IAD - POS

$253 Find Cheap Flights from Washington Dulles Airport to Port of Spain - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Dulles Intl to Port of Spain departing on 9/5. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$512
Typical prices: $435-$658
Air Canada
Fri 9/18Mon 9/21
IAD - POS • 1 stop
Cheapest one-way
$197
Multiple Airlines
Sat 9/5
IAD - POS • 1 stop
Top airlines
Cheapest • from $512 (round-trip)
Best reviews • 7.6 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Dulles Intl and Port of Spain. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $453 (round-trip)
Shortest trip • 7h 51m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 49% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Port of Spain!
Flight Deals
Booking Insights
Flight Deals

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

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Dulles Intl to Port of Spain that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Dulles Intl to Port of Spain

Fri, Sep 18 - Mon, Sep 21
Air Canada Logo
9:55 am - 12:15 am
IAD
-
POS
14h 20m
1 stop
Air Canada Logo
1:20 am - 3:25 pm
POS
-
IAD
14h 05m
1 stop
$512Air Canada
Mon, Sep 14 - Sun, Sep 27
Air Canada Logo
4:00 pm - 12:15 am
IAD
-
POS
8h 15m
1 stop
Air Canada Logo
1:20 am - 8:25 pm
POS
-
IAD
19h 05m
1 stop
$512Air Canada
Fri, Sep 25 - Sun, Sep 27
Air Canada Logo
9:55 am - 12:15 am
IAD
-
POS
14h 20m
1 stop
Air Canada Logo
1:20 am - 8:25 pm
POS
-
IAD
19h 05m
1 stop
$512Air Canada
Fri, Oct 23 - Tue, Oct 27
Air Canada Logo
9:55 am - 12:15 am
IAD
-
POS
14h 20m
1 stop
Air Canada Logo
1:15 am - 3:45 pm
POS
-
IAD
14h 30m
1 stop
$512Air Canada
Thu, Oct 29 - Wed, Nov 4
Copa Airlines Logo
2:25 am - 1:17 pm
IAD
-
POS
10h 52m
1 stop
Copa Airlines Logo
2:19 pm - 11:33 pm
POS
-
IAD
10h 14m
1 stop
$568Copa Airlines
Tue, Oct 20 - Wed, Nov 4
Copa Airlines Logo
4:34 pm - 1:17 pm
IAD
-
POS
20h 43m
1 stop
Copa Airlines Logo
2:19 pm - 1:58 pm
POS
-
IAD
24h 39m
1 stop
$568Copa Airlines
Tue, Sep 22 - Mon, Sep 28
Copa Airlines Logo
9:35 am - 1:17 pm
IAD
-
POS
27h 42m
1 stop
Copa Airlines Logo
2:23 pm - 4:20 am
POS
-
IAD
13h 57m
1 stop
$568Copa Airlines
Wed, Oct 28 - Tue, Nov 3
United Airlines Logo
12:50 pm - 11:18 pm
IAD
-
POS
10h 28m
1 stop
United Airlines Logo
1:25 am - 3:59 pm
POS
-
IAD
15h 34m
1 stop
$580United Airlines
Mon, Nov 2 - Mon, Nov 9
United Airlines Logo
8:34 am - 12:18 am
IAD
-
POS
14h 44m
1 stop
United Airlines Logo
1:25 am - 11:28 am
POS
-
IAD
11h 03m
1 stop
$580United Airlines
Wed, Aug 26 - Tue, Sep 1
United Airlines Logo
12:35 pm - 12:50 am
IAD
-
POS
12h 15m
1 stop
United Airlines Logo
12:30 am - 11:28 am
POS
-
IAD
10h 58m
1 stop
$580United Airlines
Booking Insights

KAYAK's insights & trends for Dulles Intl to Port of Spain flights

Get data-powered insights and trends into flights from Dulles Intl to Port of Spain to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from Washington, D.C. Dulles Intl Airport to Port of Spain?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Washington, D.C. Dulles Intl Airport to Port of Spain, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Washington, D.C. Dulles Intl Airport to Port of Spain is March, where tickets cost $302 (return) on average. On the other hand, the most expensive months are December and May, where the average cost of round-trip tickets is $1,209 and $826 respectively.

Good to know

Low season

August

Cheapest flight

$253
Best time to beat the crowds with an average 3% drop in price.
Most popular time to fly with an average 4% increase in price.
Flight from Washington Dulles Airport to Port of Spain

When to book flights from Dulles Intl to Port of Spain

Are your dates flexible? Find out the best times to travel from Dulles Intl to Port of Spain based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Washington Dulles Airport to Port of Spain flights

  • What is the cheapest flight from Washington, D.C. Dulles Intl Airport to Port of Spain?

    In the last 5 days, the lowest price for a flight from Washington, D.C. Dulles Intl Airport to Port of Spain was $253 for a one-way ticket and $512 for a round-trip.

  • Do I need a passport to fly between Washington Dulles Airport and Port of Spain?

    Yes, you’ll need a passport to travel to Port of Spain from Washington Dulles Airport.

  • Which airports will I be using when flying from Washington Dulles Airport to Port of Spain?

    When flying out of Washington Dulles Airport you will be using Washington, D.C. Dulles Intl. You will be landing at Port of Spain, also known as Port of Spain Piarco Intl.

