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Cheap flights from the United States to Trieste from $316

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 7/23. 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
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
$643ITA Airways
Tue, Jul 28 - Tue, Aug 25
ITA Airways Logo
5:05 pm - 10:25 am
BOS
-
TRS
11h 20m
1 stop
ITA Airways Logo
7:15 pm - 1:40 pm
TRS
-
BOS
24h 25m
1 stop
$668ITA Airways
Mon, Aug 3 - Mon, Aug 24
Lufthansa Logo
9:25 am - 1:45 pm
BOS
-
TRS
22h 20m
2 stops
Lufthansa Logo
2:45 pm - 8:10 pm
TRS
-
BOS
11h 25m
1 stop
$692Lufthansa
Tue, Jul 28 - Tue, Aug 25
Lufthansa Logo
9:25 am - 1:45 pm
BOS
-
TRS
22h 20m
2 stops
Lufthansa Logo
6:20 am - 11:54 pm
TRS
-
BOS
23h 34m
2 stops
$709Lufthansa
Tue, Jul 28 - Tue, Aug 25
Multiple Airlines Logo
12:30 am - 6:30 pm
JFK
-
TRS
12h 00m
1 stop
Multiple Airlines Logo
3:15 pm - 10:30 pm
TRS
-
JFK
13h 15m
1 stop
$732Multiple Airlines
Mon, Oct 5 - Tue, Oct 20
TAP AIR PORTUGAL Logo
5:30 pm - 6:30 pm
EWR
-
TRS
19h 00m
2 stops
TAP AIR PORTUGAL Logo
6:35 am - 9:00 pm
TRS
-
EWR
20h 25m
2 stops
$795TAP AIR PORTUGAL
Tue, Oct 6 - Tue, Oct 20
Multiple Airlines Logo
8:30 pm - 8:15 pm
JFK
-
TRS
17h 45m
2 stops
Multiple Airlines Logo
6:35 am - 1:15 pm
TRS
-
JFK
12h 40m
1 stop
$807Multiple Airlines
Thu, Oct 1 - Sun, Oct 11
TAP AIR PORTUGAL Logo
11:00 pm - 6:30 pm
EWR
-
TRS
37h 30m
2 stops
TAP AIR PORTUGAL Logo
3:15 pm - 3:20 pm
TRS
-
EWR
54h 05m
2 stops
$827TAP AIR PORTUGAL
Mon, Oct 19 - Sun, Nov 8
KLM Logo
5:00 pm - 6:30 pm
IAD
-
TRS
19h 30m
2 stops
KLM Logo
3:15 pm - 11:02 pm
TRS
-
IAD
36h 47m
2 stops
$1,068KLM
Mon, Oct 19 - Mon, Oct 26
KLM Logo
1:06 pm - 2:30 pm
HOU
-
TRS
18h 24m
2 stops
KLM Logo
6:35 am - 9:43 pm
TRS
-
HOU
22h 08m
2 stops
$2,677KLM
Tue, May 26 - Fri, Jun 19

TAP AIR PORTUGAL flights from United States to Trieste

Our best TAP AIR PORTUGAL deals on United States to Trieste flight tickets
TAP AIR PORTUGAL
Oct 19
EWR11:00 pmNewark
37h 30m
2 stops
TRS6:30 pmTrieste Ronchi dei Legionari
Nov 8
TRS3:15 pmTrieste Ronchi dei Legionari
54h 05m
2 stops
EWR3:20 pmNewark
$827
TAP AIR PORTUGAL
Oct 20
JFK10:05 pmNew York John F Kennedy Intl
38h 25m
2 stops
TRS6:30 pmTrieste Ronchi dei Legionari
Nov 7
TRS6:35 amTrieste Ronchi dei Legionari
19h 30m
2 stops
JFK8:05 pmNew York John F Kennedy Intl
$840
TAP AIR PORTUGAL
Oct 19
EWR11:00 pmNewark
37h 30m
2 stops
TRS6:30 pmTrieste Ronchi dei Legionari
Nov 7
TRS11:15 amTrieste Ronchi dei Legionari
58h 05m
2 stops
EWR3:20 pmNewark
$847

