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Trieste

$544+ Cheap flights from California to Trieste (TRS)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/21. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — TRS
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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Cheap flight deals from California to Trieste

Keep the following information in mind while searching for California to Trieste flight deals. Data was last updated September 15, 2025.

Round-trip from

$603
(KLM)

One-way from

$544
(ITA Airways)
From California to Trieste Ronchi dei Legionari
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One-way flight from California to Trieste Ronchi dei Legionari
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Find flight deals from California to Trieste

Cheapest flights from California to Trieste
Explore the most affordable flight options available from California to Trieste. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2025.

This KLM deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/127:05 amONT - TRS
2 stops26h 25mKLM
Sun 11/163:15 pmTRS - ONT
2 stops40h 49mKLM
Deal found 9/13$603
This Billigflug deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Billigflug is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/292:45 pmLAS - TRS
1 stop23h 55mMultiple Airlines
Wed 11/52:40 pmTRS - LAS
2 stops19h 05mMultiple Airlines
Deal found 9/14$611
This Gotogate deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/304:05 pmSFO - TRS
1 stop14h 25mITA Airways
Thu 11/66:35 amTRS - SFO
1 stop15h 30mITA Airways
Deal found 9/15$636
This Gotogate deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/216:40 pmLAX - TRS
1 stop18h 55mLufthansa
Tue 9/306:30 amTRS - LAX
2 stops22h 45mLufthansa
Deal found 9/14$653
This United Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/302:35 pmSFO - TRS
1 stop23h 55mMultiple Airlines
Thu 11/66:25 amTRS - SFO
2 stops20h 25mMultiple Airlines
Deal found 9/15$682
This Expedia deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/3011:07 amLAS - TRS
2 stops27h 23mLufthansa
Thu 11/66:25 amTRS - LAS
2 stops22h 42mLufthansa
Deal found 9/15$686
This United Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/304:01 pmSAN - TRS
2 stops22h 29mMultiple Airlines
Thu 11/66:25 amTRS - SAN
2 stops25h 04mMultiple Airlines
Deal found 9/15$686
This lol.travel deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/216:40 pmLAX - TRS
1 stop18h 55mMultiple Airlines
Tue 9/306:30 amTRS - LAX
1 stop15h 30mMultiple Airlines
Deal found 9/14$690
This Gurufare deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/288:45 amSJC - TRS
2 stops29h 55mMultiple Airlines
Tue 11/46:25 amTRS - SJC
2 stops23h 28mMultiple Airlines
Deal found 9/13$703
This Lufthansa deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1210:58 amFAT - TRS
2 stops18h 07mLufthansa
Sun 11/163:00 pmTRS - FAT
2 stops39h 53mLufthansa
Deal found 9/14$706
This Mytrip deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/3010:40 pmSFO - TRS
2 stops15h 50mLufthansa
Thu 11/66:25 amTRS - SFO
2 stops23h 40mLufthansa
Deal found 9/15$724
This ITA Airways deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure ITA Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/13:15 pmLAX - TRS
1 stop22h 40mITA Airways
Tue 10/76:35 amTRS - LAX
1 stop15h 40mITA Airways
Deal found 9/13$799

Cheapflights Fare Finder

 
Customize your flight search to find flights from California 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, Cheapflights users made 2,558,603 searches. Data last updated September 15, 2025.
Use the filters below to find and compare flights from California to Trieste that are best for you.

