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Cheap flights from Washington to Trieste from $553

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington to Trieste departing on 7/31. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Washington to Trieste

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
2:10 pm - 1:55 pm
SEA
-
TRS
14h 45m
1 stop
Multiple Airlines Logo
6:15 am - 6:32 pm
TRS
-
SEA
21h 17m
2 stops
$1,050Multiple Airlines
Thu, Oct 1 - Thu, Oct 15
Lufthansa Logo
2:10 pm - 10:15 pm
SEA
-
TRS
23h 05m
1 stop
Lufthansa Logo
6:15 am - 12:20 pm
TRS
-
SEA
15h 05m
1 stop
$1,053Lufthansa
Thu, Oct 1 - Thu, Oct 15
Lufthansa Logo
1:56 pm - 10:15 pm
SEA
-
TRS
23h 19m
2 stops
Lufthansa Logo
6:15 am - 6:32 pm
TRS
-
SEA
21h 17m
2 stops
$1,058Lufthansa
Thu, Oct 1 - Thu, Oct 15
KLM Logo
2:00 pm - 2:30 pm
SEA
-
TRS
15h 30m
1 stop
KLM Logo
6:35 am - 8:21 pm
TRS
-
SEA
22h 46m
2 stops
$1,118KLM
Fri, Jul 3 - Fri, Jul 10
KLM Logo
2:00 pm - 10:55 pm
SEA
-
TRS
23h 55m
1 stop
KLM Logo
3:15 pm - 3:30 pm
TRS
-
SEA
33h 15m
1 stop
$1,178KLM
Fri, Jul 3 - Fri, Jul 10
Lufthansa Logo
10:45 am - 1:55 pm
SEA
-
TRS
18h 10m
2 stops
Lufthansa Logo
6:10 am - 4:59 pm
TRS
-
SEA
19h 49m
2 stops
$1,182Lufthansa
Fri, Jul 3 - Fri, Jul 10
United Airlines Logo
11:04 pm - 10:25 am
SEA
-
TRS
26h 21m
2 stops
United Airlines Logo
6:35 am - 9:04 pm
TRS
-
SEA
23h 29m
2 stops
$1,194United Airlines
Sun, Oct 18 - Thu, Oct 22
United Airlines Logo
11:04 pm - 10:25 am
SEA
-
TRS
26h 21m
2 stops
United Airlines Logo
6:35 am - 9:04 pm
TRS
-
SEA
23h 29m
2 stops
$1,195United Airlines
Sun, Oct 18 - Thu, Oct 22
Lufthansa Logo
2:10 pm - 1:45 pm
SEA
-
TRS
14h 35m
1 stop
Lufthansa Logo
6:20 am - 2:22 pm
TRS
-
SEA
17h 02m
2 stops
$1,204Lufthansa
Tue, Jun 30 - Tue, Jul 7
Lufthansa Logo
2:10 pm - 1:45 pm
SEA
-
TRS
14h 35m
1 stop
Lufthansa Logo
6:20 am - 12:20 pm
TRS
-
SEA
15h 00m
1 stop
$1,220Lufthansa
Tue, Jun 30 - Tue, Jul 7

KLM flights from State of Washington to Trieste

Our best KLM deals on State of Washington to Trieste flight tickets
KLM
Jul 3
SEA2:00 pmSeattle/Tacoma Intl
15h 30m
1 stop
TRS2:30 pmTrieste Ronchi dei Legionari
Jul 10
TRS6:35 amTrieste Ronchi dei Legionari
22h 46m
2 stops
SEA8:21 pmSeattle/Tacoma Intl
$1,118
KLM
Jul 3
SEA2:00 pmSeattle/Tacoma Intl
23h 55m
1 stop
TRS10:55 pmTrieste Ronchi dei Legionari
Jul 10
TRS3:15 pmTrieste Ronchi dei Legionari
33h 15m
1 stop
SEA3:30 pmSeattle/Tacoma Intl
$1,178

Lufthansa flights from State of Washington to Trieste

Our best Lufthansa deals on State of Washington to Trieste flight tickets
Lufthansa
Oct 1
SEA2:10 pmSeattle/Tacoma Intl
23h 05m
1 stop
TRS10:15 pmTrieste Ronchi dei Legionari
Oct 15
TRS6:15 amTrieste Ronchi dei Legionari
15h 05m
1 stop
SEA12:20 pmSeattle/Tacoma Intl
$1,053
Lufthansa
Oct 1
SEA1:56 pmSeattle/Tacoma Intl
23h 19m
2 stops
TRS10:15 pmTrieste Ronchi dei Legionari
Oct 15
TRS6:15 amTrieste Ronchi dei Legionari
21h 17m
2 stops
SEA6:32 pmSeattle/Tacoma Intl
$1,058
Lufthansa
Jul 3
SEA10:45 amSeattle/Tacoma Intl
18h 10m
2 stops
TRS1:55 pmTrieste Ronchi dei Legionari
Jul 10
TRS6:10 amTrieste Ronchi dei Legionari
19h 49m
2 stops
SEA4:59 pmSeattle/Tacoma Intl
$1,182

momondo Fare Finder

 
Customize your flight search to find flights from State of Washington to Trieste that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated May 19, 2026.
Use the filters below to find and compare flights from Washington to Trieste that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleTrieste

