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Cheap flights from Trieste to San Francisco from $643

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Trieste to San Francisco departing on 10/23. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Trieste to San Francisco

Cheap round-trip flights

Enter your travel dates to find the best prices.
ITA Airways Logo
7:15 pm - 1:15 pm
TRS
-
SFO
27h 00m
1 stop
ITA Airways Logo
4:05 pm - 6:30 pm
SFO
-
TRS
18h 25m
1 stop
$643ITA Airways
Fri, Oct 23 - Tue, Oct 27
ITA Airways Logo
7:15 pm - 1:15 pm
TRS
-
SFO
27h 00m
1 stop
ITA Airways Logo
4:05 pm - 6:30 pm
SFO
-
TRS
18h 25m
1 stop
$644ITA Airways
Fri, Oct 23 - Tue, Oct 27
ITA Airways Logo
6:35 am - 1:15 pm
TRS
-
SFO
15h 40m
1 stop
ITA Airways Logo
3:15 pm - 6:30 pm
SFO
-
TRS
18h 15m
1 stop
$718ITA Airways
Thu, Jun 25 - Mon, Jun 29
ITA Airways Logo
7:15 pm - 1:15 pm
TRS
-
SFO
27h 00m
1 stop
ITA Airways Logo
3:15 pm - 10:55 pm
SFO
-
TRS
22h 40m
1 stop
$733ITA Airways
Thu, Sep 3 - Mon, Sep 7
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
$759Multiple Airlines
Thu, Jun 25 - Mon, Jun 29
Lufthansa Logo
6:15 am - 7:50 pm
TRS
-
SFO
22h 35m
1 stop
Lufthansa Logo
1:55 pm - 10:15 pm
SFO
-
TRS
23h 20m
1 stop
$767Lufthansa
Thu, Jul 9 - Sun, Jul 19
Lufthansa Logo
6:15 am - 7:50 pm
TRS
-
SFO
22h 35m
1 stop
Lufthansa Logo
1:55 pm - 10:15 pm
SFO
-
TRS
23h 20m
1 stop
$769Lufthansa
Thu, Jul 23 - Sun, Aug 2
ITA Airways Logo
7:15 pm - 5:42 pm
TRS
-
SFO
31h 27m
2 stops
ITA Airways Logo
4:05 pm - 6:30 pm
SFO
-
TRS
18h 25m
1 stop
$770ITA Airways
Fri, Oct 23 - Tue, Oct 27
ITA Airways Logo
7:15 pm - 5:42 pm
TRS
-
SFO
31h 27m
2 stops
ITA Airways Logo
4:05 pm - 6:30 pm
SFO
-
TRS
18h 25m
1 stop
$771ITA Airways
Fri, Oct 23 - Tue, Oct 27
Lufthansa Logo
2:40 pm - 12:32 am
TRS
-
SFO
18h 52m
2 stops
Lufthansa Logo
1:55 pm - 10:15 pm
SFO
-
TRS
23h 20m
1 stop
$773Lufthansa
Thu, Jul 9 - Sun, Jul 19

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Lufthansa flights from Trieste to San Francisco

Our best Lufthansa deals on Trieste to San Francisco flight tickets
Lufthansa
Jul 9
TRS6:15 amTrieste Ronchi dei Legionari
22h 35m
1 stop
SFO7:50 pmSan Francisco
Jul 19
SFO1:55 pmSan Francisco
23h 20m
1 stop
TRS10:15 pmTrieste Ronchi dei Legionari
$767
Lufthansa
Jul 23
TRS6:15 amTrieste Ronchi dei Legionari
22h 35m
1 stop
SFO7:50 pmSan Francisco
Aug 2
SFO1:55 pmSan Francisco
23h 20m
1 stop
TRS10:15 pmTrieste Ronchi dei Legionari
$769
Lufthansa
Jul 9
TRS2:40 pmTrieste Ronchi dei Legionari
18h 52m
2 stops
SFO12:32 amSan Francisco
Jul 19
SFO1:55 pmSan Francisco
23h 20m
1 stop
TRS10:15 pmTrieste Ronchi dei Legionari
$773

