Which layover airport offers the lowest fares from San Francisco to Trieste?

Flights via Rome (FCO) offer the lowest average round-trip price of $1,135.

Which layover airport has the shortest connection time from San Francisco to Trieste?

Frankfurt am Main (FRA) has the shortest average layover time for this route: 2h 45m.

Which airport is the most popular layover for flights between San Francisco and Trieste?

Rome (FCO) was the most common stop: 94% of momondo users choosing 1-stop flights on this route connected there.

What airlines fly to Trieste?

Condor, United Airlines and Lufthansa are the top three most popular airlines that fly to Trieste from San Francisco according to our data. Condor is the first choice among our users, with 43% of people opting to fly with this airline when traveling to Trieste. Keep in mind that there are 12 different airlines that fly to Trieste on a routine basis, so you have a few additional options to choose from.

What is the cheapest airline that flies from San Francisco to Trieste Ronchi dei Legionari?

ITA Airways is the most popular carrier operating from San Francisco to Trieste Ronchi dei Legionari

Which layover airport has the shortest travel time from San Francisco to Trieste?

Flights connecting via Frankfurt am Main (FRA) have the shortest average one-way travel time: 15h 00m.

When did momondo last update prices for flights from San Francisco Airport to Trieste Ronchi dei Legionari Airport?

Prices for flights from San Francisco Airport to Trieste Ronchi dei Legionari Airport are refreshed on a daily basis.

How many operators does momondo search for flights from San Francisco Airport to Trieste Ronchi dei Legionari Airport?

There are 2 operators available for flights from San Francisco Airport to Trieste Ronchi dei Legionari Airport as of October 2026.

How old do you have to be to fly from San Francisco Airport to Trieste Ronchi dei Legionari Airport?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from San Francisco Airport to Trieste Ronchi dei Legionari Airport.

What documentation or ID do you need to fly to Trieste Ronchi dei Legionari Airport?

The travel and health documents you'll need for your trip to Trieste Ronchi dei Legionari Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Trieste Ronchi dei Legionari Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$817 Cheap Flights from San Francisco to Trieste in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from San Francisco to Trieste

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3:05 pm - 10:25 amSFO San Francisco-TRS Trieste Ronchi dei Legionari

