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 23h 30m. Fly via ITA Airways or TAP AIR PORTUGAL 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.

In terms of precipitation, rainfall in Trieste ranges from 2.4 - 4.5 inches per month. November is typically the wettest month, when rainfall can reach 4.5 in. February is typically the driest time to visit Trieste when rainfall is around 2.4 in.

If weather is an important factor for your trip to Trieste, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 75.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 41.0 F).

What is the cheapest time of day to fly from IAD to TRS?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Washington, D.C. Dulles Intl Airport to Trieste as you normally would.

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.

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.

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.

$430+ Cheap Flights from Washington, D.C. Dulles Intl Airport to Trieste

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Cheap flight deals from Dulles Intl to Trieste

Cheapest

Best

Last-minute

One-way

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 October 30, 2026.

Sun 11/84:30 pm -

1 stop11h 55m

Sat 11/147:15 pm -

1 stop25h 15m

Deal found 10/29

$911

Sun 12/274:30 pm -

1 stop24h 25m

Tue 1/56:35 am -

1 stop13h 55m

Deal found 10/25

$1,173

Sun 12/271:30 pm -

2 stops27h 25m

Tue 1/56:35 am -

2 stops35h 10m

Deal found 10/25

$1,183

Sat 11/145:25 pm -

2 stops23h 30m

Wed 11/183:15 pm -

2 stops30h 00m

Deal found 10/26

$1,185

Sun 11/810:30 pm -

2 stops14h 25m

Sat 11/143:15 pm -

1 stop29h 15m

Deal found 10/29

$1,187

Sun 12/278:10 pm -

2 stops40h 20m

Tue 1/511:15 am -

2 stops35h 45m

Deal found 10/25

$1,522

Best flights from Dulles Intl to Trieste
Discover carefully curated flight deals from Dulles Intl to Trieste that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 30, 2026.

Sun 12/274:30 pm -

1 stop24h 25m

Tue 1/56:35 am -

1 stop13h 55m

Deal found 10/25

$1,173

Sat 11/145:25 pm -

2 stops23h 30m

Wed 11/183:15 pm -

2 stops30h 00m

Deal found 10/26

$1,185

Sun 12/274:30 pm -

1 stop11h 55m

Tue 1/510:15 am -

2 stops33h 55m

Deal found 10/25

$1,351

Sat 12/125:16 pm -

2 stops35h 09m

Sat 12/196:35 am -

1 stop14h 50m

Deal found 10/27

$1,774

Sat 11/145:25 pm -

2 stops23h 30m

Wed 11/256:35 am -

2 stops38h 40m

Deal found 10/28

$2,503

Sat 11/145:50 pm -

2 stops34h 35m

Wed 11/186:35 am -

1 stop14h 30m

Deal found 10/29

$2,534

Last-minute flights from Dulles Intl to Trieste
Discover last-minute flight deals from Dulles Intl to Trieste. Data last updated October 30, 2026 and is based on user searches.

Sun 11/84:30 pm -

1 stop11h 55m

Sat 11/147:15 pm -

1 stop25h 15m

Deal found 10/29

$911

Sun 11/810:30 pm -

2 stops14h 25m

Sat 11/143:15 pm -

1 stop29h 15m

Deal found 10/29

$1,187

Sat 11/145:25 pm -

2 stops23h 30m

Wed 11/183:15 pm -

2 stops30h 00m

Deal found 10/26

$1,185

Sat 11/145:25 pm -

2 stops23h 30m

Wed 11/256:35 am -

2 stops38h 40m

Deal found 10/29

$2,503

Sat 11/145:50 pm -

2 stops34h 35m

Wed 11/186:35 am -

1 stop14h 30m

Deal found 10/28

$2,534

Sat 11/146:00 pm -

1 stop14h 30m

Wed 11/256:35 am -

1 stop14h 30m

Deal found 10/29

$3,380

One-way flights from Dulles Intl to Trieste
Search for one-way flight options from Dulles Intl to Trieste. Find affordable one-way fares based on user searches. Data last updated October 30, 2026.

Sun 12/137:40 pm -

3 stops32h 10m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 10/29

$430

Sat 11/145:25 pm -

2 stops39h 05m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 10/28

$1,382

Sat 11/147:40 pm -

2 stops16h 50m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 10/28

$1,684

Sat 11/146:00 pm -

1 stop14h 30m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 10/28

$3,219

Find flight deals from Dulles Intl to Trieste

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$863 (KLM)
One-way from	$430 (Kiwi.com)

Provider with most accurate pricing for Washington, D.C. Dulles Intl-Trieste Ronchi dei Legionari flight deals.

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Provider most trusted by Cheapflights users for Washington, D.C. Dulles Intl-Trieste Ronchi dei Legionari flights.

