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Cheap flights from St. Louis to Cagliari from $748

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Cagliari departing on 4/21. 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 St. Louis to Cagliari

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
4:05 pm - 7:40 am
STL
-
CAG
32h 35m
2 stops
Multiple Airlines Logo
6:35 pm - 3:25 pm
CAG
-
STL
51h 50m
2 stops
$748Multiple Airlines
Tue, Apr 21 - Tue, Apr 28
KLM Logo
5:59 pm - 4:25 pm
STL
-
CAG
15h 26m
2 stops
KLM Logo
5:05 pm - 5:44 pm
CAG
-
STL
31h 39m
2 stops
$808KLM
Tue, Apr 7 - Tue, Apr 14
Multiple Airlines Logo
4:05 pm - 8:10 am
STL
-
CAG
33h 05m
2 stops
Multiple Airlines Logo
6:35 pm - 8:04 pm
CAG
-
STL
32h 29m
2 stops
$906Multiple Airlines
Thu, Apr 23 - Thu, Apr 30
Multiple Airlines Logo
4:05 pm - 6:15 pm
STL
-
CAG
43h 10m
2 stops
Multiple Airlines Logo
6:35 pm - 8:04 pm
CAG
-
STL
32h 29m
2 stops
$981Multiple Airlines
Fri, Apr 24 - Fri, May 1
Multiple Airlines Logo
4:05 pm - 8:10 am
STL
-
CAG
33h 05m
2 stops
Multiple Airlines Logo
6:55 pm - 1:25 pm
CAG
-
STL
25h 30m
1 stop
$1,057Multiple Airlines
Thu, Apr 23 - Thu, Apr 30
Multiple Airlines Logo
4:13 pm - 4:25 pm
STL
-
CAG
17h 12m
2 stops
Multiple Airlines Logo
6:55 pm - 4:55 pm
CAG
-
STL
29h 00m
2 stops
$1,166Multiple Airlines
Sat, Sep 5 - Sat, Sep 12
Multiple Airlines Logo
4:05 pm - 7:40 am
STL
-
CAG
32h 35m
3 stops
Multiple Airlines Logo
6:35 pm - 1:25 pm
CAG
-
STL
25h 50m
3 stops
$1,181Multiple Airlines
Tue, Apr 21 - Tue, Apr 28
Multiple Airlines Logo
7:05 am - 5:45 pm
STL
-
CAG
27h 40m
2 stops
Multiple Airlines Logo
6:35 pm - 8:25 pm
CAG
-
STL
56h 50m
2 stops
$1,185Multiple Airlines
Wed, Jun 10 - Tue, Jun 16
KLM Logo
1:30 pm - 4:25 pm
STL
-
CAG
19h 55m
2 stops
KLM Logo
5:05 pm - 4:55 pm
CAG
-
STL
30h 50m
2 stops
$1,201KLM
Wed, Jul 1 - Tue, Jul 14
KLM Logo
4:13 pm - 4:25 pm
STL
-
CAG
17h 12m
2 stops
KLM Logo
5:05 pm - 4:49 pm
CAG
-
STL
30h 44m
2 stops
$1,223KLM
Tue, Jun 9 - Wed, Jun 17

KLM flights from St. Louis to Cagliari

Our best KLM deals on St. Louis to Cagliari flight tickets
KLM
Apr 7
STL5:59 pmLambert-St Louis
15h 26m
2 stops
CAG4:25 pmCagliari Elmas
Apr 14
CAG5:05 pmCagliari Elmas
31h 39m
2 stops
STL5:44 pmLambert-St Louis
$808
KLM
Jul 1
STL1:30 pmLambert-St Louis
19h 55m
2 stops
CAG4:25 pmCagliari Elmas
Jul 14
CAG5:05 pmCagliari Elmas
30h 50m
2 stops
STL4:55 pmLambert-St Louis
$1,201
KLM
Jun 9
STL4:13 pmLambert-St Louis
17h 12m
2 stops
CAG4:25 pmCagliari Elmas
Jun 16
CAG5:05 pmCagliari Elmas
28h 32m
2 stops
STL2:37 pmLambert-St Louis
$1,223

Lufthansa flights from St. Louis to Cagliari

Our best Lufthansa deals on St. Louis to Cagliari flight tickets
Lufthansa
Jul 1
STL3:30 pmLambert-St Louis
19h 40m
1 stop
CAG6:10 pmCagliari Elmas
Jul 14
CAG6:35 pmCagliari Elmas
35h 09m
2 stops
STL10:44 pmLambert-St Louis
$1,694
Lufthansa
Jul 1
STL3:30 pmLambert-St Louis
19h 40m
1 stop
CAG6:10 pmCagliari Elmas
Jul 14
CAG6:35 pmCagliari Elmas
36h 10m
2 stops
STL11:45 pmLambert-St Louis
$1,727
Lufthansa
Jul 1
STL3:30 pmLambert-St Louis
19h 40m
1 stop
CAG6:10 pmCagliari Elmas
Jul 14
CAG6:35 pmCagliari Elmas
36h 10m
2 stops
STL11:45 pmLambert-St Louis
$1,777

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Cagliari 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 12, 2026.
Use the filters below to find and compare flights from St. Louis to Cagliari that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisCagliari

