$212 Find Cheap Flights from Washington Dulles Airport to Saint Lucia - Compare and Save

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Price, demand and travel trends for Washington, D.C. Dulles Intl Airport to Saint Lucia flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights with more confidence.

Are flights from Washington, D.C. Dulles Intl Airport to Saint Lucia cheaper or more expensive than last year?

Fares from Washington, D.C. Dulles Intl Airport to Saint Lucia are running about the same as they were around this time last year, averaging $778 round-trip.

What are the cheapest fares from Washington, D.C. Dulles Intl Airport to Saint Lucia right now?

The cheapest fare from Washington, D.C. Dulles Intl Airport to Saint Lucia in the last week was $518 round-trip, to Castries Hewanorra (UVF).

What’s the cheapest month to fly from Washington, D.C. Dulles Intl Airport to Saint Lucia?

January is the cheapest time of year to fly, with average fares of $468. Prices are highest in May, when average flight costs increase to around $1,199.

Which airport in Saint Lucia is the cheapest to fly to from Washington, D.C. Dulles Intl Airport?

All flights from Washington, D.C. Dulles Intl Airport to Saint Lucia arrive at Castries Hewanorra (UVF). On average, round-trip fares are around $780.

What’s the cheapest day to fly from Washington, D.C. Dulles Intl Airport to Saint Lucia?

Sunday tends to be the cheapest day to fly from Washington, D.C. Dulles Intl Airport to Saint Lucia, while Monday is the most expensive. Fares run about 33% higher that day, based on the past 12 months of KAYAK data.

What's the cheapest time of day to fly from Washington, D.C. Dulles Intl Airport to Saint Lucia?

Data from the past 12 months shows it's cheapest to fly to Saint Lucia during the night with average prices of $398. The morning is the most expensive time to fly, with average prices of $781.

Key details for Washington, D.C. Dulles Intl Airport to Saint Lucia flights

Low season

October

Cheapest flight

$212
Beat the crowds with an average 28% drop in travelers.
The most popular month to fly with an average 50% increase in travelers.
One-way flight from Washington, D.C. Dulles Intl Airport to Castries

Your Washington, D.C. Dulles Intl Airport to Saint Lucia flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines and booking tips.

  • Is now a good time to book a flight from Washington, D.C. Dulles Intl Airport to Saint Lucia?

    Yes. Fares from Washington, D.C. Dulles Intl Airport to Saint Lucia are low right now. As a rule of thumb, a round-trip under $610 (cheaper than most fares this year) is a good deal, so if you spot one at or below that, it's a good time to book.

  • How much should I budget for a flight from Washington, D.C. Dulles Intl Airport to Saint Lucia?

    Over the past 12 months, round-trip fares from Washington, D.C. Dulles Intl Airport to Saint Lucia have ranged from $610 to $933.

  • What are the main airports serving Saint Lucia?

    Flights to Saint Lucia use two main airports, Castries George F. L. Charle (SLU) and Castries Hewanorra (UVF).

  • What airlines fly nonstop from Washington, D.C. Dulles Intl Airport to Saint Lucia?

    Based on the flight schedule for the next 3 months, no airline regularly operates nonstop flights from Washington, D.C. Dulles Intl Airport to Saint Lucia. One-stop options include:

    • Delta
    • American Airlines
    • United Airlines

  • Which cabin classes are available on flights from Washington, D.C. Dulles Intl Airport to Saint Lucia?

    On flights from Washington, D.C. Dulles Intl Airport to Saint Lucia you can only book Economy Class.

Your guide to booking Washington, D.C. Dulles Intl Airport to Saint Lucia flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your travel dates are flexible, book your trip for January when flights are typically cheapest and avoid May when prices are at their highest.
  • Flying on Sunday is usually the cheapest. Flights on Monday cost about 33% more on average, so being flexible with your travel dates could help you save.
  • Start your trip in Castries, which is the most popular destination in Saint Lucia. From there, it's easy to continue on to other popular destinations such as Soufrière, Gros Islet and Vieux Fort.

