What airlines fly to California?

Lufthansa, United Airlines and British Airways are the top three most popular airlines that fly to California from Trieste according to our data. Lufthansa is the first choice among our users, with 32% of people opting to fly with this airline when traveling to California. Keep in mind that there are 7 different airlines that fly to California on a routine basis, so you have a few additional options to choose from.

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

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

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

Prices for flights from Trieste Ronchi dei Legionari Airport to California refresh daily.

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

There are 2 operators available for flights from Trieste Ronchi dei Legionari Airport to California as of July 2026.

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

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Trieste Ronchi dei Legionari Airport to California.

What documentation or ID do you need to fly to California?

The required travel and health documents for your California trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at California. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$510 Cheap Flights from Trieste to California in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Trieste to California

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:35 am - 1:15 pm

TRS

SFO

15h 40m

1 stop

3:15 pm - 6:30 pm

SFO

TRS

18h 15m

1 stop

$548ITA Airways

Tue, Sep 1 - Mon, Oct 5

6:35 am - 1:15 pm

TRS

SFO

15h 40m

1 stop

3:15 pm - 6:30 pm

SFO

TRS

18h 15m

1 stop

$549ITA Airways

Tue, Sep 1 - Sun, Sep 6

7:15 pm - 1:15 pm

TRS

LAX

27h 00m

1 stop

3:15 pm - 6:30 pm

LAX

TRS

18h 15m

1 stop

$568ITA Airways

Thu, Oct 15 - Mon, Oct 19

6:15 am - 12:40 pm

TRS

SFO

15h 25m

1 stop

7:25 pm - 9:55 pm

SFO

TRS

17h 30m

1 stop

$612Lufthansa

Thu, Sep 3 - Fri, Oct 2

6:10 am - 7:45 pm

TRS

SFO

22h 35m

1 stop

7:25 pm - 9:55 pm

SFO

TRS

17h 30m

1 stop

$618Lufthansa

Wed, Sep 2 - Fri, Oct 2

6:10 am - 4:20 pm

TRS

LAS

19h 10m

1 stop

6:50 am - 10:15 pm

LAS

TRS

30h 25m

2 stops

$1,034Multiple Airlines

Fri, Jul 17 - Tue, Jul 21

11:15 am - 10:29 am

TRS

LAS

32h 14m

2 stops

12:16 pm - 10:55 pm

LAS

TRS

25h 39m

2 stops

$1,036Multiple Airlines

Fri, Jul 17 - Tue, Jul 21

6:35 am - 8:36 pm

TRS

SAN

23h 01m

2 stops

6:15 am - 10:25 am

SAN

TRS

43h 10m

2 stops

$1,180United Airlines

Thu, Sep 24 - Mon, Sep 28

6:35 am - 8:36 pm

TRS

SAN

23h 01m

2 stops

6:15 am - 10:25 am

SAN

TRS

43h 10m

2 stops

$1,182United Airlines

Thu, Sep 24 - Mon, Sep 28

6:35 am - 10:57 pm

TRS

SAN

25h 22m

2 stops

1:36 pm - 10:55 pm

SAN

TRS

48h 19m

2 stops

$1,259Air France

Tue, Jul 14 - Sat, Jul 18

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Lufthansa flights from Trieste to California

