$349 Find Cheap Flights from Sofia to Colorado

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Sofia to Colorado departing on 5/25. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Colorado

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Sofia to Colorado, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Sofia to Colorado, as well as popular online travel agencies
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Flight Deals

Book Cheap Sofia to Colorado Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Sofia to Colorado that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Sofia to Colorado

Sun, May 3 - Sun, May 10
Turkish Airlines Logo
9:35 am - 6:25 pm
SOF
-
DEN
17h 50m
1 stop
Turkish Airlines Logo
8:25 pm - 3:00 pm
DEN
-
SOF
33h 35m
1 stop
$831Turkish Airlines
Sun, May 3 - Sun, May 10
Turkish Airlines Logo
9:35 am - 6:25 pm
SOF
-
DEN
17h 50m
1 stop
Turkish Airlines Logo
8:25 pm - 3:00 pm
DEN
-
SOF
33h 35m
1 stop
$837Turkish Airlines
Sun, May 3 - Sun, May 10
Turkish Airlines Logo
2:05 pm - 10:19 pm
SOF
-
DEN
41h 14m
2 stops
Turkish Airlines Logo
8:25 pm - 3:00 pm
DEN
-
SOF
33h 35m
1 stop
$886Turkish Airlines
Thu, Apr 30 - Thu, May 7
Lufthansa Logo
6:30 am - 1:35 pm
SOF
-
DEN
16h 05m
1 stop
Lufthansa Logo
4:05 pm - 6:40 pm
DEN
-
SOF
17h 35m
1 stop
$902Lufthansa
Sun, May 3 - Sun, May 10
United Airlines Logo
6:20 am - 1:35 pm
SOF
-
DEN
16h 15m
1 stop
United Airlines Logo
8:25 pm - 6:40 pm
DEN
-
SOF
13h 15m
1 stop
$908United Airlines
Sun, May 3 - Sun, May 10
United Airlines Logo
6:20 am - 1:35 pm
SOF
-
DEN
16h 15m
1 stop
United Airlines Logo
9:37 am - 11:00 am
DEN
-
SOF
16h 23m
2 stops
$913United Airlines
Sun, May 3 - Sun, May 10
Air Canada Logo
6:20 am - 7:00 pm
SOF
-
DEN
21h 40m
2 stops
Air Canada Logo
11:30 am - 12:10 pm
DEN
-
SOF
15h 40m
2 stops
$919Air Canada
Thu, Apr 30 - Thu, May 7
Lufthansa Logo
6:30 am - 1:35 pm
SOF
-
DEN
16h 05m
1 stop
Lufthansa Logo
5:45 pm - 6:25 pm
DEN
-
SOF
15h 40m
2 stops
$936Lufthansa
Fri, Apr 3 - Tue, Apr 7
Multiple Airlines Logo
2:15 pm - 12:08 pm
SOF
-
ASE
30h 53m
3 stops
Multiple Airlines Logo
1:07 pm - 8:30 pm
ASE
-
SOF
22h 23m
2 stops
$1,589Multiple Airlines
Fri, Apr 3 - Tue, Apr 7
Multiple Airlines Logo
2:15 pm - 12:08 pm
SOF
-
ASE
30h 53m
3 stops
Multiple Airlines Logo
1:07 pm - 8:30 pm
ASE
-
SOF
22h 23m
3 stops
$4,496Multiple Airlines
Booking Insights

KAYAK's insights & trends for Sofia to Colorado flights

Get data-powered insights and trends into flights from Sofia to Colorado to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from Sofia to Colorado?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from Sofia to Colorado were found on Turkish Airlines ($831) and United Airlines ($908).

