The cheapest times to fly from POS to STL are

  • January 8th to February 4th
  • April 30th to July 22nd
  • August 27th to October 28th

based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from POS to STL is early October. Prices can be as high as $1268 for Saturday flights during early to mid December, or as low as $507 for Friday flights around early October.


When to Fly to St. Louis

Flying from Port of Spain (POS) to St. Louis, MO (STL) will usually cost between $536 to $874 per person if booking more than four weeks in advance. On average the very cheapest time to fly is early October with an average ticket price of $658. Due to high demand the most expensive time to fly is early to mid December, with an average price of $997. Planning your trip to low-cost times can easily save you $338 on economy flights and even more on first-class flights. Generally, any price below $748 can be considered a good price for a round-trip POS to STL flight.

See below for a graph of average weekly prices for the POS to STL route. All prices are for round-trip tickets in USD.

POS to STL Flight Prices

Compared to other flights, the POS to STL flight is cheaper than the average and costs less than the average flight leaving from Port of Spain. The average price per mile (for a direct flight) is $0.18, which is below average.


Flight Prices by Day of the Week

Friday is usually the cheapest day to depart and return on this flight. Saturdays are the most expensive days to fly out or take a return trip. Selecting flights on the least expensive days could save you up to $112 (14%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Friday and returning a week later will cost an average of $655. Return trip prices are from the STL to POS flight, and often highlight the quality of our data in showing the same trend.

Departing Prices by Day

Departure Day Prices

Return Trip Prices by Day

Return Day Prices


Nonstop Flights and Layovers

Travelers looking to fly from POS to STL can generally find a 1-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 5 hour 44 minutes may not be realistic.


Flight Hacking POS to STL

Flight hacking is when you book two tickets instead of a layover, sometimes with different airlines. You will need to either bring only a carry-on bag (highly recommended) or leave yourself plenty of time to go through security again. Flight hacking is completely allowed, but airlines don’t always tell you the cheapest way to get from POS to STL — but Champion Traveler does!

Hack #1: Miami, FL (POS > MIA > STL)

  • Price for both tickets: $620
  • Average savings: $128 (17.06%)

See POS to FLL flights

Hack #2: Fort Lauderdale, FL (POS > FLL > STL)

  • Price for both tickets: $669
  • Average savings: $79 (10.5%)

See POS to MIA flights

Hack #3: Atlanta, GA (POS > ATL > STL)

  • Price for both tickets: $685
  • Average savings: $63 (8.36%)

See POS to ATL flights


Flight Questions Answered

Still have questions about flying from POS to STL? We’ve got answers.

Which airlines fly this route?

You can find 7 major airlines flying this route most often: Air Canada, American, Caribbean Airlines, COPA, SAS, United, WestJet, and potentially more during busy seasons.

How far away is it from St Louis Lambert International Airport to Piarco Airport?

The distance between the two airports is roughly 2642 miles or 4252 kilometers.

How long does it take to fly from POS to STL?

The real-world flight time for a nonstop POS to STL flight is about 5 hour 44 minutes.

How many flights go between Port of Spain and St. Louis, MO?

It depends on the day of the week and the date, but a typical day might have around 22 available flights from POS to STL.


Airport Location Info


Departing Airport

Origination code POS
Origination airport name Piarco Airport
City Port of Spain
Country Trinidad and Tobago
Latitude 10.6
Longitude -61.3

Return Airport

Destination code STL
Destination airport name St Louis Lambert International Airport
City St. Louis, MO
Country the United States
Latitude 38.7
Longitude -90.4


Other Resources

Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.