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DEN - SOF

$332 Find cheap flights from Denver to Sofia

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 8/9. 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
Sat 7/6
Sat 7/13

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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 43,995,393 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
4:05 pm - 11:00 pmDEN-SOF
21h 55m1 stop
6:30 am - 2:20 pmSOF-DEN
16h 50m2 stops
$916Lufthansa
Find Deal
Wed, Jul 10 - Fri, Aug 23
4:05 pm - 6:45 pmDEN-SOF
17h 40m1 stop
6:30 am - 3:40 pmSOF-DEN
18h 10m1 stop
$923Lufthansa
Find Deal
Wed, Jul 10 - Fri, Aug 23
7:45 am - 12:10 pmDEN-SOF
19h 25m2 stops
6:30 am - 7:36 pmSOF-DEN
22h 06m2 stops
$943Air Canada
Find Deal
Wed, Jul 10 - Fri, Aug 23
4:05 pm - 6:05 pmDEN-SOF
17h 00m2 stops
6:30 am - 2:20 pmSOF-DEN
16h 50m2 stops
$944Lufthansa
Find Deal
Wed, Jul 10 - Fri, Aug 23
4:05 pm - 11:00 pmDEN-SOF
21h 55m1 stop
6:30 am - 3:40 pmSOF-DEN
18h 10m1 stop
$948Lufthansa
Find Deal
Wed, Jul 10 - Fri, Aug 23
4:05 pm - 11:00 pmDEN-SOF
21h 55m1 stop
6:00 am - 2:20 pmSOF-DEN
17h 20m1 stop
$993Lufthansa
Find Deal
Tue, Jul 9 - Wed, Jul 31
5:35 pm - 6:45 pmDEN-SOF
16h 10m2 stops
6:00 am - 2:20 pmSOF-DEN
17h 20m1 stop
$1,047Lufthansa
Find Deal
Tue, Jul 9 - Wed, Jul 31
9:40 am - 11:20 amDEN-SOF
16h 40m2 stops
8:00 am - 11:15 pmSOF-DEN
24h 15m2 stops
$1,148United Airlines
Find Deal
Tue, Jul 9 - Wed, Jul 31
7:12 am - 2:35 pmDEN-SOF
22h 23m2 stops
6:55 am - 10:11 pmSOF-DEN
24h 16m3 stops
$4,738
Find Deal
Tue, Jul 9 - Wed, Jul 31

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 Thursdays 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 December, where tickets cost $703 on average. On the other hand, the most expensive months are June and May, where the average cost of tickets is $1,566 and $1,552 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 2 weeks before departure. For the absolute cheapest price, our data suggests you should book 56 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 Turkish Airlines ($428) and British Airways ($946). The cheapest round-trip tickets were found on Lufthansa ($916) and Air Canada ($943).

Good to know

Low season

March

High season

September

Cheapest flight

$332
Best time to beat the crowds with an average 12% drop in price.
Most popular time to fly and prices are also 2% lower on average.
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 $332 for a one-way ticket and $916 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 $771 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 5 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 3718 reviews
7.4Boarding
7.4Food
7.4Comfort
7.8Crew
7.5Entertainment
Airline reviews

Overnight flight in the old style Business class, but still very good.

10.0 ExcellentRobert, May 2024IAD - IST
Read more about Turkish Airlines reviews

Overnight flight in the old style Business class, but still very good.

I was in business class, without the business class amenities. Large seat with lots of legroom, but no TV or bed. Food was okay, but I did enjoy the Turkish red wine.

Excellent service and comfort from the moment you check in. Flight crew is hyper focused on making passengers comfortable and at ease. It’s like a flying hotel!

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.

Not worth the premium paid for the first class ticket

We liked the fully reclinable seats. Had center seats, so it was difficult to talk to spouse. Crew was great

Fine. Though no food or entertainment so the survey needs to be updated with those options.

This was a flight operated by Lufthansa. See me prior comments, which were meant for this experience. The CSA, Ashley, should be reprimanded if not fired for incompetence, being rude, and very, very slow. She was whispering to other CSAs, blaming my flight change on others, unable to give me a seat assignment, telling me could not help without offering any advice (I travel 200,000 miles a year and am a consultant to the airlines, so I know how this gets done PRETTY DAMN WELL). Then, she gave me literally the worst seat on the airline (yes, there were other seats open) - the one right next to the bathroom that was so bad the other PAX next to me left to move to another seat. My seat kept getting rammed (3x) by the crew with their carts (no turbulence to speak of), other passengers grabbing the seat to get in or out of the bathroom, and listening to the bathroom flush all night.

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 locked room where it was being kept.

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.

For such a long flight they should offer tea or coffee in between two meals.

No seat assignment . Last on board . Though I would not receive any boarding pass

last minute was rebooked. This rebooking made me miss my connection, added a stop in my itinerary without my approval, and had me arriving 10 hours later to my destination...for a delay that was 2 hours. To boot, my final flight from London to Athens booked me in a middle seat, where I originally booked all aisle seats. This was incredibly uncomfortable for a 24 hour journey and made me incredibly upset.

Did not appreciate “hidden fees” to check a bag for international flight and purchase a seat to be next to my spouse. Won’t choose this airline again.

The flight left over 2 hours late and caused me to miss my connecting flight. Consequently, I missed my cruise ship out of Barcelona. The cost associated with this miss was as follows: Airfare to Sicily Italy to get on the ship TWO days late - $232.30 Taxi from Airport to hotel $35 Dinner at hotel $38 Hotel in Barcelona - $208 Taxi from Sicily to hotel $70 Hotel in Sicily - $148 Prorated time missed on cruise $ 1,143

No meal. Flight crew was wonderful, happily finding me storage for my guitar. THANK YOU!!!