Good to know

Low seasonSeptember
Cheapest flight$349
Best time to beat the crowds with an average 15% drop in price.
Most popular time to fly and prices are also 15% lower on average.
Flight from Sofia to Denver

FAQs - booking Colorado flights

  • How does KAYAK find such low prices on flights from Sofia to Colorado?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Sofia to Colorado.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Sofia to Colorado?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Sofia to Colorado is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Sofia to Colorado?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Sofia to Colorado with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Sofia to Colorado?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Sofia to Colorado up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 3 airlines serving from Sofia to Colorado

 
See real verified KAYAK customer reviews for airlines flying from Sofia to Colorado. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Sofia to Colorado? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 9452 reviews
7.7Boarding
7.3Comfort
6.6Food
8.1Crew
7.1Entertainment
Airline reviews

Short flight, crew and staff very efficient. Over all good flight experience.

8.0 ExcellentAnonymous, Mar 2026
SOF - FRA
Read more United Airlines reviews

Short flight, crew and staff very efficient. Over all good flight experience.

Seats are uncomfortable. This has been a trend in the industry for decades. Trying to fit more seats on each plane to increase profits at the expense of the passenger.

It’s always a great time flying with united airlines.

We got delayed three hours and nobody thought to have the bathroom fixed while we were sitting waiting to board? took a full hour to have maintenance come and check it off. Had to shut the bathroom down twice so that the pilots could go to the bathroom. Everyone missed their connections.

Women boarding passengers at the gate was absolutely rude and disrespectful of passengers. The flight attendant was absolutely delightful! Smiling and connected with the passengers. So happy. The seats are cramped and uncomfortable but I guess that’s just the way it is Communication regarding flight was excellent

As great a red-eye flight as red-eye flights can be.

Both of my flights arrived early and check in process was smooth

Everything was on time Will use united again for sure

I just think it’s unfortunate that Airlines have completely abandoned the idea of serving any kind of decent or even real food on flights, not even on a four hour flight!? Those days are gone, I guess.

The flight was delayed by two de-icings. The seatbelt did not work correctly. It did not stay tight.

Cabin was kept very hot and it was uncomfortable. Entertainment system did not work at my seat. Crew and service is fantastic

Extremely bad BAD BAD BAD. NEVER TURKISH AIRLINES EVER AGAIN..PIRATES COMPANY.

Typically great service from Turkish with comfortable seat and amenitie, good food and great attention from staff.

Delicious food, comfortable and clean plane. It's a little cramped in the hall in front of the gate.

Very hot cabin made long flight uncomfortable, even in business class! Food was great. Istanbul business lounge had great food but too few bathrooms and seating . They also need more electric outlets for charging devices. Appreciate the ability to go through fast track lines w business class

The crew on this flight provided exceptional business class service to me.

The staff at the boarding or the rudest uninformative and no English whatsoever they’re very rude as if they are envious of you travelling I don’t understand how could someone would be this rude and this out of touch and cold

You charged me for luggage although the airline does not- you charged me for seat when customers can pick their own seat at checkout in I travel to Europe slot and I will not use kayak again

The seats were extremely small. Boarding was not communicated correctly. It wasn’t a pleasant trip.

They oversold the tickets by one which was my ticket so I didn’t have a ticket till last second

How about changing the personal out to more friendly human beings? This team was pretty arrogant. No fun!!

Everything could have been better. What needed to be wrong with United went wrong

Excellent service. The crew goes above their way to make the customer comfortable.

It was good. The seats in economy weren’t bad

I hated the FRA Airport. Confusing signage, including the path to Immigration and Security It seems that the airport grew haphazardly over the years. I have been through multiple WW Hubs with much better experiences.

Excellent service; they helped me reschedule so I can fly in an earlier flight

Wonderful staff. The boarding process can be improved a little better by adequate prior communication but all in all they did fine. However the boarding gate was quite unfreindly to elderly and who needs help with sevral stairs.

Flight map did not work. Crew was great, food was good, plane took off on time and landed early. That's all I can ask.

I had a good comfortable seat. There was nearly an hour delay. There was an accident with the champagne, but I was well compensated. These things happen sometimes.

Very good. Comfortable and I felt well taken care of from start to finish

Everything you need to know for your flight from Sofia to Colorado

Information on your arrival and departure airports