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Cheap flights from Denver to Trieste from $395

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 Trieste departing on 9/2. 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 Trieste

Cheap round-trip flights

Enter your travel dates to find the best prices.
Lufthansa Logo
5:40 pm - 10:25 pm
DEN
-
TRS
20h 45m
1 stop
Lufthansa Logo
6:10 am - 12:30 am
TRS
-
DEN
26h 20m
2 stops
$1,044Lufthansa
Mon, Jul 6 - Wed, Jul 29
KLM Logo
12:12 pm - 6:30 pm
DEN
-
TRS
22h 18m
2 stops
KLM Logo
6:35 am - 10:45 pm
TRS
-
DEN
24h 10m
2 stops
$1,052KLM
Mon, Jul 6 - Wed, Jul 29
Lufthansa Logo
5:40 pm - 2:00 pm
DEN
-
TRS
12h 20m
1 stop
Lufthansa Logo
6:15 am - 4:30 pm
TRS
-
DEN
18h 15m
2 stops
$1,062Lufthansa
Sat, Jul 11 - Sat, Jul 18
Lufthansa Logo
5:40 pm - 2:00 pm
DEN
-
TRS
12h 20m
1 stop
Lufthansa Logo
6:15 am - 3:40 pm
TRS
-
DEN
17h 25m
1 stop
$1,147Lufthansa
Sat, Jul 11 - Sat, Jul 18
Lufthansa Logo
5:40 pm - 10:25 pm
DEN
-
TRS
20h 45m
1 stop
Lufthansa Logo
6:10 am - 3:40 pm
TRS
-
DEN
17h 30m
1 stop
$1,247Lufthansa
Mon, Jul 6 - Wed, Jul 29
Lufthansa Logo
8:25 pm - 10:55 pm
DEN
-
TRS
18h 30m
2 stops
Lufthansa Logo
6:15 am - 4:30 pm
TRS
-
DEN
18h 15m
2 stops
$1,282Lufthansa
Sat, Jul 11 - Sat, Jul 18
Multiple Airlines Logo
4:15 pm - 10:15 pm
DEN
-
TRS
22h 00m
2 stops
Multiple Airlines Logo
6:20 am - 10:59 pm
TRS
-
DEN
24h 39m
2 stops
$1,420Multiple Airlines
Sun, Aug 9 - Tue, Aug 18
Multiple Airlines Logo
4:40 pm - 10:55 pm
DEN
-
TRS
22h 15m
3 stops
Multiple Airlines Logo
3:15 pm - 6:25 pm
TRS
-
DEN
35h 10m
2 stops
$1,486Multiple Airlines
Mon, Jul 6 - Wed, Jul 29
Multiple Airlines Logo
5:40 pm - 11:20 pm
DEN
-
TRS
21h 40m
3 stops
Multiple Airlines Logo
8:30 am - 11:20 am
TRS
-
DEN
34h 50m
2 stops
$1,499Multiple Airlines
Sat, Jul 11 - Sat, Jul 18
Multiple Airlines Logo
12:15 pm - 10:15 pm
DEN
-
TRS
26h 00m
2 stops
Multiple Airlines Logo
6:10 am - 10:45 pm
TRS
-
DEN
24h 35m
2 stops
$1,540Multiple Airlines
Sat, Jun 20 - Fri, Jun 26

Lufthansa flights from Denver to Trieste

Our best Lufthansa deals on Denver to Trieste flight tickets
Lufthansa
Jul 6
DEN5:40 pmDenver Intl
20h 45m
1 stop
TRS10:25 pmTrieste Ronchi dei Legionari
Jul 29
TRS6:10 amTrieste Ronchi dei Legionari
26h 20m
2 stops
DEN12:30 amDenver Intl
$1,044
Lufthansa
Jul 11
DEN5:40 pmDenver Intl
12h 20m
1 stop
TRS2:00 pmTrieste Ronchi dei Legionari
Jul 18
TRS6:15 amTrieste Ronchi dei Legionari
18h 15m
2 stops
DEN4:30 pmDenver Intl
$1,062
Lufthansa
Jul 11
DEN5:40 pmDenver Intl
12h 20m
1 stop
TRS2:00 pmTrieste Ronchi dei Legionari
Jul 18
TRS6:15 amTrieste Ronchi dei Legionari
17h 25m
1 stop
DEN3:40 pmDenver Intl
$1,147

momondo Fare Finder

 
Customize your flight search to find flights from Denver to Trieste 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 June 1, 2026.
Use the filters below to find and compare flights from Denver to Trieste that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

