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DEN - SOF

Find cheap flights from Denver to Sofia from $446

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Denver to Sofia departing on 5/10. 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
0 bags
Wed 5/29
Wed 6/5

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These are the airlines KAYAK users have selected most often from within our search results in flight searches from Denver to Sofia, 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 Denver to Sofia, as well as popular online travel agencies
In the last 7 days travelers have searched 43,983,279 times on KAYAK, and here is why:

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Cheap flight deals from Denver to Sofia (DEN-SOF)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Denver to Sofia 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 and deals for you by selecting your travel dates.
Choose your dates
7:35 pm - 8:20 pmDEN-SOF
15h 45m1 stop
9:20 am - 5:40 pmSOF-DEN
17h 20m1 stop
$759Turkish Airlines
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Fri, Aug 9 - Fri, Sep 13
7:35 pm - 8:20 pmDEN-SOF
15h 45m1 stop
9:20 am - 5:40 pmSOF-DEN
17h 20m1 stop
$781Turkish Airlines
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Thu, Aug 8 - Thu, Sep 12
6:35 pm - 8:25 pmDEN-SOF
16h 50m1 stop
9:20 pm - 4:30 pmSOF-DEN
28h 10m1 stop
$819British Airways
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Mon, Jul 29 - Thu, Aug 29
6:35 pm - 8:25 pmDEN-SOF
16h 50m1 stop
8:00 pm - 7:59 pmSOF-DEN
32h 59m2 stops
$829British Airways
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Mon, Jul 29 - Mon, Sep 2
10:10 am - 12:10 pmDEN-SOF
17h 00m2 stops
6:00 am - 6:40 pmSOF-DEN
21h 40m1 stop
$846United Airlines
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Tue, Aug 13 - Tue, Sep 17
11:15 am - 12:10 pmDEN-SOF
15h 55m2 stops
6:00 am - 10:46 pmSOF-DEN
25h 46m2 stops
Mon, Aug 12 - Tue, Sep 17
4:05 pm - 11:00 pmDEN-SOF
21h 55m1 stop
6:00 am - 11:59 pmSOF-DEN
26h 59m2 stops
$852Lufthansa
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Sun, Aug 11 - Wed, Sep 11
4:05 pm - 6:45 pmDEN-SOF
17h 40m1 stop
6:30 am - 3:40 pmSOF-DEN
18h 10m1 stop
$856Lufthansa
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Mon, Aug 12 - Wed, Sep 11
11:20 am - 1:20 pmDEN-SOF
17h 00m2 stops
12:55 pm - 10:46 pmSOF-DEN
18h 51m2 stops
Wed, Aug 7 - Wed, Sep 11
9:40 am - 11:20 amDEN-SOF
16h 40m2 stops
6:00 am - 6:40 pmSOF-DEN
21h 40m1 stop
$861United Airlines
Find Deal
Wed, Aug 7 - Tue, Sep 17

Flights from Denver to Sofia - Travel Insights & Trends

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

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

The average price of all flights from Denver to Sofia clicked on KAYAK for each day over the last 12 months.
Your flight ticket price will generally be cheaper if you fly to Sofia on a Tuesday and more expensive on a Saturday. On your return trip to Denver, you should consider flying back on a Saturday, and avoid Mondays for better deals.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Denver to Sofia, 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 Denver to Sofia is February, where tickets cost $796 on average. On the other hand, the most expensive months are May and June, where the average cost of tickets is $1,617 and $1,585 respectively.

How far in advance should I book a flight from Denver to Sofia?

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from Denver to Sofia, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price on the flight from Denver to Sofia, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 28 days before departure.

Which airlines provide the cheapest flights from Denver to Sofia?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
The best deals for a one-way ticket found by KAYAK users over the last 3 days were on Lufthansa ($962) and British Airways ($1,038). The cheapest round-trip tickets were found on Turkish Airlines ($759) and British Airways ($819).

Good to know

Low season

January

High season

June

Cheapest flight

$446
Best time to beat the crowds with an average 18% drop in price.
Most popular time to fly with an average 29% increase in price.
Flight from Denver to Sofia

When to book flights from Denver to Sofia

Are your dates flexible? Find out the best times to travel from Denver to Sofia based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Denver to Sofia

  • What is the cheapest flight from Denver to Sofia?

