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Cheap flights from Port of Spain to St. Louis from $322

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Port of Spain to St. Louis departing on 4/16. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Cheap round-trip flights

Enter your travel dates to find the best prices.
Air Canada Logo
1:20 am - 3:25 pm
POS
-
STL
15h 05m
1 stop
Air Canada Logo
1:00 pm - 12:15 am
STL
-
POS
34h 15m
2 stops
$322Air Canada
Thu, Apr 16 - Sat, May 2
United Airlines Logo
12:30 am - 10:27 pm
POS
-
STL
22h 57m
1 stop
United Airlines Logo
10:14 am - 11:23 pm
STL
-
POS
12h 09m
1 stop
$669United Airlines
Thu, Apr 16 - Sat, May 2
United Airlines Logo
12:30 am - 12:27 pm
POS
-
STL
12h 57m
2 stops
United Airlines Logo
7:45 am - 11:23 pm
STL
-
POS
14h 38m
2 stops
$787United Airlines
Thu, Mar 19 - Sun, Apr 5
United Airlines Logo
12:30 am - 10:16 pm
POS
-
STL
22h 46m
1 stop
United Airlines Logo
10:09 am - 11:23 pm
STL
-
POS
12h 14m
1 stop
$793United Airlines
Thu, Mar 19 - Sun, Apr 5
United Airlines Logo
12:30 am - 10:16 pm
POS
-
STL
22h 46m
1 stop
United Airlines Logo
10:09 am - 11:23 pm
STL
-
POS
12h 14m
1 stop
$825United Airlines
Thu, Mar 19 - Sun, Apr 5
United Airlines Logo
12:30 am - 10:16 pm
POS
-
STL
22h 46m
1 stop
United Airlines Logo
10:00 am - 11:23 pm
STL
-
POS
36h 23m
2 stops
$837United Airlines
Thu, Mar 19 - Sun, Apr 5
United Airlines Logo
12:30 am - 2:43 pm
POS
-
STL
15h 13m
2 stops
United Airlines Logo
6:30 am - 11:23 pm
STL
-
POS
15h 53m
2 stops
$911United Airlines
Thu, Mar 19 - Sun, Apr 5
Multiple Airlines Logo
10:00 pm - 9:47 pm
POS
-
STL
24h 47m
3 stops
Multiple Airlines Logo
1:00 pm - 12:15 am
STL
-
POS
34h 15m
2 stops
$1,219Multiple Airlines
Fri, Apr 17 - Sat, May 2

United Airlines flights from Port of Spain to St. Louis

Our best United Airlines deals on Port of Spain to St. Louis flight tickets
United Airlines
Apr 16
POS12:30 amPort of Spain Piarco Intl
22h 57m
1 stop
STL10:27 pmLambert-St Louis
May 2
STL10:14 amLambert-St Louis
12h 09m
1 stop
POS11:23 pmPort of Spain Piarco Intl
$669
United Airlines
Mar 19
POS12:30 amPort of Spain Piarco Intl
12h 57m
2 stops
STL12:27 pmLambert-St Louis
Apr 5
STL7:45 amLambert-St Louis
14h 38m
2 stops
POS11:23 pmPort of Spain Piarco Intl
$787
United Airlines
Mar 19
POS12:30 amPort of Spain Piarco Intl
22h 46m
1 stop
STL10:16 pmLambert-St Louis
Apr 5
STL10:09 amLambert-St Louis
12h 14m
1 stop
POS11:23 pmPort of Spain Piarco Intl
$793

momondo Fare Finder

 
Customize your flight search to find flights from Port of Spain to St. Louis 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 4, 2026.
Use the filters below to find and compare flights from Port of Spain to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Port of SpainSt. Louis

