Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Washington, D.C. Dulles Intl Airport to Trieste from $988

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 5/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

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.
Multiple Airlines Logo
5:05 pm - 10:55 pm
IAD
-
TRS
23h 50m
3 stops
Multiple Airlines Logo
1:30 pm - 3:10 pm
TRS
-
IAD
31h 40m
2 stops
$988Multiple Airlines
Fri, May 8 - Tue, May 12
Multiple Airlines Logo
5:05 pm - 10:55 pm
IAD
-
TRS
23h 50m
3 stops
Multiple Airlines Logo
7:15 pm - 8:35 pm
TRS
-
IAD
31h 20m
3 stops
$1,050Multiple Airlines
Fri, May 8 - Tue, May 12
Multiple Airlines Logo
10:35 pm - 11:35 pm
IAD
-
TRS
19h 00m
2 stops
Multiple Airlines Logo
7:15 pm - 3:10 pm
TRS
-
IAD
25h 55m
3 stops
$1,063Multiple Airlines
Mon, May 11 - Mon, May 18
Multiple Airlines Logo
8:30 pm - 10:25 pm
IAD
-
TRS
19h 55m
3 stops
Multiple Airlines Logo
3:15 pm - 3:10 pm
TRS
-
IAD
29h 55m
3 stops
$1,070Multiple Airlines
Mon, May 11 - Mon, May 18
Multiple Airlines Logo
1:20 pm - 5:00 pm
IAD
-
TRS
21h 40m
2 stops
Multiple Airlines Logo
1:30 pm - 3:10 pm
TRS
-
IAD
31h 40m
2 stops
$1,095Multiple Airlines
Fri, May 8 - Tue, May 12
ITA Airways Logo
4:30 pm - 10:25 am
IAD
-
TRS
11h 55m
1 stop
ITA Airways Logo
6:35 am - 2:30 pm
TRS
-
IAD
13h 55m
1 stop
$1,125ITA Airways
Fri, May 8 - Tue, May 12
Multiple Airlines Logo
10:35 pm - 11:35 pm
IAD
-
TRS
19h 00m
2 stops
Multiple Airlines Logo
3:15 pm - 3:10 pm
TRS
-
IAD
29h 55m
2 stops
$1,127Multiple Airlines
Mon, May 11 - Mon, May 18
Multiple Airlines Logo
10:20 pm - 11:45 pm
IAD
-
TRS
19h 25m
2 stops
Multiple Airlines Logo
9:30 am - 7:25 pm
TRS
-
IAD
15h 55m
1 stop
$1,139Multiple Airlines
Sun, May 17 - Sun, May 24
Multiple Airlines Logo
5:25 pm - 10:35 pm
IAD
-
TRS
23h 10m
2 stops
Multiple Airlines Logo
9:30 am - 7:25 pm
TRS
-
IAD
15h 55m
1 stop
$1,150Multiple Airlines
Tue, May 19 - Sun, May 24
Multiple Airlines Logo
3:25 pm - 2:05 pm
IAD
-
TRS
16h 40m
2 stops
Multiple Airlines Logo
9:30 am - 7:25 pm
TRS
-
IAD
15h 55m
1 stop
$1,152Multiple Airlines
Mon, May 18 - Sun, May 24

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
May 8
IAD4:30 pmWashington, D.C. Dulles Intl
11h 55m
1 stop
TRS10:25 amTrieste Ronchi dei Legionari
May 12
TRS6:35 amTrieste Ronchi dei Legionari
13h 55m
1 stop
IAD2:30 pmWashington, D.C. Dulles Intl
$1,125
ITA Airways
May 12
IAD4:30 pmWashington, D.C. Dulles Intl
11h 55m
1 stop
TRS10:25 amTrieste Ronchi dei Legionari
May 26
TRS6:35 amTrieste Ronchi dei Legionari
13h 55m
1 stop
IAD2:30 pmWashington, D.C. Dulles Intl
$1,184
ITA Airways
May 17
IAD4:30 pmWashington, D.C. Dulles Intl
11h 55m
1 stop
TRS10:25 amTrieste Ronchi dei Legionari
May 25
TRS7:15 pmTrieste Ronchi dei Legionari
25h 15m
1 stop
IAD2:30 pmWashington, D.C. Dulles Intl
$1,257

