$559+ Cheap flights from Bulgaria to Colorado
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 8/24. Fares are subject to change and may not be available on all flights or dates of travel.
SOF — DEN
Sep 3 — Sep 101
Round-trip
1 adult, Economy
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Cheapest flights from Bulgaria to ColoradoExplore the most affordable flight options available from Bulgaria to Colorado. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 4, 2026.
Explore the most affordable flight options available from Bulgaria to Colorado. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 4, 2026.
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.
Thu 9/36:30 am
SOF
- DEN
1 stop18h 10m
Lufthansa
Thu 9/105:40 pm
DEN
- SOF
1 stop20h 00m
Lufthansa
Deal found 7/31![Lufthansa logo]()
$951
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/36:30 am
SOF
- DEN
1 stop18h 10m
United Airlines
Thu 9/105:30 am
DEN
- SOF
2 stops32h 45m
United Airlines
Deal found 7/31![United Airlines logo]()
$970
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/712:55 pm
SOF
- ASE
2 stops37h 31m
United Airlines
Sun 9/611:25 am
ASE
- SOF
2 stops26h 50m
United Airlines
Deal found 8/3![United Airlines logo]()
$1,051
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/712:55 pm
SOF
- ASE
2 stops38h 34m
United Airlines
Tue 9/112:10 pm
ASE
- SOF
2 stops20h 50m
United Airlines
Deal found 8/3![United Airlines logo]()
$1,052
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/712:55 pm
SOF
- ASE
2 stops37h 31m
United Airlines
Thu 9/311:53 am
ASE
- SOF
2 stops26h 22m
United Airlines
Deal found 8/3![United Airlines logo]()
$1,086
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/712:55 pm
SOF
- ASE
2 stops38h 34m
United Airlines
Fri 9/43:20 pm
ASE
- SOF
2 stops46h 30m
United Airlines
Deal found 8/3![United Airlines logo]()
$1,087
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/86:10 am
SOF
- ASE
2 stops39h 16m
United Airlines
Sun 12/2710:30 am
ASE
- SOF
2 stops17h 45m
United Airlines
Deal found 8/3![United Airlines logo]()
$1,126
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/86:10 am
SOF
- ASE
2 stops39h 16m
United Airlines
Fri 12/2512:20 pm
ASE
- SOF
2 stops25h 40m
United Airlines
Deal found 8/3![United Airlines logo]()
$1,127
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/86:10 am
SOF
- ASE
2 stops39h 16m
United Airlines
Wed 12/236:30 pm
ASE
- SOF
2 stops33h 45m
United Airlines
Deal found 8/3![United Airlines logo]()
$1,151
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/86:10 am
SOF
- ASE
2 stops44h 16m
United Airlines
Thu 9/311:53 am
ASE
- SOF
2 stops26h 22m
United Airlines
Deal found 8/3![United Airlines logo]()
$1,161
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/86:10 am
SOF
- ASE
2 stops42h 58m
United Airlines
Fri 9/44:45 pm
ASE
- SOF
2 stops45h 05m
United Airlines
Deal found 8/3![United Airlines logo]()
$1,162
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/86:10 am
SOF
- ASE
2 stops39h 16m
United Airlines
Mon 12/2111:00 am
ASE
- SOF
2 stops26h 55m
United Airlines
Deal found 8/3![United Airlines logo]()
$1,201
Best flights from Bulgaria to ColoradoDiscover carefully curated flight deals from Bulgaria to Colorado that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 4, 2026.
Discover carefully curated flight deals from Bulgaria to Colorado that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 4, 2026.
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.
Thu 9/36:30 am
SOF
- DEN
1 stop18h 10m
Lufthansa
Thu 9/105:40 pm
DEN
- SOF
1 stop20h 00m
Lufthansa
Deal found 7/31![Lufthansa logo]()
$951
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/36:30 am
SOF
- DEN
1 stop18h 10m
United Airlines
Thu 9/105:30 am
DEN
- SOF
2 stops32h 45m
United Airlines
Deal found 7/31![United Airlines logo]()
$970
Last-minute flights from Bulgaria to ColoradoDiscover last-minute flight deals from Bulgaria to Colorado. Data last updated August 4, 2026 and is based on user searches.
