$371 Find Cheap Flights from Trieste to the United States - Compare and Save

1 adult
1 adult, Economy, 0 bags

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Cheap Flights from Trieste to the United States

Cheapest round-trip prices found by our users on KAYAK in the last 5 days
New York
New York1 stop$531
Los Angeles
Los Angeles1 stop$554
Chicago
Chicago1 stop$585
San Francisco
San Francisco1 stop$544
Miami
Miami1 stop$589
Boston
Boston1 stop$546
Denver
Denver1 stop$962
Seattle
Seattle1 stop$914
Atlanta
Atlanta2 stops$938
Tampa
Tampa3 stops$1,123
New York
New York1 stop$531
Los Angeles
Los Angeles1 stop$554
Chicago
Chicago1 stop$585
San Francisco
San Francisco1 stop$544
Miami
Miami1 stop$589
Boston
Boston1 stop$546
Denver
Denver1 stop$962
Seattle
Seattle1 stop$914
Atlanta
Atlanta2 stops$938
Tampa
Tampa3 stops$1,123
Booking Insights

KAYAK's insights & trends for Trieste to the United States flights

Get data-powered insights and trends into flights from Trieste to the United States to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from Trieste to the United States?

The cheapest month for flights from Trieste to the United States is November, when tickets cost $531 (return) on average. On the other hand, the most expensive months are June and August, when the average cost of round-trip tickets is $876 and $825 respectively.

Good to know

Low season

August

Cheapest flight

$371
Best time to beat the crowds but there is an average 14% increase in price.
Most popular time to fly with an average 9% increase in price.
Flight from Trieste to Newark Liberty Airport

FAQs - booking United States flights

  • How does KAYAK find such low prices on flights from Trieste to the United States?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Trieste to the United States.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Trieste to the United States?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Trieste to the United States is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Trieste to the United States?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Trieste to the United States with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Trieste to the United States?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Trieste to the United States up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airlines flying from Trieste to the United States

 
Need help choosing which airline to fly with from Trieste to the United States? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
6.8
LufthansaOverall score based on 8204 reviews
6.5Entertainment
7.0Boarding
7.6Crew
6.8Comfort
6.3Food
Airline reviews

The seats on Lufthansa’s international business class on the A350-900 is the worst product in the market. Our chief purser was AMAZING though. She is the best FA I have had in many years.

4.0 OkayRob, Aug 2026
Read more Lufthansa reviews

The seats on Lufthansa’s international business class on the A350-900 is the worst product in the market. Our chief purser was AMAZING though. She is the best FA I have had in many years.

I was never able to use this flight. I booked my flight through KAYAK, using cheapfaresflights, and the agency did not book the ticket correctly. When I went to check in for my flight in Rome, my details had changed. My name was incorrect , and the itinerary was not what I had paid for. I was unable to board the flight and I had to purchase a second ticket at considerable expense. Unfortunately, no one at KAYAK or Cheapfaresflights was able to help me. They both shifted the blame on United Airlines, United Airlines was able to provide me a full detail that the error occurred on the travel agencies side. I consider this fraud and will pursue it further.

This review is based on 2 things: 1. The lack of hygiene on the plane. 2. William - the head flight attendant. The lack of cleanliness on the plane upon arrival was appalling. Being given a sanitizing wipe upon boarding of the plane is shocking when you consider the cost of a business class flight. UA expects me to do their job and clean all the bread, food and debris left from previous guests. Does this sound normal to you. The seat, the food table and the sides were full of crumbs, chocolate and dirt. When I told the flight attendant they just gave me more wipes so I could clean it myself. Secondly, William the business cabin head flight attendant was so busy flirting with a couple in the front that his attention to the other guests was minimal. He continuously asked them if they were ok or if they needed anything and it didn’t matter if the rest of us needed anything. And if you are the lead attendant shouldn’t you be checking if the bathrooms in business class are clean and needing toilet paper. There were 2 bathrooms in business. Halfway through the flight the first bathroom was closed and the second bathroom was dirty and had no toilet paper one hour and a half before the flight landed. He needs additional training on prioritizing things. He should care less about flirting and more about his work

Liked the flight being almost on time (airport issues created a delay). Disliked the issue printing tag bags on the kiosk and having to wait for an hour on like to drop my bags.

The plane was very clean. The bathroom was clean as well. The land crew were very polite and informative and helpful. They informed me that there is a long way and challenging to go from international terminal to national terminal and in addition to getting my suitcases and going through customs and dropping them again for my second leg of trip which was San Francisco to Los Angeles . I have left knee issue and had a recent fall with aching muscles all over, the land crew suggested wheelchair help for me, God bless her. If I did not have help, I could not make it to my last terminal. Thank you UNITED AIRLINE!

The flight was cancelled due to tech problem with the plane

Courtesy of waitress. Could improve on time management and check-in

Got auestioned multiple times by gate agents. They ran out of chicken for the first meal. Slept pretty good on it and had good entertainment.

The flight leaving mxp was late I lost connection in ORD Changing flight was hectic and messy, overnight and meals vouchers very poor

seats in economy are just uncomfortable due to the amount of space this, or any airline provides. Until the government sets minimum standards for comfort this will continue.

