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Cheap flights from Illinois to Trieste from $377

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 7/10. 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.
Multiple Airlines Logo
7:15 am - 2:05 pm
ORD
-
TRS
23h 50m
2 stops
Multiple Airlines Logo
6:25 am - 2:55 pm
TRS
-
ORD
15h 30m
2 stops
$865Multiple Airlines
Thu, Nov 12 - Thu, Nov 26
Multiple Airlines Logo
4:00 pm - 2:05 pm
ORD
-
TRS
15h 05m
2 stops
Multiple Airlines Logo
6:25 am - 4:00 pm
TRS
-
ORD
16h 35m
2 stops
$874Multiple Airlines
Thu, Nov 12 - Thu, Nov 26
Lufthansa Logo
10:30 pm - 10:25 pm
ORD
-
TRS
16h 55m
1 stop
Lufthansa Logo
2:50 pm - 12:55 pm
TRS
-
ORD
29h 05m
1 stop
$879Lufthansa
Mon, Jul 20 - Mon, Jul 27
Multiple Airlines Logo
4:20 pm - 2:05 pm
ORD
-
TRS
14h 45m
1 stop
Multiple Airlines Logo
6:25 am - 2:55 pm
TRS
-
ORD
15h 30m
2 stops
$886Multiple Airlines
Thu, Nov 12 - Thu, Nov 26
Multiple Airlines Logo
10:35 pm - 10:45 pm
ORD
-
TRS
17h 10m
1 stop
Multiple Airlines Logo
6:25 am - 4:00 pm
TRS
-
ORD
16h 35m
2 stops
$888Multiple Airlines
Thu, Nov 12 - Thu, Nov 26
Lufthansa Logo
4:20 pm - 2:05 pm
ORD
-
TRS
14h 45m
1 stop
Lufthansa Logo
2:45 pm - 8:05 pm
TRS
-
ORD
12h 20m
1 stop
$891Lufthansa
Thu, Nov 12 - Thu, Nov 26
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
$894ITA Airways
Sun, Jul 19 - Sat, Aug 22
Lufthansa Logo
4:05 pm - 1:45 pm
ORD
-
TRS
14h 40m
1 stop
Lufthansa Logo
2:45 pm - 7:55 pm
TRS
-
ORD
12h 10m
1 stop
$913Lufthansa
Tue, Jul 21 - Sat, Aug 22
KLM Logo
1:18 pm - 2:30 pm
MDW
-
TRS
18h 12m
2 stops
KLM Logo
6:35 am - 6:25 pm
TRS
-
MDW
18h 50m
2 stops
$966KLM
Tue, Jul 21 - Tue, Jul 28
KLM Logo
12:41 pm - 2:30 pm
MDW
-
TRS
18h 49m
2 stops
KLM Logo
3:15 pm - 6:25 pm
TRS
-
MDW
34h 10m
2 stops
$1,023KLM
Mon, Jul 20 - Mon, Jul 27

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Lufthansa flights from Illinois to Trieste

Our best Lufthansa deals on Illinois to Trieste flight tickets
Lufthansa
Jul 20
ORD10:30 pmChicago O'Hare Intl
16h 55m
1 stop
TRS10:25 pmTrieste Ronchi dei Legionari
Jul 27
TRS2:50 pmTrieste Ronchi dei Legionari
29h 05m
1 stop
ORD12:55 pmChicago O'Hare Intl
$879
Lufthansa
Nov 12
ORD4:20 pmChicago O'Hare Intl
14h 45m
1 stop
TRS2:05 pmTrieste Ronchi dei Legionari
Nov 26
TRS2:45 pmTrieste Ronchi dei Legionari
12h 20m
1 stop
ORD8:05 pmChicago O'Hare Intl
$891
Lufthansa
Jul 21
ORD4:05 pmChicago O'Hare Intl
14h 40m
1 stop
TRS1:45 pmTrieste Ronchi dei Legionari
Aug 22
TRS2:45 pmTrieste Ronchi dei Legionari
12h 10m
1 stop
ORD7:55 pmChicago O'Hare Intl
$913

