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Cheap flights from Washington to Trieste from $359

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 8/31. 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
1 adult, Economy, 0 bags

Find the cheapest flights from Washington to Trieste

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
3:40 pm - 10:55 pm
SEA
-
TRS
22h 15m
3 stops
Multiple Airlines Logo
6:35 am - 5:55 pm
TRS
-
SEA
20h 20m
3 stops
$901Multiple Airlines
Sun, Sep 20 - Mon, Oct 5
Multiple Airlines Logo
5:40 pm - 10:15 pm
SEA
-
TRS
19h 35m
1 stop
Multiple Airlines Logo
6:10 am - 4:10 pm
TRS
-
SEA
19h 00m
1 stop
$959Multiple Airlines
Sun, Sep 20 - Mon, Oct 5
Multiple Airlines Logo
10:35 am - 10:15 pm
PDX
-
TRS
26h 40m
2 stops
Multiple Airlines Logo
6:10 am - 7:11 pm
TRS
-
PDX
22h 01m
2 stops
$1,035Multiple Airlines
Tue, Sep 1 - Wed, Sep 9
Multiple Airlines Logo
9:25 pm - 10:25 pm
SEA
-
TRS
40h 00m
2 stops
Multiple Airlines Logo
6:10 am - 4:10 pm
TRS
-
SEA
19h 00m
1 stop
$1,040Multiple Airlines
Sun, Sep 20 - Mon, Oct 5
Multiple Airlines Logo
7:00 am - 10:15 pm
SEA
-
TRS
30h 15m
2 stops
Multiple Airlines Logo
2:50 pm - 9:04 pm
TRS
-
SEA
39h 14m
2 stops
$1,052Multiple Airlines
Sun, Sep 20 - Mon, Oct 5
Multiple Airlines Logo
5:30 pm - 6:30 pm
SEA
-
TRS
16h 00m
1 stop
Multiple Airlines Logo
7:15 pm - 5:50 pm
TRS
-
SEA
31h 35m
1 stop
$1,096Multiple Airlines
Mon, Jul 20 - Mon, Aug 3
United Airlines Logo
11:16 pm - 10:25 am
SEA
-
TRS
26h 09m
2 stops
United Airlines Logo
6:35 am - 8:59 pm
TRS
-
SEA
23h 24m
2 stops
$1,213United Airlines
Sun, Nov 1 - Thu, Nov 5
United Airlines Logo
8:33 am - 10:25 am
SEA
-
TRS
40h 52m
3 stops
United Airlines Logo
6:35 am - 9:23 pm
TRS
-
SEA
23h 48m
2 stops
$1,232United Airlines
Sun, Nov 1 - Thu, Nov 5
Lufthansa Logo
10:45 am - 1:55 pm
SEA
-
TRS
18h 10m
2 stops
Lufthansa Logo
6:10 am - 8:46 pm
TRS
-
SEA
23h 36m
2 stops
$1,240Lufthansa
Mon, Jul 20 - Mon, Aug 3
United Airlines Logo
8:46 am - 10:25 am
PDX
-
TRS
16h 39m
2 stops
United Airlines Logo
6:35 am - 7:07 pm
TRS
-
PDX
21h 32m
2 stops
$1,254United Airlines
Mon, Dec 14 - Mon, Dec 21

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Lufthansa flights from State of Washington to Trieste

Our best Lufthansa deals on State of Washington to Trieste flight tickets
Lufthansa
Jul 20
SEA10:45 amSeattle/Tacoma Intl
18h 10m
2 stops
TRS1:55 pmTrieste Ronchi dei Legionari
Aug 3
TRS6:10 amTrieste Ronchi dei Legionari
23h 36m
2 stops
SEA8:46 pmSeattle/Tacoma Intl
$1,240
Lufthansa
Jul 20
SEA2:10 pmSeattle/Tacoma Intl
14h 45m
1 stop
TRS1:55 pmTrieste Ronchi dei Legionari
Aug 3
TRS6:10 amTrieste Ronchi dei Legionari
23h 36m
2 stops
SEA8:46 pmSeattle/Tacoma Intl
$1,246
Lufthansa
Jul 20
SEA10:45 amSeattle/Tacoma Intl
18h 10m
2 stops
TRS1:55 pmTrieste Ronchi dei Legionari
Aug 3
TRS2:50 pmTrieste Ronchi dei Legionari
30h 05m
1 stop
SEA11:55 amSeattle/Tacoma Intl
$1,276