POS - STL

POSSTL

Port of Spain Piarco Intl

Thu 4/16

1:20 am-3:25 pm

1 stop15h 05m

Lambert-St Louis

Sat 5/2

1:00 pm-12:15 am

2 stops34h 15m

$322

Port of SpainSt. Louis

POS - STL

POSSTL

Port of Spain Piarco Intl

Thu 4/16

12:30 am-10:27 pm

1 stop22h 57m

Lambert-St Louis

Sat 5/2

10:14 am-11:23 pm

1 stop12h 09m

$669

Port of SpainSt. Louis

POS - STL

POSSTL

Port of Spain Piarco Intl

Thu 3/19

12:30 am-12:27 pm

2 stops12h 57m

Lambert-St Louis

Sun 4/5

7:45 am-11:23 pm

2 stops14h 38m

$787

Port of SpainSt. Louis

POS - STL

POSSTL

Port of Spain Piarco Intl

Thu 3/19

12:30 am-10:16 pm

1 stop22h 46m

Lambert-St Louis

Sun 4/5

10:09 am-11:23 pm

1 stop12h 14m

$793

Port of SpainSt. Louis

POS - STL

POSSTL

Port of Spain Piarco Intl

Thu 3/19

12:30 am-10:16 pm

1 stop22h 46m

Lambert-St Louis

Sun 4/5

10:09 am-11:23 pm

1 stop12h 14m

$825

Port of SpainSt. Louis

POS - STL

POSSTL

Port of Spain Piarco Intl

Thu 3/19

12:30 am-10:16 pm

1 stop22h 46m

Lambert-St Louis

Sun 4/5

10:00 am-11:23 pm

2 stops36h 23m

$837

Port of SpainSt. Louis

POS - STL

POSSTL

Port of Spain Piarco Intl

Thu 3/19

12:30 am-2:43 pm

2 stops15h 13m

Lambert-St Louis

Sun 4/5

6:30 am-11:23 pm

2 stops15h 53m

$911

Port of SpainSt. Louis

POS - STL

POSSTL

Port of Spain Piarco Intl

Fri 4/17

10:00 pm-9:47 pm

3 stops24h 47m

Lambert-St Louis

Sat 5/2

1:00 pm-12:15 am

2 stops34h 15m

$1,219

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to St. Louis from

How to get the cheapest flight ticket from Port of Spain to St. Louis

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

Can stopping save me money on Port of Spain to St. Louis flights?

You could potentially save up to 1% on your flight if you consider stops on a Port of Spain to St. Louis flight.

When to book flights from Port of Spain to St. Louis

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

Cheap Port of Spain to St. Louis (POS to STL) flight deals and tips

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

Fastest flight time

15h 49m

Direct flights

None
The fastest flight from Port of Spain to St. Louis takes 15h 49m
There are no direct flights from Port of Spain to St. Louis. There are no popular flight routes from Port of Spain to St. Louis.
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  • How far is Port of Spain Piarco Intl to Lambert-St Louis by plane?

    A flight from Port of Spain Piarco Intl to Lambert-St Louis will travel around 2617.4 mi. A reasonable flight in good conditions will take 15h 49m.

  • When did momondo last update prices for flights from Port of Spain Piarco Intl Airport to Lambert-St Louis Airport?

    Prices for flights from Port of Spain Piarco Intl Airport to Lambert-St Louis Airport are refreshed on a daily basis.

  • How old do you have to be to fly from Port of Spain Piarco Intl Airport to Lambert-St Louis 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 Port of Spain Piarco Intl Airport to Lambert-St Louis Airport.

  • What documentation or ID do you need to fly to Lambert-St Louis Airport?

    The required travel and health documents for your Lambert-St Louis Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Lambert-St Louis Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles
Chesterfield
Hermann
Fairview Heights
Florissant
Maryland Heights
O'Fallon
St. Peters
Wentzville
Collinsville
Alton
Fenton
Farmington
Edwardsville
Festus
Clayton
Eureka
Litchfield
Glencoe
Grafton

Why use momondo?

Why should I use momondo to find a flight deal from Port of Spain to St. Louis?

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

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

Flights from Port of Spain to St. Louis with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Port of Spain to St. Louis?

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

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

If you are not ready to book a flight from Port of Spain to St. Louis now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to St. Louis and let you know when they change.

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