ITA Airways flights from Illinois to Trieste

Our best ITA Airways deals on Illinois to Trieste flight tickets
ITA Airways
Jul 19
ORD3:00 pmChicago O'Hare Intl
20h 30m
1 stop
TRS6:30 pmTrieste Ronchi dei Legionari
Aug 22
TRS7:15 pmTrieste Ronchi dei Legionari
24h 55m
1 stop
ORD1:10 pmChicago O'Hare Intl
$894
ITA Airways
Jul 18
ORD3:00 pmChicago O'Hare Intl
16h 30m
1 stop
TRS2:30 pmTrieste Ronchi dei Legionari
Aug 22
TRS6:35 amTrieste Ronchi dei Legionari
13h 35m
1 stop
ORD1:10 pmChicago O'Hare Intl
$944
ITA Airways
Sep 1
ORD3:00 pmChicago O'Hare Intl
12h 25m
1 stop
TRS10:25 amTrieste Ronchi dei Legionari
Sep 8
TRS6:35 amTrieste Ronchi dei Legionari
13h 35m
1 stop
ORD1:10 pmChicago O'Hare Intl
$961

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 June 11, 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

Thu 11/12

7:15 am-2:05 pm

2 stops23h 50m

Trieste Ronchi dei Legionari

Thu 11/26

6:25 am-2:55 pm

2 stops15h 30m

$865

ChicagoTrieste

ORD - TRS

ORDTRS

Chicago O'Hare Intl

Thu 11/12

4:00 pm-2:05 pm

2 stops15h 05m

Trieste Ronchi dei Legionari

Thu 11/26

6:25 am-4:00 pm

2 stops16h 35m

$874

ChicagoTrieste

ORD - TRS

ORDTRS

Chicago O'Hare Intl

Mon 7/20

10:30 pm-10:25 pm

1 stop16h 55m

Trieste Ronchi dei Legionari

Mon 7/27

2:50 pm-12:55 pm

1 stop29h 05m

$879

ChicagoTrieste

ORD - TRS

ORDTRS

Chicago O'Hare Intl

Thu 11/12

4:20 pm-2:05 pm

1 stop14h 45m

Trieste Ronchi dei Legionari

Thu 11/26

6:25 am-2:55 pm

2 stops15h 30m

$886

ChicagoTrieste

ORD - TRS

ORDTRS

Chicago O'Hare Intl

Thu 11/12

10:35 pm-10:45 pm

1 stop17h 10m

Trieste Ronchi dei Legionari

Thu 11/26

6:25 am-4:00 pm

2 stops16h 35m

$888

ChicagoTrieste

ORD - TRS

ORDTRS

Chicago O'Hare Intl

Thu 11/12

4:20 pm-2:05 pm

1 stop14h 45m

Trieste Ronchi dei Legionari

Thu 11/26

2:45 pm-8:05 pm

1 stop12h 20m

$891

ChicagoTrieste

ORD - TRS

ORDTRS

Chicago O'Hare Intl

Sun 7/19

3:00 pm-6:30 pm

1 stop20h 30m

Trieste Ronchi dei Legionari

Sat 8/22

7:15 pm-1:10 pm

1 stop24h 55m

$894
Quickest round-trip

ChicagoTrieste

ORD - TRS

ORDTRS

Chicago O'Hare Intl

Tue 7/21

4:05 pm-1:45 pm

1 stop14h 40m

Trieste Ronchi dei Legionari

Sat 8/22

2:45 pm-7:55 pm

1 stop12h 10m

$913

ChicagoTrieste

MDW - TRS

MDWTRS

Chicago Midway

Tue 7/21

1:18 pm-2:30 pm

2 stops18h 12m

Trieste Ronchi dei Legionari

Tue 7/28

6:35 am-6:25 pm

2 stops18h 50m

$966

ChicagoTrieste

MDW - TRS

MDWTRS

Chicago Midway

Mon 7/20

12:41 pm-2:30 pm

2 stops18h 49m

Trieste Ronchi dei Legionari

Mon 7/27

3:15 pm-6:25 pm

2 stops34h 10m

$1,023

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 ITA Airways 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 31% 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

14h 50m

Direct flights

None
The fastest flight from Illinois to Trieste takes 14h 50m
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
ITA Airways
TAP AIR PORTUGAL
Aer Lingus
American Airlines
British Airways