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Cheap flights from the United States to Trieste from $373

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from the United States to Trieste departing on 5/11. 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

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Find the cheapest flights from the United States to Trieste

Recent round-trip flight deals from the United States to Trieste

Enter your travel dates to find the best prices.
ITA Airways Logo
5:05 pm - 10:25 am
BOS
-
TRS
11h 20m
1 stop
ITA Airways Logo
6:35 am - 1:40 pm
TRS
-
BOS
13h 05m
1 stop
$621ITA Airways
Tue, Apr 28 - Tue, May 5
ITA Airways Logo
9:10 pm - 6:30 pm
JFK
-
TRS
15h 20m
1 stop
ITA Airways Logo
11:15 am - 1:15 pm
TRS
-
JFK
32h 00m
1 stop
$626ITA Airways
Thu, Apr 16 - Mon, Apr 20
Multiple Airlines Logo
6:20 pm - 11:00 pm
JFK
-
TRS
22h 40m
1 stop
Multiple Airlines Logo
11:25 am - 10:30 pm
TRS
-
JFK
17h 05m
2 stops
$652Multiple Airlines
Thu, Apr 16 - Mon, Apr 20
Multiple Airlines Logo
5:10 pm - 8:15 pm
JFK
-
TRS
21h 05m
2 stops
Multiple Airlines Logo
10:30 am - 3:40 pm
TRS
-
JFK
35h 10m
2 stops
$658Multiple Airlines
Thu, May 7 - Thu, May 14
KLM Logo
1:30 pm - 2:30 pm
BOS
-
TRS
19h 00m
2 stops
KLM Logo
6:35 am - 4:30 pm
TRS
-
BOS
15h 55m
1 stop
$662KLM
Tue, Apr 28 - Tue, May 5
Lufthansa Logo
3:05 pm - 10:25 pm
LAX
-
TRS
22h 20m
1 stop
Lufthansa Logo
2:40 pm - 11:59 pm
TRS
-
LAX
18h 19m
2 stops
$780Lufthansa
Wed, Apr 29 - Thu, May 14
Lufthansa Logo
3:05 pm - 1:45 pm
LAX
-
TRS
13h 40m
1 stop
Lufthansa Logo
2:45 pm - 1:10 pm
TRS
-
LAX
31h 25m
1 stop
$784Lufthansa
Sun, Apr 5 - Tue, Apr 14
TAP AIR PORTUGAL Logo
11:00 pm - 6:30 pm
EWR
-
TRS
37h 30m
2 stops
TAP AIR PORTUGAL Logo
6:35 am - 3:30 pm
TRS
-
EWR
38h 55m
2 stops
$842TAP AIR PORTUGAL
Tue, Aug 4 - Mon, Aug 17
TAP AIR PORTUGAL Logo
11:00 pm - 6:30 pm
EWR
-
TRS
37h 30m
2 stops
TAP AIR PORTUGAL Logo
11:15 am - 3:30 pm
TRS
-
EWR
34h 15m
2 stops
$872TAP AIR PORTUGAL
Wed, Aug 5 - Mon, Aug 17
KLM Logo
10:05 am - 2:30 pm
HOU
-
TRS
21h 25m
2 stops
KLM Logo
6:35 am - 9:35 pm
TRS
-
HOU
22h 00m
2 stops
$1,718KLM
Wed, Sep 2 - Tue, Sep 15

KLM flights from United States to Trieste

Our best KLM deals on United States to Trieste flight tickets
KLM
Apr 28
BOS1:30 pmBoston Logan Intl
19h 00m
2 stops
TRS2:30 pmTrieste Ronchi dei Legionari
May 5
TRS6:35 amTrieste Ronchi dei Legionari
15h 55m
1 stop
BOS4:30 pmBoston Logan Intl
$662
KLM
Jun 29
BOS4:40 pmBoston Logan Intl
19h 50m
1 stop
TRS6:30 pmTrieste Ronchi dei Legionari
Jul 8
TRS6:35 amTrieste Ronchi dei Legionari
18h 41m
2 stops
BOS7:16 pmBoston Logan Intl
$933
KLM
Jun 29
BOS4:40 pmBoston Logan Intl
19h 50m
1 stop
TRS6:30 pmTrieste Ronchi dei Legionari
Jul 8
TRS6:35 amTrieste Ronchi dei Legionari
18h 41m
2 stops
BOS7:16 pmBoston Logan Intl
$1,002

Lufthansa flights from United States to Trieste

Our best Lufthansa deals on United States to Trieste flight tickets
Lufthansa
Apr 29
LAX3:05 pmLos Angeles
22h 20m
1 stop
TRS10:25 pmTrieste Ronchi dei Legionari
May 14
TRS2:40 pmTrieste Ronchi dei Legionari
18h 19m
2 stops
LAX11:59 pmLos Angeles
$780
Lufthansa
Apr 5
LAX3:05 pmLos Angeles
13h 40m
1 stop
TRS1:45 pmTrieste Ronchi dei Legionari
Apr 14
TRS2:45 pmTrieste Ronchi dei Legionari
31h 25m
1 stop
LAX1:10 pmLos Angeles
$784
Lufthansa
Apr 29
LAX5:30 pmLos Angeles
19h 55m
2 stops
TRS10:25 pmTrieste Ronchi dei Legionari
May 14
TRS2:40 pmTrieste Ronchi dei Legionari
18h 19m
2 stops
LAX11:59 pmLos Angeles
$798

momondo Fare Finder

 
Customize your flight search to find flights from United States 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 March 26, 2026.
Use the filters below to find and compare flights from the United States to Trieste that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