TAP AIR PORTUGAL flights from Washington, D.C. Dulles Intl Airport to Trieste

Our best TAP AIR PORTUGAL deals on Washington, D.C. Dulles Intl Airport to Trieste flight tickets
TAP AIR PORTUGAL
May 12
IAD10:35 pmWashington, D.C. Dulles Intl
37h 55m
2 stops
TRS6:30 pmTrieste Ronchi dei Legionari
May 26
TRS6:35 amTrieste Ronchi dei Legionari
20h 00m
2 stops
IAD8:35 pmWashington, D.C. Dulles Intl
$1,234
TAP AIR PORTUGAL
May 12
IAD10:35 pmWashington, D.C. Dulles Intl
37h 55m
2 stops
TRS6:30 pmTrieste Ronchi dei Legionari
May 26
TRS6:35 amTrieste Ronchi dei Legionari
38h 35m
2 stops
IAD3:10 pmWashington, D.C. Dulles Intl
$1,238
TAP AIR PORTUGAL
May 17
IAD10:35 pmWashington, D.C. Dulles Intl
42h 20m
2 stops
TRS10:55 pmTrieste Ronchi dei Legionari
May 27
TRS6:35 amTrieste Ronchi dei Legionari
38h 35m
2 stops
IAD3:10 pmWashington, D.C. Dulles Intl
$1,253

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 March 31, 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 5/8

5:05 pm-10:55 pm

3 stops23h 50m

Trieste Ronchi dei Legionari

Tue 5/12

1:30 pm-3:10 pm

2 stops31h 40m

$988

Washington, D.C.Trieste

IAD - TRS

IADTRS

Washington, D.C. Dulles Intl

Fri 5/8

5:05 pm-10:55 pm

3 stops23h 50m

Trieste Ronchi dei Legionari

Tue 5/12

7:15 pm-8:35 pm

3 stops31h 20m

$1,050

Washington, D.C.Trieste

IAD - TRS

IADTRS

Washington, D.C. Dulles Intl

Mon 5/11

10:35 pm-11:35 pm

2 stops19h 00m

Trieste Ronchi dei Legionari

Mon 5/18

7:15 pm-3:10 pm

3 stops25h 55m

$1,063

Washington, D.C.Trieste

IAD - TRS

IADTRS

Washington, D.C. Dulles Intl

Mon 5/11

8:30 pm-10:25 pm

3 stops19h 55m

Trieste Ronchi dei Legionari

Mon 5/18

3:15 pm-3:10 pm

3 stops29h 55m

$1,070

Washington, D.C.Trieste

IAD - TRS

IADTRS

Washington, D.C. Dulles Intl

Fri 5/8

1:20 pm-5:00 pm

2 stops21h 40m

Trieste Ronchi dei Legionari

Tue 5/12

1:30 pm-3:10 pm

2 stops31h 40m

$1,095
Quickest round-trip

Washington, D.C.Trieste

IAD - TRS

IADTRS

Washington, D.C. Dulles Intl

Fri 5/8

4:30 pm-10:25 am

1 stop11h 55m

Trieste Ronchi dei Legionari

Tue 5/12

6:35 am-2:30 pm

1 stop13h 55m

$1,125

Washington, D.C.Trieste

IAD - TRS

IADTRS

Washington, D.C. Dulles Intl

Mon 5/11

10:35 pm-11:35 pm

2 stops19h 00m

Trieste Ronchi dei Legionari

Mon 5/18

3:15 pm-3:10 pm

2 stops29h 55m

$1,127

Washington, D.C.Trieste

IAD - TRS

IADTRS

Washington, D.C. Dulles Intl

Sun 5/17

10:20 pm-11:45 pm

2 stops19h 25m

Trieste Ronchi dei Legionari

Sun 5/24

9:30 am-7:25 pm

1 stop15h 55m

$1,139

Washington, D.C.Trieste

IAD - TRS

IADTRS

Washington, D.C. Dulles Intl

Tue 5/19

5:25 pm-10:35 pm

2 stops23h 10m

Trieste Ronchi dei Legionari

Sun 5/24

9:30 am-7:25 pm

1 stop15h 55m

$1,150

Washington, D.C.Trieste

IAD - TRS

IADTRS

Washington, D.C. Dulles Intl

Mon 5/18

3:25 pm-2:05 pm

2 stops16h 40m

Trieste Ronchi dei Legionari

Sun 5/24

9:30 am-7:25 pm

1 stop15h 55m

$1,152

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 15 resultsSorted by cheapest first
1
2

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?

Emirates, United Airlines, and ITA Airways 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 48% 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

11h 15m

Direct flights

None
The fastest flight from Washington, D.C. Dulles Intl Airport to Trieste takes 11h 15m
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 11h 15m.

  • 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 $866Free CancellationRating
6.7
1,174 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.

An easier way to manage your Trieste trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Thu 4/30
Thu 5/7
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Italy

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
TAP AIR PORTUGAL
Lufthansa
Aer Lingus
Scandinavian Airlines
Delta
British Airways
SWISS