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Cheap flights from Boston to Saint Lucia from $128

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Boston to Saint Lucia departing on 1/23. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Boston to Saint Lucia

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
6:59 pm - 4:00 pm
BOS
-
UVF
20h 01m2 stops
American Airlines Logo
5:00 pm - 10:56 am
UVF
-
BOS
18h 56m2 stops
$321American Airlines
Mon, Feb 16 - Mon, Feb 23
American Airlines Logo
6:17 pm - 1:46 pm
BOS
-
UVF
18h 29m1 stop
American Airlines Logo
5:02 pm - 12:59 am
UVF
-
BOS
8h 57m1 stop
$377American Airlines
Thu, Jan 29 - Mon, Feb 2
American Airlines Logo
7:35 pm - 4:02 pm
BOS
-
UVF
19h 27m2 stops
American Airlines Logo
5:02 pm - 10:01 am
UVF
-
BOS
17h 59m1 stop
$382American Airlines
Thu, Jan 29 - Sat, Feb 7
American Airlines Logo
6:17 pm - 1:46 pm
BOS
-
UVF
18h 29m1 stop
American Airlines Logo
3:10 pm - 3:48 pm
UVF
-
BOS
25h 38m1 stop
$383American Airlines
Sat, Jan 24 - Sat, Jan 31
American Airlines Logo
6:23 pm - 3:03 pm
BOS
-
UVF
19h 40m1 stop
American Airlines Logo
5:00 pm - 12:59 am
UVF
-
BOS
8h 59m1 stop
$385American Airlines
Tue, Feb 10 - Sat, Feb 14
American Airlines Logo
5:30 pm - 4:00 pm
BOS
-
UVF
21h 30m1 stop
American Airlines Logo
3:50 pm - 9:49 am
UVF
-
BOS
18h 59m1 stop
$386American Airlines
Sat, Feb 28 - Thu, Mar 5
American Airlines Logo
7:34 pm - 3:03 pm
BOS
-
UVF
18h 29m2 stops
American Airlines Logo
5:02 pm - 11:21 am
UVF
-
BOS
19h 19m2 stops
$387American Airlines
Tue, Feb 3 - Sun, Feb 8
American Airlines Logo
4:10 pm - 1:46 pm
BOS
-
UVF
20h 36m2 stops
American Airlines Logo
3:10 pm - 3:48 pm
UVF
-
BOS
25h 38m1 stop
$388American Airlines
Sat, Jan 24 - Sat, Jan 31
Multiple Airlines Logo
7:55 pm - 7:00 pm
BOS
-
SLU
22h 05m3 stops
Multiple Airlines Logo
7:30 pm - 11:57 pm
SLU
-
BOS
29h 27m3 stops
$1,133Multiple Airlines
Sun, Jan 4 - Wed, Jan 7
Multiple Airlines Logo
5:30 am - 7:00 pm
BOS
-
SLU
12h 30m2 stops
Multiple Airlines Logo
3:45 pm - 11:57 pm
SLU
-
BOS
33h 12m3 stops
$1,179Multiple Airlines
Sun, Jan 4 - Wed, Jan 7

JetBlue flights from Boston to Saint Lucia

Our best JetBlue deals on Boston to Saint Lucia flight tickets
JetBlue
Mar 21
BOS11:11 amBoston Logan Intl
4h 46m
UVF3:57 pmCastries Hewanorra
Mar 28
UVF5:02 pmCastries Hewanorra
5h 10m
BOS10:12 pmBoston Logan Intl
$383
Find similar
JetBlue
Feb 4
BOS7:08 amBoston Logan Intl
7h 45m
1 stop
UVF3:53 pmCastries Hewanorra
Feb 11
UVF4:40 pmCastries Hewanorra
8h 36m
1 stop
BOS12:16 amBoston Logan Intl
$408
Find similar
JetBlue
Mar 9
BOS6:10 amBoston Logan Intl
8h 47m
1 stop
UVF2:57 pmCastries Hewanorra
Mar 14
UVF5:02 pmCastries Hewanorra
5h 10m
BOS10:12 pmBoston Logan Intl
$410
Find similar

Air Canada flights from Boston to Saint Lucia

Our best Air Canada deals on Boston to Saint Lucia flight tickets
Air Canada
Jan 6
BOS4:35 pmBoston Logan Intl
22h 45m
1 stop
UVF4:20 pmCastries Hewanorra
Jan 12
UVF5:15 pmCastries Hewanorra
30h 22m
1 stop
BOS10:37 pmBoston Logan Intl
$476
Find similar
Air Canada
Jan 6
BOS4:35 pmBoston Logan Intl
22h 45m
1 stop
UVF4:20 pmCastries Hewanorra
Jan 12
UVF5:15 pmCastries Hewanorra
22h 37m
2 stops
BOS2:52 pmBoston Logan Intl
$479
Find similar
Air Canada
Jan 6
BOS3:40 pmBoston Logan Intl
23h 40m
2 stops
UVF4:20 pmCastries Hewanorra
Jan 12
UVF5:15 pmCastries Hewanorra
22h 37m
2 stops
BOS2:52 pmBoston Logan Intl
$483
Find similar

momondo 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, momondo users made 832,500 searches. Data last updated December 23, 2025.
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

