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Cheap flights from Boston to Trieste from $543

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Boston to Trieste departing on 1/31. 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 Boston to Trieste

Cheap round-trip flights

Enter your travel dates to find the best prices.
KLM Logo
4:45 pm - 6:30 pm
BOS
-
TRS
19h 45m2 stops
KLM Logo
6:35 am - 10:47 pm
TRS
-
BOS
22h 12m2 stops
$543KLM
Sat, Jan 31 - Sat, Feb 7
Lufthansa Logo
4:15 pm - 2:05 pm
BOS
-
TRS
15h 50m1 stop
Lufthansa Logo
6:25 am - 1:35 pm
TRS
-
BOS
13h 10m1 stop
$573Lufthansa
Sat, Jan 31 - Sat, Feb 7
Lufthansa Logo
2:27 pm - 2:05 pm
BOS
-
TRS
17h 38m2 stops
Lufthansa Logo
6:25 am - 1:35 pm
TRS
-
BOS
13h 10m1 stop
$578Lufthansa
Sat, Jan 31 - Sat, Feb 7
Multiple Airlines Logo
6:05 pm - 10:55 pm
BOS
-
TRS
22h 50m3 stops
Multiple Airlines Logo
6:35 am - 2:35 pm
TRS
-
BOS
38h 00m3 stops
$601Multiple Airlines
Sat, Jan 31 - Sat, Feb 7
Lufthansa Logo
8:40 pm - 6:30 pm
BOS
-
TRS
39h 50m2 stops
Lufthansa Logo
11:15 am - 7:08 pm
TRS
-
BOS
37h 53m2 stops
$625Lufthansa
Fri, Feb 27 - Thu, Mar 5
Lufthansa Logo
8:40 pm - 6:30 pm
BOS
-
TRS
39h 50m2 stops
Lufthansa Logo
3:15 pm - 7:08 pm
TRS
-
BOS
33h 53m2 stops
$635Lufthansa
Fri, Feb 27 - Thu, Mar 5
Lufthansa Logo
4:15 pm - 6:30 pm
BOS
-
TRS
44h 15m2 stops
Lufthansa Logo
3:15 pm - 7:08 pm
TRS
-
BOS
33h 53m2 stops
$647Lufthansa
Fri, Feb 27 - Thu, Mar 5
Lufthansa Logo
8:40 pm - 6:30 pm
BOS
-
TRS
39h 50m2 stops
Lufthansa Logo
2:50 pm - 1:10 pm
TRS
-
BOS
28h 20m1 stop
$662Lufthansa
Fri, Feb 27 - Thu, Mar 5
Multiple Airlines Logo
7:50 pm - 8:40 pm
BOS
-
TRS
18h 50m2 stops
Multiple Airlines Logo
3:00 pm - 5:50 pm
TRS
-
BOS
32h 50m3 stops
$663Multiple Airlines
Sat, Jan 31 - Sat, Feb 7
Lufthansa Logo
8:40 pm - 6:30 pm
BOS
-
TRS
39h 50m2 stops
Lufthansa Logo
2:50 pm - 1:10 pm
TRS
-
BOS
28h 20m1 stop
$671Lufthansa
Fri, Feb 27 - Thu, Mar 5

Lufthansa flights from Boston to Trieste

Our best Lufthansa deals on Boston to Trieste flight tickets
Lufthansa
Jan 31
BOS4:15 pmBoston Logan Intl
15h 50m
1 stop
TRS2:05 pmTrieste Ronchi dei Legionari
Feb 7
TRS6:25 amTrieste Ronchi dei Legionari
13h 10m
1 stop
BOS1:35 pmBoston Logan Intl
$573
Find similar
Lufthansa
Jan 31
BOS2:27 pmBoston Logan Intl
17h 38m
2 stops
TRS2:05 pmTrieste Ronchi dei Legionari
Feb 7
TRS6:25 amTrieste Ronchi dei Legionari
13h 10m
1 stop
BOS1:35 pmBoston Logan Intl
$578
Find similar
Lufthansa
Feb 27
BOS8:40 pmBoston Logan Intl
39h 50m
2 stops
TRS6:30 pmTrieste Ronchi dei Legionari
Mar 5
TRS11:15 amTrieste Ronchi dei Legionari
37h 53m
2 stops
BOS7:08 pmBoston Logan Intl
$625
Find similar

TAP AIR PORTUGAL flights from Boston to Trieste

Our best TAP AIR PORTUGAL deals on Boston to Trieste flight tickets
TAP AIR PORTUGAL
Feb 4
BOS6:05 pmBoston Logan Intl
42h 25m
2 stops
TRS6:30 pmTrieste Ronchi dei Legionari
Feb 8
TRS11:15 amTrieste Ronchi dei Legionari
57h 30m
2 stops
BOS2:45 pmBoston Logan Intl
$841
Find similar
TAP AIR PORTUGAL
Feb 4
BOS6:05 pmBoston Logan Intl
42h 25m
2 stops
TRS6:30 pmTrieste Ronchi dei Legionari
Feb 8
TRS11:15 amTrieste Ronchi dei Legionari
57h 30m
2 stops
BOS2:45 pmBoston Logan Intl
$932
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Boston 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 December 18, 2025.
Use the filters below to find and compare flights from Boston to Trieste that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

