IAD - TRS

$430 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
$863
Typical prices: $920-$2,203
KLM
Sun 12/9Sun 12/16
IAD - TRS • 2 stops
Cheapest one-way
$430
Typical prices: $564-$794
Multiple Airlines
Thu 12/13
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
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When to travel
September
Cheapest • 50% price drop
July
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Rome Fiumicino (FCO)
Cheapest • Avg $1,172 (round-trip)
Frankfurt am Main (FRA)
Shortest trip • 14h 15m (one-way)
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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

Wed, Dec 9 - Wed, Dec 16
KLM Logo
5:00 pm - 2:30 pmIAD  Washington, D.C. Dulles Intl-TRS Trieste Ronchi dei Legionari
15h 30m2 stops Atlanta Hartsfield-Jackson Rome Fiumicino
KLM Logo
6:35 am - 8:11 pmTRS  Trieste Ronchi dei Legionari-IAD Washington, D.C. Dulles Intl
19h 36m2 stops Rome Fiumicino Atlanta Hartsfield-Jackson
$863KLM
Wed, Dec 9 - Wed, Dec 16
Multiple Airlines Logo
10:55 pm - 2:30 pmIAD  Washington, D.C. Dulles Intl-TRS Trieste Ronchi dei Legionari
33h 35m3 stops Munich Franz Josef Strauss Naples Rome Fiumicino
Multiple Airlines Logo
3:45 pm - 8:05 pmTRS  Trieste Ronchi dei Legionari-IAD Washington, D.C. Dulles Intl
34h 20m2 stops Naples Munich Franz Josef Strauss
$883Multiple Airlines
Wed, Dec 9 - Wed, Dec 16
Multiple Airlines Logo
10:55 pm - 10:55 pmIAD  Washington, D.C. Dulles Intl-TRS Trieste Ronchi dei Legionari
18h 00m3 stops Munich Franz Josef Strauss Naples Rome Fiumicino
Multiple Airlines Logo
6:35 am - 8:05 pmTRS  Trieste Ronchi dei Legionari-IAD Washington, D.C. Dulles Intl
19h 30m3 stops Rome Fiumicino Naples Munich Franz Josef Strauss
$1,012Multiple Airlines
Wed, Dec 9 - Wed, Dec 16
Multiple Airlines Logo
1:30 pm - 5:50 pmIAD  Washington, D.C. Dulles Intl-TRS Trieste Ronchi dei Legionari
22h 20m2 stops Istanbul Tirana Rinas
Multiple Airlines Logo
11:15 am - 2:30 pmTRS  Trieste Ronchi dei Legionari-IAD Washington, D.C. Dulles Intl
33h 15m1 stop Rome Fiumicino
$1,111Multiple Airlines
Sat, Apr 24 - Fri, Apr 30
TAP AIR PORTUGAL Logo
9:35 pm - 10:55 pmIAD  Washington, D.C. Dulles Intl-TRS Trieste Ronchi dei Legionari
19h 20m2 stops Lisbon Humberto Delgado Rome Fiumicino
TAP AIR PORTUGAL Logo
6:35 am - 8:35 pmTRS  Trieste Ronchi dei Legionari-IAD Washington, D.C. Dulles Intl
20h 00m2 stops Rome Fiumicino Lisbon Humberto Delgado
$1,125TAP AIR PORTUGAL
Sat, Apr 24 - Fri, Apr 30
Multiple Airlines Logo
9:55 am - 1:40 pmIAD  Washington, D.C. Dulles Intl-TRS Trieste Ronchi dei Legionari
21h 45m3 stops Montreal Pierre Elliott Trudeau Intl Zurich Naples
Multiple Airlines Logo
6:35 am - 8:35 pmTRS  Trieste Ronchi dei Legionari-IAD Washington, D.C. Dulles Intl
20h 00m2 stops Rome Fiumicino Lisbon Humberto Delgado
$1,167Multiple Airlines
Sun, Dec 27 - Tue, Jan 5
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 - 2:30 pmTRS  Trieste Ronchi dei Legionari-IAD Washington, D.C. Dulles Intl
13h 55m1 stop Rome Fiumicino
$1,173ITA Airways
Sat, Apr 24 - Fri, Apr 30
Multiple Airlines Logo
9:55 am - 1:40 pmIAD  Washington, D.C. Dulles Intl-TRS Trieste Ronchi dei Legionari
21h 45m3 stops Montreal Pierre Elliott Trudeau Intl Zurich Naples
Multiple Airlines Logo
6:00 am - 7:00 pmTRS  Trieste Ronchi dei Legionari-IAD Washington, D.C. Dulles Intl
19h 00m3 stops Naples Barcelona-El Prat Casablanca Mohamed V
$1,182Multiple Airlines
Sun, Dec 27 - Tue, Jan 5
Multiple Airlines Logo
1:30 pm - 10:55 pmIAD  Washington, D.C. Dulles Intl-TRS Trieste Ronchi dei Legionari
27h 25m2 stops Istanbul Rome Fiumicino
Multiple Airlines Logo
6:35 am - 11:45 amTRS  Trieste Ronchi dei Legionari-IAD Washington, D.C. Dulles Intl
35h 10m2 stops Rome Fiumicino Istanbul
$1,183Multiple Airlines
Sat, Nov 14 - Wed, Nov 18
TAP AIR PORTUGAL Logo
5:25 pm - 10:55 pmIAD  Washington, D.C. Dulles Intl-TRS Trieste Ronchi dei Legionari
23h 30m2 stops Lisbon Humberto Delgado Rome Fiumicino
TAP AIR PORTUGAL Logo
3:15 pm - 3:15 pmTRS  Trieste Ronchi dei Legionari-IAD Washington, D.C. Dulles Intl
30h 00m2 stops Rome Fiumicino Lisbon Humberto Delgado
$1,185TAP AIR PORTUGAL
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 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 typically range from $920 to $2,203. The lowest price found in the past 5 days was $863, on KLM.

