$135+ 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 1/11. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — UVF
Aug 14 — Aug 211
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Boston to Saint Lucia with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Boston to Saint Lucia
Cheapest
Best
Last-minute
One-way
Cheapest flights from Boston to Saint LuciaExplore 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 July 15, 2026.
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 July 15, 2026.
This Delta deal was found by Cheapflights users on 7/11. 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.
Wed 8/265:30 am
BOS
- UVF
1 stop8h 44m
Delta
Wed 9/23:34 pm
UVF
- BOS
1 stop9h 51m
Delta
Deal found 7/11![Delta logo]()
$370
This Delta deal was found by Cheapflights users on 7/14. 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.
Thu 8/275:30 am
BOS
- UVF
1 stop8h 44m
Delta
Mon 8/313:34 pm
UVF
- BOS
1 stop9h 51m
Delta
Deal found 7/14![Delta logo]()
$390
This Delta deal was found by Cheapflights users on 7/12. 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.
Wed 10/145:45 am
BOS
- UVF
1 stop8h 41m
Delta
Wed 10/213:41 pm
UVF
- BOS
1 stop9h 17m
Delta
Deal found 7/12![Delta logo]()
$464
This Delta deal was found by Cheapflights users on 7/14. 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 11/238:15 pm
BOS
- UVF
1 stop17h 55m
Delta
Wed 11/254:25 pm
UVF
- BOS
1 stop9h 33m
Delta
Deal found 7/14![Delta logo]()
$484
This United Airlines deal was found by Cheapflights users on 7/15. 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 9/196:00 am
BOS
- UVF
1 stop7h 31m
United Airlines
Sat 9/262:35 pm
UVF
- BOS
2 stops20h 29m
United Airlines
Deal found 7/15![United Airlines logo]()
$493
This Air Canada deal was found by Cheapflights users on 7/13. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/245:00 pm
BOS
- UVF
1 stop22h 40m
Air Canada
Mon 10/264:40 pm
UVF
- BOS
1 stop25h 18m
Air Canada
Deal found 7/13![Air Canada logo]()
$514
This United Airlines deal was found by Cheapflights users on 7/11. 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 11/76:00 am
BOS
- UVF
1 stop9h 25m
United Airlines
Sat 11/145:17 pm
UVF
- BOS
1 stop15h 27m
United Airlines
Deal found 7/11![United Airlines logo]()
$523
This United Airlines deal was found by Cheapflights users on 7/12. 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 11/286:00 am
BOS
- UVF
1 stop9h 25m
United Airlines
Sat 12/51:52 pm
UVF
- BOS
1 stop12h 14m
United Airlines
Deal found 7/12![United Airlines logo]()
$544
This Gotogate deal was found by Cheapflights users on 7/13. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/186:00 am
BOS
- SLU
2 stops13h 00m
Multiple Airlines
Sun 10/2512:35 pm
SLU
- BOS
2 stops21h 23m
Multiple Airlines
Deal found 7/13![Multiple Airlines logo]()
$844
This Gotogate deal was found by Cheapflights users on 7/15. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/317:40 pm
BOS
- SLU
2 stops23h 20m
Multiple Airlines
Sat 11/712:35 pm
SLU
- BOS
2 stops22h 23m
Multiple Airlines
Deal found 7/15![Multiple Airlines logo]()
$868
This Gotogate deal was found by Cheapflights users on 7/14. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/265:30 am
BOS
- SLU
2 stops13h 30m
Multiple Airlines
Sun 11/112:35 pm
SLU
- BOS
2 stops22h 23m
Multiple Airlines
Deal found 7/14![Multiple Airlines logo]()
$873
This Air Canada deal was found by Cheapflights users on 7/10. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/264:55 pm
BOS
- SLU
2 stops26h 05m
Multiple Airlines
Sat 10/1012:35 pm
SLU
- BOS
2 stops21h 20m
Multiple Airlines
Deal found 7/10![Multiple Airlines logo]()
$882
Best flights from Boston to Saint LuciaDiscover carefully curated flight deals from Boston to Saint Lucia that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 15, 2026.
