IAD - TRS

$425 Find Cheap Flights from Washington, D.C. to Trieste

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Washington, D.C. to Trieste departing on 7/1. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Trieste

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Trieste, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Trieste, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$919
TAP AIR PORTUGAL
Mon 8/10Wed 8/26
IAD - TRS • 2 stops
Cheapest one-way
$425
Multiple Airlines
Wed 7/1
IAD - TRS • 2 stops
Top airlines
TAP AIR PORTUGAL
Cheapest • from $919 (round-trip)
ITA Airways
Best reviews • 6.7 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Washington, D.C. and Trieste. You'll need at least 1 connection.
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Trieste!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Washington, D.C. to Trieste (IAD-TRS)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Washington, D.C. to Trieste that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Washington, D.C. to Trieste

Mon, Aug 10 - Wed, Aug 26
TAP AIR PORTUGAL Logo
10:35 pm - 10:55 pm
IAD
-
TRS
18h 20m
2 stops
TAP AIR PORTUGAL Logo
11:15 am - 3:10 pm
TRS
-
IAD
33h 55m
2 stops
$919TAP AIR PORTUGAL
Tue, May 12 - Tue, May 26
Multiple Airlines Logo
9:55 am - 10:35 pm
IAD
-
TRS
30h 40m
3 stops
Multiple Airlines Logo
1:30 pm - 3:10 pm
TRS
-
IAD
31h 40m
2 stops
$933Multiple Airlines
Fri, Apr 24 - Fri, May 1
ITA Airways Logo
4:30 pm - 2:30 pm
IAD
-
TRS
16h 00m
1 stop
ITA Airways Logo
6:35 am - 2:30 pm
TRS
-
IAD
13h 55m
1 stop
$934ITA Airways
Sun, Aug 9 - Fri, Aug 28
Lufthansa Logo
5:55 pm - 1:45 pm
IAD
-
TRS
13h 50m
1 stop
Lufthansa Logo
6:10 am - 1:35 pm
TRS
-
IAD
13h 25m
1 stop
$960Lufthansa
Tue, Aug 11 - Thu, Aug 27
TAP AIR PORTUGAL Logo
10:35 pm - 10:55 pm
IAD
-
TRS
18h 20m
2 stops
TAP AIR PORTUGAL Logo
6:35 am - 8:35 pm
TRS
-
IAD
20h 00m
2 stops
$964TAP AIR PORTUGAL
Fri, Apr 17 - Tue, Apr 21
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
$967ITA Airways
Sun, Aug 9 - Tue, Aug 25
TAP AIR PORTUGAL Logo
10:35 pm - 6:30 pm
IAD
-
TRS
37h 55m
2 stops
TAP AIR PORTUGAL Logo
6:35 am - 8:35 pm
TRS
-
IAD
20h 00m
2 stops
$968TAP AIR PORTUGAL
Sun, Aug 9 - Thu, Aug 27
Lufthansa Logo
3:25 pm - 1:45 pm
IAD
-
TRS
16h 20m
1 stop
Lufthansa Logo
2:40 pm - 11:10 am
TRS
-
IAD
26h 30m
2 stops
$976Lufthansa
Wed, Aug 12 - Mon, Aug 24
Lufthansa Logo
5:55 pm - 2:00 pm
IAD
-
TRS
14h 05m
1 stop
Lufthansa Logo
2:50 pm - 4:05 pm
TRS
-
IAD
31h 15m
1 stop
$980Lufthansa
Sun, Aug 9 - Fri, Aug 28
Lufthansa Logo
10:20 pm - 10:15 pm
IAD
-
TRS
17h 55m
2 stops
Lufthansa Logo
6:10 am - 1:35 pm
TRS
-
IAD
13h 25m
1 stop
$981Lufthansa
Booking Insights

KAYAK's insights & trends for Washington, D.C. to Trieste flights

Get data-powered insights and trends into flights from Washington, D.C. to Trieste to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from Washington, D.C. to Trieste?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from Washington, D.C. to Trieste were found on TAP AIR PORTUGAL ($919) and ITA Airways ($934).

Find deals

Good to know

Cheapest flight$425
Flight from Washington, D.C. to Trieste

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

Are your dates flexible? Find out the best times to travel from Washington, D.C. to Trieste based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Washington, D.C. to Trieste flights

  • What is the cheapest flight from Washington, D.C. Dulles Intl Airport to Trieste?

    In the last 3 days, the lowest price for a flight from Washington, D.C. Dulles Intl Airport to Trieste was $425 for a one-way ticket and $919 for a round-trip.

  • Do I need a passport to fly between Washington, D.C. and Trieste?

    Yes, you'll most likely have to show a valid passport before boarding the plane in Washington, D.C. and on arrival in Trieste.

  • Which aircraft models fly most regularly from Washington, D.C. to Trieste?

    We unfortunately don’t have that data for this specific route.

  • How does KAYAK find such low prices on flights from Washington, D.C. to Trieste?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Washington, D.C. to Trieste.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington, D.C. to Trieste?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Trieste from Washington, D.C. is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Washington, D.C. to Trieste?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Trieste with an airline and back to Washington, D.C. with another airline. Booking your flights between Washington, D.C. and TRS can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington, D.C. to Trieste?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Trieste from Washington, D.C. up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Washington, D.C. to Trieste

 
See real verified KAYAK customer reviews for airlines flying from Washington, D.C. to Trieste. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Washington, D.C. to Trieste? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
6.7
ITA AirwaysOverall score based on 1169 reviews
6.7Comfort
6.9Boarding
7.4Crew
6.2Entertainment
6.0Food
Airline reviews

They lost my checked in bag and have not helped me.

2.0 MediocreAnonymous, Feb 2026
JFK - FCO
Read more ITA Airways reviews

They lost my checked in bag and have not helped me.

First, ITA lost my bag and the baggage team showed no regard in trying to find it. Second, I had paid for priority boarding as part of a first class ticket and instead they disregarded boarding groups and we all boarded at the same time. Third, wasn't allowed to select my seat in advance even with a first class ticket. When I was assigned bulkhead, I was told I would need to pay to change my seat. Overall, very disappointing experience.

The seats needs to be spruced up , for a long flight very uncomfortable , cushions are worn out but everything else is very good , crew is great.

I guess that was fine with ITA but the Rome airport is so difficult to navigate with so many checkpoints getting new tickets from what was originally given to me

My seat was broken and ducted taped and my monitor did not work the entire time over 8 hrs sitting. And I had no books or anything with me

my flight from Rome to Boston was on a very old plane. My video and audio did not work.

Good with timing of flights. The crew was exceptionally unfriendly. I heard more than one person say this. And even with the aisle, it seemed more uncomfortable than usual. The movie selection was old and poor, but the dinner was great - the lasagna and tiramisu.

The check in process is chaotic. It says partially checked-in. Never heard of such a thing. Then lost our reserved seats when we finally checked in at the airport. The seats don’t recline. Then we had to get mew boarding passes at the connection. Last, my companion lost her baggage and up to now there’s no update. We’re already half-way through our vacation and still no news what happened to the luggage.

Wonderful! Everyone very helpful and kind. Returning flight was cancelled but rebooking was easy.

Pretty normal flight was delayed due to traffic could have missed connecting flight to Venice but crew kept us well informed so we made it

Everything you need to know for your flight from Washington, D.C. to Trieste

Information on your arrival and departure airports

Washington, D.C. (IAD)
Trieste (TRS)