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Cheap flights from Washington, D.C. Dulles Intl Airport to Trieste from $661

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. Dulles Intl Airport to Trieste departing on 3/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Washington, D.C. Dulles Intl Airport to Trieste

Cheap round-trip flights

Enter your travel dates to find the best prices.
ITA Airways Logo
5:45 pm - 9:10 pm
IAD
-
TRS
22h 25m
2 stops
ITA Airways Logo
6:35 am - 2:30 pm
TRS
-
IAD
13h 55m
1 stop
$661ITA Airways
Sun, Mar 15 - Fri, Apr 10
ITA Airways Logo
5:45 pm - 9:10 pm
IAD
-
TRS
22h 25m
2 stops
ITA Airways Logo
6:35 am - 2:30 pm
TRS
-
IAD
13h 55m
1 stop
$706ITA Airways
Sun, Mar 22 - Sun, Mar 29
ITA Airways Logo
5:45 pm - 10:25 am
IAD
-
TRS
11h 40m
1 stop
ITA Airways Logo
6:35 am - 2:30 pm
TRS
-
IAD
13h 55m
1 stop
$726ITA Airways
Sun, Mar 15 - Fri, Apr 10
ITA Airways Logo
5:45 pm - 6:30 pm
IAD
-
TRS
19h 45m
1 stop
ITA Airways Logo
6:35 am - 2:30 pm
TRS
-
IAD
13h 55m
1 stop
$742ITA Airways
Sun, Mar 22 - Sun, Mar 29
ITA Airways Logo
5:45 pm - 9:10 pm
IAD
-
TRS
22h 25m
2 stops
ITA Airways Logo
3:15 pm - 9:16 pm
TRS
-
IAD
36h 01m
2 stops
$745ITA Airways
Sun, Mar 22 - Sun, Mar 29
Multiple Airlines Logo
7:00 pm - 10:25 am
IAD
-
TRS
34h 25m
3 stops
Multiple Airlines Logo
6:05 am - 4:45 pm
TRS
-
IAD
16h 40m
2 stops
$808Multiple Airlines
Sun, Mar 22 - Sun, Mar 29
Icelandair Logo
8:30 pm - 6:30 pm
IAD
-
TRS
16h 00m
2 stops
Icelandair Logo
11:15 am - 7:20 pm
TRS
-
IAD
38h 05m
2 stops
$939Icelandair
Sat, Apr 4 - Wed, Apr 8
TAP AIR PORTUGAL Logo
10:35 pm - 10:55 pm
IAD
-
TRS
18h 20m
2 stops
TAP AIR PORTUGAL Logo
6:35 am - 3:05 pm
TRS
-
IAD
38h 30m
2 stops
$961TAP AIR PORTUGAL
Sat, Apr 4 - Wed, Apr 8
TAP AIR PORTUGAL Logo
10:35 pm - 10:55 pm
IAD
-
TRS
18h 20m
2 stops
TAP AIR PORTUGAL Logo
6:35 am - 3:05 pm
TRS
-
IAD
38h 30m
2 stops
$962TAP AIR PORTUGAL
Sat, Apr 4 - Wed, Apr 8
ITA Airways Logo
5:45 pm - 9:10 pm
IAD
-
TRS
22h 25m
2 stops
ITA Airways Logo
6:35 am - 9:16 pm
TRS
-
IAD
20h 41m
2 stops
$967ITA Airways
Sun, Mar 15 - Fri, Apr 10

Icelandair flights from Washington, D.C. Dulles Intl Airport to Trieste

Our best Icelandair deals on Washington, D.C. Dulles Intl Airport to Trieste flight tickets
Icelandair
Apr 4
IAD8:30 pmWashington, D.C. Dulles Intl
16h 00m
2 stops
TRS6:30 pmTrieste Ronchi dei Legionari
Apr 8
TRS11:15 amTrieste Ronchi dei Legionari
38h 05m
2 stops
IAD7:20 pmWashington, D.C. Dulles Intl
$939
Icelandair
Jul 3
IAD8:30 pmWashington, D.C. Dulles Intl
40h 00m
2 stops
TRS6:30 pmTrieste Ronchi dei Legionari
Jul 17
TRS11:15 amTrieste Ronchi dei Legionari
17h 00m
2 stops
IAD10:15 pmWashington, D.C. Dulles Intl
$1,340