What occurred during this flight was far beyond an ordinary inconvenience or dissatisfaction with the onboard service. There were multiple failures involving the aircraft’s passenger-seat systems, the ability to summon cabin crew, sanitation, cabin crew responsiveness, food and beverage service, and the overall standard of passenger care. The circumstances were particularly serious because I am diabetic, and during the flight I experienced a situation in which I needed assistance while essential passenger-control functions at our seats were not working. I am requesting that ITA Airways treat this as a formal complaint requiring individual investigation, rather than responding with a generic customer-service apology. 1. All three seats had significant equipment failures Seat 46F: The entertainment screen was completely non-functional for the entire flight. Seats 46G and 46H: The screens themselves displayed content, but the following controls did not function: Cabin-light control Flight-attendant call button Flight-tracker button These were not merely entertainment-system failures. The malfunctioning controls affected our ability to control the lighting at our seats and, more importantly, our ability to summon a flight attendant when assistance was required. I specifically request that ITA investigate the maintenance records for the aircraft and these specific seats and determine whether these defects were known before departure, reported during the flight, or documented by the cabin crew. 2. The defective equipment directly affected my ability to manage my diabetes I am diabetic and require insulin. Because the cabin-light controls at our seats were not functioning, I was unable to properly illuminate my seating area when I needed to administer my insulin during the flight. More seriously, when my blood sugar became low, I was unable to use the attendant-call button to request assistance because the button was not functioning. This transformed what might ordinarily be considered an entertainment-system problem into a much more serious passenger-care issue. I was on a long transatlantic flight, unable to properly illuminate my seating area when necessary and unable to summon a member of the cabin crew through the designated call system. 3. My daughter repeatedly attempted to obtain assistance when my blood sugar was low When my blood sugar became low, I needed juice or another rapidly available source of carbohydrate. Because I could not use the attendant-call button, I sent my daughter to ask the cabin crew for juice. She made multiple attempts to obtain assistance. Despite these repeated attempts, the cabin crew did not appropriately respond to her request. After multiple attempts from my daughter, the curtain was closed. I ultimately had to obtain candy from passengers seated nearby because I could not obtain the assistance I was seeking from the cabin crew. I consider this one of the most serious incidents on the flight. I am not suggesting that cabin crew were required to provide medical treatment. However, when a passenger is seeking assistance because of low blood sugar—particularly when that passenger’s designated call button is not functioning—I believe a reasonable standard of passenger care requires the request to be acknowledged and handled appropriately. I therefore request that ITA investigate this incident specifically, including: Which crew members were assigned to our cabin/section; Whether any crew member observed my daughter requesting assistance; Whether any crew report was made concerning this incident; Whether the crew knew that the attendant-call buttons at our seats were not functioning; and What ITA’s procedures require when a passenger reports that they are experiencing low blood sugar or otherwise needs assistance. 4. The circumstances caused significant distress and interfered with my ability to manage my condition.The combination of the defective lighting controls, inability to use the attendant-call system, and failure to obtain timely assistance caused me significant distress.I was particularly distressed because I was unable to properly manage my medical needs in the manner I normally would during a long flight. My blood sugar subsequently remained elevated for an extended period. I believe the prolonged stress and circumstances surrounding this incident contributed to the difficulty I experienced managing my blood sugar during the flight. I am documenting this because I do not want ITA to reduce this complaint to a complaint about an entertainment screen. The equipment failures directly affected my ability to manage my medical needs and obtain assistance. 5. Unacceptable restroom conditions. One restroom was completely out of service for the entire flight.The remaining restrooms were extremely dirty with visible urine stains and no toilet paper. 6. Unprofessional and dismissive cabin crew behavior. Throughout the flight, the attendants were unpleasant and appeared irritated

The cleanliness of the Business class continues to disappoint. There was food on the floor when I boarded.

My son was served a muffin which had broken pieces of glass in it. Thank god he didnt swallow them and spit them out. i did let the crew member know and took pictures but nothing they could do. This could have been a very dangerous situation.

Sitting at Logan on the taxiway for 90 mins waiting for a gate after an 8 hour flight is unacceptable. Logan and delta need to do better

The flight was long and offered very little comfort. The seats were exceptionally small and quite uncomfortable, making it difficult to rest on a long journey. The onboard meals were below expectations, although the cabin crew was excellent throughout the flight—professional, attentive, and courteous. I understand the commercial pressures airlines face, but maximizing capacity by reducing seat size and comfort has become an industry-wide concern. While many travelers will continue to tolerate these conditions out of necessity, an increasing number of passengers will choose alternative airlines whenever possible in search of a more comfortable travel experience. Investing in passenger comfort is not only appreciated—it is also an important factor in long-term customer loyalty.

Worst airline. Nine hours late. Checkin agent was not helpful at all.

One bathroom wasn’t working and the other bathroom faucet wasn’t working.

Horrible. I was on flight AZ620 from Rome to LA. I paid over $4k for my business class seat and had a horrible experience. The WiFi was not connected for the entire flight and instead of being transparent with the passengers, the staff passed out WiFi vouchers and failed to let us know that the Wifi did not and would not work for the entire flight. Much worse is the terrible treatment from the manager of the flight attendant staff. I got up from my business class seat to use the restroom meant for this section. The flight attendant manager (I didn't catch her name but later learned she was the manager from another employee) started yelling at me that I couldn't use the restroom. I thought maybe it was busy. Then another flight attendant came to my seat and said that her manager thinks I'm not in business class, but I should let her know I am so I can use the restroom. I stood up again and before I reached the restroom, the manager was already yelling at me again to use the restroom in the back! She was judging me based solely on my appearance and assumed I wasn't business class. I had to interrupt her constant yelling to tell her "I am business class." She was racist and rude. I travel constantly for work, but moving forward I am never going to spend my money on an ITA airway flight again. Thanks to this manager, you lost a customer.

Top notch re cleanliness, comfort, operational. Attendants attentive, cheerful, courteous and professional. An unusually high-grade experience all around.

They are nice personal and as sky silver medaglia member love Delta air and partner

Everything you need to know for your flight from Trieste to the United States

Information on your arrival and departure airports