STL - CAG

STLCAG

Lambert-St Louis

Tue 4/21

4:05 pm-7:40 am

2 stops32h 35m

Cagliari Elmas

Tue 4/28

6:35 pm-3:25 pm

2 stops51h 50m

$748

St. LouisCagliari

STL - CAG

STLCAG

Lambert-St Louis

Tue 4/7

5:59 pm-4:25 pm

2 stops15h 26m

Cagliari Elmas

Tue 4/14

5:05 pm-5:44 pm

2 stops31h 39m

$808

St. LouisCagliari

STL - CAG

STLCAG

Lambert-St Louis

Thu 4/23

4:05 pm-8:10 am

2 stops33h 05m

Cagliari Elmas

Thu 4/30

6:35 pm-8:04 pm

2 stops32h 29m

$906

St. LouisCagliari

STL - CAG

STLCAG

Lambert-St Louis

Fri 4/24

4:05 pm-6:15 pm

2 stops43h 10m

Cagliari Elmas

Fri 5/1

6:35 pm-8:04 pm

2 stops32h 29m

$981

St. LouisCagliari

STL - CAG

STLCAG

Lambert-St Louis

Thu 4/23

4:05 pm-8:10 am

2 stops33h 05m

Cagliari Elmas

Thu 4/30

6:55 pm-1:25 pm

1 stop25h 30m

$1,057
Quickest round-trip

St. LouisCagliari

STL - CAG

STLCAG

Lambert-St Louis

Sat 9/5

4:13 pm-4:25 pm

2 stops17h 12m

Cagliari Elmas

Sat 9/12

6:55 pm-4:55 pm

2 stops29h 00m

$1,166

St. LouisCagliari

STL - CAG

STLCAG

Lambert-St Louis

Tue 4/21

4:05 pm-7:40 am

3 stops32h 35m

Cagliari Elmas

Tue 4/28

6:35 pm-1:25 pm

3 stops25h 50m

$1,181

St. LouisCagliari

STL - CAG

STLCAG

Lambert-St Louis

Wed 6/10

7:05 am-5:45 pm

2 stops27h 40m

Cagliari Elmas

Tue 6/16

6:35 pm-8:25 pm

2 stops56h 50m

$1,185

St. LouisCagliari

STL - CAG

STLCAG

Lambert-St Louis

Wed 7/1

1:30 pm-4:25 pm

2 stops19h 55m

Cagliari Elmas

Tue 7/14

5:05 pm-4:55 pm

2 stops30h 50m

$1,201

St. LouisCagliari

STL - CAG

STLCAG

Lambert-St Louis

Tue 6/9

4:13 pm-4:25 pm

2 stops17h 12m

Cagliari Elmas

Wed 6/17

5:05 pm-4:49 pm

2 stops30h 44m

$1,223

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

When to book flights from St. Louis to Cagliari

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

Cheap St. Louis to Cagliari (STL to CAG) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Cagliari

Fastest flight time

17h 12m

Direct flights

None
The fastest flight from St. Louis to Cagliari takes 17h 12m
There are no direct flights from St. Louis to Cagliari. There are no popular flight routes from St. Louis to Cagliari.
Search flight deals

  • How far is Lambert-St Louis to Cagliari Elmas by plane?

    The distance between Lambert-St Louis and Cagliari Elmas is about 5022.2 mi. By plane, this route typically takes 17h 12m.

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Cagliari Elmas Airport?

    Prices for flights from Lambert-St Louis Airport to Cagliari Elmas Airport are refreshed on a daily basis.

  • How old do you have to be to fly from Lambert-St Louis Airport to Cagliari Elmas Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Lambert-St Louis Airport to Cagliari Elmas Airport.

  • What documentation or ID do you need to fly to Cagliari Elmas Airport?

    The travel and health documents required for your trip to Cagliari Elmas 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 Cagliari Elmas Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • How do I get Price Alerts for flights from St. Louis to Cagliari?

    Confirm your travel details to search for the latest offers for flights from St. Louis to Cagliari. While browsing offers there will be the option to toggle “Price Alerts”. You’ll then receive updates when prices for the flight route increase or decrease.

  • How can I save money on flights from St. Louis to Cagliari with momondo?

    Plan your trips smart with the “Price Forecast” feature, which uses flight data to help you pick the best days to fly for the lowest fares. Our “Price Calendar” helps you get the most for your money by showing you when it’s most advantageous to fly. Curate your own travel experiences for less with “Explore”. Expert travel hacks to fuel your next adventure are a click away with “Discover” by momondo. Set up our “Price Alerts” to track fare changes and book when prices are at their lowest point.

  • How does momondo find its flight prices?

    momondo shows deals across 700+ competitors all at once. momondo is active in 30 international markets, so you can have access to a wide range of options from airlines and OTAs alike.

Traveling to a place near Cagliari?

Book flights to Cagliari if you plan to visit one of these locations
Villasimius
Arbatax
Oristano
Pula

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Cagliari?

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

Can I find flights from St. Louis to Cagliari with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for St. Louis to Cagliari flights to just show those with flexible booking policies.

How can momondo help me find flights from St. Louis to Cagliari?

momondo helps you find the best flight between St. Louis and Cagliari by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

Of course. momondo tracks the price of St. Louis to Cagliari flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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