BostonCastries

BOS - UVF

BOSUVF

Boston Logan Intl

Mon 2/16

6:59 pm-4:00 pm

2 stops20h 01m

Castries Hewanorra

Mon 2/23

5:00 pm-10:56 am

2 stops18h 56m

$321

BostonCastries

BOS - UVF

BOSUVF

Boston Logan Intl

Thu 1/29

6:17 pm-1:46 pm

1 stop18h 29m

Castries Hewanorra

Mon 2/2

5:02 pm-12:59 am

1 stop8h 57m

$377

BostonCastries

BOS - UVF

BOSUVF

Boston Logan Intl

Thu 1/29

7:35 pm-4:02 pm

2 stops19h 27m

Castries Hewanorra

Sat 2/7

5:02 pm-10:01 am

1 stop17h 59m

$382

BostonCastries

BOS - UVF

BOSUVF

Boston Logan Intl

Sat 1/24

6:17 pm-1:46 pm

1 stop18h 29m

Castries Hewanorra

Sat 1/31

3:10 pm-3:48 pm

1 stop25h 38m

$383

BostonCastries

BOS - UVF

BOSUVF

Boston Logan Intl

Tue 2/10

6:23 pm-3:03 pm

1 stop19h 40m

Castries Hewanorra

Sat 2/14

5:00 pm-12:59 am

1 stop8h 59m

$385

BostonCastries

BOS - UVF

BOSUVF

Boston Logan Intl

Sat 2/28

5:30 pm-4:00 pm

1 stop21h 30m

Castries Hewanorra

Thu 3/5

3:50 pm-9:49 am

1 stop18h 59m

$386

BostonCastries

BOS - UVF

BOSUVF

Boston Logan Intl

Tue 2/3

7:34 pm-3:03 pm

2 stops18h 29m

Castries Hewanorra

Sun 2/8

5:02 pm-11:21 am

2 stops19h 19m

$387

BostonCastries

BOS - UVF

BOSUVF

Boston Logan Intl

Sat 1/24

4:10 pm-1:46 pm

2 stops20h 36m

Castries Hewanorra

Sat 1/31

3:10 pm-3:48 pm

1 stop25h 38m

$388

BostonCastries

BOS - SLU

BOSSLU

Boston Logan Intl

Sun 1/4

7:55 pm-7:00 pm

3 stops22h 05m

Castries George F. L. Charle

Wed 1/7

7:30 pm-11:57 pm

3 stops29h 27m

$1,133

BostonCastries

BOS - SLU

BOSSLU

Boston Logan Intl

Sun 1/4

5:30 am-7:00 pm

2 stops12h 30m

Castries George F. L. Charle

Wed 1/7

3:45 pm-11:57 pm

3 stops33h 12m

$1,179

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Saint Lucia from

How to get the cheapest flight ticket from Boston to Saint Lucia

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to Saint Lucia?

Our data shows that Wednesday is the least expensive day to fly to Saint Lucia. Tickets to fly out on this day can be as low as $530. On the other hand, Saturday is the most expensive day to depart from Boston because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $772.

What is the cheapest time of day to depart on your flight to Saint Lucia?

Our data shows that the cheapest Boston to Saint Lucia flights are usually those with departure times in the afternoon. Our users have found flights to Saint Lucia in the afternoon for as low as $645. Flights in the morning are often more expensive with an average ticket price of $670.

What is the cheapest Boston Logan Intl to Saint Lucia flight route?

Fly from Boston Logan Intl to Castries Hewanorra for the best Boston Logan Intl - Saint Lucia flight prices

What cabin class options are available on Boston Logan Intl to Saint Lucia flights?

There is only 1 cabin class available to choose from on Boston Logan Intl to Saint Lucia flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Boston to Saint Lucia flights?

No. A direct flight is the cheapest option for a flight between Boston to Saint Lucia.

Cheap Boston to Saint Lucia flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Boston to Saint Lucia

Best Price Found

$538

Fastest flight time

4h 40m

Direct flights

Sat and Sun

Airports in Saint Lucia

7 airports
The best one-way flight to Saint Lucia from Boston in the past 72 hours is $538. The best round-trip flight deal from Boston to Saint Lucia found on momondo in the last 72 hours is $855.
The fastest flight from Boston to Saint Lucia takes 4h 40m
Direct flights go from Boston to Saint Lucia on Saturday and Sunday. The only airline offering direct flights is JetBlue.
There are 7 airports in Saint Lucia. From Boston there are direct flights to Castries Hewanorra (UVF).
Search flight deals

  • When did momondo last update prices for flights from Boston Logan Intl Airport to Saint Lucia?

    Prices for flights from Boston Logan Intl Airport to Saint Lucia were last updated today.

  • How many operators does momondo search for flights from Boston Logan Intl Airport to Saint Lucia?

  • How old do you have to be to fly from Boston Logan Intl Airport to Saint Lucia?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Boston Logan Intl Airport to Saint Lucia.

  • What documentation or ID do you need to fly to Saint Lucia?

    The required travel and health documents for your Saint Lucia trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Saint Lucia. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular plane model from Boston to Saint Lucia?

Best airlines flying from Boston to Saint Lucia

Compare and see reviews for airlines that fly from Boston to Saint Lucia with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $357Free CancellationRating
7.9
8,014 reviews
Search Delta flights
JetBluePriceFrom $372Free CancellationRating
7.2
2,898 reviews
Search JetBlue flights
United AirlinesPriceFrom $385Free CancellationRating
7.4
9,106 reviews
Search United Airlines flights
American AirlinesPriceFrom $389Free CancellationRating
7.2
11,050 reviews
Search American Airlines flights
Air CanadaPriceFrom $457Free CancellationRating
7.1
10,551 reviews
Search Air Canada flights

Why use momondo?

Why should I use momondo to find a flight deal from Boston to Saint Lucia?

Finding the right flight to Saint Lucia from Boston is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Saint Lucia quick and easy, saving you time and money.

Can I find flights from Boston to Saint Lucia with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Saint Lucia from Boston with this policy.

How can momondo help me find flights from Boston to Saint Lucia?

Once you have performed a search for Boston to Saint Lucia flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Boston to Saint Lucia right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Boston to Saint Lucia flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

An easier way to manage your Saint Lucia trip

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