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Saint Lucia

$145+ 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 8/31. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — UVF
Aug 31 — Sep 71
Mon 8/31
Mon 9/7
1 adult, Economy
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Cheap 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 August 1, 2026.

This American Airlines deal was found by Cheapflights users on 7/30. 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.
Fri 10/95:00 am
BOS
-
UVF
1 stop9h 00m
American Airlines
Wed 10/143:01 pm
UVF
-
BOS
1 stop19h 16m
American Airlines
Deal found 7/30$400
This American Airlines deal was found by Cheapflights users on 7/30. 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.
Sat 10/176:50 pm
BOS
-
UVF
2 stops19h 10m
American Airlines
Sat 10/243:01 pm
UVF
-
BOS
2 stops17h 45m
American Airlines
Deal found 7/30$405
This United Airlines deal was found by Cheapflights users on 7/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/296:00 am
BOS
-
UVF
1 stop7h 31m
United Airlines
Sat 9/52:35 pm
UVF
-
BOS
1 stop19h 13m
United Airlines
Deal found 7/30$406
This Delta deal was found by Cheapflights users on 7/28. 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.
Mon 8/178:45 pm
BOS
-
UVF
1 stop17h 29m
Delta
Tue 8/253:34 pm
UVF
-
BOS
1 stop18h 05m
Delta
Deal found 7/28$407
This American Airlines deal was found by Cheapflights users on 7/30. 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.
Thu 8/205:27 am
BOS
-
UVF
1 stop8h 52m
American Airlines
Thu 8/273:19 pm
UVF
-
BOS
1 stop19h 16m
American Airlines
Deal found 7/30$408
This American Airlines deal was found by Cheapflights users on 7/30. 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.
Sat 10/172:13 pm
BOS
-
UVF
1 stop24h 50m
American Airlines
Fri 10/233:01 pm
UVF
-
BOS
1 stop9h 58m
American Airlines
Deal found 7/30$409
This American Airlines deal was found by Cheapflights users on 7/28. 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.
Wed 9/163:40 pm
BOS
-
UVF
2 stops22h 22m
American Airlines
Thu 9/243:02 pm
UVF
-
BOS
2 stops17h 43m
American Airlines
Deal found 7/28$410
This American Airlines deal was found by Cheapflights users on 7/28. 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.
Sun 8/165:32 am
BOS
-
UVF
1 stop8h 57m
American Airlines
Fri 8/213:19 pm
UVF
-
BOS
2 stops18h 20m
American Airlines
Deal found 7/28$412
This American Airlines deal was found by Cheapflights users on 7/29. 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.
Wed 9/25:35 am
BOS
-
UVF
1 stop8h 14m
American Airlines
Mon 9/74:12 pm
UVF
-
BOS
1 stop23h 58m
American Airlines
Deal found 7/29$414
This American Airlines deal was found by Cheapflights users on 7/29. 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.
Mon 8/177:34 pm
BOS
-
UVF
2 stops18h 15m
American Airlines
Sun 8/232:49 pm
UVF
-
BOS
2 stops19h 04m
American Airlines
Deal found 7/29$417
This American Airlines deal was found by Cheapflights users on 7/30. 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.
Wed 10/142:13 pm
BOS
-
UVF
1 stop24h 50m
American Airlines
Sat 10/173:01 pm
UVF
-
BOS
2 stops18h 19m
American Airlines
Deal found 7/30$419
This Expedia deal was found by Cheapflights users on 7/29. 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.
Thu 10/226:00 am
BOS
-
SLU
2 stops13h 00m
Multiple Airlines
Tue 10/2712:35 pm
SLU
-
BOS
2 stops21h 42m
Multiple Airlines
Deal found 7/29$665

Find 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 August 1, 2026.

Round-trip from

$400
(American Airlines)

One-way from

$145
(Expedia)

Popular in

April

Cheapest in

August

Average price

$382

Good round-trip deal

$1,023 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. 20% potential increase in price ($175 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($38 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2026
Search Deals
Price to beat on a round-trip flight from Boston Logan Intl to Saint Lucia.
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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 August 1, 2026.
Use the filters below to find and compare flights from Boston to Saint Lucia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

