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

Rome (FCO) was the most common stop: 89% of momondo users choosing 1-stop flights on this route connected there.

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

Flights via Rome (FCO) offer the lowest average round-trip price of $1,122.

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 15m.

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.

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 August 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.

$437 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 - 2:30 pmSFO San Francisco-TRS Trieste Ronchi dei Legionari

35h 10m2 stops Los Angeles Rome Fiumicino

6:35 am - 1:05 pmTRS Trieste Ronchi dei Legionari-SFO San Francisco

15h 30m1 stop Rome Fiumicino

$803Multiple Airlines

Sat, Nov 7 - Tue, Nov 17

6:20 pm - 2:30 pmSFO San Francisco-TRS Trieste Ronchi dei Legionari

35h 10m2 stops Los Angeles Rome Fiumicino

7:15 pm - 9:12 pmTRS Trieste Ronchi dei Legionari-SFO San Francisco

34h 57m2 stops Rome Fiumicino Los Angeles

$808Multiple Airlines

Sat, Nov 7 - Tue, Nov 17

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

34h 20m1 stop Rome Fiumicino

6:35 am - 1:05 pmTRS Trieste Ronchi dei Legionari-SFO San Francisco

15h 30m1 stop Rome Fiumicino

$850ITA Airways

Sat, Nov 7 - Tue, Nov 17

3:15 pm - 10:25 amSFO San Francisco-TRS Trieste Ronchi dei Legionari

34h 10m1 stop Rome Fiumicino

6:35 am - 1:15 pmTRS Trieste Ronchi dei Legionari-SFO San Francisco

15h 40m1 stop Rome Fiumicino

$858ITA Airways

Wed, Sep 23 - Wed, Oct 14

3:15 pm - 2:30 pmSFO San Francisco-TRS Trieste Ronchi dei Legionari

14h 15m1 stop Rome Fiumicino

6:35 am - 1:15 pmTRS Trieste Ronchi dei Legionari-SFO San Francisco

15h 40m1 stop Rome Fiumicino

$867ITA Airways

Wed, Sep 30 - Wed, Oct 7

10:06 am - 2:30 pmSFO San Francisco-TRS Trieste Ronchi dei Legionari

19h 24m2 stops Los Angeles Rome Fiumicino

6:35 am - 1:15 pmTRS Trieste Ronchi dei Legionari-SFO San Francisco

15h 40m1 stop Rome Fiumicino

$871Multiple Airlines

Wed, Sep 23 - Wed, Oct 14

3:15 pm - 10:25 amSFO San Francisco-TRS Trieste Ronchi dei Legionari

34h 10m1 stop Rome Fiumicino

7:15 pm - 6:50 pmTRS Trieste Ronchi dei Legionari-SFO San Francisco

32h 35m2 stops Rome Fiumicino Los Angeles

$907Multiple Airlines

Wed, Sep 16 - Mon, Oct 5

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

22h 15m2 stops Chicago O'Hare Intl Frankfurt am Main

6:20 am - 12:40 pmTRS Trieste Ronchi dei Legionari-SFO San Francisco

15h 20m1 stop Frankfurt am Main

$1,012Lufthansa

Wed, Sep 16 - Tue, Oct 6

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

22h 15m2 stops Chicago O'Hare Intl Frankfurt am Main

6:20 am - 12:40 pmTRS Trieste Ronchi dei Legionari-SFO San Francisco

15h 20m1 stop Frankfurt am Main

$1,012Lufthansa

Mon, Sep 21 - Tue, Oct 20

3:10 pm - 10:15 pmSFO San Francisco-TRS Trieste Ronchi dei Legionari

22h 05m2 stops Chicago O'Hare Intl Frankfurt am Main

6:20 am - 12:40 pmTRS Trieste Ronchi dei Legionari-SFO San Francisco

15h 20m1 stop Frankfurt am Main

$1,012Lufthansa

Tue, Sep 22 - Tue, Oct 20

Cheap last minute flights

Enter your travel dates to find the best prices.

