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Trieste

$367+ Cheap flights from Washington to Trieste (TRS)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/3. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — TRS
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
1 adult, Economy
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Cheap flight deals from Washington to Trieste

Keep the following information in mind while searching for Washington to Trieste flight deals. Data was last updated September 16, 2025.

Round-trip from

$669
(Billigflug)

One-way from

$367
(Kiwi.com)
From Washington to Trieste Ronchi dei Legionari
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One-way flight from Washington to Trieste Ronchi dei Legionari
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Find flight deals from Washington to Trieste

Cheapest flights from Washington to Trieste
Explore the most affordable flight options available from Washington to Trieste. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 16, 2025.

This Billigflug deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Billigflug is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/303:00 pmSEA - TRS
1 stop23h 30mMultiple Airlines
Thu 11/66:25 amTRS - SEA
2 stops21h 51mMultiple Airlines
Deal found 9/15$669
This Billigflug deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Billigflug is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/303:00 pmSEA - TRS
1 stop15h 05mLufthansa
Thu 11/66:25 amTRS - SEA
1 stop14h 45mLufthansa
Deal found 9/15$672
This Lufthansa deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/197:30 amPDX - TRS
2 stops21h 35mLufthansa
Sun 11/233:00 pmTRS - PDX
2 stops42h 26mLufthansa
Deal found 9/14$706
This Lufthansa deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/197:00 amSEA - TRS
2 stops22h 05mLufthansa
Sun 11/233:00 pmTRS - SEA
1 stop30h 10mLufthansa
Deal found 9/14$711
This flugladen.de deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure flugladen.de is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/307:19 amSEA - TRS
2 stops23h 11mKLM
Thu 11/66:35 amTRS - SEA
2 stops24h 28mKLM
Deal found 9/15$745
This Gotogate deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/1910:00 amSEA - TRS
2 stops27h 35mMultiple Airlines
Sat 10/252:45 pmTRS - SEA
2 stops37h 31mMultiple Airlines
Deal found 9/14$838
This FlightHub deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/36:50 pmSEA - TRS
2 stops18h 35mLufthansa
Mon 10/132:45 pmTRS - SEA
1 stop30h 10mLufthansa
Deal found 9/15$866
This Gotogate deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/36:50 pmSEA - TRS
2 stops18h 35mMultiple Airlines
Mon 10/132:45 pmTRS - SEA
2 stops36h 51mMultiple Airlines
Deal found 9/15$873
This United Airlines deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1911:59 pmPDX - TRS
2 stops25h 26mUnited Airlines
Sun 11/236:35 amTRS - PDX
3 stops38h 38mUnited Airlines
Deal found 9/14$1,893
This Arangrant deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Arangrant is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/243:52 pmPDX - TRS
2 stops37h 13mLufthansa
Thu 1/86:25 amTRS - PDX
2 stops21h 31mLufthansa
Deal found 9/15$13,066
This Justfly.com deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/237:30 amPDX - TRS
2 stops21h 30mLufthansa
Thu 1/86:25 amTRS - PDX
2 stops21h 31mLufthansa
Deal found 9/15$13,099
This KAYAK deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/217:30 amPDX - TRS
2 stops29h 55mLufthansa
Tue 1/66:25 amTRS - PDX
2 stops21h 31mLufthansa
Deal found 9/15$13,445

Cheapflights Fare Finder

 
Customize your flight search to find flights from 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, Cheapflights users made 2,558,603 searches. Data last updated September 16, 2025.
Use the filters below to find and compare flights from Washington to Trieste that are best for you.

Fly from

Washington

Fly to

Trieste

Route

Depart

Return

Price

SeattleTrieste

SEA - TRS

SEATRS

Seattle/Tacoma Intl

Thu 10/30

3:00 pm-10:30 pm

1 stop23h 30m

Trieste Ronchi dei Legionari

Thu 11/6

6:25 am-7:16 pm

2 stops21h 51m

$669

SeattleTrieste

SEA - TRS

SEATRS

Seattle/Tacoma Intl

Thu 10/30

3:00 pm-2:05 pm

1 stop15h 05m

Trieste Ronchi dei Legionari

Thu 11/6

6:25 am-12:10 pm

1 stop14h 45m

$672

PortlandTrieste

PDX - TRS

PDXTRS

Portland

Wed 11/19

7:30 am-2:05 pm

2 stops21h 35m

Trieste Ronchi dei Legionari

Sun 11/23

3:00 pm-12:26 am

2 stops42h 26m

$706

SeattleTrieste

SEA - TRS

SEATRS

Seattle/Tacoma Intl

Wed 11/19

7:00 am-2:05 pm

2 stops22h 05m

Trieste Ronchi dei Legionari

Sun 11/23

3:00 pm-12:10 pm

1 stop30h 10m

$711

SeattleTrieste

SEA - TRS

SEATRS

Seattle/Tacoma Intl

Thu 10/30

7:19 am-2:30 pm

2 stops23h 11m

Trieste Ronchi dei Legionari

Thu 11/6

6:35 am-10:03 pm

2 stops24h 28m

$745

SeattleTrieste

SEA - TRS

SEATRS

Seattle/Tacoma Intl

Sun 10/19

10:00 am-10:35 pm

2 stops27h 35m

Trieste Ronchi dei Legionari

Sat 10/25

2:45 pm-7:16 pm

2 stops37h 31m

$838

SeattleTrieste

SEA - TRS

SEATRS

Seattle/Tacoma Intl

Fri 10/3

6:50 pm-10:25 pm

2 stops18h 35m

Trieste Ronchi dei Legionari

Mon 10/13

2:45 pm-11:55 am

1 stop30h 10m

$866

SeattleTrieste

SEA - TRS

SEATRS

Seattle/Tacoma Intl

Fri 10/3

6:50 pm-10:25 pm

2 stops18h 35m

Trieste Ronchi dei Legionari

Mon 10/13

2:45 pm-6:36 pm

2 stops36h 51m

$873

PortlandTrieste

PDX - TRS

PDXTRS

Portland

Wed 11/19

11:59 pm-10:25 am

2 stops25h 26m

Trieste Ronchi dei Legionari

Sun 11/23

6:35 am-12:13 pm

3 stops38h 38m

$1,893

PortlandTrieste

PDX - TRS

PDXTRS

Portland

Wed 12/24

3:52 pm-2:05 pm

2 stops37h 13m

Trieste Ronchi dei Legionari

Thu 1/8

6:25 am-6:56 pm

2 stops21h 31m

$13,066

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 17 results
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Best time to book a flight from Washington to Trieste

Have a flexible travel schedule? Discover the best time to fly to Trieste from Washington with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Washington to Trieste
No data available for this route at this time. Please check back soon.

Related info for your journey

Find useful and relevant information for your journey from Washington to Trieste. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Trieste from Washington?

    If you book a flight to Trieste from Washington, you will be flying to Ronchi dei Legionari, which is the city’s only airport. Trieste Ronchi dei Legionari (TRS) is located 18.2 mi from the center of Trieste.

  • How long is the flight from State of Washington to Trieste?

    Departing from State of Washington to Trieste will take you 15h 05m. State of Washington and Trieste are separated by a distance of 5456 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • Can I find deals for flights from Washington to Trieste that include hotel bookings?

    Yes. In addition to deals on Washington to Trieste flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Washington to Trieste?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington to Trieste.

  • Can I find deals for business class flights from Washington to Trieste?

    Yes. Cheapflights offers flight deals from Washington to Trieste by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

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