34h 20m1 stop Rome Fiumicino

6:35 am - 1:10 pmTRS Trieste Ronchi dei Legionari-SFO San Francisco

15h 35m1 stop Rome Fiumicino

$817ITA Airways

Tue, Nov 24 - Tue, Dec 1

9:59 am - 6:30 pmSFO San Francisco-TRS Trieste Ronchi dei Legionari

23h 31m2 stops Los Angeles Rome Fiumicino

6:35 am - 1:10 pmTRS Trieste Ronchi dei Legionari-SFO San Francisco

15h 35m1 stop Rome Fiumicino

$819Multiple Airlines

Tue, Nov 24 - Tue, Dec 1

9:00 am - 6:30 pmSFO San Francisco-TRS Trieste Ronchi dei Legionari

24h 30m2 stops Los Angeles Rome Fiumicino

6:35 am - 7:13 pmTRS Trieste Ronchi dei Legionari-SFO San Francisco

21h 38m2 stops Rome Fiumicino Los Angeles

$875Multiple Airlines

Tue, Nov 24 - Tue, Dec 1

3:05 pm - 2:30 pmSFO San Francisco-TRS Trieste Ronchi dei Legionari

14h 25m1 stop Rome Fiumicino

6:35 am - 1:10 pmTRS Trieste Ronchi dei Legionari-SFO San Francisco

15h 35m1 stop Rome Fiumicino

$1,009ITA Airways

Tue, Dec 15 - Thu, Dec 24

3:05 pm - 2:30 pmSFO San Francisco-TRS Trieste Ronchi dei Legionari

14h 25m1 stop Rome Fiumicino

6:35 am - 1:10 pmTRS Trieste Ronchi dei Legionari-SFO San Francisco

15h 35m1 stop Rome Fiumicino

$1,096ITA Airways

Tue, Dec 15 - Sun, Dec 27

3:05 pm - 10:55 pmSFO San Francisco-TRS Trieste Ronchi dei Legionari

22h 50m1 stop Rome Fiumicino

7:15 pm - 1:10 pmTRS Trieste Ronchi dei Legionari-SFO San Francisco

26h 55m1 stop Rome Fiumicino

$1,096ITA Airways

Tue, Dec 15 - Sat, Dec 26

9:40 pm - 6:30 pmSFO San Francisco-TRS Trieste Ronchi dei Legionari

35h 50m2 stops Munich Franz Josef Strauss Rome Fiumicino

3:15 pm - 4:30 pmTRS Trieste Ronchi dei Legionari-SFO San Francisco

58h 15m2 stops Rome Fiumicino Zurich

$1,103Multiple Airlines

Sun, Nov 22 - Sun, Nov 29

9:40 pm - 10:55 pmSFO San Francisco-TRS Trieste Ronchi dei Legionari

40h 15m2 stops Munich Franz Josef Strauss Rome Fiumicino

11:15 am - 7:35 pmTRS Trieste Ronchi dei Legionari-SFO San Francisco

17h 20m2 stops Rome Fiumicino Munich Franz Josef Strauss

$1,364Lufthansa

Tue, Dec 15 - Fri, Dec 25

9:40 pm - 2:30 pmSFO San Francisco-TRS Trieste Ronchi dei Legionari

31h 50m2 stops Munich Franz Josef Strauss Rome Fiumicino

3:15 pm - 2:50 pmTRS Trieste Ronchi dei Legionari-SFO San Francisco

56h 35m2 stops Rome Fiumicino Munich Franz Josef Strauss

$1,374Lufthansa

Tue, Dec 15 - Sun, Jan 10

9:40 pm - 2:30 pmSFO San Francisco-TRS Trieste Ronchi dei Legionari

31h 50m2 stops Munich Franz Josef Strauss Rome Fiumicino

11:15 am - 2:50 pmTRS Trieste Ronchi dei Legionari-SFO San Francisco

36h 35m2 stops Rome Fiumicino Munich Franz Josef Strauss

$1,414Lufthansa

Tue, Dec 15 - Sat, Jan 9

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Lufthansa flights from San Francisco to Trieste

