$135 Find Cheap Flights from Boston to Saint Lucia - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Boston to Saint Lucia departing on 7/24. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Flight Deals

Book Cheap Boston to Saint Lucia Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Boston to Saint Lucia that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Boston to Saint Lucia

Thu, Aug 27 - Mon, Aug 31
Delta Logo
5:30 am - 2:14 pm
BOS
-
UVF
8h 44m
1 stop
Delta Logo
3:34 pm - 1:25 am
UVF
-
BOS
9h 51m
1 stop
$370Delta
Sat, Aug 29 - Sat, Sep 5
Delta Logo
5:30 am - 2:14 pm
BOS
-
UVF
8h 44m
1 stop
Delta Logo
3:34 pm - 12:38 am
UVF
-
BOS
9h 04m
1 stop
$464Delta
Tue, Nov 10 - Thu, Nov 12
Delta Logo
8:15 pm - 3:10 pm
BOS
-
UVF
17h 55m
1 stop
Delta Logo
4:25 pm - 12:58 am
UVF
-
BOS
9h 33m
1 stop
$499Delta
Wed, Oct 14 - Wed, Oct 21
Delta Logo
5:45 am - 2:26 pm
BOS
-
UVF
8h 41m
1 stop
Delta Logo
3:41 pm - 12:58 am
UVF
-
BOS
9h 17m
1 stop
$529Delta
Sat, Oct 24 - Mon, Oct 26
Air Canada Logo
5:00 pm - 3:40 pm
BOS
-
UVF
22h 40m
1 stop
Air Canada Logo
4:40 pm - 2:18 pm
UVF
-
BOS
21h 38m
1 stop
$538Air Canada
Fri, Oct 23 - Fri, Oct 30
Air Canada Logo
6:50 pm - 3:40 pm
BOS
-
UVF
44h 50m
2 stops
Air Canada Logo
4:40 pm - 10:17 am
UVF
-
BOS
17h 37m
1 stop
$541Air Canada
Fri, Oct 23 - Fri, Oct 30
Air Canada Logo
6:50 pm - 3:40 pm
BOS
-
UVF
44h 50m
2 stops
Air Canada Logo
4:40 pm - 9:58 am
UVF
-
BOS
17h 18m
2 stops
$544Air Canada
Fri, Nov 6 - Sat, Nov 14
United Airlines Logo
8:05 pm - 4:25 pm
BOS
-
UVF
19h 20m
2 stops
United Airlines Logo
5:17 pm - 9:25 am
UVF
-
BOS
17h 08m
1 stop
$549United Airlines
Thu, Nov 26 - Mon, Nov 30
Multiple Airlines Logo
5:30 am - 7:00 pm
BOS
-
SLU
12h 30m
2 stops
Multiple Airlines Logo
12:35 pm - 9:58 am
SLU
-
BOS
22h 23m
2 stops
$820Multiple Airlines
Fri, Oct 23 - Fri, Oct 30
Multiple Airlines Logo
6:00 am - 7:00 pm
BOS
-
SLU
13h 00m
2 stops
Multiple Airlines Logo
12:35 pm - 10:17 am
SLU
-
BOS
21h 42m
2 stops
$853Multiple Airlines
Booking Insights

KAYAK's insights & trends for Boston to Saint Lucia flights

Get data-powered insights and trends into flights from Boston to Saint Lucia to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest Boston to Saint Lucia flight route?

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest ticket to Saint Lucia from Boston found in the last 5 days was to Castries, at $2,195 round-trip. The most popular route is from Boston (BOS) to Castries (UVF), and the cheapest round-trip airline ticket found on this route in the last 5 days was $2,195.

Can I save money by flying with a layover from Boston to Saint Lucia?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 1 stop layover the cheapest option at $690 on average.

What is the cheapest month to fly from Boston to Saint Lucia?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Boston to Saint Lucia, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Boston to Saint Lucia is January, when tickets cost $131 (return) on average. On the other hand, the most expensive months are September and April, when the average cost of round-trip tickets is $537 and $501 respectively.

Good to know

Low seasonSeptember
Cheapest flight$135
Best time to beat the crowds but there is an average 9% increase in price.
Most popular time to fly with an average 7% increase in price.
Flight from Boston to Castries

FAQs - booking Saint Lucia flights

  • I’m headed to the northern part of Saint Lucia. What airport should I fly to?

