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Cheap flights from Missouri to Trieste from $923

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Missouri to Trieste departing on 6/6. 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

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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
7:09 pm - 9:55 pm
STL
-
TRS
19h 46m
2 stops
Multiple Airlines Logo
6:10 am - 12:06 pm
TRS
-
STL
36h 56m
2 stops
$1,094Multiple Airlines
Fri, May 8 - Fri, May 15
Multiple Airlines Logo
2:15 pm - 9:55 pm
STL
-
TRS
24h 40m
2 stops
Multiple Airlines Logo
6:10 am - 1:25 pm
TRS
-
STL
14h 15m
1 stop
$1,098Multiple Airlines
Fri, May 8 - Fri, May 15
United Airlines Logo
8:44 am - 10:25 am
STL
-
TRS
42h 41m
2 stops
United Airlines Logo
6:35 am - 11:50 pm
TRS
-
STL
24h 15m
2 stops
$1,102United Airlines
Mon, Aug 17 - Fri, Aug 21
United Airlines Logo
12:10 pm - 10:25 am
STL
-
TRS
39h 15m
2 stops
United Airlines Logo
6:35 am - 9:22 pm
TRS
-
STL
21h 47m
2 stops
$1,111United Airlines
Mon, Aug 17 - Fri, Aug 21
United Airlines Logo
1:18 pm - 10:25 am
STL
-
TRS
14h 07m
2 stops
United Airlines Logo
6:35 am - 11:50 pm
TRS
-
STL
24h 15m
2 stops
$1,112United Airlines
Mon, Aug 17 - Fri, Aug 21
Lufthansa Logo
7:09 pm - 10:25 pm
STL
-
TRS
20h 16m
2 stops
Lufthansa Logo
2:50 pm - 7:27 pm
TRS
-
STL
35h 37m
2 stops
$1,118Lufthansa
Mon, May 11 - Mon, May 18
Multiple Airlines Logo
2:15 pm - 10:15 pm
STL
-
TRS
25h 00m
2 stops
Multiple Airlines Logo
6:10 am - 1:25 pm
TRS
-
STL
14h 15m
1 stop
$1,142Multiple Airlines
Sun, May 10 - Sun, May 17
Multiple Airlines Logo
2:15 pm - 10:15 pm
STL
-
TRS
25h 00m
2 stops
Multiple Airlines Logo
6:10 am - 4:39 pm
TRS
-
STL
17h 29m
2 stops
$1,147Multiple Airlines
Sun, May 10 - Sun, May 17
United Airlines Logo
9:10 am - 10:25 am
MCI
-
TRS
42h 15m
2 stops
United Airlines Logo
6:35 am - 11:25 pm
TRS
-
MCI
23h 50m
2 stops
$1,150United Airlines
Mon, Aug 17 - Fri, Aug 21
Lufthansa Logo
3:30 pm - 9:55 pm
STL
-
TRS
23h 25m
1 stop
Lufthansa Logo
6:10 am - 1:25 pm
TRS
-
STL
14h 15m
1 stop
$1,269Lufthansa
Fri, May 8 - Fri, May 15

United Airlines flights from Missouri to Trieste

Our best United Airlines deals on Missouri to Trieste flight tickets
United Airlines
Aug 17
STL8:44 amLambert-St Louis
42h 41m
2 stops
TRS10:25 amTrieste Ronchi dei Legionari
Aug 21
TRS6:35 amTrieste Ronchi dei Legionari
24h 15m
2 stops
STL11:50 pmLambert-St Louis
$1,102
United Airlines
Aug 17
STL12:10 pmLambert-St Louis
39h 15m
2 stops
TRS10:25 amTrieste Ronchi dei Legionari
Aug 21
TRS6:35 amTrieste Ronchi dei Legionari
21h 47m
2 stops
STL9:22 pmLambert-St Louis
$1,111
United Airlines
Aug 17
STL1:18 pmLambert-St Louis
14h 07m
2 stops
TRS10:25 amTrieste Ronchi dei Legionari
Aug 21
TRS6:35 amTrieste Ronchi dei Legionari
24h 15m
2 stops
STL11:50 pmLambert-St Louis
$1,112

