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Cheap flights from Port of Spain to St. Louis from $341

This is the cheapest one-way 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 6/22. 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

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Port of Spain to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
12:30 am - 10:07 am
POS
-
STL
10h 37m
1 stop
United Airlines Logo
11:10 am - 11:23 pm
STL
-
POS
11h 13m
1 stop
$715United Airlines
Wed, Jul 8 - Fri, Jul 24
United Airlines Logo
12:30 am - 10:07 am
POS
-
STL
10h 37m
1 stop
United Airlines Logo
6:00 am - 12:50 am
STL
-
POS
17h 50m
2 stops
$718United Airlines
Wed, Jul 8 - Fri, Jul 24
American Airlines Logo
3:18 pm - 8:33 am
POS
-
STL
18h 15m
2 stops
American Airlines Logo
6:14 am - 10:33 pm
STL
-
POS
15h 19m
2 stops
$747American Airlines
Thu, Jul 9 - Fri, Jul 24
United Airlines Logo
2:00 am - 11:16 am
POS
-
STL
10h 16m
1 stop
United Airlines Logo
7:00 am - 12:50 am
STL
-
POS
16h 50m
1 stop
$793United Airlines
Sat, Aug 22 - Sat, Aug 29
United Airlines Logo
2:00 am - 5:06 pm
POS
-
STL
16h 06m
2 stops
United Airlines Logo
7:25 am - 11:23 pm
STL
-
POS
14h 58m
2 stops
$796United Airlines
Sat, Aug 22 - Sat, Aug 29
United Airlines Logo
12:30 am - 2:15 pm
POS
-
STL
14h 45m
1 stop
United Airlines Logo
7:25 am - 12:50 am
STL
-
POS
16h 25m
2 stops
$798United Airlines
Sat, Aug 22 - Sat, Aug 29
Multiple Airlines Logo
1:25 am - 6:42 pm
POS
-
STL
18h 17m
3 stops
Multiple Airlines Logo
8:55 am - 2:05 am
STL
-
POS
16h 10m
2 stops
$1,497Multiple Airlines
Wed, Jul 8 - Fri, Jul 24
Multiple Airlines Logo
7:35 am - 8:22 pm
POS
-
STL
37h 47m
3 stops
Multiple Airlines Logo
12:10 pm - 12:15 am
STL
-
POS
35h 05m
2 stops
$2,849Multiple Airlines
Sun, Aug 23 - Sat, Aug 29

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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
Jul 8
POS12:30 amPort of Spain Piarco Intl
10h 37m
1 stop
STL10:07 amLambert-St Louis
Jul 24
STL11:10 amLambert-St Louis
11h 13m
1 stop
POS11:23 pmPort of Spain Piarco Intl
$715
United Airlines
Jul 8
POS12:30 amPort of Spain Piarco Intl
10h 37m
1 stop
STL10:07 amLambert-St Louis
Jul 24
STL6:00 amLambert-St Louis
17h 50m
2 stops
POS12:50 amPort of Spain Piarco Intl
$718
United Airlines
Aug 22
POS2:00 amPort of Spain Piarco Intl
10h 16m
1 stop
STL11:16 amLambert-St Louis
Aug 29
STL7:00 amLambert-St Louis
16h 50m
1 stop
POS12:50 amPort 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 June 15, 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

Cheapest round-trip
Quickest round-trip

Port of SpainSt. Louis

POS - STL

POSSTL

Port of Spain Piarco Intl

Wed 7/8

12:30 am-10:07 am

1 stop10h 37m

Lambert-St Louis

Fri 7/24

11:10 am-11:23 pm

1 stop11h 13m

$715

Port of SpainSt. Louis

POS - STL

POSSTL

Port of Spain Piarco Intl

Wed 7/8

12:30 am-10:07 am

1 stop10h 37m

Lambert-St Louis

Fri 7/24

6:00 am-12:50 am

2 stops17h 50m

$718

Port of SpainSt. Louis

POS - STL

POSSTL

Port of Spain Piarco Intl

Thu 7/9

3:18 pm-8:33 am

2 stops18h 15m

Lambert-St Louis

Fri 7/24

6:14 am-10:33 pm

2 stops15h 19m

$747

Port of SpainSt. Louis

POS - STL

POSSTL

Port of Spain Piarco Intl

Sat 8/22

2:00 am-11:16 am

1 stop10h 16m

Lambert-St Louis

Sat 8/29

7:00 am-12:50 am

1 stop16h 50m

$793

Port of SpainSt. Louis

POS - STL

POSSTL

Port of Spain Piarco Intl

Sat 8/22

2:00 am-5:06 pm

2 stops16h 06m

Lambert-St Louis

Sat 8/29

7:25 am-11:23 pm

2 stops14h 58m

$796

Port of SpainSt. Louis

POS - STL

POSSTL

Port of Spain Piarco Intl

Sat 8/22

12:30 am-2:15 pm

1 stop14h 45m

Lambert-St Louis

Sat 8/29

7:25 am-12:50 am

2 stops16h 25m

$798

Port of SpainSt. Louis

POS - STL

POSSTL

Port of Spain Piarco Intl

Wed 7/8

1:25 am-6:42 pm

3 stops18h 17m

Lambert-St Louis

Fri 7/24

8:55 am-2:05 am

2 stops16h 10m

$1,497

Port of SpainSt. Louis

POS - STL

POSSTL

Port of Spain Piarco Intl

Sun 8/23

7:35 am-8:22 pm

3 stops37h 47m

Lambert-St Louis

Sat 8/29

12:10 pm-12:15 am

2 stops35h 05m

$2,849
Cheapest one-way
Quickest one-way

Port of SpainSt. Louis

POS - STL

POSSTL

Port of Spain Piarco Intl

Mon 6/22

1:25 am-12:21 pm

1 stop11h 56m

$341

Port of SpainSt. Louis

POS - STL

POSSTL

Port of Spain Piarco Intl

Mon 6/22

1:25 am-8:25 pm

2 stops20h 00m

$344

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 12 resultsSorted by cheapest first
1
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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

What is the cheapest airline that flies from Port of Spain Piarco Intl to Lambert-St Louis?

Air Canada is the most popular carrier operating from Port of Spain Piarco Intl to Lambert-St Louis

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

23h 42m

Direct flights

None
The fastest flight from Port of Spain to St. Louis takes 23h 42m
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.
Search flight deals

Frequently asked questions about flying from Port of Spain to St. Louis

  • 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 23h 42m.

  • 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 many operators does momondo search for flights from Port of Spain Piarco Intl Airport to Lambert-St Louis Airport?

  • 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.

  • What is the most popular airline from Port of Spain to St. Louis?

Best airlines flying from Port of Spain to St. Louis

Compare and see reviews for airlines that fly from Port of Spain to St. Louis with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $640Free CancellationRating
7.4
9,831 reviews
Search United Airlines flights

Traveling to a place near St. Louis?

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

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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