Fly from

California

Fly to

Trieste

Route

Depart

Return

Price

OntarioTrieste

ONT - TRS

ONTTRS

Ontario

Wed 11/12

7:05 am-6:30 pm

2 stops26h 25m

Trieste Ronchi dei Legionari

Sun 11/16

3:15 pm-11:04 pm

2 stops40h 49m

$603

Las VegasTrieste

LAS - TRS

LASTRS

Las Vegas Harry Reid Intl

Wed 10/29

2:45 pm-10:40 pm

1 stop23h 55m

Trieste Ronchi dei Legionari

Wed 11/5

2:40 pm-12:45 am

2 stops19h 05m

$611

San FranciscoTrieste

SFO - TRS

SFOTRS

San Francisco

Thu 10/30

2:35 pm-10:30 pm

1 stop23h 55m

Trieste Ronchi dei Legionari

Thu 11/6

6:25 am-5:50 pm

2 stops20h 25m

$682

Las VegasTrieste

LAS - TRS

LASTRS

Las Vegas Harry Reid Intl

Thu 10/30

11:07 am-10:30 pm

2 stops27h 23m

Trieste Ronchi dei Legionari

Thu 11/6

6:25 am-8:07 pm

2 stops22h 42m

$686

San DiegoTrieste

SAN - TRS

SANTRS

San Diego

Thu 10/30

4:01 pm-10:30 pm

2 stops22h 29m

Trieste Ronchi dei Legionari

Thu 11/6

6:25 am-10:29 pm

2 stops25h 04m

$686

San FranciscoTrieste

SFO - TRS

SFOTRS

San Francisco

Wed 3/4

2:40 pm-2:05 pm

1 stop14h 25m

Trieste Ronchi dei Legionari

Sun 3/8

3:00 pm-1:40 pm

1 stop30h 40m

$694

San JoseTrieste

SJC - TRS

SJCTRS

San Jose

Tue 10/28

8:45 am-10:40 pm

2 stops29h 55m

Trieste Ronchi dei Legionari

Tue 11/4

6:25 am-8:53 pm

2 stops23h 28m

$703

FresnoTrieste

FAT - TRS

FATTRS

Fresno Airterminal

Wed 11/12

10:58 am-10:40 pm

2 stops26h 42m

Trieste Ronchi dei Legionari

Sun 11/16

3:00 pm-5:58 pm

2 stops35h 58m

$706

SacramentoTrieste

SMF - TRS

SMFTRS

Sacramento Intl

Wed 2/25

10:55 am-10:40 pm

2 stops26h 45m

Trieste Ronchi dei Legionari

Sun 3/1

3:00 pm-10:35 pm

2 stops40h 35m

$708

San DiegoTrieste

SAN - TRS

SANTRS

San Diego

Thu 2/26

7:00 am-10:30 pm

2 stops30h 30m

Trieste Ronchi dei Legionari

Mon 3/2

2:40 pm-6:33 pm

2 stops36h 53m

$708

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 50 results
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Best time to book a flight from California to Trieste

Have a flexible travel schedule? Discover the best time to fly to Trieste from California with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from California to Trieste

What is the cheapest time of day to fly from CA to TRS?

Find hourly flight availability from California to Trieste. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 15, 2025.

When flying from California to Trieste, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Related info for your journey

Find useful and relevant information for your journey from California to Trieste. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Trieste from California?

    Located just 18.2 mi from the city center, Trieste Ronchi dei Legionari (TRS) is the airport most travelers will use when flying to Trieste from California.

  • How long is the flight from California to Trieste?

    Departing from California to Trieste will take you 22h 40m. Airlines will cover a distance of 6157 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from California to Trieste one-way?

    The cheapest airlines for a one-way flight from California to Trieste are ITA Airways ($544), Lufthansa ($650), and United Airlines ($870).

  • What are the most popular routes from California to Trieste?

    When deciding which route to take from California to Trieste consider San Francisco - Trieste Ronchi dei Legionari, Oakland - Trieste Ronchi dei Legionari or Los Angeles - Trieste Ronchi dei Legionari as they are the most popular.

  • Can I find deals for flights from California to Trieste that include hotel bookings?

    Yes. In addition to deals on California to Trieste flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from California to Trieste?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from California to Trieste.

  • Can I find deals for business class flights from California to Trieste?

    Yes. Cheapflights offers flight deals from California to Trieste by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

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Top 2 airlines flying from California to Trieste

Discover the top 2 airlines that operate flights from California to Trieste. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
ITA AirwaysCheapest$599Average$1,010FlexibilityNo cancel feeOn-time81%
LufthansaCheapest$663Average$1,211FlexibilityNo cancel feeOn-time76%

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