HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Trieste

$726+ Cheap flights from Portland (PDX) to Trieste (TRS)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/15. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — TRS
May 30 — Jun 61
Sat 5/30
Sat 6/6
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Portland to Trieste with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Portland to Trieste

Cheapest flights from Portland to Trieste
Explore the most affordable flight options available from Portland to Trieste. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 30, 2026.

This KAYAK deal was found by Cheapflights users on 4/28. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/2010:10 am
PDX
-
TRS
2 stops18h 45m
Lufthansa
Wed 7/296:10 am
TRS
-
PDX
2 stops22h 01m
Lufthansa
Deal found 4/28$1,134
This KAYAK deal was found by Cheapflights users on 4/28. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/2010:10 am
PDX
-
TRS
2 stops18h 45m
Lufthansa
Thu 7/306:15 am
TRS
-
PDX
2 stops21h 32m
Lufthansa
Deal found 4/28$1,144
This KAYAK deal was found by Cheapflights users on 4/28. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/2211:05 am
PDX
-
TRS
2 stops17h 55m
Lufthansa
Thu 7/306:15 am
TRS
-
PDX
2 stops21h 32m
Lufthansa
Deal found 4/28$1,149
This oojo deal was found by Cheapflights users on 4/26. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/53:30 pm
PDX
-
TRS
2 stops18h 00m
Multiple Airlines
Sat 5/166:35 am
TRS
-
PDX
2 stops44h 25m
Multiple Airlines
Deal found 4/26$1,155
This United Airlines deal was found by Cheapflights users on 4/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/207:00 am
PDX
-
TRS
2 stops18h 25m
United Airlines
Wed 7/296:35 am
TRS
-
PDX
3 stops27h 15m
United Airlines
Deal found 4/28$1,346
This United Airlines deal was found by Cheapflights users on 4/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/207:00 am
PDX
-
TRS
2 stops18h 25m
United Airlines
Thu 7/306:35 am
TRS
-
PDX
3 stops27h 15m
United Airlines
Deal found 4/28$1,481
This United Airlines deal was found by Cheapflights users on 4/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/217:00 am
PDX
-
TRS
2 stops18h 25m
United Airlines
Tue 7/286:35 am
TRS
-
PDX
3 stops27h 15m
United Airlines
Deal found 4/28$1,531
This United Airlines deal was found by Cheapflights users on 4/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/227:00 am
PDX
-
TRS
2 stops18h 25m
United Airlines
Tue 7/286:35 am
TRS
-
PDX
3 stops27h 15m
United Airlines
Deal found 4/28$1,563

Find flight deals from Portland to Trieste

Discover tips and strategies to find the most affordable flight options for your journey from Portland (PDX) 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 April 30, 2026.

Most accurate provider

Ovago
3 stars

Most trusted provider

Ovago
3 stars

Round-trip from

$1,134
(KAYAK)

One-way from

$726
(Kiwi.com)
Provider with most accurate pricing for Portland-Trieste Ronchi dei Legionari flight deals.
Search Deals
Provider most trusted by Cheapflights users for Portland-Trieste Ronchi dei Legionari flights.
Search Deals
From Portland to Trieste Ronchi dei Legionari
Search Deals
One-way flight from Portland to Trieste Ronchi dei Legionari
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Portland 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 April 30, 2026.
Use the filters below to find and compare flights from Portland to Trieste that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

PortlandTrieste

PDX - TRS

PDXTRS

Portland

Mon 7/20

7:00 am-10:25 am

2 stops18h 25m

Trieste Ronchi dei Legionari

Wed 7/29

6:35 am-12:50 am

3 stops27h 15m

$1,346

PortlandTrieste

PDX - TRS

PDXTRS

Portland

Wed 7/22

7:00 am-10:25 am

2 stops18h 25m

Trieste Ronchi dei Legionari

Wed 7/29

6:35 am-12:50 am

3 stops27h 15m

$1,346

PortlandTrieste

PDX - TRS

PDXTRS

Portland

Mon 7/20

7:00 am-10:25 am

2 stops18h 25m

Trieste Ronchi dei Legionari

Thu 7/30

6:35 am-12:50 am

3 stops27h 15m

$1,481

PortlandTrieste

PDX - TRS

PDXTRS

Portland

Tue 7/21

7:00 am-10:25 am

2 stops18h 25m

Trieste Ronchi dei Legionari

Thu 7/30

6:35 am-12:50 am

3 stops27h 15m

$1,531

PortlandTrieste

PDX - TRS

PDXTRS

Portland

Wed 7/22

7:00 am-10:25 am

2 stops18h 25m

Trieste Ronchi dei Legionari

Tue 7/28

6:35 am-12:50 am

3 stops27h 15m

$1,563
Cheapest one-way

PortlandTrieste

PDX - TRS

PDXTRS

Portland

Fri 5/15

7:00 am-9:05 am

3 stops41h 05m

$726
Quickest one-way

PortlandTrieste

PDX - TRS

PDXTRS

Portland

Fri 5/15

7:15 am-1:55 pm

2 stops21h 40m

$807

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/25

Sorted by cheapest first
  • Most accurate provider: When it comes to deals on Portland-Trieste flights, users find the pricing of Ovago to be most consistent on Cheapflights vs. Ovago Users can find the same prices on Portland-Trieste flight deals on Cheapflights vs. Ovago >95% of the time. Price accuracy is based on data collected from Portland-Trieste flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Portland-Trieste flights, Cheapflights users trust Ovago the most. Ovago 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 Portland-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 Portland to Trieste

Have a flexible travel schedule? Discover the best time to fly to Trieste from Portland 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.

Related info for your journey

Find useful and relevant information for your journey from Portland 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 Portland to Trieste?

    United Airlines can get you from Portland to Trieste in just under 18h 25m. Your travel time can differ by up to . The distance from Portland to Trieste is about 5574 mi.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Portland 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Complete your trip

Complete your trip to Trieste by adding a car rental and/or hotel reservation to your travel itinerary.
Trieste car rentals
Venice Marco Polo Airport car rentals
Trieste Ronchi dei Legionari Airport car rentals
Venice Treviso A. Canova Airport car rentals

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.