Lufthansa flights from Missouri to Trieste

Our best Lufthansa deals on Missouri to Trieste flight tickets
Lufthansa
May 11
STL7:09 pmLambert-St Louis
20h 16m
2 stops
TRS10:25 pmTrieste Ronchi dei Legionari
May 18
TRS2:50 pmTrieste Ronchi dei Legionari
35h 37m
2 stops
STL7:27 pmLambert-St Louis
$1,118
Lufthansa
May 8
STL3:30 pmLambert-St Louis
23h 25m
1 stop
TRS9:55 pmTrieste Ronchi dei Legionari
May 15
TRS6:10 amTrieste Ronchi dei Legionari
14h 15m
1 stop
STL1:25 pmLambert-St Louis
$1,269
Lufthansa
May 10
STL3:30 pmLambert-St Louis
23h 45m
1 stop
TRS10:15 pmTrieste Ronchi dei Legionari
May 17
TRS6:10 amTrieste Ronchi dei Legionari
14h 15m
1 stop
STL1:25 pmLambert-St Louis
$1,385

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 March 28, 2026.
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

Cheapest round-trip

St. LouisTrieste

STL - TRS

STLTRS

Lambert-St Louis

Fri 5/8

7:09 pm-9:55 pm

2 stops19h 46m

Trieste Ronchi dei Legionari

Fri 5/15

6:10 am-12:06 pm

2 stops36h 56m

$1,094

St. LouisTrieste

STL - TRS

STLTRS

Lambert-St Louis

Fri 5/8

2:15 pm-9:55 pm

2 stops24h 40m

Trieste Ronchi dei Legionari

Fri 5/15

6:10 am-1:25 pm

1 stop14h 15m

$1,098

St. LouisTrieste

STL - TRS

STLTRS

Lambert-St Louis

Mon 8/17

8:44 am-10:25 am

2 stops42h 41m

Trieste Ronchi dei Legionari

Fri 8/21

6:35 am-11:50 pm

2 stops24h 15m

$1,102

St. LouisTrieste

STL - TRS

STLTRS

Lambert-St Louis

Mon 8/17

12:10 pm-10:25 am

2 stops39h 15m

Trieste Ronchi dei Legionari

Fri 8/21

6:35 am-9:22 pm

2 stops21h 47m

$1,111

St. LouisTrieste

STL - TRS

STLTRS

Lambert-St Louis

Mon 8/17

1:18 pm-10:25 am

2 stops14h 07m

Trieste Ronchi dei Legionari

Fri 8/21

6:35 am-11:50 pm

2 stops24h 15m

$1,112

St. LouisTrieste

STL - TRS

STLTRS

Lambert-St Louis

Mon 5/11

7:09 pm-10:25 pm

2 stops20h 16m

Trieste Ronchi dei Legionari

Mon 5/18

2:50 pm-7:27 pm

2 stops35h 37m

$1,118

St. LouisTrieste

STL - TRS

STLTRS

Lambert-St Louis

Sun 5/10

2:15 pm-10:15 pm

2 stops25h 00m

Trieste Ronchi dei Legionari

Sun 5/17

6:10 am-1:25 pm

1 stop14h 15m

$1,142

St. LouisTrieste

STL - TRS

STLTRS

Lambert-St Louis

Sun 5/10

2:15 pm-10:15 pm

2 stops25h 00m

Trieste Ronchi dei Legionari

Sun 5/17

6:10 am-4:39 pm

2 stops17h 29m

$1,147

Kansas CityTrieste

MCI - TRS

MCITRS

Kansas City

Mon 8/17

9:10 am-10:25 am

2 stops42h 15m

Trieste Ronchi dei Legionari

Fri 8/21

6:35 am-11:25 pm

2 stops23h 50m

$1,150
Quickest round-trip

St. LouisTrieste

STL - TRS

STLTRS

Lambert-St Louis

Fri 5/8

3:30 pm-9:55 pm

1 stop23h 25m

Trieste Ronchi dei Legionari

Fri 5/15

6:10 am-1:25 pm

1 stop14h 15m

$1,269

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 resultsSorted by cheapest first
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See travel insights to Trieste from

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?

Delta, American Airlines and United Airlines are the top three most popular airlines that fly to Trieste from Missouri according to our data. Delta is the first choice among our users, with 30% of people opting to fly with this airline when traveling to Trieste. Keep in mind that there are 6 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

14h 22m

Direct flights

None
The fastest flight from Missouri to Trieste takes 14h 22m
There are no direct flights from Missouri to Trieste. There are no popular flight routes from Missouri to Trieste.
Search flight deals

  • 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

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
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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
Delta
American Airlines
United Airlines
Air Canada
Lufthansa
British Airways