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Cheap flights from the United States to Trieste from $271

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 10/3. 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 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 - 6:30 pm
BOS
-
TRS
19h 25m
1 stop
ITA Airways Logo
11:15 am - 1:40 pm
TRS
-
BOS
32h 25m
1 stop
$645ITA Airways
Sun, Aug 9 - Tue, Aug 25
ITA Airways Logo
5:05 pm - 6:30 pm
BOS
-
TRS
19h 25m
1 stop
ITA Airways Logo
11:15 am - 1:40 pm
TRS
-
BOS
32h 25m
1 stop
$646ITA Airways
Sun, Aug 9 - Tue, Aug 25
Multiple Airlines Logo
6:20 pm - 8:15 pm
JFK
-
TRS
19h 55m
1 stop
Multiple Airlines Logo
7:10 pm - 3:55 pm
TRS
-
JFK
26h 45m
1 stop
$665Multiple Airlines
Tue, Aug 25 - Thu, Sep 17
Multiple Airlines Logo
6:20 pm - 8:15 pm
JFK
-
TRS
19h 55m
1 stop
Multiple Airlines Logo
9:10 pm - 7:10 pm
TRS
-
JFK
28h 00m
2 stops
$676Multiple Airlines
Tue, Aug 25 - Thu, Sep 17
TAP AIR PORTUGAL Logo
11:00 pm - 6:30 pm
EWR
-
TRS
37h 30m
2 stops
TAP AIR PORTUGAL Logo
3:15 pm - 3:30 pm
TRS
-
EWR
30h 15m
2 stops
$793TAP AIR PORTUGAL
Sun, Oct 4 - Tue, Oct 13
TAP AIR PORTUGAL Logo
11:00 pm - 6:30 pm
EWR
-
TRS
37h 30m
2 stops
TAP AIR PORTUGAL Logo
3:15 pm - 4:20 pm
TRS
-
EWR
54h 05m
2 stops
$813TAP AIR PORTUGAL
Mon, Oct 19 - Sat, Oct 31
Lufthansa Logo
4:20 pm - 2:05 pm
ORD
-
TRS
14h 45m
1 stop
Lufthansa Logo
2:45 pm - 8:05 pm
TRS
-
ORD
12h 20m
1 stop
$883Lufthansa
Thu, Nov 12 - Thu, Nov 26
Lufthansa Logo
4:20 pm - 2:05 pm
ORD
-
TRS
14h 45m
1 stop
Lufthansa Logo
2:45 pm - 8:05 pm
TRS
-
ORD
12h 20m
1 stop
$890Lufthansa
Thu, Nov 12 - Thu, Nov 26
KLM Logo
5:00 pm - 6:30 pm
DCA
-
TRS
19h 30m
2 stops
KLM Logo
6:35 am - 10:59 pm
TRS
-
DCA
22h 24m
2 stops
$1,104KLM
Mon, Aug 3 - Mon, Aug 10
KLM Logo
1:13 pm - 2:30 pm
HOU
-
TRS
18h 17m
2 stops
KLM Logo
6:35 am - 10:35 pm
TRS
-
HOU
23h 00m
2 stops
$2,158KLM
Wed, Sep 2 - Tue, Sep 15

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Lufthansa flights from United States to Trieste

Our best Lufthansa deals on United States to Trieste flight tickets
Lufthansa
Nov 12
ORD4:20 pmChicago O'Hare Intl
14h 45m
1 stop
TRS2:05 pmTrieste Ronchi dei Legionari
Nov 26
TRS2:45 pmTrieste Ronchi dei Legionari
12h 20m
1 stop
ORD8:05 pmChicago O'Hare Intl
$883
Lufthansa
Nov 12
ORD4:20 pmChicago O'Hare Intl
14h 45m
1 stop
TRS2:05 pmTrieste Ronchi dei Legionari
Nov 26
TRS2:45 pmTrieste Ronchi dei Legionari
12h 20m
1 stop
ORD8:05 pmChicago O'Hare Intl
$890
Lufthansa
Aug 8
IAD5:25 pmWashington, D.C. Dulles Intl
38h 20m
2 stops
TRS1:45 pmTrieste Ronchi dei Legionari
Aug 19
TRS6:10 amTrieste Ronchi dei Legionari
20h 58m
2 stops
IAD9:08 pmWashington, D.C. Dulles Intl
$905

