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 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.

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.

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 July 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.

$393 Cheap Flights from San Francisco to Trieste in 2026

Discover deals from 900+ travel sites with momondo.

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.

6:20 pm - 6:30 pm

SFO

TRS

39h 10m

2 stops

3:15 pm - 1:05 pm

TRS

SFO

30h 50m

1 stop

$744Multiple Airlines

Sat, Nov 7 - Mon, Nov 16

3:15 pm - 6:30 pm

SFO

TRS

18h 15m

1 stop

7:15 pm - 1:15 pm

TRS

SFO

27h 00m

1 stop

$766ITA Airways

Mon, Aug 17 - Mon, Aug 24

3:05 pm - 10:25 am

SFO

TRS

34h 20m

1 stop

11:15 am - 1:05 pm

TRS

SFO

34h 50m

1 stop

$825ITA Airways

Sat, Nov 7 - Mon, Nov 16

4:30 pm - 6:30 pm

SFO

TRS

17h 00m

2 stops

7:15 pm - 2:30 pm

TRS

SFO

28h 15m

2 stops

$842Multiple Airlines

Mon, Aug 17 - Mon, Aug 24

3:15 pm - 10:55 pm

SFO

TRS

22h 40m

1 stop

3:15 pm - 1:15 pm

TRS

SFO

31h 00m

1 stop

$864ITA Airways

Mon, Sep 21 - Sun, Sep 27

3:15 pm - 2:30 pm

SFO

TRS

14h 15m

1 stop

7:15 pm - 6:50 pm

TRS

SFO

32h 35m

2 stops

$865Multiple Airlines

Wed, Sep 30 - Mon, Oct 5

10:06 am - 6:30 pm

SFO

TRS

23h 24m

2 stops

11:15 am - 1:15 pm

TRS

SFO

35h 00m

1 stop

$868Multiple Airlines

Mon, Sep 21 - Sun, Sep 27

10:06 am - 2:30 pm

SFO

TRS

19h 24m

2 stops

3:15 pm - 6:50 pm

TRS

SFO

36h 35m

2 stops

$869Multiple Airlines

Wed, Sep 30 - Mon, Oct 5

7:00 am - 2:30 pm

SFO

TRS

22h 30m

2 stops

6:35 am - 10:54 am

TRS

SFO

37h 19m

2 stops

$888KLM

Mon, Nov 9 - Mon, Nov 16

2:40 pm - 1:55 pm

SFO

TRS

14h 15m

1 stop

6:10 am - 7:00 pm

TRS

SFO

21h 50m

2 stops

$906Multiple Airlines

Mon, Aug 17 - Mon, Aug 24

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ITA Airways flights from San Francisco to Trieste