    In the last 3 days, the lowest price for a flight from Denver to Sofia was $446 for a one-way ticket and $759 for a round-trip.

  • Do I need a passport to fly between Denver and Sofia?

    Yes, you'll most likely have to show a valid passport before boarding the plane in Denver and on arrival in Sofia.

  • Which aircraft models fly most regularly from Denver to Sofia?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Denver to Sofia?

    Star Alliance, and oneworld are the airline alliances operating flights between Denver and Sofia, with Star Alliance being the most commonly used for this route.

  • Which is the best airline for flights from Denver to Sofia, United Airlines or Turkish Airlines?

    The two airlines most popular with KAYAK users for flights from Denver to Sofia are United Airlines and Turkish Airlines. With an average price for the route of $1,198 and an overall rating of 7.4, United Airlines is the most popular choice. Turkish Airlines is also a great choice for the route, with an average price of $762 and an overall rating of 7.4.

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

    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 Denver to Sofia.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Sofia from Denver 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 Denver to Sofia?

    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 to Sofia with an airline and back to Denver with another airline. Booking your flights between Denver and SOF can sometimes prove cheaper using this method.

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

    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 to Sofia from Denver up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top 4 airlines serving from Denver to Sofia

 
See real verified KAYAK customer reviews for airlines flying from Denver to Sofia. 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 Denver to Sofia? 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
Turkish AirlinesOverall score based on 3699 reviews
7.5Entertainment
7.4Comfort
7.4Food
7.4Boarding
7.8Crew
Airline reviews

Only chicken as a meat dish through out the flight

10.0 ExcellentCardy, Apr 2024JFK - IST
Read more about Turkish Airlines reviews

Only chicken as a meat dish through out the flight

Nothing really was great as such. Seen other no name airlines perform better.

Quality of service on board was very inconsistent. FA service primarily seemed robotic and they barely engaged with passengers

I’m unclear why I had to pay extra for assigned seats as Turkish airlines did not honor the seating. We were placed across the aisle from each other on TK 34, and were seated behind one another on TK 694. Because my name was misspelled on e-ticket (Klawiter, instead of Klawitter) I could not log onto website to get the connection gate number in Istanbul. The monitors in the airport were a jumbled mess 1/2 Arabic and 1/2 English.

On line check in needs a lot of improvement. I tried and gave up.

Food not good, flight attendants not the best, not accommodating very ruff

the female flight attendant was racist towards me. I could tell she treated the two other passengers next to me with more softness.

Oh my god! For an13 hour flight they serve you food just one time. Also don’t be thirsty they give you a little small cup of soda to drink. They seem like their goal is to feed you one so they don’t have to be bothered with you. It quite surprise for such a long flight there are several times to eat at least three and the food was well lackluster. The food and lack of offering drinks which were always hot no ice provided.

We were traveling first class. Checkin counter lady and her manager, both were in bad mood and did not treat us well about checking in the handbag. The gate agent took care of it right away. I travel Turkish twice a year in first class. No one has ever refused to check in the hand bag. Not sure, why this agent and her manager refused. Everything else was excellent.

The 787 economy was a disaster for long haul. The space was too little compared to 777 or 747. Also the extremely low tray table behind the seat made any dining effort a nightmare. However, the movies were up to date, and the food taste was good, despite of terrible serving process caused by small space.

Flight delayed from Cape Town to Washington then got diverted to miami and in miami we had to fend for ourselves , im still trying to get to Shreveport now

I just wrote a text which was supposed to be for the flight from Denver to spokane not Frankfurt to Denver.

Good dinner and nice plane.Smootz flight. Breakfast had no sweet option. Seats hardly reclined.

Too many fees (but that seems to apply to all airlines nowadays)

Flight was on time. Staff were friendly. I paid for Economy Plus but was required to check my standard carry-on luggage due to lack of space on the aircraft. This cost me 30 minutes, unexpectedly, in waiting at the baggage claim. This experience did not meet my expectations.