BostonTrieste

BOS - TRS

BOSTRS

Boston Logan Intl

Tue 4/28

5:05 pm-10:25 am

1 stop11h 20m

Trieste Ronchi dei Legionari

Tue 5/5

6:35 am-1:40 pm

1 stop13h 05m

$621

New YorkTrieste

JFK - TRS

JFKTRS

New York John F Kennedy Intl

Thu 4/16

9:10 pm-6:30 pm

1 stop15h 20m

Trieste Ronchi dei Legionari

Mon 4/20

11:15 am-1:15 pm

1 stop32h 00m

$626

New YorkTrieste

JFK - TRS

JFKTRS

New York John F Kennedy Intl

Thu 4/16

6:20 pm-11:00 pm

1 stop22h 40m

Trieste Ronchi dei Legionari

Mon 4/20

11:25 am-10:30 pm

2 stops17h 05m

$652

New YorkTrieste

JFK - TRS

JFKTRS

New York John F Kennedy Intl

Thu 5/7

5:10 pm-8:15 pm

2 stops21h 05m

Trieste Ronchi dei Legionari

Thu 5/14

10:30 am-3:40 pm

2 stops35h 10m

$658

BostonTrieste

BOS - TRS

BOSTRS

Boston Logan Intl

Tue 4/28

1:30 pm-2:30 pm

2 stops19h 00m

Trieste Ronchi dei Legionari

Tue 5/5

6:35 am-4:30 pm

1 stop15h 55m

$662

Los AngelesTrieste

LAX - TRS

LAXTRS

Los Angeles

Wed 4/29

3:05 pm-10:25 pm

1 stop22h 20m

Trieste Ronchi dei Legionari

Thu 5/14

2:40 pm-11:59 pm

2 stops18h 19m

$780

Los AngelesTrieste

LAX - TRS

LAXTRS

Los Angeles

Sun 4/5

3:05 pm-1:45 pm

1 stop13h 40m

Trieste Ronchi dei Legionari

Tue 4/14

2:45 pm-1:10 pm

1 stop31h 25m

$784

NewarkTrieste

EWR - TRS

EWRTRS

Newark

Tue 8/4

11:00 pm-6:30 pm

2 stops37h 30m

Trieste Ronchi dei Legionari

Mon 8/17

6:35 am-3:30 pm

2 stops38h 55m

$842

NewarkTrieste

EWR - TRS

EWRTRS

Newark

Wed 8/5

11:00 pm-6:30 pm

2 stops37h 30m

Trieste Ronchi dei Legionari

Mon 8/17

11:15 am-3:30 pm

2 stops34h 15m

$872

HoustonTrieste

HOU - TRS

HOUTRS

Houston Hobby

Wed 9/2

10:05 am-2:30 pm

2 stops21h 25m

Trieste Ronchi dei Legionari

Tue 9/15

6:35 am-9:35 pm

2 stops22h 00m

$1,718

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 Trieste from

How to get the cheapest flight ticket from United States 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 month to fly to Trieste?

The cheapest month to fly to Trieste from United States is in February. Flight prices, which tend to average around $551, are often lower during this time because this is during the off-season. If you don’t want to visit Trieste in February, then you should wait until November to fly from United States, when ticket prices are also cheap, with an average price of $587.

Can stopping save me money on United States to Trieste flights?

You could potentially save up to 8% on your flight if you consider stops on a United States to Trieste flight.

Cheap United States to Trieste flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from United States to Trieste

Fastest flight time

9h 55m

Direct flights

None
The fastest flight from United States to Trieste takes 9h 55m
There are no direct flights from United States to Trieste. There are no popular flight routes from United States to Trieste.
Search flight deals

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

    Prices for flights from United States to Trieste Ronchi dei Legionari Airport refresh daily.

  • How many operators does momondo search for flights from United States to Trieste Ronchi dei Legionari Airport?

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from United States 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.

Best airlines flying from United States to Trieste

Compare and see reviews for airlines that fly from United States to Trieste with momondo
Airline
Rating
Free Cancellation
Price
ITA AirwaysPriceFrom $427Free CancellationRating
6.7
1,173 reviews
Search ITA Airways flights
LufthansaPriceFrom $513Free CancellationRating
6.8
7,871 reviews
Search Lufthansa flights

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 United States to Trieste?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Trieste from United States.

Can I find flights from United States to Trieste with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Trieste from United States with this policy.

How can momondo help me find flights from United States to Trieste?

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

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

Yes. momondo can track prices for United States to Trieste flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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