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Cheap flights from Denver to Sofia from $525

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 4/15. 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

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Find the cheapest flights from Denver to Sofia

Cheap round-trip flights

Enter your travel dates to find the best prices.
British Airways Logo
6:40 pm - 7:20 pm
DEN
-
SOF
15h 40m
1 stop
British Airways Logo
8:10 pm - 4:30 pm
SOF
-
DEN
29h 20m
1 stop
$536British Airways
Sun, Aug 9 - Mon, Aug 24
Lufthansa Logo
4:15 pm - 11:00 pm
DEN
-
SOF
21h 45m
1 stop
Lufthansa Logo
6:40 pm - 3:40 pm
SOF
-
DEN
30h 00m
1 stop
$557Lufthansa
Tue, Aug 11 - Tue, Aug 25
Lufthansa Logo
4:15 pm - 11:00 pm
DEN
-
SOF
21h 45m
1 stop
Lufthansa Logo
6:40 pm - 3:40 pm
SOF
-
DEN
30h 00m
1 stop
$559Lufthansa
Sun, Aug 9 - Tue, Aug 25
Multiple Airlines Logo
11:30 am - 12:10 pm
DEN
-
SOF
15h 40m
2 stops
Multiple Airlines Logo
6:40 pm - 3:40 pm
SOF
-
DEN
30h 00m
1 stop
$567Multiple Airlines
Tue, Aug 11 - Tue, Aug 25
Lufthansa Logo
11:30 am - 12:10 pm
DEN
-
SOF
15h 40m
2 stops
Lufthansa Logo
7:00 pm - 1:30 pm
SOF
-
DEN
27h 30m
1 stop
$569Lufthansa
Mon, Aug 10 - Mon, Aug 24
Lufthansa Logo
4:15 pm - 11:00 pm
DEN
-
SOF
21h 45m
1 stop
Lufthansa Logo
7:00 pm - 1:30 pm
SOF
-
DEN
27h 30m
1 stop
$585Lufthansa
Mon, Aug 10 - Mon, Aug 24
British Airways Logo
6:37 pm - 8:30 pm
DEN
-
SOF
40h 53m
2 stops
British Airways Logo
8:10 pm - 9:55 pm
SOF
-
DEN
34h 45m
2 stops
$589British Airways
Mon, Aug 10 - Mon, Aug 24
Turkish Airlines Logo
8:25 pm - 8:15 pm
DEN
-
SOF
14h 50m
1 stop
Turkish Airlines Logo
9:35 am - 6:25 pm
SOF
-
DEN
17h 50m
1 stop
$597Turkish Airlines
Tue, Apr 7 - Tue, Apr 14
Lufthansa Logo
4:05 pm - 11:00 pm
DEN
-
SOF
21h 55m
1 stop
Lufthansa Logo
6:10 am - 2:20 pm
SOF
-
DEN
17h 10m
1 stop
$598Lufthansa
Wed, Apr 1 - Fri, Apr 10
Turkish Airlines Logo
8:25 pm - 8:15 pm
DEN
-
SOF
14h 50m
1 stop
Turkish Airlines Logo
3:50 pm - 6:25 pm
SOF
-
DEN
35h 35m
1 stop
$606Turkish Airlines
Tue, Apr 28 - Mon, May 18

British Airways flights from Denver to Sofia

Our best British Airways deals on Denver to Sofia flight tickets
British Airways
Aug 9
DEN6:40 pmDenver Intl
15h 40m
1 stop
SOF7:20 pmSofia
Aug 24
SOF8:10 pmSofia
29h 20m
1 stop
DEN4:30 pmDenver Intl
$536
British Airways
Aug 10
DEN6:37 pmDenver Intl
40h 53m
2 stops
SOF8:30 pmSofia
Aug 24
SOF8:10 pmSofia
34h 45m
2 stops
DEN9:55 pmDenver Intl
$589
British Airways
Aug 9
DEN6:40 pmDenver Intl
15h 40m
1 stop
SOF7:20 pmSofia
Aug 23
SOF9:05 pmSofia
28h 25m
1 stop
DEN4:30 pmDenver Intl
$616