Everything was very good. Boarding and takeoff were on time and organized. Had a good flight

Wheelchair assistance was not complete. The person left me at the departure gate without informing the groundstaff of my requirements. I had to walk to the departure counter to ask for help to reach the plane door. The crew informed me that in future they were not allowed to help passengers like me, senior citizen and Wheelchair passenger with placing their carry on bags in the overhead compartments!

Flight was delayed by over an hour and gate checked bags took 15 minutes to be delivered to the jet bridge.

Seats are way too snug for my hip to knee ratio and the recline on the seat in front of me made my experience worst. My legs had no room at all. Not a plane for people 6 ft or over unless you fly first class.

Delayed for maintenance issue?? Should have been addressed before boarding. Put my bag on an earlier flight, but didn’t ask if I wanted to change to an earlier flight. Arrived to find my bag locked up and no agent to be found when I landed.

Check-in very easy and smooth. Plane and crew were nice. Seat open next to me created more space. Food was fair but plentiful. Lots of movies and I was able to sleep some on the way to Munich. Very tight connection, about an hour. Fast through passport control and a bit of a walk to last G terminal gate but I made my connection to Palma. Unfortunately, my luggage did not make it. It is now almost 24 hours since I anded and still NO luggage. I know it landed last night on another flight. Local delivery should be today to my hotel in Palma but nothing yet. I asked about the tight connection when I checked in and was assured they would get my luggage to the connecting flight. Very disappointing it missed my flight but more disappointing that it has taken so long to arrive. Failure on the airlines and service to get my luggage to date.

I wish the flight attendant was a little bit kinder

The food wasn’t great and it would be nice if the airlines showed documentaries about the countries we are flying into.

Disappointed everytime. The app doesn't load the boarding passes. They have lots of agent that seem to be busy doing nothing with a long line waiting to get paper boarding passes. Food choices are poor. Entertainment is less than entertaining.

Horrible experience. Nothing to give to kids to keep them entertained.

I think I have bruises on my kneecaps. Do the seats have to be so close together these days? And if they are so close they really shouldn’t recline. I think when the gentleman in front of me reclined, the back of his head was on my chin. That being said the crew were always caring and polite, and the flight was on time and very safe. So I’m grateful for that.

I always try to book flights that don’t charge for baggage. Yet I was charged $75 for this flight.

Trouble keeps changing the time and I was booked different flight without knowing it was bad experience

I dropped my wallet under my seat on this flight with all of my money and credit card. I requested to be able to go back and retrieve it but Lufthansa denied my request. I went to the Customer Services and they called Lost and Found but I was told nothing found would be turned in until around 12:00pm. My next flight was leaving so I was unable to check to see if my wallet was turned in. I will never fly with Lufthansa again.

My concern is with Flight: 441 IAH-FRA I was very cramped in my seat and the person in front of me was reclined. I pulled my wallet out of my purse and when finished I did my best to cram it back into my purse. Our flight was very delayed and we were rebooked twice and lots of airport time. As I got off the flight I noticed that I had dropped my wallet( containing all my credit & debit bank cards + 240 US dollars & 240 Euros. I spoke to customer service & Lost &Found. I was denied access to look on the plane. Therefore I have been without money and given no help. Paula Bjork 503.545.6698

Not connecting flights. Missed my flight from Dublin to Liverpool because I arrived at Dublin one hour too late. For this mistake, they offered me a flight from Dublin to Manchester. Thats great and all, but I waste time and money to commute to Liverpool. Be sure to check the time of your connecting flights, because they sure don’t when they sell it to you

Excellent! Great flight attendants, good food (in business class, at least), very comfortable. Touchscreen and remote wasn’t great.

In economy and food was ok, but with limited leg space (and I was in a 2 seat configuration) it was difficult to eat with a tiny seat tray. I spilt wine on my trousers. First time on British Air (I usually fly Turkish Air) and in a 777. Heathrow was pleasant but changing terminals awkward.

