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Cheap flights from Washington, D.C. Dulles Intl Airport to Trieste from $321

This is the cheapest one-way 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 11/18. 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.
Multiple Airlines Logo
5:30 pm - 6:40 pmIAD-TRS
19h 10m2 stops
Multiple Airlines Logo
6:10 pm - 9:00 pmTRS-IAD
32h 50m2 stops
$713Multiple Airlines
Find Deal
Sat, Nov 29 - Sat, Dec 6
Multiple Airlines Logo
5:30 pm - 6:40 pmIAD-TRS
19h 10m2 stops
Multiple Airlines Logo
3:15 pm - 9:00 pmTRS-IAD
35h 45m3 stops
$746Multiple Airlines
Find Deal
Sat, Nov 29 - Sat, Dec 6
Multiple Airlines Logo
7:40 pm - 10:25 amIAD-TRS
32h 45m3 stops
Multiple Airlines Logo
3:15 pm - 6:30 pmTRS-IAD
33h 15m3 stops
$754Multiple Airlines
Find Deal
Sun, Nov 30 - Sun, Dec 7
Turkish Airlines Logo
2:30 pm - 6:30 pmIAD-TRS
23h 00m2 stops
Turkish Airlines Logo
6:35 am - 12:45 pmTRS-IAD
35h 10m2 stops
$1,050Turkish Airlines
Find Deal
Mon, Mar 16 - Sat, Mar 21
Turkish Airlines Logo
10:15 pm - 10:55 pmIAD-TRS
43h 40m2 stops
Turkish Airlines Logo
11:15 am - 11:45 amTRS-IAD
30h 30m2 stops
$1,080Turkish Airlines
Find Deal
Tue, Oct 28 - Tue, Nov 4
Lufthansa Logo
6:00 pm - 2:00 pmIAD-TRS
14h 00m1 stop
Lufthansa Logo
3:00 pm - 3:50 pmTRS-IAD
30h 50m1 stop
$1,135Lufthansa
Find Deal
Sun, Nov 30 - Sun, Dec 7
Lufthansa Logo
6:00 pm - 2:05 pmIAD-TRS
14h 05m1 stop
Lufthansa Logo
6:25 am - 3:50 pmTRS-IAD
15h 25m1 stop
$1,144Lufthansa
Find Deal
Sat, Nov 29 - Sat, Dec 6
ITA Airways Logo
12:43 pm - 10:25 amIAD-TRS
15h 42m2 stops
ITA Airways Logo
7:15 pm - 2:40 pmTRS-IAD
25h 25m1 stop
$1,200ITA Airways
Find Deal
Thu, Apr 2 - Mon, Apr 6
ITA Airways Logo
12:43 pm - 10:25 amIAD-TRS
15h 42m2 stops
ITA Airways Logo
7:15 pm - 9:09 pmTRS-IAD
31h 54m2 stops
$1,320ITA Airways
Find Deal
Thu, Apr 2 - Mon, Apr 6
Emirates Logo
10:30 am - 6:30 pmIAD-TRS
50h 00m2 stops
Emirates Logo
3:15 pm - 8:10 amTRS-IAD
46h 55m2 stops
$2,151Emirates
Find Deal
Sun, Nov 30 - Sun, Dec 7

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
Apr 2
IAD12:43 pmWashington, D.C. Dulles Intl
15h 42m
2 stops
TRS10:25 amTrieste Ronchi dei Legionari
Apr 6
TRS7:15 pmTrieste Ronchi dei Legionari
25h 25m
1 stop
IAD2:40 pmWashington, D.C. Dulles Intl
$1,200
Find similar
ITA Airways
Apr 2
IAD12:43 pmWashington, D.C. Dulles Intl
15h 42m
2 stops
TRS10:25 amTrieste Ronchi dei Legionari
Apr 6
TRS7:15 pmTrieste Ronchi dei Legionari
31h 54m
2 stops
IAD9:09 pmWashington, D.C. Dulles Intl
$1,320
Find similar