United Airlines flights from State of Washington to Trieste

Our best United Airlines deals on State of Washington to Trieste flight tickets
United Airlines
Nov 1
SEA11:16 pmSeattle/Tacoma Intl
26h 09m
2 stops
TRS10:25 amTrieste Ronchi dei Legionari
Nov 5
TRS6:35 amTrieste Ronchi dei Legionari
23h 24m
2 stops
SEA8:59 pmSeattle/Tacoma Intl
$1,213
United Airlines
Nov 1
SEA8:33 amSeattle/Tacoma Intl
40h 52m
3 stops
TRS10:25 amTrieste Ronchi dei Legionari
Nov 5
TRS6:35 amTrieste Ronchi dei Legionari
23h 48m
2 stops
SEA9:23 pmSeattle/Tacoma Intl
$1,232
United Airlines
Dec 14
PDX8:46 amPortland
16h 39m
2 stops
TRS10:25 amTrieste Ronchi dei Legionari
Dec 21
TRS6:35 amTrieste Ronchi dei Legionari
21h 32m
2 stops
PDX7:07 pmPortland
$1,254

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 July 10, 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

Sun 9/20

3:40 pm-10:55 pm

3 stops22h 15m

Trieste Ronchi dei Legionari

Mon 10/5

6:35 am-5:55 pm

3 stops20h 20m

$901

SeattleTrieste

SEA - TRS

SEATRS

Seattle/Tacoma Intl

Sun 9/20

5:40 pm-10:15 pm

1 stop19h 35m

Trieste Ronchi dei Legionari

Mon 10/5

6:10 am-4:10 pm

1 stop19h 00m

$959

PortlandTrieste

PDX - TRS

PDXTRS

Portland

Tue 9/1

10:35 am-10:15 pm

2 stops26h 40m

Trieste Ronchi dei Legionari

Wed 9/9

6:10 am-7:11 pm

2 stops22h 01m

$1,035

SeattleTrieste

SEA - TRS

SEATRS

Seattle/Tacoma Intl

Sun 9/20

9:25 pm-10:25 pm

2 stops40h 00m

Trieste Ronchi dei Legionari

Mon 10/5

6:10 am-4:10 pm

1 stop19h 00m

$1,040

SeattleTrieste

SEA - TRS

SEATRS

Seattle/Tacoma Intl

Sun 9/20

7:00 am-10:15 pm

2 stops30h 15m

Trieste Ronchi dei Legionari

Mon 10/5

2:50 pm-9:04 pm

2 stops39h 14m

$1,052

SeattleTrieste

SEA - TRS

SEATRS

Seattle/Tacoma Intl

Mon 7/20

5:30 pm-6:30 pm

1 stop16h 00m

Trieste Ronchi dei Legionari

Mon 8/3

7:15 pm-5:50 pm

1 stop31h 35m

$1,096

SeattleTrieste

SEA - TRS

SEATRS

Seattle/Tacoma Intl

Sun 11/1

11:16 pm-10:25 am

2 stops26h 09m

Trieste Ronchi dei Legionari

Thu 11/5

6:35 am-8:59 pm

2 stops23h 24m

$1,213

SeattleTrieste

SEA - TRS

SEATRS

Seattle/Tacoma Intl

Sun 11/1

8:33 am-10:25 am

3 stops40h 52m

Trieste Ronchi dei Legionari

Thu 11/5

6:35 am-9:23 pm

2 stops23h 48m

$1,232

SeattleTrieste

SEA - TRS

SEATRS

Seattle/Tacoma Intl

Mon 7/20

10:45 am-1:55 pm

2 stops18h 10m

Trieste Ronchi dei Legionari

Mon 8/3

6:10 am-8:46 pm

2 stops23h 36m

$1,240
Quickest round-trip

PortlandTrieste

PDX - TRS

PDXTRS

Portland

Mon 12/14

8:46 am-10:25 am

2 stops16h 39m

Trieste Ronchi dei Legionari

Mon 12/21

6:35 am-7:07 pm

2 stops21h 32m

$1,254

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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2

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 is the most popular carrier operating from Washington to Trieste Ronchi dei Legionari

What airlines fly to Trieste?

Condor, British Airways and Lufthansa 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 50% of people opting to fly with this airline when traveling to Trieste. Keep in mind that there are 7 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

16h 00m

Direct flights

None
The fastest flight from State of Washington to Trieste takes 16h 00m
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

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Fly your favorite airline to Trieste

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