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

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

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

What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

The required travel and health documents for your Seattle/Tacoma Intl 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 Seattle/Tacoma Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$617 Cheap Flights from Trieste to Seattle in 2026

Find the cheapest flights from Trieste to Seattle

Round-trip

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Cheap round-trip flights

Enter your travel dates to find the best prices.

6:35 am - 9:59 pmTRS Trieste Ronchi dei Legionari-SEA Seattle/Tacoma Intl

24h 24m3 stops Rome Fiumicino Washington, D.C. Dulles Intl Los Angeles Los Angeles

9:05 am - 10:25 amSEA Seattle/Tacoma Intl-TRS Trieste Ronchi dei Legionari

40h 20m2 stops San Francisco Rome Fiumicino

$1,212United Airlines

Thu, Oct 15 - Sun, Oct 18

6:35 am - 4:03 pmTRS Trieste Ronchi dei Legionari-SEA Seattle/Tacoma Intl

42h 28m2 stops Rome Fiumicino Denver Intl

11:14 pm - 10:25 amSEA Seattle/Tacoma Intl-TRS Trieste Ronchi dei Legionari

26h 11m2 stops Washington, D.C. Dulles Intl Rome Fiumicino

$1,214United Airlines

Thu, Oct 15 - Sun, Oct 18

6:35 am - 4:03 pmTRS Trieste Ronchi dei Legionari-SEA Seattle/Tacoma Intl

42h 28m2 stops Rome Fiumicino Denver Intl

11:14 pm - 10:25 amSEA Seattle/Tacoma Intl-TRS Trieste Ronchi dei Legionari

26h 11m2 stops Washington, D.C. Dulles Intl Rome Fiumicino

$1,215United Airlines

Thu, Oct 15 - Sun, Oct 18

6:35 am - 10:54 amTRS Trieste Ronchi dei Legionari-SEA Seattle/Tacoma Intl

37h 19m2 stops Rome Fiumicino Newark

8:25 am - 10:25 amSEA Seattle/Tacoma Intl-TRS Trieste Ronchi dei Legionari

17h 00m2 stops Washington, D.C. Dulles Intl Rome Fiumicino

$1,216United Airlines

Thu, Oct 15 - Sun, Oct 18

6:35 am - 5:50 pmTRS Trieste Ronchi dei Legionari-SEA Seattle/Tacoma Intl

20h 15m1 stop Rome Fiumicino

11:25 pm - 8:35 pmSEA Seattle/Tacoma Intl-TRS Trieste Ronchi dei Legionari

36h 10m2 stops Reykjavik Keflavik Intl Brussels Bruxelles-National

$1,221Multiple Airlines

Sun, Aug 23 - Thu, Aug 27

6:35 am - 11:45 amTRS Trieste Ronchi dei Legionari-SEA Seattle/Tacoma Intl

38h 10m2 stops Rome Fiumicino Reykjavik Keflavik Intl

3:40 pm - 10:25 amSEA Seattle/Tacoma Intl-TRS Trieste Ronchi dei Legionari

33h 45m2 stops Reykjavik Keflavik Intl Rome Fiumicino

$1,307Multiple Airlines

Sun, Aug 23 - Thu, Aug 27

6:35 am - 5:50 pmTRS Trieste Ronchi dei Legionari-SEA Seattle/Tacoma Intl

20h 15m1 stop Rome Fiumicino

5:30 pm - 10:25 amSEA Seattle/Tacoma Intl-TRS Trieste Ronchi dei Legionari

31h 55m1 stop Rome Fiumicino

$1,454Multiple Airlines

Sun, Aug 23 - Thu, Aug 27

6:35 am - 9:00 pmTRS Trieste Ronchi dei Legionari-SEA Seattle/Tacoma Intl

23h 25m3 stops Rome Fiumicino Barcelona-El Prat Calgary

3:40 pm - 6:30 pmSEA Seattle/Tacoma Intl-TRS Trieste Ronchi dei Legionari

17h 50m2 stops Reykjavik Keflavik Intl Rome Fiumicino

$1,462Multiple Airlines

Sun, Aug 23 - Thu, Aug 27

6:35 am - 9:00 pmTRS Trieste Ronchi dei Legionari-SEA Seattle/Tacoma Intl

23h 25m3 stops Rome Fiumicino Barcelona-El Prat Calgary

3:40 pm - 10:15 pmSEA Seattle/Tacoma Intl-TRS Trieste Ronchi dei Legionari

21h 35m3 stops Reykjavik Keflavik Intl Václav Havel Prague Frankfurt am Main

$1,548Multiple Airlines

Sun, Aug 23 - Thu, Aug 27

6:35 am - 5:00 pmTRS Trieste Ronchi dei Legionari-SEA Seattle/Tacoma Intl

19h 25m2 stops Rome Fiumicino Reykjavik Keflavik Intl

2:35 pm - 6:30 pmSEA Seattle/Tacoma Intl-TRS Trieste Ronchi dei Legionari

18h 55m2 stops Reykjavik Keflavik Intl Rome Fiumicino

$3,830Icelandair

Mon, Dec 21 - Tue, Feb 2

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United Airlines flights from Trieste to Seattle

