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Cheap flights from Illinois to Trieste from $326

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to Trieste departing on 9/25. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Illinois to Trieste

Cheap round-trip flights

Enter your travel dates to find the best prices.
ITA Airways Logo
3:00 pm - 10:55 pm
ORD
-
TRS
24h 55m
1 stop
ITA Airways Logo
6:35 am - 1:10 pm
TRS
-
ORD
13h 35m
1 stop
$741ITA Airways
Sun, Aug 16 - Sun, Aug 23
ITA Airways Logo
3:00 pm - 6:30 pm
ORD
-
TRS
20h 30m
1 stop
ITA Airways Logo
7:15 pm - 1:10 pm
TRS
-
ORD
24h 55m
1 stop
$755ITA Airways
Sun, Aug 23 - Sat, Aug 29
ITA Airways Logo
3:00 pm - 10:25 am
ORD
-
TRS
12h 25m
1 stop
ITA Airways Logo
6:35 am - 1:10 pm
TRS
-
ORD
13h 35m
1 stop
$769ITA Airways
Thu, Aug 13 - Thu, Aug 20
Multiple Airlines Logo
11:25 am - 10:35 pm
ORD
-
TRS
28h 10m
2 stops
Multiple Airlines Logo
11:20 am - 9:40 am
TRS
-
ORD
29h 20m
2 stops
$774Multiple Airlines
Tue, Sep 8 - Tue, Sep 15
Multiple Airlines Logo
8:10 pm - 10:35 pm
ORD
-
TRS
19h 25m
2 stops
Multiple Airlines Logo
11:20 am - 9:40 am
TRS
-
ORD
29h 20m
2 stops
$775Multiple Airlines
Tue, Sep 8 - Tue, Sep 15
Multiple Airlines Logo
8:10 pm - 10:35 pm
ORD
-
TRS
19h 25m
2 stops
Multiple Airlines Logo
11:20 am - 9:40 am
TRS
-
ORD
29h 20m
2 stops
$776Multiple Airlines
Tue, Sep 8 - Tue, Sep 15
ITA Airways Logo
3:00 pm - 10:55 pm
ORD
-
TRS
24h 55m
1 stop
ITA Airways Logo
6:35 am - 1:10 pm
TRS
-
ORD
13h 35m
1 stop
$777ITA Airways
Thu, Aug 13 - Thu, Aug 20
ITA Airways Logo
3:00 pm - 6:30 pm
ORD
-
TRS
20h 30m
1 stop
ITA Airways Logo
6:35 am - 1:10 pm
TRS
-
ORD
13h 35m
1 stop
$799ITA Airways
Tue, Sep 8 - Tue, Sep 15
ITA Airways Logo
3:00 pm - 6:30 pm
ORD
-
TRS
20h 30m
1 stop
ITA Airways Logo
6:35 am - 1:10 pm
TRS
-
ORD
13h 35m
1 stop
$802ITA Airways
Tue, Sep 8 - Tue, Sep 15
ITA Airways Logo
3:00 pm - 10:25 am
ORD
-
TRS
12h 25m
1 stop
ITA Airways Logo
6:35 am - 1:10 pm
TRS
-
ORD
13h 35m
1 stop
$804ITA Airways
Wed, Aug 19 - Sun, Aug 23

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ITA Airways flights from Illinois to Trieste

Our best ITA Airways deals on Illinois to Trieste flight tickets
ITA Airways
Aug 16
ORD3:00 pmChicago O'Hare Intl
24h 55m
1 stop
TRS10:55 pmTrieste Ronchi dei Legionari
Aug 23
TRS6:35 amTrieste Ronchi dei Legionari
13h 35m
1 stop
ORD1:10 pmChicago O'Hare Intl
$741
ITA Airways
Aug 23
ORD3:00 pmChicago O'Hare Intl
20h 30m
1 stop
TRS6:30 pmTrieste Ronchi dei Legionari
Aug 29
TRS7:15 pmTrieste Ronchi dei Legionari
24h 55m
1 stop
ORD1:10 pmChicago O'Hare Intl
$755
ITA Airways
Aug 13
ORD3:00 pmChicago O'Hare Intl
12h 25m
1 stop
TRS10:25 amTrieste Ronchi dei Legionari
Aug 20
TRS6:35 amTrieste Ronchi dei Legionari
13h 35m
1 stop
ORD1:10 pmChicago O'Hare Intl
$769

KLM flights from Illinois to Trieste

Our best KLM deals on Illinois to Trieste flight tickets
KLM
Aug 16
ORD1:44 pmChicago O'Hare Intl
21h 46m
2 stops
TRS6:30 pmTrieste Ronchi dei Legionari
Aug 23
TRS6:35 amTrieste Ronchi dei Legionari
24h 22m
2 stops
ORD11:57 pmChicago O'Hare Intl
$887
KLM
Aug 13
ORD5:57 pmChicago O'Hare Intl
21h 58m
2 stops
TRS10:55 pmTrieste Ronchi dei Legionari
Aug 20
TRS6:35 amTrieste Ronchi dei Legionari
16h 42m
2 stops
ORD4:17 pmChicago O'Hare Intl
$937
KLM
Aug 22
MDW1:51 pmChicago Midway
21h 39m
2 stops
TRS6:30 pmTrieste Ronchi dei Legionari
Sep 5
TRS6:35 amTrieste Ronchi dei Legionari
23h 01m
2 stops
MDW10:36 pmChicago Midway
$973

momondo Fare Finder

 
Customize your flight search to find flights from Illinois 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, momondo users made 832,500 searches. Data last updated July 29, 2026.
Use the filters below to find and compare flights from Illinois to Trieste that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoTrieste

