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Saint Lucia

$146+ Cheap flights from Dulles Intl (IAD) to Saint Lucia

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/30. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — UVF
ago. 26 — sep. 21
mar. 8/26
mar. 9/2
1 adult, Economy
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Cheap flight deals from Dulles Intl to Saint Lucia

Keep the following information in mind while searching for Dulles Intl to Saint Lucia flight deals. Data was last updated agosto 21, 2025.

Round-trip from

$367
(Trip.com)

One-way from

$146
(Air Canada)

Popular in

July

Cheapest in

January

Average price

$723
From Washington, D.C. Dulles Intl to Saint Lucia
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One-way flight from Washington, D.C. Dulles Intl to Saint Lucia
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Highest demand for flights based on searches. 6% potential increase in price ($56 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($22 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find flight deals from Dulles Intl to Saint Lucia

Cheapest flights from Dulles Intl to Saint Lucia
Explore the most affordable flight options available from Dulles Intl to Saint Lucia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on agosto 21, 2025.

This Air Canada deal was found by Cheapflights users on 8/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/24:30 pmIAD - UVF
1 stop22h 55mAir Canada
mié. 12/105:15 pmUVF - IAD
1 stop23h 39mAir Canada
Deal found 8/21$418
This Mytrip deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/258:16 amIAD - UVF
2 stops29h 59mAir Canada
mar. 9/303:10 pmUVF - IAD
1 stop22h 28mAir Canada
Deal found 8/20$426
This FlightHub deal was found by Cheapflights users on 8/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 9/31:00 pmIAD - UVF
2 stops49h 15mAir Canada
mar. 9/93:10 pmUVF - IAD
2 stops20h 03mAir Canada
Deal found 8/21$443
This Delta deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 9/106:00 amIAD - UVF
1 stop8h 15mDelta
mié. 9/173:38 pmUVF - IAD
1 stop17h 31mDelta
Deal found 8/20$505
This Air Canada deal was found by Cheapflights users on 8/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/233:36 pmIAD - UVF
1 stop22h 39mAir Canada
lun. 10/274:15 pmUVF - IAD
2 stops28h 44mAir Canada
Deal found 8/21$514
This American Airlines deal was found by Cheapflights users on 8/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/95:00 amIAD - UVF
1 stop8h 20mAmerican Airlines
mar. 12/165:05 pmUVF - IAD
1 stop7h 50mAmerican Airlines
Deal found 8/21$567
This Mytrip deal was found by Cheapflights users on 8/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 11/123:00 amIAD - SLU
3 stops31h 30mMultiple Airlines
dom. 11/165:00 amSLU - IAD
3 stops19h 00mMultiple Airlines
Deal found 8/21$1,464
This Booking.com deal was found by Cheapflights users on 8/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 10/173:36 pmIAD - SLU
2 stops43h 49mMultiple Airlines
lun. 10/204:35 pmSLU - IAD
2 stops21h 03mMultiple Airlines
Deal found 8/21$1,562
This Booking.com deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 9/202:25 pmIAD - SLU
2 stops21h 20mMultiple Airlines
sáb. 9/276:20 pmSLU - IAD
2 stops19h 18mMultiple Airlines
Deal found 8/19$1,724
This Orbitz deal was found by Cheapflights users on 8/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/34:30 pmIAD - SLU
3 stops42h 00mMultiple Airlines
mié. 12/1010:25 amSLU - IAD
2 stops35h 04mMultiple Airlines
Deal found 8/21$2,415
This Travelocity deal was found by Cheapflights users on 8/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 12/264:30 pmIAD - SLU
3 stops42h 15mMultiple Airlines
vie. 1/212:15 pmSLU - IAD
2 stops28h 39mMultiple Airlines
Deal found 8/21$2,422
This Expedia deal was found by Cheapflights users on 8/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/44:30 pmIAD - SLU
2 stops18h 00mMultiple Airlines
vie. 12/1212:15 pmSLU - IAD
2 stops33h 14mMultiple Airlines
Deal found 8/21$2,531

Cheapflights Fare Finder

 
Customize your flight search to find flights from Dulles Intl to Saint Lucia that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated agosto 21, 2025.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Saint Lucia that are best for you.

