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Cheap flights from Trieste to San Francisco from $411

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Trieste to San Francisco departing on 5/28. 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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0 bags

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Find the cheapest flights from Trieste to San Francisco

Cheap round-trip flights

Enter your travel dates to find the best prices.
Lufthansa Logo
6:10 am - 7:50 pm
TRS
-
SFO
22h 40m
1 stop
Lufthansa Logo
7:15 pm - 10:15 pm
SFO
-
TRS
18h 00m
1 stop
$570Lufthansa
Mon, May 25 - Sun, May 31
ITA Airways Logo
6:35 am - 1:15 pm
TRS
-
SFO
15h 40m
1 stop
ITA Airways Logo
3:15 pm - 2:30 pm
SFO
-
TRS
14h 15m
1 stop
$585ITA Airways
Fri, May 15 - Tue, May 19
ITA Airways Logo
7:15 pm - 1:15 pm
TRS
-
SFO
27h 00m
1 stop
ITA Airways Logo
3:15 pm - 2:30 pm
SFO
-
TRS
14h 15m
1 stop
$651ITA Airways
Thu, Oct 15 - Mon, Oct 19
Multiple Airlines Logo
6:35 am - 1:15 pm
TRS
-
SFO
15h 40m
1 stop
Multiple Airlines Logo
9:43 pm - 2:30 pm
SFO
-
TRS
31h 47m
2 stops
$705Multiple Airlines
Thu, Jun 11 - Mon, Jul 6
ITA Airways Logo
3:15 pm - 1:15 pm
TRS
-
SFO
31h 00m
1 stop
ITA Airways Logo
3:15 pm - 6:30 pm
SFO
-
TRS
18h 15m
1 stop
$706ITA Airways
Wed, Jun 10 - Tue, Jul 7
ITA Airways Logo
6:35 am - 1:15 pm
TRS
-
SFO
15h 40m
1 stop
ITA Airways Logo
3:15 pm - 2:30 pm
SFO
-
TRS
14h 15m
1 stop
$716ITA Airways
Thu, Jun 11 - Mon, Jul 6
Lufthansa Logo
2:40 pm - 7:50 pm
TRS
-
SFO
14h 10m
1 stop
Lufthansa Logo
1:55 pm - 10:25 pm
SFO
-
TRS
23h 30m
1 stop
$720Lufthansa
Wed, Jun 10 - Mon, Jul 6
ITA Airways Logo
6:35 am - 1:15 pm
TRS
-
SFO
15h 40m
1 stop
ITA Airways Logo
3:15 pm - 2:30 pm
SFO
-
TRS
14h 15m
1 stop
$736ITA Airways
Wed, Jun 10 - Sun, Jul 5
United Airlines Logo
6:35 am - 7:25 pm
TRS
-
SFO
21h 50m
1 stop
United Airlines Logo
10:55 pm - 10:25 am
SFO
-
TRS
50h 30m
2 stops
$804United Airlines
Fri, Aug 28 - Mon, Aug 31
United Airlines Logo
6:35 am - 7:25 pm
TRS
-
SFO
21h 50m
1 stop
United Airlines Logo
10:35 pm - 10:25 am
SFO
-
TRS
50h 50m
2 stops
$806United Airlines
Fri, Aug 28 - Mon, Aug 31

Lufthansa flights from Trieste to San Francisco

Our best Lufthansa deals on Trieste to San Francisco flight tickets
Lufthansa
May 25
TRS6:10 amTrieste Ronchi dei Legionari
22h 40m
1 stop
SFO7:50 pmSan Francisco
May 31
SFO7:15 pmSan Francisco
18h 00m
1 stop
TRS10:15 pmTrieste Ronchi dei Legionari
$570
Lufthansa
Jun 10
TRS2:40 pmTrieste Ronchi dei Legionari
14h 10m
1 stop
SFO7:50 pmSan Francisco
Jul 6
SFO1:55 pmSan Francisco
23h 30m
1 stop
TRS10:25 pmTrieste Ronchi dei Legionari
$720
Lufthansa
Jun 12
TRS2:40 pmTrieste Ronchi dei Legionari
14h 10m
1 stop
SFO7:50 pmSan Francisco
Jul 7
SFO2:40 pmSan Francisco
22h 35m
1 stop
TRS10:15 pmTrieste Ronchi dei Legionari
$822

KLM flights from Trieste to San Francisco

Our best KLM deals on Trieste to San Francisco flight tickets
KLM
Jun 12
TRS6:35 amTrieste Ronchi dei Legionari
23h 24m
2 stops
SFO8:59 pmSan Francisco
Jul 6
SFO12:45 pmSan Francisco
20h 45m
2 stops
TRS6:30 pmTrieste Ronchi dei Legionari
$978
KLM
Jun 10
TRS6:35 amTrieste Ronchi dei Legionari
25h 00m
2 stops
SFO10:35 pmSan Francisco
Jul 7
SFO7:00 amSan Francisco
22h 30m
2 stops
TRS2:30 pmTrieste Ronchi dei Legionari
$1,032

momondo Fare Finder

 
Customize your flight search to find flights from Trieste to San Francisco that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated May 2, 2026.
Use the filters below to find and compare flights from Trieste to San Francisco that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