Discover last-minute flight deals from Bulgaria to Colorado. Data last updated August 4, 2026 and is based on user searches.
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/712:55 pm
SOF
- ASE
2 stops37h 31m
United Airlines
Sun 9/611:25 am
ASE
- SOF
2 stops26h 50m
United Airlines
Deal found 8/3![United Airlines logo]()
$1,051
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/712:55 pm
SOF
- ASE
2 stops38h 34m
United Airlines
Tue 9/112:10 pm
ASE
- SOF
2 stops20h 50m
United Airlines
Deal found 8/3![United Airlines logo]()
$1,052
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/712:55 pm
SOF
- ASE
2 stops37h 31m
United Airlines
Thu 9/311:53 am
ASE
- SOF
2 stops26h 22m
United Airlines
Deal found 8/3![United Airlines logo]()
$1,086
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/712:55 pm
SOF
- ASE
2 stops38h 34m
United Airlines
Fri 9/43:20 pm
ASE
- SOF
2 stops46h 30m
United Airlines
Deal found 8/3![United Airlines logo]()
$1,087
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/86:10 am
SOF
- ASE
2 stops39h 16m
United Airlines
Sun 12/2710:30 am
ASE
- SOF
2 stops17h 45m
United Airlines
Deal found 8/3![United Airlines logo]()
$1,126
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/86:10 am
SOF
- ASE
2 stops39h 16m
United Airlines
Thu 12/243:30 pm
ASE
- SOF
2 stops46h 30m
United Airlines
Deal found 8/3![United Airlines logo]()
$1,127
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/86:10 am
SOF
- ASE
2 stops39h 16m
United Airlines
Wed 12/236:30 pm
ASE
- SOF
2 stops33h 45m
United Airlines
Deal found 8/3![United Airlines logo]()
$1,151
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/86:10 am
SOF
- ASE
2 stops44h 16m
United Airlines
Thu 9/311:53 am
ASE
- SOF
2 stops26h 22m
United Airlines
Deal found 8/3![United Airlines logo]()
$1,161
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/86:10 am
SOF
- ASE
2 stops42h 58m
United Airlines
Fri 9/44:45 pm
ASE
- SOF
2 stops45h 05m
United Airlines
Deal found 8/3![United Airlines logo]()
$1,162
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/86:10 am
SOF
- ASE
2 stops39h 16m
United Airlines
Mon 12/2111:00 am
ASE
- SOF
2 stops26h 55m
United Airlines
Deal found 8/3![United Airlines logo]()
$1,201
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.
Thu 9/36:30 am
SOF
- DEN
1 stop18h 10m
Lufthansa
Thu 9/105:40 pm
DEN
- SOF
1 stop20h 00m
Lufthansa
Deal found 7/31![Lufthansa logo]()
$951
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/36:30 am
SOF
- DEN
1 stop18h 10m
United Airlines
Thu 9/105:30 am
DEN
- SOF
2 stops32h 45m
United Airlines
Deal found 7/31![United Airlines logo]()
$970
One-way flights from Bulgaria to ColoradoSearch for one-way flight options from Bulgaria to Colorado. Find affordable one-way fares based on user searches. Data last updated August 4, 2026.
