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

Turkish Airlines 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 46% of people opting to fly with this airline when traveling to Trieste. Keep in mind that there are 11 different airlines that fly to Trieste on a routine basis, so you have a few additional options to choose from.

Which layover airport offers the lowest fares from Washington, D.C. to Trieste?

Flights via Frankfurt am Main (FRA) offer the lowest average round-trip price of $667.

Which layover airport has the shortest travel time from Washington, D.C. to Trieste?

Flights connecting via Frankfurt am Main (FRA) have the shortest average one-way travel time: 14h 00m.

Which airport is the most popular layover for flights between Washington, D.C. and Trieste?

Rome (FCO) was the most common stop: 50% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport has the shortest connection time from Washington, D.C. to Trieste?

Frankfurt am Main (FRA) has the shortest average layover time for this route: 2h 58m.

How long does it take to fly to Trieste?

Average flight duration from Washington, D.C. to Trieste depends on which airport you fly into and out of. Flying from Baltimore to Venice Marco Polo Airport is 10h 45m on average, while flying from Washington, D.C. to Venice Marco Polo Airport is 11h 47m on average. Venice Marco Polo Airport is the most popular airport in Trieste.

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?

There is 1 operator available for flights from Washington, D.C. to Trieste Ronchi dei Legionari Airport as of October 2025.

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.

