$549 Cheap Flights from Washington (IAD) to Trieste (TRS)

View $549 flight on Wed, Dec 31, 2025Opens in a new window

Popular airlines from Washington Dulles Intl. Airport (IAD) to Friuli Venezia Giulia Airport (TRS)

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Cheap Flights from Washington to Trieste (IAD-TRS)

Prices were available within the past 7 days and start at $549 for one-way flights and $717 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

TAP Portugal
Tue, Feb 3 - Wed, Feb 18
IAD
Washington
TRS
Trieste
$717 Roundtrip, found 2 days ago
$717
Roundtrip
found 2 days ago
Select TAP Portugal flight, departing Tue, Feb 3 from Washington to Trieste, returning Wed, Feb 18, priced at $717 found 2 days ago
TAP Portugal
Mon, Nov 17 - Tue, Dec 2
IAD
Washington
TRS
Trieste
$717 Roundtrip, found 2 days ago
$717
Roundtrip
found 2 days ago
Select TAP Portugal flight, departing Mon, Nov 17 from Washington to Trieste, returning Tue, Dec 2, priced at $717 found 2 days ago
TAP Portugal
Sat, Jan 31 - Wed, Feb 18
IAD
Washington
TRS
Trieste
$737 Roundtrip, found 2 days ago
$737
Roundtrip
found 2 days ago
Select TAP Portugal flight, departing Sat, Jan 31 from Washington to Trieste, returning Wed, Feb 18, priced at $737 found 2 days ago
TAP Portugal
Mon, Dec 1 - Sun, Dec 14
IAD
Washington
TRS
Trieste
$737 Roundtrip, found 2 days ago
$737
Roundtrip
found 2 days ago
Select TAP Portugal flight, departing Mon, Dec 1 from Washington to Trieste, returning Sun, Dec 14, priced at $737 found 2 days ago
TAP Portugal
Fri, Jan 30 - Wed, Mar 4
IAD
Washington
TRS
Trieste
$741 Roundtrip, found 2 days ago
$741
Roundtrip
found 2 days ago
Select TAP Portugal flight, departing Fri, Jan 30 from Washington to Trieste, returning Wed, Mar 4, priced at $741 found 2 days ago
TAP Portugal
Fri, Jan 30 - Wed, Feb 18
IAD
Washington
TRS
Trieste
$741 Roundtrip, found 2 days ago
$741
Roundtrip
found 2 days ago
Select TAP Portugal flight, departing Fri, Jan 30 from Washington to Trieste, returning Wed, Feb 18, priced at $741 found 2 days ago
Icelandair
Mon, Mar 2 - Thu, Mar 19
IAD
Washington
TRS
Trieste
$762 Roundtrip, found 2 days ago
$762
Roundtrip
found 2 days ago
Select Icelandair flight, departing Mon, Mar 2 from Washington to Trieste, returning Thu, Mar 19, priced at $762 found 2 days ago
Air Canada
Mon, Feb 2 - Tue, Mar 3
IAD
Washington
TRS
Trieste
$788 Roundtrip, found 2 days ago
$788
Roundtrip
found 2 days ago
Select Air Canada flight, departing Mon, Feb 2 from Washington to Trieste, returning Tue, Mar 3, priced at $788 found 2 days ago
Lufthansa
Mon, Feb 2 - Tue, Mar 3
IAD
Washington
TRS
Trieste
$838 Roundtrip, found 2 days ago
$838
Roundtrip
found 2 days ago
Select Lufthansa flight, departing Mon, Feb 2 from Washington to Trieste, returning Tue, Mar 3, priced at $838 found 2 days ago
ITA Airways
Sun, Mar 15 - Mon, Mar 30
IAD
Washington
TRS
Trieste
$846 Roundtrip, found 2 days ago
$846
Roundtrip
found 2 days ago
Select ITA Airways flight, departing Sun, Mar 15 from Washington to Trieste, returning Mon, Mar 30, priced at $846 found 2 days ago

Alternative airports near Trieste

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Friuli Venezia Giulia TRS. Cheapest and Closest option available. Average driving time to city center is 33 minutes. Flights from $1,158
TRS
Friuli Venezia Giulia
CheapestClosest
Average driving time to city center33 min
Flights from $1,158

Frequently asked questions

How much does a flight from Washington Dulles Intl. Airport (IAD) to Friuli Venezia Giulia Airport (TRS) cost?
Lock in a cheap one-way flight from $549 or cheap return flight from $717 from Washington Dulles Intl. Airport (IAD) to Friuli Venezia Giulia Airport (TRS) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Washington Dulles Intl. Airport (IAD) to Friuli Venezia Giulia Airport (TRS)?
February is the least expensive month to fly from IAD to TRS. Avoiding peak travel times is often the key to landing a great deal.
What is the cheapest airline that flies from Washington Dulles Intl. Airport (IAD) to Friuli Venezia Giulia Airport (TRS)?
Expedia's filter tool lets you easily compare travel time, airlines and fares all in one place. Tailor the search to your trip, then sort by "Price (lowest to highest)" to find out which carrier offers the cheapest IAD to TRS flight.
How many flights per day from Washington Dulles Intl. Airport (IAD) to Friuli Venezia Giulia Airport (TRS)?
There are no daily direct flights departing from Washington Dulles Intl. Airport (IAD) to Friuli Venezia Giulia Airport (TRS). But you can opt for flights with layovers. Filter your search results on Expedia to include one or two stops, and you'll be soaring above the clouds in no time at all.
What day of the week has the most flights from IAD to TRS?
You'll typically find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can vary from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Washington Dulles Intl. Airport (IAD) to Friuli Venezia Giulia Airport (TRS)?
Book a flight from Washington Dulles Intl. Airport (IAD) to Friuli Venezia Giulia Airport (TRS) that takes off before 3 PM to reduce the likelihood of delays. Later departures have a 22% higher chance of being canceled, on average.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Washington Dulles Intl. Airport (IAD) to Friuli Venezia Giulia Airport (TRS) last-minute?
Holding off until just before your trip to book a ticket from IAD to TRS often results in higher prices. While you may find some last-minute discounts, they're not always guaranteed. Keep your travel plans flexible to maximize your chances of scoring a bargain.
Is it cheaper to book an IAD to TRS flight and hotel package?
You'll typically save money by booking an IAD to TRS flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's simple to manage everything in one place. After selecting your preferred flights and accommodations, you can add extras such as car rentals, tours and activities.
Can I cancel or change the date of my flight from Washington Dulles Intl. Airport (IAD) to Friuli Venezia Giulia Airport (TRS)?
In most cases, you can cancel or modify your IAD to TRS flight. However, there may be additional fees, especially if your booking was made over 24 hours ago. Check your itinerary for the airline's fees and guidelines on flight changes, or if you'd like further information, visit our Customer Service portal.

Travel information

Origin airport
Washington Dulles Intl.
Destination airport
Friuli Venezia Giulia
Airlines serving
Austrian Airlines, Brussels Airlines, ITA Airways, KLM, Lufthansa, Swiss International Air Lines, TAP Portugal, Turkish Airlines, United
Roundtrip price
$716
Distance
4405 mi

Book with confidence

Washington to Trieste Flights

The cheapest times to fly from Washington to Trieste

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Washington to Trieste are during the month of February. You can find some of the cheapest flights from Washington to Trieste with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Washington to Trieste

Sunday is one of the best days to book for cheap flights from Washington to Trieste: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Washington to Trieste

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Washington to Trieste in 2025. You can also book with separate airlines for your outbound and return journeys, from $549 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Washington to Trieste flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Washington to Trieste airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Washington to Trieste Flights

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