How long does it take to fly to Trieste?

Average flight duration from California to Trieste depends on which airport you fly into and out of. Flying from San Diego to Venice Marco Polo Airport is 13h 40m on average, while flying from Los Angeles to Venice Marco Polo Airport is 14h on average. Venice Marco Polo Airport is the most popular airport in Trieste.

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

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

How many operators does momondo search for flights from California to Trieste Ronchi dei Legionari Airport?

As of July 2026, there are 2 operators available to choose from for flights from California to Trieste Ronchi dei Legionari Airport.

How old do you have to be to fly from California 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 California 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.

$543 Cheap Flights from California to Trieste in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from California to Trieste

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

3:15 pm - 6:30 pm

LAX

TRS

18h 15m

1 stop

11:15 am - 1:15 pm

TRS

LAX

35h 00m

1 stop

$723ITA Airways

Mon, Jul 27 - Mon, Aug 24

3:15 pm - 6:30 pm

LAX

TRS

18h 15m

1 stop

7:15 pm - 1:15 pm

TRS

LAX

27h 00m

1 stop

$725ITA Airways

Sun, Aug 16 - Mon, Aug 24

6:40 pm - 10:15 pm

LAX

TRS

18h 35m

1 stop

6:20 am - 1:10 pm

TRS

LAX

15h 50m

1 stop

$764Lufthansa

Tue, Aug 18 - Tue, Aug 25

3:20 pm - 10:15 pm

LAX

TRS

21h 55m

2 stops

6:20 am - 1:10 pm

TRS

LAX

15h 50m

1 stop

$771Lufthansa

Tue, Aug 18 - Tue, Aug 25

10:25 pm - 1:45 pm

LAX

TRS

30h 20m

2 stops

2:50 pm - 1:10 pm

TRS

LAX

31h 20m

1 stop

$777Multiple Airlines

Mon, Jul 27 - Mon, Aug 24

9:00 am - 10:55 pm

LAX

TRS

28h 55m

2 stops

7:15 pm - 10:59 pm

TRS

LAX

36h 44m

2 stops

$793Multiple Airlines

Mon, Jul 27 - Mon, Aug 24

5:00 am - 10:25 am

ONT

TRS

44h 25m

2 stops

6:35 am - 8:56 pm

TRS

ONT

23h 21m

2 stops

$1,013United Airlines

Sun, Nov 8 - Wed, Nov 18

11:22 am - 10:25 am

SNA

TRS

38h 03m

2 stops

6:35 am - 9:01 pm

TRS

SNA

23h 26m

2 stops

$1,013United Airlines

Sun, Nov 15 - Thu, Nov 19

9:55 am - 2:30 pm

LAS

TRS

19h 35m

2 stops

6:35 am - 10:21 pm

TRS

LAS

24h 46m

2 stops

$1,022KLM

Thu, Oct 8 - Thu, Oct 22

7:05 am - 2:30 pm

ONT

TRS

22h 25m

2 stops

6:35 am - 9:52 pm

TRS

ONT

24h 17m

2 stops

$1,040KLM

Mon, Jul 27 - Mon, Aug 24

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ITA Airways flights from California to Trieste

