$123 Find Cheap Flights from Boston to Saint Lucia

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 11/13. 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

KAYAK searches hundreds of travel sites at once for deals on flights to Saint Lucia

Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 22% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Boston to Saint Lucia

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Castries
Castries3 stops$790
Castries
Castries3 stops$790

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, Nov 13 - Mon, Nov 17
American Airlines Logo
7:17 pm - 3:04 pmBOS-UVF
18h 47m2 stops
American Airlines Logo
4:52 pm - 10:35 amUVF-BOS
18h 43m2 stops
$332American Airlines
Find Deal
Wed, Oct 15 - Mon, Oct 20
American Airlines Logo
4:30 pm - 3:00 pmBOS-UVF
22h 30m1 stop
American Airlines Logo
4:00 pm - 12:34 amUVF-BOS
8h 34m1 stop
$335American Airlines
Find Deal
Fri, Oct 31 - Fri, Nov 7
Delta Logo
5:40 am - 2:26 pmBOS-UVF
8h 46m1 stop
Delta Logo
4:41 pm - 1:13 amUVF-BOS
9h 32m1 stop
$347Delta
Find Deal
Fri, Oct 31 - Fri, Nov 7
JetBlue Logo
5:40 am - 1:57 pmBOS-UVF
8h 17m1 stop
JetBlue Logo
4:57 pm - 11:48 pmUVF-BOS
7h 51m1 stop
$407JetBlue
Find Deal
Mon, Sep 29 - Fri, Oct 3
Air Canada Logo
12:15 pm - 2:15 pmBOS-UVF
26h 00m1 stop
Air Canada Logo
3:10 pm - 11:29 amUVF-BOS
20h 19m1 stop
$408Air Canada
Find Deal
Mon, Nov 10 - Mon, Nov 17
Air Canada Logo
6:15 am - 4:25 pmBOS-UVF
9h 10m1 stop
Air Canada Logo
5:15 pm - 12:12 pmUVF-BOS
19h 57m1 stop
$418Air Canada
Find Deal
Thu, Dec 11 - Tue, Dec 16
JetBlue Logo
5:40 am - 2:56 pmBOS-UVF
8h 16m1 stop
JetBlue Logo
4:55 pm - 12:03 amUVF-BOS
8h 08m1 stop
$467JetBlue
Find Deal
Fri, Oct 31 - Fri, Nov 7
Multiple Airlines Logo
8:24 pm - 4:25 pmBOS-UVF
44h 01m3 stops
Multiple Airlines Logo
5:15 pm - 9:27 pmUVF-BOS
29h 12m2 stops
$605Multiple Airlines
Find Deal
Sat, Nov 1 - Sat, Nov 8
Delta Logo
5:40 am - 2:21 pmBOS-UVF
8h 41m1 stop
Delta Logo
4:41 pm - 1:13 amUVF-BOS
9h 32m1 stop
$663Delta
Find Deal
Thu, Oct 30 - Thu, Nov 6
Multiple Airlines Logo
5:30 am - 3:25 pmBOS-UVF
33h 55m2 stops
Multiple Airlines Logo
3:40 pm - 7:31 pmUVF-BOS
28h 51m3 stops
$706Multiple Airlines
Find Deal
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 72 hours was to Castries, at $452 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 72 hours was $452.

Good to know

Low seasonAugust
Cheapest flight$123
Best time to beat the crowds with an average 16% drop in price.
Most popular time to fly and prices are also 3% lower on average.
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.

  • What is the cheapest time of day to fly to Saint Lucia?

    The cheapest time of day to fly to Saint Lucia is generally in the evening, when round-trip flights cost $645 on average. Morning departures are around 4% more expensive than evening flights, on average. The most expensive time of day to fly to Saint Lucia is generally in the morning, which is peak travel time and where the average cost of a ticket is $670.

