IAD - TRS

$309 Find Cheap Flights from Washington, D.C. to Trieste - Compare and Save

1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$697
Typical prices: $945-$2,220
KLM
Fri 9/28Sat 3/10
IAD - TRS • 2 stops
Cheapest one-way
$309
Typical prices: $560-$688
Multiple Airlines
Thu 10/11
IAD - TRS • 3 stops
Nonstop flights
Not available
There are currently no direct flights between Washington, D.C. Dulles Intl Airport and Trieste. You'll need to take a connecting flight to reach the destination.
Insights
Insights
When to travel
August
Cheapest • 53% price drop
July
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Rome Fiumicino (FCO)
Cheapest • Avg $1,262 (round-trip)
Frankfurt am Main (FRA)
Shortest trip • 14h 06m (one-way)
Insights
Insights
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Flight Deals

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

 
Discover the best prices for you by selecting your travel dates on KAYAK.

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

Fri, Oct 30 - Fri, Nov 6
KLM Logo
5:29 pm - 2:30 pmIAD  Washington, D.C. Dulles Intl-TRS Trieste Ronchi dei Legionari
16h 01m2 stops Detroit Metropolitan Wayne County Rome Fiumicino
KLM Logo
6:35 am - 11:26 pmTRS  Trieste Ronchi dei Legionari-IAD Washington, D.C. Dulles Intl
22h 51m2 stops Rome Fiumicino Minneapolis St Paul
$696KLM
Sun, Sep 27 - Wed, Mar 10
KLM Logo
5:15 pm - 6:30 pmIAD  Washington, D.C. Dulles Intl-TRS Trieste Ronchi dei Legionari
19h 15m2 stops Detroit Metropolitan Wayne County Rome Fiumicino
KLM Logo
6:35 am - 9:12 pmTRS  Trieste Ronchi dei Legionari-IAD Washington, D.C. Dulles Intl
20h 37m2 stops Rome Fiumicino Atlanta Hartsfield-Jackson
$697KLM
Sun, Sep 27 - Wed, Mar 10
ITA Airways Logo
4:30 pm - 2:30 pmIAD  Washington, D.C. Dulles Intl-TRS Trieste Ronchi dei Legionari
16h 00m1 stop Rome Fiumicino
ITA Airways Logo
7:15 pm - 2:40 pmTRS  Trieste Ronchi dei Legionari-IAD Washington, D.C. Dulles Intl
25h 25m1 stop Rome Fiumicino
$715ITA Airways
Mon, Sep 28 - Tue, Mar 9
ITA Airways Logo
4:30 pm - 6:30 pmIAD  Washington, D.C. Dulles Intl-TRS Trieste Ronchi dei Legionari
20h 00m1 stop Rome Fiumicino
ITA Airways Logo
6:35 am - 2:40 pmTRS  Trieste Ronchi dei Legionari-IAD Washington, D.C. Dulles Intl
14h 05m1 stop Rome Fiumicino
$737ITA Airways
Tue, Sep 29 - Wed, Mar 10
ITA Airways Logo
4:30 pm - 10:55 pmIAD  Washington, D.C. Dulles Intl-TRS Trieste Ronchi dei Legionari
24h 25m1 stop Rome Fiumicino
ITA Airways Logo
7:15 pm - 2:40 pmTRS  Trieste Ronchi dei Legionari-IAD Washington, D.C. Dulles Intl
25h 25m1 stop Rome Fiumicino
$741ITA Airways
Sun, Sep 27 - Mon, Mar 8
KLM Logo
5:15 pm - 2:30 pmIAD  Washington, D.C. Dulles Intl-TRS Trieste Ronchi dei Legionari
15h 15m2 stops Detroit Metropolitan Wayne County Rome Fiumicino
KLM Logo
6:35 am - 12:20 amTRS  Trieste Ronchi dei Legionari-IAD Washington, D.C. Dulles Intl
23h 45m2 stops Rome Fiumicino Atlanta Hartsfield-Jackson
$747KLM
Sun, Sep 27 - Sun, Mar 7
ITA Airways Logo
4:30 pm - 10:55 pmIAD  Washington, D.C. Dulles Intl-TRS Trieste Ronchi dei Legionari
24h 25m1 stop Rome Fiumicino
ITA Airways Logo
6:35 am - 2:40 pmTRS  Trieste Ronchi dei Legionari-IAD Washington, D.C. Dulles Intl
14h 05m1 stop Rome Fiumicino
$787ITA Airways
Sat, Sep 26 - Mon, Mar 8
ITA Airways Logo
4:30 pm - 10:55 pmIAD  Washington, D.C. Dulles Intl-TRS Trieste Ronchi dei Legionari
24h 25m1 stop Rome Fiumicino
ITA Airways Logo
3:15 pm - 2:40 pmTRS  Trieste Ronchi dei Legionari-IAD Washington, D.C. Dulles Intl
29h 25m1 stop Rome Fiumicino
$819ITA Airways
Sat, Sep 26 - Tue, Mar 9
ITA Airways Logo
4:30 pm - 2:30 pmIAD  Washington, D.C. Dulles Intl-TRS Trieste Ronchi dei Legionari
16h 00m1 stop Rome Fiumicino
ITA Airways Logo
6:35 am - 2:40 pmTRS  Trieste Ronchi dei Legionari-IAD Washington, D.C. Dulles Intl
14h 05m1 stop Rome Fiumicino
$848ITA Airways
Sat, Sep 26 - Wed, Mar 10
ITA Airways Logo
4:30 pm - 2:30 pmIAD  Washington, D.C. Dulles Intl-TRS Trieste Ronchi dei Legionari
16h 00m1 stop Rome Fiumicino
ITA Airways Logo
7:15 pm - 2:40 pmTRS  Trieste Ronchi dei Legionari-IAD Washington, D.C. Dulles Intl
25h 25m1 stop Rome Fiumicino
$853ITA Airways
Booking Insights

Price, demand and travel trends for Washington, D.C. Dulles Intl Airport to Trieste flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights from Washington, D.C. Dulles Intl Airport to Trieste with more confidence.