BostonTrieste

BOS - TRS

BOSTRS

Boston Logan Intl

Sat 1/31

4:45 pm-6:30 pm

2 stops19h 45m

Trieste Ronchi dei Legionari

Sat 2/7

6:35 am-10:47 pm

2 stops22h 12m

$543

BostonTrieste

BOS - TRS

BOSTRS

Boston Logan Intl

Sat 1/31

4:15 pm-2:05 pm

1 stop15h 50m

Trieste Ronchi dei Legionari

Sat 2/7

6:25 am-1:35 pm

1 stop13h 10m

$573

BostonTrieste

BOS - TRS

BOSTRS

Boston Logan Intl

Sat 1/31

2:27 pm-2:05 pm

2 stops17h 38m

Trieste Ronchi dei Legionari

Sat 2/7

6:25 am-1:35 pm

1 stop13h 10m

$578

BostonTrieste

BOS - TRS

BOSTRS

Boston Logan Intl

Sat 1/31

6:05 pm-10:55 pm

3 stops22h 50m

Trieste Ronchi dei Legionari

Sat 2/7

6:35 am-2:35 pm

3 stops38h 00m

$601

BostonTrieste

BOS - TRS

BOSTRS

Boston Logan Intl

Fri 2/27

8:40 pm-6:30 pm

2 stops39h 50m

Trieste Ronchi dei Legionari

Thu 3/5

11:15 am-7:08 pm

2 stops37h 53m

$625

BostonTrieste

BOS - TRS

BOSTRS

Boston Logan Intl

Fri 2/27

8:40 pm-6:30 pm

2 stops39h 50m

Trieste Ronchi dei Legionari

Thu 3/5

3:15 pm-7:08 pm

2 stops33h 53m

$635

BostonTrieste

BOS - TRS

BOSTRS

Boston Logan Intl

Fri 2/27

4:15 pm-6:30 pm

2 stops44h 15m

Trieste Ronchi dei Legionari

Thu 3/5

3:15 pm-7:08 pm

2 stops33h 53m

$647

BostonTrieste

BOS - TRS

BOSTRS

Boston Logan Intl

Fri 2/27

8:40 pm-6:30 pm

2 stops39h 50m

Trieste Ronchi dei Legionari

Thu 3/5

2:50 pm-1:10 pm

1 stop28h 20m

$662

BostonTrieste

BOS - TRS

BOSTRS

Boston Logan Intl

Sat 1/31

7:50 pm-8:40 pm

2 stops18h 50m

Trieste Ronchi dei Legionari

Sat 2/7

3:00 pm-5:50 pm

3 stops32h 50m

$663

BostonTrieste

BOS - TRS

BOSTRS

Boston Logan Intl

Fri 2/27

8:40 pm-6:30 pm

2 stops39h 50m

Trieste Ronchi dei Legionari

Thu 3/5

2:50 pm-1:10 pm

1 stop28h 20m

$671

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 11 resultsSorted by cheapest first
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See travel insights to Trieste from

How to get the cheapest flight ticket from Boston 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 day to depart on your flight to Trieste?

The cheapest day to depart on your flight to Trieste is on a Tuesday when prices can be found for as low as $800. This is often the case because there is less demand to fly during this day of the week. Flights from Boston to Trieste on a Wednesday will generally be more expensive and average around $1,206. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Trieste?

Our most recent data shows that the best time of day to fly to Trieste is in the afternoon. Flights from Boston to Trieste during this time can be as low as $1,048. Flights to Trieste are more costly in the evening, with an average ticket price of $1,147. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

When to book flights from Boston to Trieste

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

Cheap Boston to Trieste (BOS to TRS) flight deals and tips

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

Fastest flight time

16h 25m

Direct flights

None
The fastest flight from Boston to Trieste takes 16h 25m
There are no direct flights from Boston to Trieste. There are no popular flight routes from Boston to Trieste.
Search flight deals

  • How far is Boston Logan Intl to Trieste Ronchi dei Legionari by plane?

    There are 4011.9 mi between Boston Logan Intl and Trieste Ronchi dei Legionari. Flights usually cover this in 16h 25m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Boston Logan Intl Airport to Trieste Ronchi dei Legionari Airport?

    Prices for flights from Boston Logan Intl Airport to Trieste Ronchi dei Legionari Airport are updated daily.

  • How many operators does momondo search for flights from Boston Logan Intl Airport to Trieste Ronchi dei Legionari Airport?

  • How old do you have to be to fly from Boston Logan Intl Airport 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 Boston Logan Intl Airport to Trieste Ronchi dei Legionari Airport.

  • What documentation or ID do you need to fly to Trieste Ronchi dei Legionari Airport?

    The required travel and health documents for your Trieste Ronchi dei Legionari Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Trieste Ronchi dei Legionari Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular airline from Boston to Trieste?

Best airlines flying from Boston to Trieste

Compare and see reviews for airlines that fly from Boston to Trieste with momondo
Airline
Rating
Free Cancellation
Price
ITA AirwaysPriceFrom $427Free CancellationRating
6.7
1,107 reviews
Search ITA Airways flights
LufthansaPriceFrom $513Free CancellationRating
6.8
7,634 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 Boston to Trieste?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Boston to Trieste for you.

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

Yes. momondo allows you to filter the results for Boston to Trieste flights to just show those with flexible booking policies.

How can momondo help me find flights from Boston to Trieste?

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

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

Price alerts on flights to Trieste from Boston are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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