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$723+ Cheap flights from Philadelphia (PHL) to Trieste (TRS)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/5. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — TRS
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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Cheap flight deals from Philadelphia to Trieste

Discover tips and strategies to find the most affordable flight options for your journey from Philadelphia (PHL) to Trieste (TRS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated October 30, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$723
(KLM)
Provider with most accurate pricing for Philadelphia-Trieste Ronchi dei Legionari flight deals.
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Provider most trusted by Cheapflights users for Philadelphia-Trieste Ronchi dei Legionari flights.
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From Philadelphia to Trieste Ronchi dei Legionari
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Find flight deals from Philadelphia to Trieste

Cheapest flights from Philadelphia to Trieste
Explore the most affordable flight options available from Philadelphia to Trieste. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 30, 2025.

This KLM deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/510:32 amPHL - TRS
2 stops21h 58mKLM
Tue 12/93:15 pmTRS - PHL
2 stops37h 32mKLM
Deal found 10/28$723

Cheapflights Fare Finder

 
Customize your flight search to find flights from Philadelphia 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, Cheapflights users made 2,558,603 searches. Data last updated October 30, 2025.
Use the filters below to find and compare flights from Philadelphia to Trieste that are best for you.

Fly from

Philadelphia

Fly to

Trieste

Route

Depart

Return

Price

PhiladelphiaTrieste

PHL - TRS

PHLTRS

Philadelphia

Fri 12/5

10:32 am-2:30 pm

2 stops21h 58m

Trieste Ronchi dei Legionari

Tue 12/9

3:15 pm-10:47 pm

2 stops37h 32m

$723

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/28

Compare providers for flights from Philadelphia to Trieste

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Philadelphia to Trieste in October.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
AranGrantPrice Accuracy2 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*2 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Philadelphia-Trieste flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Philadelphia-Trieste flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Philadelphia-Trieste flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Philadelphia-Trieste flights, Cheapflights users trust AranGrant the most. AranGrant has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Philadelphia-Trieste flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Philadelphia to Trieste

Have a flexible travel schedule? Discover the best time to fly to Trieste from Philadelphia with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Philadelphia to Trieste

What is the cheapest month to book a flight from Philadelphia to Trieste?

Currently, May is the cheapest month in which you can book a flight from Philadelphia to Trieste (average of $341). Flying from Philadelphia to Trieste in June is currently the most expensive (average of $647). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Related info for your journey

Find useful and relevant information for your journey from Philadelphia to Trieste. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Philadelphia to Trieste?

    A quick flight from Philadelphia to Trieste can take about 21h 58m. KLM provides one of the quickest options available for as low as $723. The distance between Philadelphia and Trieste is about 4271 mi.

  • Can I find deals for flights from Philadelphia to Trieste that include hotel bookings?

    Yes. In addition to deals on Philadelphia to Trieste flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Philadelphia to Trieste?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Philadelphia to Trieste.

  • Can I find deals for business class flights from Philadelphia to Trieste?

    Yes. Cheapflights offers flight deals from Philadelphia to Trieste by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Philadelphia to Trieste?

    Currently, May is the cheapest month in which you can book a flight from Philadelphia to Trieste (average of $341). Flying from Philadelphia to Trieste in June is currently the most expensive (average of $647). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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