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SOF - DEN

$746 Find cheap flights from Sofia to Denver

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 Denver departing on 9/27. 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
sáb. 7/13
sáb. 7/20

Search hundreds of travel sites at once for deals on flights to Denver

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Sofia to Denver, 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 Denver, as well as popular online travel agencies
In the last 7 days travelers have searched 44,216,777 times on KAYAK, and here is why:

Save 21% or moreCompare multiple travel sites with one search.

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

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Sofia to Denver 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
6:30 am - 8:45 amSOF-DEN
35h 15m2 stops
1:25 pm - 6:45 pmDEN-SOF
20h 20m2 stops
$746United Airlines
Find Deal
vie., sep. 27 - vie., oct. 11
9:20 am - 5:40 pmSOF-DEN
17h 20m1 stop
7:35 pm - 2:55 pmDEN-SOF
34h 20m1 stop
$757Turkish Airlines
Find Deal
vie., sep. 27 - vie., oct. 11

Flights from Sofia to Denver - Travel Insights & Trends

Get data-powered insights and trends into flights from Sofia to Denver 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 Sofia to Denver?

The average price of all flights from Sofia to Denver clicked on KAYAK for each day over the last 12 months.
For Sofia to Denver, Saturday is the cheapest day to fly on average and Monday is the most expensive. Flying from Denver back to Sofia, the best deals are generally found on Tuesday, with Saturday being the most expensive.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Sofia to Denver, 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 Denver is November, where tickets cost $736 on average. On the other hand, the most expensive months are January and September, where the average cost of tickets is $1,289 and $1,127 respectively.

Good to know

Low season

January

High season

July

Cheapest flight

$746
Best time to beat the crowds but there is an average 45% increase in price.
Most popular time to fly and prices are also 16% lower on average.
Flight from Sofia to Denver

When to book flights from Sofia to Denver

Are your dates flexible? Find out the best times to travel from Sofia to Denver 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 Sofia to Denver

  • What is the cheapest flight from Sofia to Denver?

    In the last 3 days, the lowest price for a flight from Sofia to Denver was $746 for a round-trip ticket.

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

    Yes, you’ll need a passport to travel to Denver from Sofia.

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

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

  • Which airline alliances offer flights from Sofia to Denver?

    Star Alliance is the only airline alliance operating flights between Sofia and Denver.

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

    The two airlines most popular with KAYAK users for flights from Sofia to Denver are United Airlines and Turkish Airlines. With an average price for the route of $816 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 $697 and an overall rating of 7.4.

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

    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 Denver.

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

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

    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 Denver with an airline and back to Sofia with another airline. Booking your flights between Sofia and DEN 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 Sofia to Denver?

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

See more FAQs

Top 3 airlines serving from Sofia to Denver

 
See real verified KAYAK customer reviews for airlines flying from Sofia to Denver. 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 Denver? 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 3716 reviews
7.4Comfort
7.5Entertainment
7.8Crew
7.4Food
7.4Boarding
Airline reviews

Great service, great food, and comfortable business class seats... Friendly and professional flight attendants and ground crew, overall 5 star experience!

10.0 ExcellentJohn, May 2024IST - IAH
Read more about Turkish Airlines reviews

Great service, great food, and comfortable business class seats... Friendly and professional flight attendants and ground crew, overall 5 star experience!

Movie selection was ok, but could be better. Would like to see greater selection of newer movies.

Loved the check-in experience. Very friendly staff and not crowded. I did wind up with a middle-middle seat, which was quite uncomfortable. Always appreciate the very professional staff on TAL.

Paying for reserved seats and never received the seats I paid for !! Just fake and a surprise out of their " box "

Turkish airline always good Only Turkish representatives at the gave need to be more helpfull to any staff who traveling on Turkish airline . One situation happened Ist to jfk on Feb 29 TK3 had seats I asked them to transfer me to tk3 because Feb 29 tk1 was oversold and they advise me that I might not make it for tk1 I asked them to transfer me to tk3 and they say no they can’t do it I been telling them you know that I don’t have a chance for tk 1 why would you let plane go with some empty seats on tk3 if you can transfer me to tk3 and have less staff on tk1 and still told me no I waited for tk1 9 hours and only last minute I got seat on tk1 It was not easy situation but I am glad I made it home Thank you Turkish Airline One more suggestion for Turkish Airline you need to make a FIRST CLASS cabin it would be so cool 🆒 Good luck all the best See you more

First class payment but wife’s seat broken, would recline but not lay flat. On previous flight, delays and ground crew malfunctions connecting jetway made us miss flight to Houston. I asked twice for a cart to assist us getting across the massive Istanbul Airport, but was denied. We are both over 70.

My flight had two legs. When checking in at the first leg the agent offering for a deal to upgrade the leg to first class for $199. He then claimed I would be able to upgrade the second leg once I got to the next airport. I declined and when I inquired about upgrading at the second airport, the cost was $1,300. I also had an issue at the airport lounge. I am allowed one guest in the lounge. My friend came in the lounge for less than 5 minutes and left when she couldn’t get a sleeping suite. I wanted to bring in another friend. The airport staff first started acting as though they didn’t understand English and then became upset when I asked for their names so I could file a complaint. As an elite member I knew they could do more but were not. One of the agents started over talking me and walked away mid conversation dismissing my request for assistance. A man claiming to be the manager said you were asking for her name. He also never tried to assist me or see what was going on. He claimed the interactions were recorded and management would see everything. I’m not sure how that would assist me days later. I am sure it didn’t help that I was a black American woman.

