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Cheap flights from Missouri to Trieste from $835

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 8/20. 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 Missouri to Trieste

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
7:00 am - 10:15 pm
STL
-
TRS
32h 15m
2 stops
Multiple Airlines Logo
6:10 am - 7:45 pm
TRS
-
STL
20h 35m
2 stops
$835Multiple Airlines
Thu, Aug 20 - Fri, Aug 28
Lufthansa Logo
12:10 pm - 2:00 pm
STL
-
TRS
18h 50m
2 stops
Lufthansa Logo
6:10 am - 8:24 pm
TRS
-
STL
21h 14m
2 stops
$945Lufthansa
Wed, Aug 12 - Wed, Aug 19
Lufthansa Logo
12:59 pm - 1:55 pm
STL
-
TRS
17h 56m
2 stops
Lufthansa Logo
6:10 am - 1:25 pm
TRS
-
STL
14h 15m
1 stop
$952Lufthansa
Thu, Aug 20 - Fri, Aug 28
Lufthansa Logo
3:30 pm - 2:00 pm
STL
-
TRS
15h 30m
1 stop
Lufthansa Logo
6:10 am - 1:25 pm
TRS
-
STL
14h 15m
1 stop
$960Lufthansa
Wed, Aug 12 - Wed, Aug 19
Lufthansa Logo
3:30 pm - 2:00 pm
STL
-
TRS
15h 30m
1 stop
Lufthansa Logo
2:40 pm - 10:59 pm
TRS
-
STL
39h 19m
2 stops
$964Lufthansa
Wed, Aug 12 - Wed, Aug 19
United Airlines Logo
1:03 pm - 10:25 am
MCI
-
TRS
14h 22m
2 stops
United Airlines Logo
6:35 am - 5:30 pm
TRS
-
MCI
17h 55m
2 stops
$1,229United Airlines
Mon, Aug 3 - Wed, Aug 19
United Airlines Logo
1:08 pm - 10:25 am
MCI
-
TRS
14h 17m
2 stops
United Airlines Logo
6:35 am - 5:30 pm
TRS
-
MCI
17h 55m
2 stops
$1,250United Airlines
Tue, Aug 11 - Tue, Aug 18
United Airlines Logo
12:59 pm - 10:25 am
STL
-
TRS
14h 26m
2 stops
United Airlines Logo
6:35 am - 9:37 pm
TRS
-
STL
22h 02m
2 stops
$1,331United Airlines
Tue, Sep 15 - Sat, Sep 26
Multiple Airlines Logo
12:10 pm - 8:15 pm
STL
-
TRS
25h 05m
2 stops
Multiple Airlines Logo
7:15 pm - 6:42 pm
TRS
-
STL
30h 27m
3 stops
$1,374Multiple Airlines
Thu, Aug 20 - Fri, Aug 28
Multiple Airlines Logo
8:55 am - 8:15 pm
STL
-
TRS
28h 20m
3 stops
Multiple Airlines Logo
7:15 pm - 6:42 pm
TRS
-
STL
30h 27m
3 stops
$1,381Multiple Airlines
Thu, Aug 20 - Fri, Aug 28

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United Airlines flights from Missouri to Trieste

Our best United Airlines deals on Missouri to Trieste flight tickets
United Airlines
Aug 3
MCI1:03 pmKansas City
14h 22m
2 stops
TRS10:25 amTrieste Ronchi dei Legionari
Aug 19
TRS6:35 amTrieste Ronchi dei Legionari
17h 55m
2 stops
MCI5:30 pmKansas City
$1,229
United Airlines
Aug 11
MCI1:08 pmKansas City
14h 17m
2 stops
TRS10:25 amTrieste Ronchi dei Legionari
Aug 18
TRS6:35 amTrieste Ronchi dei Legionari
17h 55m
2 stops
MCI5:30 pmKansas City
$1,250
United Airlines
Sep 15
STL12:59 pmLambert-St Louis
14h 26m
2 stops
TRS10:25 amTrieste Ronchi dei Legionari
Sep 26
TRS6:35 amTrieste Ronchi dei Legionari
22h 02m
2 stops
STL9:37 pmLambert-St Louis
$1,331

