Latest deals
Insights
When to book
FAQs
Price Alerts

Cheap flights from Trieste to San Diego from $1,003

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 Diego departing on 9/18. 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

Find the cheapest flights from Trieste to San Diego

Cheap round-trip flights

Enter your travel dates to find the best prices.
Lufthansa Logo
6:10 am - 9:24 pmTRS  Trieste Ronchi dei Legionari-SAN San Diego
24h 14m2 stops Frankfurt am Main Houston George Bush Intcntl
Lufthansa Logo
2:07 pm - 9:55 pmSAN  San Diego-TRS Trieste Ronchi dei Legionari
22h 48m2 stops Chicago O'Hare Intl Frankfurt am Main
$1,003Lufthansa
Fri, Sep 18 - Fri, Sep 25
Multiple Airlines Logo
6:35 am - 10:39 amTRS  Trieste Ronchi dei Legionari-SAN San Diego
37h 04m2 stops Rome Fiumicino Seattle/Tacoma Intl
Multiple Airlines Logo
11:37 am - 10:55 pmSAN  San Diego-TRS Trieste Ronchi dei Legionari
26h 18m2 stops Seattle/Tacoma Intl Rome Fiumicino
$1,079Multiple Airlines
Fri, Aug 21 - Tue, Aug 25
Lufthansa Logo
2:50 pm - 3:25 pmTRS  Trieste Ronchi dei Legionari-SAN San Diego
33h 35m2 stops Frankfurt am Main Munich Franz Josef Strauss
Lufthansa Logo
6:18 am - 10:15 pmSAN  San Diego-TRS Trieste Ronchi dei Legionari
30h 57m2 stops Chicago O'Hare Intl Frankfurt am Main
$1,100Lufthansa
Mon, Sep 14 - Sun, Sep 20
United Airlines Logo
6:35 am - 7:43 pmTRS  Trieste Ronchi dei Legionari-SAN San Diego
22h 08m2 stops Rome Fiumicino Newark
United Airlines Logo
6:15 am - 10:25 amSAN  San Diego-TRS Trieste Ronchi dei Legionari
43h 10m3 stops Los Angeles Washington, D.C. Dulles Intl Rome Fiumicino
$1,212United Airlines
Thu, Oct 15 - Mon, Oct 19
United Airlines Logo
6:35 am - 10:19 pmTRS  Trieste Ronchi dei Legionari-SAN San Diego
24h 44m2 stops Rome Fiumicino Newark
United Airlines Logo
6:15 am - 10:25 amSAN  San Diego-TRS Trieste Ronchi dei Legionari
43h 10m3 stops Los Angeles Washington, D.C. Dulles Intl Rome Fiumicino
$1,215United Airlines
Thu, Oct 15 - Mon, Oct 19
United Airlines Logo
6:35 am - 8:39 pmTRS  Trieste Ronchi dei Legionari-SAN San Diego
23h 04m2 stops Rome Fiumicino Montreal Pierre Elliott Trudeau Intl
United Airlines Logo
7:15 am - 10:25 amSAN  San Diego-TRS Trieste Ronchi dei Legionari
42h 10m2 stops San Francisco Rome Fiumicino
$1,305United Airlines
Thu, Sep 3 - Mon, Sep 7
United Airlines Logo
6:35 am - 8:39 pmTRS  Trieste Ronchi dei Legionari-SAN San Diego
23h 04m2 stops Rome Fiumicino Montreal Pierre Elliott Trudeau Intl
United Airlines Logo
7:15 am - 10:25 amSAN  San Diego-TRS Trieste Ronchi dei Legionari
42h 10m3 stops San Francisco Denver Intl Rome Fiumicino
$1,306United Airlines
Thu, Sep 3 - Mon, Sep 7
United Airlines Logo
6:35 am - 12:29 amTRS  Trieste Ronchi dei Legionari-SAN San Diego
26h 54m3 stops Rome Fiumicino Denver Intl San Francisco
United Airlines Logo
2:24 pm - 10:25 amSAN  San Diego-TRS Trieste Ronchi dei Legionari
35h 01m3 stops Los Angeles Washington, D.C. Dulles Intl Rome Fiumicino
$1,307United Airlines
Thu, Sep 3 - Mon, Sep 7
United Airlines Logo
6:35 am - 12:29 amTRS  Trieste Ronchi dei Legionari-SAN San Diego
26h 54m3 stops Rome Fiumicino Denver Intl San Francisco
United Airlines Logo
2:24 pm - 10:25 amSAN  San Diego-TRS Trieste Ronchi dei Legionari
35h 01m3 stops Los Angeles Washington, D.C. Dulles Intl Rome Fiumicino
$1,308United Airlines
Thu, Sep 3 - Mon, Sep 7
United Airlines Logo
6:35 am - 12:29 amTRS  Trieste Ronchi dei Legionari-SAN San Diego
26h 54m3 stops Rome Fiumicino Denver Intl San Francisco
United Airlines Logo
2:24 pm - 10:25 amSAN  San Diego-TRS Trieste Ronchi dei Legionari
35h 01m3 stops Los Angeles Washington, D.C. Dulles Intl Rome Fiumicino
$1,310United Airlines
Thu, Sep 3 - Mon, Sep 7

