$173 Cheap Flights from Washington (IAD) to Port of Spain (POS)

View $173 flight on Fri, Feb 6, 2026Opens in a new window

Popular airlines from Washington Dulles Intl. Airport (IAD) to Piarco Intl. Airport (POS)

  • Plan, book, fly with confidence

  • trending down icon

    Be in the know

    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon

    Book smarter

    Save up to 30% on select hotels after you book a flight*
  • one key icon

    Earn twice

    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

Cheap Flights from Washington to Port of Spain (IAD-POS)

Prices were available within the past 7 days and start at $173 for one-way flights and $352 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Copa
Wed, May 13 - Sat, May 16
IAD
Washington
POS
Trinidad
$352 Roundtrip, just found
$352
Roundtrip
just found
Select Copa flight, departing Wed, May 13 from Washington to Trinidad, returning Sat, May 16, priced at $352 just found
Copa
Wed, Oct 29 - Wed, Nov 12
IAD
Washington
POS
Trinidad
$367 Roundtrip, found 4 hours ago
$367
Roundtrip
found 4 hours ago
Select Copa flight, departing Wed, Oct 29 from Washington to Trinidad, returning Wed, Nov 12, priced at $367 found 4 hours ago
Copa
Tue, Oct 14 - Fri, Oct 17
IAD
Washington
POS
Trinidad
$372 Roundtrip, found 1 day ago
$372
Roundtrip
found 1 day ago
Select Copa flight, departing Tue, Oct 14 from Washington to Trinidad, returning Fri, Oct 17, priced at $372 found 1 day ago
United
Sun, Dec 7 - Sun, Dec 14
IAD
Washington
POS
Trinidad
$378 Roundtrip, found 1 day ago
$378
Roundtrip
found 1 day ago
Select United flight, departing Sun, Dec 7 from Washington to Trinidad, returning Sun, Dec 14, priced at $378 found 1 day ago
American Airlines
Fri, Jan 9 - Wed, Jan 14
IAD
Washington
POS
Trinidad
$383 Roundtrip, found 3 hours ago
$383
Roundtrip
found 3 hours ago
Select American Airlines flight, departing Fri, Jan 9 from Washington to Trinidad, returning Wed, Jan 14, priced at $383 found 3 hours ago
Copa
Fri, Oct 24 - Wed, Oct 29
IAD
Washington
POS
Trinidad
$387 Roundtrip, found 2 days ago
$387
Roundtrip
found 2 days ago
Select Copa flight, departing Fri, Oct 24 from Washington to Trinidad, returning Wed, Oct 29, priced at $387 found 2 days ago
United
Fri, Jan 9 - Wed, Jan 14
IAD
Washington
POS
Trinidad
$389 Roundtrip, found 3 hours ago
$389
Roundtrip
found 3 hours ago
Select United flight, departing Fri, Jan 9 from Washington to Trinidad, returning Wed, Jan 14, priced at $389 found 3 hours ago
American Airlines
Fri, Jan 30 - Tue, Feb 3
IAD
Washington
POS
Trinidad
$389 Roundtrip, found 2 days ago
$389
Roundtrip
found 2 days ago
Select American Airlines flight, departing Fri, Jan 30 from Washington to Trinidad, returning Tue, Feb 3, priced at $389 found 2 days ago
United
Thu, Oct 23 - Thu, Oct 30
IAD
Washington
POS
Trinidad
$393 Roundtrip, found 2 days ago
$393
Roundtrip
found 2 days ago
Select United flight, departing Thu, Oct 23 from Washington to Trinidad, returning Thu, Oct 30, priced at $393 found 2 days ago
Air Canada
Sat, Jan 24 - Sat, Jan 31
IAD
Washington
POS
Trinidad
$433 Roundtrip, found 1 day ago
$433
Roundtrip
found 1 day ago
Select Air Canada flight, departing Sat, Jan 24 from Washington to Trinidad, returning Sat, Jan 31, priced at $433 found 1 day ago

Find the cheapest month to fly from Washington (IAD) to Piarco (POS)

March is typically the cheapest month to fly

From $309 - $2,398 per traveler.

Frequently asked questions

How much does a flight from Washington Dulles Intl. Airport (IAD) to Piarco Intl. Airport (POS) cost?
Grab a cheap one-way flight from $173 or cheap return flight from $352 from Washington Dulles Intl. Airport (IAD) to Piarco Intl. Airport (POS) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Washington Dulles Intl. Airport (IAD) to Piarco Intl. Airport (POS)?
May is the cheapest month to fly from IAD to POS. Avoiding peak travel times is often the key to finding a great deal.
What is the cheapest airline that flies from Washington Dulles Intl. Airport (IAD) to Piarco Intl. Airport (POS)?
To find the cheapest airline that'll fly you from IAD to POS, use Expedia's filter tool. Tailor your search based on your travel needs, such as preferred carriers and ideal departure window. You can then sort your results by "Price (lowest to highest)" to list the most affordable options first.
How many flights per day from Washington Dulles Intl. Airport (IAD) to Piarco Intl. Airport (POS)?
Direct flights from Washington Dulles Intl. Airport (IAD) to Piarco Intl. Airport (POS) aren't available daily, so you'll have to take a flight with a layover. Explore your options with our filter tool. Enter your travel dates and choose either "1 Stop" or "2+ Stops."
What day of the week has the most flights from IAD to POS?
Generally you'll find the largest variety of flight choices on a Friday. Tuesdays are often the quietest.* However, this can change depending on the time of year, airline and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Washington Dulles Intl. Airport (IAD) to Piarco Intl. Airport (POS)?
To avoid possible delays on the Washington Dulles Intl. Airport (IAD) to Piarco Intl. Airport (POS) route, fly before 3 PM. Departures after this hour have a 22% higher chance of cancellation.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Washington Dulles Intl. Airport (IAD) to Piarco Intl. Airport (POS) last-minute?
Booking your ticket from IAD to POS shortly before your trip is typically more expensive. But if there's some wiggle room with your itinerary, you could snag a cheap last-minute fare.
Is it cheaper to book an IAD to POS flight and hotel package?
Securing an IAD to POS flight and hotel package is typically cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your travels all in one place. Select from our extensive range of stays and then add activities, car rentals and flights to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Washington Dulles Intl. Airport (IAD) to Piarco Intl. Airport (POS)?
If you reserved your IAD to POS flight within the last 24 hours, you may be able to cancel or modify it without any fees. Depending on the airline and the type of ticket you purchased, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal for further details.

Travel information

Travel information

Origin airport
Washington Dulles Intl.
Destination airport
Piarco Intl.
Airlines serving
Air Canada, American Airlines, Copa, United
Roundtrip price
$352
Distance
2195 mi

Book with confidence

Book with confidence

Washington to Port of Spain Flights

The cheapest times to fly from Washington to Port of Spain

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Washington to Port of Spain are during the month of May. You can find some of the cheapest flights from Washington to Port of Spain with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Washington to Port of Spain

Sunday is one of the best days to book for cheap flights from Washington to Port of Spain: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Washington to Port of Spain

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Washington to Port of Spain in 2025. You can also book with separate airlines for your outbound and return journeys, from $173 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Washington to Port of Spain flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Washington to Port of Spain airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Washington to Port of Spain Flights

Explore a world of travel with Expedia

Explore a world of travel with Expedia

*Available to One Key members.