HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Saint Lucia

$149+ Cheap flights from Boston (BOS) 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 9/11. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — UVF
ago. 19 — ago. 261
mar. 8/19
mar. 8/26
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Boston to Saint Lucia with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Boston to Saint Lucia

Keep the following information in mind while searching for Boston to Saint Lucia flight deals. Data was last updated agosto 14, 2025.

Round-trip from

$394
(Air Canada)

One-way from

$149
(Air Canada)

Popular in

July

Cheapest in

March

Average price

$835

Good round-trip deal

$652 or less

Good one-way deal

$251 or less
From Boston Logan Intl to Saint Lucia
Search Deals
One-way flight from Boston Logan Intl to Saint Lucia
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($132 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($18 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2025
Search Deals
Price to beat on a round-trip flight from Boston Logan Intl to Saint Lucia.
Search Deals
Price to beat on a one-way flight from Boston Logan Intl to Saint Lucia.
Search Deals

Find flight deals from Boston to Saint Lucia

Cheapest flights from Boston to Saint Lucia
Explore the most affordable flight options available from Boston to Saint Lucia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on agosto 14, 2025.

This Air Canada deal was found by Cheapflights users on 8/14. 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.
lun. 9/226:30 pmBOS - UVF
2 stops19h 45mAir Canada
mar. 9/303:10 pmUVF - BOS
1 stop18h 45mAir Canada
Deal found 8/14$394
This FlightHub deal was found by Cheapflights users on 8/12. 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.
dom. 9/146:30 pmBOS - UVF
2 stops43h 45mAir Canada
vie. 9/193:10 pmUVF - BOS
1 stop18h 45mAir Canada
Deal found 8/12$404
This Trip.com deal was found by Cheapflights users on 8/12. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/58:02 pmBOS - UVF
1 stop17h 29mUnited Airlines
sáb. 9/132:35 pmUVF - BOS
1 stop17h 34mUnited Airlines
Deal found 8/12$419
This Priceline deal was found by Cheapflights users on 8/13. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/236:55 pmBOS - UVF
1 stop19h 20mAir Canada
lun. 10/274:15 pmUVF - BOS
2 stops22h 37mAir Canada
Deal found 8/13$435
This Air Canada deal was found by Cheapflights users on 8/13. 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.
lun. 9/16:40 pmBOS - UVF
2 stops19h 35mAir Canada
vie. 9/53:10 pmUVF - BOS
2 stops23h 20mAir Canada
Deal found 8/13$444
This FlightHub deal was found by Cheapflights users on 8/14. 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.
mar. 12/27:55 pmBOS - UVF
1 stop19h 30mAir Canada
dom. 12/75:15 pmUVF - BOS
2 stops41h 17mAir Canada
Deal found 8/14$470
This Priceline deal was found by Cheapflights users on 8/13. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/226:30 pmBOS - UVF
2 stops43h 45mAir Canada
dom. 10/264:15 pmUVF - BOS
2 stops17h 37mAir Canada
Deal found 8/13$477
This Priceline deal was found by Cheapflights users on 8/13. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 10/276:15 amBOS - UVF
1 stop9h 10mAir Canada
vie. 10/314:15 pmUVF - BOS
1 stop17h 42mAir Canada
Deal found 8/13$487
This Priceline deal was found by Cheapflights users on 8/13. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 8/255:50 amBOS - UVF
2 stops32h 25mAir Canada
vie. 8/293:10 pmUVF - BOS
2 stops42h 20mAir Canada
Deal found 8/13$496
This Air Canada deal was found by Cheapflights users on 8/13. 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.
lun. 11/106:15 amBOS - UVF
1 stop9h 10mAir Canada
vie. 11/145:15 pmUVF - BOS
2 stops22h 37mAir Canada
Deal found 8/13$498
This Priceline deal was found by Cheapflights users on 8/14. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 10/258:35 pmBOS - UVF
1 stop17h 22mJetBlue
sáb. 11/12:42 pmUVF - BOS
Nonstop5h 15mJetBlue
Deal found 8/14$499
This Mytrip deal was found by Cheapflights users on 8/14. 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. 9/112:18 pmBOS - SLU
2 stops21h 12mMultiple Airlines
jue. 9/186:20 pmSLU - BOS
3 stops29h 37mMultiple Airlines
Deal found 8/14$885

Cheapflights Fare Finder

 
Customize your flight search to find flights from Boston 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 14, 2025.
Use the filters below to find and compare flights from Boston to Saint Lucia that are best for you.