Discover carefully curated flight deals from Boston to Saint Lucia that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 15, 2026.
This Delta deal was found by Cheapflights users on 7/11. 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.
Wed 8/265:30 am
BOS
- UVF
1 stop8h 44m
Delta
Wed 9/23:34 pm
UVF
- BOS
1 stop9h 51m
Delta
Deal found 7/11![Delta logo]()
$370
This United Airlines deal was found by Cheapflights users on 7/13. 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 9/126:00 am
BOS
- UVF
1 stop7h 31m
United Airlines
Sat 9/192:35 pm
UVF
- BOS
1 stop17h 42m
United Airlines
Deal found 7/13![United Airlines logo]()
$588
This JetBlue deal was found by Cheapflights users on 7/11. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/205:16 am
BOS
- UVF
1 stop7h 18m
JetBlue
Thu 8/271:59 pm
UVF
- BOS
1 stop10h 00m
JetBlue
Deal found 7/11![JetBlue logo]()
$608
This Delta deal was found by Cheapflights users on 7/14. 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.
Thu 8/275:30 am
BOS
- UVF
1 stop8h 44m
Delta
Mon 8/313:34 pm
UVF
- BOS
1 stop9h 51m
Delta
Deal found 7/14![Delta logo]()
$390
This Gotogate deal was found by Cheapflights users on 7/14. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/265:30 am
BOS
- SLU
2 stops13h 30m
Multiple Airlines
Sun 11/112:35 pm
SLU
- BOS
2 stops22h 23m
Multiple Airlines
Deal found 7/14![Multiple Airlines logo]()
$873
This United Airlines deal was found by Cheapflights users on 7/10. 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
2 stops25h 52m
United Airlines
Deal found 7/10![United Airlines logo]()
$593
This JetBlue deal was found by Cheapflights users on 7/12. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/295:01 am
BOS
- UVF
1 stop7h 50m
JetBlue
Tue 9/11:50 pm
UVF
- BOS
1 stop10h 09m
JetBlue
Deal found 7/12![JetBlue logo]()
$608
This United Airlines deal was found by Cheapflights users on 7/10. 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 9/266:00 am
BOS
- UVF
1 stop7h 31m
United Airlines
Sat 10/102:35 pm
UVF
- BOS
1 stop28h 50m
United Airlines
Deal found 7/10![United Airlines logo]()
$595
This Air Canada deal was found by Cheapflights users on 7/10. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/264:55 pm
BOS
- SLU
2 stops26h 05m
Multiple Airlines
Sat 10/1012:35 pm
SLU
- BOS
2 stops21h 20m
Multiple Airlines
Deal found 7/10![Multiple Airlines logo]()
$882
This FlightHub deal was found by Cheapflights users on 7/13. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/124:55 pm
BOS
- SLU
2 stops26h 05m
Multiple Airlines
Sat 9/1912:35 pm
SLU
- BOS
2 stops21h 20m
Multiple Airlines
Deal found 7/13![Multiple Airlines logo]()
$882
This Air Canada deal was found by Cheapflights users on 7/11. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/65:30 am
BOS
- SLU
2 stops12h 30m
Multiple Airlines
Mon 1/1112:35 pm
SLU
- BOS
2 stops22h 23m
Multiple Airlines
Deal found 7/11![Multiple Airlines logo]()
$902
This Air Canada deal was found by Cheapflights users on 7/13. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/55:30 am
BOS
- SLU
2 stops12h 30m
Multiple Airlines
Mon 11/912:35 pm
SLU
- BOS
2 stops22h 23m
Multiple Airlines
Deal found 7/13![Multiple Airlines logo]()
$902
This Air Canada deal was found by Cheapflights users on 7/14. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/286:00 am
BOS
- SLU
2 stops13h 00m
Multiple Airlines
Mon 8/3112:35 pm
SLU
- BOS
2 stops21h 18m
Multiple Airlines
Deal found 7/14![Multiple Airlines logo]()
$912
This Air Canada deal was found by Cheapflights users on 7/11. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/226:35 pm
BOS
- SLU
2 stops23h 25m
Multiple Airlines
Sun 11/2912:35 pm
SLU
- BOS
2 stops22h 23m
Multiple Airlines