Our best Lufthansa deals on San Francisco to Trieste flight tickets

Lufthansa

Dec 15

SFO9:40 pmSan Francisco

40h 15m

2 stops

TRS10:55 pmTrieste Ronchi dei Legionari

Dec 25

TRS11:15 amTrieste Ronchi dei Legionari

17h 20m

2 stops

SFO7:35 pmSan Francisco

$1,364

Lufthansa

Dec 15

SFO9:40 pmSan Francisco

31h 50m

2 stops

TRS2:30 pmTrieste Ronchi dei Legionari

Jan 10

TRS3:15 pmTrieste Ronchi dei Legionari

56h 35m

2 stops

SFO2:50 pmSan Francisco

$1,374

ITA Airways flights from San Francisco to Trieste

Our best ITA Airways deals on San Francisco to Trieste flight tickets

ITA Airways

Nov 24

SFO3:05 pmSan Francisco

34h 20m

1 stop

TRS10:25 amTrieste Ronchi dei Legionari

Dec 1

TRS6:35 amTrieste Ronchi dei Legionari

15h 35m

1 stop

SFO1:10 pmSan Francisco

$817

ITA Airways

Dec 15

SFO3:05 pmSan Francisco

14h 25m

1 stop

TRS2:30 pmTrieste Ronchi dei Legionari

Dec 24

TRS6:35 amTrieste Ronchi dei Legionari

15h 35m

1 stop

SFO1:10 pmSan Francisco

$1,009

ITA Airways

Dec 15

SFO3:05 pmSan Francisco

22h 50m

1 stop

TRS10:55 pmTrieste Ronchi dei Legionari

Dec 26

TRS7:15 pmTrieste Ronchi dei Legionari

26h 55m

1 stop

SFO1:10 pmSan Francisco

$1,096

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

San FranciscoTrieste

SFO San Francisco - TRS Trieste Ronchi dei Legionari

SFOTRS

San Francisco

Tue 11/24

3:05 pm-10:25 am

1 stop34h 20m

Trieste Ronchi dei Legionari

Tue 12/1

6:35 am-1:10 pm

1 stop15h 35m

$817

San FranciscoTrieste

SFO San Francisco - TRS Trieste Ronchi dei Legionari

SFOTRS

San Francisco

Tue 11/24

9:59 am-6:30 pm

2 stops23h 31m

Trieste Ronchi dei Legionari

Tue 12/1

6:35 am-1:10 pm

1 stop15h 35m

$819

San FranciscoTrieste

SFO San Francisco - TRS Trieste Ronchi dei Legionari

SFOTRS

San Francisco

Tue 11/24

9:00 am-6:30 pm

2 stops24h 30m

Trieste Ronchi dei Legionari

Tue 12/1

6:35 am-7:13 pm

2 stops21h 38m

$875

Quickest round-trip

San FranciscoTrieste

SFO San Francisco - TRS Trieste Ronchi dei Legionari

SFOTRS

San Francisco

Tue 12/15

3:05 pm-2:30 pm

1 stop14h 25m

Trieste Ronchi dei Legionari

Thu 12/24

6:35 am-1:10 pm

1 stop15h 35m

$1,009

San FranciscoTrieste

SFO San Francisco - TRS Trieste Ronchi dei Legionari

SFOTRS

San Francisco

Tue 12/15

3:05 pm-2:30 pm

1 stop14h 25m

Trieste Ronchi dei Legionari

Sun 12/27

6:35 am-1:10 pm

1 stop15h 35m

$1,096

San FranciscoTrieste

SFO San Francisco - TRS Trieste Ronchi dei Legionari

SFOTRS

San Francisco

Tue 12/15

3:05 pm-10:55 pm

1 stop22h 50m

Trieste Ronchi dei Legionari

Sat 12/26

7:15 pm-1:10 pm

1 stop26h 55m

$1,096

San FranciscoTrieste

SFO San Francisco - TRS Trieste Ronchi dei Legionari

SFOTRS

San Francisco

Sun 11/22

9:40 pm-6:30 pm

2 stops35h 50m

Trieste Ronchi dei Legionari

Sun 11/29

3:15 pm-4:30 pm

2 stops58h 15m

$1,103

San FranciscoTrieste

SFO San Francisco - TRS Trieste Ronchi dei Legionari

SFOTRS

San Francisco

Tue 12/15

9:40 pm-10:55 pm

2 stops40h 15m

Trieste Ronchi dei Legionari

Fri 12/25

11:15 am-7:35 pm

2 stops17h 20m

$1,364

San FranciscoTrieste

SFO San Francisco - TRS Trieste Ronchi dei Legionari

SFOTRS

San Francisco

Tue 12/15

9:40 pm-2:30 pm

2 stops31h 50m

Trieste Ronchi dei Legionari

Sun 1/10

3:15 pm-2:50 pm

2 stops56h 35m

$1,374

San FranciscoTrieste

SFO San Francisco - TRS Trieste Ronchi dei Legionari

SFOTRS

San Francisco

Tue 12/15

9:40 pm-2:30 pm

2 stops31h 50m

Trieste Ronchi dei Legionari

Sat 1/9

11:15 am-2:50 pm

2 stops36h 35m

$1,414

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 15 resultsSorted by cheapest first

How to get the cheapest flight ticket from San Francisco to Trieste

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

Layovers

Can stopping save me money on San Francisco to Trieste flights?

You could potentially save up to 35% on your flight if you consider stops on a San Francisco to Trieste flight.

When to book flights from San Francisco to Trieste

Are you open to changing your travel dates? Check out the ideal times to fly from San Francisco to Trieste according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap San Francisco to Trieste (SFO to TRS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from San Francisco to Trieste

Best Price Found	$1,468
Fastest flight time	18h 15m
Direct flights	None

The best one-way flight to Trieste from San Francisco in the past 72 hours is $1,468. The best round-trip flight deal from San Francisco to Trieste found on momondo in the last 72 hours is $817.

The fastest flight from San Francisco to Trieste takes 18h 15m

There are no direct flights from San Francisco to Trieste. There are no popular flight routes from San Francisco to Trieste.

Search flight deals

Frequently asked questions about flying from San Francisco to Trieste

How far is San Francisco to Trieste Ronchi dei Legionari by plane?
There are 6057.7 mi between San Francisco and Trieste Ronchi dei Legionari. A reasonable flight in good conditions will take 18h 15m.
When did momondo last update prices for flights from San Francisco Airport to Trieste Ronchi dei Legionari Airport?
Prices for flights from San Francisco Airport to Trieste Ronchi dei Legionari Airport are refreshed on a daily basis.
How many operators does momondo search for flights from San Francisco Airport to Trieste Ronchi dei Legionari Airport?
There are 2 operators available for flights from San Francisco Airport to Trieste Ronchi dei Legionari Airport as of October 2026.
How old do you have to be to fly from San Francisco Airport to Trieste Ronchi dei Legionari Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from San Francisco Airport to Trieste Ronchi dei Legionari Airport.
What documentation or ID do you need to fly to Trieste Ronchi dei Legionari Airport?
The travel and health documents you'll need for your trip to Trieste Ronchi dei Legionari Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Trieste Ronchi dei Legionari Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from San Francisco to Trieste?
Based on momondo bookings for this flight route, the most popular airline on flight routes from San Francisco to Trieste is ITA Airways (77% of total bookings). The next most popular airline is Lufthansa (23%).

Best airlines flying from San Francisco to Trieste

Compare and see reviews for airlines that fly from San Francisco to Trieste with momondo

Airline	Rating	Free Cancellation	Price
Lufthansa	PriceFrom $499	Free Cancellation	Rating 6.8 8,269 reviews		Search Lufthansa flights
ITA Airways	PriceFrom $761	Free Cancellation	Rating 6.8 1,390 reviews		Search ITA Airways flights

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Why use momondo?

Why should I use momondo to find a flight deal from San Francisco to Trieste?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from San Francisco to Trieste for you.

Can I find flights from San Francisco to Trieste with flexible booking policies on momondo?

Yes. All flights to Trieste from San Francisco on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from San Francisco to Trieste?

Once all potential San Francisco to Trieste flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from San Francisco to Trieste right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Trieste, momondo offers a useful price alert feature which will track prices for flights to Trieste from San Francisco and alert you when they change.