Sofia (SOF) → Denver (DEN)
About Sofia to Denver Flights
Discover the best flights from Sofia to Denver, covering 9,455 km in approximately 12h 19m. Sofia (SOF) to Denver (DEN) is one of the major long-haul routes connecting Bulgaria and United States. With 7 major airlines operating this route, travelers have plenty of options to choose from. Whether you're traveling for business or leisure, our comprehensive guide helps you find the best deals, understand seasonal price variations, and choose the right airline for your journey from Sofia to Denver.
12-Month Price History
Flight prices from Sofia to Denver vary significantly throughout the year. February typically offers the best deals with average prices around $1523, while July sees the highest prices, averaging $2531. Savvy travelers can save up to 40% by choosing their travel dates wisely.
Best Time to Fly
Cheapest Month
February
Save up to 40% on average
Most Expensive
July
Peak season pricing
Book in Advance
106 days
For best prices
Booking Tips
For the best prices on Sofia to Denver flights, we recommend booking 63 days in advance. International flights typically see price increases as the departure date approaches, so early booking is advisable. Tuesday and Wednesday departures often offer the lowest fares, while Friday and Sunday flights tend to be more expensive due to business and leisure travel demand. Consider flying early morning or late evening for additional savings, as these off-peak times usually have lower demand.
Airlines Serving This Route
| Airline | Economy | Business | First |
|---|---|---|---|
Frontier Airlines F9 | $990 | - | - |
Southwest Airlines WN | $1410 | - | - |
SkyWest Airlines OO | $1710 | $6440 | $8360 |
United Airlines UA | $1740 | $5530 | $8210 |
American Airlines AA | $1770 | $5900 | $8060 |
Bulgaria Air FB | $1790 | $5830 | $10060 |
Delta Air Lines DL | $1800 | $6340 | $10600 |
Frontier Airlines
F9
Economy
$990
Business
-
First
-
Southwest Airlines
WN
Economy
$1410
Business
-
First
-
SkyWest Airlines
OO
Economy
$1710
Business
$6440
First
$8360
United Airlines
UA
Economy
$1740
Business
$5530
First
$8210
American Airlines
AA
Economy
$1770
Business
$5900
First
$8060
Bulgaria Air
FB
Economy
$1790
Business
$5830
First
$10060
Delta Air Lines
DL
Economy
$1800
Business
$6340
First
$10600
Prices shown are estimates based on historical data. Actual prices may vary based on dates, availability, and current promotions.
Alternative Flight Options
Skopje → Denver
Skopje International (SKP) to Denver International (DEN)
Distance: 9,429 km
Average price: $1969
Pristina → Denver
Pristina International (PRN) to Denver International (DEN)
Distance: 9,346 km
Average price: $1952
Skopje → Denver
Skopje (SKP) to Denver International (DEN)
Distance: 9,430 km
Average price: $1969
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Frequently Asked Questions
How long is the flight from Sofia to Denver?
The flight time from Sofia (SOF) to Denver (DEN) is approximately 12 hours and 19 minutes. This duration is for direct flights and may vary depending on aircraft type, weather conditions, and air traffic.
What is the distance between Sofia and Denver?
The aerial distance between Sofia and Denver is 9,455 kilometers (5,875 miles). This is the straight-line distance, which is used to calculate flight times.
Which airlines fly from Sofia to Denver?
Several airlines operate flights between Sofia and Denver, including United Airlines, Southwest Airlines, Frontier Airlines and 4 more airlines. Most flights on this route include one or more stops.
What is the cheapest month to fly from Sofia to Denver?
Based on historical data, February typically offers the lowest airfares for flights from Sofia to Denver. However, prices can vary based on holidays, events, and airline promotions. We recommend checking our price calendar for the most up-to-date information.
How far in advance should I book my flight to Denver?
For the best prices on Sofia to Denver flights, we recommend booking 180 days in advance. International flights generally require earlier booking than domestic routes.
Do I need a visa to travel from Sofia to Denver?
Visa requirements depend on your nationality and the purpose of your visit. Citizens of Bulgaria traveling to United States should check the latest visa requirements. Visit our partner site visarequirements.io for detailed visa information.
What is the time difference between Sofia and Denver?
Sofia operates on Europe/Sofia time zone, while Denver is in the America/Denver time zone. For current time differences and to plan your schedule, visit our partner site timezig.com for accurate timezone conversions.