Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Denver to Sofia from $518

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Denver to Sofia departing on 12/5. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Denver to Sofia (DEN-SOF)

Cheap round-trip flights

Turkish Airlines Logo
8:20 pm - 8:50 pmDEN-SOF
16h 30m1 stop
Turkish Airlines Logo
10:05 am - 5:35 pmSOF-DEN
16h 30m1 stop
$577Turkish Airlines
Find Deal
Tue, Oct 28 - Sat, Nov 8
Turkish Airlines Logo
8:20 pm - 8:50 pmDEN-SOF
16h 30m1 stop
Turkish Airlines Logo
10:05 am - 5:35 pmSOF-DEN
16h 30m1 stop
$600Turkish Airlines
Find Deal
Tue, Oct 28 - Sat, Nov 8
United Airlines Logo
4:20 pm - 6:20 pmDEN-SOF
17h 00m1 stop
United Airlines Logo
6:00 am - 4:00 pmSOF-DEN
19h 00m1 stop
$604United Airlines
Find Deal
Tue, Nov 18 - Thu, Nov 27
American Airlines Logo
9:11 am - 4:20 pmDEN-SOF
22h 09m2 stops
American Airlines Logo
5:25 pm - 8:17 pmSOF-DEN
35h 52m2 stops
$610American Airlines
Find Deal
Sun, Nov 2 - Mon, Nov 10
United Airlines Logo
8:20 pm - 6:20 pmDEN-SOF
13h 00m1 stop
United Airlines Logo
2:20 pm - 7:55 pmSOF-DEN
38h 35m2 stops
$620United Airlines
Find Deal
Sun, Nov 2 - Mon, Nov 10
Logo
11:34 am - 1:55 pmDEN-SOF
17h 21m2 stops
Logo
7:00 am - 3:39 pmSOF-DEN
17h 39m2 stops
$636
Find Deal
Tue, Nov 18 - Thu, Nov 27
Lufthansa Logo
5:20 pm - 6:20 pmDEN-SOF
17h 00m1 stop
Lufthansa Logo
6:10 am - 4:00 pmSOF-DEN
18h 50m1 stop
$641Lufthansa
Find Deal
Tue, Oct 28 - Sun, Nov 9
Lufthansa Logo
5:25 pm - 6:20 pmDEN-SOF
16h 55m2 stops
Lufthansa Logo
6:10 am - 4:00 pmSOF-DEN
18h 50m1 stop
$645Lufthansa
Find Deal
Tue, Oct 28 - Sun, Nov 9
American Airlines Logo
4:00 pm - 8:10 pmDEN-SOF
20h 10m2 stops
American Airlines Logo
12:05 pm - 9:31 amSOF-DEN
30h 26m2 stops
$660American Airlines
Find Deal
Tue, Oct 28 - Sat, Nov 8
Logo
4:20 pm - 6:20 pmDEN-SOF
17h 00m1 stop
Logo
6:00 am - 5:44 pmSOF-DEN
20h 44m2 stops
$705
Find Deal
Tue, Nov 18 - Thu, Nov 27

Turkish Airlines flights from Denver to Sofia

Our best Turkish Airlines deals on Denver to Sofia flight tickets
Turkish Airlines
Oct 28
DEN8:20 pmDenver Intl
16h 30m
1 stop
SOF8:50 pmSofia
Nov 8
SOF10:05 amSofia
16h 30m
1 stop
DEN5:35 pmDenver Intl
$577
Find similar
Turkish Airlines
Oct 28
DEN8:20 pmDenver Intl
16h 30m
1 stop
SOF8:50 pmSofia
Nov 8
SOF10:05 amSofia
16h 30m
1 stop
DEN5:35 pmDenver Intl
$600
Find similar
Turkish Airlines
Nov 18
DEN7:20 pmDenver Intl
16h 30m
1 stop
SOF8:50 pmSofia
Nov 27
SOF10:05 amSofia
16h 30m
1 stop
DEN5:35 pmDenver Intl
$695
Find similar

British Airways flights from Denver to Sofia

Our best British Airways deals on Denver to Sofia flight tickets
British Airways
Oct 28
DEN6:25 pmDenver Intl
17h 45m
1 stop
SOF8:10 pmSofia
Nov 9
SOF2:30 pmSofia
34h 00m
1 stop
DEN3:30 pmDenver Intl
$648
Find similar
British Airways
Oct 28
DEN10:42 amDenver Intl
25h 28m
2 stops
SOF8:10 pmSofia
Nov 9
SOF2:30 pmSofia
34h 00m
1 stop
DEN3:30 pmDenver Intl
$674
Find similar
British Airways
Dec 14
DEN5:25 pmDenver Intl
13h 55m
1 stop
SOF4:20 pmSofia
Dec 20
SOF12:05 pmSofia
36h 25m
1 stop
DEN3:30 pmDenver Intl
$766
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Denver to Sofia that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated August 26, 2025.
Use the filters below to find and compare flights from Denver to Sofia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Tue 10/28

