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

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

How old do you have to be to fly from Philadelphia Airport to Trieste Ronchi dei Legionari Airport?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Philadelphia 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.

$737 Cheap Flights from Philadelphia to Trieste in 2026

Find the cheapest flights from Philadelphia to Trieste

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

3:46 pm - 2:30 pmPHL Philadelphia-TRS Trieste Ronchi dei Legionari

16h 44m2 stops Atlanta Hartsfield-Jackson Rome Fiumicino

6:35 am - 12:56 amTRS Trieste Ronchi dei Legionari-PHL Philadelphia

23h 21m2 stops Rome Fiumicino Atlanta Hartsfield-Jackson

$878KLM

Wed, Oct 21 - Wed, Oct 28

12:15 pm - 2:30 pmPHL Philadelphia-TRS Trieste Ronchi dei Legionari

20h 15m2 stops Atlanta Hartsfield-Jackson Rome Fiumicino

6:35 am - 12:56 amTRS Trieste Ronchi dei Legionari-PHL Philadelphia

23h 21m2 stops Rome Fiumicino Atlanta Hartsfield-Jackson

$928KLM

Thu, Oct 22 - Thu, Oct 29

9:45 am - 10:25 amPHL Philadelphia-TRS Trieste Ronchi dei Legionari

18h 40m2 stops Chicago O'Hare Intl Rome Fiumicino

6:35 am - 2:44 pmTRS Trieste Ronchi dei Legionari-PHL Philadelphia

38h 09m2 stops Rome Fiumicino Montreal Pierre Elliott Trudeau Intl

$997United Airlines

Tue, Dec 8 - Fri, Dec 11

9:45 am - 10:25 amPHL Philadelphia-TRS Trieste Ronchi dei Legionari

18h 40m2 stops Chicago O'Hare Intl Rome Fiumicino

6:35 am - 2:44 pmTRS Trieste Ronchi dei Legionari-PHL Philadelphia

38h 09m2 stops Rome Fiumicino Montreal Pierre Elliott Trudeau Intl

$1,017United Airlines

Tue, Dec 8 - Fri, Dec 11

7:25 pm - 6:30 pmPHL Philadelphia-TRS Trieste Ronchi dei Legionari

17h 05m1 stop Rome Fiumicino

7:15 pm - 5:50 pmTRS Trieste Ronchi dei Legionari-PHL Philadelphia

27h 35m1 stop Rome Fiumicino

$1,067Multiple Airlines

Thu, Mar 4 - Sun, Mar 14

1:48 pm - 2:30 pmPHL Philadelphia-TRS Trieste Ronchi dei Legionari

18h 42m2 stops Charlotte Douglas Rome Fiumicino

3:15 pm - 5:50 pmTRS Trieste Ronchi dei Legionari-PHL Philadelphia

31h 35m1 stop Rome Fiumicino

$1,074Multiple Airlines

Thu, Mar 4 - Sun, Mar 14

4:35 pm - 10:25 amPHL Philadelphia-TRS Trieste Ronchi dei Legionari

35h 50m2 stops Toronto Pearson Intl Rome Fiumicino

6:35 am - 1:42 pmTRS Trieste Ronchi dei Legionari-PHL Philadelphia

37h 07m2 stops Rome Fiumicino Montreal Pierre Elliott Trudeau Intl

$1,126United Airlines

Thu, Mar 4 - Sun, Mar 14

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United Airlines flights from Philadelphia to Trieste

