$717 Cheap Flights from Trieste (TRS) to Washington (IAD)

View $717 flight on Wed, Nov 5, 2025Opens in a new window

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

Cheap Flights from Trieste to Washington (TRS-IAD)

Prices were available within the past 7 days and start at $717 for one-way flights and $598 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

ITA Airways
Fri, Sep 26 - Mon, Sep 29
TRS
Trieste
IAD
Washington
$598 Roundtrip, found 5 days ago
$598
Roundtrip
found 5 days ago
Select ITA Airways flight, departing Fri, Sep 26 from Trieste to Washington, returning Mon, Sep 29, priced at $598 found 5 days ago
ITA Airways
Thu, Aug 28 - Sun, Sep 14
TRS
Trieste
IAD
Washington
$600 Roundtrip, found 1 day ago
$600
Roundtrip
found 1 day ago
Select ITA Airways flight, departing Thu, Aug 28 from Trieste to Washington, returning Sun, Sep 14, priced at $600 found 1 day ago
Lufthansa
Fri, Sep 26 - Mon, Sep 29
TRS
Trieste
IAD
Washington
$616 Roundtrip, found 5 days ago
$616
Roundtrip
found 5 days ago
Select Lufthansa flight, departing Fri, Sep 26 from Trieste to Washington, returning Mon, Sep 29, priced at $616 found 5 days ago
Lufthansa
Wed, Aug 27 - Sun, Aug 31
TRS
Trieste
IAD
Washington
$617 Roundtrip, found 6 days ago
$617
Roundtrip
found 6 days ago
Select Lufthansa flight, departing Wed, Aug 27 from Trieste to Washington, returning Sun, Aug 31, priced at $617 found 6 days ago
ITA Airways
Fri, Sep 26 - Tue, Sep 30
TRS
Trieste
IAD
Washington
$620 Roundtrip, found 5 days ago
$620
Roundtrip
found 5 days ago
Select ITA Airways flight, departing Fri, Sep 26 from Trieste to Washington, returning Tue, Sep 30, priced at $620 found 5 days ago
ITA Airways
Thu, Aug 28 - Thu, Sep 11
TRS
Trieste
IAD
Washington
$626 Roundtrip, found 1 day ago
$626
Roundtrip
found 1 day ago
Select ITA Airways flight, departing Thu, Aug 28 from Trieste to Washington, returning Thu, Sep 11, priced at $626 found 1 day ago
Lufthansa
Fri, Sep 26 - Mon, Sep 29
TRS
Trieste
IAD
Washington
$634 Roundtrip, found 5 days ago
$634
Roundtrip
found 5 days ago
Select Lufthansa flight, departing Fri, Sep 26 from Trieste to Washington, returning Mon, Sep 29, priced at $634 found 5 days ago
Air Dolomiti
Sun, Aug 31 - Thu, Sep 11
TRS
Trieste
IAD
Washington
$711 Roundtrip, found 1 day ago
$711
Roundtrip
found 1 day ago
Select Air Dolomiti flight, departing Sun, Aug 31 from Trieste to Washington, returning Thu, Sep 11, priced at $711 found 1 day ago
KLM
Sat, Aug 30 - Sat, Sep 13
TRS
Trieste
IAD
Washington
$850 Roundtrip, found 1 day ago
$850
Roundtrip
found 1 day ago
Select KLM flight, departing Sat, Aug 30 from Trieste to Washington, returning Sat, Sep 13, priced at $850 found 1 day ago
Air France
Sat, Aug 30 - Sat, Sep 13
TRS
Trieste
IAD
Washington
$957 Roundtrip, found 1 day ago
$957
Roundtrip
found 1 day ago
Select Air France flight, departing Sat, Aug 30 from Trieste to Washington, returning Sat, Sep 13, priced at $957 found 1 day ago

Alternative airports near Washington

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

Select flight to Washington Dulles Intl. IAD. Cheapest option available. Average driving time to city center is 36 minutes. Flights from $600
IAD
Washington Dulles Intl.
Cheapest
Average driving time to city center36 min
Flights from $600
Flights from Trieste (TRS) to Washington (IAD)
Origin airport
Friuli Venezia Giulia
Destination airport
Washington Dulles Intl.
Airlines serving
Air France, Austrian Airlines, ITA Airways, KLM, Lufthansa, TAP Portugal, Turkish Airlines
Roundtrip price
$598
Distance
4405 mi

Trieste to Washington Flights

The cheapest times to fly from Trieste to Washington

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 Trieste to Washington are during the month of September. You can find some of the cheapest flights from Trieste to Washington with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Trieste to Washington

Sunday is one of the best days to book for cheap flights from Trieste to Washington: 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 Trieste to Washington

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 Trieste to Washington in 2025. You can also book with separate airlines for your outbound and return journeys, from $717 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 Trieste to Washington 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 Trieste to Washington 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.

 

Frequently asked questions

How much does a flight from Friuli Venezia Giulia Airport (TRS) to Washington Dulles Intl. Airport (IAD) cost?
Get a cheap one-way flight from $717 or cheap return flight from $598 from Friuli Venezia Giulia Airport (TRS) to Washington Dulles Intl. Airport (IAD) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Friuli Venezia Giulia Airport (TRS) to Washington Dulles Intl. Airport (IAD)?
Traveling in September may help you find better deals, as it's the cheapest month for flights between TRS and IAD. You'll often find the lowest prices during the off-season.
What is the cheapest airline that flies from Friuli Venezia Giulia Airport (TRS) to Washington Dulles Intl. Airport (IAD)?
To find the cheapest airline flying from TRS to IAD, use Expedia's filter tool. Tailor your search based on your travel style, such as preferred carriers and flight duration. You can then sort your results by "Price (lowest to highest)" to see the most affordable options first.
How many flights per day from Friuli Venezia Giulia Airport (TRS) to Washington Dulles Intl. Airport (IAD)?
You'll need to take a flight with a layover when traveling from Friuli Venezia Giulia Airport (TRS) to Washington Dulles Intl. Airport (IAD). Direct flights don't operate daily on this route. However, simply filter your search to include one or two stops to find the best option for your trip.
What day of the week has the most flights from TRS to IAD?
Friday is generally the busiest day for flights, while Tuesday tends to be the quietest.* Keep in mind that flight schedules can vary depending on a range of factors, including the carrier and season.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Friuli Venezia Giulia Airport (TRS) to Washington Dulles Intl. Airport (IAD)?
To avoid possible delays on the Friuli Venezia Giulia Airport (TRS) to Washington Dulles Intl. Airport (IAD) route, fly before 3 PM. Departures after this time are 22% more likely to be canceled.**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 Friuli Venezia Giulia Airport (TRS) to Washington Dulles Intl. Airport (IAD) last-minute?
Booking your flight from TRS to IAD shortly before your journey is usually more expensive. However, if there's some wiggle room with your travel dates and times, you could snag a cheap last-minute fare.
Is it cheaper to book a TRS to IAD flight and hotel package?
Securing a TRS to IAD flight and hotel package is typically cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your trip all in one place. Pick from our extensive range of hotels and then add car rentals, flights and activities to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Friuli Venezia Giulia Airport (TRS) to Washington Dulles Intl. Airport (IAD)?
If you reserved your TRS to IAD flight within the last 24 hours, you may be able to cancel or modify it without any fees. Depending on the airline and the ticket type you purchased, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, visit our Customer Service portal if you'd like more information.

Explore a world of travel with Expedia

*Available to One Key members.