$619 Cheap Flights from Washington, D.C. to Trieste in 2025/26

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Cheap round-trip flights

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11:30 pm - 6:30 pmIAD-TRS

38h 00m2 stops

3:15 pm - 4:15 pmTRS-IAD

30h 00m2 stops

$710TAP AIR PORTUGAL

Find Deal

Wed, Mar 11 - Sun, Mar 22

12:44 pm - 2:30 pmIAD-TRS

20h 46m2 stops

6:35 am - 3:40 pmTRS-IAD

14h 05m1 stop

$819ITA Airways

Find Deal

Wed, Mar 11 - Sun, Mar 22

7:00 pm - 2:05 pmIAD-TRS

14h 05m1 stop

3:00 pm - 4:50 pmTRS-IAD

30h 50m1 stop

$905Lufthansa

Find Deal

Wed, Mar 11 - Sun, Mar 22

5:05 pm - 10:25 amIAD-TRS

35h 20m3 stops

3:15 pm - 7:30 pmTRS-IAD

34h 15m3 stops

$948Multiple Airlines

Find Deal

Sat, Dec 13 - Sat, Dec 20

7:40 pm - 10:25 amBWI-TRS

32h 45m3 stops

6:35 am - 6:40 pmTRS-BWI

18h 05m3 stops

$975Multiple Airlines

Find Deal

Fri, Dec 12 - Fri, Dec 19

5:15 pm - 2:05 pmIAD-TRS

14h 50m1 stop

3:00 pm - 2:35 pmTRS-IAD

29h 35m1 stop

$1,206Lufthansa

Find Deal

Sat, Dec 13 - Sat, Dec 20

5:10 pm - 10:25 amIAD-TRS

11h 15m1 stop

6:35 am - 2:05 pmTRS-IAD

13h 30m1 stop

$1,396United Airlines

Find Deal

Sun, Apr 26 - Sat, May 9

12:35 pm - 10:25 amIAD-TRS

15h 50m2 stops

6:35 am - 6:56 pmTRS-IAD

18h 21m2 stops

$1,400United Airlines

Find Deal

Sun, Apr 26 - Sat, May 9

10:30 am - 6:30 pmIAD-TRS

50h 00m2 stops

11:15 am - 9:00 amTRS-IAD

50h 45m2 stops

$1,843Emirates

Find Deal

Mon, Mar 2 - Fri, Mar 13

10:30 am - 10:55 pmIAD-TRS

30h 25m2 stops

3:15 pm - 8:10 amTRS-IAD

46h 55m2 stops

$7,782Emirates

Find Deal

Sat, Jan 31 - Fri, Feb 6

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

Our best ITA Airways deals on Washington, D.C. to Trieste flight tickets

ITA Airways

Mar 11

IAD12:44 pmWashington, D.C. Dulles Intl

20h 46m

2 stops

TRS2:30 pmTrieste Ronchi dei Legionari

Mar 22

TRS6:35 amTrieste Ronchi dei Legionari

14h 05m

1 stop

IAD3:40 pmWashington, D.C. Dulles Intl

$819

Find similar

ITA Airways

Jan 2

IAD12:43 pmWashington, D.C. Dulles Intl

19h 47m

2 stops

TRS2:30 pmTrieste Ronchi dei Legionari

Jul 1

TRS7:15 pmTrieste Ronchi dei Legionari

25h 25m

1 stop

IAD2:40 pmWashington, D.C. Dulles Intl

$998

Find similar

ITA Airways

Jan 2

IAD12:43 pmWashington, D.C. Dulles Intl

19h 47m

2 stops

TRS2:30 pmTrieste Ronchi dei Legionari

Jul 1

TRS6:35 amTrieste Ronchi dei Legionari

20h 34m

2 stops

IAD9:09 pmWashington, D.C. Dulles Intl

$1,001

Find similar

Lufthansa flights from Washington, D.C. to Trieste

Our best Lufthansa deals on Washington, D.C. to Trieste flight tickets

Lufthansa

Mar 11

IAD7:00 pmWashington, D.C. Dulles Intl

14h 05m

1 stop

TRS2:05 pmTrieste Ronchi dei Legionari

Mar 22

TRS3:00 pmTrieste Ronchi dei Legionari

30h 50m

1 stop

IAD4:50 pmWashington, D.C. Dulles Intl

$905

Find similar

Lufthansa

Dec 13

IAD5:15 pmWashington, D.C. Dulles Intl

14h 50m

1 stop

TRS2:05 pmTrieste Ronchi dei Legionari

Dec 20

TRS3:00 pmTrieste Ronchi dei Legionari

29h 35m

1 stop

IAD2:35 pmWashington, D.C. Dulles Intl

$1,206

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

$1,359

Find similar

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.Trieste

IAD - TRS

IADTRS

Washington, D.C. Dulles Intl

Wed 3/11

11:30 pm-6:30 pm

2 stops38h 00m

Trieste Ronchi dei Legionari

Sun 3/22

3:15 pm-4:15 pm

2 stops30h 00m

$710

Washington, D.C.Trieste

IAD - TRS

IADTRS

Washington, D.C. Dulles Intl

Wed 3/11

12:44 pm-2:30 pm

2 stops20h 46m

Trieste Ronchi dei Legionari

Sun 3/22

6:35 am-3:40 pm

1 stop14h 05m

$819

Washington, D.C.Trieste

IAD - TRS

IADTRS

Washington, D.C. Dulles Intl

Wed 3/11

7:00 pm-2:05 pm

1 stop14h 05m

Trieste Ronchi dei Legionari

Sun 3/22

3:00 pm-4:50 pm

1 stop30h 50m

$905

Washington, D.C.Trieste

IAD - TRS

IADTRS

Washington, D.C. Dulles Intl

Sat 12/13

5:05 pm-10:25 am

3 stops35h 20m

Trieste Ronchi dei Legionari

Sat 12/20

3:15 pm-7:30 pm

3 stops34h 15m

$948

BaltimoreTrieste

BWI - TRS

BWITRS

Baltimore/Washington

Fri 12/12

7:40 pm-10:25 am

3 stops32h 45m

Trieste Ronchi dei Legionari

Fri 12/19

6:35 am-6:40 pm

3 stops18h 05m

$975

Washington, D.C.Trieste

IAD - TRS

IADTRS

Washington, D.C. Dulles Intl

Sat 12/13

5:15 pm-2:05 pm

1 stop14h 50m

Trieste Ronchi dei Legionari

Sat 12/20

3:00 pm-2:35 pm

1 stop29h 35m

$1,206

Washington, D.C.Trieste

IAD - TRS

IADTRS

Washington, D.C. Dulles Intl

Sun 4/26

5:10 pm-10:25 am

1 stop11h 15m

Trieste Ronchi dei Legionari

Sat 5/9

6:35 am-2:05 pm

1 stop13h 30m

$1,396

Washington, D.C.Trieste

IAD - TRS

IADTRS

Washington, D.C. Dulles Intl

Sun 4/26

12:35 pm-10:25 am

2 stops15h 50m

Trieste Ronchi dei Legionari

Sat 5/9

6:35 am-6:56 pm

2 stops18h 21m

$1,400

Washington, D.C.Trieste

IAD - TRS

IADTRS

Washington, D.C. Dulles Intl

Mon 3/2

10:30 am-6:30 pm

2 stops50h 00m

Trieste Ronchi dei Legionari

Fri 3/13

11:15 am-9:00 am

2 stops50h 45m

$1,843

Washington, D.C.Trieste

IAD - TRS

IADTRS

Washington, D.C. Dulles Intl

Sat 1/31

10:30 am-10:55 pm

2 stops30h 25m

Trieste Ronchi dei Legionari

Fri 2/6

3:15 pm-8:10 am

2 stops46h 55m

$7,782

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 resultsSorted by cheapest first

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

Prices

Airlines

Layovers

Other information

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. 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. 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

Direct flights	None

There are no direct flights from Washington, D.C. to Trieste. There are no popular flight routes from Washington, D.C. to Trieste.

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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 11h 15m, 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?
There is 1 operator available for flights from Washington, D.C. to Trieste Ronchi dei Legionari Airport as of October 2025.
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?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Washington, D.C. to Trieste is ITA Airways (100% of total bookings).

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 Airways	PriceFrom $664	Free Cancellation	Rating 6.7 1,078 reviews		Search ITA Airways flights

Udine

Grado

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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.

An easier way to manage your Trieste trip

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Cheap flights from Washington, D.C. to Trieste from $710

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. to Trieste departing on 3/11. 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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ITA Airways flights from Washington, D.C. to Trieste

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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 day to depart on your flight to Trieste?

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

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

What airlines fly to Trieste?

Which airport is the most popular layover for flights between Washington, D.C. and Trieste?

Rome (FCO) was the most common stop: 50% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport offers the lowest fares from Washington, D.C. to Trieste?

Flights via Frankfurt am Main (FRA) offer the lowest average round-trip price of $667.

Which layover airport has the shortest travel time from Washington, D.C. to Trieste?

Flights connecting via Frankfurt am Main (FRA) have the shortest average one-way travel time: 14h 00m.

Which layover airport has the shortest connection time from Washington, D.C. to Trieste?

Frankfurt am Main (FRA) has the shortest average layover time for this route: 2h 58m.

How long does it take to fly to Trieste?

When to book flights from Washington, D.C. to Trieste

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

Direct flights

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

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

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?

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

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

Traveling to a place near Trieste?

Why use momondo?

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

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

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

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

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.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

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