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Cheap flights from Sofia to Denver from $556

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Sofia to Denver departing on 9/22. 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 Sofia to Denver

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
6:20 am - 12:30 am
SOF
-
DEN
27h 10m
2 stops
United Airlines Logo
4:15 pm - 11:15 pm
DEN
-
SOF
22h 00m
1 stop
$980United Airlines
Sun, Jun 14 - Sun, Aug 30
United Airlines Logo
6:20 am - 6:20 pm
SOF
-
DEN
21h 00m
2 stops
United Airlines Logo
5:50 pm - 11:40 am
DEN
-
SOF
32h 50m
2 stops
$981United Airlines
Sat, May 30 - Mon, Jun 8
United Airlines Logo
6:20 am - 7:45 pm
SOF
-
DEN
22h 25m
2 stops
United Airlines Logo
10:20 am - 12:10 pm
DEN
-
SOF
16h 50m
2 stops
$985United Airlines
Sun, Jun 14 - Sun, Aug 30
Lufthansa Logo
11:50 am - 12:30 am
SOF
-
DEN
21h 40m
2 stops
Lufthansa Logo
7:05 pm - 10:50 pm
DEN
-
SOF
18h 45m
2 stops
$992Lufthansa
Sat, Jun 6 - Sat, Jun 13
Lufthansa Logo
6:10 am - 6:50 pm
SOF
-
DEN
21h 40m
1 stop
Lufthansa Logo
7:05 pm - 10:50 pm
DEN
-
SOF
18h 45m
2 stops
$1,024Lufthansa
Sat, Jun 6 - Sat, Jun 13
United Airlines Logo
6:20 am - 6:20 pm
SOF
-
DEN
21h 00m
2 stops
United Airlines Logo
8:25 pm - 11:15 pm
DEN
-
SOF
17h 50m
1 stop
$1,042United Airlines
Sat, May 30 - Mon, Jun 8
United Airlines Logo
6:10 am - 2:20 pm
SOF
-
DEN
17h 10m
1 stop
United Airlines Logo
8:25 pm - 11:15 pm
DEN
-
SOF
17h 50m
1 stop
$1,047United Airlines
Sun, Jun 14 - Sun, Aug 30
Lufthansa Logo
6:10 am - 2:20 pm
SOF
-
DEN
17h 10m
1 stop
Lufthansa Logo
8:25 pm - 11:15 pm
DEN
-
SOF
17h 50m
1 stop
$1,056Lufthansa
Sat, May 30 - Mon, Jun 8
Lufthansa Logo
6:10 am - 2:20 pm
SOF
-
DEN
17h 10m
1 stop
Lufthansa Logo
5:40 pm - 11:00 am
DEN
-
SOF
32h 20m
1 stop
$1,069Lufthansa
Sat, Jun 6 - Sat, Jun 13
Multiple Airlines Logo
6:10 am - 2:20 pm
SOF
-
DEN
17h 10m
1 stop
Multiple Airlines Logo
6:10 pm - 11:00 am
DEN
-
SOF
31h 50m
2 stops
$1,073Multiple Airlines
Sat, May 30 - Mon, Jun 8

United Airlines flights from Sofia to Denver

Our best United Airlines deals on Sofia to Denver flight tickets
United Airlines
Jun 14
SOF6:20 amSofia
27h 10m
2 stops
DEN12:30 amDenver Intl
Aug 30
DEN4:15 pmDenver Intl
22h 00m
1 stop
SOF11:15 pmSofia
$980
United Airlines
May 30
SOF6:20 amSofia
21h 00m
2 stops
DEN6:20 pmDenver Intl
Jun 8
DEN5:50 pmDenver Intl
32h 50m
2 stops
SOF11:40 amSofia
$981
United Airlines
Jun 14
SOF6:20 amSofia
22h 25m
2 stops
DEN7:45 pmDenver Intl
Aug 30
DEN10:20 amDenver Intl
16h 50m
2 stops
SOF12:10 pmSofia
$985

Lufthansa flights from Sofia to Denver

Our best Lufthansa deals on Sofia to Denver flight tickets
Lufthansa
Jun 6
SOF11:50 amSofia
21h 40m
2 stops
DEN12:30 amDenver Intl
Jun 13
DEN7:05 pmDenver Intl
18h 45m
2 stops
SOF10:50 pmSofia
$992
Lufthansa
Jun 6
SOF6:10 amSofia
21h 40m
1 stop
DEN6:50 pmDenver Intl
Jun 13
DEN7:05 pmDenver Intl
18h 45m
2 stops
SOF10:50 pmSofia
$1,024
Lufthansa
May 30
SOF6:10 amSofia
17h 10m
1 stop
DEN2:20 pmDenver Intl
Jun 8
DEN8:25 pmDenver Intl
17h 50m
1 stop
SOF11:15 pmSofia
$1,056

momondo Fare Finder

 
Customize your flight search to find flights from Sofia to Denver 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 April 27, 2026.
Use the filters below to find and compare flights from Sofia to Denver that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Sun 6/14