Our best United Airlines deals on Philadelphia to Trieste flight tickets

United Airlines

Dec 8

PHL9:45 amPhiladelphia

18h 40m

2 stops

TRS10:25 amTrieste Ronchi dei Legionari

Dec 11

TRS6:35 amTrieste Ronchi dei Legionari

38h 09m

2 stops

PHL2:44 pmPhiladelphia

$997

United Airlines

Dec 8

PHL9:45 amPhiladelphia

18h 40m

2 stops

TRS10:25 amTrieste Ronchi dei Legionari

Dec 11

TRS6:35 amTrieste Ronchi dei Legionari

38h 09m

2 stops

PHL2:44 pmPhiladelphia

$1,017

United Airlines

Mar 4

PHL4:35 pmPhiladelphia

35h 50m

2 stops

TRS10:25 amTrieste Ronchi dei Legionari

Mar 14

TRS6:35 amTrieste Ronchi dei Legionari

37h 07m

2 stops

PHL1:42 pmPhiladelphia

$1,126

KLM flights from Philadelphia to Trieste

Our best KLM deals on Philadelphia to Trieste flight tickets

KLM

Oct 21

PHL3:46 pmPhiladelphia

16h 44m

2 stops

TRS2:30 pmTrieste Ronchi dei Legionari

Oct 28

TRS6:35 amTrieste Ronchi dei Legionari

23h 21m

2 stops

PHL12:56 amPhiladelphia

$878

KLM

Oct 22

PHL12:15 pmPhiladelphia

20h 15m

2 stops

TRS2:30 pmTrieste Ronchi dei Legionari

Oct 29

TRS6:35 amTrieste Ronchi dei Legionari

23h 21m

2 stops

PHL12:56 amPhiladelphia

$928

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

PhiladelphiaTrieste

PHL Philadelphia - TRS Trieste Ronchi dei Legionari

PHLTRS

Philadelphia

Wed 10/21

3:46 pm-2:30 pm

2 stops16h 44m

Trieste Ronchi dei Legionari

Wed 10/28

6:35 am-12:56 am

2 stops23h 21m

$878

PhiladelphiaTrieste

PHL Philadelphia - TRS Trieste Ronchi dei Legionari

PHLTRS

Philadelphia

Thu 10/22

12:15 pm-2:30 pm

2 stops20h 15m

Trieste Ronchi dei Legionari

Thu 10/29

6:35 am-12:56 am

2 stops23h 21m

$928

PhiladelphiaTrieste

PHL Philadelphia - TRS Trieste Ronchi dei Legionari

PHLTRS

Philadelphia

Tue 12/8

9:45 am-10:25 am

2 stops18h 40m

Trieste Ronchi dei Legionari

Fri 12/11

6:35 am-2:44 pm

2 stops38h 09m

$997

PhiladelphiaTrieste

PHL Philadelphia - TRS Trieste Ronchi dei Legionari

PHLTRS

Philadelphia

Tue 12/8

9:45 am-10:25 am

2 stops18h 40m

Trieste Ronchi dei Legionari

Fri 12/11

6:35 am-2:44 pm

2 stops38h 09m

$1,017

PhiladelphiaTrieste

PHL Philadelphia - TRS Trieste Ronchi dei Legionari

PHLTRS

Philadelphia

Thu 3/4

7:25 pm-6:30 pm

1 stop17h 05m

Trieste Ronchi dei Legionari

Sun 3/14

7:15 pm-5:50 pm

1 stop27h 35m

$1,067

PhiladelphiaTrieste

PHL Philadelphia - TRS Trieste Ronchi dei Legionari

PHLTRS

Philadelphia

Thu 3/4

1:48 pm-2:30 pm

2 stops18h 42m

Trieste Ronchi dei Legionari

Sun 3/14

3:15 pm-5:50 pm

1 stop31h 35m

$1,074

PhiladelphiaTrieste

PHL Philadelphia - TRS Trieste Ronchi dei Legionari

PHLTRS

Philadelphia

Thu 3/4

4:35 pm-10:25 am

2 stops35h 50m

Trieste Ronchi dei Legionari

Sun 3/14

6:35 am-1:42 pm

2 stops37h 07m

$1,126

Cheapest one-way

PhiladelphiaTrieste

PHL Philadelphia - TRS Trieste Ronchi dei Legionari

PHLTRS

Philadelphia

Fri 9/11

7:00 am-5:00 pm

3 stops28h 00m

$737

PhiladelphiaTrieste

PHL Philadelphia - TRS Trieste Ronchi dei Legionari

PHLTRS

Philadelphia

Fri 9/11

7:00 am-1:55 pm

2 stops24h 55m

$794

Quickest one-way

PhiladelphiaTrieste

PHL Philadelphia - TRS Trieste Ronchi dei Legionari

PHLTRS

Philadelphia

Fri 9/11

5:40 pm-1:55 pm

1 stop14h 15m

$799

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

How to get the cheapest flight ticket from Philadelphia 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 airlines fly to Trieste?

United Airlines, Delta and ITA Airways are the top three most popular airlines that fly to Trieste from Philadelphia according to our data. United Airlines is the first choice among our users, with 35% of people opting to fly with this airline when traveling to Trieste. Keep in mind that there are 18 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 Philadelphia to Trieste

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

Estimated round-trip price

Cheap Philadelphia to Trieste (PHL to TRS) flight deals and tips

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

Best Price Found	$737
Fastest flight time	16h 20m
Direct flights	None

The best one-way flight to Trieste from Philadelphia in the past 72 hours is $737. The best round-trip flight deal from Philadelphia to Trieste found on momondo in the last 72 hours is $878.

The fastest flight from Philadelphia to Trieste takes 16h 20m

There are no direct flights from Philadelphia to Trieste. There are no popular flight routes from Philadelphia to Trieste.

Search flight deals

Frequently asked questions about flying from Philadelphia to Trieste

How far is Philadelphia to Trieste Ronchi dei Legionari by plane?
Philadelphia and Trieste Ronchi dei Legionari are 4281.7 mi apart from one another. A reasonable flight in good conditions will take 16h 20m.
When did momondo last update prices for flights from Philadelphia Airport to Trieste Ronchi dei Legionari Airport?
Prices for flights from Philadelphia Airport to Trieste Ronchi dei Legionari Airport are refreshed on a daily basis.
How old do you have to be to fly from Philadelphia Airport to Trieste Ronchi dei Legionari Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Philadelphia 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.

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Why use momondo?

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

It is quick and easy to find Philadelphia 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 Philadelphia to Trieste with flexible booking policies on momondo?

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

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

Once you have performed a search for Philadelphia to Trieste flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

If you are not ready to book a flight from Philadelphia to Trieste now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Trieste and let you know when they change.