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

Istanbul (IST) has the shortest average layover time for this route: 2h 48m.

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

Istanbul (IST) was the most common stop: 67% 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 $766.

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 05m.

What airlines fly to Denver?

Lufthansa, United Airlines and Turkish 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 54% 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.

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 October 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 in 2025/26

Q: What is the typical price of a round-trip flight between Sofia and Denver?

Prices are currently low for flights on this route. Typical prices usually range from $840 to $972. The lowest price recently found on this route was $835.

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Find the cheapest flights from Sofia to Denver

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:00 am - 2:40 pmSOF-DEN

16h 40m1 stop

8:20 pm - 6:20 pmDEN-SOF

13h 00m1 stop

$835Lufthansa

Find Deal

Thu, Oct 30 - Wed, Nov 5

6:00 am - 5:00 pmSOF-DEN

19h 00m1 stop

8:20 pm - 6:20 pmDEN-SOF

13h 00m1 stop

$836United Airlines

Find Deal

Thu, Oct 30 - Wed, Nov 5

6:25 am - 5:00 pmSOF-DEN

18h 35m1 stop

8:45 am - 6:15 pmDEN-SOF

25h 30m2 stops

$837Multiple Airlines

Find Deal

Sat, Mar 14 - Fri, Mar 27

6:00 am - 5:00 pmSOF-DEN

19h 00m1 stop

11:15 am - 1:50 pmDEN-SOF

17h 35m2 stops

$839Multiple Airlines

Find Deal

Thu, Oct 30 - Wed, Nov 5

6:25 am - 8:50 amSOF-DEN

34h 25m2 stops

8:45 am - 6:15 pmDEN-SOF

25h 30m2 stops

$841Air Canada

Find Deal

Sat, Mar 14 - Fri, Mar 27

6:00 am - 4:30 pmSOF-DEN

18h 30m2 stops

10:20 am - 1:50 pmDEN-SOF

18h 30m2 stops

$852United Airlines

Find Deal

Thu, Oct 30 - Wed, Nov 5

6:25 am - 10:06 pmSOF-DEN

24h 41m2 stops

5:30 pm - 1:35 pmDEN-SOF

35h 05m2 stops

$853United Airlines

Find Deal

Sat, Nov 15 - Sat, Nov 22

6:00 am - 5:45 pmSOF-DEN

19h 45m2 stops

9:35 am - 1:50 pmDEN-SOF

19h 15m2 stops

$854United Airlines

Find Deal

Thu, Oct 30 - Wed, Nov 5

7:05 pm - 1:40 pmSOF-DEN

27h 35m1 stop

3:55 pm - 6:15 pmDEN-SOF

17h 20m1 stop

$1,053Lufthansa

Find Deal

Sat, Nov 15 - Sat, Nov 22

12:05 pm - 3:30 pmSOF-DEN

36h 25m1 stop

6:35 pm - 1:30 pmDEN-SOF

33h 55m1 stop

$1,063British Airways

Find Deal

Sat, Dec 20 - Wed, Apr 1

United Airlines flights from Sofia to Denver

Our best United Airlines deals on Sofia to Denver flight tickets

United Airlines

Oct 30

SOF6:00 amSofia

19h 00m

1 stop

DEN5:00 pmDenver Intl

Nov 5

DEN8:20 pmDenver Intl

13h 00m

1 stop

SOF6:20 pmSofia

$836

Find similar

United Airlines

Oct 30

SOF6:00 amSofia

18h 30m

2 stops

DEN4:30 pmDenver Intl

Nov 5

DEN10:20 amDenver Intl

18h 30m

2 stops

SOF1:50 pmSofia

$852

Find similar

United Airlines

Nov 15

SOF6:25 amSofia

24h 41m

2 stops

DEN10:06 pmDenver Intl

Nov 22

DEN5:30 pmDenver Intl

35h 05m

2 stops

SOF1:35 pmSofia

$853

Find similar

Lufthansa flights from Sofia to Denver

Our best Lufthansa deals on Sofia to Denver flight tickets

Lufthansa

Oct 30

SOF6:00 amSofia

16h 40m

1 stop

DEN2:40 pmDenver Intl

Nov 5

DEN8:20 pmDenver Intl

13h 00m

1 stop

SOF6:20 pmSofia

$835

Find similar

Lufthansa

Nov 15

SOF7:05 pmSofia

27h 35m

1 stop

DEN1:40 pmDenver Intl

Nov 22

DEN3:55 pmDenver Intl

17h 20m

1 stop

SOF6:15 pmSofia

$1,053

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Thu 10/30

6:00 am-2:40 pm

1 stop16h 40m

Denver Intl

Wed 11/5

8:20 pm-6:20 pm

1 stop13h 00m

$835

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Thu 10/30

6:00 am-5:00 pm

1 stop19h 00m

Denver Intl

Wed 11/5

8:20 pm-6:20 pm

1 stop13h 00m

$836

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Sat 3/14

6:25 am-5:00 pm

1 stop18h 35m

Denver Intl

Fri 3/27

8:45 am-6:15 pm

2 stops25h 30m

$837

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Thu 10/30

6:00 am-5:00 pm

1 stop19h 00m

Denver Intl

Wed 11/5

11:15 am-1:50 pm

2 stops17h 35m

$839

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Sat 3/14

6:25 am-8:50 am

2 stops34h 25m

Denver Intl

Fri 3/27

8:45 am-6:15 pm

2 stops25h 30m

$841

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Thu 10/30

6:00 am-4:30 pm

2 stops18h 30m

Denver Intl

Wed 11/5

10:20 am-1:50 pm

2 stops18h 30m

$852

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Sat 11/15

6:25 am-10:06 pm

2 stops24h 41m

Denver Intl

Sat 11/22

5:30 pm-1:35 pm

2 stops35h 05m

$853

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Thu 10/30

6:00 am-5:45 pm

2 stops19h 45m

Denver Intl

Wed 11/5

9:35 am-1:50 pm

2 stops19h 15m

$854

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Sat 11/15

7:05 pm-1:40 pm

1 stop27h 35m

Denver Intl

Sat 11/22

3:55 pm-6:15 pm

1 stop17h 20m

$1,053

SofiaDenver

SOF - DEN

SOFDEN

Sofia

Sat 12/20

12:05 pm-3:30 pm

1 stop36h 25m

Denver Intl

Wed 4/1

6:35 pm-1:30 pm

1 stop33h 55m

$1,063

Flights are sorted by cheapest round-trip flights first.

Sorted 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 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 February. Flight prices, which tend to average around $745, are often lower during this time because this is during the off-season. If you don’t want to visit Denver in February, then you should wait until March to fly from Sofia, when ticket prices are also cheap, with an average price of $757.

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

Direct flights	None

There are no direct flights from Sofia to Denver. There are no popular flight routes from Sofia to Denver.

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 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?
As of October 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 54% of the total bookings. Other popular airlines include United Airlines with 24% and Turkish Airlines with 23%.

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 $704	Free Cancellation	Rating 7.3 4,010 reviews	Search Turkish Airlines flights
United Airlines	PriceFrom $729	Free Cancellation	Rating 7.4 8,982 reviews	Search United Airlines flights
Lufthansa	PriceFrom $745	Free Cancellation	Rating 6.8 7,497 reviews	Search Lufthansa flights

Breckenridge

Estes Park

Black Hawk

Aurora

Fort Collins

Keystone

Cripple Creek

Manitou Springs

Boulder

Longmont

Lakewood

Greeley

Thornton

Westminster

Winter Park

Copper Mountain

Silverthorne

Frisco

Grand Lake

Central City

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.