ITA Airways flights from Washington, D.C. Dulles Intl Airport to Trieste

Our best ITA Airways deals on Washington, D.C. Dulles Intl Airport to Trieste flight tickets
ITA Airways
Mar 15
IAD5:45 pmWashington, D.C. Dulles Intl
22h 25m
2 stops
TRS9:10 pmTrieste Ronchi dei Legionari
Apr 10
TRS6:35 amTrieste Ronchi dei Legionari
13h 55m
1 stop
IAD2:30 pmWashington, D.C. Dulles Intl
$661
ITA Airways
Mar 22
IAD5:45 pmWashington, D.C. Dulles Intl
22h 25m
2 stops
TRS9:10 pmTrieste Ronchi dei Legionari
Mar 29
TRS6:35 amTrieste Ronchi dei Legionari
13h 55m
1 stop
IAD2:30 pmWashington, D.C. Dulles Intl
$706
ITA Airways
Mar 15
IAD5:45 pmWashington, D.C. Dulles Intl
11h 40m
1 stop
TRS10:25 amTrieste Ronchi dei Legionari
Apr 10
TRS6:35 amTrieste Ronchi dei Legionari
13h 55m
1 stop
IAD2:30 pmWashington, D.C. Dulles Intl
$726

momondo Fare Finder

 
Customize your flight search to find flights from Washington, D.C. Dulles Intl Airport 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, momondo users made 832,500 searches. Data last updated February 5, 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

Washington, D.C.Trieste

IAD - TRS

IADTRS

Washington, D.C. Dulles Intl

Sun 3/15

5:45 pm-9:10 pm

2 stops22h 25m

Trieste Ronchi dei Legionari

Fri 4/10

6:35 am-2:30 pm

1 stop13h 55m

$661

Washington, D.C.Trieste

IAD - TRS

IADTRS

Washington, D.C. Dulles Intl

Sun 3/22

5:45 pm-9:10 pm

2 stops22h 25m

Trieste Ronchi dei Legionari

Sun 3/29

6:35 am-2:30 pm

1 stop13h 55m

$706

Washington, D.C.Trieste

IAD - TRS

IADTRS

Washington, D.C. Dulles Intl

Sun 3/15

5:45 pm-10:25 am

1 stop11h 40m

Trieste Ronchi dei Legionari

Fri 4/10

6:35 am-2:30 pm

1 stop13h 55m

$726

Washington, D.C.Trieste

IAD - TRS

IADTRS

Washington, D.C. Dulles Intl

Sun 3/22

5:45 pm-6:30 pm

1 stop19h 45m

Trieste Ronchi dei Legionari

Sun 3/29

6:35 am-2:30 pm

1 stop13h 55m

$742

Washington, D.C.Trieste

IAD - TRS

IADTRS

Washington, D.C. Dulles Intl

Sun 3/22

5:45 pm-9:10 pm

2 stops22h 25m

Trieste Ronchi dei Legionari

Sun 3/29

3:15 pm-9:16 pm

2 stops36h 01m

$745

Washington, D.C.Trieste

IAD - TRS

IADTRS

Washington, D.C. Dulles Intl

Sun 3/22

7:00 pm-10:25 am

3 stops34h 25m

Trieste Ronchi dei Legionari

Sun 3/29

6:05 am-4:45 pm

2 stops16h 40m

$808

Washington, D.C.Trieste

IAD - TRS

IADTRS

Washington, D.C. Dulles Intl

Sat 4/4

8:30 pm-6:30 pm

2 stops16h 00m

Trieste Ronchi dei Legionari

Wed 4/8

11:15 am-7:20 pm

2 stops38h 05m

$939

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

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

$962

Washington, D.C.Trieste

IAD - TRS

IADTRS

Washington, D.C. Dulles Intl

Sun 3/15

5:45 pm-9:10 pm

2 stops22h 25m

Trieste Ronchi dei Legionari

Fri 4/10

6:35 am-9:16 pm

2 stops20h 41m

$967

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 14 resultsSorted by cheapest first
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See travel insights to Trieste from

How to get the cheapest flight ticket from Washington, D.C. Dulles Intl Airport to Trieste

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest airline that flies from Washington, D.C. Dulles Intl to Trieste Ronchi dei Legionari?

