Latest deals
Insights
When to book
FAQs
Price Alerts

Cheap flights from Denver to Trieste from $678

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 7/10. 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

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

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 - 1:55 pm
DEN
-
TRS
12h 15m
1 stop
Lufthansa Logo
6:15 am - 3:40 pm
TRS
-
DEN
17h 25m
1 stop
$973Lufthansa
Fri, Aug 14 - Thu, Aug 20
Lufthansa Logo
6:00 pm - 9:55 pm
DEN
-
TRS
19h 55m
2 stops
Lufthansa Logo
6:15 am - 3:40 pm
TRS
-
DEN
17h 25m
1 stop
$977Lufthansa
Fri, Aug 14 - Thu, Aug 20
Lufthansa Logo
6:00 pm - 9:55 pm
DEN
-
TRS
19h 55m
2 stops
Lufthansa Logo
6:15 am - 1:45 pm
TRS
-
DEN
15h 30m
2 stops
$1,010Lufthansa
Fri, Aug 14 - Thu, Aug 20
Multiple Airlines Logo
12:01 pm - 10:15 pm
DEN
-
TRS
26h 14m
2 stops
Multiple Airlines Logo
6:10 am - 11:17 pm
TRS
-
DEN
25h 07m
2 stops
$1,046Multiple Airlines
Thu, Sep 17 - Wed, Sep 23
Lufthansa Logo
5:40 pm - 10:15 pm
DEN
-
TRS
20h 35m
1 stop
Lufthansa Logo
6:10 am - 3:40 pm
TRS
-
DEN
17h 30m
1 stop
$1,109Lufthansa
Thu, Sep 17 - Wed, Sep 23
Multiple Airlines Logo
5:40 pm - 10:15 pm
DEN
-
TRS
20h 35m
1 stop
Multiple Airlines Logo
6:10 am - 11:08 pm
TRS
-
DEN
24h 58m
2 stops
$1,110Multiple Airlines
Thu, Sep 17 - Wed, Sep 23
Multiple Airlines Logo
4:15 pm - 8:15 pm
DEN
-
TRS
20h 00m
2 stops
Multiple Airlines Logo
3:15 pm - 7:00 pm
TRS
-
DEN
35h 45m
3 stops
$1,268Multiple Airlines
Thu, Sep 17 - Wed, Sep 23
Multiple Airlines Logo
4:40 pm - 10:55 pm
DEN
-
TRS
22h 15m
3 stops
Multiple Airlines Logo
3:15 pm - 7:00 pm
TRS
-
DEN
35h 45m
3 stops
$1,274Multiple Airlines
Thu, Sep 17 - Wed, Sep 23
Lufthansa Logo
5:40 pm - 10:15 pm
DEN
-
TRS
20h 35m
1 stop
Lufthansa Logo
6:10 am - 1:45 pm
TRS
-
DEN
39h 35m
2 stops
$1,291Lufthansa
Tue, Jul 7 - Mon, Jul 27
Icelandair Logo
8:10 pm - 6:30 pm
DEN
-
TRS
38h 20m
2 stops
Icelandair Logo
11:15 am - 12:40 pm
TRS
-
DEN
33h 25m
2 stops
$1,294Icelandair
Tue, Jul 7 - Mon, Jul 27

Lufthansa flights from Denver to Trieste

Our best Lufthansa deals on Denver to Trieste flight tickets
Lufthansa
Aug 14
DEN5:40 pmDenver Intl
12h 15m
1 stop
TRS1:55 pmTrieste Ronchi dei Legionari
Aug 20
TRS6:15 amTrieste Ronchi dei Legionari
17h 25m
1 stop
DEN3:40 pmDenver Intl
$973
Lufthansa
Aug 14
DEN6:00 pmDenver Intl
19h 55m
2 stops
TRS9:55 pmTrieste Ronchi dei Legionari
Aug 20
TRS6:15 amTrieste Ronchi dei Legionari
17h 25m
1 stop
DEN3:40 pmDenver Intl
$977
Lufthansa
Aug 14
DEN6:00 pmDenver Intl
19h 55m
2 stops
TRS9:55 pmTrieste Ronchi dei Legionari
Aug 20
TRS6:15 amTrieste Ronchi dei Legionari
15h 30m
2 stops
DEN1:45 pmDenver Intl
$1,010

