$173 Find Cheap Flights from Washington Dulles Airport to Saint Lucia - 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 Saint Lucia departing on 8/30. 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

Sat, Oct 24 - Thu, Oct 29
Air Canada Logo
9:55 am - 3:40 pm
IAD
-
UVF
29h 45m
1 stop
Air Canada Logo
4:40 pm - 3:53 pm
UVF
-
IAD
23h 13m
2 stops
$400Air Canada
Sat, Oct 24 - Thu, Oct 29
Air Canada Logo
10:10 pm - 3:40 pm
IAD
-
UVF
17h 30m
2 stops
Air Canada Logo
4:40 pm - 3:53 pm
UVF
-
IAD
23h 13m
2 stops
$400Air Canada
Sat, Oct 24 - Thu, Oct 29
Air Canada Logo
10:10 pm - 3:40 pm
IAD
-
UVF
17h 30m
2 stops
Air Canada Logo
4:40 pm - 3:53 pm
UVF
-
IAD
23h 13m
2 stops
$400Air Canada
Sat, Oct 24 - Thu, Oct 29
Air Canada Logo
9:55 am - 3:40 pm
IAD
-
UVF
29h 45m
1 stop
Air Canada Logo
4:40 pm - 3:53 pm
UVF
-
IAD
23h 13m
2 stops
$400Air Canada
Sun, Aug 30 - Thu, Sep 3
American Airlines Logo
5:08 am - 2:29 pm
IAD
-
UVF
9h 21m
1 stop
American Airlines Logo
3:19 pm - 10:55 pm
UVF
-
IAD
7h 36m
1 stop
$626American Airlines
Mon, Jan 18 - Fri, Jan 22
American Airlines Logo
6:00 am - 3:03 pm
IAD
-
UVF
8h 03m
1 stop
American Airlines Logo
4:05 pm - 11:12 pm
UVF
-
IAD
8h 07m
1 stop
$626American Airlines
Sun, Aug 30 - Thu, Sep 3
American Airlines Logo
6:33 am - 2:29 pm
IAD
-
UVF
7h 56m
1 stop
American Airlines Logo
3:19 pm - 10:55 pm
UVF
-
IAD
7h 36m
1 stop
$626American Airlines
Tue, Sep 22 - Tue, Sep 29
Delta Logo
6:00 am - 2:12 pm
IAD
-
UVF
8h 12m
1 stop
Delta Logo
3:32 pm - 12:41 am
UVF
-
IAD
9h 09m
1 stop
$688Delta
Wed, Aug 26 - Wed, Sep 2
Delta Logo
6:00 am - 2:14 pm
IAD
-
UVF
8h 14m
1 stop
Delta Logo
3:34 pm - 12:34 am
UVF
-
IAD
9h 00m
1 stop
$688Delta
Wed, Aug 26 - Tue, Sep 1
Delta Logo
6:00 am - 2:14 pm
IAD
-
UVF
8h 14m
1 stop
Delta Logo
3:34 pm - 12:34 am
UVF
-
IAD
9h 00m
1 stop
$688Delta
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 January, when tickets cost $463 (return) on average. On the other hand, the most expensive months are November and June, when the average cost of round-trip tickets is $1,585 and $1,475 respectively.

Good to know

Low season

November

Cheapest flight

$173
Best time to beat the crowds but there is an average 67% increase in price.
Most popular time to fly and prices are also 13% 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.
7.8
DeltaOverall score based on 8493 reviews
7.8Comfort
7.2Food
8.5Crew
7.8Entertainment
8.1Boarding
Airline reviews

The ac must have died, it was way to hot on this flight. Boarding g was chaotic. The flight was delayed for boarding. Not a great experience.

4.0 OkayMichael, Aug 2026
MSP - FAI
Read more Delta reviews

The ac must have died, it was way to hot on this flight. Boarding g was chaotic. The flight was delayed for boarding. Not a great experience.

Flight was delayed for about an hour but overall good experience

The gentleman at the gate I think his name is RIE was exceptional

This flight was no comparison to our prior flight. I'm thinking it all has to do with the age of the aircraft.

2 of the seats in row 31 the entertainment system was not working, and one seat the tray table did not go all the way down. Flight arrived early and departed on time which was great.

Waited at the usual crowded gate at DCA where one ends up standing up because there aren't enough seats.

Delayed take-off. Very small plane so very scary with lots of bumps during the flight. Would never fly Delta on short flights in small 80 seaters plane again! Felt relieved when landed.

Inexpensive, got an exit row aisle aeat with no middle passenger, bought a great breakfast sandwich, flight comfortable & arrived ahead of schedule.

I wouldn't say I liked being forced to check my small roller bag at the gate; too many people had bags and were in a higher boarding group.

715PM departure was 2.5 hours late. Received hotel & food voucher but after we already booked a room. Entire team just seemed like they were 2-3 steps behind in execution, and notifcations.

Disorganized boarding. Mandatory to gate check bags. Curt flight staff. No space for cabin bag, even when I was in first class.

Patrons with larger bags were asked to check the bags when boarding. Seems like the most effective, and least costly way, way to successfully use the cramped space.

They cancelled our flight two times after rebooking us for a later flight. We never got on the plane. We found another solution by driving.

Mostly great. Only issue was with the WiFi. Halfway through the flight it was spotty and I was unable to work as I planned. This impacted my work products as I am traveling for business and it was an unexpected hindrance which was inconvenient. Flight here was amazing. For a 5 hour flight something more than a Biscoff would be nice but I’m just swinging at windmills I guess…

Delayed boarding because a flight attendant couldn't find the gate...sat on the plane for over an hour at the gate because AA couldn't get one of the planes behind us to move

The seats were extremely cramped, with very little legroom or personal space. There was no room left in the overhead bins for a backpack, and the space under the seat in front was so limited that I could barely fit my bag underneath. Overall, the seating arrangement felt very uncomfortable and overcrowded.

As always, most AA flights that we fly are almost ALWAYS delayed and that too multiple times. Very frustrating

The small flights with Valet Luggage has a poor service

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

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

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

Information on your arrival and departure airports