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Cheap flights from St. Louis to Port of Spain from $579

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 12/5. 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.
United Airlines Logo
6:15 am - 12:23 amSTL-POS
16h 08m1 stop
United Airlines Logo
1:30 am - 10:04 amPOS-STL
10h 34m1 stop
$579United Airlines
Find Deal
Fri, Dec 5 - Thu, Dec 11
United Airlines Logo
10:00 am - 12:23 amSTL-POS
12h 23m2 stops
United Airlines Logo
1:30 am - 10:04 amPOS-STL
10h 34m1 stop
$583United Airlines
Find Deal
Fri, Dec 5 - Thu, Dec 11
Multiple Airlines Logo
6:21 pm - 8:00 pmSTL-POS
23h 39m1 stop
Multiple Airlines Logo
10:10 am - 2:29 pmPOS-STL
30h 19m2 stops
$635Multiple Airlines
Find Deal
Sun, Nov 16 - Mon, Nov 24
American Airlines Logo
5:10 am - 11:59 pmSTL-POS
16h 49m1 stop
American Airlines Logo
7:10 am - 11:59 pmPOS-STL
18h 49m1 stop
$649American Airlines
Find Deal
Fri, Dec 5 - Fri, Dec 12
United Airlines Logo
5:27 pm - 12:23 amSTL-POS
28h 56m3 stops
United Airlines Logo
1:30 am - 5:03 pmPOS-STL
17h 33m2 stops
$693United Airlines
Find Deal
Fri, Dec 5 - Thu, Dec 11
United Airlines Logo
4:35 pm - 12:23 amSTL-POS
29h 48m1 stop
United Airlines Logo
2:20 am - 10:41 amPOS-STL
10h 21m1 stop
$699United Airlines
Find Deal
Sat, Feb 7 - Tue, Feb 10
United Airlines Logo
4:35 pm - 12:23 amSTL-POS
29h 48m1 stop
United Airlines Logo
1:30 am - 12:29 pmPOS-STL
12h 59m2 stops
$703United Airlines
Find Deal
Sat, Feb 7 - Tue, Feb 10
Multiple Airlines Logo
6:21 pm - 8:00 pmSTL-POS
23h 39m1 stop
Multiple Airlines Logo
12:10 am - 11:57 pmPOS-STL
25h 47m2 stops
$712Multiple Airlines
Find Deal
Sun, Nov 16 - Sat, Nov 22
American Airlines Logo
7:00 am - 11:39 pmSTL-POS
14h 39m2 stops
American Airlines Logo
7:19 am - 11:07 pmPOS-STL
17h 48m2 stops
$828American Airlines
Find Deal
Sun, Nov 16 - Mon, Nov 24
Air Canada Logo
4:05 pm - 1:20 amSTL-POS
31h 15m1 stop
Air Canada Logo
2:20 am - 3:29 pmPOS-STL
15h 09m1 stop
$1,171Air Canada
Find Deal
Wed, Feb 11 - Tue, Feb 17

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
Dec 5
STL6:15 amLambert-St Louis
16h 08m
1 stop
POS12:23 amPort of Spain Piarco Intl
Dec 11
POS1:30 amPort of Spain Piarco Intl
10h 34m
1 stop
STL10:04 amLambert-St Louis
$579
Find similar
United Airlines
Dec 5
STL10:00 amLambert-St Louis
12h 23m
2 stops
POS12:23 amPort of Spain Piarco Intl
Dec 11
POS1:30 amPort of Spain Piarco Intl
10h 34m
1 stop
STL10:04 amLambert-St Louis
$583
Find similar
United Airlines
Dec 5
STL5:27 pmLambert-St Louis
28h 56m
3 stops
POS12:23 amPort of Spain Piarco Intl
Dec 11
POS1:30 amPort of Spain Piarco Intl
17h 33m
2 stops
STL5:03 pmLambert-St Louis
$693
Find similar

