HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Trieste

$714+ Cheap flights from Seattle (SEA) 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 7/6. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — TRS
Apr 21 — Apr 281
Tue 4/21
Tue 4/28
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Seattle to Trieste with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Seattle to Trieste

Cheapest flights from Seattle to Trieste
Explore the most affordable flight options available from Seattle to Trieste. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 22, 2026.

This KAYAK deal was found by Cheapflights users on 3/17. 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 8/93:00 pm
SEA
-
TRS
2 stops37h 55m
Lufthansa
Wed 8/196:10 am
TRS
-
SEA
1 stop14h 45m
Lufthansa
Deal found 3/17$909
This KAYAK deal was found by Cheapflights users on 3/17. 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.
Tue 8/117:00 am
SEA
-
TRS
2 stops21h 45m
Lufthansa
Thu 8/206:15 am
TRS
-
SEA
1 stop14h 40m
Lufthansa
Deal found 3/17$913
This KAYAK deal was found by Cheapflights users on 3/17. 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.
Wed 8/122:10 pm
SEA
-
TRS
1 stop14h 50m
Lufthansa
Tue 8/252:45 pm
TRS
-
SEA
2 stops37h 14m
Lufthansa
Deal found 3/17$926
This KAYAK deal was found by Cheapflights users on 3/17. 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.
Sat 8/81:00 pm
SEA
-
TRS
2 stops39h 45m
Lufthansa
Thu 8/206:15 am
TRS
-
SEA
2 stops17h 07m
Lufthansa
Deal found 3/17$927
This KAYAK deal was found by Cheapflights users on 3/17. 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 8/93:00 pm
SEA
-
TRS
2 stops37h 55m
Lufthansa
Tue 8/252:45 pm
TRS
-
SEA
2 stops32h 37m
Lufthansa
Deal found 3/17$928
This KAYAK deal was found by Cheapflights users on 3/17. 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.
Wed 8/126:50 pm
SEA
-
TRS
2 stops18h 35m
Lufthansa
Fri 8/216:10 am
TRS
-
SEA
1 stop14h 45m
Lufthansa
Deal found 3/17$929
This KAYAK deal was found by Cheapflights users on 3/17. 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.
Tue 8/117:00 am
SEA
-
TRS
2 stops21h 45m
Lufthansa
Tue 8/182:45 pm
TRS
-
SEA
1 stop30h 10m
Lufthansa
Deal found 3/17$933
This KAYAK deal was found by Cheapflights users on 3/17. 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.
Wed 8/122:10 pm
SEA
-
TRS
1 stop14h 50m
Lufthansa
Mon 8/242:50 pm
TRS
-
SEA
2 stops37h 09m
Lufthansa
Deal found 3/17$939
This KAYAK deal was found by Cheapflights users on 3/17. 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 8/93:00 pm
SEA
-
TRS
2 stops37h 55m
Lufthansa
Fri 8/216:10 am
TRS
-
SEA
2 stops19h 49m
Lufthansa
Deal found 3/17$943
This KAYAK deal was found by Cheapflights users on 3/17. 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.
Sat 8/87:40 am
SEA
-
TRS
2 stops45h 05m
Lufthansa
Tue 8/182:45 pm
TRS
-
SEA
1 stop30h 10m
Lufthansa
Deal found 3/17$947
This Expedia deal was found by Cheapflights users on 3/21. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/56:05 pm
SEA
-
TRS
1 stop19h 10m
Multiple Airlines
Tue 5/126:20 am
TRS
-
SEA
2 stops22h 26m
Multiple Airlines
Deal found 3/21$950
This KAYAK deal was found by Cheapflights users on 3/17. 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 8/93:00 pm
SEA
-
TRS
2 stops37h 55m
Lufthansa
Tue 8/186:20 am
TRS
-
SEA
2 stops43h 39m
Lufthansa
Deal found 3/17$953

Find flight deals from Seattle to Trieste

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Trieste (TRS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated March 22, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$909
(KAYAK)

One-way from

$714
(United Airlines)
Provider with most accurate pricing for Seattle/Tacoma Intl-Trieste Ronchi dei Legionari flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Trieste Ronchi dei Legionari flights.
Search Deals
From Seattle/Tacoma Intl to Trieste Ronchi dei Legionari
Search Deals
One-way flight from Seattle/Tacoma Intl to Trieste Ronchi dei Legionari
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle 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 March 22, 2026.
Use the filters below to find and compare flights from Seattle 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