How much is a round-trip flight from Washington, D.C. Dulles Intl Airport to Trieste?

Round-trip flights from Washington, D.C. Dulles Intl Airport to Trieste start at $697. Prices are below average for this route right now, with typical round-trip fares ranging from $945 to $2,220. The lowest price found in the past 5 days was $697 on KLM.

What's the cheapest day of the week to fly from Washington, D.C. Dulles Intl Airport to Trieste?

Thursday is the cheapest day of the week to fly from Washington, D.C. Dulles Intl Airport to Trieste, it is 38% cheaper than the average day. Tuesday is the most expensive day with flight prices 40% higher than average. Based on deals found by KAYAK users in the last 12 months.

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Key details for Washington, D.C. Dulles Intl Airport to Trieste flights

Low season

October

Cheapest flight

$309
Best time to beat the crowds with an average 21% drop in price.
Most popular time to fly and prices are also 41% lower on average.
Flight from Washington, D.C. Dulles Intl Airport 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

Your Washington, D.C. Dulles Intl Airport to Trieste flight questions, answered

Find helpful route details based on KAYAK data, including flight times, airports, airlines and booking questions.

  • Which airports can I use when flying from Washington, D.C. Dulles Intl Airport to Trieste?

    Flights from Washington, D.C. Dulles Intl Airport to Trieste usually depart from Washington, D.C. Dulles Intl (IAD) and arrive at Trieste Ronchi dei Legionari (TRS).

  • What cabin classes can I book on flights from Washington, D.C. Dulles Intl Airport to Trieste?

    Two cabin classes are available on flights from Washington, D.C. Dulles Intl Airport to Trieste:

    • Economy Class
    • Premium Economy Class

  • Which airports do connecting flights from Washington, D.C. Dulles Intl Airport to Trieste pass through?

    Connecting flights from Washington, D.C. Dulles Intl Airport to Trieste most commonly pass through:

    • Rome Fiumicino (FCO) - 75% of one-stop connections
    • Frankfurt am Main (FRA) - 25% of one-stop connections
    Together, these airports account for 100% of one-stop bookings on this route.

  • Can I save money by using flexible dates for flights from Washington, D.C. Dulles Intl Airport to Trieste?

    Yes. Being flexible with your travel dates can save you up to 56% on the Washington, D.C. Dulles Intl Airport to Trieste route. Thursday is the cheapest departure day at $988 round-trip on average, while Tuesday is the most expensive at $2,220, a difference of $1,232. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • How long is a flight from Washington, D.C. Dulles Intl Airport to Trieste?

    A nonstop flight from Washington, D.C. Dulles Intl Airport to Trieste takes 0h 00m, covering 4,403 miles.

  • Do I need a passport to fly from Washington, D.C. Dulles Intl Airport to Trieste?

    Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

  • How are flight prices from Washington, D.C. Dulles Intl Airport to Trieste looking right now?

    One-way fares from Washington, D.C. Dulles Intl Airport to Trieste are currently lower than usual. Average one-way flight prices are about $377, which is 38% below the typical average for this route.

  • How much time can I save by choosing a different layover airport from Washington, D.C. Dulles Intl Airport to Trieste?

    Flying via Rome Fiumicino (FCO) gives the shortest average 1-stop total travel time at 12h 49m, compared with 14h 06m via Frankfurt am Main (FRA).

  • What is the time difference between Washington, D.C. Dulles Intl Airport and Trieste?

    Trieste is 6 hours ahead of Washington, D.C. Dulles Intl Airport (Central European Time vs Eastern Time). Plan for the time shift when scheduling connections or first-day activities.

  • What car rental options are available at Trieste Ronchi dei Legionari Airport (TRS)?

    Trieste Ronchi dei Legionari Airport (TRS) hosts 5 major car rental companies, with daily rates starting from around $11 for economy cars. Top options include:
    • DRIVALIA
    • NOLEGGIARE
    • SICILY BY CAR
    • Europcar
    • Budget

  • How much should I expect to pay for a Washington, D.C. Dulles Intl Airport to Trieste flight?

    Round-trip flights from Washington, D.C. Dulles Intl Airport to Trieste range from $945 to $2,220, with an average of $1,578 over the past 12 months. Anything below $945 counts as a good deal.

Your guide to booking Washington, D.C. Dulles Intl Airport to Trieste flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates can be flexible, aim for a Thursday departure instead of Tuesday. On this route, Thursday flights average $988 - about $1,232 less than Tuesday (55% savings) based on the last 12 months.
  • If you can choose when to travel, plan your Washington, D.C. Dulles Intl Airport to Trieste trip for August. Fares historically average $744 round-trip in that month - typically $1,459 less than the most expensive month, which is June (based on the last 12 months).

More options for your flight from Washington, D.C. to Trieste

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