Our best United Airlines deals on Trieste to Seattle flight tickets

United Airlines

Oct 15

TRS6:35 amTrieste Ronchi dei Legionari

36h 01m

2 stops

SEA9:36 amSeattle/Tacoma Intl

Oct 18

SEA7:00 amSeattle/Tacoma Intl

18h 25m

2 stops

TRS10:25 amTrieste Ronchi dei Legionari

$1,212

United Airlines

Oct 15

TRS6:35 amTrieste Ronchi dei Legionari

42h 28m

2 stops

SEA4:03 pmSeattle/Tacoma Intl

Oct 18

SEA11:14 pmSeattle/Tacoma Intl

26h 11m

2 stops

TRS10:25 amTrieste Ronchi dei Legionari

$1,214

United Airlines

Oct 15

TRS6:35 amTrieste Ronchi dei Legionari

42h 28m

2 stops

SEA4:03 pmSeattle/Tacoma Intl

Oct 18

SEA11:14 pmSeattle/Tacoma Intl

26h 11m

2 stops

TRS10:25 amTrieste Ronchi dei Legionari

$1,215

Icelandair flights from Trieste to Seattle

Our best Icelandair deals on Trieste to Seattle flight tickets

Icelandair

Dec 21

TRS6:35 amTrieste Ronchi dei Legionari

19h 25m

2 stops

SEA5:00 pmSeattle/Tacoma Intl

Feb 2

SEA2:35 pmSeattle/Tacoma Intl

18h 55m

2 stops

TRS6:30 pmTrieste Ronchi dei Legionari

$3,830

Icelandair

Dec 19

TRS6:35 amTrieste Ronchi dei Legionari

19h 25m

2 stops

SEA5:00 pmSeattle/Tacoma Intl

Feb 2

SEA2:35 pmSeattle/Tacoma Intl

18h 55m

2 stops

TRS6:30 pmTrieste Ronchi dei Legionari

$3,880

Icelandair

Dec 21

TRS6:35 amTrieste Ronchi dei Legionari

19h 25m

2 stops

SEA5:00 pmSeattle/Tacoma Intl

Jan 30

SEA2:35 pmSeattle/Tacoma Intl

18h 55m

2 stops

TRS6:30 pmTrieste Ronchi dei Legionari

$4,046

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

TriesteSeattle

TRS Trieste Ronchi dei Legionari - SEA Seattle/Tacoma Intl

TRSSEA

Trieste Ronchi dei Legionari

Thu 10/15

6:35 am-9:59 pm

3 stops24h 24m

Seattle/Tacoma Intl

Sun 10/18

9:05 am-10:25 am

2 stops40h 20m

$1,212

TriesteSeattle

TRS Trieste Ronchi dei Legionari - SEA Seattle/Tacoma Intl

TRSSEA

Trieste Ronchi dei Legionari

Thu 10/15

6:35 am-4:03 pm

2 stops42h 28m

Seattle/Tacoma Intl

Sun 10/18

11:14 pm-10:25 am

2 stops26h 11m

$1,214

TriesteSeattle

TRS Trieste Ronchi dei Legionari - SEA Seattle/Tacoma Intl

TRSSEA

Trieste Ronchi dei Legionari

Thu 10/15

6:35 am-4:03 pm

2 stops42h 28m

Seattle/Tacoma Intl

Sun 10/18

11:14 pm-10:25 am

2 stops26h 11m

$1,215

TriesteSeattle

TRS Trieste Ronchi dei Legionari - SEA Seattle/Tacoma Intl

TRSSEA

Trieste Ronchi dei Legionari

Thu 10/15

6:35 am-10:54 am

2 stops37h 19m

Seattle/Tacoma Intl

Sun 10/18

8:25 am-10:25 am

2 stops17h 00m

$1,216

TriesteSeattle

TRS Trieste Ronchi dei Legionari - SEA Seattle/Tacoma Intl

TRSSEA

Trieste Ronchi dei Legionari

Sun 8/23

6:35 am-5:50 pm

1 stop20h 15m

Seattle/Tacoma Intl

Thu 8/27

11:25 pm-8:35 pm

2 stops36h 10m

$1,221

TriesteSeattle

TRS Trieste Ronchi dei Legionari - SEA Seattle/Tacoma Intl

TRSSEA

Trieste Ronchi dei Legionari

Sun 8/23

6:35 am-11:45 am

2 stops38h 10m

Seattle/Tacoma Intl

Thu 8/27

3:40 pm-10:25 am

2 stops33h 45m

$1,307

TriesteSeattle

TRS Trieste Ronchi dei Legionari - SEA Seattle/Tacoma Intl

TRSSEA

Trieste Ronchi dei Legionari

Sun 8/23

6:35 am-5:50 pm

1 stop20h 15m

Seattle/Tacoma Intl

Thu 8/27

5:30 pm-10:25 am

1 stop31h 55m

$1,454

TriesteSeattle

TRS Trieste Ronchi dei Legionari - SEA Seattle/Tacoma Intl

TRSSEA

Trieste Ronchi dei Legionari

Sun 8/23

6:35 am-9:00 pm

3 stops23h 25m

Seattle/Tacoma Intl

Thu 8/27

3:40 pm-6:30 pm

2 stops17h 50m

$1,462

TriesteSeattle

TRS Trieste Ronchi dei Legionari - SEA Seattle/Tacoma Intl

TRSSEA

Trieste Ronchi dei Legionari

Sun 8/23

6:35 am-9:00 pm