Wed 8/12

7:00 am-10:25 am

2 stops18h 25m

Trieste Ronchi dei Legionari

Wed 8/19

6:35 am-9:07 pm

2 stops23h 32m

$1,129

SeattleTrieste

SEA - TRS

SEATRS

Seattle/Tacoma Intl

Mon 8/10

7:30 am-10:25 am

2 stops17h 55m

Trieste Ronchi dei Legionari

Wed 8/26

6:35 am-9:07 pm

2 stops23h 32m

$1,129

SeattleTrieste

SEA - TRS

SEATRS

Seattle/Tacoma Intl

Tue 8/11

1:19 pm-10:25 am

2 stops36h 06m

Trieste Ronchi dei Legionari

Wed 8/26

6:35 am-9:07 pm

2 stops23h 32m

$1,129

SeattleTrieste

SEA - TRS

SEATRS

Seattle/Tacoma Intl

Tue 8/11

1:19 pm-10:25 am

2 stops36h 06m

Trieste Ronchi dei Legionari

Tue 8/25

6:35 am-9:07 pm

2 stops23h 32m

$1,129

SeattleTrieste

SEA - TRS

SEATRS

Seattle/Tacoma Intl

Thu 8/6

7:01 am-10:25 am

2 stops18h 24m

Trieste Ronchi dei Legionari

Wed 8/26

6:35 am-6:59 pm

2 stops21h 24m

$1,181

SeattleTrieste

SEA - TRS

SEATRS

Seattle/Tacoma Intl

Fri 7/3

10:30 am-9:55 pm

2 stops26h 25m

Trieste Ronchi dei Legionari

Fri 7/17

6:10 am-4:59 pm

2 stops19h 49m

$1,192

SeattleTrieste

SEA - TRS

SEATRS

Seattle/Tacoma Intl

Sun 7/5

5:00 am-10:25 am

2 stops44h 25m

Trieste Ronchi dei Legionari

Wed 8/19

6:35 am-10:42 pm

2 stops25h 07m

$1,237

SeattleTrieste

SEA - TRS

SEATRS

Seattle/Tacoma Intl

Sat 7/4

10:30 am-10:15 pm

2 stops26h 45m

Trieste Ronchi dei Legionari

Sat 7/18

6:15 am-4:59 pm

2 stops19h 44m

$1,256
Quickest round-trip

SeattleTrieste

SEA - TRS

SEATRS

Seattle/Tacoma Intl

Mon 7/13

3:40 pm-6:30 pm

2 stops17h 50m

Trieste Ronchi dei Legionari

Thu 7/23

11:15 am-8:40 pm

2 stops18h 25m

$1,279

SeattleTrieste

SEA - TRS

SEATRS

Seattle/Tacoma Intl

Mon 6/22

3:40 pm-6:30 pm

2 stops17h 50m

Trieste Ronchi dei Legionari

Tue 6/30

11:15 am-11:45 am

2 stops33h 30m

$1,282

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/21

Showing 1-10 of 14 resultsSorted by cheapest first
1
2

Compare providers for flights from Seattle to Trieste

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Seattle to Trieste in March.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Seattle-Trieste flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-Trieste flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Seattle-Trieste flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seattle-Trieste flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Seattle-Trieste flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Seattle to Trieste

Have a flexible travel schedule? Discover the best time to fly to Trieste from Seattle 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 Seattle to Trieste

What is the cheapest month to book a flight from Seattle to Trieste?

Currently, March is the cheapest month in which you can book a flight from Seattle to Trieste (average of $433). Flying from Seattle to Trieste in June is currently the most expensive (average of $805). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Related info for your journey

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

  • How long is the flight from Seattle to Trieste?

    Airlines like United Airlines fly from Seattle to Trieste in about 18h 25m. The time it takes to get you to your destination can typically vary by up to . The distance between Seattle and Trieste is about 5456 mi.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Seattle 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.

  • What is the cheapest month to book a flight from Seattle to Trieste?

    Currently, March is the cheapest month in which you can book a flight from Seattle to Trieste (average of $433). Flying from Seattle to Trieste in June is currently the most expensive (average of $805). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Seattle to Trieste

See prices for flight routes from nearby airports that may be better suited for you.
Pasco to Vicenza flights
Portland to Trieste flights

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.