ITA Airways flights from United States to Trieste

Our best ITA Airways deals on United States to Trieste flight tickets
ITA Airways
Jul 28
BOS5:05 pmBoston Logan Intl
11h 20m
1 stop
TRS10:25 amTrieste Ronchi dei Legionari
Aug 25
TRS6:35 amTrieste Ronchi dei Legionari
13h 05m
1 stop
BOS1:40 pmBoston Logan Intl
$643
ITA Airways
Jul 13
BOS9:35 pmBoston Logan Intl
10h 55m
1 stop
TRS2:30 pmTrieste Ronchi dei Legionari
Aug 24
TRS7:15 pmTrieste Ronchi dei Legionari
24h 25m
1 stop
BOS1:40 pmBoston Logan Intl
$668
ITA Airways
Aug 12
BOS5:05 pmBoston Logan Intl
11h 20m
1 stop
TRS10:25 amTrieste Ronchi dei Legionari
Aug 19
TRS7:15 pmTrieste Ronchi dei Legionari
24h 25m
1 stop
BOS1:40 pmBoston Logan Intl
$698

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 May 10, 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 7/28

5:05 pm-10:25 am

1 stop11h 20m

Trieste Ronchi dei Legionari

Tue 8/25

6:35 am-1:40 pm

1 stop13h 05m

$643

BostonTrieste

BOS - TRS

BOSTRS

Boston Logan Intl

Mon 8/3

5:05 pm-10:25 am

1 stop11h 20m

Trieste Ronchi dei Legionari

Mon 8/24

7:15 pm-1:40 pm

1 stop24h 25m

$668

BostonTrieste

BOS - TRS

BOSTRS

Boston Logan Intl

Tue 7/28

9:25 am-1:45 pm

2 stops22h 20m

Trieste Ronchi dei Legionari

Tue 8/25

2:45 pm-8:10 pm

1 stop11h 25m

$692

BostonTrieste

BOS - TRS

BOSTRS

Boston Logan Intl

Tue 7/28

9:25 am-1:45 pm

2 stops22h 20m

Trieste Ronchi dei Legionari

Tue 8/25

6:20 am-11:54 pm

2 stops23h 34m

$709

New YorkTrieste

JFK - TRS

JFKTRS

New York John F Kennedy Intl

Mon 10/5

12:30 am-6:30 pm

1 stop12h 00m

Trieste Ronchi dei Legionari

Tue 10/20

3:15 pm-10:30 pm

1 stop13h 15m

$732

NewarkTrieste

EWR - TRS

EWRTRS

Newark

Tue 10/6

5:30 pm-6:30 pm

2 stops19h 00m

Trieste Ronchi dei Legionari

Tue 10/20

6:35 am-9:00 pm

2 stops20h 25m

$795

New YorkTrieste

JFK - TRS

JFKTRS

New York John F Kennedy Intl

Thu 10/1

8:30 pm-8:15 pm

2 stops17h 45m

Trieste Ronchi dei Legionari

Sun 10/11

6:35 am-1:15 pm

1 stop12h 40m

$807

NewarkTrieste

EWR - TRS

EWRTRS

Newark

Mon 10/19

11:00 pm-6:30 pm

2 stops37h 30m

Trieste Ronchi dei Legionari

Sun 11/8

3:15 pm-3:20 pm

2 stops54h 05m

$827

Washington, D.C.Trieste

IAD - TRS

IADTRS

Washington, D.C. Dulles Intl

Mon 10/19

5:00 pm-6:30 pm

2 stops19h 30m

Trieste Ronchi dei Legionari

Mon 10/26

3:15 pm-11:02 pm

2 stops36h 47m

$1,068

HoustonTrieste

HOU - TRS

HOUTRS

Houston Hobby

Tue 5/26

1:06 pm-2:30 pm

2 stops18h 24m

Trieste Ronchi dei Legionari

Fri 6/19

6:35 am-9:43 pm

2 stops22h 08m

$2,677

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 November. Flight prices, which tend to average around $427, are often lower during this time because this is during the off-season. If you don’t want to visit Trieste in November, then you should wait until February to fly from United States, when ticket prices are also cheap, with an average price of $455.

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

Frequently asked questions about flying from the United States to Trieste

  • 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
1,213 reviews
Search ITA Airways flights
LufthansaPriceFrom $513Free CancellationRating
6.8
7,985 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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