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From Washington, D.C. Dulles Intl to Trieste Ronchi dei Legionari

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One-way flight from Washington, D.C. Dulles Intl to Trieste Ronchi dei Legionari

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Cheapflights Fare Finder

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 Washington, D.C. Dulles Intl - TRS Trieste Ronchi dei Legionari

IADTRS

Washington, D.C. Dulles Intl

Sun 12/13

7:40 pm-9:50 am

3 stops32h 10m

Trieste Ronchi dei Legionari

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$430

Washington, D.C.Trieste

IAD Washington, D.C. Dulles Intl - TRS Trieste Ronchi dei Legionari

IADTRS

Washington, D.C. Dulles Intl

Sun 12/27

4:30 pm-10:55 pm

1 stop24h 25m

Trieste Ronchi dei Legionari

Tue 1/5

6:35 am-2:30 pm

1 stop13h 55m

$1,173

Washington, D.C.Trieste

IAD Washington, D.C. Dulles Intl - TRS Trieste Ronchi dei Legionari

IADTRS

Washington, D.C. Dulles Intl

Sat 11/14

5:25 pm-10:55 pm

2 stops23h 30m

Trieste Ronchi dei Legionari

Wed 11/18

3:15 pm-3:15 pm

2 stops30h 00m

$1,185

Washington, D.C.Trieste

IAD Washington, D.C. Dulles Intl - TRS Trieste Ronchi dei Legionari

IADTRS

Washington, D.C. Dulles Intl

Sun 12/27

4:30 pm-10:25 am

1 stop11h 55m

Trieste Ronchi dei Legionari

Tue 1/5

10:15 am-2:10 pm

2 stops33h 55m

$1,351

Washington, D.C.Trieste

IAD Washington, D.C. Dulles Intl - TRS Trieste Ronchi dei Legionari

IADTRS

Washington, D.C. Dulles Intl

Sat 11/14

5:25 pm-2:30 pm

2 stops39h 05m

Trieste Ronchi dei Legionari

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$1,382

Washington, D.C.Trieste

IAD Washington, D.C. Dulles Intl - TRS Trieste Ronchi dei Legionari

IADTRS

Washington, D.C. Dulles Intl

Sat 12/12

5:16 pm-10:25 am

2 stops35h 09m

Trieste Ronchi dei Legionari

Sat 12/19

6:35 am-3:25 pm

1 stop14h 50m

$1,774

Washington, D.C.Trieste

IAD Washington, D.C. Dulles Intl - TRS Trieste Ronchi dei Legionari

IADTRS

Washington, D.C. Dulles Intl

Sat 11/14

5:25 pm-10:55 pm

2 stops23h 30m

Trieste Ronchi dei Legionari

Wed 11/25

6:35 am-3:15 pm

2 stops38h 40m

$2,503

Washington, D.C.Trieste

IAD Washington, D.C. Dulles Intl - TRS Trieste Ronchi dei Legionari

IADTRS

Washington, D.C. Dulles Intl

Sat 11/14

5:50 pm-10:25 am

2 stops34h 35m

Trieste Ronchi dei Legionari

Wed 11/18

6:35 am-3:05 pm

1 stop14h 30m

$2,534

Quickest round-trip

Washington, D.C.Trieste

IAD Washington, D.C. Dulles Intl - TRS Trieste Ronchi dei Legionari

IADTRS

Washington, D.C. Dulles Intl

Sat 11/14

6:00 pm-2:30 pm

1 stop14h 30m

Trieste Ronchi dei Legionari

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$6,584

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/29

Sorted by cheapest first

Compare providers for flights from Dulles Intl to Trieste

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Dulles Intl to Trieste in October.

Provider	Price Accuracy	Trust Score*
FlightHub	Price Accuracy3 stars	Trust Score*3 stars
eDreams	Price Accuracy2 stars	Trust Score*3 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 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.

IAD-TRS

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

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 23h 30m. Fly via ITA Airways or TAP AIR PORTUGAL 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.

See more FAQs

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$430+ Cheap flights from Dulles Intl (IAD) 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 12/13. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Dulles Intl to Trieste with Cheapflights

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Cheap flight deals from Dulles Intl to Trieste

Cheapest flights from Dulles Intl to TriesteExplore 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 October 30, 2026.

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 October 30, 2026.

Best flights from Dulles Intl to TriesteDiscover carefully curated flight deals from Dulles Intl to Trieste that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 30, 2026.

Discover carefully curated flight deals from Dulles Intl to Trieste that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 30, 2026.

Last-minute flights from Dulles Intl to TriesteDiscover last-minute flight deals from Dulles Intl to Trieste. Data last updated October 30, 2026 and is based on user searches.

Discover last-minute flight deals from Dulles Intl to Trieste. Data last updated October 30, 2026 and is based on user searches.

One-way flights from Dulles Intl to TriesteSearch for one-way flight options from Dulles Intl to Trieste. Find affordable one-way fares based on user searches. Data last updated October 30, 2026.

Search for one-way flight options from Dulles Intl to Trieste. Find affordable one-way fares based on user searches. Data last updated October 30, 2026.

Find flight deals from Dulles Intl to Trieste

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Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Trieste that are best for you.

Compare providers for flights from Dulles Intl 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 Dulles Intl to Trieste in October.

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.

Related info for your journey

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

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

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

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

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

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Alternative routes for Dulles Intl to Trieste

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Complete your trip

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Search flights from Dulles Intl to Trieste by cabin class

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Dulles Intl and Trieste flights

Browse other Dulles Intl and Trieste flight options. Last updated on October 30, 2026.

Other flights from Dulles Intl

Browse through other flights departing from Dulles Intl. Flights are based on user searches made on Cheapflights and were last updated on October 30, 2026.

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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 October 30, 2026.

Best flights from Dulles Intl to Trieste
Discover carefully curated flight deals from Dulles Intl to Trieste that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 30, 2026.

Last-minute flights from Dulles Intl to Trieste
Discover last-minute flight deals from Dulles Intl to Trieste. Data last updated October 30, 2026 and is based on user searches.

One-way flights from Dulles Intl to Trieste
Search for one-way flight options from Dulles Intl to Trieste. Find affordable one-way fares based on user searches. Data last updated October 30, 2026.