United Airlines flights from Denver to Trieste

Our best United Airlines deals on Denver to Trieste flight tickets
United Airlines
Jun 14
DEN9:40 amDenver Intl
40h 45m
2 stops
TRS10:25 amTrieste Ronchi dei Legionari
Jul 1
TRS6:35 amTrieste Ronchi dei Legionari
35h 58m
2 stops
DEN10:33 amDenver Intl
$1,568
United Airlines
Jun 13
DEN6:10 pmDenver Intl
56h 15m
2 stops
TRS10:25 amTrieste Ronchi dei Legionari
Jul 7
TRS6:35 amTrieste Ronchi dei Legionari
35h 58m
2 stops
DEN10:33 amDenver Intl
$1,572
United Airlines
Jun 13
DEN6:10 pmDenver Intl
56h 15m
2 stops
TRS10:25 amTrieste Ronchi dei Legionari
Jul 2
TRS6:35 amTrieste Ronchi dei Legionari
36h 00m
2 stops
DEN10:35 amDenver Intl
$1,577

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 April 11, 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
Quickest round-trip

DenverTrieste

DEN - TRS

DENTRS

Denver Intl

Fri 8/14

5:40 pm-1:55 pm

1 stop12h 15m

Trieste Ronchi dei Legionari

Thu 8/20

6:15 am-3:40 pm

1 stop17h 25m

$973

DenverTrieste

DEN - TRS

DENTRS

Denver Intl

Fri 8/14

6:00 pm-9:55 pm

2 stops19h 55m

Trieste Ronchi dei Legionari

Thu 8/20

6:15 am-3:40 pm

1 stop17h 25m

$977

DenverTrieste

DEN - TRS

DENTRS

Denver Intl

Fri 8/14

6:00 pm-9:55 pm

2 stops19h 55m

Trieste Ronchi dei Legionari

Thu 8/20

6:15 am-1:45 pm

2 stops15h 30m

$1,010

DenverTrieste

DEN - TRS

DENTRS

Denver Intl

Thu 9/17

12:01 pm-10:15 pm

2 stops26h 14m

Trieste Ronchi dei Legionari

Wed 9/23

6:10 am-11:17 pm

2 stops25h 07m

$1,046

DenverTrieste

DEN - TRS

DENTRS

Denver Intl

Thu 9/17

5:40 pm-10:15 pm

1 stop20h 35m

Trieste Ronchi dei Legionari

Wed 9/23

6:10 am-3:40 pm

1 stop17h 30m

$1,109

DenverTrieste

DEN - TRS

DENTRS

Denver Intl

Thu 9/17

5:40 pm-10:15 pm

1 stop20h 35m

Trieste Ronchi dei Legionari

Wed 9/23

6:10 am-11:08 pm

2 stops24h 58m

$1,110

DenverTrieste

DEN - TRS

DENTRS

Denver Intl

Thu 9/17

4:15 pm-8:15 pm

2 stops20h 00m

Trieste Ronchi dei Legionari

Wed 9/23

3:15 pm-7:00 pm

3 stops35h 45m

$1,268

DenverTrieste

DEN - TRS

DENTRS

Denver Intl

Thu 9/17

4:40 pm-10:55 pm

3 stops22h 15m

Trieste Ronchi dei Legionari

Wed 9/23

3:15 pm-7:00 pm

3 stops35h 45m

$1,274

DenverTrieste

DEN - TRS

DENTRS

Denver Intl

Tue 7/7

5:40 pm-10:15 pm

1 stop20h 35m

Trieste Ronchi dei Legionari

Mon 7/27

6:10 am-1:45 pm

2 stops39h 35m

$1,291

DenverTrieste

DEN - TRS

DENTRS

Denver Intl

Tue 7/7

8:10 pm-6:30 pm

2 stops38h 20m

Trieste Ronchi dei Legionari

Mon 7/27

11:15 am-12:40 pm

2 stops33h 25m

$1,294

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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

Can stopping save me money on Denver to Trieste flights?

You could potentially save up to 58% on your flight if you consider stops on a Denver to Trieste flight.

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

12h 15m

Direct flights

None
The fastest flight from Denver to Trieste takes 12h 15m
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 12h 15m.

  • 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.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Mon 5/11
Mon 5/18
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Italy

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
SWISS
Delta