Our best Lufthansa deals on Trieste to California flight tickets

Lufthansa

Sep 3

TRS6:15 amTrieste Ronchi dei Legionari

15h 25m

1 stop

SFO12:40 pmSan Francisco

Oct 2

SFO7:25 pmSan Francisco

17h 30m

1 stop

TRS9:55 pmTrieste Ronchi dei Legionari

$612

Lufthansa

Sep 2

TRS6:10 amTrieste Ronchi dei Legionari

18h 05m

1 stop

SFO3:15 pmSan Francisco

Oct 3

SFO1:55 pmSan Francisco

23h 20m

1 stop

TRS10:15 pmTrieste Ronchi dei Legionari

$618

Lufthansa

Sep 3

TRS6:15 amTrieste Ronchi dei Legionari

15h 25m

1 stop

SFO12:40 pmSan Francisco

Oct 2

SFO7:25 pmSan Francisco

17h 30m

1 stop

TRS9:55 pmTrieste Ronchi dei Legionari

$646

TAP AIR PORTUGAL flights from Trieste to California

Our best TAP AIR PORTUGAL deals on Trieste to California flight tickets

TAP AIR PORTUGAL

Sep 12

TRS3:15 pmTrieste Ronchi dei Legionari

31h 15m

2 stops

LAX1:30 pmLos Angeles Los Angeles

Sep 25

LAX4:40 pmLos Angeles Los Angeles

36h 50m

2 stops

TRS2:30 pmTrieste Ronchi dei Legionari

$998

TAP AIR PORTUGAL

Oct 23

TRS11:15 amTrieste Ronchi dei Legionari

39h 20m

2 stops

SFO5:35 pmSan Francisco

Oct 30

SFO8:15 pmSan Francisco

38h 15m

2 stops

TRS6:30 pmTrieste Ronchi dei Legionari

$1,193

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

TriesteSan Francisco

TRS - SFO

TRSSFO

Trieste Ronchi dei Legionari

Tue 9/1

6:35 am-1:15 pm

1 stop15h 40m

San Francisco

Mon 10/5

3:15 pm-6:30 pm

1 stop18h 15m

$548

TriesteSan Francisco

TRS - SFO

TRSSFO

Trieste Ronchi dei Legionari

Tue 9/1

6:35 am-1:15 pm

1 stop15h 40m

San Francisco

Sun 9/6

3:15 pm-6:30 pm

1 stop18h 15m

$549

TriesteLos Angeles

TRS - LAX

TRSLAX

Trieste Ronchi dei Legionari

Thu 10/15

7:15 pm-1:15 pm

1 stop27h 00m

Los Angeles Los Angeles

Mon 10/19

3:15 pm-6:30 pm

1 stop18h 15m

$568

Quickest round-trip

TriesteSan Francisco

TRS - SFO

TRSSFO

Trieste Ronchi dei Legionari

Thu 9/3

6:15 am-12:40 pm

1 stop15h 25m

San Francisco

Fri 10/2

7:25 pm-9:55 pm

1 stop17h 30m

$612

TriesteSan Francisco

TRS - SFO

TRSSFO

Trieste Ronchi dei Legionari

Wed 9/2

6:10 am-7:45 pm

1 stop22h 35m

San Francisco

Fri 10/2

7:25 pm-9:55 pm

1 stop17h 30m

$618

TriesteLas Vegas

TRS - LAS

TRSLAS

Trieste Ronchi dei Legionari

Fri 7/17

6:10 am-4:20 pm

1 stop19h 10m

Las Vegas Harry Reid Intl

Tue 7/21

6:50 am-10:15 pm

2 stops30h 25m

$1,034

TriesteLas Vegas

TRS - LAS

TRSLAS

Trieste Ronchi dei Legionari

Fri 7/17

11:15 am-10:29 am

2 stops32h 14m

Las Vegas Harry Reid Intl

Tue 7/21

12:16 pm-10:55 pm

2 stops25h 39m

$1,036

TriesteSan Diego

TRS - SAN

TRSSAN

Trieste Ronchi dei Legionari

Thu 9/24

6:35 am-8:36 pm

2 stops23h 01m

San Diego

Mon 9/28

6:15 am-10:25 am

2 stops43h 10m

$1,180

TriesteSan Diego

TRS - SAN

TRSSAN

Trieste Ronchi dei Legionari

Thu 9/24

6:35 am-8:36 pm

2 stops23h 01m

San Diego

Mon 9/28

6:15 am-10:25 am

2 stops43h 10m

$1,182

TriesteSan Diego

TRS - SAN

TRSSAN

Trieste Ronchi dei Legionari

Tue 7/14

6:35 am-10:57 pm

2 stops25h 22m

San Diego

Sat 7/18

1:36 pm-10:55 pm

2 stops48h 19m

$1,259

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 Trieste to California

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

What is the cheapest month to fly to California?

The month of February is another great option to travel to California, with average flight prices from Trieste averaging around $443.

Can stopping save me money on Trieste to California flights?

You could potentially save up to 34% on your flight if you consider stops on a Trieste to California flight.

Cheap Trieste to California flight deals and tips

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

Fastest flight time	15h 25m
Direct flights	None

The fastest flight from Trieste to California takes 15h 25m

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

Search flight deals

Frequently asked questions about flying from Trieste to California

When did momondo last update prices for flights from Trieste Ronchi dei Legionari Airport to California?
Prices for flights from Trieste Ronchi dei Legionari Airport to California refresh daily.
How many operators does momondo search for flights from Trieste Ronchi dei Legionari Airport to California?
There are 2 operators available for flights from Trieste Ronchi dei Legionari Airport to California as of July 2026.
How old do you have to be to fly from Trieste Ronchi dei Legionari Airport to California?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Trieste Ronchi dei Legionari Airport to California.
What documentation or ID do you need to fly to California?
The required travel and health documents for your California trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at California. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from Trieste to California

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

Airline	Rating	Free Cancellation	Price
ITA Airways	PriceFrom $558	Free Cancellation	Rating 6.7 1,273 reviews		Search ITA Airways flights
Lufthansa	PriceFrom $653	Free Cancellation	Rating 6.8 8,108 reviews		Search Lufthansa flights

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Trieste to California. Millions of users trust and use momondo every year so you are in good hands.

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

Yes. momondo allows you to filter the results for Trieste to California flights to just show those with flexible booking policies.

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

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

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

If you are simply researching potential flights to California, momondo offers a useful price alert feature which will track prices for flights to California from Trieste and alert you when they change.