DenverTrieste

DEN - TRS

DENTRS

Denver Intl

Mon 7/6

5:40 pm-10:25 pm

1 stop20h 45m

Trieste Ronchi dei Legionari

Wed 7/29

6:10 am-12:30 am

2 stops26h 20m

$1,044

DenverTrieste

DEN - TRS

DENTRS

Denver Intl

Mon 7/6

12:12 pm-6:30 pm

2 stops22h 18m

Trieste Ronchi dei Legionari

Wed 7/29

6:35 am-10:45 pm

2 stops24h 10m

$1,052

DenverTrieste

DEN - TRS

DENTRS

Denver Intl

Sat 7/11

5:40 pm-2:00 pm

1 stop12h 20m

Trieste Ronchi dei Legionari

Sat 7/18

6:15 am-4:30 pm

2 stops18h 15m

$1,062
Quickest round-trip

DenverTrieste

DEN - TRS

DENTRS

Denver Intl

Sat 7/11

5:40 pm-2:00 pm

1 stop12h 20m

Trieste Ronchi dei Legionari

Sat 7/18

6:15 am-3:40 pm

1 stop17h 25m

$1,147

DenverTrieste

DEN - TRS

DENTRS

Denver Intl

Mon 7/6

5:40 pm-10:25 pm

1 stop20h 45m

Trieste Ronchi dei Legionari

Wed 7/29

6:10 am-3:40 pm

1 stop17h 30m

$1,247

DenverTrieste

DEN - TRS

DENTRS

Denver Intl

Sat 7/11

8:25 pm-10:55 pm

2 stops18h 30m

Trieste Ronchi dei Legionari

Sat 7/18

6:15 am-4:30 pm

2 stops18h 15m

$1,282

DenverTrieste

DEN - TRS

DENTRS

Denver Intl

Sun 8/9

4:15 pm-10:15 pm

2 stops22h 00m

Trieste Ronchi dei Legionari

Tue 8/18

6:20 am-10:59 pm

2 stops24h 39m

$1,420

DenverTrieste

DEN - TRS

DENTRS

Denver Intl

Mon 7/6

4:40 pm-10:55 pm

3 stops22h 15m

Trieste Ronchi dei Legionari

Wed 7/29

3:15 pm-6:25 pm

2 stops35h 10m

$1,486

DenverTrieste

DEN - TRS

DENTRS

Denver Intl

Sat 7/11

5:40 pm-11:20 pm

3 stops21h 40m

Trieste Ronchi dei Legionari

Sat 7/18

8:30 am-11:20 am

2 stops34h 50m

$1,499

DenverTrieste

DEN - TRS

DENTRS

Denver Intl

Sat 6/20

12:15 pm-10:15 pm

2 stops26h 00m

Trieste Ronchi dei Legionari

Fri 6/26

6:10 am-10:45 pm

2 stops24h 35m

$1,540

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 Trieste from

How to get the cheapest flight ticket from Denver to Trieste

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 airline that flies from Denver Intl to Trieste Ronchi dei Legionari?

Lufthansa is the most popular carrier operating from Denver Intl to Trieste Ronchi dei Legionari

What airlines fly to Trieste?

United Airlines, Lufthansa and British Airways are the top three most popular airlines that fly to Trieste from Denver according to our data. United Airlines is the first choice among our users, with 47% of people opting to fly with this airline when traveling to Trieste. Keep in mind that there are 5 different airlines that fly to Trieste on a routine basis, so you have a few additional options to choose from.

When to book flights from Denver to Trieste

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

Cheap Denver to Trieste (DEN to TRS) flight deals and tips

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

Fastest flight time

20h 45m

Direct flights

None
The fastest flight from Denver to Trieste takes 20h 45m
There are no direct flights from Denver to Trieste. There are no popular flight routes from Denver to Trieste.
Search flight deals

Frequently asked questions about flying from Denver to Trieste

  • How far is Denver Intl to Trieste Ronchi dei Legionari by plane?

    The distance between Denver Intl and Trieste Ronchi dei Legionari is about 5423.3 mi. By plane, this route typically takes 20h 45m.

  • When did momondo last update prices for flights from Denver Intl Airport to Trieste Ronchi dei Legionari Airport?

    Prices for flights from Denver Intl Airport to Trieste Ronchi dei Legionari Airport are updated daily.

  • How old do you have to be to fly from Denver Intl Airport to Trieste Ronchi dei Legionari 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 Trieste Ronchi dei Legionari Airport.

  • What documentation or ID do you need to fly to Trieste Ronchi dei Legionari Airport?

    The travel and health documents required for your trip to Trieste Ronchi dei Legionari Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Trieste Ronchi dei Legionari Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Traveling to a place near Trieste?

Book flights to Trieste if you plan to visit one of these locations
Udine
Grado

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Trieste from Denver.

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

Yes. momondo enables you to select and highlight flights to Trieste from Denver with this policy.

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

Once you have performed a search for Denver to Trieste flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Yes. momondo can track prices for Denver to Trieste flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

An easier way to manage your Trieste trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
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Fly your favorite airline to Trieste

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