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$565+ Cheap flights from Trieste (TRS) to San Francisco (SFO)

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 6/24. Fares are subject to change and may not be available on all flights or dates of travel.
TRS — SFO
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
1 adult, Economy
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Cheap 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 January 29, 2026.

This lol.travel deal was found by Cheapflights users on 1/28. 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.
Mon 6/16:35 am
TRS
-
SFO
1 stop15h 40m
ITA Airways
Wed 6/173:15 pm
SFO
-
TRS
1 stop14h 15m
ITA Airways
Deal found 1/28$661
This Booking.com deal was found by Cheapflights users on 1/28. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/162:40 pm
TRS
-
SFO
1 stop14h 30m
Lufthansa
Sun 3/222:35 pm
SFO
-
TRS
1 stop23h 50m
Lufthansa
Deal found 1/28$662
This ITA Airways deal was found by Cheapflights users on 1/26. 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 9/236:35 am
TRS
-
SFO
1 stop15h 40m
ITA Airways
Sun 9/273:15 pm
SFO
-
TRS
1 stop14h 15m
ITA Airways
Deal found 1/26$683
This ITA Airways deal was found by Cheapflights users on 1/27. 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 9/56:35 am
TRS
-
SFO
1 stop15h 40m
ITA Airways
Sun 9/203:15 pm
SFO
-
TRS
1 stop14h 15m
ITA Airways
Deal found 1/27$713
This ITA Airways deal was found by Cheapflights users on 1/27. 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 9/56:35 am
TRS
-
SFO
2 stops20h 51m
ITA Airways
Sat 9/193:15 pm
SFO
-
TRS
1 stop14h 15m
ITA Airways
Deal found 1/27$718
This ITA Airways deal was found by Cheapflights users on 1/28. 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.
Sun 5/317:15 pm
TRS
-
SFO
1 stop27h 00m
ITA Airways
Wed 6/173:15 pm
SFO
-
TRS
1 stop18h 15m
ITA Airways
Deal found 1/28$723

Find 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 January 29, 2026.

Round-trip from

$661
(lol.travel)

One-way from

$565
(Kiwi.com)

Popular in

August

Cheapest in

October

Average price

$1,010
From Trieste Ronchi dei Legionari to San Francisco
Search Deals
One-way flight from Trieste Ronchi dei Legionari to San Francisco
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($92 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($24 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
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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 January 29, 2026.
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

Fri 3/13

6:25 am-4:55 pm

1 stop18h 30m

San Francisco

Fri 3/20

1:50 pm-2:05 pm

2 stops16h 15m

$732

TriesteSan Francisco

TRS - SFO

TRSSFO

Trieste Ronchi dei Legionari

Mon 3/16

2:40 pm-2:20 pm

2 stops31h 40m

San Francisco

Sun 3/22

10:40 pm-10:25 pm

2 stops15h 45m

$759

TriesteSan Francisco

TRS - SFO

TRSSFO

Trieste Ronchi dei Legionari

Mon 3/16

11:15 am-1:40 pm

3 stops34h 25m

San Francisco

Sun 3/22

8:25 pm-10:50 pm

2 stops18h 25m

$856

TriesteSan Francisco

TRS - SFO

TRSSFO

Trieste Ronchi dei Legionari

Mon 6/1

6:00 am-7:47 pm

2 stops22h 47m

San Francisco

Wed 6/17

4:30 pm-10:25 pm

1 stop20h 55m

$907

TriesteSan Francisco

TRS - SFO

TRSSFO

Trieste Ronchi dei Legionari

Mon 6/1

6:00 am-12:40 pm

1 stop15h 40m

San Francisco

Tue 6/16

2:40 pm-10:15 pm

1 stop22h 35m

$929

TriesteSan Francisco

TRS - SFO

TRSSFO

Trieste Ronchi dei Legionari

Wed 6/3

6:10 am-2:30 pm

1 stop17h 20m

San Francisco

Sun 6/14

4:30 pm-10:15 pm

1 stop20h 45m

$1,088

TriesteSan Francisco

TRS - SFO

TRSSFO

Trieste Ronchi dei Legionari

Fri 3/13

7:15 pm-3:45 pm

3 stops28h 30m

San Francisco

Fri 3/20

8:30 am-10:45 pm

3 stops30h 15m

$1,130

TriesteSan Francisco

TRS - SFO

TRSSFO

Trieste Ronchi dei Legionari

Thu 6/4

6:00 am-2:30 pm

1 stop17h 30m

San Francisco

Thu 6/18

4:30 pm-10:15 pm

1 stop20h 45m

$1,155

TriesteSan Francisco

TRS - SFO

TRSSFO

Trieste Ronchi dei Legionari

Wed 6/24

6:35 am-1:50 pm

2 stops40h 15m

$665

TriesteSan Francisco

TRS - SFO

TRSSFO

Trieste Ronchi dei Legionari

Wed 6/24

6:35 am-1:15 pm

1 stop15h 40m

$766

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/26

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, October is the cheapest month in which you can book a flight from Trieste to San Francisco (average of $449). Flying from Trieste to San Francisco in July is currently the most expensive (average of $663). 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.

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

Reviews of airlines servicing San Francisco

Get insights into the airlines that provide service to San Francisco. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to San Francisco. Reviews last updated January 29, 2026.
See what other customers who have flown with Lufthansa from Trieste to San Francisco have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Lufthansa
6.8
Okay
7,754 reviews

Overall

6.8

Food

6.3

Boarding

7.0

Comfort

6.8

Crew

7.6

Entertainment

6.4

Reviews

1 / 20
4.0
Okay

Djermouli,Dec 2025

FRA - SFO

I’m sorry the worst airline united food sales I’m diabetic plus high cholesterol pls seats it’s not comfortable plus screen tv broke I try to charge my phone don’t work I’m not flying with united airlines
Lufthansa
6.8
Okay
7,754 reviews
Lufthansa
6.8
Okay
7,754 reviews

Overall

6.8

Food

6.3

Boarding

7.0

Comfort

6.8

Crew

7.6

Entertainment

6.4

Reviews

1 / 20
4.0
Okay

Djermouli,Dec 2025

FRA - SFO

I’m sorry the worst airline united food sales I’m diabetic plus high cholesterol pls seats it’s not comfortable plus screen tv broke I try to charge my phone don’t work I’m not flying with united airlines

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 Lufthansa and ITA Airways fly from Trieste to San Francisco in about 18h 30m. The time it takes to get you to your destination can typically vary by up to 8h 30m. There are 6049 mi between Trieste and San Francisco. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What is the cheapest airline to fly from Trieste to San Francisco round-trip?

    Our cheapest airline available from Trieste to San Francisco is Lufthansa. Our recent data shows that you can find tickets from as low as $653 on this airline. Lufthansa is priced at 15% lower than the current average price of a flight leaving 3 months from now.

  • 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, October is the cheapest month in which you can book a flight from Trieste to San Francisco (average of $449). Flying from Trieste to San Francisco in July is currently the most expensive (average of $663). 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
South San Francisco
Santa Cruz
Roseville
Santa Clara
Livermore
Watsonville
San Bruno
Daly City
Sunnyvale
Turlock
Vacaville
San Carlos
San Ramon
Manteca
Vallejo
San Lorenzo
Davis
Hollister
Redwood City
Union City

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.

Top airline flying from Trieste to San Francisco

Discover the top airline that operate flights from Trieste to San Francisco. 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 January 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$653Average$781FlexibilityNo cancel feeOn-time76%

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