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Cheap flights from Colorado to Trieste from $407

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Colorado to Trieste departing on 9/11. 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 Colorado to Trieste

Cheap round-trip flights

Enter your travel dates to find the best prices.
ITA Airways Logo
6:00 am - 10:55 pmDEN  Denver Intl-TRS Trieste Ronchi dei Legionari
32h 55m2 stops Washington, D.C. Dulles Intl Rome Fiumicino
ITA Airways Logo
7:15 pm - 7:30 pmTRS  Trieste Ronchi dei Legionari-DEN Denver Intl
32h 15m2 stops Rome Fiumicino Washington, D.C. Dulles Intl
$913ITA Airways
Sun, Nov 1 - Mon, Nov 9
Lufthansa Logo
5:40 pm - 10:25 pmDEN  Denver Intl-TRS Trieste Ronchi dei Legionari
20h 45m1 stop Frankfurt am Main
Lufthansa Logo
6:10 am - 3:40 pmTRS  Trieste Ronchi dei Legionari-DEN Denver Intl
17h 30m1 stop Frankfurt am Main
$1,031Lufthansa
Wed, Sep 30 - Wed, Oct 14
Lufthansa Logo
5:40 pm - 10:15 pmDEN  Denver Intl-TRS Trieste Ronchi dei Legionari
20h 35m1 stop Frankfurt am Main
Lufthansa Logo
2:45 pm - 11:53 pmTRS  Trieste Ronchi dei Legionari-DEN Denver Intl
17h 08m2 stops Frankfurt am Main Chicago O'Hare Intl
$1,035Lufthansa
Sun, Sep 20 - Tue, Oct 6
Lufthansa Logo
5:40 pm - 1:55 pmDEN  Denver Intl-TRS Trieste Ronchi dei Legionari
12h 15m1 stop Frankfurt am Main
Lufthansa Logo
6:20 am - 3:40 pmTRS  Trieste Ronchi dei Legionari-DEN Denver Intl
17h 20m1 stop Frankfurt am Main
$1,036Lufthansa
Mon, Sep 28 - Tue, Oct 13
Lufthansa Logo
6:10 pm - 10:25 pmDEN  Denver Intl-TRS Trieste Ronchi dei Legionari
20h 15m2 stops Chicago O'Hare Intl Frankfurt am Main
Lufthansa Logo
6:15 am - 3:40 pmTRS  Trieste Ronchi dei Legionari-DEN Denver Intl
17h 25m1 stop Frankfurt am Main
$1,041Lufthansa
Mon, Sep 28 - Thu, Oct 15
Lufthansa Logo
5:40 pm - 10:15 pmDEN  Denver Intl-TRS Trieste Ronchi dei Legionari
20h 35m1 stop Frankfurt am Main
Lufthansa Logo
6:15 am - 11:54 pmTRS  Trieste Ronchi dei Legionari-DEN Denver Intl
25h 39m2 stops Frankfurt am Main Chicago O'Hare Intl
$1,046Lufthansa
Sun, Oct 4 - Thu, Oct 15
Lufthansa Logo
6:10 pm - 10:25 pmDEN  Denver Intl-TRS Trieste Ronchi dei Legionari
20h 15m2 stops Chicago O'Hare Intl Frankfurt am Main
Lufthansa Logo
6:10 am - 12:30 amTRS  Trieste Ronchi dei Legionari-DEN Denver Intl
26h 20m2 stops Frankfurt am Main Washington, D.C. Dulles Intl
$1,051Lufthansa
Mon, Sep 28 - Wed, Oct 14
KLM Logo
6:35 am - 6:30 pmDEN  Denver Intl-TRS Trieste Ronchi dei Legionari
27h 55m2 stops New York John F Kennedy Intl Rome Fiumicino
KLM Logo
3:15 pm - 5:08 pmTRS  Trieste Ronchi dei Legionari-DEN Denver Intl
33h 53m2 stops Rome Fiumicino Detroit Metropolitan Wayne County
$1,052KLM
Sun, Sep 20 - Mon, Oct 5
Multiple Airlines Logo
7:51 am - 9:55 pmDEN  Denver Intl-TRS Trieste Ronchi dei Legionari
30h 04m2 stops Vancouver Intl Frankfurt am Main
Multiple Airlines Logo
6:20 am - 6:18 pmTRS  Trieste Ronchi dei Legionari-DEN Denver Intl
19h 58m2 stops Frankfurt am Main Vancouver Intl
$1,065Multiple Airlines
Fri, Aug 21 - Tue, Aug 25
Lufthansa Logo
4:05 pm - 10:15 pmDEN  Denver Intl-TRS Trieste Ronchi dei Legionari
22h 10m2 stops Munich Franz Josef Strauss Frankfurt am Main
Lufthansa Logo
6:10 am - 12:30 amTRS  Trieste Ronchi dei Legionari-DEN Denver Intl
26h 20m2 stops Frankfurt am Main Washington, D.C. Dulles Intl
$1,066Lufthansa
Sun, Oct 4 - Fri, Oct 16