My seat was moved multiple times. I picked out the perfect seats beforehand. I even paid extra money for them. However, I was moved to a middle seat without warning at the last minute. It was like my worst nightmare. But other than that, the actual flight was good. Everything was on time or even early and the flight was smooth.

A220 plane had 5 seats across which is great for couples who can snag the A&C seats. Seat itself is borderline comfortable but still tough on a 5+ hour flight. Overhead bins are small so if you're not in at least boarding group 5, you could be in trouble. No included food service. Non-alcoholic drinks are free but even the most basic snacks are for a charge. Price was reasonable for the only direct SEA-YUL flight. Boarding is efficient even managing passport checks. Worth flying for the direct flight.

The original flight from Boston to Toronto was canceled because of a mechanical failure. I was then scheduled on a flight to go from Boston to Montreal and then Montreal to Toronto. The flight was extremely full and I had to check my carry-on bag. When I actually got on the plane there appeared to be room for my bag. I understand the mechanical failures happen. But it was frustrating that they pestered me to check my bag when I don't believe it was necessary. Additionally, not just with Air Canada, modern airline seats are incredibly uncomfortable. There is considerable research that shows that the shape of them is poor for back health.

Unable to initiate refund/reschedule the ticket #worst experience #lost 900$

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.

Poor, we had 1 hour to grab our checked luggage, go through customs, recheck bags and run across terminals to make our United flight. Poorly planned connections.

Check in in Albuquerque was awful. The people were great but they were over loaded. The procedures were terrible. We got through fine but it took 90+ minutes.

Will try to not fly with them again. Delays because of weather but got redirected to an airport where I could not make connection.

Staff didn’t care in business class. Closed the door on my mom while she was on the jetbridge and flight attendant told me she would make it from the connecting flight. They lied. My luggage was damaged on arrival. No success in filing damage claim.

Boston Logan is a crummy airport - signage is terrible or lacking in areas. Boarding seemed to be a free for all and with all the different airlines speaking, you couldn't tell who was supposed to be where and when. Plain and simple, airlines should board from the back of the plane to the front. Also someone was sitting in my seat. By the time that was figured out, I had to place my overhead behind me which made de-planing more difficult. Logan is not Lufthansa's fault so that is not on them, Boarding is on them! Still, overall it was a Good Experience flying with Lufthansa. This is not my first flight with them...

Overall, the flight was comfortable without any serious issues. Transit through Frankfurt airport was a little confusing, but not too difficult if you follow the signs

There was a screaming child behind our seats. This prevented us from getting any sleep during the night.

There was a screaming child just behind our seats. This prevented us from getting any sleep during the night!!

Staff disappeared after dinner service until breakfast, no help with beds, no help running to our gate to catch connection cause flight was late, our luggage didn’t make it, took over 24 hours to get luggage to hotel, no compensation!!

Economy class has no legroom so if you have the money worth to upgrade! Food was absolutely horrible! The crew was super nice!!!!!

The flight was provided by Aer Lingus and our seats were in a poor condition (15A & 15C). They looked like they needed repairing/replacing and were uncomfortable for such a long flight. Also the arm rests on Aer Lingus planes do not lift more than around 45 degrees, instead of the usual 90 degrees upright, meaning you cannot maximum the space between you & your travel companion so as to be more comfortable for such a long flight.

Flights were actually with Aer Lingus outward and American Airlines & Aer Lingus on the return journey. Outward flight with Aer Lingus was good but the return flight with them was not so good as our seats were in a poor condition (15A & 15C) and looked like they needed replacing! The American Airlines flight from Miami to JFK New York was good and the seats were very comfortable and spacious (32D & 32E)

Awful. Delay, lost vacation time and travel time now more than 24h

Awful. Flight delayed and we missed our long flight to Rome. It has been a nightmare and we have still not arrived. It was NOT a weather delay, just poor planning by AA

Boarding was as fast and efficient as possible. The flight crew were amazing and extremely friendly. We enjoyed our flight.

Very bed boarding, there was overbooked and make a lot of problems and noises

There was a problem in the luggage because there were not porters

On my way from Chicago to London, I was seated next to a quite heavy passenger. I could barely move. BA should have ensured that overweight customers are placed in comfortable seats and not to penalize also other passengers because BA is not willing to accommodate these passengers and their needs. No respect at all.

The flight as far as timings go was excellent. Unfortunately we ended up sat with someone on a night flight who had been drinking alcohol before boarding and BA staff were happily serving him more alcohol. He was very drunk which made our flight uncomfortable and awkward. My partner had this person lying on him whilst asleep. Alcohol should be served minimally. If there had been an emergency this person would not have been in a fit state to act accordingly.

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.
8/9Fri
3 stops
56h 46mDEN-SOF
$332
6/22Sat
3 stops
49h 45mDEN-SOF
$426
8/9Fri
1 stopTurkish Airlines
34h 20mDEN-SOF
$428
6/22Sat
3 stops
27h 35mDEN-SOF
$454
8/9Fri
2 stops
20h 15mDEN-SOF
$459
6/24Mon
1 stopBritish Airways
16h 50mDEN-SOF
$946
6/23Sun
1 stopLufthansa
21h 55mDEN-SOF
$964
6/22Sat
1 stopLufthansa
17h 40mDEN-SOF
$965
6/20Thu
1 stopUnited Airlines
17h 40mDEN-SOF
$1,037
6/21Fri
1 stopTurkish Airlines
27h 55mDEN-SOF
$1,068

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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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