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
Dec 5
STL5:10 amLambert-St Louis
16h 49m
1 stop
POS11:59 pmPort of Spain Piarco Intl
Dec 12
POS7:10 amPort of Spain Piarco Intl
18h 49m
1 stop
STL11:59 pmLambert-St Louis
$649
Find similar
American Airlines
Nov 16
STL7:00 amLambert-St Louis
14h 39m
2 stops
POS11:39 pmPort of Spain Piarco Intl
Nov 24
POS7:19 amPort of Spain Piarco Intl
17h 48m
2 stops
STL11:07 pmLambert-St Louis
$828
Find similar
American Airlines
Nov 16
STL5:15 amLambert-St Louis
16h 24m
1 stop
POS11:39 pmPort of Spain Piarco Intl
Nov 23
POS7:19 amPort of Spain Piarco Intl
17h 15m
1 stop
STL10:34 pmLambert-St Louis
$829
Find similar

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 November 5, 2025.
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

Fri 12/5

6:15 am-12:23 am

1 stop16h 08m

Port of Spain Piarco Intl

Thu 12/11

1:30 am-10:04 am

1 stop10h 34m

$579

St. LouisPort of Spain

STL - POS

STLPOS

Lambert-St Louis

Fri 12/5

10:00 am-12:23 am

2 stops12h 23m

Port of Spain Piarco Intl

Thu 12/11

1:30 am-10:04 am

1 stop10h 34m

$583

St. LouisPort of Spain

STL - POS

STLPOS

Lambert-St Louis

Sun 11/16

6:21 pm-8:00 pm

1 stop23h 39m

Port of Spain Piarco Intl

Mon 11/24

10:10 am-2:29 pm

2 stops30h 19m

$635

St. LouisPort of Spain

STL - POS

STLPOS

Lambert-St Louis

Fri 12/5

5:10 am-11:59 pm

1 stop16h 49m

Port of Spain Piarco Intl

Fri 12/12

7:10 am-11:59 pm

1 stop18h 49m

$649

St. LouisPort of Spain

STL - POS

STLPOS

Lambert-St Louis

Fri 12/5

5:27 pm-12:23 am

3 stops28h 56m

Port of Spain Piarco Intl

Thu 12/11

1:30 am-5:03 pm

2 stops17h 33m

$693

St. LouisPort of Spain

STL - POS

STLPOS

Lambert-St Louis

Sat 2/7

4:35 pm-12:23 am

1 stop29h 48m

Port of Spain Piarco Intl

Tue 2/10

2:20 am-10:41 am

1 stop10h 21m

$699

St. LouisPort of Spain

STL - POS

STLPOS

Lambert-St Louis

Sat 2/7

4:35 pm-12:23 am

1 stop29h 48m

Port of Spain Piarco Intl

Tue 2/10

1:30 am-12:29 pm

2 stops12h 59m

$703

St. LouisPort of Spain

STL - POS

STLPOS

Lambert-St Louis

Sun 11/16

6:21 pm-8:00 pm

1 stop23h 39m

Port of Spain Piarco Intl

Sat 11/22

12:10 am-11:57 pm

2 stops25h 47m

$712

St. LouisPort of Spain

STL - POS

STLPOS

Lambert-St Louis

Sun 11/16

7:00 am-11:39 pm

2 stops14h 39m

Port of Spain Piarco Intl

Mon 11/24

7:19 am-11:07 pm

2 stops17h 48m

$828

St. LouisPort of Spain

STL - POS

STLPOS

Lambert-St Louis

Wed 2/11

4:05 pm-1:20 am

1 stop31h 15m

Port of Spain Piarco Intl

Tue 2/17

2:20 am-3:29 pm

1 stop15h 09m

$1,171

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to Port of Spain from

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

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 day to depart on your flight to Port of Spain?

The cheapest day to depart from St. Louis to Port of Spain is on a Monday when prices can be found for as low as $662. Flights from St. Louis to Port of Spain on a Friday will generally be more expensive and average around $861. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

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

Direct flights

None
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 10h 48m.

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

  • 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.

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

Best airlines flying from St. Louis to Port of Spain

Compare and see reviews for airlines that fly from St. Louis to Port of Spain with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $558Free CancellationRating
7.2
11,042 reviews
Search American Airlines flights

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.

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