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Cheap flights from Denver to Sofia from $397

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 3/16. 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 - 8:30 pm
DEN
-
SOF
16h 50m
1 stop
British Airways Logo
9:25 pm - 4:30 pm
SOF
-
DEN
28h 05m
1 stop
$576British Airways
tis, mar 31 - ons, maj 6
Multiple Airlines Logo
7:05 am - 2:00 pm
DEN
-
SOF
21h 55m
2 stops
Multiple Airlines Logo
7:00 am - 7:42 pm
SOF
-
DEN
21h 42m
2 stops
$590Multiple Airlines
tis, mar 31 - tis, apr 14
United Airlines Logo
11:10 am - 6:10 pm
DEN
-
SOF
22h 00m
2 stops
United Airlines Logo
6:10 am - 1:35 pm
SOF
-
DEN
16h 25m
1 stop
$594United Airlines
sön, apr 5 - tis, maj 5
KLM Logo
10:50 am - 2:00 pm
DEN
-
SOF
18h 10m
2 stops
KLM Logo
7:00 am - 7:51 pm
SOF
-
DEN
21h 51m
2 stops
$595KLM
ons, apr 1 - fre, apr 10
United Airlines Logo
11:10 am - 6:10 pm
DEN
-
SOF
22h 00m
2 stops
United Airlines Logo
6:20 am - 7:00 pm
SOF
-
DEN
21h 40m
2 stops
$597United Airlines
sön, apr 5 - ons, maj 6
United Airlines Logo
9:35 am - 6:00 pm
DEN
-
SOF
23h 25m
2 stops
United Airlines Logo
6:30 am - 7:00 pm
SOF
-
DEN
21h 30m
2 stops
$599United Airlines
tis, mar 31 - tors, maj 7
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
$602Turkish Airlines
tis, mar 31 - tis, apr 14
United Airlines Logo
9:35 am - 6:00 pm
DEN
-
SOF
23h 25m
2 stops
United Airlines Logo
6:10 am - 6:13 pm
SOF
-
DEN
21h 03m
2 stops
$603United Airlines
tis, mar 31 - tis, maj 5
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
$609Turkish Airlines
tors, apr 9 - tors, apr 16
United Airlines Logo
3:45 pm - 11:00 pm
DEN
-
SOF
22h 15m
2 stops
United Airlines Logo
6:20 am - 1:35 pm
SOF
-
DEN
16h 15m
1 stop
$615United Airlines
mån, mar 30 - ons, maj 6

Turkish Airlines flights from Denver to Sofia

Our best Turkish Airlines deals on Denver to Sofia flight tickets
Turkish Airlines
Mar 31
DEN8:25 pmDenver Intl
14h 50m
1 stop
SOF8:15 pmSofia
Apr 14
SOF9:35 amSofia
17h 50m
1 stop
DEN6:25 pmDenver Intl
$602
Turkish Airlines
Apr 9
DEN8:25 pmDenver Intl
14h 50m
1 stop
SOF8:15 pmSofia
Apr 16
SOF9:35 amSofia
17h 50m
1 stop
DEN6:25 pmDenver Intl
$609
Turkish Airlines
Apr 2
DEN8:25 pmDenver Intl
14h 50m
1 stop
SOF8:15 pmSofia
May 6
SOF9:05 pmSofia
30h 20m
1 stop
DEN6:25 pmDenver Intl
$650

British Airways flights from Denver to Sofia

Our best British Airways deals on Denver to Sofia flight tickets
British Airways
Mar 31
DEN6:40 pmDenver Intl
16h 50m
1 stop
SOF8:30 pmSofia
May 6
SOF9:25 pmSofia
28h 05m
1 stop
DEN4:30 pmDenver Intl
$576
British Airways
Apr 28
DEN6:40 pmDenver Intl
16h 50m
1 stop
SOF8:30 pmSofia
May 18
SOF8:10 pmSofia
35h 35m
2 stops
DEN10:45 pmDenver Intl
$621
British Airways
Apr 28
DEN12:24 pmDenver Intl
23h 06m
2 stops
SOF8:30 pmSofia
May 18
SOF8:10 pmSofia
35h 35m
2 stops
DEN10:45 pmDenver Intl
$625

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 februari 27, 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

DenverSofia

DEN - SOF

DENSOF

Denver Intl

tis 3/31

6:40 pm-8:30 pm

1 stop16h 50m

Sofia

ons 5/6

9:25 pm-4:30 pm

1 stop28h 05m

$576

DenverSofia

DEN - SOF

DENSOF

Denver Intl

tis 3/31

7:05 am-2:00 pm

2 stops21h 55m

Sofia

tis 4/14

7:00 am-7:42 pm

2 stops21h 42m

$590

DenverSofia

DEN - SOF

DENSOF

Denver Intl

sön 4/5

11:10 am-6:10 pm

2 stops22h 00m

Sofia

tis 5/5

6:10 am-1:35 pm

1 stop16h 25m

$594

DenverSofia

DEN - SOF

DENSOF

Denver Intl

ons 4/1

10:50 am-2:00 pm

2 stops18h 10m

Sofia

fre 4/10

7:00 am-7:51 pm

2 stops21h 51m

$595

DenverSofia

DEN - SOF

DENSOF

Denver Intl

sön 4/5

11:10 am-6:10 pm

2 stops22h 00m

Sofia

ons 5/6

6:20 am-7:00 pm

2 stops21h 40m

$597

DenverSofia

DEN - SOF

DENSOF

Denver Intl

tis 3/31

9:35 am-6:00 pm

2 stops23h 25m

Sofia

tors 5/7

6:30 am-7:00 pm

2 stops21h 30m

$599

DenverSofia

DEN - SOF

DENSOF

Denver Intl

tis 3/31

8:25 pm-8:15 pm

1 stop14h 50m

Sofia

tis 4/14

9:35 am-6:25 pm

1 stop17h 50m

$602

DenverSofia

DEN - SOF

DENSOF

Denver Intl

tis 3/31

9:35 am-6:00 pm

2 stops23h 25m

Sofia

tis 5/5

6:10 am-6:13 pm

2 stops21h 03m

$603

DenverSofia

DEN - SOF

DENSOF

Denver Intl

tors 4/9

8:25 pm-8:15 pm

1 stop14h 50m

Sofia

tors 4/16

9:35 am-6:25 pm

1 stop17h 50m

$609

DenverSofia

DEN - SOF

DENSOF

Denver Intl

mån 3/30

3:45 pm-11:00 pm

2 stops22h 15m

Sofia

ons 5/6

6:20 am-1:35 pm

1 stop16h 15m

$615

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 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 April. Flight prices, which tend to average around $591, 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 November instead. Flights to Sofia in November, while not as cheap as those in April, still average around $596.

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 $807 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 $652 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

17h 25m

Direct flights

None
The fastest flight from Denver to Sofia takes 17h 25m
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 17h 25m 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
4,238 reviews
Search Turkish Airlines flights
LufthansaPriceFrom $616Free CancellationRating
6.8
7,815 reviews
Search Lufthansa flights
United AirlinesPriceFrom $686Free CancellationRating
7.4
9,352 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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1 adult
sön 3/29
sön 4/5
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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