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: 14h 43m.

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

Flights via Rome (FCO) offer the lowest average round-trip price of $1,415.

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

Rome (FCO) was the most common stop: 78% 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: 2h 07m.

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 May 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.

$723 Cheap Flights from San Francisco to Trieste in 2026

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Find the cheapest flights from San Francisco to Trieste

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

2:40 pm - 10:15 pm

SFO

TRS

22h 35m

1 stop

6:15 am - 12:40 pm

TRS

SFO

15h 25m

1 stop

$965Lufthansa

Sun, Sep 13 - Thu, Oct 1

1:50 pm - 10:15 pm

SFO

TRS

23h 25m

2 stops

6:15 am - 12:40 pm

TRS

SFO

15h 25m

1 stop

$970Lufthansa

Tue, Sep 15 - Thu, Oct 1

2:40 pm - 10:25 pm

SFO

TRS

22h 45m

1 stop

2:40 pm - 12:34 am

TRS

SFO

18h 54m

2 stops

$975Lufthansa

Wed, Sep 16 - Fri, Oct 2

1:50 pm - 10:15 pm

SFO

TRS

23h 25m

2 stops

2:40 pm - 12:34 am

TRS

SFO

18h 54m

2 stops

$980Lufthansa

Tue, Sep 15 - Thu, Oct 1

4:25 pm - 1:45 pm

SFO

TRS

36h 20m

2 stops

6:15 am - 12:40 pm

TRS

SFO

15h 25m

1 stop

$981Lufthansa

Sat, Sep 19 - Thu, Oct 1

4:25 pm - 1:45 pm

SFO

TRS

36h 20m

2 stops

2:40 pm - 12:34 am

TRS

SFO

18h 54m

2 stops

$985Lufthansa

Sat, Sep 19 - Thu, Oct 1

2:40 pm - 10:15 pm

SFO

TRS

22h 35m

1 stop

2:50 pm - 12:40 pm

TRS

SFO

30h 50m

1 stop

$986Lufthansa

Sun, Sep 13 - Mon, Oct 5

1:50 pm - 10:15 pm

SFO

TRS

23h 25m

2 stops

2:50 pm - 12:40 pm

TRS

SFO

30h 50m

1 stop

$990Lufthansa

Tue, Sep 15 - Mon, Oct 5

4:25 pm - 1:45 pm

SFO

TRS

36h 20m

2 stops

2:50 pm - 12:40 pm

TRS

SFO

30h 50m

1 stop

$1,002Lufthansa

Sat, Sep 19 - Mon, Oct 5

3:15 pm - 2:30 pm

SFO

TRS

14h 15m

1 stop

6:35 am - 1:15 pm

TRS

SFO

15h 40m

1 stop

$1,004ITA Airways

Tue, Sep 15 - Fri, Oct 2

Lufthansa flights from San Francisco to Trieste

Our best Lufthansa deals on San Francisco to Trieste flight tickets

Lufthansa

Sep 13

SFO2:40 pmSan Francisco

22h 35m

1 stop

TRS10:15 pmTrieste Ronchi dei Legionari

Oct 1

TRS6:15 amTrieste Ronchi dei Legionari

15h 25m

1 stop

SFO12:40 pmSan Francisco

$965

Lufthansa

Sep 15

SFO1:50 pmSan Francisco

23h 25m

2 stops

TRS10:15 pmTrieste Ronchi dei Legionari

Oct 1

TRS6:15 amTrieste Ronchi dei Legionari

15h 25m

1 stop

SFO12:40 pmSan Francisco

$970

Lufthansa

Sep 16

SFO2:40 pmSan Francisco

22h 45m

1 stop

TRS10:25 pmTrieste Ronchi dei Legionari

Oct 2

TRS2:40 pmTrieste Ronchi dei Legionari

18h 54m

2 stops

SFO12:34 amSan Francisco

$975

ITA Airways flights from San Francisco to Trieste

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

ITA Airways

Sep 15

SFO3:15 pmSan Francisco

14h 15m

1 stop

TRS2:30 pmTrieste Ronchi dei Legionari

Oct 2

TRS6:35 amTrieste Ronchi dei Legionari

15h 40m

1 stop

SFO1:15 pmSan Francisco

$1,004

ITA Airways

Sep 15

SFO3:15 pmSan Francisco

18h 15m

1 stop

TRS6:30 pmTrieste Ronchi dei Legionari

Oct 5

