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Trieste

$453+ 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 5/25. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — TRS
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
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 January 29, 2026.

This oojo deal was found by Cheapflights users on 1/28. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/187:40 pm
IAD
-
TRS
2 stops16h 50m
Multiple Airlines
Wed 12/26:35 am
TRS
-
IAD
2 stops17h 55m
Multiple Airlines
Deal found 1/28$743
This FlightHub deal was found by Cheapflights users on 1/28. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/186:00 pm
IAD
-
TRS
1 stop14h 05m
Lufthansa
Wed 12/22:45 pm
TRS
-
IAD
1 stop31h 05m
Lufthansa
Deal found 1/28$861
This Booking.com deal was found by Cheapflights users on 1/27. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/132:30 pm
IAD
-
TRS
2 stops27h 15m
Multiple Airlines
Fri 3/2011:15 am
TRS
-
IAD
3 stops30h 30m
Multiple Airlines
Deal found 1/27$873
This Icelandair 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/48:30 pm
IAD
-
TRS
2 stops16h 00m
Icelandair
Wed 4/811:15 am
TRS
-
IAD
2 stops38h 05m
Icelandair
Deal found 1/26$911
This TAP AIR PORTUGAL deal was found by Cheapflights users on 1/28. 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 TAP AIR PORTUGAL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/410:35 pm
IAD
-
TRS
2 stops18h 20m
TAP AIR PORTUGAL
Wed 4/86:35 am
TRS
-
IAD
2 stops38h 30m
TAP AIR PORTUGAL
Deal found 1/28$961
This oojo deal was found by Cheapflights users on 1/28. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/1511:20 pm
IAD
-
TRS
2 stops37h 10m
Multiple Airlines
Sun 5/2411:15 am
TRS
-
IAD
2 stops17h 00m
Multiple Airlines
Deal found 1/28$971
This Mytrip deal was found by Cheapflights users on 1/27. 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.
Mon 2/27:40 pm
IAD
-
TRS
3 stops19h 30m
Multiple Airlines
Fri 2/61:05 pm
TRS
-
IAD
3 stops35h 25m
Multiple Airlines
Deal found 1/27$1,065
This oojo deal was found by Cheapflights users on 1/28. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/154:30 pm
IAD
-
TRS
1 stop11h 55m
ITA Airways
Sun 5/246:35 am
TRS
-
IAD
1 stop13h 55m
ITA Airways
Deal found 1/28$1,073
This Lufthansa deal was found by Cheapflights users on 1/28. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/236:00 pm
IAD
-
TRS
1 stop14h 05m
Lufthansa
Tue 1/52:45 pm
TRS
-
IAD
1 stop31h 05m
Lufthansa
Deal found 1/28$1,077
This Mytrip deal was found by Cheapflights users on 1/28. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/228:20 pm
IAD
-
TRS
2 stops18h 30m
Multiple Airlines
Thu 5/2811:15 am
TRS
-
IAD
3 stops34h 40m
Multiple Airlines
Deal found 1/28$1,090

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 January 29, 2026.

Most accurate provider

AranGrant
2 stars

Most trusted provider

AranGrant
2 stars

Round-trip from

$873
(Booking.com)

One-way from

$453
(Kiwi.com)

Popular in

February

Cheapest in

April

Average price

$1,983
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.
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
Highest demand for flights based on searches. 34% potential increase in price ($612 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 16% potential price decrease ($164 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
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 January 29, 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