TriesteSan Francisco

TRS - SFO

TRSSFO

Trieste Ronchi dei Legionari

Mon 5/25

6:10 am-7:50 pm

1 stop22h 40m

San Francisco

Sun 5/31

7:15 pm-10:15 pm

1 stop18h 00m

$570
Quickest round-trip

TriesteSan Francisco

TRS - SFO

TRSSFO

Trieste Ronchi dei Legionari

Fri 5/15

6:35 am-1:15 pm

1 stop15h 40m

San Francisco

Tue 5/19

3:15 pm-2:30 pm

1 stop14h 15m

$585

TriesteSan Francisco

TRS - SFO

TRSSFO

Trieste Ronchi dei Legionari

Thu 10/15

7:15 pm-1:15 pm

1 stop27h 00m

San Francisco

Mon 10/19

3:15 pm-2:30 pm

1 stop14h 15m

$651

TriesteSan Francisco

TRS - SFO

TRSSFO

Trieste Ronchi dei Legionari

Thu 6/11

6:35 am-1:15 pm

1 stop15h 40m

San Francisco

Mon 7/6

9:43 pm-2:30 pm

2 stops31h 47m

$705

TriesteSan Francisco

TRS - SFO

TRSSFO

Trieste Ronchi dei Legionari

Wed 6/10

3:15 pm-1:15 pm

1 stop31h 00m

San Francisco

Tue 7/7

3:15 pm-6:30 pm

1 stop18h 15m

$706

TriesteSan Francisco

TRS - SFO

TRSSFO

Trieste Ronchi dei Legionari

Thu 6/11

6:35 am-1:15 pm

1 stop15h 40m

San Francisco

Mon 7/6

3:15 pm-2:30 pm

1 stop14h 15m

$716

TriesteSan Francisco

TRS - SFO

TRSSFO

Trieste Ronchi dei Legionari

Wed 6/10

2:40 pm-7:50 pm

1 stop14h 10m

San Francisco

Mon 7/6

1:55 pm-10:25 pm

1 stop23h 30m

$720

TriesteSan Francisco

TRS - SFO

TRSSFO

Trieste Ronchi dei Legionari

Wed 6/10

6:35 am-1:15 pm

1 stop15h 40m

San Francisco

Sun 7/5

3:15 pm-2:30 pm

1 stop14h 15m

$736

TriesteSan Francisco

TRS - SFO

TRSSFO

Trieste Ronchi dei Legionari

Fri 8/28

6:35 am-7:25 pm

1 stop21h 50m

San Francisco

Mon 8/31

10:55 pm-10:25 am

2 stops50h 30m

$804

TriesteSan Francisco

TRS - SFO

TRSSFO

Trieste Ronchi dei Legionari

Fri 8/28

6:35 am-7:25 pm

1 stop21h 50m

San Francisco

Mon 8/31

10:35 pm-10:25 am

2 stops50h 50m

$806

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to San Francisco from

How to get the cheapest flight ticket from Trieste to San Francisco

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 typical price of a round-trip flight between Trieste and San Francisco?

What is the cheapest month to fly to San Francisco?

If you aren’t able to travel to San Francisco during the month of October, then flying in March is also cheap. Prices for this month can be found on momondo for an average of $650.

Can stopping save me money on Trieste to San Francisco flights?

You could potentially save up to 34% on your flight if you consider stops on a Trieste to San Francisco flight.

When to book flights from Trieste to San Francisco

Are you open to changing your travel dates? Check out the ideal times to fly from Trieste to San Francisco according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Trieste to San Francisco (TRS to SFO) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Trieste to San Francisco

Fastest flight time

15h 25m

Direct flights

None
The fastest flight from Trieste to San Francisco takes 15h 25m
There are no direct flights from Trieste to San Francisco. There are no popular flight routes from Trieste to San Francisco.
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Frequently asked questions about flying from Trieste to San Francisco

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

    A flight from Trieste Ronchi dei Legionari to San Francisco will travel around 6057.7 mi. A reasonable flight in good conditions will take 15h 25m.

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

    Prices for flights from Trieste Ronchi dei Legionari Airport to San Francisco Airport were last updated today.

  • How old do you have to be to fly from Trieste Ronchi dei Legionari Airport to San Francisco 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 Trieste Ronchi dei Legionari Airport to San Francisco Airport.

  • What documentation or ID do you need to fly to San Francisco Airport?

    The required travel and health documents for your San Francisco Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at San Francisco Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Traveling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Santa Cruz
Carmel-by-the-Sea
Modesto
Sonoma
Bodega Bay
Walnut Creek
Roseville
Hayward
Berkeley
Santa Clara
Vallejo
Fremont
Big Sur
Calistoga
Daly City
South San Francisco
Pacific Grove
Sunnyvale
Salinas
Milpitas

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Trieste to San Francisco. Millions of users trust and use momondo every year so you are in good hands.

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

All flight searches from Trieste to San Francisco on momondo can be filtered to show those which offer flexible booking policies.

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

momondo helps you find the best flight between Trieste and San Francisco by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

If you are not ready to book a flight from Trieste to San Francisco now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to San Francisco and let you know when they change.

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