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Lufthansa flights from Colorado to Trieste

Our best Lufthansa deals on Colorado to Trieste flight tickets
Lufthansa
Sep 20
DEN5:40 pmDenver Intl
20h 35m
1 stop
TRS10:15 pmTrieste Ronchi dei Legionari
Oct 6
TRS2:45 pmTrieste Ronchi dei Legionari
17h 08m
2 stops
DEN11:53 pmDenver Intl
$1,035
Lufthansa
Sep 28
DEN5:40 pmDenver Intl
12h 15m
1 stop
TRS1:55 pmTrieste Ronchi dei Legionari
Oct 13
TRS6:20 amTrieste Ronchi dei Legionari
17h 20m
1 stop
DEN3:40 pmDenver Intl
$1,036
Lufthansa
Sep 28
DEN6:10 pmDenver Intl
20h 15m
2 stops
TRS10:25 pmTrieste Ronchi dei Legionari
Oct 15
TRS6:15 amTrieste Ronchi dei Legionari
17h 25m
1 stop
DEN3:40 pmDenver Intl
$1,041

KLM flights from Colorado to Trieste

Our best KLM deals on Colorado to Trieste flight tickets
KLM
Sep 20
DEN6:35 amDenver Intl
27h 55m
2 stops
TRS6:30 pmTrieste Ronchi dei Legionari
Oct 5
TRS3:15 pmTrieste Ronchi dei Legionari
33h 53m
2 stops
DEN5:08 pmDenver Intl
$1,052
KLM
Oct 31
DEN12:15 pmDenver Intl
19h 15m
2 stops
TRS2:30 pmTrieste Ronchi dei Legionari
Nov 9
TRS3:15 pmTrieste Ronchi dei Legionari
40h 09m
2 stops
DEN11:24 pmDenver Intl
$1,098
KLM
Sep 20
DEN6:35 amDenver Intl
23h 55m
2 stops
TRS2:30 pmTrieste Ronchi dei Legionari
Oct 4
TRS3:15 pmTrieste Ronchi dei Legionari
34h 06m
2 stops
DEN5:21 pmDenver Intl
$1,112

momondo Fare Finder

 
Customize your flight search to find flights from Colorado 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 August 10, 2026.
Use the filters below to find and compare flights from Colorado to Trieste that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