United Airlines flights from United States to Trieste

Our best United Airlines deals on United States to Trieste flight tickets
United Airlines
Nov 30
ORD3:40 pmChicago O'Hare Intl
11h 45m
1 stop
TRS10:25 amTrieste Ronchi dei Legionari
Dec 4
TRS6:35 amTrieste Ronchi dei Legionari
13h 35m
1 stop
ORD1:10 pmChicago O'Hare Intl
$1,051
United Airlines
Nov 30
ORD3:40 pmChicago O'Hare Intl
11h 45m
1 stop
TRS10:25 amTrieste Ronchi dei Legionari
Dec 4
TRS6:35 amTrieste Ronchi dei Legionari
20h 35m
2 stops
ORD8:10 pmChicago O'Hare Intl
$1,055
United Airlines
Nov 30
ORD7:15 amChicago O'Hare Intl
44h 10m
2 stops
TRS10:25 amTrieste Ronchi dei Legionari
Dec 4
TRS6:35 amTrieste Ronchi dei Legionari
35h 35m
2 stops
ORD11:10 amChicago O'Hare Intl
$1,059

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 June 20, 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

BostonTrieste

BOS - TRS

BOSTRS

Boston Logan Intl

Sun 8/9

5:05 pm-6:30 pm

1 stop19h 25m

Trieste Ronchi dei Legionari

Tue 8/25

11:15 am-1:40 pm

1 stop32h 25m

$645

BostonTrieste

BOS - TRS

BOSTRS

Boston Logan Intl

Sun 8/9

5:05 pm-6:30 pm

1 stop19h 25m

Trieste Ronchi dei Legionari

Tue 8/25

11:15 am-1:40 pm

1 stop32h 25m

$646

New YorkTrieste

JFK - TRS

JFKTRS

New York John F Kennedy Intl

Tue 8/25

6:20 pm-8:15 pm

1 stop19h 55m

Trieste Ronchi dei Legionari

Thu 9/17

7:10 pm-3:55 pm

1 stop26h 45m

$665

New YorkTrieste

JFK - TRS

JFKTRS

New York John F Kennedy Intl

Tue 8/25

6:20 pm-8:15 pm

1 stop19h 55m

Trieste Ronchi dei Legionari

Thu 9/17

9:10 pm-7:10 pm

2 stops28h 00m

$676

NewarkTrieste

EWR - TRS

EWRTRS

Newark

Sun 10/4

11:00 pm-6:30 pm

2 stops37h 30m

Trieste Ronchi dei Legionari

Tue 10/13

3:15 pm-3:30 pm

2 stops30h 15m

$793

NewarkTrieste

EWR - TRS

EWRTRS

Newark

Mon 10/19

11:00 pm-6:30 pm

2 stops37h 30m

Trieste Ronchi dei Legionari

Sat 10/31

3:15 pm-4:20 pm

2 stops54h 05m

$813
Quickest round-trip

ChicagoTrieste

ORD - TRS

ORDTRS

Chicago O'Hare Intl

Thu 11/12

4:20 pm-2:05 pm

1 stop14h 45m

Trieste Ronchi dei Legionari

Thu 11/26

2:45 pm-8:05 pm

1 stop12h 20m

$883

ChicagoTrieste

ORD - TRS

ORDTRS

Chicago O'Hare Intl

Thu 11/12

4:20 pm-2:05 pm

1 stop14h 45m

Trieste Ronchi dei Legionari

Thu 11/26

2:45 pm-8:05 pm

1 stop12h 20m

$890

Washington, D.C.Trieste

DCA - TRS

DCATRS

Washington, D.C. Reagan-National

Mon 8/3

5:00 pm-6:30 pm

2 stops19h 30m

Trieste Ronchi dei Legionari

Mon 8/10

6:35 am-10:59 pm

2 stops22h 24m

$1,104

HoustonTrieste

HOU - TRS

HOUTRS

Houston Hobby

Wed 9/2

1:13 pm-2:30 pm

2 stops18h 17m

Trieste Ronchi dei Legionari

Tue 9/15

6:35 am-10:35 pm

2 stops23h 00m

$2,158

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

10h 45m

Direct flights

None
The fastest flight from United States to Trieste takes 10h 45m
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
1,262 reviews
Search ITA Airways flights
LufthansaPriceFrom $513Free CancellationRating
6.8
8,084 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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