$192 Find Cheap Flights from Washington Dulles Airport to Saint Lucia

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 Saint Lucia departing on 6/10. 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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Book Cheap Dulles Intl to Saint Lucia Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Dulles Intl to Saint Lucia 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 Saint Lucia

Mon, Jun 1 - Fri, Jun 5
Air Canada Logo
4:05 pm - 2:10 pm
IAD
-
UVF
22h 05m
1 stop
Air Canada Logo
3:05 pm - 3:29 pm
UVF
-
IAD
24h 24m
1 stop
$422Air Canada
Mon, Jun 1 - Fri, Jun 5
Air Canada Logo
4:05 pm - 2:10 pm
IAD
-
UVF
22h 05m
1 stop
Air Canada Logo
3:05 pm - 7:44 am
UVF
-
IAD
16h 39m
2 stops
$427Air Canada
Mon, Jun 1 - Fri, Jun 5
Air Canada Logo
5:06 pm - 2:10 pm
IAD
-
UVF
21h 04m
2 stops
Air Canada Logo
3:05 pm - 7:44 am
UVF
-
IAD
16h 39m
2 stops
$432Air Canada
Thu, Jun 18 - Tue, Jun 23
Air Canada Logo
8:18 am - 2:20 pm
IAD
-
UVF
30h 02m
2 stops
Air Canada Logo
3:15 pm - 7:01 pm
UVF
-
IAD
27h 46m
2 stops
$436Air Canada
Wed, May 27 - Tue, Jun 2
Air Canada Logo
5:06 pm - 2:05 pm
IAD
-
UVF
44h 59m
2 stops
Air Canada Logo
3:05 pm - 11:43 am
UVF
-
IAD
20h 38m
2 stops
$457Air Canada
Mon, Jun 1 - Fri, Jun 5
Air Canada Logo
4:05 pm - 2:10 pm
IAD
-
UVF
22h 05m
1 stop
Air Canada Logo
3:05 pm - 3:29 pm
UVF
-
IAD
24h 24m
1 stop
$468Air Canada
Mon, Jun 1 - Fri, Jun 5
Air Canada Logo
5:06 pm - 2:10 pm
IAD
-
UVF
21h 04m
2 stops
Air Canada Logo
3:05 pm - 3:29 pm
UVF
-
IAD
24h 24m
1 stop
$473Air Canada
Mon, Jun 8 - Fri, Jun 19
Air Canada Logo
4:05 pm - 2:10 pm
IAD
-
UVF
22h 05m
1 stop
Air Canada Logo
3:15 pm - 11:43 am
UVF
-
IAD
20h 28m
2 stops
$475Air Canada
Sat, Jun 6 - Mon, Jun 8
Multiple Airlines Logo
4:05 pm - 7:00 pm
IAD
-
SLU
26h 55m
2 stops
Multiple Airlines Logo
12:35 pm - 8:29 pm
SLU
-
IAD
31h 54m
2 stops
$968Multiple Airlines
Sat, Jun 13 - Thu, Jun 18
Multiple Airlines Logo
5:15 pm - 7:00 pm
IAD
-
SLU
25h 45m
2 stops
Multiple Airlines Logo
3:45 pm - 4:12 pm
SLU
-
IAD
48h 27m
2 stops
$984Multiple Airlines
Booking Insights

KAYAK's insights & trends for Dulles Intl to Saint Lucia flights

Get data-powered insights and trends into flights from Dulles Intl to Saint Lucia 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 Saint Lucia?

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 Saint Lucia, 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 Saint Lucia is August, when tickets cost $342 (return) on average. On the other hand, the most expensive months are June and October, when the average cost of round-trip tickets is $1,475 and $966 respectively.

Good to know

Low seasonOctober
Cheapest flight$192
Best time to beat the crowds but there is an average 8% increase in price.
Most popular time to fly and prices are also 10% lower on average.
Flight from Washington Dulles Airport to Castries

FAQs - booking Saint Lucia flights

  • How does KAYAK find such low prices on flights from Washington Dulles Airport to Saint Lucia?

