$852 Find Cheap Flights from Sofia to Colorado

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Sofia to Colorado departing on 1/28. 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

Wed, Jan 28 - Wed, Feb 4
Multiple Airlines Logo
2:35 pm - 10:42 am
SOF
-
DEN
29h 07m2 stops
Multiple Airlines Logo
11:35 am - 5:50 pm
DEN
-
SOF
21h 15m2 stops
$852Multiple Airlines
Fri, Jan 16 - Thu, Jan 22
Lufthansa Logo
6:10 am - 1:40 pm
SOF
-
DEN
16h 30m1 stop
Lufthansa Logo
4:20 pm - 10:45 pm
DEN
-
SOF
21h 25m1 stop
$865Lufthansa
Fri, Jan 16 - Thu, Jan 22
Lufthansa Logo
6:10 am - 1:40 pm
SOF
-
DEN
16h 30m1 stop
Lufthansa Logo
11:15 am - 1:15 pm
DEN
-
SOF
17h 00m2 stops
$867Lufthansa
Thu, Dec 25 - Thu, Jan 1
United Airlines Logo
2:35 pm - 8:22 am
SOF
-
DEN
26h 47m2 stops
United Airlines Logo
7:45 am - 10:45 pm
DEN
-
SOF
30h 00m2 stops
$871United Airlines
Thu, Dec 25 - Thu, Jan 1
United Airlines Logo
2:35 pm - 4:37 pm
SOF
-
DEN
35h 02m2 stops
United Airlines Logo
3:55 pm - 10:45 pm
DEN
-
SOF
21h 50m1 stop
$872United Airlines
Wed, Jan 28 - Wed, Feb 4
Lufthansa Logo
6:05 am - 2:35 pm
SOF
-
DEN
17h 30m1 stop
Lufthansa Logo
4:20 pm - 6:20 pm
DEN
-
SOF
17h 00m1 stop
$878Lufthansa
Fri, Jan 16 - Thu, Jan 22
United Airlines Logo
6:10 am - 8:13 pm
SOF
-
DEN
23h 03m2 stops
United Airlines Logo
9:35 am - 1:50 pm
DEN
-
SOF
19h 15m2 stops
$881United Airlines
Mon, Dec 29 - Mon, Jan 5
United Airlines Logo
6:05 am - 12:15 am
SOF
-
DEN
27h 10m2 stops
United Airlines Logo
4:05 pm - 10:45 pm
DEN
-
SOF
21h 40m2 stops
$915United Airlines
Thu, Dec 25 - Mon, Jan 5
United Airlines Logo
2:35 pm - 1:40 pm
SOF
-
DEN
32h 05m1 stop
United Airlines Logo
1:30 pm - 10:45 pm
DEN
-
SOF
24h 15m2 stops
$916United Airlines
Wed, Jan 28 - Wed, Feb 4
Multiple Airlines Logo
6:05 am - 7:55 pm
SOF
-
DEN
22h 50m3 stops
Multiple Airlines Logo
3:40 pm - 9:40 pm
DEN
-
SOF
21h 00m2 stops
$955Multiple 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.

What is the cheapest month to fly from Sofia to Colorado?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Sofia to Colorado, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Sofia to Colorado is February, when tickets cost $745 (return) on average. On the other hand, the most expensive months are May and August, when the average cost of round-trip tickets is $1,093 and $1,091 respectively.

What’s the cheapest day of the week to fly from Sofia to Colorado?

The average price of all round-trip flights from Sofia to Colorado clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to Colorado on a Friday and more expensive on a Thursday. On your return trip to Sofia, you should consider flying back on a Thursday, and avoid Saturdays for better deals.

Good to know

Low seasonApril
Cheapest flight$852
Best time to beat the crowds with an average 1% drop in price.
Most popular time to fly and prices are also 10% 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.

  • What is the cheapest time of day to fly to Colorado?

    The cheapest time of day to fly to Colorado is generally at night, when round-trip flights cost $691 on average. The most expensive time of day to fly to Colorado is generally in the morning, which is peak travel time and where the average cost of a ticket is $816.

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 9094 reviews
6.6Food
8.1Crew
7.1Entertainment
7.7Boarding
7.3Comfort
Airline reviews

United have really come back. Airport and boarding process is clear and good, app and information also very good

10.0 ExcellentSteve, Dec 2025
EUG - DEN
Read more United Airlines reviews

United have really come back. Airport and boarding process is clear and good, app and information also very good

We Left Calgary 1/2 hour late and that made for a tight connection in Denver. After arriving everything was done to help us make our connection. That was a great effort. Thank You United

The entertainment available didn’t work for anyone on the flight. Long 6 hr flight with no entertainment option and the staff didn’t know until an hour into the flight when we made sure they knew about it. They had no way to fix it.

