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Cheap flights from Chicago to Trieste from $414

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Chicago to Trieste departing on 9/29. 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
0 bags

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Find the cheapest flights from Chicago to Trieste

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
6:05 pm - 10:55 pm
ORD
-
TRS
21h 50m
2 stops
Multiple Airlines Logo
11:15 am - 4:00 pm
TRS
-
ORD
35h 45m
2 stops
$1,045Multiple Airlines
Sat, Sep 26 - Sat, Oct 3
Multiple Airlines Logo
6:05 pm - 10:55 pm
ORD
-
TRS
21h 50m
2 stops
Multiple Airlines Logo
11:15 am - 4:00 pm
TRS
-
ORD
35h 45m
2 stops
$1,046Multiple Airlines
Sat, Sep 26 - Sat, Oct 3
Lufthansa Logo
10:30 pm - 10:15 pm
ORD
-
TRS
16h 45m
1 stop
Lufthansa Logo
6:10 am - 12:55 pm
TRS
-
ORD
13h 45m
1 stop
$1,063Lufthansa
Thu, Jul 9 - Fri, Jul 17
Multiple Airlines Logo
11:05 am - 1:55 pm
ORD
-
TRS
19h 50m
2 stops
Multiple Airlines Logo
6:10 am - 12:55 pm
TRS
-
ORD
13h 45m
1 stop
$1,066Multiple Airlines
Thu, Jul 9 - Fri, Jul 17
ITA Airways Logo
3:00 pm - 2:30 pm
ORD
-
TRS
16h 30m
1 stop
ITA Airways Logo
7:15 pm - 1:10 pm
TRS
-
ORD
24h 55m
1 stop
$1,090ITA Airways
Mon, Jul 20 - Sat, Jul 25
KLM Logo
12:41 pm - 2:30 pm
MDW
-
TRS
18h 49m
2 stops
KLM Logo
6:35 am - 6:25 pm
TRS
-
MDW
18h 50m
2 stops
$1,105KLM
Thu, Jul 9 - Fri, Jul 17
KLM Logo
2:07 pm - 2:30 pm
ORD
-
TRS
17h 23m
2 stops
KLM Logo
6:35 am - 8:31 pm
TRS
-
ORD
20h 56m
2 stops
$1,105KLM
Thu, Jul 9 - Fri, Jul 17
ITA Airways Logo
3:00 pm - 10:25 am
ORD
-
TRS
12h 25m
1 stop
ITA Airways Logo
7:15 pm - 1:10 pm
TRS
-
ORD
24h 55m
1 stop
$1,116ITA Airways
Thu, Sep 17 - Fri, Sep 25
TAP AIR PORTUGAL Logo
6:05 pm - 2:30 pm
ORD
-
TRS
37h 25m
2 stops
TAP AIR PORTUGAL Logo
3:15 pm - 4:00 pm
TRS
-
ORD
31h 45m
2 stops
$1,127TAP AIR PORTUGAL
Sat, Sep 5 - Sat, Sep 19
ITA Airways Logo
3:00 pm - 10:25 am
ORD
-
TRS
12h 25m
1 stop
ITA Airways Logo
7:15 pm - 1:10 pm
TRS
-
ORD
24h 55m
1 stop
$1,129ITA Airways
Mon, Jul 20 - Sat, Jul 25

TAP AIR PORTUGAL flights from Chicago to Trieste

Our best TAP AIR PORTUGAL deals on Chicago to Trieste flight tickets
TAP AIR PORTUGAL
Sep 5
ORD6:05 pmChicago O'Hare Intl
37h 25m
2 stops
TRS2:30 pmTrieste Ronchi dei Legionari
Sep 19
TRS3:15 pmTrieste Ronchi dei Legionari
31h 45m
2 stops
ORD4:00 pmChicago O'Hare Intl
$1,127
TAP AIR PORTUGAL
Oct 9
ORD6:00 pmChicago O'Hare Intl
37h 30m
2 stops
TRS2:30 pmTrieste Ronchi dei Legionari
Oct 23
TRS11:15 amTrieste Ronchi dei Legionari
35h 50m
2 stops
ORD4:05 pmChicago O'Hare Intl
$1,664
TAP AIR PORTUGAL
Jul 20
ORD10:56 amChicago O'Hare Intl
28h 59m
3 stops
TRS10:55 pmTrieste Ronchi dei Legionari
Jul 25
TRS3:15 pmTrieste Ronchi dei Legionari
31h 45m
2 stops
ORD4:00 pmChicago O'Hare Intl
$1,743

ITA Airways flights from Chicago to Trieste

Our best ITA Airways deals on Chicago to Trieste flight tickets
ITA Airways
Jul 20
ORD3:00 pmChicago O'Hare Intl
16h 30m
1 stop
TRS2:30 pmTrieste Ronchi dei Legionari
Jul 25
TRS7:15 pmTrieste Ronchi dei Legionari
24h 55m
1 stop
ORD1:10 pmChicago O'Hare Intl
$1,090
ITA Airways
Sep 17
ORD3:00 pmChicago O'Hare Intl
12h 25m
1 stop
TRS10:25 amTrieste Ronchi dei Legionari
Sep 25
TRS7:15 pmTrieste Ronchi dei Legionari
24h 55m
1 stop
ORD1:10 pmChicago O'Hare Intl
$1,116
ITA Airways
Jul 20
ORD3:00 pmChicago O'Hare Intl
12h 25m
1 stop
TRS10:25 amTrieste Ronchi dei Legionari
Jul 25
TRS7:15 pmTrieste Ronchi dei Legionari
24h 55m
1 stop
ORD1:10 pmChicago O'Hare Intl
$1,129

momondo Fare Finder

 
Customize your flight search to find flights from Chicago 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 May 13, 2026.
Use the filters below to find and compare flights from Chicago 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