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Lufthansa flights from Trieste to San Diego

Our best Lufthansa deals on Trieste to San Diego flight tickets
Lufthansa
Sep 18
TRS6:10 amTrieste Ronchi dei Legionari
24h 14m
2 stops
SAN9:24 pmSan Diego
Sep 25
SAN2:07 pmSan Diego
22h 48m
2 stops
TRS9:55 pmTrieste Ronchi dei Legionari
$1,003
Lufthansa
Sep 14
TRS2:50 pmTrieste Ronchi dei Legionari
33h 35m
2 stops
SAN3:25 pmSan Diego
Sep 20
SAN6:18 amSan Diego
30h 57m
2 stops
TRS10:15 pmTrieste Ronchi dei Legionari
$1,100

United Airlines flights from Trieste to San Diego

Our best United Airlines deals on Trieste to San Diego flight tickets
United Airlines
Oct 15
TRS6:35 amTrieste Ronchi dei Legionari
22h 08m
2 stops
SAN7:43 pmSan Diego
Oct 19
SAN6:15 amSan Diego
43h 10m
3 stops
TRS10:25 amTrieste Ronchi dei Legionari
$1,212
United Airlines
Oct 15
TRS6:35 amTrieste Ronchi dei Legionari
24h 44m
2 stops
SAN10:19 pmSan Diego
Oct 19
SAN6:15 amSan Diego
43h 10m
3 stops
TRS10:25 amTrieste Ronchi dei Legionari
$1,215
United Airlines
Sep 3
TRS6:35 amTrieste Ronchi dei Legionari
23h 04m
2 stops
SAN8:39 pmSan Diego
Sep 7
SAN7:15 amSan Diego
42h 10m
2 stops
TRS10:25 amTrieste Ronchi dei Legionari
$1,305

momondo Fare Finder

 
Customize your flight search to find flights from Trieste to San Diego 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 August 9, 2026.
Use the filters below to find and compare flights from Trieste to San Diego that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