3 stops23h 25m

Seattle/Tacoma Intl

Thu 8/27

3:40 pm-10:15 pm

3 stops21h 35m

$1,548

Quickest round-trip

TriesteSeattle

TRS Trieste Ronchi dei Legionari - SEA Seattle/Tacoma Intl

TRSSEA

Trieste Ronchi dei Legionari

Mon 12/21

6:35 am-5:00 pm

2 stops19h 25m

Seattle/Tacoma Intl

Tue 2/2

2:35 pm-6:30 pm

2 stops18h 55m

$3,830

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 16 resultsSorted by cheapest first

How to get the cheapest flight ticket from Trieste to Seattle

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 Trieste Ronchi dei Legionari to Seattle/Tacoma Intl?

Icelandair and United Airlines are the most popular carriers operating from Trieste Ronchi dei Legionari to Seattle/Tacoma Intl

What airlines fly to Seattle?

British Airways, Condor and United Airlines are the top three most popular airlines that fly to Seattle from Trieste according to our data. British Airways is the first choice among our users, with 35% of people opting to fly with this airline when traveling to Seattle. Keep in mind that there are 3 different airlines that fly to Seattle on a routine basis, so you have a few additional options to choose from.

When to book flights from Trieste to Seattle

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

Estimated round-trip price

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

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

Fastest flight time	24h 24m
Direct flights	None

The fastest flight from Trieste to Seattle takes 24h 24m

There are no direct flights from Trieste to Seattle. There are no popular flight routes from Trieste to Seattle.

Search flight deals

Frequently asked questions about flying from Trieste to Seattle

How far is Trieste Ronchi dei Legionari to Seattle/Tacoma Intl by plane?
A flight from Trieste Ronchi dei Legionari to Seattle/Tacoma Intl will travel around 5463.5 mi. 24h 24m is a normal flight duration for this route.
When did momondo last update prices for flights from Trieste Ronchi dei Legionari Airport to Seattle/Tacoma Intl Airport?
Prices for flights from Trieste Ronchi dei Legionari Airport to Seattle/Tacoma Intl Airport were last updated today.
How old do you have to be to fly from Trieste Ronchi dei Legionari Airport to Seattle/Tacoma Intl 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 Trieste Ronchi dei Legionari Airport to Seattle/Tacoma Intl Airport.
What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?
The required travel and health documents for your Seattle/Tacoma Intl 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 Seattle/Tacoma Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

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Leavenworth

SeaTac

Ocean Shores

Renton

Olympia

Kent

Lynnwood

Redmond

Lakewood

Federal Way

Puyallup

Tukwila

Fife

Cle Elum

Marysville

Kirkland

Centralia

Shoreline

Lacey

Why use momondo?

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

Finding the right flight to Seattle from Trieste 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 Seattle quick and easy, saving you time and money.

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

All flight searches from Trieste to Seattle on momondo can be filtered to show those which offer flexible booking policies.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Seattle from Trieste.

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Yes. momondo can track prices for Trieste to Seattle flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.