The cheapest times to fly from TRS to SEA are

  • January 8th to March 25th
  • April 30th to June 24th
  • October 15th to December 9th (except the week of October 29th)

based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from TRS to SEA is early to mid May. Prices can be as high as $1692 for Saturday flights during mid August, or as low as $729 for Tuesday flights around early to mid May.


When to Fly to Seattle

Flying from Trieste (TRS) to Seattle, WA (SEA) will usually cost between $826 to $1351 per person if booking more than four weeks in advance. On average the very cheapest time to fly is early to mid May with an average ticket price of $823. Due to high demand the most expensive time to fly is mid August, with an average price of $1463. Planning your trip to low-cost times can easily save you $640 on economy flights and even more on first-class flights. Generally, any price below $928 can be considered a good price for a round-trip TRS to SEA flight.

See below for a graph of average weekly prices for the TRS to SEA route. All prices are for round-trip tickets in USD.

TRS to SEA Flight Prices

Compared to other flights, the TRS to SEA flight is priced close to the average and costs about as much as the average flight leaving from Trieste. The average price per mile (for a direct flight) is $0.11, which is far below average.


Flight Prices by Day of the Week

Tuesday is usually the cheapest day to depart and return on this flight. Saturdays are the most expensive days to fly out or take a return trip. Selecting flights on the least expensive days could save you up to $115 (8%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Tuesday and returning a week later will cost an average of $967. Return trip prices are from the SEA to TRS flight, and often highlight the quality of our data in showing the same trend.

Departing Prices by Day

Departure Day Prices

Return Trip Prices by Day

Return Day Prices


Nonstop Flights and Layovers

Travelers looking to fly from TRS to SEA can generally find a 1-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 10 hour 48 minutes may not be realistic.


Alternative Nearby Airports

Champion Traveler tells you which airports are nearby and whether tickets might be cheaper alternative airports nearby. Sometimes it’s worth it to fly into a closer airport and then commute to your destination. Remember that there is not usually a nonstop flight from TRS to SEA while comparing.

Destination alternative #1: Portland International Airport (PDX) in Portland, OR

  • 129 miles (208 km) away from SEA
  • Usually 5.71% less expensive than SEA
  • 1-layover flights available

See TRS to PDX flights


Flight Hacking TRS to SEA

Flight hacking is when you book two tickets instead of a layover, sometimes with different airlines. You will need to either bring only a carry-on bag (highly recommended) or leave yourself plenty of time to go through security again. Flight hacking is completely allowed, but airlines don’t always tell you the cheapest way to get from TRS to SEA — but Champion Traveler does!

Hack #1: Munich (TRS > MUC > SEA)

  • Price for both tickets: $692
  • Average savings: $236 (25.43%)

See TRS to FRA flights

Hack #2: Frankfurt (TRS > FRA > SEA)

  • Price for both tickets: $705
  • Average savings: $224 (24.08%)

See TRS to MUC flights

Hack #3: Los Angeles, CA (TRS > LAX > SEA)

  • Price for both tickets: $747
  • Average savings: $182 (19.56%)

See TRS to LAX flights


Flight Questions Answered

Still have questions about flying from TRS to SEA? We’ve got answers.

Which airlines fly this route?

You can find 14 major airlines flying this route most often: Adria, Air Canada, Air France, Alaska, Alitalia, British Airways, Condor, Delta, Icelandair, KLM, Lufthansa, Singapore Airlines, Tap Air Portugal, United, and potentially more during busy seasons.

How far away is it from Seattle/Tacoma International Airport to Trieste Airport?

The distance between the two airports is roughly 5458 miles or 8784 kilometers.

How long does it take to fly from TRS to SEA?

The real-world flight time for a nonstop TRS to SEA flight is about 10 hour 48 minutes.

How many flights go between Trieste and Seattle, WA?

It depends on the day of the week and the date, but a typical day might have around 13 available flights from TRS to SEA.


Airport Location Info


Departing Airport

Origination codeTRS
Origination airport nameTrieste Airport

Return Airport

Destination codeSEA
Destination airport nameSeattle/Tacoma International Airport
CitySeattle, WA
Countrythe United States


Other Resources

Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.