Which layover airport has the shortest connection time from Sofia to Denver?

Istanbul (IST) has the shortest average layover time for this route: 2h 54m.

What airlines fly to Denver?

Lufthansa, Turkish Airlines and United Airlines are the top three most popular airlines that fly to Denver from Sofia according to our data. Lufthansa is the first choice among our users, with 42% of people opting to fly with this airline when traveling to Denver. Keep in mind that there are 3 different airlines that fly to Denver on a routine basis, so you have a few additional options to choose from.

What is the cheapest airline that flies from Sofia to Denver Intl?

Lufthansa and United Airlines are the most popular carriers operating from Sofia to Denver Intl

Which layover airport has the shortest travel time from Sofia to Denver?

Flights connecting via Istanbul (IST) have the shortest average one-way travel time: 17h 14m.

Which airport is the most popular layover for flights between Sofia and Denver?

Istanbul (IST) was the most common stop: 69% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport offers the lowest fares from Sofia to Denver?

Flights via Munich (MUC) offer the lowest average round-trip price of $778.

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?

As of August 2025, there are 3 operators available to choose from 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.

$638 Cheap Flights from Sofia to Denver (SOF-DEN) in 2025

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

Round-trip

One-way

Cheap round-trip flights

9:25 am - 5:55 pmSOF-DEN

17h 30m1 stop

7:50 pm - 2:45 pmDEN-SOF

33h 55m1 stop

$703Turkish Airlines

Find Deal

Fri, Aug 29 - Thu, Sep 4

9:25 am - 5:55 pmSOF-DEN

17h 30m1 stop

7:50 pm - 8:35 amDEN-SOF

27h 45m1 stop

$704Turkish Airlines

Find Deal

Sun, Sep 7 - Sun, Sep 21

6:00 am - 12:09 pmSOF-DEN

39h 09m2 stops

8:28 pm - 11:00 pmDEN-SOF

41h 32m2 stops

$771United Airlines

Find Deal

Sun, Sep 7 - Sun, Sep 21

6:00 am - 1:45 pmSOF-DEN

16h 45m1 stop

8:20 pm - 11:00 pmDEN-SOF

17h 40m1 stop

$776Lufthansa

Find Deal

Sun, Sep 21 - Sun, Sep 28

7:00 am - 3:30 pmSOF-DEN

17h 30m1 stop

10:50 am - 2:00 pmDEN-SOF

18h 10m2 stops

$780

Find Deal

Sun, Sep 21 - Sun, Sep 28

6:00 am - 11:30 pmSOF-DEN

26h 30m2 stops

1:26 pm - 5:50 pmDEN-SOF

19h 24m2 stops

$805United Airlines

Find Deal

Sun, Sep 21 - Sun, Sep 28

6:35 pm - 1:45 pmSOF-DEN

28h 10m2 stops

3:50 pm - 5:50 pmDEN-SOF

17h 00m1 stop

$831Lufthansa

Find Deal

Fri, Aug 29 - Thu, Sep 4

6:35 pm - 1:45 pmSOF-DEN

28h 10m2 stops

3:40 pm - 5:50 pmDEN-SOF

17h 10m2 stops

$836Lufthansa

Find Deal

Fri, Aug 29 - Thu, Sep 4

6:40 pm - 4:20 pmSOF-DEN

30h 40m3 stops

5:59 pm - 11:00 pmDEN-SOF

20h 01m2 stops

$1,079

Find Deal

Sun, Sep 21 - Sun, Sep 28

6:40 pm - 6:55 pmSOF-DEN

33h 15m3 stops

4:40 pm - 10:05 amDEN-SOF

32h 25m3 stops

$1,240

Find Deal

Fri, Aug 29 - Thu, Sep 4

Turkish Airlines flights from Sofia to Denver

Our best Turkish Airlines deals on Sofia to Denver flight tickets

Turkish Airlines

Aug 29

SOF9:25 amSofia

17h 30m

1 stop

DEN5:55 pmDenver Intl

Sep 4

DEN7:50 pmDenver Intl

33h 55m

1 stop

SOF2:45 pmSofia

$703

Find similar

Turkish Airlines

Sep 7

SOF9:25 amSofia

17h 30m

1 stop

DEN5:55 pmDenver Intl

Sep 21

DEN7:50 pmDenver Intl

27h 45m

1 stop

SOF8:35 amSofia

$704

Find similar

Lufthansa flights from Sofia to Denver

Our best Lufthansa deals on Sofia to Denver flight tickets

Lufthansa

Sep 21

SOF6:00 amSofia

16h 45m

1 stop

DEN1:45 pmDenver Intl

Sep 28

DEN8:20 pmDenver Intl

17h 40m

1 stop

SOF11:00 pmSofia

$776

Find similar

Lufthansa

Aug 29

SOF6:35 pmSofia

28h 10m

2 stops

DEN1:45 pmDenver Intl

Sep 4

DEN3:50 pmDenver Intl

17h 00m

1 stop

SOF5:50 pmSofia

$831

Find similar

Lufthansa

Aug 29

SOF6:35 pmSofia

28h 10m

2 stops

DEN1:45 pmDenver Intl

Sep 4

DEN3:40 pmDenver Intl

17h 10m

2 stops

SOF5:50 pmSofia

$836

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Fri 8/29

9:25 am-5:55 pm

1 stop17h 30m

Denver Intl

Thu 9/4

7:50 pm-2:45 pm

1 stop33h 55m