    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 Saint Lucia.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Washington Dulles Airport to Saint Lucia 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 Saint Lucia?

    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 from Washington Dulles Airport to Saint Lucia with an airline and back with another airline.

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

    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 from Washington Dulles Airport to Saint Lucia 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 Saint Lucia

 
Need help choosing which airline to fly with from Dulles Intl to Saint Lucia? 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.
7.9
DeltaOverall score based on 8459 reviews
7.9Comfort
8.1Boarding
7.8Entertainment
7.2Food
8.5Crew
Airline reviews

Much better than Latam, the worse airline company ever. I hope I don't have the need to fly Latam ever in my life again.

10.0 ExcellentIrmara, May 2026
MCO - BOS
Read more Delta reviews

Much better than Latam, the worse airline company ever. I hope I don't have the need to fly Latam ever in my life again.

Seats in Delta Main are unbelievably close to the seat in front of. Hard to get a backpack under the seat.

The flight was operated by Latam. The aircraft had a technical issue and the flight was delayed for the next day. They grounded other passengers to get their airplane assigned to my flight. Most of he ground staff don't speak English (Orlando Airport), but were very polite.The crew on the other hand could speak English and Portuguese. On board service was good.

The agent at check in and at the gate were less than thrilled to be at work. I'm not a fan of Kayak's placement on the plane. I got put in the middle seat and none of my preferences were used.

In ATL they have two sets of departure screens. Follow what is on your airline's departure board - the ATL Airport Authority departure board had completely incorrect details about the gate assignment for my flight, which would have made me miss boarding.

Flight was delayed it was hot while sitting on the plane, one engine was working on the plane until they had to do some jimmy rigging down the runway in order for the other engine to charge up. It was ridiculous

The flight was very good and the staff was very friendly and helpful!

The only thing I would say is we tried to get on a standby earlier flight, but with our fair we couldn’t. That seems senseless to leave with open seats..

Very easy to use and convenient, you can perform any action within the same portal

In a world of delays, Delta was on time both ways! Boarding was fast and efficient. Staff was friendly. AND wifi worked.

Overall a good experience, however Wifi was not working on the flight.

THe flight was an hour late. You got us on the plan and we sat on the ground for 45 minutes with no information from the pilot whatsoever. Worst flight this year.

Going non stop to lax like I paid for. Not stopping in MCI for gas. Too long of delays

Human interaction. Thought there would be more service-even a smile would have been nice.

Incoming flight was delayed, delaying boarding. It then took 30 mins to take off. Took 20 mins to get to a gate because they changed the gate last minute, crew weren’t ready so there was no one staffed to work the jet bridge. Boarding was so disorganized as is usual with American because everyone just stands around the gate regardless of boarding group.

Delays with no explanation. It could have been handled better.

Flight delay for mechanical. Inbound arrived on time. No one said why mechanical delay.

Flight boarded, departed and landed on time. Excellent service from flight attendant in FIRST

This was one of the most frustrating travel experiences I've had to date. I had changed my flight day of to this one as it was slated to depart on time. It ended up being so delayed that my original flight took off before this one did. The boarding process began but eventually stopped and everyone had to get off the plane as a problem was identified. The person at the front desk just tried to laugh it off as if this wasn't already a huge inconvenience. From there, we eventually got to board only to sit at the gate for an additional hour because of some additional issue. This was extremely frustrating and caused a lot of stress.

It was a little concerning to hear the ground crew arguing with the flight crew over baggage space. Instead of taking them and checking them, they started checking for space in the first class cabin moving items around like the flight crew didn't know what they were doing. I was embarrassed for them.

Everything you need to know for your flight from Dulles Intl to Saint Lucia

Information on your arrival and departure airports