6:20 am-12:30 am

2 stops27h 10m

Denver Intl

Sun 8/30

4:15 pm-11:15 pm

1 stop22h 00m

$980

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Sat 5/30

6:20 am-6:20 pm

2 stops21h 00m

Denver Intl

Mon 6/8

5:50 pm-11:40 am

2 stops32h 50m

$981

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Sun 6/14

6:20 am-7:45 pm

2 stops22h 25m

Denver Intl

Sun 8/30

10:20 am-12:10 pm

2 stops16h 50m

$985

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Sat 6/6

11:50 am-12:30 am

2 stops21h 40m

Denver Intl

Sat 6/13

7:05 pm-10:50 pm

2 stops18h 45m

$992

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Sat 6/6

6:10 am-6:50 pm

1 stop21h 40m

Denver Intl

Sat 6/13

7:05 pm-10:50 pm

2 stops18h 45m

$1,024

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Sat 5/30

6:20 am-6:20 pm

2 stops21h 00m

Denver Intl

Mon 6/8

8:25 pm-11:15 pm

1 stop17h 50m

$1,042
Quickest round-trip

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Sun 6/14

6:10 am-2:20 pm

1 stop17h 10m

Denver Intl

Sun 8/30

8:25 pm-11:15 pm

1 stop17h 50m

$1,047

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Sat 5/30

6:10 am-2:20 pm

1 stop17h 10m

Denver Intl

Mon 6/8

8:25 pm-11:15 pm

1 stop17h 50m

$1,056

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Sat 6/6

6:10 am-2:20 pm

1 stop17h 10m

Denver Intl

Sat 6/13

5:40 pm-11:00 am

1 stop32h 20m

$1,069

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Sat 5/30

6:10 am-2:20 pm

1 stop17h 10m

Denver Intl

Mon 6/8

6:10 pm-11:00 am

2 stops31h 50m

$1,073

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Denver from

How to get the cheapest flight ticket from Sofia to Denver

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 typical price of a round-trip flight between Sofia and Denver?

What is the cheapest month to fly to Denver?

The cheapest month to fly to Denver from Sofia is in January. Flight prices, which tend to average around $0, are often lower during this time because this is during the off-season. If you don’t want to visit Denver in January, then you should wait until September to fly from Sofia, when ticket prices are also cheap, with an average price of $783.

Can stopping save me money on Sofia to Denver flights?

You could potentially save up to 25% on your flight if you consider stops on a Sofia to Denver flight.

When to book flights from Sofia to Denver

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

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

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

Fastest flight time

21h 40m

Direct flights

None
The fastest flight from Sofia to Denver takes 21h 40m
There are no direct flights from Sofia to Denver. There are no popular flight routes from Sofia to Denver.
Search flight deals

Frequently asked questions about flying from Sofia to Denver

  • How far is Sofia to Denver Intl by plane?

    The straight-line distance from Sofia to Denver Intl is 5884.6 mi. Typically, this will take 21h 40m by plane in normal conditions.

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

    Prices for flights from Sofia Airport to Denver Intl Airport refresh daily.

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

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Sofia Airport to Denver Intl Airport.

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

    The required travel and health documents for your Denver Intl 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 Denver Intl 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 Sofia to Denver?

Best airlines flying from Sofia to Denver

Compare and see reviews for airlines that fly from Sofia to Denver with momondo
Airline
Rating
Free Cancellation
Price
Turkish AirlinesPriceFrom $704Free CancellationRating
7.4
4,337 reviews
Search Turkish Airlines flights
United AirlinesPriceFrom $785Free CancellationRating
7.4
9,668 reviews
Search United Airlines flights
LufthansaPriceFrom $802Free CancellationRating
6.8
7,956 reviews
Search Lufthansa flights

Traveling to a place near Denver?

Book flights to Denver if you plan to visit one of these locations
Breckenridge
Estes Park
Black Hawk
Aurora
Fort Collins
Manitou Springs
Longmont
Boulder
Greeley
Keystone
Lakewood
Cripple Creek
Westminster
Thornton
Frisco
Centennial
Grand Lake
Winter Park
Englewood
Littleton

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Sofia to Denver. momondo saves you time and could save you money on your trip.

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

Yes. momondo allows you to filter the results for Sofia to Denver flights to just show those with flexible booking policies.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Sofia to Denver.

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

Yes momondo offers price alerts on flights to Denver from Sofia. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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