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$555+ Cheap flights from Trieste (TRS) to San Francisco (SFO)

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 9/19. Fares are subject to change and may not be available on all flights or dates of travel.
TRS — SFO
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap flight deals from Trieste to San Francisco

Discover tips and strategies to find the most affordable flight options for your journey from Trieste (TRS) to San Francisco (SFO). 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 September 11, 2025.

Round-trip from

$636
(ITA Airways)

Popular in

September

Cheapest in

March

Average price

$1,346
From Trieste Ronchi dei Legionari to San Francisco
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Highest demand for flights based on searches. 19% potential increase in price ($188 potential increase over avg. RT price).
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Cheapest flight prices on average. 7% potential price decrease ($56 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Trieste to San Francisco

Cheapest flights from Trieste to San Francisco
Explore the most affordable flight options available from Trieste to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

This lol.travel deal was found by Cheapflights users on 9/10. 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.
Fri 9/196:35 amTRS - SFO
1 stop15h 50mITA Airways
Tue 9/233:15 pmSFO - TRS
1 stop14h 15mITA Airways
Deal found 9/10$555
This ITA Airways deal was found by Cheapflights users on 9/11. 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.
Sat 11/226:35 amTRS - SFO
1 stop15h 30mITA Airways
Sat 11/293:05 pmSFO - TRS
1 stop14h 25mITA Airways
Deal found 9/11$636
This Expedia deal was found by Cheapflights users on 9/10. 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.
Tue 9/236:30 amTRS - SFO
2 stops24h 10mMultiple Airlines
Thu 10/98:31 amSFO - TRS
2 stops28h 54mMultiple Airlines
Deal found 9/10$878
This Kiwi.com deal was found by Cheapflights users on 9/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/222:45 pmTRS - SFO
1 stop30h 55mMultiple Airlines
Thu 10/91:20 pmSFO - TRS
1 stop24h 05mMultiple Airlines
Deal found 9/10$897
This TAP AIR PORTUGAL deal was found by Cheapflights users on 9/11. 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 TAP AIR PORTUGAL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/2211:15 amTRS - SFO
2 stops60h 20mTAP AIR PORTUGAL
Sat 11/294:35 pmSFO - TRS
2 stops21h 20mTAP AIR PORTUGAL
Deal found 9/11$922

Cheapflights Fare Finder

 
Customize your flight search to find flights from Trieste to San Francisco 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 11, 2025.
Use the filters below to find and compare flights from Trieste to San Francisco that are best for you.

Fly from

Trieste

Fly to

San Francisco

Route

Depart

Return

Price

TriesteSan Francisco

TRS - SFO

TRSSFO

Trieste Ronchi dei Legionari

Thu 3/5

6:35 am-1:05 pm

1 stop15h 30m

San Francisco

Mon 3/9

4:05 pm-6:30 pm

1 stop18h 25m

$636

TriesteSan Francisco

TRS - SFO

TRSSFO

Trieste Ronchi dei Legionari

Sat 11/22

6:35 am-1:05 pm

1 stop15h 30m

San Francisco

Sat 11/29

3:05 pm-2:30 pm

1 stop14h 25m

$636

TriesteSan Francisco

TRS - SFO

TRSSFO

Trieste Ronchi dei Legionari

Thu 3/5

2:50 pm-8:00 pm

1 stop14h 10m

San Francisco

Mon 3/9

8:25 am-2:00 pm

2 stops21h 35m

$730

TriesteSan Francisco

TRS - SFO

TRSSFO

Trieste Ronchi dei Legionari

Tue 9/23

6:30 am-9:40 pm

2 stops24h 10m

San Francisco

Thu 10/9

8:31 am-10:25 pm

2 stops28h 54m

$878

TriesteSan Francisco

TRS - SFO

TRSSFO

Trieste Ronchi dei Legionari

Sat 11/8

6:35 am-1:05 pm

1 stop15h 30m

$660

TriesteSan Francisco

TRS - SFO

TRSSFO

Trieste Ronchi dei Legionari

Fri 11/7

11:15 am-2:45 pm

2 stops36h 30m

$705

TriesteSan Francisco

TRS - SFO

TRSSFO

Trieste Ronchi dei Legionari

Sun 11/9

3:15 pm-2:35 pm

2 stops32h 20m

$705

TriesteSan Francisco

TRS - SFO

TRSSFO

Trieste Ronchi dei Legionari

Sat 11/8

3:15 pm-2:35 pm

2 stops56h 20m

$712

TriesteSan Francisco

TRS - SFO

TRSSFO

Trieste Ronchi dei Legionari

Sat 9/27

7:15 pm-2:00 pm

2 stops51h 45m

$2,040

TriesteSan Francisco

TRS - SFO

TRSSFO

Trieste Ronchi dei Legionari

Sat 9/27

6:35 am-7:15 pm

1 stop21h 40m

$4,449

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/11

Best time to book a flight from Trieste to San Francisco

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

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

Currently, January is the cheapest month in which you can book a flight from Trieste to San Francisco (average of $276). Flying from Trieste to San Francisco in June is currently the most expensive (average of $357). 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.

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

Find hourly flight availability from Trieste to San Francisco. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 11, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 20% on flights from Trieste to San Francisco by exploring options for tickets in the morning.

How much does it cost to fly round-trip from Trieste to San Francisco?

Related info for your journey

Find useful and relevant information for your journey from Trieste to San Francisco. 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 Trieste to San Francisco?

    Airlines like ITA Airways fly from Trieste to San Francisco in about 15h 30m. The time it takes to get you to your destination can typically vary by up to . There are 6049 mi between Trieste and San Francisco.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Trieste to San Francisco 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 Trieste to San Francisco?

    Currently, January is the cheapest month in which you can book a flight from Trieste to San Francisco (average of $276). Flying from Trieste to San Francisco in June is currently the most expensive (average of $357). 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

Traveling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
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