Fly from

Dulles Intl

Fly to

Saint Lucia

Route

Depart

Return

Price

Washington, D.C.Castries

IAD - UVF

IADUVF

Washington, D.C. Dulles Intl

mar. 12/2

4:30 pm-4:25 pm

1 stop22h 55m

Castries Hewanorra

mié. 12/10

5:15 pm-3:54 pm

1 stop23h 39m

$418

Washington, D.C.Castries

IAD - UVF

IADUVF

Washington, D.C. Dulles Intl

dom. 11/9

4:30 pm-4:25 pm

1 stop22h 55m

Castries Hewanorra

vie. 11/14

5:15 pm-3:54 pm

1 stop23h 39m

$418

Washington, D.C.Castries

IAD - UVF

IADUVF

Washington, D.C. Dulles Intl

mar. 12/2

4:30 pm-4:25 pm

1 stop22h 55m

Castries Hewanorra

vie. 12/5

5:15 pm-3:54 pm

1 stop23h 39m

$418

Washington, D.C.Castries

IAD - UVF

IADUVF

Washington, D.C. Dulles Intl

jue. 9/25

8:16 am-2:15 pm

2 stops29h 59m

Castries Hewanorra

mar. 9/30

3:10 pm-11:13 am

2 stops20h 03m

$426

Washington, D.C.Castries

IAD - SLU

IADSLU

Washington, D.C. Dulles Intl

mié. 11/12

3:00 am-11:30 am

3 stops31h 30m

Castries George F. L. Charle

dom. 11/16

5:00 am-11:00 pm

3 stops19h 00m

$1,464

Washington, D.C.Castries

IAD - SLU

IADSLU

Washington, D.C. Dulles Intl

vie. 10/17

3:36 pm-11:25 am

2 stops43h 49m

Castries George F. L. Charle

lun. 10/20

4:35 pm-1:38 pm

2 stops21h 03m

$1,562

Washington, D.C.Castries

IAD - SLU

IADSLU

Washington, D.C. Dulles Intl

sáb. 9/20

2:25 pm-11:45 am

2 stops21h 20m

Castries George F. L. Charle

sáb. 9/27

6:20 pm-1:38 pm

2 stops19h 18m

$1,724

Washington, D.C.Castries

IAD - SLU

IADSLU

Washington, D.C. Dulles Intl

mié. 12/3

4:30 pm-1:10 pm

2 stops19h 40m

Castries George F. L. Charle

mié. 12/10

10:25 am-8:29 pm

2 stops35h 04m

$2,415

Washington, D.C.Castries

IAD - SLU

IADSLU

Washington, D.C. Dulles Intl

vie. 12/26

9:00 am-10:10 pm

2 stops36h 10m

Castries George F. L. Charle

vie. 1/2

12:15 pm-8:29 pm

2 stops33h 14m

$2,422

Washington, D.C.Castries

IAD - UVF

IADUVF

Washington, D.C. Dulles Intl

jue. 10/30

12:42 pm-3:25 pm

2 stops26h 43m

$146

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/21

Showing 1-10 of 18 results
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Best time to book a flight from Dulles Intl to Saint Lucia

Have a flexible travel schedule? Discover the best time to fly to Saint Lucia from Dulles Intl with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Washington, D.C. Dulles Intl Airport to Saint Lucia

What is the cheapest month to book a flight from Washington, D.C. Dulles Intl Airport to Saint Lucia?

Currently, January is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Saint Lucia (average of $556). Flying from Washington, D.C. Dulles Intl Airport to Saint Lucia in December is currently the most expensive (average of $730). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from IAD to LC?

Find hourly flight availability from Dulles Intl to Saint Lucia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated agosto 21, 2025.

When flying from Washington, D.C. Dulles Intl Airport to Saint Lucia, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Reviews of airlines servicing Saint Lucia

Get insights into the airlines that provide service to Saint Lucia. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Saint Lucia. Reviews last updated agosto 21, 2025.
Read reviews from past customers who have flown Delta and American Airlines from Washington, D.C. Dulles Intl Airport to Saint Lucia. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,981 reviews

Food

7.3

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,981 reviews
Delta
8.0
Very good
7,981 reviews

Food

7.3

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,981 reviews

Food

7.3

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl to Saint Lucia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Washington, D.C. Dulles Intl Airport to Saint Lucia?

    Airlines like Air Canada fly from Washington, D.C. Dulles Intl Airport to Saint Lucia in about 22h 55m. The time it takes to get you to your destination can typically vary by up to . Airlines will cover a distance of 2011 mi.

  • Can I find deals for flights from Dulles Intl to Saint Lucia that include hotel bookings?

    Yes. In addition to deals on Dulles Intl to Saint Lucia flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Dulles Intl to Saint Lucia?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Dulles Intl to Saint Lucia.

  • Can I find deals for business class flights from Dulles Intl to Saint Lucia?

    Yes. Cheapflights offers flight deals from Dulles Intl to Saint Lucia by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Washington, D.C. Dulles Intl Airport to Saint Lucia?

    Currently, January is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Saint Lucia (average of $556). Flying from Washington, D.C. Dulles Intl Airport to Saint Lucia in December is currently the most expensive (average of $730). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for Dulles Intl to Saint Lucia

See prices for flight routes from nearby airports that may be better suited for you.
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Top 2 airlines flying from Dulles Intl to Saint Lucia

Discover the top 2 airlines that operate flights from Dulles Intl to Saint Lucia. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated agosto 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$555Average$834FlexibilityNo cancel feeOn-time71%
DeltaCheapest$555Average$785FlexibilityNo cancel feeOn-timeN/A

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