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

Frankfurt am Main (FRA) was the most common stop: 61% of momondo users choosing 1-stop flights on this route connected there.

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

Rome (FCO) has the shortest average layover time for this route: 1h 50m.

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

Flights via Rome (FCO) offer the lowest average round-trip price of $1,177.

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

Flights connecting via Rome (FCO) have the shortest average one-way travel time: 15h 24m.

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 March 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.

$398 Cheap Flights from San Francisco to Trieste in 2026

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Find the cheapest flights from San Francisco to Trieste

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

4:30 pm - 10:15 pm

SFO

TRS

20h 45m

1 stop

2:40 pm - 2:30 pm

TRS

SFO

32h 50m

1 stop

$945Multiple Airlines

jeu., mai 7 - jeu., mai 14

4:30 pm - 10:15 pm

SFO

TRS

20h 45m

1 stop

6:10 am - 2:30 pm

TRS

SFO

17h 20m

1 stop

$952Multiple Airlines

jeu., sept. 3 - mer., sept. 16

12:02 pm - 1:55 pm

SFO

TRS

16h 53m

2 stops

6:10 am - 2:30 pm

TRS

SFO

17h 20m

1 stop

$980Multiple Airlines

jeu., sept. 3 - mer., sept. 16

7:04 am - 10:15 pm

SFO

TRS

30h 11m

2 stops

6:15 am - 7:56 pm

TRS

SFO

22h 41m

2 stops

$990Multiple Airlines

jeu., mai 7 - jeu., mai 14

3:15 pm - 6:30 pm

SFO

TRS

18h 15m

1 stop

7:15 pm - 1:15 pm

TRS

SFO

27h 00m

1 stop

$993ITA Airways

sam., sept. 19 - mer., sept. 23

4:30 pm - 10:15 pm

SFO

TRS

20h 45m

1 stop

6:15 am - 7:56 pm

TRS

SFO

22h 41m

2 stops

$1,000Multiple Airlines

jeu., mai 7 - jeu., mai 14

3:15 pm - 2:30 pm

SFO

TRS

14h 15m

1 stop

6:35 am - 1:15 pm

TRS

SFO

15h 40m

1 stop

$1,003ITA Airways

lun., sept. 14 - dim., sept. 27

4:30 pm - 2:30 pm

SFO

TRS

37h 00m

2 stops

11:15 am - 2:30 pm

TRS

SFO

36h 15m

2 stops

$1,006TAP AIR PORTUGAL

jeu., sept. 3 - mer., sept. 16

2:40 pm - 10:15 pm

SFO

TRS

22h 35m

1 stop

6:15 am - 12:32 am

TRS

SFO

27h 17m

2 stops

$1,092Lufthansa

dim., juil. 26 - sam., août 8

2:00 pm - 10:15 pm

SFO

TRS

23h 15m

2 stops

6:15 am - 12:32 am

TRS

SFO

27h 17m

2 stops

$1,097Lufthansa

dim., juil. 26 - sam., août 8

TAP AIR PORTUGAL flights from San Francisco to Trieste

Our best TAP AIR PORTUGAL deals on San Francisco to Trieste flight tickets

TAP AIR PORTUGAL

Sep 3

SFO4:30 pmSan Francisco

37h 00m

2 stops

TRS2:30 pmTrieste Ronchi dei Legionari

Sep 16

TRS11:15 amTrieste Ronchi dei Legionari

36h 15m

2 stops

SFO2:30 pmSan Francisco

$1,006

TAP AIR PORTUGAL

Sep 14

SFO4:30 pmSan Francisco

21h 25m

2 stops

TRS10:55 pmTrieste Ronchi dei Legionari

Sep 27

TRS11:15 amTrieste Ronchi dei Legionari

35h 50m

2 stops

SFO2:05 pmSan Francisco

$1,276

TAP AIR PORTUGAL

Jul 28

SFO7:20 pmSan Francisco

38h 10m

3 stops

TRS6:30 pmTrieste Ronchi dei Legionari

Aug 9

TRS11:15 amTrieste Ronchi dei Legionari

35h 50m

2 stops

SFO2:05 pmSan Francisco

$1,319

SWISS flights from San Francisco to Trieste

Our best SWISS deals on San Francisco to Trieste flight tickets

SWISS

Jul 26

SFO2:20 pmSan Francisco

43h 10m

2 stops

TRS6:30 pmTrieste Ronchi dei Legionari

Aug 9

TRS11:15 amTrieste Ronchi dei Legionari

38h 00m

2 stops

SFO4:15 pmSan Francisco

$1,415

SWISS

Jul 30

SFO2:20 pmSan Francisco

19h 10m

2 stops

TRS6:30 pmTrieste Ronchi dei Legionari

