The cheapest times to fly from POS to ONT are

  • January 8th to February 4th
  • March 5th to May 13th (except the weeks of March 12th and April 30th)
  • October 8th to December 9th

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 ONT is late January. Prices can be as high as $932 for Sunday flights during early August, or as low as $510 for Tuesday flights around late January.


When to Fly to Ontario

Flying from Port of Spain (POS) to Ontario, CA (ONT) will usually cost between $578 to $795 per person if booking more than four weeks in advance. On average the very cheapest time to fly is late January with an average ticket price of $549. Due to high demand the most expensive time to fly is early August, with an average price of $851. Planning your trip to low-cost times can easily save you $302 on economy flights and even more on first-class flights. Generally, any price below $648 can be considered a good price for a round-trip POS to ONT flight.

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

POS to ONT Flight Prices

Compared to other flights, the POS to ONT 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 $0.1, which is far below average.


Flight Prices by Day of the Week

Tuesday is usually the cheapest day to depart and return on this flight. Sundays are the most expensive days to fly to Ontario, and Fridays are the most expensive days to return to Port of Spain. Selecting flights on the least expensive days could save you up to $93 (13%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Tuesday and returning a week later will cost an average of $613. Return trip prices are from the ONT 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 ONT can generally find a 1-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 7 hour 59 minutes may not be realistic.


Alternative Nearby Airports

Champion Traveler tells you which airports are nearby and whether tickets might be cheaper alternative airports nearby. Sometimes it’s worth it to fly into a closer airport and then commute to your destination. Remember that there is not usually a nonstop flight from POS to ONT while comparing.

Destination alternative #1: Los Angeles International Airport (LAX) in Los Angeles, CA

  • 47 miles (76 km) away from ONT
  • Usually 18.29% less expensive than ONT
  • 1-layover flights available

See POS to LAX flights


Flight Questions Answered

Still have questions about flying from POS to ONT? 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, Delta, JetBlue, United, and potentially more during busy seasons.

How far away is it from Ontario International Airport to Piarco Airport?

The distance between the two airports is roughly 3887 miles or 6256 kilometers.

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

The real-world flight time for a nonstop POS to ONT flight is about 7 hour 59 minutes.

How many flights go between Port of Spain and Ontario, CA?

It depends on the day of the week and the date, but a typical day might have around 18 available flights from POS to ONT.


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 ONT
Destination airport name Ontario International Airport
City Ontario, CA
Country the United States
Latitude 34.1
Longitude -117.6


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.