Fly from

Boston

Fly to

Saint Lucia

Route

Depart

Return

Price

BostonCastries

BOS - UVF

BOSUVF

Boston Logan Intl

lun. 10/20

4:45 pm-2:15 pm

1 stop21h 30m

Castries Hewanorra

vie. 10/24

3:10 pm-3:59 pm

1 stop24h 49m

$394

BostonCastries

BOS - UVF

BOSUVF

Boston Logan Intl

lun. 10/6

4:45 pm-2:15 pm

1 stop21h 30m

Castries Hewanorra

vie. 10/10

3:10 pm-6:10 pm

1 stop27h 00m

$394

BostonCastries

BOS - UVF

BOSUVF

Boston Logan Intl

lun. 9/22

6:30 pm-2:15 pm

2 stops19h 45m

Castries Hewanorra

vie. 9/26

3:10 pm-6:10 pm

1 stop27h 00m

$394

BostonCastries

BOS - UVF

BOSUVF

Boston Logan Intl

lun. 9/29

6:30 pm-2:15 pm

2 stops19h 45m

Castries Hewanorra

vie. 10/3

3:10 pm-2:30 pm

2 stops23h 20m

$394

BostonCastries

BOS - UVF

BOSUVF

Boston Logan Intl

lun. 9/22

6:30 pm-2:15 pm

2 stops19h 45m

Castries Hewanorra

mar. 9/30

3:10 pm-9:55 am

1 stop18h 45m

$394

BostonCastries

BOS - SLU

BOSSLU

Boston Logan Intl

jue. 9/11

2:18 pm-11:30 am

2 stops21h 12m

Castries George F. L. Charle

jue. 9/18

6:20 pm-11:57 pm

3 stops29h 37m

$885

BostonCastries

BOS - SLU

BOSSLU

Boston Logan Intl

vie. 9/26

4:45 pm-1:10 pm

2 stops20h 25m

Castries George F. L. Charle

dom. 9/28

12:30 pm-11:29 am

2 stops22h 59m

$1,410

BostonCastries

BOS - SLU

BOSSLU

Boston Logan Intl

sáb. 8/30

6:40 pm-7:00 pm

3 stops24h 20m

Castries George F. L. Charle

mar. 9/2

7:30 am-9:30 am

3 stops26h 00m

$1,416

BostonCastries

BOS - SLU

BOSSLU

Boston Logan Intl

jue. 9/18

6:55 pm-11:30 am

2 stops16h 35m

Castries George F. L. Charle

lun. 9/22

4:35 pm-3:59 pm

2 stops23h 24m

$1,590

BostonCastries

BOS - SLU

BOSSLU

Boston Logan Intl

sáb. 10/25

6:00 am-11:25 am

2 stops29h 25m

Castries George F. L. Charle

sáb. 11/1

6:20 pm-1:12 pm

2 stops18h 52m

$2,699

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/12

Showing 1-10 of 17 results
1
2

Best time to book a flight from Boston to Saint Lucia

Have a flexible travel schedule? Discover the best time to fly to Saint Lucia from Boston 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 Boston to Saint Lucia

What is the cheapest month to book a flight from Boston to Saint Lucia?

Currently, January is the cheapest month in which you can book a flight from Boston to Saint Lucia (average of $556). Flying from Boston 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 BOS to LC?

Find hourly flight availability from Boston 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 14, 2025.