  • Which aircraft models fly most regularly from Washington Dulles Airport to Port of Spain?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Washington Dulles Airport to Port of Spain?

    Star Alliance is the only airline alliance operating flights between Washington Dulles Airport and Port of Spain.

  • Which is the best airline for flights from Washington, D.C. to Port of Spain, Copa Airlines or United Airlines?

    The two airlines most popular with KAYAK users for flights from Washington, D.C. to Port of Spain are Copa Airlines and United Airlines. With an average price for the route of $493 and an overall rating of 7.6, Copa Airlines is the most popular choice. United Airlines is also a great choice for the route, with an average price of $649 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from Washington Dulles Airport to Port of Spain?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Washington Dulles Airport to Port of Spain.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington Dulles Airport to Port of Spain?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Port of Spain from Washington Dulles Airport is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Washington Dulles Airport to Port of Spain?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Port of Spain with an airline and back to Washington Dulles Airport with another airline. Booking your flights between Washington Dulles Airport and POS can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington Dulles Airport to Port of Spain?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Port of Spain from Washington Dulles Airport up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airlines flying from Dulles Intl to Port of Spain

 
See real verified KAYAK customer reviews for airlines flying from Washington, D.C. to Port of Spain. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Dulles Intl to Port of Spain? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.6
Copa AirlinesOverall score based on 1559 reviews
7.8Boarding
8.1Crew
6.9Food
6.8Entertainment
7.4Comfort
Airline reviews

Copa staff at PTY and one particular crew member were unhelpful & rude.

6.0 GoodOluwaseyi, Feb 2026
PTY - POS
Read more Copa Airlines reviews

Copa staff at PTY and one particular crew member were unhelpful & rude.

There should be a warning regarding the quality of the aircraft on the website as we reserve the tickets. There was no TV or any type of screen onboard. The wifi they offer is good for nothing. Traveling 9 hours straight with kids and no type of entetainment was horrible. I wish I had been informed prior so I could buy a ticket with another airline. The food was a joke too. A very tiny portion per passenger. They also charged $100 per checked bag. With United I used to pay $60. So, fair to say that I wont be flying Copa anymore. Their aircraft was super old, outdated, no entertainment, with nearly no onboard food.

Very strict carry on rules meant most of the plane had to gate check their luggage. As is often the case had things that were broken because of this, but I appreciated not being charged to gate check. Otherwise good flight and great crew once on the plane

I liked the meatloaf the chicken was awful but the plane was on time and got there and the staff was nice.

Boarding was quick & efficient; they gave boarding groups due priority; staff & air crew were very cordial and helpful, pleasant flight.

Very happy with my flight. I would definitely recommend it.

Did upgrade, travel in business it was great (more room I could sleep)

Placed us in the last rear row of the plane so could not recline seats because of the rear wall, and also made it more of a tight space when the passenger in front reclined their seat. While understand seat assignments, every passenger should be afforded a reclining seat. The odor control scent from the restrooms was overwhelming strong. My wife and I could not deal with it, and she suffered a terrible headache as a result. I kept getting hit by the crew since I was on the ilse seat. No apologies, nothing. They made me feel like I was supposed to take the beating for a 3 hr flight.

There was no individual at the front check in when I arrived. I waited for at least 15 minutes and walked around asking security/janitors if they could help and they did not have a solution. So I had to take my checked bag through security and they threw away some of my items. I ended up making it to the gate only a few minutes before it closed due to my waiting for an agent at check in.

Boarding groups were called up in Spanish only. Luckily I know some of the language. They gave out grilled cheese sandwiches and a cup of fruit. I was very disappointed. I could only eat the cup of fruit because the only other option was vanilla pudding. The entertainment system and seating were great though.

My flight was delayed so bad i missed u it so i just said never mind

Delayed 2 hours while stuck on the aircraft. If the luggage was properly loaded the first time we probably wouldn’t have been delayed at all

1. Everything was satisfactory concerning the flight. 2. Can't think of what could be better right now.

Onboard staff was courteous, helpful, responsive and friendly. The boarding process was disorganized, poorly communicated, and disheveled. Gate agents were yelling instead of using the PA system, didn’t communicate the timing delay of our flight, and created an atmosphere of chaos rather than order and communication. As far as I know, there was no reason for their. I would hate to see how it operated under extreme conditions. I’ve never seen United Airlines operations in such a state.

The flight did not have its customary snacks during the flight. Apparently they were never loaded on the plane.

Worst service- attendants dont want to help and sat us in front of bathroom

We sat on the hot plane for ours with very conflicting messages. Some (most?) of this may be due to the flight control staff, but we were also repeatedly getting "we are leaving"/"we are not" messages. It was very uncomfortable

Staff could’ve been a little more cordial. The men were much more friendlier than the women. My daughter and I also missed the 2nd to last meal as we were sleeping but that is on us.

Like: departed and arrived on time. Unlike: Food options for purchase allways bad, 1 of 2 of the crew members not very friendly at all. Seats and leg room aweful. At this point I am thinking on switching to AA.

Poor and identical to the first two legs, except for the crew who were patient, professional and of pleasant and jovial disposition!

Everything you need to know for your flight from Dulles Intl to Port of Spain

Information on your arrival and departure airports