3:15 pm - 10:55 pmSFO San Francisco-TRS Trieste Ronchi dei Legionari

22h 40m1 stop Rome Fiumicino

11:15 am - 1:15 pmTRS Trieste Ronchi dei Legionari-SFO San Francisco

35h 00m1 stop Rome Fiumicino

$807ITA Airways

Thu, Aug 20 - Thu, Aug 27

3:15 pm - 10:25 amSFO San Francisco-TRS Trieste Ronchi dei Legionari

34h 10m1 stop Rome Fiumicino

6:35 am - 1:15 pmTRS Trieste Ronchi dei Legionari-SFO San Francisco

15h 40m1 stop Rome Fiumicino

$807ITA Airways

Thu, Aug 20 - Wed, Aug 26

3:15 pm - 10:55 pmSFO San Francisco-TRS Trieste Ronchi dei Legionari

22h 40m1 stop Rome Fiumicino

6:35 am - 1:15 pmTRS Trieste Ronchi dei Legionari-SFO San Francisco

15h 40m1 stop Rome Fiumicino

$849ITA Airways

Fri, Aug 21 - Wed, Aug 26

3:15 pm - 10:55 pmSFO San Francisco-TRS Trieste Ronchi dei Legionari

22h 40m1 stop Rome Fiumicino

6:35 am - 1:15 pmTRS Trieste Ronchi dei Legionari-SFO San Francisco

15h 40m1 stop Rome Fiumicino

$851ITA Airways

Fri, Aug 21 - Wed, Aug 26

2:40 pm - 9:55 pmSFO San Francisco-TRS Trieste Ronchi dei Legionari

22h 15m1 stop Frankfurt am Main

6:10 am - 5:23 pmTRS Trieste Ronchi dei Legionari-SFO San Francisco

20h 13m2 stops Frankfurt am Main Chicago O'Hare Intl

$857Lufthansa

Fri, Aug 21 - Wed, Aug 26

2:40 pm - 1:55 pmSFO San Francisco-TRS Trieste Ronchi dei Legionari

14h 15m1 stop Frankfurt am Main

2:40 pm - 12:16 amTRS Trieste Ronchi dei Legionari-SFO San Francisco

18h 36m2 stops Frankfurt am Main Chicago O'Hare Intl

$859Lufthansa

Thu, Aug 20 - Thu, Aug 27

2:40 pm - 9:55 pmSFO San Francisco-TRS Trieste Ronchi dei Legionari

22h 15m1 stop Frankfurt am Main

6:10 am - 5:23 pmTRS Trieste Ronchi dei Legionari-SFO San Francisco

20h 13m2 stops Frankfurt am Main Chicago O'Hare Intl

$867Lufthansa

Fri, Aug 21 - Wed, Aug 26

2:40 pm - 10:15 pmSFO San Francisco-TRS Trieste Ronchi dei Legionari

22h 35m1 stop Frankfurt am Main

6:15 am - 7:49 pmTRS Trieste Ronchi dei Legionari-SFO San Francisco

22h 34m2 stops Frankfurt am Main Vancouver Intl

$873Multiple Airlines

Thu, Aug 20 - Thu, Aug 27

2:40 pm - 10:15 pmSFO San Francisco-TRS Trieste Ronchi dei Legionari

22h 35m1 stop Frankfurt am Main

6:15 am - 12:40 pmTRS Trieste Ronchi dei Legionari-SFO San Francisco

15h 25m1 stop Frankfurt am Main

$873Multiple Airlines

Thu, Aug 20 - Thu, Aug 27

8:00 am - 6:30 pmSFO San Francisco-TRS Trieste Ronchi dei Legionari

25h 30m2 stops Atlanta Hartsfield-Jackson Rome Fiumicino

6:35 am - 11:58 pmTRS Trieste Ronchi dei Legionari-SFO San Francisco

26h 23m2 stops Rome Fiumicino Atlanta Hartsfield-Jackson

$989KLM

Thu, Aug 20 - Thu, Aug 27

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Lufthansa flights from San Francisco to Trieste

