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Cheap flights from St. Louis to Port of Spain from $661

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 Port of Spain departing on 5/8. 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.
American Airlines Logo
6:54 pm - 2:32 pm
STL
-
POS
18h 38m
2 stops
American Airlines Logo
3:47 pm - 8:27 am
POS
-
STL
17h 40m
2 stops
$661American Airlines
Fri, May 8 - Fri, May 15
American Airlines Logo
5:24 am - 2:32 pm
STL
-
POS
8h 08m
1 stop
American Airlines Logo
3:47 pm - 8:30 am
POS
-
STL
17h 43m
2 stops
$732American Airlines
Fri, May 8 - Fri, May 15
United Airlines Logo
6:00 am - 11:23 pm
STL
-
POS
16h 23m
1 stop
United Airlines Logo
12:30 am - 9:30 am
POS
-
STL
10h 00m
1 stop
$880United Airlines
Mon, May 4 - Tue, May 5
United Airlines Logo
7:45 am - 11:23 pm
STL
-
POS
14h 38m
2 stops
United Airlines Logo
12:30 am - 10:45 pm
POS
-
STL
23h 15m
2 stops
$884United Airlines
Mon, May 4 - Tue, May 5
Multiple Airlines Logo
2:15 pm - 12:15 am
STL
-
POS
9h 00m
1 stop
Multiple Airlines Logo
2:55 pm - 12:06 pm
POS
-
STL
22h 11m
1 stop
$1,027Multiple Airlines
Fri, May 8 - Fri, May 15
Multiple Airlines Logo
1:05 pm - 4:40 am
STL
-
POS
14h 35m
2 stops
Multiple Airlines Logo
10:00 pm - 10:45 pm
POS
-
STL
25h 45m
3 stops
$1,660Multiple Airlines
Fri, May 8 - Fri, May 15

United Airlines flights from St. Louis to Port of Spain

Our best United Airlines deals on St. Louis to Port of Spain flight tickets
United Airlines
May 4
STL6:00 amLambert-St Louis
16h 23m
1 stop
POS11:23 pmPort of Spain Piarco Intl
May 5
POS12:30 amPort of Spain Piarco Intl
10h 00m
1 stop
STL9:30 amLambert-St Louis
$880
United Airlines
May 4
STL7:45 amLambert-St Louis
14h 38m
2 stops
POS11:23 pmPort of Spain Piarco Intl
May 5
POS12:30 amPort of Spain Piarco Intl
23h 15m
2 stops
STL10:45 pmLambert-St Louis
$884

American Airlines flights from St. Louis to Port of Spain

Our best American Airlines deals on St. Louis to Port of Spain flight tickets
American Airlines
May 8
STL6:54 pmLambert-St Louis
18h 38m
2 stops
POS2:32 pmPort of Spain Piarco Intl
May 15
POS3:47 pmPort of Spain Piarco Intl
17h 40m
2 stops
STL8:27 amLambert-St Louis
$661
American Airlines
May 8
STL5:24 amLambert-St Louis
8h 08m
1 stop
POS2:32 pmPort of Spain Piarco Intl
May 15
POS3:47 pmPort of Spain Piarco Intl
17h 43m
2 stops
STL8:30 amLambert-St Louis
$732

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Port of Spain 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 St. Louis to Port of Spain that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisPort of Spain

STL - POS

STLPOS

Lambert-St Louis

Fri 5/8

6:54 pm-2:32 pm

2 stops18h 38m

Port of Spain Piarco Intl

Fri 5/15

3:47 pm-8:27 am

2 stops17h 40m

$661
Quickest round-trip

St. LouisPort of Spain

STL - POS

STLPOS

Lambert-St Louis

Fri 5/8

5:24 am-2:32 pm

1 stop8h 08m

Port of Spain Piarco Intl

Fri 5/15

3:47 pm-8:30 am

2 stops17h 43m

$732

St. LouisPort of Spain

STL - POS

STLPOS

Lambert-St Louis

Mon 5/4

6:00 am-11:23 pm

1 stop16h 23m

Port of Spain Piarco Intl

Tue 5/5

12:30 am-9:30 am

1 stop10h 00m

$880

St. LouisPort of Spain

STL - POS

STLPOS

Lambert-St Louis

Mon 5/4

7:45 am-11:23 pm

2 stops14h 38m

Port of Spain Piarco Intl

Tue 5/5

12:30 am-10:45 pm

2 stops23h 15m

$884

St. LouisPort of Spain

STL - POS

STLPOS

Lambert-St Louis

Fri 5/8

2:15 pm-12:15 am

1 stop9h 00m

Port of Spain Piarco Intl

Fri 5/15

2:55 pm-12:06 pm

1 stop22h 11m

$1,027

St. LouisPort of Spain

STL - POS

STLPOS

Lambert-St Louis

Fri 5/8

1:05 pm-4:40 am

2 stops14h 35m

Port of Spain Piarco Intl

Fri 5/15

10:00 pm-10:45 pm

3 stops25h 45m

$1,660

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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

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

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

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

Fastest flight time

41h 57m

Direct flights

None
The fastest flight from St. Louis to Port of Spain takes 41h 57m
There are no direct flights from St. Louis to Port of Spain. There are no popular flight routes from St. Louis to Port of Spain.
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  • How far is Lambert-St Louis to Port of Spain Piarco Intl by plane?

    Port of Spain Piarco Intl is 2617.4 mi away from Lambert-St Louis. A reasonable flight in good conditions will take 41h 57m.

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

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

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

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Lambert-St Louis Airport to Port of Spain Piarco Intl Airport.

  • What documentation or ID do you need to fly to Port of Spain Piarco Intl Airport?

    The travel and health documents you'll need for your trip to Port of Spain Piarco Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Port of Spain Piarco Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • How do I get Price Alerts for flights from St. Louis to Port of Spain?

    You can take advantage of momondo’s Price Alerts by first searching for your flights to St. Louis from Port of Spain. Flight offers will be shown to you in real-time. From there you can create a Price Alert by using our on-site widget.

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

    Leverage our AI within our “Price Forecast” tool, which predicts if it’s better to book now or wait until prices decrease. You can strategically pick the best days to fly and save money on your trip by using our “Price Calendar” tool. “Explore” shows an overview of how much it costs to fly to anywhere from a selected city or airport. Our “Discover” content is a great option for travel inspiration and money-saving tips, while “Price Alerts” will update you when prices change, so you can book when fares are right.

  • How does momondo find its flight prices?

    We show prices from over 700+ competitors with a single click. With options from airlines and OTAs from across our 30 international markets, we are able to show you a diverse range of deals to create your adventure.

Traveling to a place near Port of Spain?

Book flights to Port of Spain if you plan to visit one of these locations
Piarco

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Port of Spain from St. Louis.

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

Yes. All flights to Port of Spain from St. Louis on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from St. Louis to Port of Spain.

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

Yes. momondo can track prices for St. Louis to Port of Spain flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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