DenverSofia

DEN - SOF

DENSOF

Denver Intl

dom. 6/15

11:59 pm-12:00 pm

2 stops27h 01m

Sofia

mar. 8/19

1:15 pm-4:20 pm

1 stop36h 05m

$796

DenverSofia

DEN - SOF

DENSOF

Denver Intl

dom. 6/15

6:35 pm-7:10 pm

1 stop15h 35m

Sofia

mié. 8/20

9:30 pm-4:25 pm

1 stop27h 55m

$809

DenverSofia

DEN - SOF

DENSOF

Denver Intl

sáb. 6/14

4:15 pm-11:00 pm

1 stop21h 45m

Sofia

mié. 8/20

6:00 am-1:45 pm

1 stop16h 45m

$864

DenverSofia

DEN - SOF

DENSOF

Denver Intl

mié. 5/28

11:24 am-5:50 pm

2 stops21h 26m

Sofia

mar. 6/10

6:20 am-9:28 pm

2 stops24h 08m

$972

DenverSofia

DEN - SOF

DENSOF

Denver Intl

vie. 6/13

5:40 pm-6:10 pm

2 stops39h 30m

Sofia

mié. 8/20

6:55 pm-4:35 pm

2 stops30h 40m

$1,122

DenverSofia

DEN - SOF

DENSOF

Denver Intl

jue. 6/12

7:40 pm-12:55 pm

3 stops56h 15m

$460

DenverSofia

DEN - SOF

DENSOF

Denver Intl

mié. 9/10

6:35 pm-1:30 pm

1 stop33h 55m

$557

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

Showing 1-10 of 12 results
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Best time to book a flight from Colorado to Sofia

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

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

Currently, November is the cheapest month in which you can book a flight from Colorado to Sofia (average of $632). Flying from Colorado to Sofia in June is currently the most expensive (average of $1,218). 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 CO to SOF?

Find hourly flight availability from Colorado to Sofia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated abril 30, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Colorado to Sofia as you normally would.

Rainfall in Sofia by month

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

In terms of precipitation, rainfall in Sofia ranges from 1.2 - 2.8 inches per month. June is typically the wettest month, when rainfall can reach 2.8 in. January is typically the driest time to visit Sofia when rainfall is around 1.2 in.

Temperature in Sofia by month

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

If weather is an important factor for your trip to Sofia, 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 68.0 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 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 abril 30, 2025.
Austrian Airlines
7.6
Good
780 reviews

Entertainment

6.7

Boarding

7.6

Food

6.7

Crew

8.1

Overall

7.6

Comfort

7.3

Reviews

1 / 20
8.0
Excellent

Ely,Mar 2025

VIE - PMI

Luggage at destination was not split into priorities. Had business and only got my bag after 20 minutes, almost towards the end and I was in a rush, so the "priority" was completely ignored.
Austrian Airlines
7.6
Good
780 reviews
Austrian Airlines
7.6
Good
780 reviews

Entertainment

6.7

Boarding

7.6

Food

6.7

Crew

8.1

Overall

7.6

Comfort

7.3

Reviews

1 / 20
8.0
Excellent

Ely,Mar 2025

VIE - PMI

Luggage at destination was not split into priorities. Had business and only got my bag after 20 minutes, almost towards the end and I was in a rush, so the "priority" was completely ignored.
SWISS
7.5
Good
1,588 reviews
Austrian Airlines
7.6
Good
780 reviews

Entertainment

6.7

Boarding

7.6

Food

6.7

Crew

8.1

Overall

7.6

Comfort

7.3

Reviews

1 / 20
8.0
Excellent

Ely,Mar 2025

VIE - PMI

Luggage at destination was not split into priorities. Had business and only got my bag after 20 minutes, almost towards the end and I was in a rush, so the "priority" was completely ignored.
United Airlines
7.4
Good
8,696 reviews
Austrian Airlines
7.6
Good
780 reviews

Entertainment

6.7

Boarding

7.6

Food

6.7

Crew

8.1

Overall

7.6

Comfort

7.3

Reviews

1 / 20
8.0
Excellent

Ely,Mar 2025

VIE - PMI

Luggage at destination was not split into priorities. Had business and only got my bag after 20 minutes, almost towards the end and I was in a rush, so the "priority" was completely ignored.
Turkish Airlines
7.3
Good
3,788 reviews
Austrian Airlines
7.6
Good
780 reviews

Entertainment

6.7

Boarding

7.6

Food

6.7

Crew

8.1

Overall

7.6

Comfort

7.3

Reviews

1 / 20
8.0
Excellent

Ely,Mar 2025

VIE - PMI

Luggage at destination was not split into priorities. Had business and only got my bag after 20 minutes, almost towards the end and I was in a rush, so the "priority" was completely ignored.
American Airlines
7.2
Good
10,000 reviews
Austrian Airlines
7.6
Good
780 reviews

Entertainment

6.7

Boarding

7.6

Food

6.7

Crew

8.1

Overall

7.6

Comfort

7.3

Reviews

1 / 20
8.0
Excellent

Ely,Mar 2025

VIE - PMI

Luggage at destination was not split into priorities. Had business and only got my bag after 20 minutes, almost towards the end and I was in a rush, so the "priority" was completely ignored.

Related info for your journey

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

    If you book a flight to Sofia from Colorado, you will be flying to Sofia, which is the city’s only airport. Sofia (SOF) is located 4.2 mi from the center of Sofia.

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

    The cheapest airlines for a one-way flight from Colorado to Sofia are American Airlines ($557), Lufthansa ($805), and United Airlines ($823).

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

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

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

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

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

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

    Currently, November is the cheapest month in which you can book a flight from Colorado to Sofia (average of $632). Flying from Colorado to Sofia in June is currently the most expensive (average of $1,218). 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

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Alternative routes for Colorado to Sofia

See prices for flight routes from nearby airports that may be better suited for you.
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Top 3 airlines flying from Colorado to Sofia

Discover the top 3 airlines that operate flights from Colorado 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 abril 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapest$531Average$727FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$687Average$967FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$759Average$1,200FlexibilityNo cancel feeOn-time76%

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