ORD - TRS

ORDTRS

Chicago O'Hare Intl

Sun 8/16

3:00 pm-10:55 pm

1 stop24h 55m

Trieste Ronchi dei Legionari

Sun 8/23

6:35 am-1:10 pm

1 stop13h 35m

$741

ChicagoTrieste

ORD - TRS

ORDTRS

Chicago O'Hare Intl

Sun 8/23

3:00 pm-6:30 pm

1 stop20h 30m

Trieste Ronchi dei Legionari

Sat 8/29

7:15 pm-1:10 pm

1 stop24h 55m

$755
Quickest round-trip

ChicagoTrieste

ORD - TRS

ORDTRS

Chicago O'Hare Intl

Thu 8/13

3:00 pm-10:25 am

1 stop12h 25m

Trieste Ronchi dei Legionari

Thu 8/20

6:35 am-1:10 pm

1 stop13h 35m

$769

ChicagoTrieste

ORD - TRS

ORDTRS

Chicago O'Hare Intl

Tue 9/8

11:25 am-10:35 pm

2 stops28h 10m

Trieste Ronchi dei Legionari

Tue 9/15

11:20 am-9:40 am

2 stops29h 20m

$774

ChicagoTrieste

ORD - TRS

ORDTRS

Chicago O'Hare Intl

Tue 9/8

8:10 pm-10:35 pm

2 stops19h 25m

Trieste Ronchi dei Legionari

Tue 9/15

11:20 am-9:40 am

2 stops29h 20m

$775

ChicagoTrieste

ORD - TRS

ORDTRS

Chicago O'Hare Intl

Tue 9/8

8:10 pm-10:35 pm

2 stops19h 25m

Trieste Ronchi dei Legionari

Tue 9/15

11:20 am-9:40 am

2 stops29h 20m

$776

ChicagoTrieste

ORD - TRS

ORDTRS

Chicago O'Hare Intl

Thu 8/13

3:00 pm-10:55 pm

1 stop24h 55m

Trieste Ronchi dei Legionari

Thu 8/20

6:35 am-1:10 pm

1 stop13h 35m

$777

ChicagoTrieste

ORD - TRS

ORDTRS

Chicago O'Hare Intl

Tue 9/8

3:00 pm-6:30 pm

1 stop20h 30m

Trieste Ronchi dei Legionari

Tue 9/15

6:35 am-1:10 pm

1 stop13h 35m

$799

ChicagoTrieste

ORD - TRS

ORDTRS

Chicago O'Hare Intl

Tue 9/8

3:00 pm-6:30 pm

1 stop20h 30m

Trieste Ronchi dei Legionari

Tue 9/15

6:35 am-1:10 pm

1 stop13h 35m

$802

ChicagoTrieste

ORD - TRS

ORDTRS

Chicago O'Hare Intl

Wed 8/19

3:00 pm-10:25 am

1 stop12h 25m

Trieste Ronchi dei Legionari

Sun 8/23

6:35 am-1:10 pm

1 stop13h 35m

$804

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Trieste from

How to get the cheapest flight ticket from Illinois 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

What is the cheapest airline that flies from Illinois to Trieste Ronchi dei Legionari?

KLM and Lufthansa are the most popular carriers operating from Illinois to Trieste Ronchi dei Legionari

What airlines fly to Trieste?

Turkish Airlines, United Airlines and Lufthansa are the top three most popular airlines that fly to Trieste from Illinois according to our data. Turkish Airlines is the first choice among our users, with 29% of people opting to fly with this airline when traveling to Trieste. Keep in mind that there are 10 different airlines that fly to Trieste on a routine basis, so you have a few additional options to choose from.

Cheap Illinois to Trieste flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Illinois to Trieste

Fastest flight time

12h 25m

Direct flights

None
The fastest flight from Illinois to Trieste takes 12h 25m
There are no direct flights from Illinois to Trieste. There are no popular flight routes from Illinois to Trieste.
Search flight deals

Frequently asked questions about flying from Illinois to Trieste

  • When did momondo last update prices for flights from Illinois to Trieste Ronchi dei Legionari Airport?

    Prices for flights from Illinois to Trieste Ronchi dei Legionari Airport are updated daily.

  • How old do you have to be to fly from Illinois to Trieste Ronchi dei Legionari Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Illinois 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.

Traveling to a place near Trieste?

Book flights to Trieste if you plan to visit one of these locations
Udine
Grado

Why use momondo?

Why should I use momondo to find a flight deal from Illinois to Trieste?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Illinois to Trieste for you.

Can I find flights from Illinois to Trieste with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Illinois to Trieste flights to just show those with flexible booking policies.

How can momondo help me find flights from Illinois to Trieste?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Illinois to Trieste.

I’m not ready to book a flight from Illinois to Trieste right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Illinois to Trieste now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Trieste and let you know when they change.

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Fly your favorite airline to Trieste

Airlines are sorted and displayed according to clicks in the past 7 days on momondo
Turkish Airlines
United Airlines
Lufthansa
Scandinavian Airlines
SWISS
TAP AIR PORTUGAL
ITA Airways
Aer Lingus
British Airways
American Airlines