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.

$461 Cheap Flights from Trieste to Seattle in 2026

1 adult

0 bags

Find the cheapest flights from Trieste to Seattle

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:10 am - 12:20 pm

TRS

SEA

15h 10m

1 stop

10:45 am - 1:45 pm

SEA

TRS

18h 00m

2 stops

$952Multiple Airlines

Fri, May 15 - Tue, May 19

6:10 am - 12:20 pm

TRS

SEA

15h 10m

1 stop

2:10 pm - 1:45 pm

SEA

TRS

14h 35m

1 stop

$955Lufthansa

Fri, May 15 - Tue, May 19

6:10 am - 6:30 pm

TRS

SEA

21h 20m

2 stops

10:45 am - 1:45 pm

SEA

TRS

18h 00m

2 stops

$987Multiple Airlines

Fri, May 15 - Tue, May 19

6:15 am - 12:20 pm

TRS

SEA

15h 05m

1 stop

10:45 am - 10:15 pm

SEA

TRS

26h 30m

2 stops

$1,147Lufthansa

Sat, Jun 13 - Sat, Jun 20

6:35 am - 5:55 pm

TRS

SEA

20h 20m

3 stops

3:40 pm - 10:25 am

SEA

TRS

33h 45m

3 stops

$1,177Multiple Airlines

Fri, May 15 - Tue, May 19

6:35 am - 7:14 pm

TRS

SEA

45h 39m

3 stops

7:00 am - 10:25 am

SEA

TRS

18h 25m

2 stops

$1,194United Airlines

Thu, Oct 1 - Mon, Oct 5

6:35 am - 9:56 pm

TRS

SEA

48h 21m

3 stops

7:00 am - 10:25 am

SEA

TRS

18h 25m

2 stops

$1,195United Airlines

Thu, Oct 1 - Mon, Oct 5

6:35 am - 7:14 pm

TRS

SEA

45h 39m

3 stops

7:00 am - 10:25 am

SEA

TRS

18h 25m

2 stops

$1,198United Airlines

Thu, Oct 1 - Mon, Oct 5

6:10 am - 6:56 pm

TRS

SEA

21h 46m

2 stops

8:53 am - 10:15 pm

SEA

TRS

28h 22m

2 stops

$1,206Multiple Airlines

Wed, Jul 29 - Tue, Aug 11

6:10 am - 3:40 pm

TRS

SEA

18h 30m

1 stop

8:53 am - 10:15 pm

SEA

TRS

28h 22m

2 stops

$1,218Multiple Airlines

Wed, Jul 29 - Tue, Aug 11

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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 1