Our best ITA Airways deals on California to Trieste flight tickets

ITA Airways

Jul 27

LAX3:15 pmLos Angeles

18h 15m

1 stop

TRS6:30 pmTrieste Ronchi dei Legionari

Aug 24

TRS11:15 amTrieste Ronchi dei Legionari

35h 00m

1 stop

LAX1:15 pmLos Angeles

$723

ITA Airways

Aug 16

LAX3:15 pmLos Angeles

18h 15m

1 stop

TRS6:30 pmTrieste Ronchi dei Legionari

Aug 24

TRS7:15 pmTrieste Ronchi dei Legionari

27h 00m

1 stop

LAX1:15 pmLos Angeles

$725

ITA Airways

Aug 17

SFO3:15 pmSan Francisco

18h 15m

1 stop

TRS6:30 pmTrieste Ronchi dei Legionari

Aug 24

TRS7:15 pmTrieste Ronchi dei Legionari

27h 00m

1 stop

SFO1:15 pmSan Francisco

$733

United Airlines flights from California to Trieste

Our best United Airlines deals on California to Trieste flight tickets

United Airlines

Nov 15

SNA11:22 amSanta Ana J. Wayne/Orange Cnty

38h 03m

2 stops

TRS10:25 amTrieste Ronchi dei Legionari

Nov 19

TRS6:35 amTrieste Ronchi dei Legionari

23h 26m

2 stops

SNA9:01 pmSanta Ana J. Wayne/Orange Cnty

$1,013

United Airlines

Nov 15

SNA2:03 pmSanta Ana J. Wayne/Orange Cnty

35h 22m

3 stops

TRS10:25 amTrieste Ronchi dei Legionari

Nov 19

TRS6:35 amTrieste Ronchi dei Legionari

20h 45m

2 stops

SNA6:20 pmSanta Ana J. Wayne/Orange Cnty

$1,028

United Airlines

Dec 4

LAS11:30 pmLas Vegas Harry Reid Intl

25h 55m

2 stops

TRS10:25 amTrieste Ronchi dei Legionari

Dec 8

TRS6:35 amTrieste Ronchi dei Legionari

26h 09m

3 stops

LAS11:44 pmLas Vegas Harry Reid Intl

$1,115

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Los AngelesTrieste

LAX - TRS

LAXTRS

Los Angeles

Mon 7/27

3:15 pm-6:30 pm

1 stop18h 15m

Trieste Ronchi dei Legionari

Mon 8/24

11:15 am-1:15 pm

1 stop35h 00m

$723

Los AngelesTrieste

LAX - TRS

LAXTRS

Los Angeles

Sun 8/16

3:15 pm-6:30 pm

1 stop18h 15m

Trieste Ronchi dei Legionari

Mon 8/24

7:15 pm-1:15 pm

1 stop27h 00m

$725

Quickest round-trip

Los AngelesTrieste

LAX - TRS

LAXTRS

Los Angeles

Tue 8/18

6:40 pm-10:15 pm

1 stop18h 35m

Trieste Ronchi dei Legionari

Tue 8/25

6:20 am-1:10 pm

1 stop15h 50m

$764

Los AngelesTrieste

LAX - TRS

LAXTRS

Los Angeles

Tue 8/18

3:20 pm-10:15 pm

2 stops21h 55m

Trieste Ronchi dei Legionari

Tue 8/25

6:20 am-1:10 pm

1 stop15h 50m

$771

Los AngelesTrieste

LAX - TRS

LAXTRS

Los Angeles

Mon 7/27

10:25 pm-1:45 pm

2 stops30h 20m

Trieste Ronchi dei Legionari

Mon 8/24

2:50 pm-1:10 pm

1 stop31h 20m

$777

Los AngelesTrieste

LAX - TRS

LAXTRS

Los Angeles

Mon 7/27

9:00 am-10:55 pm

2 stops28h 55m

Trieste Ronchi dei Legionari

Mon 8/24

7:15 pm-10:59 pm

2 stops36h 44m

$793

OntarioTrieste

ONT - TRS

ONTTRS

Ontario

Sun 11/8

5:00 am-10:25 am

2 stops44h 25m

Trieste Ronchi dei Legionari

Wed 11/18

6:35 am-8:56 pm

2 stops23h 21m

$1,013

Santa AnaTrieste

SNA - TRS

SNATRS

Santa Ana J. Wayne/Orange Cnty

Sun 11/15

11:22 am-10:25 am

2 stops38h 03m

Trieste Ronchi dei Legionari

Thu 11/19

6:35 am-9:01 pm

2 stops23h 26m

$1,013

Las VegasTrieste

LAS - TRS

LASTRS

Las Vegas Harry Reid Intl

Thu 10/8

9:55 am-2:30 pm

2 stops19h 35m

Trieste Ronchi dei Legionari

Thu 10/22

6:35 am-10:21 pm

2 stops24h 46m

$1,022

OntarioTrieste

ONT - TRS

ONTTRS

Ontario

Mon 7/27

7:05 am-2:30 pm

2 stops22h 25m

Trieste Ronchi dei Legionari

Mon 8/24

6:35 am-9:52 pm

2 stops24h 17m

$1,040

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from California 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

Airlines

Other information

What is the cheapest airline that flies from California to Trieste Ronchi dei Legionari?

United Airlines, TAP AIR PORTUGAL, and ITA Airways are the most popular carriers operating from California to Trieste Ronchi dei Legionari

What airlines fly to Trieste?

United Airlines, Condor and British Airways are the top three most popular airlines that fly to Trieste from California according to our data. United Airlines is the first choice among our users, with 29% of people opting to fly with this airline when traveling to Trieste. Keep in mind that there are 16 different airlines that fly to Trieste on a routine basis, so you have a few additional options to choose from.

Cheap California to Trieste flight deals and tips

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

Fastest flight time	14h 15m
Direct flights	None

The fastest flight from California to Trieste takes 14h 15m

There are no direct flights from California to Trieste. There are no popular flight routes from California to Trieste.

Search flight deals

Frequently asked questions about flying from California to Trieste

When did momondo last update prices for flights from California to Trieste Ronchi dei Legionari Airport?
Prices for flights from California to Trieste Ronchi dei Legionari Airport are refreshed on a daily basis.
How many operators does momondo search for flights from California to Trieste Ronchi dei Legionari Airport?
As of July 2026, there are 2 operators available to choose from for flights from California to Trieste Ronchi dei Legionari Airport.
How old do you have to be to fly from California 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 California 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.

Best airlines flying from California to Trieste

Compare and see reviews for airlines that fly from California to Trieste with momondo

Airline	Rating	Free Cancellation	Price
ITA Airways	PriceFrom $579	Free Cancellation	Rating 6.7 1,282 reviews		Search ITA Airways flights
Lufthansa	PriceFrom $680	Free Cancellation	Rating 6.8 8,124 reviews		Search Lufthansa flights

Udine

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Why use momondo?

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

It is quick and easy to find California 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 California to Trieste with flexible booking policies on momondo?

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

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

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 California to Trieste.

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

Price alerts on flights to Trieste from California are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.