Starting with the flight Cairo to London the plain was so poor no entertainment at all uncomfortable seats although it’s 5 hours long,then an American airline plain took me from London to Miami it was a bad experience the crew most of flight time not available and they asked us to help our selves for any snacks if we need. From Miami to London actually was perfect flight with a huge plain and perfect crew but from London to Cairo was horrible plain with stiff fixed seats not movable no entertainment or wi fi very poor Menu which is unacceptable for a business class

I've done hundreds of flights in my life, and this flight was one of the best I've ever taken, From beginning to end, everything went smoothly, professionally, and with a smile and friendly attitude from all employees I interacted with. The food was delicious (and free), as were the drinks. There was just a genial and effective way in the way that British Airways organized the flight -that reminded of days in the 70's, 80's, and 90's, when flying was a fun, and exciting adventure. I enjoyed and had confidence in the abilities of the flight crew, I'll be flying British Airways several more times this summer. Thank you so much for the great experience! Cheryl Olso

My baggage did not arrived with me. Took 3 days to get it after so may calls and follow up

Terrible! I missed my flight to my final destination and British airlines and American Airlines keep pointing fingers on each other’s. Nobody wants to take responsibility

Terrible. Flight was 3 hours delayed and I missed my other flight to my final destination

Overall, terrific service, accommodations, and experience. Only reason comfort was rated lower was because it was difficult to keep a comfortable sleeping position for the overnight flight, but I also had an economy seat.

Not sure if the crew were experiencing something unknown to me,but the service of passing water was non-existent.In addition,please take consideration when providing yogurt as alternative for breakfast as some of us, could be lactose intolerant.. thanks

Book cheap flights from Denver to Sofia

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Denver to Sofia found on KAYAK in the last 72 hours.
5/10Fri
3 stops
48h 05mDEN-SOF
$446
5/8Wed
2 stops
41h 48mDEN-SOF
$537
6/13Thu
3 stops
27h 35mDEN-SOF
$549
5/8Wed
3 stops
50h 23mDEN-SOF
$560
6/13Thu
2 stops
37h 50mDEN-SOF
$577
5/9Thu
2 stops
52h 24mDEN-SOF
$610
7/7Sun
2 stopsLufthansa
33h 36mDEN-SOF
$962
7/7Sun
1 stopBritish Airways
15h 35mDEN-SOF
$1,038
6/13Thu
1 stopTurkish Airlines
15h 45mDEN-SOF
$1,062
5/9Thu
1 stopLufthansa
13h 25mDEN-SOF
$1,397

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Last minute flights from Denver to Sofia

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from Denver to Sofia that are departing in the next 10 days.
5/3Fri
multi-stop
34h 15mDEN-SOF
5/7Tue
multi-stop
28h 35mSOF-DEN
$1,025
5/3Fri
multi-stop
30h 50mDEN-SOF
5/7Tue
multi-stop
24h 57mSOF-DEN
$1,339
5/3Fri
multi-stop
35h 20mDEN-SOF
5/7Tue
multi-stop
25h 16mSOF-DEN
$1,356
5/3Fri
multi-stop
30h 50mDEN-SOF
5/7Tue
multi-stop
26h 06mSOF-DEN
$1,360
5/3Fri
multi-stop
35h 20mDEN-SOF
5/7Tue
multi-stop
30h 50mSOF-DEN
$1,371
5/3Fri
multi-stop
42h 45mDEN-SOF
5/7Tue
multi-stop
17h 20mSOF-DEN
$1,447
5/4Sat
multi-stopTurkish Airlines
40h 50mDEN-SOF
5/11Sat
multi-stopTurkish Airlines
48h 04mSOF-DEN
$1,586
5/4Sat
multi-stopLufthansa
17h 40mDEN-SOF
5/11Sat
multi-stopLufthansa
17h 20mSOF-DEN
$1,879
5/3Fri
multi-stop
15h 25mDEN-SOF
5/7Tue
multi-stop
46h 08mSOF-DEN
$1,897
5/4Sat
multi-stop
17h 15mDEN-SOF
5/11Sat
multi-stop
14h 45mSOF-DEN
$1,912

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Denver - Sofia Flights

Departure:

Denver (DEN)United States

Destination:

Sofia (SOF)Bulgaria

Return flight deals:

Sofia - Denver

Cabin classes:

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