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

Frankfurt am Main (FRA) was the most common stop: 65% of momondo users choosing 1-stop flights on this route connected there.

What airlines fly to Trieste?

ITA Airways, United Airlines and Lufthansa are the top three most popular airlines that fly to Trieste from San Francisco according to our data. ITA Airways is the first choice among our users, with 29% of people opting to fly with this airline when traveling to Trieste. Keep in mind that there are 15 different airlines that fly to Trieste on a routine basis, so you have a few additional options to choose from.

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 36m.

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

Flights via Rome (FCO) offer the lowest average round-trip price of $1,231.

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

ITA Airways, TAP AIR PORTUGAL, and Turkish Airlines are the most popular carriers 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 Rome (FCO) have the shortest average one-way travel time: 14h 55m.

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 September 2025.

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.

$544 Cheap Flights from San Francisco to Trieste in 2025/26

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Find the cheapest flights from San Francisco to Trieste

Round-trip

One-way

Cheap round-trip flights

4:05 pm - 2:30 pmSFO-TRS

14h 25m1 stop

6:35 am - 1:05 pmTRS-SFO

15h 30m1 stop

$636ITA Airways

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Thu, Oct 30 - Thu, Nov 6

2:35 pm - 10:30 pmSFO-TRS

23h 55m1 stop

6:25 am - 5:50 pmTRS-SFO

20h 25m2 stops

$682

Find Deal

Thu, Oct 30 - Thu, Nov 6

2:40 pm - 2:05 pmSFO-TRS

14h 25m1 stop

3:00 pm - 1:40 pmTRS-SFO

30h 40m1 stop

$694Lufthansa

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Wed, Mar 4 - Sun, Mar 8

8:27 am - 2:05 pmSFO-TRS

20h 38m2 stops

3:00 pm - 1:40 pmTRS-SFO

30h 40m1 stop

$698Lufthansa

Find Deal

Wed, Mar 4 - Sun, Mar 8

8:25 am - 10:55 pmSFO-TRS

30h 30m3 stops

6:35 am - 9:22 pmTRS-SFO

23h 47m3 stops

$703

Find Deal

Thu, Oct 30 - Thu, Nov 6

8:27 am - 2:05 pmSFO-TRS

20h 38m2 stops

3:00 pm - 8:35 pmTRS-SFO

37h 35m2 stops

$722Lufthansa

Find Deal

Wed, Mar 4 - Sun, Mar 8

3:15 pm - 10:55 pmSFO-TRS

22h 40m1 stop

7:15 pm - 1:25 pmTRS-SFO

27h 10m1 stop

$869ITA Airways

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Sun, Oct 12 - Sat, Oct 18

6:45 pm - 6:30 pmSFO-TRS

38h 45m2 stops

6:35 am - 10:35 amTRS-SFO

37h 00m2 stops

$1,133Turkish Airlines

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Sun, Oct 12 - Sat, Oct 18

12:40 pm - 10:55 pmSFO-TRS

25h 15m2 stops

3:15 pm - 4:40 pmTRS-SFO

34h 25m2 stops

$1,134Turkish Airlines

Find Deal

Sat, Oct 11 - Fri, Oct 17

2:30 pm - 10:25 amSFO-TRS

58h 55m2 stops

6:35 am - 9:34 pmTRS-SFO

23h 59m2 stops

$1,418United Airlines

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Fri, Jan 16 - Sun, Jan 25

Turkish Airlines flights from San Francisco to Trieste

Our best Turkish Airlines deals on San Francisco to Trieste flight tickets

Turkish Airlines

Oct 12

SFO6:45 pmSan Francisco

38h 45m

2 stops

TRS6:30 pmTrieste Ronchi dei Legionari

Oct 18

TRS6:35 amTrieste Ronchi dei Legionari

37h 00m

2 stops

SFO10:35 amSan Francisco

$1,133

Find similar

Turkish Airlines

Oct 11

SFO12:40 pmSan Francisco

25h 15m

2 stops

TRS10:55 pmTrieste Ronchi dei Legionari

Oct 17

TRS3:15 pmTrieste Ronchi dei Legionari

34h 25m

2 stops

SFO4:40 pmSan Francisco

$1,134

Find similar

Turkish Airlines

Nov 21

SFO6:50 pmSan Francisco

34h 40m

2 stops

TRS2:30 pmTrieste Ronchi dei Legionari

Nov 30

TRS11:15 amTrieste Ronchi dei Legionari

38h 30m

2 stops

SFO4:45 pmSan Francisco

$1,617

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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