Deal found 7/11![Multiple Airlines logo]()
$932
This Air Canada deal was found by Cheapflights users on 7/12. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/56:35 pm
BOS
- SLU
2 stops23h 25m
Multiple Airlines
Sat 12/1212:35 pm
SLU
- BOS
2 stops26h 42m
Multiple Airlines
Deal found 7/12![Multiple Airlines logo]()
$937
This Mytrip deal was found by Cheapflights users on 7/13. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/1810:40 am
BOS
- SLU
3 stops32h 20m
Multiple Airlines
Sun 10/255:00 am
SLU
- BOS
3 stops29h 17m
Multiple Airlines
Deal found 7/13![Multiple Airlines logo]()
$1,064
This Mytrip deal was found by Cheapflights users on 7/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/196:00 am
BOS
- SLU
2 stops13h 00m
Multiple Airlines
Sun 8/2312:35 pm
SLU
- BOS
3 stops23h 17m
Multiple Airlines
Deal found 7/10![Multiple Airlines logo]()
$1,080
This Air Canada deal was found by Cheapflights users on 7/12. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/16:00 am
BOS
- SLU
2 stops13h 00m
Multiple Airlines
Sat 8/812:35 pm
SLU
- BOS
2 stops21h 18m
Multiple Airlines
Deal found 7/12![Multiple Airlines logo]()
$1,083
Last-minute flights from Boston to Saint LuciaDiscover last-minute flight deals from Boston to Saint Lucia. Data last updated July 15, 2026 and is based on user searches.
Discover last-minute flight deals from Boston to Saint Lucia. Data last updated July 15, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 7/11. 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.
Tue 7/285:10 am
BOS
- UVF
1 stop8h 40m
American Airlines
Sat 8/12:22 pm
UVF
- BOS
1 stop9h 28m
American Airlines
Deal found 7/11![American Airlines logo]()
$558
This American Airlines deal was found by Cheapflights users on 7/10. 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 7/297:27 pm
BOS
- UVF
2 stops18h 53m
American Airlines
Sat 8/13:32 pm
UVF
- BOS
2 stops18h 23m
American Airlines
Deal found 7/10![American Airlines logo]()
$568
This American Airlines deal was found by Cheapflights users on 7/10. 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 8/16:00 am
BOS
- UVF
1 stop7h 16m
American Airlines
Wed 8/52:49 pm
UVF
- BOS
1 stop25h 21m
American Airlines
Deal found 7/10![American Airlines logo]()
$570
This American Airlines deal was found by Cheapflights users on 7/10. 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 8/55:45 pm
BOS
- UVF
1 stop20h 34m
American Airlines
Sat 8/82:04 pm
UVF
- BOS
1 stop8h 46m
American Airlines
Deal found 7/10![American Airlines logo]()
$573
This American Airlines deal was found by Cheapflights users on 7/11. 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 8/107:43 pm
BOS
- UVF
2 stops18h 06m
American Airlines
Mon 8/173:19 pm
UVF
- BOS
2 stops18h 53m
American Airlines
Deal found 7/11![American Airlines logo]()
$582
This American Airlines deal was found by Cheapflights users on 7/14. 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 8/138:45 pm
BOS
- UVF
2 stops17h 34m
American Airlines
Mon 8/173:19 pm
UVF
- BOS
2 stops18h 53m
American Airlines
Deal found 7/14![American Airlines logo]()
$583
This Delta deal was found by Cheapflights users on 7/10. 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.
Sat 8/225:30 am
BOS
- UVF
1 stop8h 44m
Delta
Fri 8/283:34 pm
UVF
- BOS
1 stop9h 51m
Delta
Deal found 7/10![Delta logo]()
$464
This Gotogate deal was found by Cheapflights users on 7/14. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/257:15 pm
BOS
- SLU
2 stops23h 45m
Multiple Airlines
Mon 8/3112:35 pm
SLU
- BOS
2 stops21h 18m
Multiple Airlines
Deal found 7/14![Multiple Airlines logo]()
$893
This Delta deal was found by Cheapflights users on 7/11. 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.