    If you’re flying from Boston to the island of Saint Lucia to visit the northern region, then consider looking for flights to George FL Charles Airport (SLU), just outside the capital city of Castries. Air Canada and Caribbean Airlines join together to offer a two-stop layover that goes to Toronto Pearson International Airport (YYZ) and Port of Spain Piarco International Airport (POS).

  • What airport should I fly to when visiting the southern part of Saint Lucia?

    Passengers looking to explore the southern region of Saint Lucia should consider booking a flight from Boston Logan International Airport to Hewanorra International Airport (UVF) located near the town of Vieux Fort. JetBlue offers nonstop flight service, while United Airlines provides a one-stop layover that goes to O'Hare International Airport (ORD), and Air Canada’s one-stop layover goes to Toronto Pearson International Airport.

  • How eco-friendly is it to fly from Boston to Saint Lucia?

    The eco-friendliness of flights from Boston to Saint Lucia varies depending on the airline and flight route. However, American Airlines, United Airlines, and JetBlue are all committed to sustainable policies. These include the use of sustainable aviation fuel (SAF) in their aircraft fleets, alongside a commitment to achieving net-zero carbon emissions by 2040 for JetBlue and 2050 for United and American.

  • How many bags can I bring on my flight from Boston to Saint Lucia?

    Carry-on and checked-bag allowances on flights from Boston to Saint Lucia vary depending on ticket class and airline. However, JetBlue, United Airlines, and American Airlines all permit economy passengers to bring a bag that fits under the seat and a personal item as carry-on luggage. For checked baggage, they allow the purchase of up to two bags weighing no more than 50 lbs. each.

  • How does KAYAK find such low prices on flights from Boston to Saint Lucia?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Boston to Saint Lucia.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Boston to Saint Lucia?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Boston to Saint Lucia is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Boston to Saint Lucia?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Boston to Saint Lucia with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Boston to Saint Lucia?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Boston to Saint Lucia up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Top tips for finding cheap flights to Saint Lucia

  • Passengers who are U.S. citizens traveling from Boston to the island of Saint Lucia don’t need to apply for a visa beforehand. Instead, with a valid U.S. passport with one blank page, they’re granted visa-free access for up to 90 days.
  • To ease the burden of travel for passengers with reduced mobility, Boston Logan International Airport (BOS) features a wide array of accessible services including parking spaces, restrooms, and elevators. In addition, they have wheelchairs available upon request and pet relief areas in terminals B, C, and E after security.
  • Need to unwind a bit before your flight to Saint Lucia departs? If so, Boston Logan International Airport features lounges such as the American Airlines Admirals Club near Gate B4, the United Club near Gate B24, as well as The Club and The Lounge near Gate C19.
  • Delta Air Lines considers Boston Logan International Airport a primary hub, and JetBlue considers it a focus city, so both airlines provide regular nonstop and layover flights to Saint Lucia.
  • If you’re looking for cheaper flights and don’t mind long layovers, then look for flights from Boston to Saint Lucia that have two or more stops. American Airlines provides an affordable, two-stop layover that goes to Ronald Reagan Washington National Airport (DCA) and Miami International Airport (MIA).

Reviews of the top 3 airlines serving from Boston to Saint Lucia

 
Need help choosing which airline to fly with from Boston 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 8453 reviews
7.8Entertainment
7.8Comfort
8.1Boarding
8.5Crew
7.2Food
Airline reviews

I thought the service was very nice and pleasant. There were no hiccups and no issues so overall a good experience.

8.0 ExcellentAnonymous, Jun 2026
BOS - RDU
Read more Delta reviews

I thought the service was very nice and pleasant. There were no hiccups and no issues so overall a good experience.

It was a pleasant surprise to have complimentary Wi-Fi on the flight

Flight was delayed, we could have been notified earlier and in a consistent manner. App was not refreshing for another passenger to get the latest flight status. We could have stayed and waited at the hotel instead of waiting at the airport had we known the flight was going to delayed for more than 5 hours. The toilet is too tight, and needs to be cleaned more frequently (every hour). The entertainment screen froze, the touch screen not responding to touch. We were upgraded to comfort, it is more comfortable than regular economy seats.

