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Cheap flights from Seattle to Trieste from $316

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Trieste departing on 2/1. 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 Seattle to Trieste

Cheap round-trip flights

Enter your travel dates to find the best prices.
Turkish Airlines Logo
7:00 pm - 6:30 pm
SEA
-
TRS
38h 30m2 stops
Turkish Airlines Logo
11:15 am - 5:05 pm
TRS
-
SEA
38h 50m2 stops
$1,085Turkish Airlines
Wed, Feb 4 - Sun, Feb 8
Lufthansa Logo
7:00 am - 2:05 pm
SEA
-
TRS
23h 05m2 stops
Lufthansa Logo
6:25 am - 2:20 pm
TRS
-
SEA
15h 55m2 stops
$1,120Lufthansa
Wed, Mar 18 - Fri, Mar 27
Turkish Airlines Logo
7:00 pm - 6:30 pm
SEA
-
TRS
38h 30m2 stops
Turkish Airlines Logo
11:15 am - 5:05 pm
TRS
-
SEA
38h 50m2 stops
$1,131Turkish Airlines
Wed, Feb 4 - Sun, Feb 8
United Airlines Logo
7:00 am - 10:25 am
SEA
-
TRS
18h 25m2 stops
United Airlines Logo
6:35 am - 10:43 pm
TRS
-
SEA
25h 08m3 stops
$1,803United Airlines
Wed, Feb 4 - Sun, Feb 8

Turkish Airlines flights from Seattle to Trieste

Our best Turkish Airlines deals on Seattle to Trieste flight tickets
Turkish Airlines
Feb 4
SEA7:00 pmSeattle/Tacoma Intl
38h 30m
2 stops
TRS6:30 pmTrieste Ronchi dei Legionari
Feb 8
TRS11:15 amTrieste Ronchi dei Legionari
38h 50m
2 stops
SEA5:05 pmSeattle/Tacoma Intl
$1,085
Find similar
Turkish Airlines
Feb 4
SEA7:00 pmSeattle/Tacoma Intl
38h 30m
2 stops
TRS6:30 pmTrieste Ronchi dei Legionari
Feb 8
TRS11:15 amTrieste Ronchi dei Legionari
38h 50m
2 stops
SEA5:05 pmSeattle/Tacoma Intl
$1,131
Find similar

momondo 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, momondo users made 832,500 searches. Data last updated December 26, 2025.
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

SeattleTrieste

SEA - TRS

SEATRS

Seattle/Tacoma Intl

Wed 2/4

7:00 pm-6:30 pm

2 stops38h 30m

Trieste Ronchi dei Legionari

Sun 2/8

11:15 am-5:05 pm

2 stops38h 50m

$1,085

SeattleTrieste

SEA - TRS

SEATRS

Seattle/Tacoma Intl

Wed 3/18

7:00 am-2:05 pm

2 stops23h 05m

Trieste Ronchi dei Legionari

Fri 3/27

6:25 am-2:20 pm

2 stops15h 55m

$1,120

SeattleTrieste

SEA - TRS

SEATRS

Seattle/Tacoma Intl

Wed 2/4

7:00 pm-6:30 pm

2 stops38h 30m

Trieste Ronchi dei Legionari

Sun 2/8

11:15 am-5:05 pm

2 stops38h 50m

$1,131

SeattleTrieste

SEA - TRS

SEATRS

Seattle/Tacoma Intl

Wed 2/4

7:00 am-10:25 am

2 stops18h 25m

Trieste Ronchi dei Legionari

Sun 2/8

6:35 am-10:43 pm

3 stops25h 08m

$1,803

SeattleTrieste

SEA - TRS

SEATRS

Seattle/Tacoma Intl

Sun 2/1

2:35 pm-10:50 pm

3 stops23h 15m

$316

SeattleTrieste

SEA - TRS

SEATRS

Seattle/Tacoma Intl

Sun 2/1

12:01 pm-10:50 pm

2 stops25h 49m

$433

SeattleTrieste

SEA - TRS

SEATRS

Seattle/Tacoma Intl

Fri 5/22

3:40 pm-11:45 pm

3 stops23h 05m

$570

SeattleTrieste

SEA - TRS

SEATRS

Seattle/Tacoma Intl

Fri 5/22

6:45 pm-3:25 pm

1 stop35h 40m

$610

SeattleTrieste

SEA - TRS

SEATRS

Seattle/Tacoma Intl

Fri 5/22

6:11 am-12:25 pm

2 stops21h 14m

$663

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to Trieste from

How to get the cheapest flight ticket from Seattle 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 day to depart on your flight to Trieste?

The cheapest day to depart on your flight to Trieste is on a Tuesday when prices can be found for as low as $1,169. This is often the case because there is less demand to fly during this day of the week. Flights from Seattle to Trieste on a Wednesday will generally be more expensive and average around $1,307. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

When to book flights from Seattle to Trieste

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to Trieste according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Seattle to Trieste (SEA to TRS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Trieste

Fastest flight time

15h 00m

Direct flights

None
The fastest flight from Seattle to Trieste takes 15h 00m
There are no direct flights from Seattle to Trieste. There are no popular flight routes from Seattle to Trieste.
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  • How far is Seattle/Tacoma Intl to Trieste Ronchi dei Legionari by plane?

    A flight from Seattle/Tacoma Intl to Trieste Ronchi dei Legionari will travel around 5463.5 mi. 15h 00m is a normal flight duration for this route.

  • When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Trieste Ronchi dei Legionari Airport?

    Prices for flights from Seattle/Tacoma Intl Airport to Trieste Ronchi dei Legionari Airport were last updated today.

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to Trieste Ronchi dei Legionari Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Trieste Ronchi dei Legionari Airport.

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

    The required travel and health documents for your Trieste Ronchi dei Legionari Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Trieste Ronchi dei Legionari Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

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 Seattle to Trieste?

It is quick and easy to find Seattle to Trieste flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Trieste that suits you.

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

Flights from Seattle 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 Seattle to Trieste?

Once all potential Seattle to Trieste flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

If you are simply researching potential flights to Trieste, momondo offers a useful price alert feature which will track prices for flights to Trieste from Seattle and alert you when they change.

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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Fly your favorite airline to Trieste

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