Wed 8/265:30 am
BOS
- UVF
1 stop8h 44m
Delta
Wed 9/23:34 pm
UVF
- BOS
1 stop9h 51m
Delta
Deal found 7/11![Delta logo]()
$370
This American Airlines deal was found by Cheapflights users on 7/11. 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 8/267:34 pm
BOS
- UVF
2 stops18h 45m
American Airlines
Wed 9/22:49 pm
UVF
- BOS
2 stops16h 54m
American Airlines
Deal found 7/11![American Airlines logo]()
$569
This Delta deal was found by Cheapflights users on 7/14. 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.
Thu 8/275:30 am
BOS
- UVF
1 stop8h 44m
Delta
Mon 8/313:34 pm
UVF
- BOS
1 stop9h 51m
Delta
Deal found 7/14![Delta logo]()
$390
This Air Canada deal was found by Cheapflights users on 7/14. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/286:00 am
BOS
- SLU
2 stops13h 00m
Multiple Airlines
Mon 8/3112:35 pm
SLU
- BOS
2 stops21h 18m
Multiple Airlines
Deal found 7/14![Multiple Airlines logo]()
$912
One-way flights from Boston to Saint LuciaSearch for one-way flight options from Boston to Saint Lucia. Find affordable one-way fares based on user searches. Data last updated July 15, 2026.
Search for one-way flight options from Boston to Saint Lucia. Find affordable one-way fares based on user searches. Data last updated July 15, 2026.
This Delta deal was found by Cheapflights users on 7/13. 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.
Sun 1/108:15 pm
BOS
- UVF
1 stop17h 50m
Delta
Deal found 7/13![Delta logo]()
$135
This Delta deal was found by Cheapflights users on 7/15. 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.
Thu 8/138:45 pm
BOS
- UVF
1 stop17h 29m
Delta
Deal found 7/15![Delta logo]()
$145
This United Airlines deal was found by Cheapflights users on 7/12. 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.
Fri 9/118:30 pm
BOS
- UVF
1 stop17h 01m
United Airlines
Deal found 7/12![United Airlines logo]()
$194
This Air Canada deal was found by Cheapflights users on 7/11. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/245:00 pm
BOS
- UVF
1 stop22h 40m
Air Canada
Deal found 7/11![Air Canada logo]()
$206
This United Airlines deal was found by Cheapflights users on 7/11. 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.
Thu 9/108:31 pm
BOS
- UVF
2 stops41h 00m
United Airlines
Deal found 7/11![United Airlines logo]()
$215
This Air Canada deal was found by Cheapflights users on 7/11. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/104:55 pm
BOS
- UVF
1 stop21h 20m
Air Canada
Deal found 7/11![Air Canada logo]()
$223
This Air Canada deal was found by Cheapflights users on 7/11. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/810:50 am
BOS
- UVF
1 stop27h 25m
Air Canada
Deal found 7/11![Air Canada logo]()
$225
This Air Canada deal was found by Cheapflights users on 7/11. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/76:50 pm
BOS
- UVF
2 stops43h 25m
Air Canada
Deal found 7/11![Air Canada logo]()
$229
This United Airlines deal was found by Cheapflights users on 7/11. 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.
Fri 10/98:25 pm
BOS
- UVF
1 stop17h 06m
United Airlines
Deal found 7/11![United Airlines logo]()
$230
This Trip.com deal was found by Cheapflights users on 7/13. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/1910:05 am
BOS
- SLU
2 stops22h 05m
Multiple Airlines
Deal found 7/13![Multiple Airlines logo]()
$530
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 July 15, 2026.