Lufthansa flights from Denver to Sofia

Our best Lufthansa deals on Denver to Sofia flight tickets
Lufthansa
Aug 11
DEN4:15 pmDenver Intl
21h 45m
1 stop
SOF11:00 pmSofia
Aug 25
SOF6:40 pmSofia
30h 00m
1 stop
DEN3:40 pmDenver Intl
$557
Lufthansa
Aug 9
DEN4:15 pmDenver Intl
21h 45m
1 stop
SOF11:00 pmSofia
Aug 25
SOF6:40 pmSofia
30h 00m
1 stop
DEN3:40 pmDenver Intl
$559
Lufthansa
Aug 10
DEN11:30 amDenver Intl
15h 40m
2 stops
SOF12:10 pmSofia
Aug 24
SOF7:00 pmSofia
27h 30m
1 stop
DEN1:30 pmDenver Intl
$569

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 March 7, 2026.
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

Cheapest round-trip

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Sun 8/9

6:40 pm-7:20 pm

1 stop15h 40m

Sofia

Mon 8/24

8:10 pm-4:30 pm

1 stop29h 20m

$536

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Tue 8/11

4:15 pm-11:00 pm

1 stop21h 45m

Sofia

Tue 8/25

6:40 pm-3:40 pm

1 stop30h 00m

$557

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Sun 8/9

4:15 pm-11:00 pm

1 stop21h 45m

Sofia

Tue 8/25

6:40 pm-3:40 pm

1 stop30h 00m

$559

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Tue 8/11

11:30 am-12:10 pm

2 stops15h 40m

Sofia

Tue 8/25

6:40 pm-3:40 pm

1 stop30h 00m

$567

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Mon 8/10

11:30 am-12:10 pm

2 stops15h 40m

Sofia

Mon 8/24

7:00 pm-1:30 pm

1 stop27h 30m

$569

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Mon 8/10

4:15 pm-11:00 pm

1 stop21h 45m

Sofia

Mon 8/24

7:00 pm-1:30 pm

1 stop27h 30m

$585

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Mon 8/10

6:37 pm-8:30 pm

2 stops40h 53m

Sofia

Mon 8/24

8:10 pm-9:55 pm

2 stops34h 45m

$589
Quickest round-trip

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Tue 4/7

8:25 pm-8:15 pm

1 stop14h 50m

Sofia

Tue 4/14

9:35 am-6:25 pm

1 stop17h 50m

$597

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Wed 4/1

4:05 pm-11:00 pm

1 stop21h 55m

Sofia

Fri 4/10

6:10 am-2:20 pm

1 stop17h 10m

$598

DenverSofia

DEN - SOF

DENSOF

Denver Intl

Tue 4/28

8:25 pm-8:15 pm

1 stop14h 50m

Sofia

Mon 5/18

3:50 pm-6:25 pm

1 stop35h 35m

$606

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 14 resultsSorted by cheapest first
1
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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 November. Flight prices, which tend to average around $596, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of November, then book flights to Sofia from Denver during March instead. Flights to Sofia in March, while not as cheap as those in November, still average around $627.

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 $772 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 $642 on momondo.

Can stopping save me money on Denver to Sofia flights?

You could potentially save up to 54% on your flight if you consider stops on a Denver to Sofia flight.

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

Fastest flight time

14h 50m

Direct flights

None
The fastest flight from Denver to Sofia takes 14h 50m
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 14h 50m 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 $535Free CancellationRating
7.3
4,248 reviews
Search Turkish Airlines flights
LufthansaPriceFrom $616Free CancellationRating
6.8
7,833 reviews
Search Lufthansa flights
United AirlinesPriceFrom $686Free CancellationRating
7.4
9,405 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.

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Fly your favorite airline to Sofia

Airlines are sorted and displayed according to clicks in the past 7 days on momondo
Turkish Airlines
United Airlines
Lufthansa