Our best Lufthansa deals on San Francisco to Trieste flight tickets

Lufthansa

Aug 21

SFO2:40 pmSan Francisco

22h 15m

1 stop

TRS9:55 pmTrieste Ronchi dei Legionari

Aug 26

TRS6:10 amTrieste Ronchi dei Legionari

20h 13m

2 stops

SFO5:23 pmSan Francisco

$857

Lufthansa

Aug 20

SFO2:40 pmSan Francisco

14h 15m

1 stop

TRS1:55 pmTrieste Ronchi dei Legionari

Aug 27

TRS2:40 pmTrieste Ronchi dei Legionari

18h 36m

2 stops

SFO12:16 amSan Francisco

$859

Lufthansa

Aug 21

SFO2:40 pmSan Francisco

22h 15m

1 stop

TRS9:55 pmTrieste Ronchi dei Legionari

Aug 26

TRS6:10 amTrieste Ronchi dei Legionari

20h 13m

2 stops

SFO5:23 pmSan Francisco

$867

ITA Airways flights from San Francisco to Trieste

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

ITA Airways

Aug 20

SFO3:15 pmSan Francisco

22h 40m

1 stop

TRS10:55 pmTrieste Ronchi dei Legionari

Aug 27

TRS11:15 amTrieste Ronchi dei Legionari

35h 00m

1 stop

SFO1:15 pmSan Francisco

$807

ITA Airways

Aug 21

SFO3:15 pmSan Francisco

22h 40m

1 stop

TRS10:55 pmTrieste Ronchi dei Legionari

Aug 26

TRS6:35 amTrieste Ronchi dei Legionari

15h 40m

1 stop

SFO1:15 pmSan Francisco

$849

ITA Airways

Nov 7

SFO3:05 pmSan Francisco

34h 20m

1 stop

TRS10:25 amTrieste Ronchi dei Legionari

Nov 17

TRS6:35 amTrieste Ronchi dei Legionari

15h 30m

1 stop

SFO1:05 pmSan Francisco

$850

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

San FranciscoTrieste

SFO San Francisco - TRS Trieste Ronchi dei Legionari

SFOTRS

San Francisco

Sat 11/7

6:20 pm-2:30 pm

2 stops35h 10m

Trieste Ronchi dei Legionari

Tue 11/17

6:35 am-1:05 pm

1 stop15h 30m

$803

San FranciscoTrieste

SFO San Francisco - TRS Trieste Ronchi dei Legionari

SFOTRS

San Francisco

Sat 11/7

6:20 pm-2:30 pm

2 stops35h 10m

Trieste Ronchi dei Legionari

Tue 11/17

7:15 pm-9:12 pm

2 stops34h 57m

$808

San FranciscoTrieste

SFO San Francisco - TRS Trieste Ronchi dei Legionari

SFOTRS

San Francisco

Sat 11/7

3:05 pm-10:25 am

1 stop34h 20m

Trieste Ronchi dei Legionari

Tue 11/17

6:35 am-1:05 pm

1 stop15h 30m

$850

San FranciscoTrieste

SFO San Francisco - TRS Trieste Ronchi dei Legionari

SFOTRS

San Francisco

Wed 9/23

3:15 pm-10:25 am

1 stop34h 10m

Trieste Ronchi dei Legionari

Wed 10/14

6:35 am-1:15 pm

1 stop15h 40m

$858

Quickest round-trip

San FranciscoTrieste

SFO San Francisco - TRS Trieste Ronchi dei Legionari

SFOTRS

San Francisco

Wed 9/30

3:15 pm-2:30 pm

1 stop14h 15m

Trieste Ronchi dei Legionari

Wed 10/7

6:35 am-1:15 pm

1 stop15h 40m

$867

San FranciscoTrieste

SFO San Francisco - TRS Trieste Ronchi dei Legionari

SFOTRS

San Francisco

Wed 9/23

10:06 am-2:30 pm

2 stops19h 24m

Trieste Ronchi dei Legionari

Wed 10/14

6:35 am-1:15 pm

1 stop15h 40m

$871

San FranciscoTrieste

SFO San Francisco - TRS Trieste Ronchi dei Legionari

SFOTRS

San Francisco

Wed 9/16

3:15 pm-10:25 am

1 stop34h 10m

Trieste Ronchi dei Legionari

Mon 10/5

7:15 pm-6:50 pm

2 stops32h 35m

$907

San FranciscoTrieste

SFO San Francisco - TRS Trieste Ronchi dei Legionari

SFOTRS

San Francisco

Wed 9/16

3:10 pm-10:25 pm

2 stops22h 15m

Trieste Ronchi dei Legionari

Tue 10/6

6:20 am-12:40 pm

1 stop15h 20m

$1,012

San FranciscoTrieste

SFO San Francisco - TRS Trieste Ronchi dei Legionari

SFOTRS

San Francisco

Mon 9/21

3:10 pm-10:25 pm

2 stops22h 15m

Trieste Ronchi dei Legionari

Tue 10/20

6:20 am-12:40 pm

1 stop15h 20m

$1,012

San FranciscoTrieste

SFO San Francisco - TRS Trieste Ronchi dei Legionari

SFOTRS

San Francisco

Tue 9/22

3:10 pm-10:15 pm

2 stops22h 05m

Trieste Ronchi dei Legionari

Tue 10/20

6:20 am-12:40 pm

1 stop15h 20m

$1,012

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 and Lufthansa 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 44% 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

Best Price Found	$437
Fastest flight time	18h 25m
Direct flights	None

The best one-way flight to Trieste from San Francisco in the past 72 hours is $437. The best round-trip flight deal from San Francisco to Trieste found on momondo in the last 72 hours is $803.

The fastest flight from San Francisco to Trieste takes 18h 25m

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 25m.
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 August 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 (70% of total bookings). The next most popular airline is Lufthansa (30%).

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 8,199 reviews		Search Lufthansa flights
ITA Airways	PriceFrom $761	Free Cancellation	Rating 6.7 1,321 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.