$703

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Sun 9/7

9:25 am-5:55 pm

1 stop17h 30m

Denver Intl

Sun 9/21

7:50 pm-8:35 am

1 stop27h 45m

$704

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Sun 9/7

6:00 am-12:09 pm

2 stops39h 09m

Denver Intl

Sun 9/21

8:28 pm-11:00 pm

2 stops41h 32m

$771

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Sun 9/21

6:00 am-1:45 pm

1 stop16h 45m

Denver Intl

Sun 9/28

8:20 pm-11:00 pm

1 stop17h 40m

$776

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Sun 9/21

7:00 am-3:30 pm

1 stop17h 30m

Denver Intl

Sun 9/28

10:50 am-2:00 pm

2 stops18h 10m

$780

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Sun 9/21

6:00 am-11:30 pm

2 stops26h 30m

Denver Intl

Sun 9/28

1:26 pm-5:50 pm

2 stops19h 24m

$805

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Fri 8/29

6:35 pm-1:45 pm

2 stops28h 10m

Denver Intl

Thu 9/4

3:50 pm-5:50 pm

1 stop17h 00m

$831

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Fri 8/29

6:35 pm-1:45 pm

2 stops28h 10m

Denver Intl

Thu 9/4

3:40 pm-5:50 pm

2 stops17h 10m

$836

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Sun 9/21

6:40 pm-4:20 pm

3 stops30h 40m

Denver Intl

Sun 9/28

5:59 pm-11:00 pm

2 stops20h 01m

$1,079

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Fri 8/29

6:40 pm-6:55 pm

3 stops33h 15m

Denver Intl

Thu 9/4

4:40 pm-10:05 am

3 stops32h 25m

$1,240

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 resultsSorted by cheapest first

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

Prices

Airlines

Layovers

What is the cheapest month to fly to Denver?

The cheapest month to fly to Denver from Sofia is in November. Flight prices, which tend to average around $652, are often lower during this time because this is during the off-season. If you don’t want to visit Denver in November, then you should wait until April to fly from Sofia, when ticket prices are also cheap, with an average price of $709.

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

The cheapest day to depart on your flight to Denver is on a Friday when prices can be found for as low as $778. This is often the case because there is less demand to fly during this day of the week. The most expensive day to fly to Denver is Thursday, with ticket prices averaging around $972.

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

The cheapest time of day to fly to Denver is in the evening when flights can be purchased for as low as $691. Flights in the morning are often more expensive with an average ticket price of $816.

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

Best Price Found	$852
Fastest flight time	14h 50m
Direct flights	None
Airports in Denver	1 airport

The best one-way flight to Denver from Sofia in the past 72 hours is $852. The best round-trip flight deal from Sofia to Denver found on momondo in the last 72 hours is $703.

The fastest flight from Sofia to Denver takes 14h 50m

There are no direct flights from Sofia to Denver. Popular non-direct route for this connection is Sofia Airport - Denver Intl Airport.

There is 1 airport near Denver: Denver Intl (DEN)

Search flight deals

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 16h 45m 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?
As of August 2025, there are 3 operators available to choose from 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?
Based on momondo bookings for flights between Sofia and Denver, the leading airline is Lufthansa, making up 42% of the total bookings. Other popular airlines include Turkish Airlines with 32% and United Airlines with 26%.

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 Airlines	PriceFrom $639	Free Cancellation	Rating 7.3 3,932 reviews	Search Turkish Airlines flights
United Airlines	PriceFrom $729	Free Cancellation	Rating 7.4 8,917 reviews	Search United Airlines flights
Lufthansa	PriceFrom $737	Free Cancellation	Rating 6.8 7,296 reviews	Search Lufthansa flights

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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.