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 5 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.
7.9
DeltaOverall score based on 7957 reviews
8.2Boarding
7.9Comfort
8.5Crew
7.9Entertainment
7.3Food
Airline reviews

The staff and the boarding procedure were all amazing . The one flight was not equipped with WIFI which now adays seems odd. All in all the experience was good

8.0 ExcellentAnonymous, Sep 2025GFK - MSP
Read more Delta reviews

The staff and the boarding procedure were all amazing . The one flight was not equipped with WIFI which now adays seems odd. All in all the experience was good

Passengers need to check in big baggage instead of bringing on the plane. That cause inconvenience for everyone. Otherwise flight was good.

Perfect flight both ways. On time, courteous staff, plane comfortable and cool. Best domestic flights I’ve had in awhile.

The food was terrible especially for a 15 hour international flight. The crew was unpleasant as well.

Really low quality food especially for an international flight. The crew also was surprisingly unpleasant except couple of ladies. I know we were not in first class but that’s no reason to treat customers as less.

Flight delayed for two and half hours and then canceled altogether due to mechanical issues. No mechanic onsite to fix so had to send one from LAX.

Quick check in. Everything went smooth. I don't know what can be done about airline food.

Crew was good. The reservation got mixed up and they didn't have my TSA number. I am also a Silver Medallion and wasn't able to use Sky Priority.

Delta made it easy, comfortable and timely. The crew was fantastic.

This route with Delta always has delays or is cancelled. Aircrafts seem smaller and older. I fly Delta quite a bit - haven’t had issues with the international flights. But this route has always been the troublesome one

We had to deboard 2 times due to maintenance issues. They changed the plane, and then we got deviated to LAX due to maibtenance issues on the other plane, had to sleep at LAX and los a full day.

Everything was good, except the seats in economy were so close together, you could barely get out when the seat in front of your was reclined. If the airlines keep jamming in more and more seats, it will become intolerable. I will look for another airline that considers customer comfort and does not keep adding more rows of seats for more profit.

The newer screen was super cool and had the option to watch many different shows or movies. Crew was polite and helpful. However again, many children screaming bloody murder and kicking my seat, and parents doing nothing about it as usual.

Flight was good and crew was super polite. However, there were around 5 kids screaming the WHOLE 2 hours. I understand kids have to come but parents need to do something to control their children. They make the experience terrible, especially after finishing 16 hour shifts at the hospital I needed some sleep, which I did not get.

IAD with the archaic people movers is just a place to be avoided.

Great service on board. Boarding a bit slow due to process. Food was pretty average.

Tastless food and too obvious lack of enthusiasm for service in the economy vesus business class

All of the United employees I interacted with were professional and courteous. The aircraft was clean, the food on the flight was good. No complaints here.

I had no checked baggage but was required to hand over carry on baggage at the door of the plane. There was a lot of overboard space in the plane and I was one of the last ones. I ran to get my carry on but it was gone. I was given back at the plane door in Toronto, so the wait was not as long as it would have been at the carousel.

Armrest controller on my seat 35D and nextbooennseat 35E did not work right. Hard to press buttons to recognize and 35D had constantnpressure either upmost down somit was nearly impossible to make selections. .

Given it’s a red-eye into Charolotte, we didn’t get any food. The survey does not include “N/A” so the rating will be skewed.

Great. Quick and quiet and east. The breakfast choices were a welcome surprise!

American airlines suck they delay the flights all the time made me sleep in an airport because my flight was delayed and I miss my connecting flight

There's nothing I liked about it. For first off I scheduled this trip two weeks in advance then they delayed my flight which messed up my whole trip. So I scheduled it for the following weekend thinking there won't be a delay and guess what as soon as I got to the airport we said in the airplane on the tarmac for an hour and a half. Not only was it delayed I missed my connecting flight meaning I had to stay the night at Dallas-Fort Worth airport sleeping on the floor. I will tell you this I will never fly American airlines ever again I have had nothing but horrible experience with them and I just throw money at them

The stewardess hit me with the food kart twice on the head and didn't say I'm sorry once. The same stewardess gave me a warm Apple Juice with No ice. The Flight was delayed for Departure 6 times, starting from 2:36pm, finally taking off 7:50pm. I was late picking up my child from the sitter by 3 hours.

