HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Trieste

$1,431+ Cheap flights from San Diego (SAN) to Trieste (TRS)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/22. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — TRS
Jan 3 — Jan 101
Sat 1/3
Sat 1/10
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from San Diego to Trieste with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from San Diego to Trieste

Best flights from San Diego to Trieste
Discover carefully curated flight deals from San Diego to Trieste that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 4, 2025.

This United Airlines deal was found by Cheapflights users on 12/3. 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 1/227:00 amSAN - TRS
2 stops18h 25mUnited Airlines
Mon 1/266:35 amTRS - SAN
2 stops42h 05mUnited Airlines
Deal found 12/3$1,431
This United Airlines deal was found by Cheapflights users on 12/2. 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.
Wed 1/147:00 amSAN - TRS
2 stops18h 25mUnited Airlines
Sun 1/186:35 amTRS - SAN
2 stops38h 18mUnited Airlines
Deal found 12/2$1,937

Find flight deals from San Diego to Trieste

Discover tips and strategies to find the most affordable flight options for your journey from San Diego (SAN) to Trieste (TRS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated December 4, 2025.

Round-trip from

$572
(Lufthansa)
From San Diego to Trieste Ronchi dei Legionari
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from San Diego 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 December 4, 2025.
Use the filters below to find and compare flights from San Diego to Trieste that are best for you.

Fly from

San Diego

Fly to

Trieste

Route

Depart

Return

Price

San DiegoTrieste

SAN - TRS

SANTRS

San Diego

Thu 1/22

7:00 am-10:25 am

2 stops18h 25m

Trieste Ronchi dei Legionari

Mon 1/26

6:35 am-3:40 pm

2 stops42h 05m

$1,431

San DiegoTrieste

SAN - TRS

SANTRS

San Diego

Wed 1/14

7:00 am-10:25 am

2 stops18h 25m

Trieste Ronchi dei Legionari

Sun 1/18

6:35 am-11:53 am

2 stops38h 18m

$1,937

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/3

Best time to book a flight from San Diego to Trieste

Have a flexible travel schedule? Discover the best time to fly to Trieste from San Diego 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 San Diego to Trieste

What is the cheapest month to book a flight from San Diego to Trieste?

Currently, February is the cheapest month in which you can book a flight from San Diego to Trieste (average of $394). Flying from San Diego to Trieste in June is currently the most expensive (average of $699). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Related info for your journey

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

  • How long is the flight from San Diego to Trieste?

    There are many flights that can get you from San Diego to Trieste in 18h 25m. Fly via United Airlines to get the fastest option. There are 6192 mi between San Diego and Trieste.

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

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

  • How can I find direct flights from San Diego to Trieste?

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

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

    Yes. Cheapflights offers flight deals from San Diego 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.

  • What is the cheapest month to book a flight from San Diego to Trieste?

    Currently, February is the cheapest month in which you can book a flight from San Diego to Trieste (average of $394). Flying from San Diego to Trieste in June is currently the most expensive (average of $699). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.