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

Our best Lufthansa deals on Washington, D.C. Dulles Intl Airport to Trieste flight tickets
Lufthansa
Nov 30
IAD6:00 pmWashington, D.C. Dulles Intl
14h 00m
1 stop
TRS2:00 pmTrieste Ronchi dei Legionari
Dec 7
TRS3:00 pmTrieste Ronchi dei Legionari
30h 50m
1 stop
IAD3:50 pmWashington, D.C. Dulles Intl
$1,135
Find similar
Lufthansa
Nov 29
IAD6:00 pmWashington, D.C. Dulles Intl
14h 05m
1 stop
TRS2:05 pmTrieste Ronchi dei Legionari
Dec 6
TRS6:25 amTrieste Ronchi dei Legionari
15h 25m
1 stop
IAD3:50 pmWashington, D.C. Dulles Intl
$1,144
Find similar
Lufthansa
Apr 2
IAD6:10 pmWashington, D.C. Dulles Intl
13h 55m
1 stop
TRS2:05 pmTrieste Ronchi dei Legionari
Apr 6
TRS2:45 pmTrieste Ronchi dei Legionari
31h 05m
1 stop
IAD3:50 pmWashington, D.C. Dulles Intl
$1,358
Find similar

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 October 16, 2025.
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

Sat 11/29

5:30 pm-6:40 pm

2 stops19h 10m

Trieste Ronchi dei Legionari

Sat 12/6

6:10 pm-9:00 pm

2 stops32h 50m

$713

Washington, D.C.Trieste

IAD - TRS

IADTRS

Washington, D.C. Dulles Intl

Sat 11/29

5:30 pm-6:40 pm

2 stops19h 10m

Trieste Ronchi dei Legionari

Sat 12/6

3:15 pm-9:00 pm

3 stops35h 45m

$746

Washington, D.C.Trieste

IAD - TRS

IADTRS

Washington, D.C. Dulles Intl

Sun 11/30

7:40 pm-10:25 am

3 stops32h 45m

Trieste Ronchi dei Legionari

Sun 12/7

3:15 pm-6:30 pm

3 stops33h 15m

$754

Washington, D.C.Trieste

IAD - TRS

IADTRS

Washington, D.C. Dulles Intl

Mon 3/16

2:30 pm-6:30 pm

2 stops23h 00m

Trieste Ronchi dei Legionari

Sat 3/21

6:35 am-12:45 pm

2 stops35h 10m

$1,050

Washington, D.C.Trieste

IAD - TRS

IADTRS

Washington, D.C. Dulles Intl

Tue 10/28

10:15 pm-10:55 pm

2 stops43h 40m

Trieste Ronchi dei Legionari

Tue 11/4

11:15 am-11:45 am

2 stops30h 30m

$1,080

Washington, D.C.Trieste

IAD - TRS

IADTRS

Washington, D.C. Dulles Intl

Sun 11/30

6:00 pm-2:00 pm

1 stop14h 00m

Trieste Ronchi dei Legionari

Sun 12/7

3:00 pm-3:50 pm

1 stop30h 50m

$1,135

Washington, D.C.Trieste

IAD - TRS

IADTRS

Washington, D.C. Dulles Intl

Sat 11/29

6:00 pm-2:05 pm

1 stop14h 05m

Trieste Ronchi dei Legionari

Sat 12/6

6:25 am-3:50 pm

1 stop15h 25m

$1,144

Washington, D.C.Trieste

IAD - TRS

IADTRS

Washington, D.C. Dulles Intl

Thu 4/2

12:43 pm-10:25 am

2 stops15h 42m

Trieste Ronchi dei Legionari

Mon 4/6

7:15 pm-2:40 pm

1 stop25h 25m

$1,200

Washington, D.C.Trieste

IAD - TRS

IADTRS

Washington, D.C. Dulles Intl

Thu 4/2

12:43 pm-10:25 am

2 stops15h 42m

Trieste Ronchi dei Legionari

Mon 4/6

7:15 pm-9:09 pm

2 stops31h 54m

$1,320

Washington, D.C.Trieste

IAD - TRS

IADTRS

Washington, D.C. Dulles Intl

Sun 11/30

10:30 am-6:30 pm

2 stops50h 00m

Trieste Ronchi dei Legionari

Sun 12/7

3:15 pm-8:10 am

2 stops46h 55m

$2,151

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 resultsSorted by cheapest first
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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 day to depart on your flight to Trieste?

The cheapest day to depart on your flight to Trieste is on a Tuesday when prices can be found for as low as $866. This is often the case because there is less demand to fly during this day of the week. Flights from Washington, D.C. Dulles Intl Airport to Trieste on a Friday will generally be more expensive and average around $988. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

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

Direct flights

None
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.
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  • 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 13h 55m.

  • 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
1,068 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

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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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Airlines are sorted and displayed according to clicks in the past 7 days on momondo
Delta
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United Airlines
Turkish Airlines
Lufthansa
Frontier
British Airways
Qatar Airways
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Alaska Airlines
Emirates