Don’t know they cancelled the flight day before I was to leave. They sent a email at 9:00 pm at night saying they cancelled. That is the smooth way to say we don’t want your business! I think they didn’t have enough people booking so they cancelled the flight! It’s all about the money anymore there is no honesty in business.

Having to reschedule flights a day later, they loaded by luggage on the wrong plane from Little rock now I have to HOPE they deliver it to where im staying like they said would. International flight crew was very disgruntled and not very friendly.

We will be writing a long, detailed letter to corporate about our awful experience with American airlines.

It took way too long to diagnose and solve the problem of a broken crew member cabin seat. Though compensation for the volunteer who left the flight was very kind.

The entertainment package was vast and the selections were very current. Keep updating it was great.

No internet on a flight over three hours in this age is criminal. Staff inattentive and dismissive

They have the most inexperienced / rude flight staff I’ve encountered

very difficult boarding process - aggressive passengers not the friendliest crew

WiFi was not eorkig (again) And the plane was from 1990 with the screens which were.not touch and most didn’t even work and if lucky could tune in tv

I paid extra for a seat closer to the front. The TV didn’t work at all for the entire flight. Would have been nice to know before I purchased an “upgraded “ seat

It was great. I had never flown on JetBlue before, but would be very happy to fly with them in the future.

Worst flight experience ever flights canceled. JetBlue told us just did not even bother standing in line to come back in one and a half hours then without any information we had to go pick up all of our luggage and spend over $2000 in accommodation just to get home. JetBlue said that the next flight available for us to get home would be three days later. Absolutely absurd hasn’t offered to give us any compensation do not fly JetBlue horrible company. They said it was based on the weather and the weather is great in all locations that we would’ve been flying to total hoax. I think it’s a conspiracy theory.

The captain gave good announcements and the flight attendants were friendly. The WiFi was pretty good. The plane itself looked very old inside and the seats were very uncomfortable. The screens in the seat backs were the smallest I’ve ever seen. There were so many loud and obnoxious kids on this flight and the parents didn’t do much to try to quiet them down. Some had videos and games on tablets with higher than necessary volume going the whole time.

Too many long delays with JetBlue. Worst major airline that serves JFK but unfortunately I keep going back because of the prices.

My JetBlue experience was nice. The flights ran on time, the aircraft was clean and comfortable, and the flight attendants were attentive. My only issue, which is isolated to the low-cost (budget) option at JetBlue, is that the check in process makes the user feel that they have to buy their seats. The seats offered for purchase are upgrades from the budget seats you get (which are essentially the last seats remaining). The interface should not make it feel like you must purchase a seat.

For the price, it was a really good experience. There was no entertainment on board, so I couldn't really rate this, and I didn't order a meal. I appreciated that there was a free glass of wine.

Short flight. Everything was fine except the flight was delayed twice for a total of an hour.

My flight from New York to Canada and Canada to Brisbane was canceled, so I had to take united airlines instead flight from New York to Dubai then layover in Dubai 8 hours then from Dubai to Brisbane it was extremely difficult for me , it was a nightmare flying with Canadian airlines unfortunately.

I found the boarding easy and my seat was very comfortable as I had a lot of leg room. I am not too happy that I no longer have lounge access even though I used to get it with my TD credit card.

Flight cancelled. Major disruption to our travel. Do not use Air Canada from KC. To few flights.

Real smooth and easy, Real good leg room in coach!

There labor disputes cancelled my flight less than 24 hours before my boarding time but there customer service/website was easy enough to navigate and they rebooked me for no upcharge.

Re luggage I carried a backpack only. I did not check any bags in. However there were other passengers with carry on luggage going in the plane. My question is why are others allowed to have a carry on luggage inside the plane? Shouldn’t they have dropped it off at the gate? I’m asking because I could have brought the same thing instead of a backpack only. Please clarify for future reference. Thank you.

Like the service. Very hard to communicate or contact when have problems

Very bad, flight was cancelled due to strike and staff was unable to rebook us

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

Information on your arrival and departure airports

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.