$231 Cheap Flights from Port of Spain (POS) to Washington (IAD)

View $231 flight on Wed, Oct 29, 2025Opens in a new window

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

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

Prices were available within the past 7 days and start at $231 for one-way flights and $382 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Copa
Fri, May 1 - Fri, May 8
POS
Trinidad
IAD
Washington
$382 Roundtrip, found 3 hours ago
$382
Roundtrip
found 3 hours ago
Select Copa flight, departing Fri, May 1 from Trinidad to Washington, returning Fri, May 8, priced at $382 found 3 hours ago
Copa
Mon, Dec 22 - Fri, Jan 9
POS
Trinidad
IAD
Washington
$398 Roundtrip, found 3 hours ago
$398
Roundtrip
found 3 hours ago
Select Copa flight, departing Mon, Dec 22 from Trinidad to Washington, returning Fri, Jan 9, priced at $398 found 3 hours ago
Copa
Thu, Oct 30 - Fri, Oct 31
POS
Trinidad
IAD
Washington
$399 Roundtrip, found 22 hours ago
$399
Roundtrip
found 22 hours ago
Select Copa flight, departing Thu, Oct 30 from Trinidad to Washington, returning Fri, Oct 31, priced at $399 found 22 hours ago
Copa
Thu, Oct 30 - Mon, Nov 3
POS
Trinidad
IAD
Washington
$400 Roundtrip, found 1 day ago
$400
Roundtrip
found 1 day ago
Select Copa flight, departing Thu, Oct 30 from Trinidad to Washington, returning Mon, Nov 3, priced at $400 found 1 day ago
United
Wed, Oct 29 - Wed, Nov 12
POS
Trinidad
IAD
Washington
$410 Roundtrip, found 3 days ago
$410
Roundtrip
found 3 days ago
Select United flight, departing Wed, Oct 29 from Trinidad to Washington, returning Wed, Nov 12, priced at $410 found 3 days ago
Copa
Mon, Dec 22 - Fri, Jan 9
POS
Trinidad
IAD
Washington
$413 Roundtrip, found 3 hours ago
$413
Roundtrip
found 3 hours ago
Select Copa flight, departing Mon, Dec 22 from Trinidad to Washington, returning Fri, Jan 9, priced at $413 found 3 hours ago
American Airlines
Thu, Nov 6 - Wed, Dec 3
POS
Trinidad
IAD
Washington
$414 Roundtrip, found 3 days ago
$414
Roundtrip
found 3 days ago
Select American Airlines flight, departing Thu, Nov 6 from Trinidad to Washington, returning Wed, Dec 3, priced at $414 found 3 days ago
Copa
Wed, Oct 29 - Mon, Nov 3
POS
Trinidad
IAD
Washington
$416 Roundtrip, found 3 days ago
$416
Roundtrip
found 3 days ago
Select Copa flight, departing Wed, Oct 29 from Trinidad to Washington, returning Mon, Nov 3, priced at $416 found 3 days ago
United
Thu, Nov 6 - Sun, Nov 9
POS
Trinidad
IAD
Washington
$418 Roundtrip, found 2 days ago
$418
Roundtrip
found 2 days ago
Select United flight, departing Thu, Nov 6 from Trinidad to Washington, returning Sun, Nov 9, priced at $418 found 2 days ago
Air Canada
Sat, Feb 7 - Thu, Feb 19
POS
Trinidad
IAD
Washington
$471 Roundtrip, found 3 days ago
$471
Roundtrip
found 3 days ago
Select Air Canada flight, departing Sat, Feb 7 from Trinidad to Washington, returning Thu, Feb 19, priced at $471 found 3 days ago

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

February is typically the cheapest month to fly

From $315 - $2,559 per traveler.

Frequently asked questions

How much does a flight from Piarco Intl. Airport (POS) to Washington Dulles Intl. Airport (IAD) cost?
Secure a cheap one-way flight from $231 or cheap return flight from $382 from Piarco Intl. Airport (POS) to Washington Dulles Intl. Airport (IAD) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Piarco Intl. Airport (POS) to Washington Dulles Intl. Airport (IAD)?
May is the cheapest month to fly from POS to IAD. Traveling outside of peak seasons is often the key to finding better fares.
What is the cheapest airline that flies from Piarco Intl. Airport (POS) to Washington Dulles Intl. Airport (IAD)?
Use the filters on Expedia to compare different airlines and find the most affordable carrier that'll take you from POS to IAD. Then, sort your results by "Price (lowest to highest)" to snap up the best deal available.
How many flights per day from Piarco Intl. Airport (POS) to Washington Dulles Intl. Airport (IAD)?
Nonstop flights from Piarco Intl. Airport (POS) to Washington Dulles Intl. Airport (IAD) aren't available daily, so you'll have to take a flight with a layover. Explore your options with Expedia's filter tool. Enter your travel dates and click on either "1 Stop" or "2+ Stops."
What day of the week has the most flights from POS to IAD?
Generally you'll find the most flight options available on a Friday. Tuesdays tend to be the quietest.* But this can vary based on the airline, season 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 Piarco Intl. Airport (POS) to Washington Dulles Intl. Airport (IAD)?
Select a flight from Piarco Intl. Airport (POS) to Washington Dulles Intl. Airport (IAD) that leaves before 3 PM to reduce the likelihood of delays and cancellations. Departures later than this have a 22% higher chance of being canceled, on average.**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 Piarco Intl. Airport (POS) to Washington Dulles Intl. Airport (IAD) last-minute?
Holding off until just before your departure to book your flight from POS to IAD often results in higher prices. While you may find some last-minute discounts, they aren't always guaranteed. Be flexible with your itinerary to maximize your chances of scoring a bargain.
Is it cheaper to book a POS to IAD flight and hotel package?
You'll generally save money by securing a POS to IAD flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's easy to manage everything in one place. After choosing your ideal accommodations and flights, consider adding extras including activities, tours and car rentals.
Can I cancel or change the date of my flight from Piarco Intl. Airport (POS) to Washington Dulles Intl. Airport (IAD)?
If you reserved your POS to IAD flight within the last 24 hours, you may be able to modify or cancel it without fees. Depending on the airline and the type of fare you have, additional charges may apply for changes after that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you want more information.

Travel information

Travel information

Origin airport
Piarco Intl.
Destination airport
Washington Dulles Intl.
Airlines serving
Air Canada, American Airlines, Copa, United
Roundtrip price
$382
Distance
2195 mi

Book with confidence

Book with confidence

Port of Spain to Washington Flights

The cheapest times to fly from Port of Spain to Washington

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 Port of Spain to Washington are during the month of May. You can find some of the cheapest flights from Port of Spain to Washington with Expedia's search tool and vast selection of airlines.

 

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

Sunday is one of the best days to book for cheap flights from Port of Spain to Washington: 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 Port of Spain to Washington

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 Port of Spain to Washington in 2025. You can also book with separate airlines for your outbound and return journeys, from $231 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 Port of Spain to Washington 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 Port of Spain to Washington 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.

 

Port of Spain to Washington Flights

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*Available to One Key members.