DenverTrieste

DEN Denver Intl - TRS Trieste Ronchi dei Legionari

DENTRS

Denver Intl

Sun 11/1

6:00 am-10:55 pm

2 stops32h 55m

Trieste Ronchi dei Legionari

Mon 11/9

7:15 pm-7:30 pm

2 stops32h 15m

$913

DenverTrieste

DEN Denver Intl - TRS Trieste Ronchi dei Legionari

DENTRS

Denver Intl

Wed 9/30

5:40 pm-10:25 pm

1 stop20h 45m

Trieste Ronchi dei Legionari

Wed 10/14

6:10 am-3:40 pm

1 stop17h 30m

$1,031

DenverTrieste

DEN Denver Intl - TRS Trieste Ronchi dei Legionari

DENTRS

Denver Intl

Sun 9/20

5:40 pm-10:15 pm

1 stop20h 35m

Trieste Ronchi dei Legionari

Tue 10/6

2:45 pm-11:53 pm

2 stops17h 08m

$1,035
Quickest round-trip

DenverTrieste

DEN Denver Intl - TRS Trieste Ronchi dei Legionari

DENTRS

Denver Intl

Mon 9/28

5:40 pm-1:55 pm

1 stop12h 15m

Trieste Ronchi dei Legionari

Tue 10/13

6:20 am-3:40 pm

1 stop17h 20m

$1,036

DenverTrieste

DEN Denver Intl - TRS Trieste Ronchi dei Legionari

DENTRS

Denver Intl

Mon 9/28

6:10 pm-10:25 pm

2 stops20h 15m

Trieste Ronchi dei Legionari

Thu 10/15

6:15 am-3:40 pm

1 stop17h 25m

$1,041

DenverTrieste

DEN Denver Intl - TRS Trieste Ronchi dei Legionari

DENTRS

Denver Intl

Sun 10/4

5:40 pm-10:15 pm

1 stop20h 35m

Trieste Ronchi dei Legionari

Thu 10/15

6:15 am-11:54 pm

2 stops25h 39m

$1,046

DenverTrieste

DEN Denver Intl - TRS Trieste Ronchi dei Legionari

DENTRS

Denver Intl

Mon 9/28

6:10 pm-10:25 pm

2 stops20h 15m

Trieste Ronchi dei Legionari

Wed 10/14

6:10 am-12:30 am

2 stops26h 20m

$1,051

DenverTrieste

DEN Denver Intl - TRS Trieste Ronchi dei Legionari

DENTRS

Denver Intl

Sun 9/20

6:35 am-6:30 pm

2 stops27h 55m

Trieste Ronchi dei Legionari

Mon 10/5

3:15 pm-5:08 pm

2 stops33h 53m

$1,052

DenverTrieste

DEN Denver Intl - TRS Trieste Ronchi dei Legionari

DENTRS

Denver Intl

Fri 8/21

7:51 am-9:55 pm

2 stops30h 04m

Trieste Ronchi dei Legionari

Tue 8/25

6:20 am-6:18 pm

2 stops19h 58m

$1,065

DenverTrieste

DEN Denver Intl - TRS Trieste Ronchi dei Legionari

DENTRS

Denver Intl

Sun 10/4

4:05 pm-10:15 pm

2 stops22h 10m

Trieste Ronchi dei Legionari

Fri 10/16

6:10 am-12:30 am

2 stops26h 20m

$1,066

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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How to get the cheapest flight ticket from Colorado 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 Colorado to Trieste flights?

You could potentially save up to 20% on your flight if you consider stops on a Colorado to Trieste flight.

Cheap Colorado to Trieste flight deals and tips

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

Fastest flight time

18h 15m

Direct flights

None
The fastest flight from Colorado to Trieste takes 18h 15m
There are no direct flights from Colorado to Trieste. There are no popular flight routes from Colorado to Trieste.
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Frequently asked questions about flying from Colorado to Trieste

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

    Prices for flights from Colorado to Trieste Ronchi dei Legionari Airport are refreshed on a daily basis.

  • How old do you have to be to fly from Colorado to Trieste Ronchi dei Legionari Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Colorado to Trieste Ronchi dei Legionari Airport.

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

    The necessary travel and health documents for your Trieste Ronchi dei Legionari Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Traveling to a place near Trieste?

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

Why use momondo?

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

It is quick and easy to find Colorado to Trieste flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Trieste that suits you.

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

momondo does allow users to show only those flights to Trieste from Colorado which offer a flexible booking policy as well as other useful filters and features.

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

momondo provides multiple filters to help you find the best flight to Trieste from Colorado. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Yes. momondo can track prices for Colorado 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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Airlines are sorted and displayed according to clicks in the past 7 days on momondo
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