The baggage belt was not updated on the Delta App and was displayed on the wrong belt board. Was not expecting this to happen.

The plan was delayed and left DC 90 minutes late. However, it showed a 20 minute delay on the delta app, then a 12 min delay. It turned out to be an hour delay. I found out where the plane was with flightaware. Stop keeping customers in the dark about what is going on.

Pilots lied about waiting on “paperwork”. Sat in the plane for over an hour, waiting on some papers to be printed according to the pilot and then all of a sudden he says good news maintenance is finally on their way. Maybe they can fix it before we get our paperwork. Ended up missing my connection in LaGuardia and as a result, had a fly home to Lexington instead of the Louisville airport. Then paid $100 to uber to Louisville since it was midnight by the time I got in. I wish they would just be transparent with passengers sometimes and not try to beat around the bush on why things are delayed.

One of the flight attendants was a little cranky. I appreciated the free wifi and plug to charge my laptop

The flight was smooth, the crew was great but the plane was quite old

The flight was delayed 90 minutes The Gate was wrong The Restroom on Aircraft was not clean There was a half used water bottle in my seat

Cabin was not pressurized properly. Several passengers had respiratory difficulties.

Because I bought my ticket from Underpricer, I could not check in online. I could only check in at the airport and that was deeply frustrating because I had to arrive very early. The flight also departed 45 min late and passengers were given no explanations about why we were delayed. I was worried I would miss my connecting flight. Once on board, however, the flight was fine.

Terrible boarding and first class experience. Nice staff but overall disorganized, dirty plane.

The flight was delayed significantly and we sat on runway after landing for awhile. Best thing was the flight attendant, Jenny, in first class, who was very professional and attentive. She was excellent - the rest of the flight was not.

Early departure meant on time arrival. Only real problem was free internet had issues, although chatting with the internet help desk (you can do this via aainflight.com) got the issue resolved.

The staff and service on American Airlines were truly outstanding. I had requested wheelchair assistance for my mother due to her knee issues, and the team went above and beyond every step of the way—from boarding in Boston to our arrival in Chicago. Their care, professionalism, and attentiveness made the entire experience smooth and stress-free. I’m very grateful for the support they provided.

Found that the plane used for this short flight is smaller and therefore the seats are really squeezed tight.

Tv screens and movie selection v good. Friendly staff. They were really worried about max capacity and room for carryons. That is never fun but i had no problem finding space when I boarded.

Great experience. Good dinner and service. FA's were very nice and attentive.

Jill was the flight attendant in first class she was fabulous!! Best flight attendant I have had in years.!! And I fly every other week. Other can learn from her!!

The business steward was absolutely amazing! Smiles and kindness! Wish all AA flights are like this one!

Flight was delayed many times. The crew was friendly but you eleven had to buy headphones to access the movies in the plane. $8 is not a lot for one person but it is when you travel with all your family.

The food took two hours to be delivered to my seat, when I'm on an overnight flight I want to sleep asap after take off

Flight left 2 hours late with no explanation as to the delay

I like everything. Blythe at DCA is the absolute best!

Whole experience was poor. Delayed 2 hours. Lied about the delays. Was all jet blues fault and tried to blame on air traffic control. Sent out other let trips and wouldn't allow people to switch aircraft.

My bag was not loaded on my flight. it was not communicated to me until i was waiting for my bag at my destination. there was no confirmation of when my bag was arriving and no way to track it.

The gate attendant in Boston had a high raspy voice and spoke much too fast to be understood. Not pleasant.

It was fine for what it was. It’s not luxury travel but it was efficient, for the most part. Having my carry-on transferred into luggage however, was unwelcome.

We had better-than-average leg room and I loved the access to shows and movies. During boarding, we could not hear the agent even though we were close to the boarding door, which was kind of scary when we realized that half of the passengers had already boarded. Also, the entertainment was awesome, but I could not hear the movie as well as I would have liked, because my headphones were crappy. It would have been better if I could connect my own ear buds via Bluetooth or if JetBlue provided headphones.

I was seated next to an autistic child who was out of control and had a child behind me kicking my seat for most of the trip. I will never fly JetBlue again. Ever. I don't care how cheap it is. It's terrible.

Everything you need to know for your flight from Boston to Saint Lucia

Information on your arrival and departure airports