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Cheap flights from Denver to Trieste from $358

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 8/12. 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
1 adult, Economy, 0 bags

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 - 10:15 pm
DEN
-
TRS
20h 35m
1 stop
Lufthansa Logo
6:10 am - 11:54 pm
TRS
-
DEN
25h 44m
2 stops
$1,019Lufthansa
Sun, Aug 30 - Fri, Sep 11
Lufthansa Logo
5:40 pm - 10:15 pm
DEN
-
TRS
20h 35m
1 stop
Lufthansa Logo
6:15 am - 3:40 pm
TRS
-
DEN
17h 25m
1 stop
$1,025Lufthansa
Sun, Aug 30 - Thu, Sep 10
Lufthansa Logo
4:40 pm - 10:25 pm
DEN
-
TRS
21h 45m
2 stops
Lufthansa Logo
6:15 am - 3:40 pm
TRS
-
DEN
17h 25m
1 stop
$1,030Lufthansa
Mon, Aug 31 - Thu, Sep 10
Lufthansa Logo
5:40 pm - 10:15 pm
DEN
-
TRS
20h 35m
1 stop
Lufthansa Logo
6:15 am - 12:30 am
TRS
-
DEN
26h 15m
2 stops
$1,035Lufthansa
Sun, Aug 30 - Thu, Sep 10
Lufthansa Logo
10:20 am - 1:55 pm
DEN
-
TRS
19h 35m
2 stops
Lufthansa Logo
6:10 am - 4:24 pm
TRS
-
DEN
18h 14m
2 stops
$1,040Lufthansa
Mon, Aug 31 - Fri, Sep 11
Lufthansa Logo
5:40 pm - 10:15 pm
DEN
-
TRS
20h 35m
1 stop
Lufthansa Logo
2:50 pm - 4:24 pm
TRS
-
DEN
33h 34m
2 stops
$1,055Lufthansa
Sun, Aug 30 - Mon, Sep 14
Lufthansa Logo
4:15 pm - 10:15 pm
DEN
-
TRS
22h 00m
2 stops
Lufthansa Logo
6:10 am - 4:24 pm
TRS
-
DEN
18h 14m
2 stops
$1,056Lufthansa
Sun, Aug 30 - Fri, Sep 11
Lufthansa Logo
5:40 pm - 10:15 pm
DEN
-
TRS
20h 35m
1 stop
Lufthansa Logo
6:15 am - 7:30 pm
TRS
-
DEN
21h 15m
2 stops
$1,057Lufthansa
Sun, Aug 30 - Sat, Sep 12
Lufthansa Logo
10:20 am - 1:55 pm
DEN
-
TRS
19h 35m
2 stops
Lufthansa Logo
2:50 pm - 4:24 pm
TRS
-
DEN
33h 34m
2 stops
$1,060Lufthansa
Mon, Aug 31 - Mon, Sep 14
Multiple Airlines Logo
9:40 am - 10:15 pm
DEN
-
TRS
28h 35m
2 stops
Multiple Airlines Logo
6:15 am - 5:56 pm
TRS
-
DEN
19h 41m
2 stops
$1,062Multiple Airlines
Sun, Aug 30 - Sat, Sep 12

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Lufthansa flights from Denver to Trieste

Our best Lufthansa deals on Denver to Trieste flight tickets
Lufthansa
Aug 30
DEN5:40 pmDenver Intl
20h 35m
1 stop
TRS10:15 pmTrieste Ronchi dei Legionari
Sep 11
TRS6:10 amTrieste Ronchi dei Legionari
25h 44m
2 stops
DEN11:54 pmDenver Intl
$1,019
Lufthansa
Aug 30
DEN5:40 pmDenver Intl
20h 35m
1 stop
TRS10:15 pmTrieste Ronchi dei Legionari
Sep 10
TRS6:15 amTrieste Ronchi dei Legionari
17h 25m
1 stop
DEN3:40 pmDenver Intl
$1,025
Lufthansa
Aug 31
DEN4:40 pmDenver Intl
21h 45m
2 stops
TRS10:25 pmTrieste Ronchi dei Legionari
Sep 10
TRS6:15 amTrieste Ronchi dei Legionari
17h 25m
1 stop
DEN3:40 pmDenver Intl
$1,030