Sat 9/26

6:05 pm-10:55 pm

2 stops21h 50m

Trieste Ronchi dei Legionari

Sat 10/3

11:15 am-4:00 pm

2 stops35h 45m

$1,045

ChicagoTrieste

ORD - TRS

ORDTRS

Chicago O'Hare Intl

Sat 9/26

6:05 pm-10:55 pm

2 stops21h 50m

Trieste Ronchi dei Legionari

Sat 10/3

11:15 am-4:00 pm

2 stops35h 45m

$1,046
Quickest round-trip

ChicagoTrieste

ORD - TRS

ORDTRS

Chicago O'Hare Intl

Thu 7/9

10:30 pm-10:15 pm

1 stop16h 45m

Trieste Ronchi dei Legionari

Fri 7/17

6:10 am-12:55 pm

1 stop13h 45m

$1,063

ChicagoTrieste

ORD - TRS

ORDTRS

Chicago O'Hare Intl

Thu 7/9

11:05 am-1:55 pm

2 stops19h 50m

Trieste Ronchi dei Legionari

Fri 7/17

6:10 am-12:55 pm

1 stop13h 45m

$1,066

ChicagoTrieste

ORD - TRS

ORDTRS

Chicago O'Hare Intl

Mon 7/20

3:00 pm-2:30 pm

1 stop16h 30m

Trieste Ronchi dei Legionari

Sat 7/25

7:15 pm-1:10 pm

1 stop24h 55m

$1,090

ChicagoTrieste

MDW - TRS

MDWTRS

Chicago Midway

Thu 7/9

12:41 pm-2:30 pm

2 stops18h 49m

Trieste Ronchi dei Legionari

Fri 7/17

6:35 am-6:25 pm

2 stops18h 50m

$1,105

ChicagoTrieste

ORD - TRS

ORDTRS

Chicago O'Hare Intl

Thu 7/9

2:07 pm-2:30 pm

2 stops17h 23m

Trieste Ronchi dei Legionari

Fri 7/17

6:35 am-8:31 pm

2 stops20h 56m

$1,105

ChicagoTrieste

ORD - TRS

ORDTRS

Chicago O'Hare Intl

Thu 9/17

3:00 pm-10:25 am

1 stop12h 25m

Trieste Ronchi dei Legionari

Fri 9/25

7:15 pm-1:10 pm

1 stop24h 55m

$1,116

ChicagoTrieste

ORD - TRS

ORDTRS

Chicago O'Hare Intl

Sat 9/5

6:05 pm-2:30 pm

2 stops37h 25m

Trieste Ronchi dei Legionari

Sat 9/19

3:15 pm-4:00 pm

2 stops31h 45m

$1,127

ChicagoTrieste

ORD - TRS

ORDTRS

Chicago O'Hare Intl

Mon 7/20

3:00 pm-10:25 am

1 stop12h 25m

Trieste Ronchi dei Legionari

Sat 7/25

7:15 pm-1:10 pm

1 stop24h 55m

$1,129

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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How to get the cheapest flight ticket from Chicago 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

Can stopping save me money on Chicago to Trieste flights?

You could potentially save up to 10% on your flight if you consider stops on a Chicago to Trieste flight.

When to book flights from Chicago to Trieste

Are you open to changing your travel dates? Check out the ideal times to fly from Chicago to Trieste according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Chicago to Trieste (CHI to TRS) flight deals and tips

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

Fastest flight time

12h 25m

Direct flights

None
The fastest flight from Chicago to Trieste takes 12h 25m
There are no direct flights from Chicago to Trieste. There are no popular flight routes from Chicago to Trieste.
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Frequently asked questions about flying from Chicago to Trieste

  • How far is Chicago to Trieste Ronchi dei Legionari by plane?

    The distance between Chicago and Trieste Ronchi dei Legionari is about 4695.7 mi. By plane, this route typically takes 12h 25m.

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

    Prices for flights from Chicago to Trieste Ronchi dei Legionari Airport are refreshed on a daily basis.

  • How old do you have to be to fly from Chicago 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 Chicago 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.

  • What is the most popular airline from Chicago to Trieste?

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 Chicago to Trieste?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Chicago to Trieste. momondo saves you time and could save you money on your trip.

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

momondo does allow users to show only those flights to Trieste from Chicago which offer a flexible booking policy as well as other useful filters and features.

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

Once all potential Chicago to Trieste flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

If you are simply researching potential flights to Trieste, momondo offers a useful price alert feature which will track prices for flights to Trieste from Chicago and alert you 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
ITA Airways
SWISS
TAP AIR PORTUGAL
Aer Lingus
British Airways
American Airlines