United Airlines, TAP AIR PORTUGAL, and Emirates are the most popular carriers operating from Washington, D.C. Dulles Intl to Trieste Ronchi dei Legionari

What airlines fly to Trieste?

United Airlines, Turkish Airlines and ITA Airways are the top three most popular airlines that fly to Trieste from Washington, D.C. Dulles Intl Airport according to our data. United Airlines is the first choice among our users, with 52% of people opting to fly with this airline when traveling to Trieste. Keep in mind that there are 10 different airlines that fly to Trieste on a routine basis, so you have a few additional options to choose from.

When to book flights from Washington, D.C. Dulles Intl Airport to Trieste

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. Dulles Intl Airport to Trieste according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Washington, D.C. Dulles Intl Airport to Trieste (IAD to TRS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. Dulles Intl Airport to Trieste

Fastest flight time

16h 00m

Direct flights

None
The fastest flight from Washington, D.C. Dulles Intl Airport to Trieste takes 16h 00m
There are no direct flights from Washington, D.C. Dulles Intl Airport to Trieste. There are no popular flight routes from Washington, D.C. Dulles Intl Airport to Trieste.
Search flight deals

  • How far is Washington, D.C. Dulles Intl to Trieste Ronchi dei Legionari by plane?

    A flight from Washington, D.C. Dulles Intl to Trieste Ronchi dei Legionari will travel around 4420.8 mi. By plane, this route typically takes 16h 00m.

  • When did momondo last update prices for flights from Washington, D.C. Dulles Intl Airport to Trieste Ronchi dei Legionari Airport?

    Prices for flights from Washington, D.C. Dulles Intl Airport to Trieste Ronchi dei Legionari Airport are updated daily.

  • How many operators does momondo search for flights from Washington, D.C. Dulles Intl Airport to Trieste Ronchi dei Legionari Airport?

  • How old do you have to be to fly from Washington, D.C. Dulles Intl Airport to Trieste Ronchi dei Legionari Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Washington, D.C. Dulles Intl Airport to Trieste Ronchi dei Legionari Airport.

  • What documentation or ID do you need to fly to Trieste Ronchi dei Legionari Airport?

    The required travel and health documents for your Trieste Ronchi dei Legionari Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Trieste Ronchi dei Legionari Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular airline from Washington, D.C. Dulles Intl Airport to Trieste?

Best airlines flying from Washington, D.C. Dulles Intl Airport to Trieste

Compare and see reviews for airlines that fly from Washington, D.C. Dulles Intl Airport to Trieste with momondo
Airline
Rating
Free Cancellation
Price
ITA AirwaysPriceFrom $664Free CancellationRating
6.7
1,145 reviews
Search ITA Airways flights

Traveling to a place near Trieste?

Book flights to Trieste if you plan to visit one of these locations
Udine
Grado

Why use momondo?

Why should I use momondo to find a flight deal from Washington, D.C. to Trieste?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Washington, D.C. to Trieste for you.

Can I find flights from Washington, D.C. to Trieste with flexible booking policies on momondo?

All flight searches from Washington, D.C. to Trieste on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Washington, D.C. to Trieste?

Once you have performed a search for Washington, D.C. to Trieste flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Washington, D.C. to Trieste right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Washington, D.C. to Trieste flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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Fly your favorite airline to Trieste

Airlines are sorted and displayed according to clicks in the past 7 days on momondo
United Airlines
Turkish Airlines
ITA Airways
Lufthansa
British Airways
TAP AIR PORTUGAL
Aer Lingus
Delta
Scandinavian Airlines
SWISS