Late FA meant slow boarding. WiFi did not work. I’m a medium plus sized passenger. The seatbelt was for the first time ever barely fitting. And we delayed on the tarmac 40 min

My husband and I had boarded the flight from Denver to Chicago, and one of the last passengers to get on the plane opened the overhead bin above my husband's seat and threw his bag out of the bin to make space for his own. He said, "Mine is bigger!" The flight attendant supported the new passenger. They didn't care that my husband has two artificial knees and must have the foot room in front of his seat to be able to fit his legs in -- and to be able to stand, much less walk, at the end of the flight. I have never seen this happen before, and it was a disaster.

Terrible. They wouldn't allow me on my flight on the 14th..

I understand stuff happens, but plane failures are likely due to lack of maintenance. Additionally, air conditioning wasn't working, no snack/drink service, no WiFi. Fortunately, the crew was communicative and light-hearted. United grabbed another plane and we were able to get to our destination.

Had to cancel first flight because Airporter Bus took over 3 hrs to get to airport which resulted in an extra $378 dollar fare . Is there anyway I can be reimbursed for initial fare since it was not my fault? Sent from my iPhone EJ Ledet

Inoperable monitor left no entertainment for 9 hours. The crew was not helpful. Food was awful.

Excellent flight. Boarding was efficient and departure was on time. Smooth flight with on time arrival. Deplaning was also efficient.

Seats too much and for the price we paid eve thought economy we still had to pay $169 to check a ba that’s ridiculous and also my daughter needed water so she can take her medicine we push the boton for the attendant to get us water they never came we push it 3 times no one came and ask what we needed . Am not happy with the service at all I will not fly with TK anymore

Boarding experience was a mess- both to and from Istanbul airport. No one knew anything. They asked everyone to line up according to their sit numbers- it was unbelievable. Business class had a separate line, but it was hard to find- I had to go through all that mess before finding it. Would not recommend

Excellent food and service on my international flight. Most notable is the food provided by Turkish even for coach passengers is very good.

They can my date of travel and let me standard in Istanbul for three days stop over and only pay for one day in a hotel with only one breakfast for three days.

the flight was cancelled and I was rebooked twice, once 26 hours later, then another 24 hours later. In total the flight was delayed for 40 hours. Never again will I use kayak or Turkish Airlines for my travel.

Worst experience with boarding once we left the wheel chair even traveling business we had to wait with all the crowd for the bus to take us to the plane then climb the stairs with our bags When you pay extra for comfort and convenience and you don’t get any is disappointing

Food is very turkish. No regard for other natinalities taste and preference. The entertainment can be improved- it was the same menu on 10/8/25 and 10/25/25. The boarding is the worst in the airline industry- I suggest you ask your staff to and watch how other airlines do it.

The best airline for international travel in terms of value you get in business class (service/cost)

I liked the overall flight experience. However, Turkish officials could do a better job at guiding non-Turkish speakers to their connecting flight gates in such a huge & vast airport.

Very small and cramped aisles and seats. Food was poor but the fresh hot roll and hummus was good. No cans of soda given but they had small bottles of water. Crew was nice and pleasant and kept bathroom clean.

Booked seats (paid extra) online and found they didn’t exist on the flight. We were then separated from the rest of our party. Given seats in the very back of the plane. We will not fly Discover or Lufthansa again. We will not book flights or travel through Kayak again!

Had a few open seats and could use it for a great rest ful journey

It was very good. Service was friendly and efficient, and food was good.

Airline food is airline food, but the plane was wonderful and the seating comfort outstanding. One of my best flights in quite a while.

Crew was outstanding, helpful and friendly. Food is deteriorating. The snack at the end of the flight was not good, a greasy moosh of toast cheese snd other unidentifiable ingredients. Coming from Germany a pretzl with butter would have been better. Entertainment had a great selection.

Smooth flight with enough time for connection. Ran out of meal options. In-flight and gate staff were friendly and helpful. Good service overall.

The seat space seemed small especially when the person ahead reclined but other than that, very good.

Luggage transfer in Chicago was not performed in time. I received my luggage at my destination two days later.

Give yourself over 2+ hours layover because if flight is slighlty delayed and you miss your connection, Lufthansa will do nothing for you

We would have missed our connection from Munich to Boston but we had a van outside the plan that wisked us to our terminal. Much appreciated and we didn’t even realize that Lufthansa had done this until the announcement on disembarkation. Well organized airline! Will definitely fly Lufthansa again!!!

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

Information on your arrival and departure airports