TriesteSan Diego

TRS Trieste Ronchi dei Legionari - SAN San Diego

TRSSAN

Trieste Ronchi dei Legionari

Fri 9/18

6:10 am-9:24 pm

2 stops24h 14m

San Diego

Fri 9/25

2:07 pm-9:55 pm

2 stops22h 48m

$1,003

TriesteSan Diego

TRS Trieste Ronchi dei Legionari - SAN San Diego

TRSSAN

Trieste Ronchi dei Legionari

Fri 8/21

6:35 am-10:39 am

2 stops37h 04m

San Diego

Tue 8/25

11:37 am-10:55 pm

2 stops26h 18m

$1,079

TriesteSan Diego

TRS Trieste Ronchi dei Legionari - SAN San Diego

TRSSAN

Trieste Ronchi dei Legionari

Mon 9/14

2:50 pm-3:25 pm

2 stops33h 35m

San Diego

Sun 9/20

6:18 am-10:15 pm

2 stops30h 57m

$1,100

TriesteSan Diego

TRS Trieste Ronchi dei Legionari - SAN San Diego

TRSSAN

Trieste Ronchi dei Legionari

Thu 10/15

6:35 am-7:43 pm

2 stops22h 08m

San Diego

Mon 10/19

6:15 am-10:25 am

3 stops43h 10m

$1,212

TriesteSan Diego

TRS Trieste Ronchi dei Legionari - SAN San Diego

TRSSAN

Trieste Ronchi dei Legionari

Thu 10/15

6:35 am-10:19 pm

2 stops24h 44m

San Diego

Mon 10/19

6:15 am-10:25 am

3 stops43h 10m

$1,215

TriesteSan Diego

TRS Trieste Ronchi dei Legionari - SAN San Diego

TRSSAN

Trieste Ronchi dei Legionari

Thu 9/3

6:35 am-8:39 pm

2 stops23h 04m

San Diego

Mon 9/7

7:15 am-10:25 am

2 stops42h 10m

$1,305

TriesteSan Diego

TRS Trieste Ronchi dei Legionari - SAN San Diego

TRSSAN

Trieste Ronchi dei Legionari

Thu 9/3

6:35 am-8:39 pm

2 stops23h 04m

San Diego

Mon 9/7

7:15 am-10:25 am

3 stops42h 10m

$1,306

TriesteSan Diego

TRS Trieste Ronchi dei Legionari - SAN San Diego

TRSSAN

Trieste Ronchi dei Legionari

Thu 9/3

6:35 am-12:29 am

3 stops26h 54m

San Diego

Mon 9/7

2:24 pm-10:25 am

3 stops35h 01m

$1,307

TriesteSan Diego

TRS Trieste Ronchi dei Legionari - SAN San Diego

TRSSAN

Trieste Ronchi dei Legionari

Thu 9/3

6:35 am-12:29 am

3 stops26h 54m

San Diego

Mon 9/7

2:24 pm-10:25 am

3 stops35h 01m

$1,308

TriesteSan Diego

TRS Trieste Ronchi dei Legionari - SAN San Diego

TRSSAN

Trieste Ronchi dei Legionari

Thu 9/3

6:35 am-12:29 am

3 stops26h 54m

San Diego

Mon 9/7

2:24 pm-10:25 am

3 stops35h 01m

$1,310

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 19 resultsSorted by cheapest first
1
2

See travel insights to San Diego from

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

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 airline that flies from Trieste Ronchi dei Legionari to San Diego?

Lufthansa and Icelandair are the most popular carriers operating from Trieste Ronchi dei Legionari to San Diego

When to book flights from Trieste to San Diego

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

Cheap Trieste to San Diego (TRS to SAN) flight deals and tips

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

Fastest flight time

23h 04m

Direct flights

None
The fastest flight from Trieste to San Diego takes 23h 04m
There are no direct flights from Trieste to San Diego. There are no popular flight routes from Trieste to San Diego.
Search flight deals

Frequently asked questions about flying from Trieste to San Diego

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

    San Diego is 6209.3 mi away from Trieste Ronchi dei Legionari. 23h 04m is a normal flight duration for this route.

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

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

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

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

    The travel and health documents you'll need for your trip to San Diego 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 San Diego Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Traveling to a place near San Diego?

Book flights to San Diego if you plan to visit one of these locations
Chula Vista
Coronado
El Cajon
National City
Julian
La Mesa
Poway
San Ysidro
Imperial Beach
Borrego Springs
Santee
Lemon Grove
Alpine

Why use momondo?

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

It is quick and easy to find Trieste to San Diego flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to San Diego that suits you.

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

Yes. momondo enables you to select and highlight flights to San Diego from Trieste with this policy.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Trieste to San Diego.

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

If you are simply researching potential flights to San Diego, momondo offers a useful price alert feature which will track prices for flights to San Diego from Trieste and alert you when they change.

An easier way to manage your San Diego 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.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Tue 9/8
Tue 9/15
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States