8:20 pm-8:50 pm

1 stop16h 30m

Sofia

Sat 11/8

10:05 am-5:35 pm

1 stop16h 30m

$577

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Tue 10/28

8:20 pm-8:50 pm

1 stop16h 30m

Sofia

Sat 11/8

10:05 am-5:35 pm

1 stop16h 30m

$600

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Tue 11/18

4:20 pm-6:20 pm

1 stop17h 00m

Sofia

Thu 11/27

6:00 am-4:00 pm

1 stop19h 00m

$604

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Sun 11/2

9:11 am-4:20 pm

2 stops22h 09m

Sofia

Mon 11/10

5:25 pm-8:17 pm

2 stops35h 52m

$610

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Sun 11/2

8:20 pm-6:20 pm

1 stop13h 00m

Sofia

Mon 11/10

2:20 pm-7:55 pm

2 stops38h 35m

$620

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Tue 11/18

11:34 am-1:55 pm

2 stops17h 21m

Sofia

Thu 11/27

7:00 am-3:39 pm

2 stops17h 39m

$636

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Tue 10/28

5:20 pm-6:20 pm

1 stop17h 00m

Sofia

Sun 11/9

6:10 am-4:00 pm

1 stop18h 50m

$641

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Tue 10/28

5:25 pm-6:20 pm

2 stops16h 55m

Sofia

Sun 11/9

6:10 am-4:00 pm

1 stop18h 50m

$645

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Tue 10/28

4:00 pm-8:10 pm

2 stops20h 10m

Sofia

Sat 11/8

12:05 pm-9:31 am

2 stops30h 26m

$660

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Tue 11/18

4:20 pm-6:20 pm

1 stop17h 00m

Sofia

Thu 11/27

6:00 am-5:44 pm

2 stops20h 44m

$705

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 17 resultsSorted by cheapest first
1
2

See travel insights to Sofia from

How to get the cheapest flight ticket from Denver to Sofia

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Sofia?

The cheapest month to fly to Sofia from Denver is in April. Flight prices, which tend to average around $535, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of April, then book flights to Sofia from Denver during February instead. Flights to Sofia in February, while not as cheap as those in April, still average around $614.

What is the cheapest day to depart on your flight to Sofia?

According to our data, Thursday is the cheapest day to fly to Sofia from Denver. The lowest ticket price found for a Thursday departure recently was $781. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Flights from Denver to Sofia on a Saturday will generally be more expensive and average around $1,343. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Sofia?

In the evening is the cheapest time of day to fly from Denver to Sofia when you can find flight prices for as low as $784. Flying to Sofia in the evening is an ideal time because this is during off-peak travel hours. In the morning is when there is more demand to fly to Sofia, so prices are often more expensive at around $1,319 per ticket.

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

You are more likely to see cheaper flights to Sofia from Denver when booking weeks ahead of your departure date. In general, you can expect to find flights to Sofia for around $921 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Sofia from Denver for as low as $736 on momondo.

When to book flights from Denver to Sofia

Are you open to changing your travel dates? Check out the ideal times to fly from Denver to Sofia according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Denver to Sofia (DEN to SOF) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Denver to Sofia

Direct flights

None
There are no direct flights from Denver to Sofia. There are no popular flight routes from Denver to Sofia.
Search flight deals

  • How far is Denver Intl to Sofia by plane?

    There are 5884.6 mi between Denver Intl and Sofia. Typically, this will take 13h 00m by plane in normal conditions.

  • When did momondo last update prices for flights from Denver Intl Airport to Sofia Airport?

    Prices for flights from Denver Intl Airport to Sofia Airport were last updated today.

  • How many operators does momondo search for flights from Denver Intl Airport to Sofia Airport?

  • How old do you have to be to fly from Denver Intl Airport to Sofia Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Denver Intl Airport to Sofia Airport.

  • What documentation or ID do you need to fly to Sofia Airport?

    The required travel and health documents for your Sofia Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Sofia Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular airline from Denver to Sofia?

Best airlines flying from Denver to Sofia

Compare and see reviews for airlines that fly from Denver to Sofia with momondo
Airline
Rating
Free Cancellation
Price
Turkish AirlinesPriceFrom $522Free CancellationRating
7.3
3,955 reviews
Search Turkish Airlines flights
LufthansaPriceFrom $672Free CancellationRating
6.8
7,359 reviews
Search Lufthansa flights
United AirlinesPriceFrom $687Free CancellationRating
7.4
8,943 reviews
Search United Airlines flights

Traveling to a place near Sofia?

Book flights to Sofia if you plan to visit one of these locations
Bansko
Borovets
Velingrad
Sandanski

Why use momondo?

Why should I use momondo to find a flight deal from Denver to Sofia?

It is quick and easy to find Denver to Sofia flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Sofia that suits you.

Can I find flights from Denver to Sofia with flexible booking policies on momondo?

Yes. All flights to Sofia from Denver on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Denver to Sofia?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Sofia from Denver.

I’m not ready to book a flight from Denver to Sofia right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Denver to Sofia now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Sofia and let you know when they change.

An easier way to manage your Sofia trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Sun 8/31
Sun 9/7
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Bulgaria

Fly your favorite airline to Sofia

Airlines are sorted and displayed according to clicks in the past 7 days on momondo
Delta
American Airlines
United Airlines
Turkish Airlines
Lufthansa
Frontier
British Airways
Qatar Airways
Spirit Airlines
Ryanair
Emirates
Alaska Airlines