IAD - TRS

$698 Find Cheap Flights from Washington, D.C. to Trieste

This is the cheapest round-trip 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 1/20. 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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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

Tue, Jan 20 - Thu, Feb 5
TAP AIR PORTUGAL Logo
5:30 pm - 6:30 pmIAD-TRS
19h 00m2 stops
TAP AIR PORTUGAL Logo
3:15 pm - 9:00 pmTRS-IAD
35h 45m2 stops
$698TAP AIR PORTUGAL
Find Deal
Tue, Jan 20 - Thu, Feb 5
Multiple Airlines Logo
5:30 pm - 2:30 pmIAD-TRS
15h 00m2 stops
Multiple Airlines Logo
11:15 am - 9:00 pmTRS-IAD
39h 45m2 stops
$702Multiple Airlines
Find Deal
Mon, Dec 15 - Mon, Dec 22
Multiple Airlines Logo
7:40 pm - 6:30 pmIAD-TRS
16h 50m2 stops
Multiple Airlines Logo
7:15 pm - 6:30 pmTRS-IAD
29h 15m2 stops
$799Multiple Airlines
Find Deal
Tue, Jan 20 - Thu, Feb 5
Multiple Airlines Logo
4:30 pm - 10:40 pmIAD-TRS
24h 10m2 stops
Multiple Airlines Logo
6:15 am - 3:50 pmTRS-IAD
15h 35m1 stop
$820Multiple Airlines
Find Deal
Tue, Jan 20 - Thu, Feb 5
Lufthansa Logo
6:00 pm - 10:40 pmIAD-TRS
22h 40m1 stop
Lufthansa Logo
6:15 am - 3:50 pmTRS-IAD
15h 35m1 stop
$850Lufthansa
Find Deal
Thu, Feb 19 - Sun, Mar 1
Turkish Airlines Logo
1:30 pm - 6:30 pmIAD-TRS
23h 00m2 stops
Turkish Airlines Logo
3:15 pm - 7:20 pmTRS-IAD
34h 05m2 stops
$904Turkish Airlines
Find Deal
Thu, Feb 19 - Sun, Mar 1
Lufthansa Logo
6:00 pm - 10:30 pmIAD-TRS
22h 30m1 stop
Lufthansa Logo
3:00 pm - 3:50 pmTRS-IAD
30h 50m1 stop
$1,041Lufthansa
Find Deal
Thu, Apr 2 - Mon, Apr 6
ITA Airways Logo
12:43 pm - 2:30 pmIAD-TRS
19h 47m2 stops
ITA Airways Logo
7:15 pm - 2:40 pmTRS-IAD
25h 25m1 stop
$1,090ITA Airways
Find Deal
Thu, Apr 2 - Mon, Apr 6
ITA Airways Logo
12:43 pm - 10:25 amIAD-TRS
15h 42m2 stops
ITA Airways Logo
7:15 pm - 2:40 pmTRS-IAD
25h 25m1 stop
$1,091ITA Airways
Find Deal
Fri, Apr 3 - Wed, Apr 8
United Airlines Logo
5:10 pm - 10:25 amIAD-TRS
11h 15m1 stop
United Airlines Logo
6:35 am - 2:25 pmTRS-IAD
13h 50m1 stop
$1,896United Airlines
Find Deal

Everything you should know

Top airlines
TAP AIR PORTUGAL
Cheapest • from $698 (round-trip)
ITA Airways
Best reviews • 6.7 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Cheapest round-trip
$698
TAP AIR PORTUGAL
Tue 1/20Thu 2/5
IAD - TRS • 2 stops
Cheapest one-way
Multiple Airlines
Sun 11/2
IAD - TRS • multi-stop
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Trieste!
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 ($698) and Lufthansa ($850).

Which airlines fly non-stop between Washington, D.C. Dulles Intl Airport and Trieste?

Airline and price data is aggregated from results in KAYAK’s search results from the last 2 weeks for round-trip flights from Washington, D.C. Dulles Intl Airport to Trieste.

There is just one airline that flies from Washington, D.C. Dulles Intl Airport to Trieste direct and that is ITA Airways. The best round-trip deal found from ITA Airways for the route is $664.

Good to know

Cheapest flight$698
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 $698 for a round-trip ticket.

  • 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 1079 reviews
6.0Food
6.7Comfort
7.3Crew
6.2Entertainment
6.9Boarding
Airline reviews

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

10.0 ExcellentJames, Oct 2025AHO - FCO
Read more ITA Airways reviews

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

Flight was on time and pretty standard. No Hiccups. I have no complaints, which is a lot to say about a 12 hour flight.

-The seats could be roomier -The entertainment in English could be more current! The moves were very old!!! -They served too many carbs! What happened to fruit and yogurt!!!!

We upgraded to premium economy and it made a difference in a 12 hr flight. I didn’t like that we had to deplane in the tarmac with our carryon luggage. Other than that, it was ok.

Everything was much better than I had expected, since I hadn’t heard of your airline before. I hope to take advantage of your excellent service again.

Staff were nice, we left on time and arrived early, food was good. Unfortunately, they lost one of our bags and have been unable to find it. So we are in Italy for a week for my husband‘s birthday and he does not have any of his clothing.

They gave us sandwiches as a meal twice. Snacks mid flight with cookies and a tuna panini. Then just the same tuna panini for dinner. That was it.

Top notch re cleanliness, comfort, operational. Attendants attentive, cheerful, courteous and professional. An unusually high-grade experience all around.

The staff was very good, the only thing was the air conditioning wasn't working during the boarding process so it was very hot inside the plane until we got airborne. The food wasn't great, the chicken was dry and hard to cut, the ravioli was ok and the little pizza pocket thing was pretty bad. Other than that is was a good flight all around

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

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