BostonCastries

BOS - UVF

BOSUVF

Boston Logan Intl

Sat 9/26

6:00 am-1:31 pm

1 stop7h 31m

Castries Hewanorra

Sat 10/3

2:35 pm-10:45 pm

1 stop8h 10m

$400

BostonCastries

BOS - UVF

BOSUVF

Boston Logan Intl

Sat 9/19

6:00 am-1:31 pm

1 stop7h 31m

Castries Hewanorra

Sat 9/26

2:35 pm-9:33 am

2 stops18h 58m

$405

BostonCastries

BOS - UVF

BOSUVF

Boston Logan Intl

Sat 8/29

6:00 am-1:31 pm

1 stop7h 31m

Castries Hewanorra

Sat 9/5

2:35 pm-9:48 am

1 stop19h 13m

$406

BostonCastries

BOS - UVF

BOSUVF

Boston Logan Intl

Sat 11/7

6:00 am-4:25 pm

1 stop9h 25m

Castries Hewanorra

Sat 11/14

5:17 pm-7:43 am

1 stop15h 26m

$520

BostonCastries

BOS - UVF

BOSUVF

Boston Logan Intl

Mon 8/17

7:20 pm-2:14 pm

1 stop18h 54m

Castries Hewanorra

Fri 8/21

3:34 pm-1:25 am

1 stop9h 51m

$521

BostonCastries

BOS - UVF

BOSUVF

Boston Logan Intl

Fri 8/14

5:30 am-2:14 pm

1 stop8h 44m

Castries Hewanorra

Sun 8/16

3:34 pm-1:25 am

1 stop9h 51m

$522

BostonCastries

BOS - UVF

BOSUVF

Boston Logan Intl

Thu 10/15

5:30 am-2:12 pm

1 stop8h 42m

Castries Hewanorra

Tue 10/27

3:32 pm-9:44 am

1 stop18h 12m

$522

BostonCastries

BOS - UVF

BOSUVF

Boston Logan Intl

Fri 11/6

8:05 pm-4:25 pm

2 stops19h 20m

Castries Hewanorra

Sat 11/14

5:17 pm-7:43 am

1 stop15h 26m

$525

BostonCastries

BOS - UVF

BOSUVF

Boston Logan Intl

Sat 9/26

6:00 am-1:31 pm

1 stop7h 31m

Castries Hewanorra

Sat 10/10

2:35 pm-9:33 am

2 stops18h 58m

$525

BostonCastries

BOS - SLU

BOSSLU

Boston Logan Intl

Thu 10/22

6:00 am-7:00 pm

2 stops13h 00m

Castries George F. L. Charle

Tue 10/27

12:35 pm-10:17 am

2 stops21h 42m

$665

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

Showing 1-10 of 34 resultsSorted by cheapest first
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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 $503). Flying from Boston to Saint Lucia in December is currently the most expensive (average of $858). 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.

How far ahead should I book a flight from Boston to Saint Lucia?

To ensure you get the cheapest price possible for a flight from Boston to Saint Lucia, you should look to book at least 2 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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 August 1, 2026.
Get a feel of what it's like to fly with Delta,American Airlines, andJetBlue 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
7.8
Good
8,493 reviews

Food

7.2

Comfort

7.8

Boarding

8.1

Overall

7.8

Entertainment

7.8

Crew

8.5

Reviews

1 / 20
6.0
Good

Cidalia,Aug 2023

BOS - MIA

I like Delta overall but the delays lately without justification are not leaving a good impression. Both flights were delayed for over 2 hours
Delta
7.8
Good
8,493 reviews
Delta
7.8
Good
8,493 reviews

Food

7.2

Comfort

7.8

Boarding

8.1

Overall

7.8

Entertainment

7.8

Crew

8.5

Reviews

1 / 20
6.0
Good

Cidalia,Aug 2023

BOS - MIA

I like Delta overall but the delays lately without justification are not leaving a good impression. Both flights were delayed for over 2 hours
American Airlines
7.1
Good
11,846 reviews
Delta
7.8
Good
8,493 reviews

Food

7.2

Comfort

7.8

Boarding

8.1

Overall

7.8

Entertainment

7.8

Crew

8.5

Reviews

1 / 20
6.0
Good

Cidalia,Aug 2023

BOS - MIA

I like Delta overall but the delays lately without justification are not leaving a good impression. Both flights were delayed for over 2 hours
JetBlue
7.1
Good
3,033 reviews
Delta
7.8
Good
8,493 reviews

Food

7.2

Comfort

7.8

Boarding

8.1

Overall

7.8

Entertainment

7.8

Crew

8.5

Reviews

1 / 20
6.0
Good

Cidalia,Aug 2023

BOS - MIA

I like Delta overall but the delays lately without justification are not leaving a good impression. Both flights were delayed for over 2 hours

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.

  • How long is the flight from Boston to Saint Lucia?

    Departing from Boston to Saint Lucia will take you 7h 31m. The distance from Boston to Saint Lucia is about 2066 mi. This flight may include one or multiple stops.

  • 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 $1,043, our data indicates the cheapest price to be $898. The most popular route (Boston Logan Intl - Castries Hewanorra), is priced around $400.

  • 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 $503). Flying from Boston to Saint Lucia in December is currently the most expensive (average of $858). 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.

Top 3 airlines flying from Boston to Saint Lucia

Discover the top 3 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 August 1, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$134Average$537FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$292Average$598FlexibilityNo cancel feeOn-time71%
JetBlueCheapest$382Average$672FlexibilityNo cancel feeOn-time62%

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