$155 Find Cheap Flights from Boston to Saint Lucia - Compare and Save

1 adult
1 adult, Economy, 0 bags

Save 21% or more on flights. Compare deals from all over the web.

Never overpay with our price tracking tools.

Filter searches by price, airline and more to find your best flights.

Flight Deals
Booking Insights
Flight Deals
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?

The cheapest ticket to Saint Lucia from Boston found in the last 5 days was to Castries, at $903 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 $903.

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

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 $726 on average.

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

The cheapest month for flights from Boston to Saint Lucia is January, when tickets cost $493 (return) on average. On the other hand, the most expensive months are December and July, when the average cost of round-trip tickets is $849 and $842 respectively.

Good to know

Low season

June

Cheapest flight

$155
Best time to beat the crowds but there is an average 8% increase in price.
Most popular time to fly with an average 26% 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 8531 reviews
8.1Boarding
8.5Crew
7.2Food
7.8Comfort
7.8Entertainment
Airline reviews

Stewardess was not accommodating when I requested a second drink.

8.0 ExcellentAnonymous, Aug 2026
Read more Delta reviews

Stewardess was not accommodating when I requested a second drink.

Although I know the Airlines cannot control the situation when there’s a ground stoppage, it would’ve been nicer if we would have had more up-to-date information clarity around the delays. Additionally, I think the delays also took a toll on the Cabin crew, particularly the lead flight attendant in first class. She was not very friendly when we boarded the plane for many of the passengers. Number one she refused to hang a garment bag in the front closet for a first class passenger, she was unwilling to dispose of an empty bottle in the trash as I was boarding (despite drinking a bottle of water herself and needing to disregard), and she was very combative with a passenger, who needed to access something from his bag that was Gate checked. Frankly, it was really unfortunate as I’ve never seen a flight attendant behave that way directly to the passengers, particularly when none of us had done anything wrong.

Flight from Savannah arrived very late and we did not take off till 2 hours after scheduled departure!

Very good seat and service. No complaints about the food. Take off delayed due to airport traffic

It is usually very pleasant. Good service for the price, international flights are even better

Flight attendant was very poor in taking care or showing attention. I slept up front for a few and missed the snacks. She saw me many times, went by me many times and never once asked if I needed anything. The whole 2 hours flight. And this is to a Diamond member in first.

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 flight was delayed in 30 minute increments for a total of 4 hours and 30 minute delay. All other flights to Chicago left on time except for this one flight. If there is an issue with the inbound flight, just let customers know so they can find another flight right away, Once we got on the plane there was another 30 minute delay taking off at 10:30 at night which is very unusual that a flight wouldn't be ready to take off

They have overselled the ticket and kicked me out from boarding, All my Plans were collapsed and important network meeting missed.also I booked direct flight i have to go through an 1 stop and it was frustrated.

Horrific. We were delayed due a flight attendant stuck in traffic en route to the airport. Over 100 people were then stuck in Charolette. Then I ran to make my layover only to find that my connection didn’t have a plane anymore. Waited 2.5 hours without any updates. On the flight we had to beg for even a pretzel option.

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.

The series of delays were very unfortunately - first the captain timed out, then the new captain didn't show up when we were told he would, then the first officer timed out. Those delays were compounded by after boarding, weather came in - obviously that's out of JB's control but it was frustrating after all of the other delays that seemed avoidable.

3 hours late JetBlue flight made me miss my connecting flight to Nairobi Kenya, they did not even offer me hotel accommodation, I paid out of my pocket, they did not know where my luggage was, let say my experience with JetBlue was nightmare.

Crew at first tried to SELL snack boxes (for an hour-long flight?!?), and it was the only leg of four on which I was charged for a hard seltzer. 😕 Spent extra to select seats in Row 8 for quicker disembarking only to be seated in Row 25. Someone owes me $38 for that!

It was my worse flying experience. It was my first time and last time flying with Jet Blue.

Flight was cancelled as JetBlue could not find a pilot. Communication was poor and they did nothing for stranded passengers. Flight they rebooked us on was 4 days out.

JetBlue cancelled the flight along with hundreds of others, for no apparent reason. no recourse, no rebooking options. never booking with them again

Jet Blue cancelled my flight after I had boarded. They attempted to rebook me for a new flight two days later. I was able to rebook with a different airline, but not until the next morning. As such, I was forced to get an expensive hotel and missed important work meetings Monday morning. I am very disappointed with the customer service and will be pursuing full reimbursement for my hotel cost.

Flight delayed 4 times on a non-stop from BOS to SFO. Then when landed in SFO had to wait for 30 mins for a gate AT 3:30AM.

Horrible - for the first time in my life i was denied boarding an international flight because the name used on my ticket - Josh - was not exactly the same as my passport - Joshua. At no time during ticketing, online check-in, or at the airport flying from Boston to NY was i notified of a problem. It was only at boarding from NY to Costa Rica I was informed of the problem and by then it was too late. After missing the flight I was told by airport Jet Blue staff, including a supervisor, that it was my problem and they could not assist because i bought "the cheapest fare". i was hung up on twice by JetBlue customer service, including once by a supervisor. I blame Kayak and your awful partner ChatDeal for even allowing me to purchase an international ticket without verifying this - you effectively sold me a ticket i could not use. Shame on you and shame on ChatDeal for doing nothing to help me resolve the situation. What a scam.

The flight kept getting delayed, but the ground crew did not communicate well to the passengers in the terminal. First, we were told that it was an engine issue. That was understandable. We asked, after the third delay, if it would be canceled; they reassured us that that would not happen because a new plane was on its way from Washington DC. Four hours later, that is exactly what happened. No announcement was made only people who had the JetBlue app learned of the cancellation. They rebooked us on a flight that would get into our destination 36 hours after our original time I had to spend an exorbitant amount of money to book an additional flight with a different airline, the following morning in order to make it to my conference in time. Not to mention the fact that by the time I discovered the cancellation on the departures board, it was too late for me to receive a refund on my lodging in the destination city for that night. Because I had booked with KAYAK, I did not receive any JetBlue email with rebooking information. This is what the information information desk kept telling everyone who inquired about a rebooking. This was my first time flying with JetBlue. Needless to say, after extremely poor communication andover $1000 of additional expense later, I will not be flying with them again.

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

Information on your arrival and departure airports