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

Based on deals KAYAK users found in the last 12 months, Sunday is the cheapest day of the week to fly from Washington, D.C. Dulles Intl Airport to Trieste. It’s 50% cheaper than the average day, while Tuesday is the most expensive, with prices 54% higher.

Find deals

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

Low season

November

Cheapest flight

$430
Beat the crowds with an average 81% drop in travelers.
The most popular month to fly with an average 74% increase in travelers.
One-way 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 answers about this route, including flight times, airports, airlines and booking tips.

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

    Only Economy Class is available on flights from Washington, D.C. Dulles Intl Airport to Trieste.

  • 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 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 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 $920 to $2,203, with an average of $1,438 over the past 12 months. Anything below $920 counts as a good deal.

  • Have flight prices from Washington, D.C. Dulles Intl Airport to Trieste changed much recently?

    Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $1,125 to $9,719. That means the highest observed fare was about 9x higher than the lowest one.

  • 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 higher than usual. Average one-way flight prices are about $2,058, which is 241% above the typical average for this route.

  • 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 averaging $43 for economy cars. Top options include:

    • DRIVALIA
    • NOLEGGIARE
    • SICILY BY CAR
    • Europcar
    • Budget

  • 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).

  • 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) - 82% of one-stop connections
    • Frankfurt am Main (FRA) - 18% of one-stop connections

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

    Yes. Flexible dates can save you up to 68% on flights from Washington, D.C. Dulles Intl Airport to Trieste. Sunday is the cheapest departure day at $731 round-trip on average, while Tuesday is the most expensive at $2,220, a difference of $1,489.

    Cheaper weekend fares like these are typical of routes dominated by weekday business travel.

  • 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 51m, compared with 14h 15m via Frankfurt am Main (FRA).

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

    Trieste is 5 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.

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 are flexible, aim for a Sunday departure and avoid flying on Tuesday. On this route, Sunday flights average $731, about $1,489 less than Tuesday fares (67% 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 September. Fares historically average $715 round-trip in that month - typically $1,488 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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