Lufthansa flights from Missouri to Trieste

Our best Lufthansa deals on Missouri to Trieste flight tickets
Lufthansa
Aug 12
STL12:10 pmLambert-St Louis
18h 50m
2 stops
TRS2:00 pmTrieste Ronchi dei Legionari
Aug 19
TRS6:10 amTrieste Ronchi dei Legionari
21h 14m
2 stops
STL8:24 pmLambert-St Louis
$945
Lufthansa
Aug 20
STL12:59 pmLambert-St Louis
17h 56m
2 stops
TRS1:55 pmTrieste Ronchi dei Legionari
Aug 28
TRS6:10 amTrieste Ronchi dei Legionari
14h 15m
1 stop
STL1:25 pmLambert-St Louis
$952
Lufthansa
Aug 12
STL3:30 pmLambert-St Louis
15h 30m
1 stop
TRS2:00 pmTrieste Ronchi dei Legionari
Aug 19
TRS6:10 amTrieste Ronchi dei Legionari
14h 15m
1 stop
STL1:25 pmLambert-St Louis
$960

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 July 1, 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

Thu 8/20

7:00 am-10:15 pm

2 stops32h 15m

Trieste Ronchi dei Legionari

Fri 8/28

6:10 am-7:45 pm

2 stops20h 35m

$835

St. LouisTrieste

STL - TRS

STLTRS

Lambert-St Louis

Wed 8/12

12:10 pm-2:00 pm

2 stops18h 50m

Trieste Ronchi dei Legionari

Wed 8/19

6:10 am-8:24 pm

2 stops21h 14m

$945

St. LouisTrieste

STL - TRS

STLTRS

Lambert-St Louis

Thu 8/20

12:59 pm-1:55 pm

2 stops17h 56m

Trieste Ronchi dei Legionari

Fri 8/28

6:10 am-1:25 pm

1 stop14h 15m

$952
Quickest round-trip

St. LouisTrieste

STL - TRS

STLTRS

Lambert-St Louis

Wed 8/12

3:30 pm-2:00 pm

1 stop15h 30m

Trieste Ronchi dei Legionari

Wed 8/19

6:10 am-1:25 pm

1 stop14h 15m

$960

St. LouisTrieste

STL - TRS

STLTRS

Lambert-St Louis

Wed 8/12

3:30 pm-2:00 pm

1 stop15h 30m

Trieste Ronchi dei Legionari

Wed 8/19

2:40 pm-10:59 pm

2 stops39h 19m

$964

Kansas CityTrieste

MCI - TRS

MCITRS

Kansas City

Mon 8/3

1:03 pm-10:25 am

2 stops14h 22m

Trieste Ronchi dei Legionari

Wed 8/19

6:35 am-5:30 pm

2 stops17h 55m

$1,229

Kansas CityTrieste

MCI - TRS

MCITRS

Kansas City

Tue 8/11

1:08 pm-10:25 am

2 stops14h 17m

Trieste Ronchi dei Legionari

Tue 8/18

6:35 am-5:30 pm

2 stops17h 55m

$1,250

St. LouisTrieste

STL - TRS

STLTRS

Lambert-St Louis

Tue 9/15

12:59 pm-10:25 am

2 stops14h 26m

Trieste Ronchi dei Legionari

Sat 9/26

6:35 am-9:37 pm

2 stops22h 02m

$1,331

St. LouisTrieste

STL - TRS

STLTRS

Lambert-St Louis

Thu 8/20

12:10 pm-8:15 pm

2 stops25h 05m

Trieste Ronchi dei Legionari

Fri 8/28

7:15 pm-6:42 pm

3 stops30h 27m

$1,374

St. LouisTrieste

STL - TRS

STLTRS

Lambert-St Louis

Thu 8/20

8:55 am-8:15 pm

3 stops28h 20m

Trieste Ronchi dei Legionari

Fri 8/28

7:15 pm-6:42 pm

3 stops30h 27m

$1,381

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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 airlines fly to Trieste?

United Airlines, Delta and Lufthansa are the top three most popular airlines that fly to Trieste from Missouri according to our data. United Airlines is the first choice among our users, with 29% of people opting to fly with this airline when traveling to Trieste. Keep in mind that there are 5 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

Frequently asked questions about flying from Missouri to Trieste

  • 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
United Airlines
Delta
Lufthansa
British Airways
American Airlines