Dulles Intl

Fly to

Trieste

Route

Depart

Return

Price

Washington, D.C.Trieste

IAD - TRS

IADTRS

Washington, D.C. Dulles Intl

Thu 5/14

8:30 pm-6:30 pm

2 stops16h 00m

Trieste Ronchi dei Legionari

Mon 5/25

6:35 am-7:20 pm

2 stops42h 45m

$873

Washington, D.C.Trieste

IAD - TRS

IADTRS

Washington, D.C. Dulles Intl

Sat 4/4

10:35 pm-10:55 pm

2 stops18h 20m

Trieste Ronchi dei Legionari

Wed 4/8

6:35 am-3:05 pm

2 stops38h 30m

$961

Washington, D.C.Trieste

IAD - TRS

IADTRS

Washington, D.C. Dulles Intl

Fri 3/13

2:30 pm-10:55 pm

3 stops27h 25m

Trieste Ronchi dei Legionari

Fri 3/20

11:15 am-12:45 pm

3 stops30h 30m

$1,014

Washington, D.C.Trieste

IAD - TRS

IADTRS

Washington, D.C. Dulles Intl

Fri 5/15

4:30 pm-10:25 am

1 stop11h 55m

Trieste Ronchi dei Legionari

Sun 5/24

6:35 am-2:30 pm

1 stop13h 55m

$1,073

Washington, D.C.Trieste

IAD - TRS

IADTRS

Washington, D.C. Dulles Intl

Fri 5/22

8:20 pm-8:50 pm

2 stops18h 30m

Trieste Ronchi dei Legionari

Thu 5/28

11:15 am-3:55 pm

3 stops34h 40m

$1,090

Washington, D.C.Trieste

IAD - TRS

IADTRS

Washington, D.C. Dulles Intl

Fri 3/13

7:00 pm-2:05 pm

1 stop14h 05m

Trieste Ronchi dei Legionari

Fri 3/20

6:25 am-4:50 pm

1 stop15h 25m

$1,134

Washington, D.C.Trieste

IAD - TRS

IADTRS

Washington, D.C. Dulles Intl

Thu 5/14

10:20 pm-10:15 pm

2 stops17h 55m

Trieste Ronchi dei Legionari

Mon 5/25

6:00 am-4:05 pm

1 stop16h 05m

$1,189

Washington, D.C.Trieste

IAD - TRS

IADTRS

Washington, D.C. Dulles Intl

Mon 5/25

5:15 pm-11:20 pm

3 stops24h 05m

$453

Washington, D.C.Trieste

IAD - TRS

IADTRS

Washington, D.C. Dulles Intl

Fri 6/5

4:30 pm-6:30 pm

1 stop20h 00m

$906

Washington, D.C.Trieste

IAD - TRS

IADTRS

Washington, D.C. Dulles Intl

Mon 5/25

5:55 pm-1:55 pm

1 stop14h 00m

$957

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/28

Showing 1-10 of 12 results
1
2
  • Most accurate provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-Trieste flights, users find the pricing of AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Washington, D.C. Dulles Intl Airport-Trieste flight deals on Cheapflights vs. AranGrant 90-95% 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 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 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.

Cheapflights Insights

Everything you need to know about your flight from Washington, D.C. Dulles Intl Airport to Trieste

What is the cheapest month to book a flight from Washington, D.C. Dulles Intl Airport to Trieste?

Currently, June is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Trieste (average of $446). Flying from Washington, D.C. Dulles Intl Airport to Trieste in December is currently the most expensive (average of $792). 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.

Reviews of airlines servicing Trieste

Get insights into the airlines that provide service to Trieste. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Trieste. Reviews last updated January 29, 2026.
Peruse reviews from past customers who have flown with ITA Airways from Washington, D.C. Dulles Intl Airport to Trieste to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
ITA Airways
6.7
Okay
1,137 reviews

Food

6.0

Boarding

6.9

Comfort

6.6

Overall

6.7

Crew

7.4

Entertainment

6.2

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

FRA - FCO

It was a bit confusing where to check in Lufthansa. On the website it says Terminal 2. When we arrived at Frankfurt airport the arrow sign was pointing to 2 different directions. Turns out check in was in Terminal 1. Some Lufthansa ground crew at the counter were testy and rude. Doesn't give the customer an opportunity to talk. I would like to commend the female ground crew with long hair at the special services counter though. She was respectful, very pleasant and helpful. Unfortunately I didn’t get her name.
ITA Airways
6.7
Okay
1,137 reviews
ITA Airways
6.7
Okay
1,137 reviews

Food

6.0

Boarding

6.9

Comfort

6.6

Overall

6.7

Crew

7.4

Entertainment

6.2

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

FRA - FCO

It was a bit confusing where to check in Lufthansa. On the website it says Terminal 2. When we arrived at Frankfurt airport the arrow sign was pointing to 2 different directions. Turns out check in was in Terminal 1. Some Lufthansa ground crew at the counter were testy and rude. Doesn't give the customer an opportunity to talk. I would like to commend the female ground crew with long hair at the special services counter though. She was respectful, very pleasant and helpful. Unfortunately I didn’t get her name.

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 1 airline has 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 TAP AIR PORTUGAL or ITA Airways 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.

  • What is the cheapest airline to fly from Washington, D.C. Dulles Intl Airport to Trieste round-trip?

    According to our current data, ITA Airways ($664), offers the cheapest pricing from Washington, D.C. Dulles Intl Airport to Trieste.

  • 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.

  • What is the cheapest month to book a flight from Washington, D.C. Dulles Intl Airport to Trieste?

    Currently, June is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Trieste (average of $446). Flying from Washington, D.C. Dulles Intl Airport to Trieste in December is currently the most expensive (average of $792). 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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Alternative routes for Dulles Intl to Trieste

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Top airline flying from Dulles Intl to Trieste

Discover the top airline that operate flights from Dulles Intl to Trieste. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
ITA AirwaysCheapest$664Average$914FlexibilityNo cancel feeOn-time81%

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