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Cheap flights from Missouri to Trieste from $675

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Missouri to Trieste departing on 1/30. 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 Missouri to Trieste

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
3:50 pm - 2:05 pm
STL
-
TRS
15h 15m1 stop
Multiple Airlines Logo
7:15 pm - 11:59 pm
TRS
-
STL
35h 44m2 stops
$675Multiple Airlines
Fri, Jan 30 - Fri, Feb 6
Multiple Airlines Logo
11:22 am - 2:05 pm
STL
-
TRS
19h 43m2 stops
Multiple Airlines Logo
7:15 pm - 11:59 pm
TRS
-
STL
35h 44m2 stops
$679Multiple Airlines
Fri, Jan 30 - Fri, Feb 6
United Airlines Logo
3:23 pm - 10:25 am
MCI
-
TRS
37h 02m2 stops
United Airlines Logo
6:35 am - 5:33 pm
TRS
-
MCI
17h 58m2 stops
$1,154United Airlines
Sat, Mar 21 - Tue, Mar 31
United Airlines Logo
11:22 am - 10:25 am
STL
-
TRS
16h 03m2 stops
United Airlines Logo
6:35 am - 3:29 pm
TRS
-
STL
39h 54m2 stops
$1,859United Airlines
Wed, Feb 4 - Sun, Feb 8
United Airlines Logo
6:27 pm - 10:25 am
MCI
-
TRS
32h 58m2 stops
United Airlines Logo
6:35 am - 5:32 pm
TRS
-
MCI
17h 57m2 stops
$4,002United Airlines
Thu, Feb 19 - Sat, Feb 28

United Airlines flights from Missouri to Trieste

Our best United Airlines deals on Missouri to Trieste flight tickets
United Airlines
Mar 21
MCI3:23 pmKansas City
37h 02m
2 stops
TRS10:25 amTrieste Ronchi dei Legionari
Mar 31
TRS6:35 amTrieste Ronchi dei Legionari
17h 58m
2 stops
MCI5:33 pmKansas City
$1,154
Find similar
United Airlines
Feb 4
STL11:22 amLambert-St Louis
16h 03m
2 stops
TRS10:25 amTrieste Ronchi dei Legionari
Feb 8
TRS6:35 amTrieste Ronchi dei Legionari
39h 54m
2 stops
STL3:29 pmLambert-St Louis
$1,859
Find similar
United Airlines
Feb 19
MCI6:27 pmKansas City
32h 58m
2 stops
TRS10:25 amTrieste Ronchi dei Legionari
Feb 28
TRS6:35 amTrieste Ronchi dei Legionari
17h 57m
2 stops
MCI5:32 pmKansas City
$4,002
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Missouri 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 December 16, 2025.
Use the filters below to find and compare flights from Missouri to Trieste that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisTrieste

STL - TRS

STLTRS

Lambert-St Louis

Fri 1/30

3:50 pm-2:05 pm

1 stop15h 15m

Trieste Ronchi dei Legionari

Fri 2/6

7:15 pm-11:59 pm

2 stops35h 44m

$675

St. LouisTrieste

STL - TRS

STLTRS

Lambert-St Louis

Fri 1/30

11:22 am-2:05 pm

2 stops19h 43m

Trieste Ronchi dei Legionari

Fri 2/6

7:15 pm-11:59 pm

2 stops35h 44m

$679

Kansas CityTrieste

MCI - TRS

MCITRS

Kansas City

Sat 3/21

3:23 pm-10:25 am

2 stops37h 02m

Trieste Ronchi dei Legionari

Tue 3/31

6:35 am-5:33 pm

2 stops17h 58m

$1,154

St. LouisTrieste

STL - TRS

STLTRS

Lambert-St Louis

Wed 2/4

11:22 am-10:25 am

2 stops16h 03m

Trieste Ronchi dei Legionari

Sun 2/8

6:35 am-3:29 pm

2 stops39h 54m

$1,859

Kansas CityTrieste

MCI - TRS

MCITRS

Kansas City

Thu 2/19

6:27 pm-10:25 am

2 stops32h 58m

Trieste Ronchi dei Legionari

Sat 2/28

6:35 am-5:32 pm

2 stops17h 57m

$4,002

Kansas CityTrieste

MCI - TRS

MCITRS

Kansas City

Wed 4/1

8:00 am-10:25 am

2 stops19h 25m

$829

Kansas CityTrieste

MCI - TRS

MCITRS

Kansas City

Fri 4/10

5:18 pm-10:25 am

2 stops58h 07m

$904

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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How to get the cheapest flight ticket from Missouri 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 Missouri to Trieste Ronchi dei Legionari?

United Airlines is the most popular carrier operating from Missouri to Trieste Ronchi dei Legionari

What airlines fly to Trieste?

American Airlines, United Airlines and Delta are the top three most popular airlines that fly to Trieste from Missouri according to our data. American Airlines is the first choice among our users, with 36% of people opting to fly with this airline when traveling to Trieste. Keep in mind that there are 7 different airlines that fly to Trieste on a routine basis, so you have a few additional options to choose from.

Cheap Missouri to Trieste flight deals and tips

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

Fastest flight time

15h 53m

Direct flights

None
The fastest flight from Missouri to Trieste takes 15h 53m
There are no direct flights from Missouri to Trieste. There are no popular flight routes from Missouri to Trieste.
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  • When did momondo last update prices for flights from Missouri to Trieste Ronchi dei Legionari Airport?

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

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

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Missouri to Trieste Ronchi dei Legionari Airport.

  • What documentation or ID do you need to fly to Trieste Ronchi dei Legionari Airport?

    The travel and health documents required for your trip to Trieste Ronchi dei Legionari Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Trieste Ronchi dei Legionari Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

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 Missouri to Trieste?

It is quick and easy to find Missouri to Trieste flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Trieste that suits you.

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

Yes. All flights to Trieste from Missouri on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

momondo provides multiple filters to help you find the best flight to Trieste from Missouri. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Yes momondo offers price alerts on flights to Trieste from Missouri. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your Trieste trip

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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
American Airlines
United Airlines
Delta
Air Canada
British Airways
Lufthansa
KLM