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Trieste

$404+ Cheap flights from Dulles Intl (IAD) 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 9/20. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — TRS
Jul 18 — Jul 251
Sat 7/18
Sat 7/25
1 adult, Economy
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Cheap flight deals from Dulles Intl to Trieste

Cheapest flights from Dulles Intl to Trieste
Explore the most affordable flight options available from Dulles Intl to Trieste. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 18, 2026.

This oojo deal was found by Cheapflights users on 6/17. 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.
Sat 8/84:30 pm
IAD
-
TRS
1 stop11h 55m
ITA Airways
Thu 8/2011:15 am
TRS
-
IAD
1 stop33h 15m
ITA Airways
Deal found 6/17$782
This oojo deal was found by Cheapflights users on 6/15. 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.
Fri 7/104:30 pm
IAD
-
TRS
1 stop20h 00m
ITA Airways
Wed 8/1911:15 am
TRS
-
IAD
1 stop33h 15m
ITA Airways
Deal found 6/15$860
This Orbitz deal was found by Cheapflights users on 6/17. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/810:14 pm
IAD
-
TRS
2 stops33h 31m
Multiple Airlines
Wed 8/196:10 am
TRS
-
IAD
1 stop15h 55m
Multiple Airlines
Deal found 6/17$888
This Justfly.com deal was found by Cheapflights users on 6/17. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/85:25 pm
IAD
-
TRS
2 stops38h 20m
Lufthansa
Wed 8/196:10 am
TRS
-
IAD
1 stop13h 25m
Lufthansa
Deal found 6/17$890
This oojo deal was found by Cheapflights users on 6/14. 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 9/224:30 pm
IAD
-
TRS
1 stop11h 55m
ITA Airways
Tue 9/296:35 am
TRS
-
IAD
1 stop13h 55m
ITA Airways
Deal found 6/14$892
This Orbitz deal was found by Cheapflights users on 6/17. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/810:14 pm
IAD
-
TRS
2 stops33h 31m
Multiple Airlines
Thu 8/206:15 am
TRS
-
IAD
2 stops20h 09m
Multiple Airlines
Deal found 6/17$896
This ITA Airways deal was found by Cheapflights users on 6/18. 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 ITA Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/124:30 pm
IAD
-
TRS
1 stop16h 00m
ITA Airways
Thu 9/176:35 am
TRS
-
IAD
1 stop13h 55m
ITA Airways
Deal found 6/18$931
This oojo deal was found by Cheapflights users on 6/15. 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.
Sat 9/264:30 pm
IAD
-
TRS
1 stop11h 55m
ITA Airways
Tue 10/66:35 am
TRS
-
IAD
1 stop13h 55m
ITA Airways
Deal found 6/15$936
This FlightHub deal was found by Cheapflights users on 6/16. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/204:30 pm
IAD
-
TRS
1 stop20h 00m
ITA Airways
Mon 11/211:15 am
TRS
-
IAD
1 stop33h 25m
ITA Airways
Deal found 6/16$940
This Mytrip deal was found by Cheapflights users on 6/14. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/228:30 pm
IAD
-
TRS
2 stops17h 45m
Multiple Airlines
Tue 9/291:30 pm
TRS
-
IAD
2 stops31h 40m
Multiple Airlines
Deal found 6/14$974
This ITA Airways deal was found by Cheapflights users on 6/18. 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 ITA Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/94:30 pm
IAD
-
TRS
1 stop11h 55m
ITA Airways
Sun 8/96:35 am
TRS
-
IAD
1 stop13h 55m
ITA Airways
Deal found 6/18$977

Find flight deals from Dulles Intl to Trieste

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) 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 June 18, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$782
(Gotogate)

One-way from

$404
(Kiwi.com)
Provider with most accurate pricing for Washington, D.C. Dulles Intl-Trieste Ronchi dei Legionari flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. Dulles Intl-Trieste Ronchi dei Legionari flights.
Search Deals
From Washington, D.C. Dulles Intl to Trieste Ronchi dei Legionari
Search Deals
One-way flight from Washington, D.C. Dulles Intl to Trieste Ronchi dei Legionari
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Dulles Intl 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 June 18, 2026.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Trieste that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.Trieste

