What airlines fly to Trieste?

Delta, British Airways and Lufthansa are the top three most popular airlines that fly to Trieste from Seattle according to our data. Delta is the first choice among our users, with 38% of people opting to fly with this airline when traveling to Trieste. Keep in mind that there are 11 different airlines that fly to Trieste on a routine basis, so you have a few additional options to choose from.

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.

$669 Cheap Flights from Seattle to Trieste in 2025/26

1 adult

0 bags

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Find the cheapest flights from Seattle to Trieste

Round-trip

One-way

Cheap round-trip flights

3:00 pm - 10:30 pmSEA-TRS

23h 30m1 stop

6:25 am - 7:16 pmTRS-SEA

21h 51m2 stops

$669

Find Deal

Thu, Oct 30 - Thu, Nov 6

3:00 pm - 2:05 pmSEA-TRS

15h 05m1 stop

6:25 am - 12:10 pmTRS-SEA

14h 45m1 stop

$672Lufthansa

Find Deal

Thu, Oct 30 - Thu, Nov 6

12:35 pm - 10:40 pmSEA-TRS

25h 05m2 stops

3:00 pm - 12:10 pmTRS-SEA

30h 10m1 stop

$710Lufthansa

Find Deal

Wed, Nov 19 - Sun, Nov 23

7:00 am - 2:05 pmSEA-TRS

22h 05m2 stops

3:00 pm - 12:10 pmTRS-SEA

30h 10m1 stop

$711Lufthansa

Find Deal

Wed, Nov 19 - Sun, Nov 23

7:00 am - 2:05 pmSEA-TRS

22h 05m2 stops

3:00 pm - 6:52 pmTRS-SEA

36h 52m2 stops

$721Lufthansa

Find Deal

Wed, Nov 19 - Sun, Nov 23

7:19 am - 2:30 pmSEA-TRS

23h 11m2 stops

6:35 am - 10:03 pmTRS-SEA

24h 28m2 stops

$745KLM

Find Deal

Thu, Oct 30 - Thu, Nov 6

10:00 am - 10:35 pmSEA-TRS

27h 35m2 stops

2:45 pm - 7:16 pmTRS-SEA

37h 31m2 stops

$838

Find Deal

Sun, Oct 19 - Sat, Oct 25

2:20 pm - 10:35 pmSEA-TRS

23h 15m1 stop

2:45 pm - 7:16 pmTRS-SEA

37h 31m2 stops

$939

Find Deal

Sun, Oct 19 - Sat, Oct 25

5:05 pm - 10:35 pmSEA-TRS

20h 30m1 stop

6:30 am - 3:15 pmTRS-SEA

17h 45m1 stop

$975

Find Deal

Sun, Oct 19 - Sat, Oct 25

3:40 pm - 10:30 pmSEA-TRS

22h 50m3 stops

6:25 am - 7:16 pmTRS-SEA

21h 51m3 stops

$1,002Lufthansa

Find Deal

Thu, Oct 30 - Thu, Nov 6

Lufthansa flights from Seattle to Trieste

Our best Lufthansa deals on Seattle to Trieste flight tickets

Lufthansa

Oct 30

SEA3:00 pmSeattle/Tacoma Intl

15h 05m

1 stop

TRS2:05 pmTrieste Ronchi dei Legionari

Nov 6

TRS6:25 amTrieste Ronchi dei Legionari

14h 45m

1 stop

SEA12:10 pmSeattle/Tacoma Intl

$672

Find similar

Lufthansa

Nov 19

SEA12:35 pmSeattle/Tacoma Intl

25h 05m

2 stops

TRS10:40 pmTrieste Ronchi dei Legionari

Nov 23

TRS3:00 pmTrieste Ronchi dei Legionari

30h 10m

1 stop

SEA12:10 pmSeattle/Tacoma Intl

$710

Find similar

Lufthansa

Nov 19

SEA7:00 amSeattle/Tacoma Intl

22h 05m

2 stops

TRS2:05 pmTrieste Ronchi dei Legionari

Nov 23

TRS3:00 pmTrieste Ronchi dei Legionari

30h 10m

1 stop

SEA12:10 pmSeattle/Tacoma Intl

$711

Find similar

Fly from

Fly to

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

SeattleTrieste

SEA - TRS

SEATRS

Seattle/Tacoma Intl

Wed 11/19

12:35 pm-10:40 pm

2 stops25h 05m

Trieste Ronchi dei Legionari

Sun 11/23

3:00 pm-12:10 pm

1 stop30h 10m

$710

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

Wed 11/19

7:00 am-2:05 pm

2 stops22h 05m

Trieste Ronchi dei Legionari

Sun 11/23

3:00 pm-6:52 pm

2 stops36h 52m

$721

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

Sun 10/19

2:20 pm-10:35 pm

1 stop23h 15m

Trieste Ronchi dei Legionari

Sat 10/25

2:45 pm-7:16 pm

2 stops37h 31m

$939

SeattleTrieste

SEA - TRS

SEATRS

Seattle/Tacoma Intl

Sun 10/19

5:05 pm-10:35 pm

1 stop20h 30m

Trieste Ronchi dei Legionari

Sat 10/25

6:30 am-3:15 pm

1 stop17h 45m

$975

SeattleTrieste

SEA - TRS

SEATRS

Seattle/Tacoma Intl

Thu 10/30

3:40 pm-10:30 pm

3 stops22h 50m

Trieste Ronchi dei Legionari

Thu 11/6

6:25 am-7:16 pm

3 stops21h 51m

$1,002

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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

Prices

Airlines

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

Direct flights	None

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

Search flight deals

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.

Grado

Udine

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.