What airlines fly to California?

United Airlines, Lufthansa and British Airways are the top three most popular airlines that fly to California from Trieste according to our data. United Airlines 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?

ITA Airways, Condor, 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 August 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.

$477 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 pmTRS Trieste Ronchi dei Legionari-SFO San Francisco

15h 40m1 stop Rome Fiumicino

3:15 pm - 2:30 pmSFO San Francisco-TRS Trieste Ronchi dei Legionari

14h 15m1 stop Rome Fiumicino

$538ITA Airways

Thu, Sep 3 - Mon, Sep 7

7:15 pm - 1:15 pmTRS Trieste Ronchi dei Legionari-LAX Los Angeles

27h 00m1 stop Rome Fiumicino

3:15 pm - 6:30 pmLAX Los Angeles-TRS Trieste Ronchi dei Legionari

18h 15m1 stop Rome Fiumicino

$556ITA Airways

Tue, Sep 1 - Tue, Sep 29

6:35 am - 1:15 pmTRS Trieste Ronchi dei Legionari-SFO San Francisco

15h 40m1 stop Rome Fiumicino

3:15 pm - 10:25 amSFO San Francisco-TRS Trieste Ronchi dei Legionari

34h 10m1 stop Rome Fiumicino

$562ITA Airways

Thu, Sep 10 - Sat, Sep 19

7:15 pm - 1:15 pmTRS Trieste Ronchi dei Legionari-SFO San Francisco

27h 00m1 stop Rome Fiumicino

3:15 pm - 10:55 pmSFO San Francisco-TRS Trieste Ronchi dei Legionari

22h 40m1 stop Rome Fiumicino

$563ITA Airways

Wed, Sep 9 - Sun, Sep 13

6:35 am - 10:43 pmTRS Trieste Ronchi dei Legionari-SFO San Francisco

25h 08m2 stops Rome Fiumicino New York John F Kennedy Intl

7:00 am - 2:30 pmSFO San Francisco-TRS Trieste Ronchi dei Legionari

22h 30m2 stops New York John F Kennedy Intl Rome Fiumicino

$591KLM

Wed, Nov 11 - Wed, Nov 18

6:35 am - 8:32 pmTRS Trieste Ronchi dei Legionari-SFO San Francisco

22h 57m2 stops Rome Fiumicino Minneapolis St Paul

6:00 am - 2:30 pmSFO San Francisco-TRS Trieste Ronchi dei Legionari

23h 30m2 stops Detroit Metropolitan Wayne County Rome Fiumicino

$591Air France

Wed, Nov 11 - Wed, Nov 18

6:15 am - 12:40 pmTRS Trieste Ronchi dei Legionari-SFO San Francisco

15h 25m1 stop Frankfurt am Main

1:55 pm - 10:25 pmSFO San Francisco-TRS Trieste Ronchi dei Legionari

23h 30m1 stop Frankfurt am Main

$593Lufthansa

Thu, Sep 3 - Mon, Sep 7

6:15 am - 12:40 pmTRS Trieste Ronchi dei Legionari-SFO San Francisco

15h 25m1 stop Frankfurt am Main

1:55 pm - 10:25 pmSFO San Francisco-TRS Trieste Ronchi dei Legionari

23h 30m1 stop Frankfurt am Main

$594Lufthansa

Thu, Sep 3 - Mon, Sep 7

3:15 pm - 5:17 pmTRS Trieste Ronchi dei Legionari-SFO San Francisco

35h 02m2 stops Rome Fiumicino Los Angeles

3:15 pm - 10:25 amSFO San Francisco-TRS Trieste Ronchi dei Legionari

34h 10m1 stop Rome Fiumicino

$596Multiple Airlines

Thu, Sep 10 - Sat, Sep 19

6:10 am - 1:10 pmTRS Trieste Ronchi dei Legionari-LAX Los Angeles

16h 00m1 stop Frankfurt am Main

3:20 pm - 9:55 pmLAX Los Angeles-TRS Trieste Ronchi dei Legionari

21h 35m2 stops Chicago O'Hare Intl Frankfurt am Main

$627Lufthansa

Fri, Sep 25 - Fri, Oct 2

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United Airlines flights from Trieste to California