TRS6:35 amTrieste Ronchi dei Legionari

45h 39m

3 stops

SEA7:14 pmSeattle/Tacoma Intl

Oct 5

SEA7:00 amSeattle/Tacoma Intl

18h 25m

2 stops

TRS10:25 amTrieste Ronchi dei Legionari

$1,194

United Airlines

Oct 1

TRS6:35 amTrieste Ronchi dei Legionari

48h 21m

3 stops

SEA9:56 pmSeattle/Tacoma Intl

Oct 5

SEA7:00 amSeattle/Tacoma Intl

18h 25m

2 stops

TRS10:25 amTrieste Ronchi dei Legionari

$1,195

United Airlines

Oct 1

TRS6:35 amTrieste Ronchi dei Legionari

45h 39m

3 stops

SEA7:14 pmSeattle/Tacoma Intl

Oct 5

SEA7:00 amSeattle/Tacoma Intl

18h 25m

2 stops

TRS10:25 amTrieste Ronchi dei Legionari

$1,198

Lufthansa flights from Trieste to Seattle

Our best Lufthansa deals on Trieste to Seattle flight tickets

Lufthansa

May 15

TRS6:10 amTrieste Ronchi dei Legionari

15h 10m

1 stop

SEA12:20 pmSeattle/Tacoma Intl

May 19

SEA2:10 pmSeattle/Tacoma Intl

14h 35m

1 stop

TRS1:45 pmTrieste Ronchi dei Legionari

$955

Lufthansa

Jun 13

TRS6:15 amTrieste Ronchi dei Legionari

15h 05m

1 stop

SEA12:20 pmSeattle/Tacoma Intl

Jun 20

SEA10:45 amSeattle/Tacoma Intl

26h 30m

2 stops

TRS10:15 pmTrieste Ronchi dei Legionari

$1,147

Lufthansa

Jul 29

TRS2:40 pmTrieste Ronchi dei Legionari

30h 15m

1 stop

SEA11:55 amSeattle/Tacoma Intl

Aug 11

SEA2:10 pmSeattle/Tacoma Intl

14h 35m

1 stop

TRS1:45 pmTrieste Ronchi dei Legionari

$1,410

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

TriesteSeattle

TRS - SEA

TRSSEA

Trieste Ronchi dei Legionari

Fri 5/15

6:10 am-12:20 pm

1 stop15h 10m

Seattle/Tacoma Intl

Tue 5/19

10:45 am-1:45 pm

2 stops18h 00m

$952

Quickest round-trip

TriesteSeattle

TRS - SEA

TRSSEA

Trieste Ronchi dei Legionari

Fri 5/15

6:10 am-12:20 pm

1 stop15h 10m

Seattle/Tacoma Intl

Tue 5/19

2:10 pm-1:45 pm

1 stop14h 35m

$955

TriesteSeattle

TRS - SEA

TRSSEA

Trieste Ronchi dei Legionari

Fri 5/15

6:10 am-6:30 pm

2 stops21h 20m

Seattle/Tacoma Intl

Tue 5/19

10:45 am-1:45 pm

2 stops18h 00m

$987

TriesteSeattle

TRS - SEA

TRSSEA

Trieste Ronchi dei Legionari

Sat 6/13

6:15 am-12:20 pm

1 stop15h 05m

Seattle/Tacoma Intl

Sat 6/20

10:45 am-10:15 pm

2 stops26h 30m

$1,147

TriesteSeattle

TRS - SEA

TRSSEA

Trieste Ronchi dei Legionari

Fri 5/15

6:35 am-5:55 pm

3 stops20h 20m

Seattle/Tacoma Intl

Tue 5/19

3:40 pm-10:25 am

3 stops33h 45m

$1,177

TriesteSeattle

TRS - SEA

TRSSEA

Trieste Ronchi dei Legionari

Thu 10/1

6:35 am-7:14 pm

3 stops45h 39m

Seattle/Tacoma Intl

Mon 10/5

7:00 am-10:25 am

2 stops18h 25m

$1,194

TriesteSeattle

TRS - SEA

TRSSEA

Trieste Ronchi dei Legionari

Thu 10/1

6:35 am-9:56 pm

3 stops48h 21m

Seattle/Tacoma Intl

Mon 10/5

7:00 am-10:25 am

2 stops18h 25m

$1,195

TriesteSeattle

TRS - SEA

TRSSEA

Trieste Ronchi dei Legionari

Thu 10/1

6:35 am-7:14 pm

3 stops45h 39m

Seattle/Tacoma Intl

Mon 10/5

7:00 am-10:25 am

2 stops18h 25m

$1,198

TriesteSeattle

TRS - SEA

TRSSEA

Trieste Ronchi dei Legionari

Wed 7/29

6:10 am-6:56 pm

2 stops21h 46m

Seattle/Tacoma Intl

Tue 8/11

8:53 am-10:15 pm

2 stops28h 22m

$1,206

TriesteSeattle

TRS - SEA

TRSSEA

Trieste Ronchi dei Legionari

Wed 7/29

6:10 am-3:40 pm

1 stop18h 30m

Seattle/Tacoma Intl

Tue 8/11

8:53 am-10:15 pm

2 stops28h 22m

$1,218

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 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?

KLM is the most popular carrier operating from Trieste Ronchi dei Legionari to Seattle/Tacoma Intl

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	17h 05m
Direct flights	None

The fastest flight from Trieste to Seattle takes 17h 05m

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. 17h 05m 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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Lynnwood

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Kent

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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.

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

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.