$756+ Cheap flights from Seattle (SEA) to Trieste (TRS)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — TRS
Oct 22 — Oct 291
Round-trip
1 adult, Economy
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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
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Best
Last-minute
Cheapest flights from Seattle to TriesteExplore 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 September 22, 2026.
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 September 22, 2026.
This KLM deal was found by Cheapflights users on 9/21. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/57:15 am -
2 stops22h 15m
Thu 11/126:35 am -
2 stops25h 25m
Deal found 9/21![KLM logo]()
$756
This KLM deal was found by Cheapflights users on 9/18. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/182:05 pm -
1 stop19h 25m
Sat 10/316:35 am -
2 stops37h 01m
Deal found 9/18![KLM logo]()
$973
This KLM deal was found by Cheapflights users on 9/18. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/182:05 pm -
1 stop15h 40m
Fri 10/306:35 am -
2 stops25h 24m
Deal found 9/18![KLM logo]()
$1,020
This KLM deal was found by Cheapflights users on 9/18. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/162:05 pm -
1 stop15h 25m
Sat 10/316:35 am -
2 stops37h 01m
Deal found 9/18![KLM logo]()
$1,023
This KLM deal was found by Cheapflights users on 9/18. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/177:15 am -
2 stops22h 15m
Sat 10/316:35 am -
2 stops37h 01m
Deal found 9/18![KLM logo]()
$1,028
This KLM deal was found by Cheapflights users on 9/18. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/162:05 pm -
1 stop15h 25m
Fri 10/306:35 am -
2 stops25h 24m
Deal found 9/18![KLM logo]()
$1,070
This KLM deal was found by Cheapflights users on 9/18. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/177:15 am -
2 stops22h 15m
Fri 10/306:35 am -
2 stops22h 15m
Deal found 9/18![KLM logo]()
$1,075
This Mytrip deal was found by Cheapflights users on 9/21. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/51:50 pm -
2 stops21h 55m
Thu 11/1211:15 am -
3 stops34h 45m
Deal found 9/21![Multiple Airlines logo]()
$1,206
This KAYAK deal was found by Cheapflights users on 9/19. 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 10/2110:50 am -
2 stops18h 10m
Wed 11/43:15 pm -
2 stops29h 45m
Deal found 9/19![Lufthansa logo]()
$1,247
This KAYAK deal was found by Cheapflights users on 9/19. 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 10/253:50 pm -
2 stops42h 40m
Wed 11/43:15 pm -
2 stops29h 45m
Deal found 9/19![Lufthansa logo]()
$1,253
Best flights from Seattle to TriesteDiscover carefully curated flight deals from Seattle to Trieste that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 22, 2026.
Discover carefully curated flight deals from Seattle to Trieste that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 22, 2026.
This KLM deal was found by Cheapflights users on 9/18. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/187:15 am -
2 stops22h 30m
Sat 10/316:35 am -
2 stops37h 01m
Deal found 9/18![KLM logo]()
$978
This Mytrip deal was found by Cheapflights users on 9/21. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/57:45 am -
3 stops23h 55m
Thu 11/127:15 pm -
3 stops30h 45m
Deal found 9/21![Multiple Airlines logo]()
$1,262
This United Airlines deal was found by Cheapflights users on 9/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/266:30 am -
2 stops19h 55m
Tue 11/36:35 am -
2 stops23h 21m
Deal found 9/19![United Airlines logo]()
$1,273
This ITA Airways deal was found by Cheapflights users on 9/19. 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 ITA Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/237:11 am -
2 stops26h 19m
Tue 11/36:35 am -
2 stops23h 21m
Deal found 9/19![ITA Airways logo]()
$1,426
This KLM deal was found by Cheapflights users on 9/18. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/187:15 am -
2 stops22h 30m
Fri 10/306:35 am -
2 stops22h 15m
Deal found 9/18![KLM logo]()
$1,025
This KLM deal was found by Cheapflights users on 9/18. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/177:15 am -
2 stops22h 15m
Sat 10/316:35 am -
2 stops37h 01m
Deal found 9/18![KLM logo]()
$1,028
This KLM deal was found by Cheapflights users on 9/18. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/177:15 am -
2 stops22h 15m
Fri 10/306:35 am -
2 stops22h 15m
Deal found 9/18![KLM logo]()
$1,075
This United Airlines deal was found by Cheapflights users on 9/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/67:00 am -
2 stops18h 25m
Wed 12/96:35 am -
2 stops23h 26m
Deal found 9/21![United Airlines logo]()
$1,496
This KLM deal was found by Cheapflights users on 9/18. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/161:45 pm -
2 stops19h 45m
Fri 10/306:35 am -
2 stops22h 15m
Deal found 9/18![KLM logo]()
$1,317
Last-minute flights from Seattle to TriesteDiscover last-minute flight deals from Seattle to Trieste. Data last updated September 22, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Trieste. Data last updated September 22, 2026 and is based on user searches.
