$827 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 11/20. 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

Thu, Nov 20 - Thu, Nov 27
Lufthansa Logo
6:00 am - 1:40 pmSOF-DEN
16h 40m1 stop
Lufthansa Logo
1:25 pm - 1:15 pmDEN-SOF
14h 50m2 stops
$827Lufthansa
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Thu, Nov 20 - Thu, Nov 27
Multiple Airlines Logo
6:00 am - 1:40 pmSOF-DEN
16h 40m1 stop
Multiple Airlines Logo
3:55 pm - 6:00 pmDEN-SOF
17h 05m1 stop
$833Multiple Airlines
Find Deal
Wed, Dec 17 - Wed, Apr 1
United Airlines Logo
6:10 am - 12:15 amSOF-DEN
27h 05m2 stops
United Airlines Logo
3:55 pm - 6:40 pmDEN-SOF
17h 45m2 stops
$835United Airlines
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Wed, Dec 17 - Sat, Apr 4
United Airlines Logo
2:25 pm - 12:15 amSOF-DEN
18h 50m2 stops
United Airlines Logo
3:55 pm - 10:50 pmDEN-SOF
21h 55m2 stops
$837United Airlines
Find Deal
Thu, Dec 18 - Thu, Apr 2
Turkish Airlines Logo
9:40 pm - 5:35 pmSOF-DEN
28h 55m1 stop
Turkish Airlines Logo
8:25 pm - 3:00 pmDEN-SOF
33h 35m1 stop
$858Turkish Airlines
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Thu, Dec 18 - Sat, Apr 4
Turkish Airlines Logo
4:00 pm - 5:35 pmSOF-DEN
34h 35m1 stop
Turkish Airlines Logo
8:25 pm - 8:45 amDEN-SOF
27h 20m1 stop
$880Turkish Airlines
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Tue, Dec 23 - Mon, Mar 30
Air Canada Logo
6:00 am - 8:55 amSOF-DEN
35h 55m2 stops
Air Canada Logo
11:05 am - 6:40 pmDEN-SOF
22h 35m2 stops
$897Air Canada
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Tue, Dec 23 - Thu, Apr 2
Air Canada Logo
6:00 am - 8:55 amSOF-DEN
35h 55m2 stops
Air Canada Logo
1:25 pm - 6:40 pmDEN-SOF
20h 15m2 stops
$903Air Canada
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Thu, Apr 23 - Mon, Apr 27
KLM Logo
7:00 am - 5:31 pmSOF-DEN
19h 31m2 stops
KLM Logo
6:30 am - 2:00 pmDEN-SOF
22h 30m2 stops
$947KLM
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Thu, Apr 23 - Mon, Apr 27
KLM Logo
7:00 am - 10:49 pmSOF-DEN
24h 49m2 stops
KLM Logo
12:20 pm - 2:00 pmDEN-SOF
16h 40m2 stops
$949KLM
Find Deal
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$827
Best time to beat the crowds with an average 8% drop in price.
Most popular time to fly and prices are also 9% 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 8997 reviews
7.3Comfort
7.1Entertainment
7.7Boarding
8.1Crew
6.6Food
Airline reviews

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

8.0 ExcellentBen, Oct 2025YYC - DEN
Read more United Airlines reviews

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.

Our flight was understandably diverted to a small regional airport in Laramie, Wyoming due to weather conditions, which I fully recognize and appreciate. However, the low rating stems from the experience that followed: passengers remained on board for over an hour without the option to deplane and stretch, despite the aircraft being stationary. Although the pilot opened the cabin door, only he was permitted to exit. Meanwhile, passengers grew increasingly uncomfortable as warm summer air entered the cabin through the open door, and being in the second row meant we were impacted immediately. While the flight attendants made efforts to keep everyone at ease, I believe allowing passengers to deplane briefly, given the extended delay, would have significantly improved the overall experience.

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.

We couldn’t fly to Chicago on our booked flight. The flight was overbooked.

Small seat space for 13 hours flight, they charged for baggage , very bad quality of food,

I was sitting almost in the back, the seats are very tight and there’s no legroom, it’s uncomfortable for a long distance

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 went well. I will fly with Lufthansa again. And use Kayak whenever I book flights

Bought a seat in a flight that got changed out so ended up paying for a seat I would have had if I hadn't paid.

Food was poor quality and the screens for entertainment didn’t work properly

Food was much better than my outbound flight. On-time. Good service. I had a problem with my entertainment screen, but the attendant fixed it promptly.

I think they overbooked Frankfurt to New York and bumped me off. This changed my return travel I arrived home about 4 hours late. Almost 24 total travel time Totally unacceptable Would not travel with United

United lost my travel information and canceled my original flight. I had a seat assignment but was refused the booking. I had to prove that I went to Germany on United Very concerned about security that no one recorded my passport from Cleveland to NY and NY to Frankfurt I arrived at home at 12:30am on Saturday instead of 8pm I expect a full refund from United Please provide information to assure compensation

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

Information on your arrival and departure airports

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