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 Los Angeles to Venice Marco Polo Airport is 14h on average, while flying from San Francisco to Venice Marco Polo Airport is 14h 15m on average. Venice Marco Polo Airport is the most popular airport in Trieste.

What airlines fly to Trieste?

United Airlines, British Airways and Lufthansa 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 31% 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.

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

Lufthansa, TAP AIR PORTUGAL, and SWISS are the most popular carriers operating from California to Trieste Ronchi dei Legionari

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 May 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.

$438 Cheap Flights from California to Trieste in 2026

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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.

6:50 am - 10:15 pm

LAS

TRS

30h 25m

2 stops

6:10 am - 4:58 pm

TRS

LAS

43h 48m

2 stops

$843Multiple Airlines

Tue, Oct 13 - Wed, Oct 21

6:50 am - 10:15 pm

LAS

TRS

30h 25m

2 stops

6:10 am - 4:20 pm

TRS

LAS

19h 10m

1 stop

$868Multiple Airlines

Tue, Oct 13 - Wed, Oct 21

3:15 pm - 9:55 pm

LAX

TRS

21h 40m

2 stops

6:10 am - 12:41 am

TRS

LAX

27h 31m

2 stops

$943Lufthansa

Fri, Sep 11 - Fri, Oct 2

2:40 pm - 10:15 pm

SFO

TRS

22h 35m

1 stop

6:15 am - 12:40 pm

TRS

SFO

15h 25m

1 stop

$965Lufthansa

Sun, Sep 13 - Thu, Oct 1

3:15 pm - 10:25 am

LAX

TRS

34h 10m

1 stop

6:35 am - 1:15 pm

TRS

LAX

15h 40m

1 stop

$994ITA Airways

Fri, Sep 11 - Fri, Oct 2

3:15 pm - 2:30 pm

SFO

TRS

14h 15m

1 stop

6:35 am - 1:15 pm

TRS

SFO

15h 40m

1 stop

$1,004ITA Airways

Tue, Sep 15 - Fri, Oct 2

4:40 pm - 2:30 pm

LAX

TRS

36h 50m

2 stops

3:15 pm - 7:30 pm

TRS

LAX

37h 15m

2 stops

$1,178TAP AIR PORTUGAL

Sun, May 24 - Wed, Jun 3

4:40 pm - 10:55 pm

LAX

TRS

45h 15m

2 stops

3:15 pm - 7:30 pm

TRS

LAX

37h 15m

2 stops

$1,300TAP AIR PORTUGAL

Sun, May 24 - Wed, May 27

1:18 pm - 10:25 am

ONT

TRS

36h 07m

2 stops

6:35 am - 10:51 pm

TRS

ONT

25h 16m

2 stops

$1,557United Airlines

Mon, May 25 - Mon, Jun 1

6:30 pm - 10:25 am

ONT

TRS

54h 55m

2 stops

6:35 am - 10:51 pm

TRS

ONT

25h 16m

2 stops

$1,565United Airlines

Sun, May 24 - Mon, Jun 1

Lufthansa flights from California to Trieste

Our best Lufthansa deals on California to Trieste flight tickets

Lufthansa

May 13

LAX3:05 pmLos Angeles

13h 55m

1 stop

TRS2:00 pmTrieste Ronchi dei Legionari

May 20

TRS6:10 amTrieste Ronchi dei Legionari

16h 00m

1 stop

LAX1:10 pmLos Angeles

$868

Lufthansa

May 13

LAX7:15 amLos Angeles

21h 45m

2 stops

TRS2:00 pmTrieste Ronchi dei Legionari

May 21

TRS6:15 amTrieste Ronchi dei Legionari

15h 55m

1 stop

LAX1:10 pmLos Angeles

$873

Lufthansa

May 17

LAX5:30 pmLos Angeles

19h 45m

2 stops

TRS10:15 pmTrieste Ronchi dei Legionari

May 26

TRS6:20 amTrieste Ronchi dei Legionari

15h 50m

1 stop

LAX1:10 pmLos Angeles

$888

ITA Airways flights from California to Trieste

Our best ITA Airways deals on California to Trieste flight tickets

ITA Airways