United Airlines flights from Trieste to San Francisco

Our best United Airlines deals on Trieste to San Francisco flight tickets
United Airlines
Sep 3
TRS6:35 amTrieste Ronchi dei Legionari
21h 50m
1 stop
SFO7:25 pmSan Francisco
Sep 7
SFO6:00 amSan Francisco
19h 25m
2 stops
TRS10:25 amTrieste Ronchi dei Legionari
$847
United Airlines
Sep 3
TRS6:35 amTrieste Ronchi dei Legionari
24h 13m
2 stops
SFO9:48 pmSan Francisco
Sep 7
SFO5:00 amSan Francisco
20h 25m
2 stops
TRS10:25 amTrieste Ronchi dei Legionari
$850
United Airlines
Jul 17
TRS6:35 amTrieste Ronchi dei Legionari
23h 53m
2 stops
SFO9:28 pmSan Francisco
Jul 27
SFO9:15 pmSan Francisco
28h 10m
2 stops
TRS10:25 amTrieste Ronchi dei Legionari
$854

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 June 15, 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

Fri 10/23

7:15 pm-1:15 pm

1 stop27h 00m

San Francisco

Tue 10/27

4:05 pm-6:30 pm

1 stop18h 25m

$643

TriesteSan Francisco

TRS - SFO

TRSSFO

Trieste Ronchi dei Legionari

Fri 10/23

7:15 pm-1:15 pm

1 stop27h 00m

San Francisco

Tue 10/27

4:05 pm-6:30 pm

1 stop18h 25m

$644
Quickest round-trip

TriesteSan Francisco

TRS - SFO

TRSSFO

Trieste Ronchi dei Legionari

Thu 6/25

6:35 am-1:15 pm

1 stop15h 40m

San Francisco

Mon 6/29

3:15 pm-6:30 pm

1 stop18h 15m

$718

TriesteSan Francisco

TRS - SFO

TRSSFO

Trieste Ronchi dei Legionari

Thu 9/3

7:15 pm-1:15 pm

1 stop27h 00m

San Francisco

Mon 9/7

3:15 pm-10:55 pm

1 stop22h 40m

$733

TriesteSan Francisco

TRS - SFO

TRSSFO

Trieste Ronchi dei Legionari

Thu 6/25

6:35 am-1:15 pm

1 stop15h 40m

San Francisco

Mon 6/29

9:43 pm-2:30 pm

2 stops31h 47m

$759

TriesteSan Francisco

TRS - SFO

TRSSFO

Trieste Ronchi dei Legionari

Thu 7/9

6:15 am-7:50 pm

1 stop22h 35m

San Francisco

Sun 7/19

1:55 pm-10:15 pm

1 stop23h 20m

$767

TriesteSan Francisco

TRS - SFO

TRSSFO

Trieste Ronchi dei Legionari

Thu 7/23

6:15 am-7:50 pm

1 stop22h 35m

San Francisco

Sun 8/2

1:55 pm-10:15 pm

1 stop23h 20m

$769

TriesteSan Francisco

TRS - SFO

TRSSFO

Trieste Ronchi dei Legionari

Fri 10/23

7:15 pm-5:42 pm

2 stops31h 27m

San Francisco

Tue 10/27

4:05 pm-6:30 pm

1 stop18h 25m

$770

TriesteSan Francisco

TRS - SFO

TRSSFO

Trieste Ronchi dei Legionari

Fri 10/23

7:15 pm-5:42 pm

2 stops31h 27m

San Francisco

Tue 10/27

4:05 pm-6:30 pm

1 stop18h 25m

$771

TriesteSan Francisco

TRS - SFO

TRSSFO

Trieste Ronchi dei Legionari

Thu 7/9

2:40 pm-12:32 am

2 stops18h 52m

San Francisco

Sun 7/19

1:55 pm-10:15 pm

1 stop23h 20m

$773

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 18 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 September is also cheap. Prices for this month can be found on momondo for an average of $640.

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 40m

Direct flights

None
The fastest flight from Trieste to San Francisco takes 15h 40m
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 40m.

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

  • 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.

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

Best airlines flying from Trieste to San Francisco

Compare and see reviews for airlines that fly from Trieste to San Francisco with momondo
Airline
Rating
Free Cancellation
Price
LufthansaPriceFrom $653Free CancellationRating
6.8
8,061 reviews
Search Lufthansa flights

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
Hayward
Bodega Bay
Roseville
Walnut Creek
Santa Clara
Berkeley
Fremont
Vallejo
South San Francisco
Sunnyvale
Big Sur
Pacific Grove
Salinas
Daly City
Calistoga
Burlingame

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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