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$311+ Cheap flights from Port of Spain (POS) to St. Louis (STL)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/7. Fares are subject to change and may not be available on all flights or dates of travel.
POS — STL
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap flight deals from Port of Spain to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Port of Spain (POS) to St. Louis (STL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 11, 2025.

Round-trip from

$452
(Gotogate)

One-way from

$311
(Kiwi.com)

Popular in

January

Cheapest in

July

Average price

$612
From Port of Spain Piarco Intl to Lambert-St Louis
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One-way flight from Port of Spain Piarco Intl to Lambert-St Louis
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Highest demand for flights based on searches. 10% potential increase in price ($77 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($41 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Port of Spain to St. Louis

Cheapest flights from Port of Spain to St. Louis
Explore the most affordable flight options available from Port of Spain to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

This Gotogate deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/132:25 amPOS - STL
1 stop18h 18mAir Canada
Sat 10/258:20 pmSTL - POS
1 stop26h 50mAir Canada
Deal found 9/10$452
This Orbitz deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/262:25 amPOS - STL
1 stop18h 13mAir Canada
Sat 10/111:30 pmSTL - POS
2 stops34h 50mAir Canada
Deal found 9/10$471
This Kiwi.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/1312:10 amPOS - STL
2 stops33h 57mMultiple Airlines
Sat 10/257:15 pmSTL - POS
1 stop23h 45mMultiple Airlines
Deal found 9/10$551
This Mytrip deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/262:25 amPOS - STL
3 stops32h 15mMultiple Airlines
Sat 10/111:30 pmSTL - POS
2 stops34h 50mMultiple Airlines
Deal found 9/10$604
This American Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/147:00 amPOS - STL
1 stop17h 56mAmerican Airlines
Sat 10/255:23 amSTL - POS
1 stop14h 57mAmerican Airlines
Deal found 9/10$635
This American Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/257:00 amPOS - STL
1 stop17h 56mAmerican Airlines
Fri 10/315:11 amSTL - POS
2 stops15h 09mAmerican Airlines
Deal found 9/10$639
This United Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/2412:30 amPOS - STL
1 stop10h 22mUnited Airlines
Tue 10/1411:06 amSTL - POS
1 stop11h 17mUnited Airlines
Deal found 9/10$640
This American Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/253:25 pmPOS - STL
2 stops22h 47mAmerican Airlines
Tue 10/145:20 amSTL - POS
2 stops15h 00mAmerican Airlines
Deal found 9/10$645
This United Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/2412:30 amPOS - STL
1 stop16h 58mUnited Airlines
Fri 10/318:00 amSTL - POS
2 stops14h 23mUnited Airlines
Deal found 9/10$647

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated September 11, 2025.
Use the filters below to find and compare flights from Port of Spain to St. Louis that are best for you.

Fly from

Port of Spain

Fly to

St. Louis

Route

Depart

Return

Price

Port of SpainSt. Louis

POS - STL

POSSTL

Port of Spain Piarco Intl

Fri 9/26

2:25 am-7:57 pm

2 stops18h 32m

Lambert-St Louis

Sat 10/11

1:30 pm-1:20 am

2 stops34h 50m

$471

Port of SpainSt. Louis

POS - STL

POSSTL

Port of Spain Piarco Intl

Mon 10/13

12:10 am-9:07 am

2 stops33h 57m

Lambert-St Louis

Sat 10/25

7:15 pm-8:00 pm

1 stop23h 45m

$551

Port of SpainSt. Louis

POS - STL

POSSTL

Port of Spain Piarco Intl

Tue 10/14

7:00 am-11:56 pm

1 stop17h 56m

Lambert-St Louis

Sat 10/25

5:23 am-9:20 pm

1 stop14h 57m

$635

Port of SpainSt. Louis

POS - STL

POSSTL

Port of Spain Piarco Intl

Sat 2/28

1:30 am-9:42 am

1 stop10h 12m

Lambert-St Louis

Tue 3/3

8:50 am-12:23 am

1 stop13h 33m

$637

Port of SpainSt. Louis

POS - STL

POSSTL

Port of Spain Piarco Intl

Wed 9/24

12:30 am-9:52 am

1 stop10h 22m

Lambert-St Louis

Tue 10/14

5:28 pm-11:23 pm

2 stops28h 55m

$642

Port of SpainSt. Louis

POS - STL

POSSTL

Port of Spain Piarco Intl

Thu 9/25

3:25 pm-1:12 pm

2 stops22h 47m

Lambert-St Louis

Tue 10/14

5:20 am-9:20 pm

2 stops15h 00m

$645

Port of SpainSt. Louis

POS - STL

POSSTL

Port of Spain Piarco Intl

Tue 10/7

3:51 am-10:37 am

3 stops31h 46m

$311

Port of SpainSt. Louis

POS - STL

POSSTL

Port of Spain Piarco Intl

Wed 10/8

3:25 pm-11:56 pm

1 stop9h 31m

$400

Port of SpainSt. Louis

POS - STL

POSSTL

Port of Spain Piarco Intl

Tue 10/7

12:30 am-6:57 pm

1 stop19h 27m

$403

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Best time to book a flight from Port of Spain to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Port of Spain with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Related info for your journey

Find useful and relevant information for your journey from Port of Spain to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Port of Spain to St. Louis?

    There are many flights that can get you from Port of Spain to St. Louis in 17h 56m. Fly via Air Canada or American Airlines to get the fastest option. Port of Spain and St. Louis are separated by a distance of 2641 mi. This flight may include one or multiple stops.

  • Can I find deals for flights from Port of Spain to St. Louis that include hotel bookings?

    Yes. In addition to deals on Port of Spain to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Port of Spain to St. Louis?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Port of Spain to St. Louis.

  • Can I find deals for business class flights from Port of Spain to St. Louis?

    Yes. Cheapflights offers flight deals from Port of Spain to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Port of Spain to St. Louis?

    Currently, August is the cheapest month in which you can book a flight from Port of Spain to St. Louis (average of $311). Flying from Port of Spain to St. Louis in March is currently the most expensive (average of $356). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
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O'Fallon
Fairview Heights
Maryland Heights
Collinsville
Eureka
Glencoe
St. Peters
Chesterfield
Alton
Farmington
Festus

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