Better attitude training for staff at airport, better training for flight attendants, better food, don’t put us with all the crying babies that cried nonstop for 12 plus hours.

Crew announced boarding started and they asked passengers to form a queue. Actual boarding didn’t start and queue was not moving for around 40-50 mins. Very poor management.

It was a terrible airline. The air hostess and the people in the flight, just very rude.

Horrible, the flights kept delaying, so it is obvious that we won't be able to make it to the next connection. No easier/real agent on site to help you figure this out. UA agent on other counters refuse to assist you and direct us to use the QR code/call customer service. So inefficient and poor. While technology seems convenient, but it's not the best interest/experience for customers need help while there is active issue need assistance.

Not worth the price of premium class ticket paid, felt more like steerage.

I have to wait for plane in Denver for three hours. I don’t receive my luggage in Denver. I come back home without the luggage and I wait till next day to see my luggage again. Not really good experience with United airlines. I’m sorry to say that.

The Wi-Fi was unavailable on this flight for some reason.

This was a Lufthansa flight, not United. The CSA at the counter, Ashley, was not only incompetent, but quite rude. Me and two other PAX waited over 7 minutes standing in front of her and another CSA and they ignored us. We joked that we must have accidently taken invisibility pills. She could have at least said "I'll be with you in a moment, I'm currently....". I could go on about how rude she and the other CSAs were (whispering, not communicating with me, blaming the situation on others, etc.). She would not work for me. Then, she gave me literally the worst seat on the plane. the worst. My seat kept getting bumped (rammed twice by the crew with their carts and about every 5 minutes by someone using the bathroom), listening to the bathroom all night, crowded seat, etc.

We ended up with seats in the very back. So they did not recline. Have no idea why, we reserved and checked in very early. The isles were very narrow and the seats had very little leg room. But they did give us water, and a snack.

I paid $380 for my one-way ticket from California to Minnesota. The fair did not include online check-in. I received instructions from their app to check in at a kiosk. At the kiosk, the boarding pass would not print until an actual person came to verify that I had a personal item and not a carry-on item, On the plane, the person next to me was drunk and allowed to continue to order alcohol. United is garbage I’d rather fly spirit.

The plane was dirty and the in seat air wasn't blowing as planes usually do.

Generally good but there wasn’t any staff available when my luggage didn’t appear at baggage claim in Fresno. It took about half an hour to locate a staff member to open up the room where it was being kept.

T hey did a great job. Flight was on time .

I wasn’t able to make my flight due to Kayak’s inability to simply update my name on my trip from Nick to Nicholas. I would like a refund.

The flight left an hour late and no explanation. Food was basically a few snacks out of bags and tiny cup of soda. Crew was pretty friendly.

United delayed the flight to assist customers to make the connection. The Ohara customs area was overwhelm which created an issue for customers trying to make the Little Rock connection. The delayed allow several customers to make the final flight into Little Rock.

The trip was good except for the delay that caused a connection issue in Chicago.

Terrible. Missed our flight to Newark as well as our flight to London. Complete disaster

The flight was wondering, especially the special assistance from airplane to airplane!

The flight was wonderful, especially the special assistance from airplane to airplane!

They canceled our flight last minute and we had to get another flight with twice the cost

Captain waited 45 minutes for late passengers boarding from Washington DC to Munich which was nice for them but caused our luggage to miss boarding our connection on to Bucharest. We then did not receive our luggage for about 48 hours after landing which was very inconvenient for our travel.

The worst experience of my life and I have been flying for 33 years

Book cheap flights from Sofia to Denver

One-way flight deals

multi-stopMultiple Airlines
5871 miSOF-DEN

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Last minute flights from Sofia to Denver

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 Sofia to Denver that are departing in the next 10 days.
6/18mar.
multi-stopAir Canada
29h 22mSOF-DEN
10/5sáb.
multi-stopAir Canada
17h 00mDEN-SOF
$817
6/18mar.
multi-stop
29h 22mSOF-DEN
10/5sáb.
multi-stop
21h 55mDEN-SOF
$819
6/18mar.
multi-stopLufthansa
17h 20mSOF-DEN
10/5sáb.
multi-stopLufthansa
21h 55mDEN-SOF
$833
6/18mar.
multi-stop
33h 12mSOF-DEN
10/5sáb.
multi-stop
31h 20mDEN-SOF
$1,377
6/18mar.
multi-stop
33h 12mSOF-DEN
10/5sáb.
multi-stop
22h 10mDEN-SOF
$1,419

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Sofia - Denver Flights

Departure:

Sofia (SOF)Bulgaria

Destination:

Denver (DEN)United States

Return flight deals:

Denver - Sofia

Cabin classes:

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