Sep 11

LAX3:15 pmLos Angeles

34h 10m

1 stop

TRS10:25 amTrieste Ronchi dei Legionari

Oct 2

TRS6:35 amTrieste Ronchi dei Legionari

15h 40m

1 stop

LAX1:15 pmLos Angeles

$994

ITA Airways

Sep 15

SFO3:15 pmSan Francisco

14h 15m

1 stop

TRS2:30 pmTrieste Ronchi dei Legionari

Oct 2

TRS6:35 amTrieste Ronchi dei Legionari

15h 40m

1 stop

SFO1:15 pmSan Francisco

$1,004

ITA Airways

Sep 15

SFO3:15 pmSan Francisco

14h 15m

1 stop

TRS2:30 pmTrieste Ronchi dei Legionari

Oct 3

TRS6:35 amTrieste Ronchi dei Legionari

15h 40m

1 stop

SFO1:15 pmSan Francisco

$1,054

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Las VegasTrieste

LAS - TRS

LASTRS

Las Vegas Harry Reid Intl

Tue 10/13

6:50 am-10:15 pm

2 stops30h 25m

Trieste Ronchi dei Legionari

Wed 10/21

6:10 am-4:58 pm

2 stops43h 48m

$843

Las VegasTrieste

LAS - TRS

LASTRS

Las Vegas Harry Reid Intl

Tue 10/13

6:50 am-10:15 pm

2 stops30h 25m

Trieste Ronchi dei Legionari

Wed 10/21

6:10 am-4:20 pm

1 stop19h 10m

$868

Los AngelesTrieste

LAX - TRS

LAXTRS

Los Angeles

Fri 9/11

3:15 pm-9:55 pm

2 stops21h 40m

Trieste Ronchi dei Legionari

Fri 10/2

6:10 am-12:41 am

2 stops27h 31m

$943

San FranciscoTrieste

SFO - TRS

SFOTRS

San Francisco

Sun 9/13

2:40 pm-10:15 pm

1 stop22h 35m

Trieste Ronchi dei Legionari

Thu 10/1

6:15 am-12:40 pm

1 stop15h 25m

$965

Los AngelesTrieste

LAX - TRS

LAXTRS

Los Angeles

Fri 9/11

3:15 pm-10:25 am

1 stop34h 10m

Trieste Ronchi dei Legionari

Fri 10/2

6:35 am-1:15 pm

1 stop15h 40m

$994

Quickest round-trip

San FranciscoTrieste

SFO - TRS

SFOTRS

San Francisco

Tue 9/15

3:15 pm-2:30 pm

1 stop14h 15m

Trieste Ronchi dei Legionari

Fri 10/2

6:35 am-1:15 pm

1 stop15h 40m

$1,004

Los AngelesTrieste

LAX - TRS

LAXTRS

Los Angeles

Sun 5/24

4:40 pm-2:30 pm

2 stops36h 50m

Trieste Ronchi dei Legionari

Wed 6/3

3:15 pm-7:30 pm

2 stops37h 15m

$1,178

Los AngelesTrieste

LAX - TRS

LAXTRS

Los Angeles

Sun 5/24

4:40 pm-10:55 pm

2 stops45h 15m

Trieste Ronchi dei Legionari

Wed 5/27

3:15 pm-7:30 pm

2 stops37h 15m

$1,300

OntarioTrieste

ONT - TRS

ONTTRS

Ontario

Mon 5/25

1:18 pm-10:25 am

2 stops36h 07m

Trieste Ronchi dei Legionari

Mon 6/1

6:35 am-10:51 pm

2 stops25h 16m

$1,557

OntarioTrieste

ONT - TRS

ONTTRS

Ontario

Sun 5/24

6:30 pm-10:25 am

2 stops54h 55m

Trieste Ronchi dei Legionari

Mon 6/1

6:35 am-10:51 pm

2 stops25h 16m

$1,565

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

Prices

Airlines

Other information

Can stopping save me money on California to Trieste flights?

You could potentially save up to 7% on your flight if you consider stops on a California to Trieste flight.

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.

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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 May 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 1,213 reviews		Search ITA Airways flights
Lufthansa	PriceFrom $680	Free Cancellation	Rating 6.8 7,992 reviews		Search Lufthansa flights

Udine

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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.