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 8697 reviews
7.2Food
7.8Entertainment
8.1Boarding
7.8Comfort
8.5Crew
Airline reviews

We experienced delays in small increments that added up to more than an hour. At the gate, staff showed little concern and compared our delay with the inbound flight’s two-hour tarmac wait, which didn’t address our situation. Once onboard, the flight attendants seemed tired and unfriendly. I understand delays are frustrating for everyone, but passengers shouldn’t feel blamed for them. During the flight, a bright light above the emergency exit stayed on. It was concerning, and no one explained it or offered passengers the option to move. After landing, we waited about 30 minutes on the tarmac for a gate, then waited again for an agent to connect the plane to the terminal. From the Reagan gate staff to the cabin crew and RDU personnel, the service felt dismissive throughout. Overall, this was a stressful trip and a very disappointing customer-service experience

4.0 OkayRonald, Oct 2026
Read more Delta reviews

We experienced delays in small increments that added up to more than an hour. At the gate, staff showed little concern and compared our delay with the inbound flight’s two-hour tarmac wait, which didn’t address our situation. Once onboard, the flight attendants seemed tired and unfriendly. I understand delays are frustrating for everyone, but passengers shouldn’t feel blamed for them. During the flight, a bright light above the emergency exit stayed on. It was concerning, and no one explained it or offered passengers the option to move. After landing, we waited about 30 minutes on the tarmac for a gate, then waited again for an agent to connect the plane to the terminal. From the Reagan gate staff to the cabin crew and RDU personnel, the service felt dismissive throughout. Overall, this was a stressful trip and a very disappointing customer-service experience

delayed take-off, then had to circle in air for awhile, wi-fi did not work, then the cabin got extremely hot multiple times and the luggage was at wrong carousel at LGA. In addition, plenty of overhead space so they checked bags too early. Horrible flight.

WiFi only works on about 75% of my Delta flights. I rarely fly SW, but their WiFi works 100% of the time and is easy to connect. On my DL flight from DCA to BNA today, I try to connect to WiFi for about 30 minutes, but I gave up. I have a lot of work to do, and I lost two hours today. Very frustrating.

I don't know why the crew decided to board 15 minutes early without informing anyone not at the gate. Why would you have the app send a notification that we're boarding on time, instead board early, and then rush me to the gate. Then have me check my carry-on when I specifically packed my bag as to not do so.

Long delays at both DCA and MSP; Crew did not keep us informed (or very little). Airplane was showing signs of heavy use (not up to Delta standards). Food options for Business Class have dropped in quality. After landing we sat on tarmac for maybe 25 minutes with no provided chance to use the bathroom and crew did not tell us what was going on or give an estimated time to expect to be at a gate.

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.

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.

Crew tried to accommodate late arrival due to late departure

I injured myself during my trip. The staff of American Airlines were very compassionate and empathic. They took additional steps to make my experience easier. Thank you!!

There was no ground crew at HSV gate when we arrived. The were busy with another arrival. We had to wait 20 mins for them to arrive and direct the plane to the gate. It took almost 45 mins to get my luggage. The luggage belt had 3 flights bags on it and the other 2 luggage belts were not being used. It looked like there was only 1 crew serving .3 arriving flights.

Liked: staff, no delays, Could use some improvement: Food, comfort, cleanliness, lack of chargers on the DCA -> DSM flight

It was close to its perfect the flake could be took off early, landed early, didn’t have to wait for my daughter stroller luggage came out quick, very efficient, very good flight

comfy and spacious seats for premium economy, nice flight attendants. only problem was the wifi did not work, and my entertainment screen was locked in Arabic language and all kids shows with no way of seemingly changing it. but the flight was fine and I arrived with no issues

the flight is delayed, which is not uncommon but the communication was still getting hopes on reaching on time which didn't happen. When I boarded the flight it was so like unimaginably filthy. My seat belt had some sticky stuff to it like food or something from before and the space below the arm rest is accumulated dust and waste like from few months i have the pictures. Cheery on top, the airhostess was an old lady who was so bossy and mad for no reason and bossing around everyone!! worst experience ever!!

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

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

More options for your flight from Dulles Intl to Saint Lucia

Complete your trip to Saint Lucia with a hotel stay or car rental