Oct 30

SFO4:05 pmSan Francisco

14h 25m

1 stop

TRS2:30 pmTrieste Ronchi dei Legionari

Nov 6

TRS6:35 amTrieste Ronchi dei Legionari

15h 30m

1 stop

SFO1:05 pmSan Francisco

$636

Find similar

ITA Airways

Oct 12

SFO3:15 pmSan Francisco

22h 40m

1 stop

TRS10:55 pmTrieste Ronchi dei Legionari

Oct 18

TRS7:15 pmTrieste Ronchi dei Legionari

27h 10m

1 stop

SFO1:25 pmSan Francisco

$869

Find similar

ITA Airways

Sep 29

SFO3:15 pmSan Francisco

20h 40m

2 stops

TRS8:55 pmTrieste Ronchi dei Legionari

Oct 5

TRS3:15 pmTrieste Ronchi dei Legionari

39h 35m

2 stops

SFO9:50 pmSan Francisco

$943

Find similar

Fly from

Fly to

Route

Depart

Return

Price

San FranciscoTrieste

SFO - TRS

SFOTRS

San Francisco

Thu 10/30

4:05 pm-2:30 pm

1 stop14h 25m

Trieste Ronchi dei Legionari

Thu 11/6

6:35 am-1:05 pm

1 stop15h 30m

$636

San FranciscoTrieste

SFO - TRS

SFOTRS

San Francisco

Thu 10/30

2:35 pm-10:30 pm

1 stop23h 55m

Trieste Ronchi dei Legionari

Thu 11/6

6:25 am-5:50 pm

2 stops20h 25m

$682

San FranciscoTrieste

SFO - TRS

SFOTRS

San Francisco

Wed 3/4

2:40 pm-2:05 pm

1 stop14h 25m

Trieste Ronchi dei Legionari

Sun 3/8

3:00 pm-1:40 pm

1 stop30h 40m

$694

San FranciscoTrieste

SFO - TRS

SFOTRS

San Francisco

Wed 3/4

8:27 am-2:05 pm

2 stops20h 38m

Trieste Ronchi dei Legionari

Sun 3/8

3:00 pm-1:40 pm

1 stop30h 40m

$698

San FranciscoTrieste

SFO - TRS

SFOTRS

San Francisco

Thu 10/30

8:25 am-10:55 pm

3 stops30h 30m

Trieste Ronchi dei Legionari

Thu 11/6

6:35 am-9:22 pm

3 stops23h 47m

$703

San FranciscoTrieste

SFO - TRS

SFOTRS

San Francisco

Wed 3/4

8:27 am-2:05 pm

2 stops20h 38m

Trieste Ronchi dei Legionari

Sun 3/8

3:00 pm-8:35 pm

2 stops37h 35m

$722

San FranciscoTrieste

SFO - TRS

SFOTRS

San Francisco

Sun 10/12

3:15 pm-10:55 pm

1 stop22h 40m

Trieste Ronchi dei Legionari

Sat 10/18

7:15 pm-1:25 pm

1 stop27h 10m

$869

San FranciscoTrieste

SFO - TRS

SFOTRS

San Francisco

Sun 10/12

6:45 pm-6:30 pm

2 stops38h 45m

Trieste Ronchi dei Legionari

Sat 10/18

6:35 am-10:35 am

2 stops37h 00m

$1,133

San FranciscoTrieste

SFO - TRS

SFOTRS

San Francisco

Sat 10/11

12:40 pm-10:55 pm

2 stops25h 15m

Trieste Ronchi dei Legionari

Fri 10/17

3:15 pm-4:40 pm

2 stops34h 25m

$1,134

San FranciscoTrieste

SFO - TRS

SFOTRS

San Francisco

Fri 1/16

2:30 pm-10:25 am

2 stops58h 55m

Trieste Ronchi dei Legionari

Sun 1/25

6:35 am-9:34 pm

2 stops23h 59m

$1,418

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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

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Layovers

What is the cheapest day to depart on your flight to Trieste?

The cheapest day to depart on your flight to Trieste is on a Sunday when prices can be found for as low as $1,102. This is often the case because there is less demand to fly during this day of the week. Flights from San Francisco to Trieste on a Saturday will generally be more expensive and average around $1,672. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Trieste?

Our most recent data shows that the best time of day to fly to Trieste is in the afternoon. Flights from San Francisco to Trieste during this time can be as low as $1,213. Flights to Trieste are more costly at noon, with an average ticket price of $1,373. Departure times at noon fall within the peak daily travel times, which is why tickets can be more expensive.

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

Direct flights	None

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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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 14h 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 September 2025.
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 (57% of total bookings). The next most popular airline is Lufthansa (43%).

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 7,407 reviews		Search Lufthansa flights
ITA Airways	PriceFrom $762	Free Cancellation	Rating 6.7 1,036 reviews		Search ITA Airways flights

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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.

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Cheap flights from San Francisco to Trieste from $544

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from San Francisco to Trieste departing on 9/21. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Turkish Airlines flights from San Francisco to Trieste

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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

What is the cheapest day to depart on your flight to Trieste?

What is the cheapest time of day to depart on your flight to Trieste?

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

ITA Airways, TAP AIR PORTUGAL, and Turkish Airlines are the most popular carriers operating from San Francisco to Trieste Ronchi dei Legionari

What airlines fly to Trieste?

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

Frankfurt am Main (FRA) was the most common stop: 65% 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 $1,231.

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: 14h 55m.

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 36m.

When to book flights from San Francisco to Trieste

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

Direct flights

How far is San Francisco to Trieste Ronchi dei Legionari by plane?

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

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

How old do you have to be to fly 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?

What is the most popular airline from San Francisco to Trieste?

Best airlines flying from San Francisco to Trieste

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

Traveling to a place near Trieste?

Why use momondo?

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

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

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

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

An easier way to manage your Trieste trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Italy

Fly your favorite airline to Trieste

Airlines are sorted and displayed according to clicks in the past 7 days on momondo