SEA - TRS

SEATRS

Seattle/Tacoma Intl

Thu 10/1

2:10 pm-1:55 pm

1 stop14h 45m

Trieste Ronchi dei Legionari

Thu 10/15

6:15 am-6:32 pm

2 stops21h 17m

$1,050

SeattleTrieste

SEA - TRS

SEATRS

Seattle/Tacoma Intl

Thu 10/1

2:10 pm-10:15 pm

1 stop23h 05m

Trieste Ronchi dei Legionari

Thu 10/15

6:15 am-12:20 pm

1 stop15h 05m

$1,053

SeattleTrieste

SEA - TRS

SEATRS

Seattle/Tacoma Intl

Thu 10/1

1:56 pm-10:15 pm

2 stops23h 19m

Trieste Ronchi dei Legionari

Thu 10/15

6:15 am-6:32 pm

2 stops21h 17m

$1,058

SeattleTrieste

SEA - TRS

SEATRS

Seattle/Tacoma Intl

Fri 7/3

2:00 pm-2:30 pm

1 stop15h 30m

Trieste Ronchi dei Legionari

Fri 7/10

6:35 am-8:21 pm

2 stops22h 46m

$1,118

SeattleTrieste

SEA - TRS

SEATRS

Seattle/Tacoma Intl

Fri 7/3

2:00 pm-10:55 pm

1 stop23h 55m

Trieste Ronchi dei Legionari

Fri 7/10

3:15 pm-3:30 pm

1 stop33h 15m

$1,178

SeattleTrieste

SEA - TRS

SEATRS

Seattle/Tacoma Intl

Fri 7/3

10:45 am-1:55 pm

2 stops18h 10m

Trieste Ronchi dei Legionari

Fri 7/10

6:10 am-4:59 pm

2 stops19h 49m

$1,182

SeattleTrieste

SEA - TRS

SEATRS

Seattle/Tacoma Intl

Sun 10/18

11:04 pm-10:25 am

2 stops26h 21m

Trieste Ronchi dei Legionari

Thu 10/22

6:35 am-9:04 pm

2 stops23h 29m

$1,194

SeattleTrieste

SEA - TRS

SEATRS

Seattle/Tacoma Intl

Sun 10/18

11:04 pm-10:25 am

2 stops26h 21m

Trieste Ronchi dei Legionari

Thu 10/22

6:35 am-9:04 pm

2 stops23h 29m

$1,195

SeattleTrieste

SEA - TRS

SEATRS

Seattle/Tacoma Intl

Tue 6/30

2:10 pm-1:45 pm

1 stop14h 35m

Trieste Ronchi dei Legionari

Tue 7/7

6:20 am-2:22 pm

2 stops17h 02m

$1,204
Quickest round-trip

SeattleTrieste

SEA - TRS

SEATRS

Seattle/Tacoma Intl

Tue 6/30

2:10 pm-1:45 pm

1 stop14h 35m

Trieste Ronchi dei Legionari

Tue 7/7

6:20 am-12:20 pm

1 stop15h 00m

$1,220

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 15 resultsSorted by cheapest first
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See travel insights to Trieste from

How to get the cheapest flight ticket from State of Washington to Trieste

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest airline that flies from Washington to Trieste Ronchi dei Legionari?

Lufthansa and KLM are the most popular carriers operating from Washington to Trieste Ronchi dei Legionari

What airlines fly to Trieste?

Condor, British Airways and Delta are the top three most popular airlines that fly to Trieste from State of Washington according to our data. Condor is the first choice among our users, with 41% of people opting to fly with this airline when traveling to Trieste. Keep in mind that there are 8 different airlines that fly to Trieste on a routine basis, so you have a few additional options to choose from.

Cheap State of Washington to Trieste flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from State of Washington to Trieste

Fastest flight time

17h 15m

Direct flights

None
The fastest flight from State of Washington to Trieste takes 17h 15m
There are no direct flights from State of Washington to Trieste. There are no popular flight routes from State of Washington to Trieste.
Search flight deals

Frequently asked questions about flying from Washington to Trieste

  • When did momondo last update prices for flights from Washington to Trieste Ronchi dei Legionari Airport?

    Prices for flights from Washington to Trieste Ronchi dei Legionari Airport are updated daily.

  • How old do you have to be to fly from Washington to Trieste Ronchi dei Legionari Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Washington to Trieste Ronchi dei Legionari Airport.

  • What documentation or ID do you need to fly to Trieste Ronchi dei Legionari Airport?

    The travel and health documents required for your trip to Trieste Ronchi dei Legionari Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Trieste Ronchi dei Legionari Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Traveling to a place near Trieste?

Book flights to Trieste if you plan to visit one of these locations
Udine
Grado

Why use momondo?

Why should I use momondo to find a flight deal from Washington to Trieste?

Finding the right flight to Trieste from Washington is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Trieste quick and easy, saving you time and money.

Can I find flights from Washington to Trieste with flexible booking policies on momondo?

Flights from Washington to Trieste with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Washington to Trieste?

momondo helps you find the best flight between Washington and Trieste by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Washington to Trieste right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Washington to Trieste flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

An easier way to manage your Trieste trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
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Find better results for your trip to Italy

Fly your favorite airline to Trieste

Airlines are sorted and displayed according to clicks in the past 7 days on momondo
Condor
British Airways
Delta
Lufthansa
Turkish Airlines
United Airlines
Scandinavian Airlines
Air France