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Cheap flights from Washington, D.C. to Trieste from $453

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. to Trieste departing on 5/25. 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

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Find the cheapest flights from Washington, D.C. to Trieste

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
2:30 pm - 10:45 pm
IAD
-
TRS
27h 15m
2 stops
Multiple Airlines Logo
11:15 am - 12:45 pm
TRS
-
IAD
30h 30m
3 stops
$873Multiple Airlines
Fri, Mar 13 - Fri, Mar 20
Icelandair Logo
8:30 pm - 6:30 pm
BWI
-
TRS
16h 00m
2 stops
Icelandair Logo
11:15 am - 7:25 pm
TRS
-
BWI
38h 10m
2 stops
$887Icelandair
Thu, May 14 - Mon, May 25
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
$911Icelandair
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
Multiple Airlines Logo
11:20 pm - 6:30 pm
IAD
-
TRS
37h 10m
2 stops
Multiple Airlines Logo
11:15 am - 10:15 pm
TRS
-
IAD
17h 00m
2 stops
$971Multiple Airlines
Fri, May 15 - Sun, May 24
Multiple Airlines Logo
2:30 pm - 10:55 pm
IAD
-
TRS
27h 25m
3 stops
Multiple Airlines Logo
11:15 am - 12:45 pm
TRS
-
IAD
30h 30m
3 stops
$1,014Multiple Airlines
Fri, Mar 13 - Fri, Mar 20
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
$1,073ITA Airways
Fri, May 15 - Sun, May 24
Lufthansa Logo
7:00 pm - 2:05 pm
IAD
-
TRS
14h 05m
1 stop
Lufthansa Logo
6:25 am - 4:50 pm
TRS
-
IAD
15h 25m
1 stop
$1,134Lufthansa
Fri, Mar 13 - Fri, Mar 20
KLM Logo
5:09 pm - 2:30 pm
DCA
-
TRS
16h 21m
2 stops
KLM Logo
6:35 am - 9:41 pm
TRS
-
DCA
20h 06m
2 stops
$1,288KLM
Thu, Mar 12 - Thu, Mar 19
KLM Logo
5:30 pm - 2:30 pm
BWI
-
TRS
40h 00m
2 stops
KLM Logo
3:15 pm - 10:14 pm
TRS
-
BWI
35h 59m
2 stops
$2,382KLM
Sat, Mar 14 - Sat, Mar 21

Icelandair flights from Washington, D.C. to Trieste

Our best Icelandair deals on Washington, D.C. to Trieste flight tickets
Icelandair
May 14
BWI8:30 pmBaltimore/Washington
16h 00m
2 stops
TRS6:30 pmTrieste Ronchi dei Legionari
May 25
TRS11:15 amTrieste Ronchi dei Legionari
38h 10m
2 stops
BWI7:25 pmBaltimore/Washington
$887
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
$911
Icelandair
May 22
BWI8:30 pmBaltimore/Washington
40h 00m
2 stops
TRS6:30 pmTrieste Ronchi dei Legionari
May 28
TRS11:15 amTrieste Ronchi dei Legionari
38h 10m
2 stops
BWI7:25 pmBaltimore/Washington
$1,228

ITA Airways flights from Washington, D.C. to Trieste

Our best ITA Airways deals on Washington, D.C. to Trieste flight tickets
ITA Airways
May 15
IAD4:30 pmWashington, D.C. Dulles Intl
11h 55m
1 stop
TRS10:25 amTrieste Ronchi dei Legionari
May 24
TRS6:35 amTrieste Ronchi dei Legionari
13h 55m
1 stop
IAD2:30 pmWashington, D.C. Dulles Intl
$1,073
ITA Airways
Mar 13
IAD12:55 pmWashington, D.C. Dulles Intl
24h 35m
2 stops
TRS6:30 pmTrieste Ronchi dei Legionari
Mar 20
TRS1:05 pmTrieste Ronchi dei Legionari
55h 35m
2 stops
IAD3:40 pmWashington, D.C. Dulles Intl
$1,273
ITA Airways
May 22
IAD4:30 pmWashington, D.C. Dulles Intl
16h 00m
1 stop
TRS2:30 pmTrieste Ronchi dei Legionari
May 28
TRS7:15 pmTrieste Ronchi dei Legionari
25h 15m
1 stop
IAD2:30 pmWashington, D.C. Dulles Intl
$1,385

momondo Fare Finder

 
Customize your flight search to find flights from Washington, D.C. 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 January 29, 2026.
Use the filters below to find and compare flights from Washington, D.C. 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

Fri 3/13

2:30 pm-10:45 pm

2 stops27h 15m

Trieste Ronchi dei Legionari

Fri 3/20

11:15 am-12:45 pm

3 stops30h 30m

$873

BaltimoreTrieste

BWI - TRS

BWITRS

Baltimore/Washington

Thu 5/14

8:30 pm-6:30 pm

2 stops16h 00m

Trieste Ronchi dei Legionari

Mon 5/25

11:15 am-7:25 pm

2 stops38h 10m

$887

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

$911

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 5/15

11:20 pm-6:30 pm

2 stops37h 10m

Trieste Ronchi dei Legionari

Sun 5/24

11:15 am-10:15 pm

2 stops17h 00m

$971

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 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

DCA - TRS

DCATRS

Washington, D.C. Reagan-National

Thu 3/12

5:09 pm-2:30 pm

2 stops16h 21m

Trieste Ronchi dei Legionari

Thu 3/19

6:35 am-9:41 pm

2 stops20h 06m

$1,288

BaltimoreTrieste

BWI - TRS

BWITRS

Baltimore/Washington

Sat 3/14

5:30 pm-2:30 pm

2 stops40h 00m

Trieste Ronchi dei Legionari

Sat 3/21

3:15 pm-10:14 pm

2 stops35h 59m

$2,382

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 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. 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. to Trieste Ronchi dei Legionari?

ITA Airways, Icelandair, and United Airlines are the most popular carriers operating from Washington, D.C. to Trieste Ronchi dei Legionari

What airlines fly to Trieste?

United Airlines, Turkish Airlines and British Airways are the top three most popular airlines that fly to Trieste from Washington, D.C. according to our data. United Airlines is the first choice among our users, with 47% 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. to Trieste

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. 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. to Trieste (WAS to TRS) flight deals and tips

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

Fastest flight time

14h 10m

Direct flights

None
The fastest flight from Washington, D.C. to Trieste takes 14h 10m
There are no direct flights from Washington, D.C. to Trieste. There are no popular flight routes from Washington, D.C. to Trieste.
Search flight deals

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

    A flight from Washington, D.C. to Trieste Ronchi dei Legionari will travel around 4405.3 mi. Flights usually cover this in 14h 10m, depending on flying conditions and air traffic around both airports.

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

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

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

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

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington, D.C. to Trieste Ronchi dei Legionari Airport.

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

    The travel and health documents you'll need for your trip to Trieste Ronchi dei Legionari Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Trieste Ronchi dei Legionari Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

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

Best airlines flying from Washington, D.C. to Trieste

Compare and see reviews for airlines that fly from Washington, D.C. to Trieste with momondo
Airline
Rating
Free Cancellation
Price
ITA AirwaysPriceFrom $664Free CancellationRating
6.7
1,137 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?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Washington, D.C. to Trieste. momondo saves you time and could save you money on your trip.

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

Yes. momondo allows you to filter the results for Washington, D.C. to Trieste flights to just show those with 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?

If you are simply researching potential flights to Trieste, momondo offers a useful price alert feature which will track prices for flights to Trieste from Washington, D.C. and alert you when they change.

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