IAD - TRS

IADTRS

Washington, D.C. Dulles Intl

Fri 7/10

4:30 pm-6:30 pm

1 stop20h 00m

Trieste Ronchi dei Legionari

Wed 8/19

11:15 am-2:30 pm

1 stop33h 15m

$860
Quickest round-trip

Washington, D.C.Trieste

IAD - TRS

IADTRS

Washington, D.C. Dulles Intl

Tue 9/22

4:30 pm-10:25 am

1 stop11h 55m

Trieste Ronchi dei Legionari

Tue 9/29

6:35 am-2:30 pm

1 stop13h 55m

$892

Washington, D.C.Trieste

IAD - TRS

IADTRS

Washington, D.C. Dulles Intl

Sat 8/8

5:25 pm-1:45 pm

2 stops38h 20m

Trieste Ronchi dei Legionari

Wed 8/19

6:10 am-9:08 pm

2 stops20h 58m

$905

Washington, D.C.Trieste

IAD - TRS

IADTRS

Washington, D.C. Dulles Intl

Sat 8/8

10:15 pm-10:15 pm

1 stop18h 00m

Trieste Ronchi dei Legionari

Wed 8/19

6:10 am-8:00 pm

1 stop19h 50m

$999

Washington, D.C.Trieste

IAD - TRS

IADTRS

Washington, D.C. Dulles Intl

Wed 10/21

3:25 pm-2:00 pm

1 stop16h 35m

Trieste Ronchi dei Legionari

Sun 11/1

2:45 pm-3:55 pm

1 stop31h 10m

$1,054

Washington, D.C.Trieste

IAD - TRS

IADTRS

Washington, D.C. Dulles Intl

Thu 7/30

3:25 pm-1:55 pm

1 stop16h 30m

Trieste Ronchi dei Legionari

Thu 8/6

6:15 am-1:35 pm

1 stop13h 20m

$1,078

Washington, D.C.Trieste

IAD - TRS

IADTRS

Washington, D.C. Dulles Intl

Tue 9/22

8:30 pm-10:55 pm

3 stops20h 25m

Trieste Ronchi dei Legionari

Tue 9/29

3:15 pm-3:10 pm

3 stops29h 55m

$1,130

Washington, D.C.Trieste

IAD - TRS

IADTRS

Washington, D.C. Dulles Intl

Sat 9/12

10:35 pm-10:55 pm

2 stops18h 20m

Trieste Ronchi dei Legionari

Thu 9/17

3:15 pm-2:25 pm

2 stops29h 10m

$1,218

Washington, D.C.Trieste

IAD - TRS

IADTRS

Washington, D.C. Dulles Intl

Thu 7/30

8:30 pm-10:15 pm

3 stops19h 45m

Trieste Ronchi dei Legionari

Thu 8/6

10:30 am-3:10 pm

2 stops34h 40m

$1,256

Washington, D.C.Trieste

IAD - TRS

IADTRS

Washington, D.C. Dulles Intl

Sat 8/8

9:45 am-10:55 pm

3 stops31h 10m

Trieste Ronchi dei Legionari

Thu 8/20

6:35 am-8:35 pm

3 stops20h 00m

$1,325

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/13

Showing 1-10 of 21 resultsSorted by cheapest first
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  • Most accurate provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-Trieste flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Washington, D.C. Dulles Intl Airport-Trieste flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Washington, D.C. Dulles Intl Airport-Trieste flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-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 Washington, D.C. Dulles Intl Airport-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 Dulles Intl to Trieste

Have a flexible travel schedule? Discover the best time to fly to Trieste from Dulles Intl 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 Dulles Intl to Trieste. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Trieste from Washington, D.C. Dulles Intl?

    Trieste Ronchi dei Legionari (TRS) is the airport you will fly into if you book a flight from Washington, D.C. Dulles Intl to Trieste. You should not have trouble finding flights to Ronchi dei Legionari from Washington, D.C. Dulles Intl; the airport handles an average of 0 inbound flights from Washington, D.C. Dulles Intl per day. You should also have plenty of airline options to choose from since 0 airlines have flights to the Trieste airport from Washington, D.C. Dulles Intl. It is only a 18.2 mi journey from Ronchi dei Legionari (TRS) to Trieste’s city center.

  • How long is the flight from Washington, D.C. Dulles Intl Airport to Trieste?

    There are many flights that can get you from Washington, D.C. Dulles Intl Airport to Trieste in 11h 55m. Fly via ITA Airways or Lufthansa to get the fastest option. The distance between Washington, D.C. Dulles Intl Airport and Trieste is about 4403 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

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

  • How can I find direct flights from Dulles Intl to Trieste?

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

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

    Yes. Cheapflights offers flight deals from Dulles Intl 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.

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