How does KAYAK find such low prices on flights from Illinois to Trieste?

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 Illinois to Trieste.

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

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Trieste from Illinois 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 Illinois to Trieste?

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 to Trieste with an airline and back to Illinois with another airline.

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

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 to Trieste from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

$311 CHEAP FLIGHTS from Illinois to Trieste

Save 25% or more on flights. Compare deals from all over the web.

Never overpay with our price tracking tools.

Filter searches by price, airline and more to find your best flights.

Flight Deals

Cheap Flights from Illinois to Trieste

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Recent round-trip flight deals from Illinois to Trieste

Sun, Mar 7 - Thu, Mar 11

8:10 pm - 6:30 pmORD Chicago O'Hare Intl-TRS Trieste Ronchi dei Legionari

15h 20m2 stops Lisbon Humberto Delgado Rome Fiumicino

11:15 am - 3:30 pmTRS Trieste Ronchi dei Legionari-ORD Chicago O'Hare Intl

35h 15m2 stops Rome Fiumicino Lisbon Humberto Delgado

$883TAP AIR PORTUGAL

Wed, Jan 13 - Sun, Jan 24

11:20 am - 2:30 pmORD Chicago O'Hare Intl-TRS Trieste Ronchi dei Legionari

20h 10m2 stops Atlanta Hartsfield-Jackson Rome Fiumicino

6:35 am - 6:42 pmTRS Trieste Ronchi dei Legionari-ORD Chicago O'Hare Intl

19h 07m2 stops Rome Fiumicino Boston Logan Intl

$944KLM

Wed, Jan 13 - Sun, Jan 24

6:50 pm - 6:30 pmORD Chicago O'Hare Intl-TRS Trieste Ronchi dei Legionari

16h 40m2 stops Zurich Rome Fiumicino

3:15 pm - 4:15 pmTRS Trieste Ronchi dei Legionari-ORD Chicago O'Hare Intl

56h 00m2 stops Rome Fiumicino Zurich

$1,010Multiple Airlines

Mon, Dec 14 - Mon, Dec 21

11:39 am - 2:30 pmORD Chicago O'Hare Intl-TRS Trieste Ronchi dei Legionari

19h 51m2 stops Detroit Metropolitan Wayne County Rome Fiumicino

6:35 am - 8:03 pmTRS Trieste Ronchi dei Legionari-ORD Chicago O'Hare Intl

20h 28m2 stops Rome Fiumicino Atlanta Hartsfield-Jackson

$1,021KLM

Mon, Mar 1 - Fri, Mar 5

10:33 am - 10:25 amORD Chicago O'Hare Intl-TRS Trieste Ronchi dei Legionari

16h 52m2 stops Newark Rome Fiumicino

6:35 am - 1:10 pmTRS Trieste Ronchi dei Legionari-ORD Chicago O'Hare Intl

13h 35m1 stop Rome Fiumicino

$1,050United Airlines

Mon, Mar 1 - Fri, Mar 5

11:40 am - 10:25 amORD Chicago O'Hare Intl-TRS Trieste Ronchi dei Legionari

15h 45m2 stops Newark Rome Fiumicino

6:35 am - 9:55 pmTRS Trieste Ronchi dei Legionari-ORD Chicago O'Hare Intl

22h 20m2 stops Rome Fiumicino Newark

$1,060United Airlines

Mon, Dec 14 - Mon, Dec 21

3:40 pm - 10:25 amORD Chicago O'Hare Intl-TRS Trieste Ronchi dei Legionari

11h 45m1 stop Rome Fiumicino

3:15 pm - 1:10 pmTRS Trieste Ronchi dei Legionari-ORD Chicago O'Hare Intl

28h 55m1 stop Rome Fiumicino

$1,095Multiple Airlines

Mon, Dec 14 - Mon, Dec 21

3:40 pm - 6:30 pmORD Chicago O'Hare Intl-TRS Trieste Ronchi dei Legionari

19h 50m1 stop Rome Fiumicino

3:15 pm - 1:10 pmTRS Trieste Ronchi dei Legionari-ORD Chicago O'Hare Intl

28h 55m2 stops Rome Fiumicino Frankfurt am Main

$1,097Lufthansa

Wed, Jan 13 - Sun, Jan 24

7:00 pm - 6:30 pmORD Chicago O'Hare Intl-TRS Trieste Ronchi dei Legionari

16h 30m2 stops Lisbon Humberto Delgado Rome Fiumicino

7:15 pm - 4:50 pmTRS Trieste Ronchi dei Legionari-ORD Chicago O'Hare Intl

28h 35m3 stops Rome Fiumicino Frankfurt am Main Toronto Pearson Intl

$1,098Multiple Airlines

Mon, Dec 14 - Mon, Dec 21

6:30 pm - 10:55 pmORD Chicago O'Hare Intl-TRS Trieste Ronchi dei Legionari

21h 25m3 stops Reykjavik Keflavik Intl London Heathrow Rome Fiumicino

11:15 am - 3:30 pmTRS Trieste Ronchi dei Legionari-ORD Chicago O'Hare Intl

59h 15m2 stops Rome Fiumicino Lisbon Humberto Delgado

$1,103Multiple Airlines

Useful Info

Cheapest flight	$311

Flight from Chicago to Trieste

How does KAYAK find such low prices on flights from Illinois to Trieste?
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 Illinois to Trieste.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to Trieste?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Trieste from Illinois 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 Illinois to Trieste?
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 to Trieste with an airline and back to Illinois with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to Trieste?
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 to Trieste from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.