TRS6:35 amTrieste Ronchi dei Legionari

15h 40m

1 stop

SFO1:15 pmSan Francisco

$1,054

ITA Airways

Sep 18

SFO3:15 pmSan Francisco

18h 15m

1 stop

TRS6:30 pmTrieste Ronchi dei Legionari

Oct 3

TRS6:35 amTrieste Ronchi dei Legionari

15h 40m

1 stop

SFO1:15 pmSan Francisco

$1,104

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

San FranciscoTrieste

SFO - TRS

SFOTRS

San Francisco

Sun 9/13

2:40 pm-10:15 pm

1 stop22h 35m

Trieste Ronchi dei Legionari

Thu 10/1

6:15 am-12:40 pm

1 stop15h 25m

$965

San FranciscoTrieste

SFO - TRS

SFOTRS

San Francisco

Tue 9/15

1:50 pm-10:15 pm

2 stops23h 25m

Trieste Ronchi dei Legionari

Thu 10/1

6:15 am-12:40 pm

1 stop15h 25m

$970

San FranciscoTrieste

SFO - TRS

SFOTRS

San Francisco

Wed 9/16

2:40 pm-10:25 pm

1 stop22h 45m

Trieste Ronchi dei Legionari

Fri 10/2

2:40 pm-12:34 am

2 stops18h 54m

$975

San FranciscoTrieste

SFO - TRS

SFOTRS

San Francisco

Tue 9/15

1:50 pm-10:15 pm

2 stops23h 25m

Trieste Ronchi dei Legionari

Thu 10/1

2:40 pm-12:34 am

2 stops18h 54m

$980

San FranciscoTrieste

SFO - TRS

SFOTRS

San Francisco

Sat 9/19

4:25 pm-1:45 pm

2 stops36h 20m

Trieste Ronchi dei Legionari

Thu 10/1

6:15 am-12:40 pm

1 stop15h 25m

$981

San FranciscoTrieste

SFO - TRS

SFOTRS

San Francisco

Sat 9/19

4:25 pm-1:45 pm

2 stops36h 20m

Trieste Ronchi dei Legionari

Thu 10/1

2:40 pm-12:34 am

2 stops18h 54m

$985

San FranciscoTrieste

SFO - TRS

SFOTRS

San Francisco

Sun 9/13

2:40 pm-10:15 pm

1 stop22h 35m

Trieste Ronchi dei Legionari

Mon 10/5

2:50 pm-12:40 pm

1 stop30h 50m

$986

San FranciscoTrieste

SFO - TRS

SFOTRS

San Francisco

Tue 9/15

1:50 pm-10:15 pm

2 stops23h 25m

Trieste Ronchi dei Legionari

Mon 10/5

2:50 pm-12:40 pm

1 stop30h 50m

$990

San FranciscoTrieste

SFO - TRS

SFOTRS

San Francisco

Sat 9/19

4:25 pm-1:45 pm

2 stops36h 20m

Trieste Ronchi dei Legionari

Mon 10/5

2:50 pm-12:40 pm

1 stop30h 50m

$1,002

Quickest round-trip

San FranciscoTrieste

SFO - TRS

SFOTRS

San Francisco

Tue 9/15

3:15 pm-2:30 pm

1 stop14h 15m

Trieste Ronchi dei Legionari

Fri 10/2

6:35 am-1:15 pm

1 stop15h 40m

$1,004

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 and SWISS are the most popular carriers operating from San Francisco to Trieste Ronchi dei Legionari

What airlines fly to Trieste?

United Airlines, Lufthansa and ITA Airways 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 31% 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.

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	14h 15m
Direct flights	None

The fastest flight from San Francisco to Trieste takes 14h 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 14h 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 May 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 (67% of total bookings). The next most popular airline is Lufthansa (33%).

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 $680	Free Cancellation	Rating 6.8 7,993 reviews		Search Lufthansa flights
ITA Airways	PriceFrom $729	Free Cancellation	Rating 6.7 1,213 reviews		Search ITA Airways flights

Udine

Grado

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.