Aug 9

TRS11:15 amTrieste Ronchi dei Legionari

38h 00m

2 stops

SFO4:15 pmSan Francisco

$1,475

SWISS

Jun 30

SFO7:35 pmSan Francisco

37h 55m

2 stops

TRS6:30 pmTrieste Ronchi dei Legionari

Jul 7

TRS6:35 amTrieste Ronchi dei Legionari

18h 40m

2 stops

SFO4:15 pmSan Francisco

$1,802

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

San FranciscoTrieste

SFO - TRS

SFOTRS

San Francisco

jeu. 5/7

4:30 pm-10:15 pm

1 stop20h 45m

Trieste Ronchi dei Legionari

jeu. 5/14

2:40 pm-2:30 pm

1 stop32h 50m

$945

San FranciscoTrieste

SFO - TRS

SFOTRS

San Francisco

jeu. 9/3

4:30 pm-10:15 pm

1 stop20h 45m

Trieste Ronchi dei Legionari

mer. 9/16

6:10 am-2:30 pm

1 stop17h 20m

$952

San FranciscoTrieste

SFO - TRS

SFOTRS

San Francisco

jeu. 9/3

12:02 pm-1:55 pm

2 stops16h 53m

Trieste Ronchi dei Legionari

mer. 9/16

6:10 am-2:30 pm

1 stop17h 20m

$980

San FranciscoTrieste

SFO - TRS

SFOTRS

San Francisco

jeu. 5/7

7:04 am-10:15 pm

2 stops30h 11m

Trieste Ronchi dei Legionari

jeu. 5/14

6:15 am-7:56 pm

2 stops22h 41m

$990

San FranciscoTrieste

SFO - TRS

SFOTRS

San Francisco

sam. 9/19

3:15 pm-6:30 pm

1 stop18h 15m

Trieste Ronchi dei Legionari

mer. 9/23

7:15 pm-1:15 pm

1 stop27h 00m

$993

San FranciscoTrieste

SFO - TRS

SFOTRS

San Francisco

jeu. 5/7

4:30 pm-10:15 pm

1 stop20h 45m

Trieste Ronchi dei Legionari

jeu. 5/14

6:15 am-7:56 pm

2 stops22h 41m

$1,000

Quickest round-trip

San FranciscoTrieste

SFO - TRS

SFOTRS

San Francisco

lun. 9/14

3:15 pm-2:30 pm

1 stop14h 15m

Trieste Ronchi dei Legionari

dim. 9/27

6:35 am-1:15 pm

1 stop15h 40m

$1,003

San FranciscoTrieste

SFO - TRS

SFOTRS

San Francisco

jeu. 9/3

4:30 pm-2:30 pm

2 stops37h 00m

Trieste Ronchi dei Legionari

mer. 9/16

11:15 am-2:30 pm

2 stops36h 15m

$1,006

San FranciscoTrieste

SFO - TRS

SFOTRS

San Francisco

dim. 7/26

2:40 pm-10:15 pm

1 stop22h 35m

Trieste Ronchi dei Legionari

sam. 8/8

6:15 am-12:32 am

2 stops27h 17m

$1,092

San FranciscoTrieste

SFO - TRS

SFOTRS

San Francisco

dim. 7/26

2:00 pm-10:15 pm

2 stops23h 15m

Trieste Ronchi dei Legionari

sam. 8/8

6:15 am-12:32 am

2 stops27h 17m

$1,097

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 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

Airlines

Layovers

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

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

What airlines fly to Trieste?

United Airlines, ITA Airways and Lufthansa are the top three most popular airlines that fly to Trieste from San Francisco according to our data. United Airlines is the first choice among our users, with 30% of people opting to fly with this airline when traveling to Trieste. Keep in mind that there are 13 different airlines that fly to Trieste on a routine basis, so you have a few additional options to choose from.

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

Fastest flight time	18h 15m
Direct flights	None

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

How far is San Francisco to Trieste Ronchi dei Legionari by plane?
There are 6057.3 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 March 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 (60% of total bookings). The next most popular airline is Lufthansa (40%).

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 $693	Free Cancellation	Rating 6.8 7,864 reviews		Search Lufthansa flights
ITA Airways	PriceFrom $762	Free Cancellation	Rating 6.7 1,173 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.