Search for one-way flight options from Bulgaria to Colorado. Find affordable one-way fares based on user searches. Data last updated August 4, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/30. 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 8/247:30 pm
SOF
- DEN
3 stops47h 33m
Multiple Airlines
Deal found 7/30![Multiple Airlines logo]()
$559
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/175:45 am
SOF
- DEN
3 stops38h 35m
Multiple Airlines
Deal found 8/3![Multiple Airlines logo]()
$712
This Turkish Airlines deal was found by Cheapflights users on 7/30. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/249:10 pm
SOF
- DEN
1 stop30h 15m
Turkish Airlines
Deal found 7/30![Turkish Airlines logo]()
$887
This Booking.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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/176:10 am
SOF
- DEN
1 stop16h 35m
Lufthansa
Deal found 8/3![Lufthansa logo]()
$938
Find flight deals from Bulgaria to Colorado
Keep the following information in mind while searching for Bulgaria to Colorado flight deals. Data was last updated August 4, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $951 (Gotogate) |
One-way from | $559 (Kiwi.com) |
Popular in | July |
Cheapest in | September |
Average price | $1,065 |
Cheapflights Fare Finder
Customize your flight search to find flights from Bulgaria to Colorado 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 Bulgaria to Colorado that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
SofiaDenver
SOF - DEN
SOFDEN
Sofia
Thu 9/3
6:30 am-3:40 pm
1 stop18h 10m
Denver Intl
Thu 9/10
5:40 pm-10:40 pm
1 stop20h 00m
$951
SofiaDenver
SOF - DEN
SOFDEN
Sofia
Thu 9/3
6:30 am-3:40 pm
1 stop18h 10m
Denver Intl
Thu 9/10
5:30 am-11:15 pm
2 stops32h 45m
$970
Cheapest one-way
SofiaDenver
SOF - DEN
SOFDEN
Sofia
Mon 8/24
7:30 pm-10:03 am
3 stops47h 33m
$559
SofiaDenver
SOF - DEN
SOFDEN
Sofia
Mon 8/17
5:45 am-11:20 am
3 stops38h 35m
$712
Quickest one-way
SofiaDenver
SOF - DEN
SOFDEN
Sofia
Mon 8/24
9:10 pm-6:25 pm
1 stop30h 15m
$887
Sorted by cheapest first
Best time to book a flight from Bulgaria to Colorado
Have a flexible travel schedule? Discover the best time to fly to Colorado from Bulgaria with our price prediction graph.
SOF-DEN
SOF-ASE
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 Bulgaria to Colorado
BG0-USCO
SOF-DEN
SOF-ASE
No data available for this route at this time. Please check back soon.
Reviews of airlines servicing Colorado
Get insights into the airlines that provide service to Colorado. 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 Colorado. Reviews last updated August 4, 2026.
Read reviews from past customers who have flown Turkish Airlines,United Airlines, andLufthansa from Bulgaria to Colorado. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Overall
7.4
Crew
7.8
Comfort
7.3
Entertainment
7.5
Boarding
7.3
Food
7.5
Reviews
1 / 20
8.0
ExcellentMuhammad,Jan 2026
ORD - DFW
Overall
7.4
Crew
7.8
Comfort
7.3
Entertainment
7.5
Boarding
7.3
Food
7.5
Reviews
1 / 20
8.0
ExcellentMuhammad,Jan 2026
ORD - DFW
Overall
7.4
Crew
7.8
Comfort
7.3
Entertainment
7.5
Boarding
7.3
Food
7.5
Reviews
1 / 20
8.0
ExcellentMuhammad,Jan 2026
ORD - DFW
Overall
7.4
Crew
7.8
Comfort
7.3
Entertainment
7.5
Boarding
7.3
Food
7.5
Reviews
1 / 20
8.0
ExcellentMuhammad,Jan 2026
ORD - DFW
Related info for your journey
Find useful and relevant information for your journey from Bulgaria to Colorado. 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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Alternative routes for Bulgaria to Colorado
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Colorado by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Bulgaria to Colorado by cabin class
Find flights from Bulgaria to Colorado, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Bulgaria and Colorado flights
Browse other Bulgaria and Colorado flight options. Last updated on August 4, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Find a return flight route from Colorado
Find the right flight back to Bulgaria after your stay in Colorado
Bulgaria to Colorado flights
Consider these flights traveling from Bulgaria to Colorado.
Top 3 airlines flying from Bulgaria to Colorado
Discover the top 3 airlines that operate flights from Bulgaria to Colorado. 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.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$704 | Average$865 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$773 | Average$903 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$810 | Average$1,013 | FlexibilityNo cancel fee | On-time76% |