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

ITA Airways

Aug 17

SFO3:15 pmSan Francisco

18h 15m

1 stop

TRS6:30 pmTrieste Ronchi dei Legionari

Aug 24

TRS7:15 pmTrieste Ronchi dei Legionari

27h 00m

1 stop

SFO1:15 pmSan Francisco

$766

ITA Airways

Nov 7

SFO3:05 pmSan Francisco

34h 20m

1 stop

TRS10:25 amTrieste Ronchi dei Legionari

Nov 16

TRS11:15 amTrieste Ronchi dei Legionari

34h 50m

1 stop

SFO1:05 pmSan Francisco

$825

ITA Airways

Sep 21

SFO3:15 pmSan Francisco

22h 40m

1 stop

TRS10:55 pmTrieste Ronchi dei Legionari

Sep 27

TRS3:15 pmTrieste Ronchi dei Legionari

31h 00m

1 stop

SFO1:15 pmSan Francisco

$864

Lufthansa flights from San Francisco to Trieste

Our best Lufthansa deals on San Francisco to Trieste flight tickets

Lufthansa

Aug 28

SFO9:06 pmSan Francisco

40h 09m

2 stops

TRS10:15 pmTrieste Ronchi dei Legionari

Sep 7

TRS2:50 pmTrieste Ronchi dei Legionari

30h 50m

1 stop

SFO12:40 pmSan Francisco

$959

Lufthansa

Oct 1

SFO2:40 pmSan Francisco

22h 35m

1 stop

TRS10:15 pmTrieste Ronchi dei Legionari

Oct 7

TRS6:10 amTrieste Ronchi dei Legionari

15h 30m

1 stop

SFO12:40 pmSan Francisco

$1,001

Lufthansa

Aug 28

SFO9:06 pmSan Francisco

40h 09m

2 stops

TRS10:15 pmTrieste Ronchi dei Legionari

Sep 7

TRS6:10 amTrieste Ronchi dei Legionari

21h 50m

2 stops

SFO7:00 pmSan Francisco

$1,025

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

San FranciscoTrieste

SFO - TRS

SFOTRS

San Francisco

Sat 11/7

6:20 pm-6:30 pm

2 stops39h 10m

Trieste Ronchi dei Legionari

Mon 11/16

3:15 pm-1:05 pm

1 stop30h 50m

$744

San FranciscoTrieste

SFO - TRS

SFOTRS

San Francisco

Mon 8/17

3:15 pm-6:30 pm

1 stop18h 15m

Trieste Ronchi dei Legionari

Mon 8/24

7:15 pm-1:15 pm

1 stop27h 00m

$766

San FranciscoTrieste

SFO - TRS

SFOTRS

San Francisco

Sat 11/7

3:05 pm-10:25 am

1 stop34h 20m

Trieste Ronchi dei Legionari

Mon 11/16

11:15 am-1:05 pm

1 stop34h 50m

$825

San FranciscoTrieste

SFO - TRS

SFOTRS

San Francisco

Mon 8/17

4:30 pm-6:30 pm

2 stops17h 00m

Trieste Ronchi dei Legionari

Mon 8/24

7:15 pm-2:30 pm

2 stops28h 15m

$842

San FranciscoTrieste

SFO - TRS

SFOTRS

San Francisco

Mon 9/21

3:15 pm-10:55 pm

1 stop22h 40m

Trieste Ronchi dei Legionari

Sun 9/27

3:15 pm-1:15 pm

1 stop31h 00m

$864

San FranciscoTrieste

SFO - TRS

SFOTRS

San Francisco

Wed 9/30

3:15 pm-2:30 pm

1 stop14h 15m

Trieste Ronchi dei Legionari

Mon 10/5

7:15 pm-6:50 pm

2 stops32h 35m

$865

San FranciscoTrieste

SFO - TRS

SFOTRS

San Francisco

Mon 9/21

10:06 am-6:30 pm

2 stops23h 24m

Trieste Ronchi dei Legionari

Sun 9/27

11:15 am-1:15 pm

1 stop35h 00m

$868

San FranciscoTrieste

SFO - TRS

SFOTRS

San Francisco

Wed 9/30

10:06 am-2:30 pm

2 stops19h 24m

Trieste Ronchi dei Legionari

Mon 10/5

3:15 pm-6:50 pm

2 stops36h 35m

$869

San FranciscoTrieste

SFO - TRS

SFOTRS

San Francisco

Mon 11/9

7:00 am-2:30 pm

2 stops22h 30m

Trieste Ronchi dei Legionari

Mon 11/16

6:35 am-10:54 am

2 stops37h 19m

$888

Quickest round-trip

San FranciscoTrieste

SFO - TRS

SFOTRS

San Francisco

Mon 8/17

2:40 pm-1:55 pm

1 stop14h 15m

Trieste Ronchi dei Legionari

Mon 8/24

6:10 am-7:00 pm

2 stops21h 50m

$906

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?

KLM, Lufthansa, and ITA Airways are the most popular carriers operating from San Francisco to Trieste Ronchi dei Legionari

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 34% 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	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.

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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 July 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 (65% of total bookings). The next most popular airline is Lufthansa (35%).

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 8,108 reviews		Search Lufthansa flights
ITA Airways	PriceFrom $729	Free Cancellation	Rating 6.7 1,273 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.