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Trieste

$601+ 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 8/10. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — TRS
Feb 27 — Mar 61
Fri 2/27
Fri 3/6
1 adult, Economy
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Cheap 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 January 28, 2026.

This KAYAK deal was found by Cheapflights users on 1/26. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/105:40 pm
PHL
-
TRS
1 stop14h 15m
Lufthansa
Fri 8/286:00 am
TRS
-
PHL
1 stop16h 05m
Lufthansa
Deal found 1/26$601
This KAYAK deal was found by Cheapflights users on 1/26. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/105:40 pm
PHL
-
TRS
1 stop14h 15m
Lufthansa
Mon 8/242:50 pm
TRS
-
PHL
1 stop31h 15m
Lufthansa
Deal found 1/26$621
This Gotogate deal was found by Cheapflights users on 1/25. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/126:40 pm
PHL
-
TRS
1 stop14h 25m
Multiple Airlines
Thu 3/196:15 am
TRS
-
PHL
2 stops37h 32m
Multiple Airlines
Deal found 1/25$623
This KAYAK deal was found by Cheapflights users on 1/26. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/135:40 pm
PHL
-
TRS
1 stop14h 15m
Lufthansa
Tue 8/256:10 am
TRS
-
PHL
1 stop15h 55m
Lufthansa
Deal found 1/26$651
This KAYAK deal was found by Cheapflights users on 1/26. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/153:25 pm
PHL
-
TRS
2 stops24h 50m
Lufthansa
Thu 8/276:00 am
TRS
-
PHL
1 stop16h 05m
Lufthansa
Deal found 1/26$654
This KAYAK deal was found by Cheapflights users on 1/26. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/135:40 pm
PHL
-
TRS
1 stop14h 15m
Lufthansa
Mon 8/242:50 pm
TRS
-
PHL
1 stop31h 15m
Lufthansa
Deal found 1/26$671
This KAYAK deal was found by Cheapflights users on 1/26. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/153:25 pm
PHL
-
TRS
2 stops24h 50m
Lufthansa
Mon 8/242:50 pm
TRS
-
PHL
1 stop31h 15m
Lufthansa
Deal found 1/26$675
This KAYAK deal was found by Cheapflights users on 1/26. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/95:40 pm
PHL
-
TRS
1 stop22h 35m
Lufthansa
Fri 8/286:00 am
TRS
-
PHL
1 stop16h 05m
Lufthansa
Deal found 1/26$684
This KAYAK deal was found by Cheapflights users on 1/26. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/145:40 pm
PHL
-
TRS
1 stop14h 15m
Lufthansa
Fri 8/286:00 am
TRS
-
PHL
1 stop16h 05m
Lufthansa
Deal found 1/26$686
This KAYAK deal was found by Cheapflights users on 1/26. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/95:40 pm
PHL
-
TRS
1 stop22h 35m
Lufthansa
Mon 8/242:50 pm
TRS
-
PHL
1 stop31h 15m
Lufthansa
Deal found 1/26$704
This KAYAK deal was found by Cheapflights users on 1/26. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/105:40 pm
PHL
-
TRS
1 stop14h 15m
Lufthansa
Sat 8/292:45 pm
TRS
-
PHL
1 stop31h 20m
Lufthansa
Deal found 1/26$706
This KAYAK deal was found by Cheapflights users on 1/26. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/135:40 pm
PHL
-
TRS
1 stop14h 15m
Lufthansa
Sun 8/236:00 am
TRS
-
PHL
1 stop16h 05m
Lufthansa
Deal found 1/26$736

Find 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 January 28, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$623
(Gotogate)
Provider with most accurate pricing for Philadelphia-Trieste Ronchi dei Legionari flight deals.
Search Deals
Provider most trusted by Cheapflights users for Philadelphia-Trieste Ronchi dei Legionari flights.
Search Deals
From Philadelphia to Trieste Ronchi dei Legionari
Search Deals

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 January 28, 2026.
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

Thu 3/12

6:40 pm-2:05 pm

1 stop14h 25m

Trieste Ronchi dei Legionari

Thu 3/19

6:15 am-5:05 pm

1 stop15h 50m

$651

PhiladelphiaTrieste

PHL - TRS

PHLTRS

Philadelphia

Mon 7/6

5:40 pm-1:55 pm

1 stop14h 15m

Trieste Ronchi dei Legionari

Fri 7/24

6:00 am-4:05 pm

1 stop16h 05m

$1,391

PhiladelphiaTrieste

PHL - TRS

PHLTRS

Philadelphia

Fri 3/13

3:30 pm-10:45 pm

3 stops26h 15m

Trieste Ronchi dei Legionari

Fri 3/20

6:35 am-4:48 pm

3 stops39h 13m

$1,402

PhiladelphiaTrieste

PHL - TRS

PHLTRS

Philadelphia

Tue 7/7

5:40 pm-1:45 pm

1 stop14h 05m

Trieste Ronchi dei Legionari

Tue 7/21

2:45 pm-4:05 pm

1 stop31h 20m

$1,411

PhiladelphiaTrieste

PHL - TRS

PHLTRS

Philadelphia

Thu 3/12

6:40 pm-7:05 pm

2 stops19h 25m

Trieste Ronchi dei Legionari

Thu 3/19

11:15 am-4:48 pm

3 stops34h 33m

$1,412

PhiladelphiaTrieste

PHL - TRS

PHLTRS

Philadelphia

Sun 7/5

5:40 pm-1:45 pm

1 stop14h 05m

Trieste Ronchi dei Legionari

Fri 7/24

6:00 am-4:05 pm

1 stop16h 05m

$1,456

PhiladelphiaTrieste

PHL - TRS

PHLTRS

Philadelphia

Fri 7/10

5:40 pm-1:55 pm

1 stop14h 15m

Trieste Ronchi dei Legionari

Thu 7/23

6:00 am-4:05 pm

1 stop16h 05m

$1,461

PhiladelphiaTrieste

PHL - TRS

PHLTRS

Philadelphia

Wed 7/8

5:40 pm-2:00 pm

1 stop14h 20m

Trieste Ronchi dei Legionari

Sun 7/19

6:00 am-4:05 pm

1 stop16h 05m

$1,461

PhiladelphiaTrieste

PHL - TRS

PHLTRS

Philadelphia

Thu 7/9

5:40 pm-1:55 pm

1 stop14h 15m

Trieste Ronchi dei Legionari

Wed 7/22

6:10 am-4:05 pm

1 stop15h 55m

$1,461

PhiladelphiaTrieste

PHL - TRS

PHLTRS

Philadelphia

Mon 7/6

5:40 pm-1:55 pm

1 stop14h 15m

Trieste Ronchi dei Legionari

Sat 7/18

6:00 am-9:34 pm

2 stops21h 34m

$1,464

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/25

Showing 1-10 of 11 results
1
2

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 January.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*3 stars
AranGrantPrice 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 FlightHub the most. FlightHub 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 $646). 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 14h 25m. Lufthansa provides one of the quickest options available for as low as $651. 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 $646). 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.

See more FAQs

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