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$557+ Cheap flights from Trieste (TRS) to Illinois

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 8/23. Fares are subject to change and may not be available on all flights or dates of travel.
TRS — ORD
Aug 5 — Aug 121
Tue 8/5
Tue 8/12
1 adult, Economy
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Cheap flight deals from Trieste to Illinois

Keep the following information in mind while searching for Trieste to Illinois flight deals. Data was last updated July 31, 2025.

Round-trip from

$557
(lol.travel)
From Trieste Ronchi dei Legionari to Illinois
Search Deals

Find flight deals from Trieste to Illinois

Cheapest flights from Trieste to Illinois
Explore the most affordable flight options available from Trieste to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 31, 2025.

This lol.travel deal was found by Cheapflights users on 7/30. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/2311:15 amTRS - ORD
1 stop32h 55mITA Airways
Mon 9/13:00 pmORD - TRS
1 stop20h 30mITA Airways
Deal found 7/30$557
This Booking.com deal was found by Cheapflights users on 7/31. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/286:30 amTRS - ORD
1 stop20h 25mLufthansa
Tue 9/210:30 pmORD - TRS
1 stop17h 05mLufthansa
Deal found 7/31$585
This Mytrip deal was found by Cheapflights users on 7/30. 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.
Sat 8/236:30 amTRS - ORD
2 stops15h 34mMultiple Airlines
Mon 9/15:55 pmORD - TRS
2 stops21h 30mMultiple Airlines
Deal found 7/30$765
This Expedia deal was found by Cheapflights users on 7/31. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/166:35 amTRS - ORD
2 stops16h 38mKLM
Wed 8/202:00 pmORD - TRS
2 stops21h 30mKLM
Deal found 7/31$1,028

Cheapflights Fare Finder

 
Customize your flight search to find flights from Trieste to Illinois 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 2,558,603 searches. Data last updated July 31, 2025.
Use the filters below to find and compare flights from Trieste to Illinois that are best for you.

Fly from

Trieste

Fly to

Illinois

Route

Depart

Return

Price

TriesteChicago

TRS - ORD

TRSORD

Trieste Ronchi dei Legionari

Sat 8/23

11:15 am-1:10 pm

1 stop32h 55m

Chicago O'Hare Intl

Mon 9/1

3:00 pm-6:30 pm

1 stop20h 30m

$557

TriesteChicago

TRS - ORD

TRSORD

Trieste Ronchi dei Legionari

Thu 8/28

6:30 am-7:55 pm

1 stop20h 25m

Chicago O'Hare Intl

Tue 9/2

10:30 pm-10:35 pm

1 stop17h 05m

$585

TriesteChicago

TRS - ORD

TRSORD

Trieste Ronchi dei Legionari

Sat 8/23

6:30 am-3:04 pm

2 stops15h 34m

Chicago O'Hare Intl

Mon 9/1

5:55 pm-10:25 pm

2 stops21h 30m

$765

TriesteChicago

TRS - ORD

TRSORD

Trieste Ronchi dei Legionari

Sat 8/16

6:35 am-4:13 pm

2 stops16h 38m

Chicago O'Hare Intl

Wed 8/20

2:00 pm-6:30 pm

2 stops21h 30m

$1,028

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/30

Best time to book a flight from Trieste to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Trieste with our price prediction graph.
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.

Cheapflights Insights

Everything you need to know about your flight from Trieste to Illinois

What is the cheapest month to book a flight from Trieste to Illinois?

Currently, August is the cheapest month in which you can book a flight from Trieste to Illinois (average of $245). Flying from Trieste to Illinois in March is currently the most expensive (average of $321). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated July 31, 2025.
Read through reviews of airlines operating flights from Trieste to Illinois, such as KLM, Lufthansa, and ITA Airways. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.8
Good
1,383 reviews

Comfort

7.7

Boarding

7.8

Crew

8.4

Entertainment

7.1

Overall

7.8

Food

7.3

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
KLM
7.8
Good
1,383 reviews
KLM
7.8
Good
1,383 reviews

Comfort

7.7

Boarding

7.8

Crew

8.4

Entertainment

7.1

Overall

7.8

Food

7.3

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
Lufthansa
6.8
Okay
7,275 reviews
KLM
7.8
Good
1,383 reviews

Comfort

7.7

Boarding

7.8

Crew

8.4

Entertainment

7.1

Overall

7.8

Food

7.3

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
ITA Airways
6.7
Okay
1,011 reviews
KLM
7.8
Good
1,383 reviews

Comfort

7.7

Boarding

7.8

Crew

8.4

Entertainment

7.1

Overall

7.8

Food

7.3

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

Related info for your journey

Find useful and relevant information for your journey from Trieste to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Trieste to Illinois?

    Trieste Ronchi dei Legionari (TRS), located 18.2 mi from the city center, is the airport you fly out of when you book flights from Trieste to Illinois.

  • Can I find deals for flights from Trieste to Illinois that include hotel bookings?

    Yes. In addition to deals on Trieste to Illinois flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Trieste to Illinois?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Trieste to Illinois.

  • Can I find deals for business class flights from Trieste to Illinois?

    Yes. Cheapflights offers flight deals from Trieste to Illinois by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Trieste to Illinois?

    Currently, August is the cheapest month in which you can book a flight from Trieste to Illinois (average of $245). Flying from Trieste to Illinois in March is currently the most expensive (average of $321). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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