When flying from Boston 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 14, 2025.
Get a feel of what it's like to fly with Delta, United Airlines, and American Airlines from Boston to Saint Lucia by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,980 reviews

Crew

8.5

Boarding

8.2

Food

7.3

Comfort

7.9

Entertainment

7.9

Overall

8.0

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
7,980 reviews
Delta
8.0
Very good
7,980 reviews

Crew

8.5

Boarding

8.2

Food

7.3

Comfort

7.9

Entertainment

7.9

Overall

8.0

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!
United Airlines
7.4
Good
8,916 reviews
Delta
8.0
Very good
7,980 reviews

Crew

8.5

Boarding

8.2

Food

7.3

Comfort

7.9

Entertainment

7.9

Overall

8.0

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
7,980 reviews

Crew

8.5

Boarding

8.2

Food

7.3

Comfort

7.9

Entertainment

7.9

Overall

8.0

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!
JetBlue
7.2
Good
2,914 reviews
Delta
8.0
Very good
7,980 reviews

Crew

8.5

Boarding

8.2

Food

7.3

Comfort

7.9

Entertainment

7.9

Overall

8.0

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!
Air Canada
7.1
Good
9,949 reviews
Delta
8.0
Very good
7,980 reviews

Crew

8.5

Boarding

8.2

Food

7.3

Comfort

7.9

Entertainment

7.9

Overall

8.0

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 Boston to Saint Lucia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Boston to Saint Lucia?

    Boston Logan Intl (BOS) is the airport you will fly out of if you book a flight from Boston to Saint Lucia. It is only a 2.6 mi journey to Logan Intl (BOS) from Boston’s city center.

  • What are the cheapest flights from Boston to Saint Lucia?

    Looking for the cheapest flight from Boston to Saint Lucia? While on average our users pay $573, our data indicates the cheapest price to be $248. The most popular route (Boston Logan Intl - Castries Hewanorra), is priced around $451.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Boston 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 Boston to Saint Lucia?

    Currently, January is the cheapest month in which you can book a flight from Boston to Saint Lucia (average of $556). Flying from Boston 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Boston to Saint Lucia

See prices for flight routes from nearby airports that may be better suited for you.
Boston to Luis Munoz Marin Intl flights
Hartford to Luis Munoz Marin Intl flights
Boston to Oranjestad flights
Boston to Punta Cana flights
Boston to Santo Domingo flights
Boston to Santiago de los Caballeros flights
Boston to Montego Bay flights
Boston to Saint Thomas Island flights
Boston to Simpson Bay flights
Boston to Nassau flights
Boston to Castries flights
Boston to Bridgetown flights
Boston to Providenciales flights
Boston to George Town flights
Hartford to Oranjestad flights
Boston to Willemstad flights
Hartford to Montego Bay flights
Hartford to Punta Cana flights
Hartford to Saint Thomas Island flights
Boston to St. George's flights
Boston to Kingston flights
Boston to Aguadilla flights
Boston to Christiansted flights
Boston to Port of Spain flights
Boston to Ponce flights
Albany to Luis Munoz Marin Intl flights
Boston to St. John's flights
Hartford to Kingston flights
Albany to Oranjestad flights
Boston to Road Town flights
Hartford to Willemstad flights
Hartford to Providenciales flights
Boston to Puerto Plata flights
Hartford to George Town flights
Boston to Kralendijk flights
Boston to Georgetown flights
Hartford to Simpson Bay flights
Hartford to Ponce flights
Hartford to Nassau flights
Hartford to Castries flights
Boston to Cap Haitien flights
Albany to Punta Cana flights
Albany to Montego Bay flights
Hartford to Christiansted flights
Boston to Castries flights
Boston to Kingstown flights
Albany to Saint Thomas Island flights
Boston to Basseterre flights
Boston to Freeport flights
Hartford to Santiago de los Caballeros flights

Top 5 airlines flying from Boston to Saint Lucia

Discover the top 5 airlines that operate flights from Boston 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 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$361Average$587FlexibilityNo cancel feeOn-time69%
JetBlueCheapest$363Average$644FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$386Average$653FlexibilityNo cancel feeOn-time71%
DeltaCheapest$387Average$679FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$457Average$531FlexibilityNo cancel feeOn-time67%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.