Round-trip from | $370 (Delta) |
|---|---|
One-way from | $135 (Delta) |
Popular in | April |
Cheapest in | August |
Average price | $911 |
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 July 15, 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
Cheapest round-trip
BostonCastries
BOS - UVF
BOSUVF
Boston Logan Intl
Wed 8/26
5:30 am-2:14 pm
1 stop8h 44m
Castries Hewanorra
Wed 9/2
3:34 pm-1:25 am
1 stop9h 51m
$370
BostonCastries
BOS - UVF
BOSUVF
Boston Logan Intl
Thu 8/27
5:30 am-2:14 pm
1 stop8h 44m
Castries Hewanorra
Mon 8/31
3:34 pm-1:25 am
1 stop9h 51m
$390
BostonCastries
BOS - UVF
BOSUVF
Boston Logan Intl
Sat 9/12
6:00 am-1:31 pm
1 stop7h 31m
Castries Hewanorra
Sat 9/19
2:35 pm-8:17 am
1 stop17h 42m
$588
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-4:27 pm
2 stops25h 52m
$593
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-7:25 pm
1 stop28h 50m
$595
Quickest round-trip
BostonCastries
BOS - UVF
BOSUVF
Boston Logan Intl
Thu 8/20
5:16 am-12:34 pm
1 stop7h 18m
Castries Hewanorra
Thu 8/27
1:59 pm-11:59 pm
1 stop10h 00m
$608
BostonCastries
BOS - UVF
BOSUVF
Boston Logan Intl
Sat 8/29
5:01 am-12:51 pm
1 stop7h 50m
Castries Hewanorra
Tue 9/1
1:50 pm-11:59 pm
1 stop10h 09m
$608
BostonCastries
BOS - SLU
BOSSLU
Boston Logan Intl
Mon 10/26
5:30 am-7:00 pm
2 stops13h 30m
Castries George F. L. Charle
Sun 11/1
12:35 pm-9:58 am
2 stops22h 23m
$873
BostonCastries
BOS - SLU
BOSSLU
Boston Logan Intl
Sat 9/26
4:55 pm-7:00 pm
2 stops26h 05m
Castries George F. L. Charle
Sat 10/10
12:35 pm-9:55 am
2 stops21h 20m
$882
BostonCastries
BOS - SLU
BOSSLU
Boston Logan Intl
Sat 9/12
4:55 pm-7:00 pm
2 stops26h 05m
Castries George F. L. Charle
Sat 9/19
12:35 pm-9:55 am
2 stops21h 20m
$882
Showing 1-10 of 29 resultsSorted by cheapest first
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.
BOS-UVF
BOS-SLU
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
BOS-LC0
BOS-UVF
BOS-SLU
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 $131). Flying from Boston to Saint Lucia in September is currently the most expensive (average of $537). 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 July 15, 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.
Food
7.2
Entertainment
7.8
Comfort
7.8
Crew
8.5
Overall
7.8
Boarding
8.1
Reviews
1 / 20
6.0
GoodCidalia,Aug 2023
BOS - MIA
Food
7.2
Entertainment
7.8
Comfort
7.8
Crew
8.5
Overall
7.8
Boarding
8.1
Reviews
1 / 20
6.0
GoodCidalia,Aug 2023
BOS - MIA
Food
7.2
Entertainment
7.8
Comfort
7.8
Crew
8.5
Overall
7.8
Boarding
8.1
Reviews
1 / 20
6.0
GoodCidalia,Aug 2023
BOS - MIA
Food
7.2
Entertainment
7.8
Comfort
7.8
Crew
8.5
Overall
7.8
Boarding
8.1
Reviews
1 / 20
6.0
GoodCidalia,Aug 2023
BOS - MIA
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.
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.
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Popular flights
Alternative routes for Boston to Saint Lucia
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Saint Lucia by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Boston to Saint Lucia by cabin class
Find flights from Boston to Saint Lucia, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Boston and Saint Lucia flights
Browse other Boston and Saint Lucia flight options. Last updated on July 15, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
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 July 15, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$134 | Average$537 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$292 | Average$598 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$382 | Average$670 | FlexibilityNo cancel fee | On-time62% |