ITA Airways flights from Denver to Trieste

Our best ITA Airways deals on Denver to Trieste flight tickets
ITA Airways
Aug 28
DEN6:00 amDenver Intl
20h 25m
2 stops
TRS10:25 amTrieste Ronchi dei Legionari
Sep 14
TRS6:35 amTrieste Ronchi dei Legionari
22h 41m
2 stops
DEN9:16 pmDenver Intl
$1,319
ITA Airways
Aug 29
DEN8:00 amDenver Intl
18h 25m
2 stops
TRS10:25 amTrieste Ronchi dei Legionari
Sep 13
TRS7:15 pmTrieste Ronchi dei Legionari
34h 01m
2 stops
DEN9:16 pmDenver Intl
$1,357

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 July 19, 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

Sun 8/30

5:40 pm-10:15 pm

1 stop20h 35m

Trieste Ronchi dei Legionari

Fri 9/11

6:10 am-11:54 pm

2 stops25h 44m

$1,019

DenverTrieste

DEN - TRS

DENTRS

Denver Intl

Sun 8/30

5:40 pm-10:15 pm

1 stop20h 35m

Trieste Ronchi dei Legionari

Thu 9/10

6:15 am-3:40 pm

1 stop17h 25m

$1,025

DenverTrieste

DEN - TRS

DENTRS

Denver Intl

Mon 8/31

4:40 pm-10:25 pm

2 stops21h 45m

Trieste Ronchi dei Legionari

Thu 9/10

6:15 am-3:40 pm

1 stop17h 25m

$1,030

DenverTrieste

DEN - TRS

DENTRS

Denver Intl

Sun 8/30

5:40 pm-10:15 pm

1 stop20h 35m

Trieste Ronchi dei Legionari

Thu 9/10

6:15 am-12:30 am

2 stops26h 15m

$1,035
Quickest round-trip

DenverTrieste

DEN - TRS

DENTRS

Denver Intl

Mon 8/31

10:20 am-1:55 pm

2 stops19h 35m

Trieste Ronchi dei Legionari

Fri 9/11

6:10 am-4:24 pm

2 stops18h 14m

$1,040

DenverTrieste

DEN - TRS

DENTRS

Denver Intl

Sun 8/30

5:40 pm-10:15 pm

1 stop20h 35m

Trieste Ronchi dei Legionari

Mon 9/14

2:50 pm-4:24 pm

2 stops33h 34m

$1,055

DenverTrieste

DEN - TRS

DENTRS

Denver Intl

Sun 8/30

4:15 pm-10:15 pm

2 stops22h 00m

Trieste Ronchi dei Legionari

Fri 9/11

6:10 am-4:24 pm

2 stops18h 14m

$1,056

DenverTrieste

DEN - TRS

DENTRS

Denver Intl

Sun 8/30

5:40 pm-10:15 pm

1 stop20h 35m

Trieste Ronchi dei Legionari

Sat 9/12

6:15 am-7:30 pm

2 stops21h 15m

$1,057

DenverTrieste

DEN - TRS

DENTRS

Denver Intl

Mon 8/31

10:20 am-1:55 pm

2 stops19h 35m

Trieste Ronchi dei Legionari

Mon 9/14

2:50 pm-4:24 pm

2 stops33h 34m

$1,060

DenverTrieste

DEN - TRS

DENTRS

Denver Intl

Sun 8/30

9:40 am-10:15 pm

2 stops28h 35m

Trieste Ronchi dei Legionari

Sat 9/12

6:15 am-5:56 pm

2 stops19h 41m

$1,062

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?

United Airlines 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 46% 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

16h 05m

Direct flights

None
The fastest flight from Denver to Trieste takes 16h 05m
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 16h 05m.

  • 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.

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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