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Cheap flights from San Diego to Trieste from $619

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 Diego to Trieste departing on 9/9. 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 San Diego to Trieste

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
7:18 am - 10:25 am
SAN
-
TRS
42h 07m
2 stops
Multiple Airlines Logo
6:35 am - 11:21 pm
TRS
-
SAN
25h 46m
2 stops
$1,046Multiple Airlines
Thu, Jul 30 - Thu, Aug 6
United Airlines Logo
10:30 pm - 10:25 am
SAN
-
TRS
26h 55m
2 stops
United Airlines Logo
6:35 am - 9:57 pm
TRS
-
SAN
24h 22m
2 stops
$1,121United Airlines
Sat, Dec 5 - Tue, Dec 8
Lufthansa Logo
2:07 pm - 9:55 pm
SAN
-
TRS
22h 48m
2 stops
Lufthansa Logo
6:15 am - 8:08 pm
TRS
-
SAN
22h 53m
2 stops
$1,137Lufthansa
Fri, Oct 2 - Sat, Oct 10
United Airlines Logo
7:41 pm - 10:25 am
SAN
-
TRS
29h 44m
3 stops
United Airlines Logo
6:35 am - 11:40 pm
TRS
-
SAN
26h 05m
2 stops
$1,274United Airlines
Thu, Jul 30 - Thu, Aug 6
Multiple Airlines Logo
12:30 pm - 10:55 pm
SAN
-
TRS
25h 25m
3 stops
Multiple Airlines Logo
2:40 pm - 3:25 pm
TRS
-
SAN
33h 45m
3 stops
$1,795Multiple Airlines
Thu, Jul 30 - Thu, Aug 6

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United Airlines flights from San Diego to Trieste

Our best United Airlines deals on San Diego to Trieste flight tickets
United Airlines
Dec 5
SAN10:30 pmSan Diego
26h 55m
2 stops
TRS10:25 amTrieste Ronchi dei Legionari
Dec 8
TRS6:35 amTrieste Ronchi dei Legionari
24h 22m
2 stops
SAN9:57 pmSan Diego
$1,121
United Airlines
Jul 30
SAN7:41 pmSan Diego
29h 44m
3 stops
TRS10:25 amTrieste Ronchi dei Legionari
Aug 6
TRS6:35 amTrieste Ronchi dei Legionari
26h 05m
2 stops
SAN11:40 pmSan Diego
$1,274

momondo Fare Finder

 
Customize your flight search to find flights from San Diego to Trieste 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 July 4, 2026.
Use the filters below to find and compare flights from San Diego to Trieste that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

San DiegoTrieste

SAN - TRS

SANTRS

San Diego

Thu 7/30

7:18 am-10:25 am

2 stops42h 07m

Trieste Ronchi dei Legionari

Thu 8/6

6:35 am-11:21 pm

2 stops25h 46m

$1,046

San DiegoTrieste

SAN - TRS

SANTRS

San Diego

Sat 12/5

10:30 pm-10:25 am

2 stops26h 55m

Trieste Ronchi dei Legionari

Tue 12/8

6:35 am-9:57 pm

2 stops24h 22m

$1,121
Quickest round-trip

San DiegoTrieste

SAN - TRS

SANTRS

San Diego

Fri 10/2

2:07 pm-9:55 pm

2 stops22h 48m

Trieste Ronchi dei Legionari

Sat 10/10

6:15 am-8:08 pm

2 stops22h 53m

$1,137

San DiegoTrieste

SAN - TRS

SANTRS

San Diego

Thu 7/30

7:41 pm-10:25 am

3 stops29h 44m

Trieste Ronchi dei Legionari

Thu 8/6

6:35 am-11:40 pm

2 stops26h 05m

$1,274

San DiegoTrieste

SAN - TRS

SANTRS

San Diego

Thu 7/30

12:30 pm-10:55 pm

3 stops25h 25m

Trieste Ronchi dei Legionari

Thu 8/6

2:40 pm-3:25 pm

3 stops33h 45m

$1,795
Cheapest one-way
Quickest one-way

San DiegoTrieste

SAN - TRS

SANTRS

San Diego

Wed 9/9

8:00 am-10:25 am

2 stops17h 25m

$619

San DiegoTrieste

SAN - TRS

SANTRS

San Diego

Wed 9/9

6:41 am-10:25 am

2 stops18h 44m

$729

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to Trieste from

How to get the cheapest flight ticket from San Diego 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 airline that flies from San Diego to Trieste Ronchi dei Legionari?

United Airlines is the most popular carrier operating from San Diego to Trieste Ronchi dei Legionari

What airlines fly to Trieste?

Lufthansa, United Airlines and British Airways are the top three most popular airlines that fly to Trieste from San Diego according to our data. Lufthansa is the first choice among our users, with 38% of people opting to fly with this airline when traveling to Trieste. Keep in mind that there are 4 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 Diego to Trieste

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

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

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

Fastest flight time

26h 55m

Direct flights

None
The fastest flight from San Diego to Trieste takes 26h 55m
There are no direct flights from San Diego to Trieste. There are no popular flight routes from San Diego to Trieste.
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Frequently asked questions about flying from San Diego to Trieste

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

    San Diego and Trieste Ronchi dei Legionari are 6209.3 mi apart from one another. 26h 55m is a normal flight duration for this route.

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

    Prices for flights from San Diego Airport to Trieste Ronchi dei Legionari Airport are refreshed on a daily basis.

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

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from San Diego 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 required for your trip to Trieste Ronchi dei Legionari Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Trieste Ronchi dei Legionari Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Traveling to a place near Trieste?

Book flights to Trieste if you plan to visit one of these locations
Udine
Grado

Why use momondo?

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

It is quick and easy to find San Diego to Trieste 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 Trieste that suits you.

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

Flights from San Diego to Trieste with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

momondo provides multiple filters to help you find the best flight to Trieste from San Diego. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from San Diego 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 Diego and alert you when they change.

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Fly your favorite airline to Trieste

Airlines are sorted and displayed according to clicks in the past 7 days on momondo
Lufthansa
United Airlines
British Airways
Delta