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Cheap flights from St. Louis to Port of Spain from $677

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 3/23. 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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Find the cheapest flights from St. Louis to Port of Spain

Cheap round-trip flights

Enter your travel dates to find the best prices.
Air Canada Logo
4:05 pm - 12:20 am
STL
-
POS
31h 15m
1 stop
Air Canada Logo
1:20 am - 3:29 pm
POS
-
STL
15h 09m
1 stop
$677Air Canada
Mon, Mar 23 - Thu, Mar 26
Air Canada Logo
4:05 pm - 12:20 am
STL
-
POS
31h 15m
1 stop
Air Canada Logo
1:20 am - 9:05 pm
POS
-
STL
44h 45m
2 stops
$781Air Canada
Mon, Mar 23 - Thu, Mar 26
United Airlines Logo
8:17 am - 11:23 pm
STL
-
POS
14h 06m
2 stops
United Airlines Logo
12:30 am - 9:58 pm
POS
-
STL
22h 28m
2 stops
$824United Airlines
Mon, Mar 23 - Thu, Mar 26
United Airlines Logo
7:40 am - 11:23 pm
STL
-
POS
14h 43m
2 stops
United Airlines Logo
12:30 am - 2:43 pm
POS
-
STL
15h 13m
2 stops
$1,058United Airlines
Mon, Mar 23 - Thu, Mar 26

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
Mar 23
STL7:00 pmLambert-St Louis
27h 23m
2 stops
POS11:23 pmPort of Spain Piarco Intl
Mar 26
POS12:30 amPort of Spain Piarco Intl
18h 30m
2 stops
STL6:00 pmLambert-St Louis
$824
United Airlines
Mar 23
STL7:40 amLambert-St Louis
14h 43m
2 stops
POS11:23 pmPort of Spain Piarco Intl
Mar 26
POS12:30 amPort of Spain Piarco Intl
15h 13m
2 stops
STL2:43 pmLambert-St Louis
$1,058

Air Canada flights from St. Louis to Port of Spain

Our best Air Canada deals on St. Louis to Port of Spain flight tickets
Air Canada
Mar 23
STL4:05 pmLambert-St Louis
31h 15m
1 stop
POS12:20 amPort of Spain Piarco Intl
Mar 26
POS1:20 amPort of Spain Piarco Intl
15h 09m
1 stop
STL3:29 pmLambert-St Louis
$677
Air Canada
Mar 23
STL4:05 pmLambert-St Louis
31h 15m
1 stop
POS12:20 amPort of Spain Piarco Intl
Mar 26
POS1:20 amPort of Spain Piarco Intl
44h 45m
2 stops
STL9:05 pmLambert-St Louis
$781

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 February 14, 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

St. LouisPort of Spain

STL - POS

STLPOS

Lambert-St Louis

Mon 3/23

4:05 pm-12:20 am

1 stop31h 15m

Port of Spain Piarco Intl

Thu 3/26

1:20 am-3:29 pm

1 stop15h 09m

$677

St. LouisPort of Spain

STL - POS

STLPOS

Lambert-St Louis

Mon 3/23

4:05 pm-12:20 am

1 stop31h 15m

Port of Spain Piarco Intl

Thu 3/26

1:20 am-9:05 pm

2 stops44h 45m

$781

St. LouisPort of Spain

STL - POS

STLPOS

Lambert-St Louis

Mon 3/23

8:17 am-11:23 pm

2 stops14h 06m

Port of Spain Piarco Intl

Thu 3/26

12:30 am-9:58 pm

2 stops22h 28m

$824

St. LouisPort of Spain

STL - POS

STLPOS

Lambert-St Louis

Mon 3/23

7:40 am-11:23 pm

2 stops14h 43m

Port of Spain Piarco Intl

Thu 3/26

12:30 am-2:43 pm

2 stops15h 13m

$1,058

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

19h 04m

Direct flights

None
The fastest flight from St. Louis to Port of Spain takes 19h 04m
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 19h 04m.

  • 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?

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