Our best United Airlines deals on Trieste to California flight tickets

United Airlines

Oct 15

TRS6:35 amTrieste Ronchi dei Legionari

25h 07m

2 stops

SJC10:42 pmSan Jose

Oct 19

SJC6:30 amSan Jose

18h 55m

2 stops

TRS10:25 amTrieste Ronchi dei Legionari

$826

United Airlines

Oct 14

TRS6:35 amTrieste Ronchi dei Legionari

21h 56m

2 stops

LAX7:31 pmLos Angeles

Oct 18

LAX7:00 amLos Angeles

18h 25m

2 stops

TRS10:25 amTrieste Ronchi dei Legionari

$858

United Airlines

Oct 14

TRS6:35 amTrieste Ronchi dei Legionari

21h 56m

2 stops

LAX7:31 pmLos Angeles

Oct 18

LAX7:00 amLos Angeles

18h 25m

2 stops

TRS10:25 amTrieste Ronchi dei Legionari

$860

ITA Airways flights from Trieste to California

Our best ITA Airways deals on Trieste to California flight tickets

ITA Airways

Sep 3

TRS6:35 amTrieste Ronchi dei Legionari

15h 40m

1 stop

SFO1:15 pmSan Francisco

Sep 7

SFO3:15 pmSan Francisco

14h 15m

1 stop

TRS2:30 pmTrieste Ronchi dei Legionari

$538

ITA Airways

Sep 1

TRS7:15 pmTrieste Ronchi dei Legionari

27h 00m

1 stop

LAX1:15 pmLos Angeles

Sep 29

LAX3:15 pmLos Angeles

18h 15m

1 stop

TRS6:30 pmTrieste Ronchi dei Legionari

$556

ITA Airways

Sep 10

TRS6:35 amTrieste Ronchi dei Legionari

15h 40m

1 stop

SFO1:15 pmSan Francisco

Sep 19

SFO3:15 pmSan Francisco

34h 10m

1 stop

TRS10:25 amTrieste Ronchi dei Legionari

$562

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

TriesteSan Francisco

TRS Trieste Ronchi dei Legionari - SFO San Francisco

TRSSFO

Trieste Ronchi dei Legionari

Thu 9/3

6:35 am-1:15 pm

1 stop15h 40m

San Francisco

Mon 9/7

3:15 pm-2:30 pm

1 stop14h 15m

$538

TriesteLos Angeles

TRS Trieste Ronchi dei Legionari - LAX Los Angeles

TRSLAX

Trieste Ronchi dei Legionari

Tue 9/1

7:15 pm-1:15 pm

1 stop27h 00m

Los Angeles

Tue 9/29

3:15 pm-6:30 pm

1 stop18h 15m

$556

TriesteSan Francisco

TRS Trieste Ronchi dei Legionari - SFO San Francisco

TRSSFO

Trieste Ronchi dei Legionari

Thu 9/10

6:35 am-1:15 pm

1 stop15h 40m

San Francisco

Sat 9/19

3:15 pm-10:25 am

1 stop34h 10m

$562

TriesteSan Francisco

TRS Trieste Ronchi dei Legionari - SFO San Francisco

TRSSFO

Trieste Ronchi dei Legionari

Wed 9/9

7:15 pm-1:15 pm

1 stop27h 00m

San Francisco

Sun 9/13

3:15 pm-10:55 pm

1 stop22h 40m

$563

TriesteSan Francisco

TRS Trieste Ronchi dei Legionari - SFO San Francisco

TRSSFO

Trieste Ronchi dei Legionari

Wed 11/11

6:35 am-10:43 pm

2 stops25h 08m

San Francisco

Wed 11/18

7:00 am-2:30 pm

2 stops22h 30m

$591

TriesteSan Francisco

TRS Trieste Ronchi dei Legionari - SFO San Francisco

TRSSFO

Trieste Ronchi dei Legionari

Wed 11/11

6:35 am-8:32 pm

2 stops22h 57m

San Francisco

Wed 11/18

6:00 am-2:30 pm

2 stops23h 30m

$591

TriesteSan Francisco

TRS Trieste Ronchi dei Legionari - SFO San Francisco

TRSSFO

Trieste Ronchi dei Legionari

Thu 9/3

6:15 am-12:40 pm

1 stop15h 25m

San Francisco

Mon 9/7

1:55 pm-10:25 pm

1 stop23h 30m

$593

TriesteSan Francisco

TRS Trieste Ronchi dei Legionari - SFO San Francisco

TRSSFO

Trieste Ronchi dei Legionari

Thu 9/3

6:15 am-12:40 pm

1 stop15h 25m

San Francisco

Mon 9/7

1:55 pm-10:25 pm

1 stop23h 30m

$594

TriesteSan Francisco

TRS Trieste Ronchi dei Legionari - SFO San Francisco

TRSSFO

Trieste Ronchi dei Legionari

Thu 9/10

3:15 pm-5:17 pm

2 stops35h 02m

San Francisco

Sat 9/19

3:15 pm-10:25 am

1 stop34h 10m

$596

TriesteLos Angeles

TRS Trieste Ronchi dei Legionari - LAX Los Angeles

TRSLAX

Trieste Ronchi dei Legionari

Fri 9/25

6:10 am-1:10 pm

1 stop16h 00m

Los Angeles

Fri 10/2

3:20 pm-9:55 pm

2 stops21h 35m

$627

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 October is another great option to travel to California, with average flight prices from Trieste averaging around $596.

Can stopping save me money on Trieste to California flights?

You could potentially save up to 13% 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 40m
Direct flights	None

The fastest flight from Trieste to California takes 15h 40m

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 August 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 1,320 reviews		Search ITA Airways flights
Lufthansa	PriceFrom $653	Free Cancellation	Rating 6.8 8,194 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.