This KLM deal was found by Cheapflights users on 9/18. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/162:05 pm -
1 stop15h 25m
Sat 10/316:35 am -
2 stops37h 01m
Deal found 9/18![KLM logo]()
$1,023
This KLM deal was found by Cheapflights users on 9/18. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/162:05 pm -
1 stop15h 25m
Fri 10/306:35 am -
2 stops25h 24m
Deal found 9/18![KLM logo]()
$1,070
This KLM deal was found by Cheapflights users on 9/18. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/177:15 am -
2 stops22h 15m
Sat 10/316:35 am -
2 stops37h 01m
Deal found 9/18![KLM logo]()
$1,028
This KLM deal was found by Cheapflights users on 9/18. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/177:15 am -
2 stops22h 15m
Fri 10/306:35 am -
2 stops22h 15m
Deal found 9/18![KLM logo]()
$1,075
This KLM deal was found by Cheapflights users on 9/18. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/182:05 pm -
1 stop19h 25m
Sat 10/316:35 am -
2 stops37h 01m
Deal found 9/18![KLM logo]()
$973
This KLM deal was found by Cheapflights users on 9/18. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/182:05 pm -
1 stop15h 40m
Fri 10/306:35 am -
2 stops25h 24m
Deal found 9/18![KLM logo]()
$1,020
This KAYAK deal was found by Cheapflights users on 9/19. 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 10/2110:50 am -
2 stops18h 10m
Wed 11/43:15 pm -
2 stops29h 45m
Deal found 9/19![Lufthansa logo]()
$1,247
This KAYAK deal was found by Cheapflights users on 9/19. 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 10/212:10 pm -
1 stop23h 15m
Tue 11/33:15 pm -
2 stops29h 45m
Deal found 9/19![Lufthansa logo]()
$1,266
This KAYAK deal was found by Cheapflights users on 9/19. 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 10/253:50 pm -
2 stops42h 40m
Wed 11/43:15 pm -
2 stops29h 45m
Deal found 9/19![Lufthansa logo]()
$1,253
This KAYAK deal was found by Cheapflights users on 9/19. 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.
Mon 10/262:50 pm -
2 stops19h 40m
Wed 11/411:15 am -
2 stops33h 45m
Deal found 9/19![Lufthansa logo]()
$1,264
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 September 22, 2026.
Most accurate provider | Ovago 3 stars |
|---|---|
Most trusted provider | Ovago 3 stars |
Round-trip from | $756 (KLM) |
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 7,457,451 searches. Data last updated September 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
Cheapest round-trip
SeattleTrieste
SEA Seattle/Tacoma Intl - TRS Trieste Ronchi dei Legionari
SEATRS
Seattle/Tacoma Intl
Sun 10/18
7:15 am-2:45 pm
2 stops22h 30m
Trieste Ronchi dei Legionari
Sat 10/31
6:35 am-11:36 am
2 stops37h 01m
$978
SeattleTrieste
SEA Seattle/Tacoma Intl - TRS Trieste Ronchi dei Legionari
SEATRS
Seattle/Tacoma Intl
Sun 10/18
7:15 am-2:45 pm
2 stops22h 30m
Trieste Ronchi dei Legionari
Fri 10/30
6:35 am-8:50 pm
2 stops22h 15m
$1,025
SeattleTrieste
SEA Seattle/Tacoma Intl - TRS Trieste Ronchi dei Legionari
SEATRS
Seattle/Tacoma Intl
Sat 10/17
7:15 am-2:30 pm
2 stops22h 15m
Trieste Ronchi dei Legionari
Sat 10/31
6:35 am-11:36 am
2 stops37h 01m
$1,028
SeattleTrieste
SEA Seattle/Tacoma Intl - TRS Trieste Ronchi dei Legionari
SEATRS
Seattle/Tacoma Intl
Sat 10/17
7:15 am-2:30 pm
2 stops22h 15m
Trieste Ronchi dei Legionari
Fri 10/30
6:35 am-8:50 pm
2 stops22h 15m
$1,075
SeattleTrieste
SEA Seattle/Tacoma Intl - TRS Trieste Ronchi dei Legionari
SEATRS
Seattle/Tacoma Intl
Thu 11/5
7:45 am-4:40 pm
3 stops23h 55m
Trieste Ronchi dei Legionari
Thu 11/12
7:15 pm-5:00 pm
3 stops30h 45m
$1,262
SeattleTrieste
SEA Seattle/Tacoma Intl - TRS Trieste Ronchi dei Legionari
SEATRS
Seattle/Tacoma Intl
Mon 10/26
6:30 am-10:25 am
2 stops19h 55m
Trieste Ronchi dei Legionari
Tue 11/3
6:35 am-8:56 pm
2 stops23h 21m
$1,273
SeattleTrieste
SEA Seattle/Tacoma Intl - TRS Trieste Ronchi dei Legionari
SEATRS
Seattle/Tacoma Intl
Fri 10/16
1:45 pm-6:30 pm
2 stops19h 45m
Trieste Ronchi dei Legionari
Fri 10/30
6:35 am-8:50 pm
2 stops22h 15m
$1,317
SeattleTrieste
SEA Seattle/Tacoma Intl - TRS Trieste Ronchi dei Legionari
SEATRS
Seattle/Tacoma Intl
Fri 10/23
7:11 am-6:30 pm
2 stops26h 19m
Trieste Ronchi dei Legionari
Tue 11/3
6:35 am-8:56 pm
2 stops23h 21m
$1,426
Quickest round-trip
SeattleTrieste
SEA Seattle/Tacoma Intl - TRS Trieste Ronchi dei Legionari
SEATRS
Seattle/Tacoma Intl
Sun 12/6
7:00 am-10:25 am
2 stops18h 25m
Trieste Ronchi dei Legionari
Wed 12/9
6:35 am-9:01 pm
2 stops23h 26m
$1,496
Sorted by cheapest first
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 September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Seattle-Trieste flights, users find the pricing of Ovago to be most consistent on Cheapflights vs. Ovago Users can find the same prices on Seattle-Trieste flight deals on Cheapflights vs. Ovago >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 Ovago the most. Ovago 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.
SEA-TRS
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.
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.
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