Compare trains, buses, flights and ferries from Boston to Castries. From €302.29, fastest 7h 53m, with the total price and every fee shown up front.
Traveling from Boston to Castries costs €302.29 at the cheapest and takes 7h 53m door to door at the fastest, across 1 mode and 1 operator. The route covers 3,397 km. Cheapest is by Flight, fastest is by Flight.
Journey times below are door to door, so they include getting to the terminal and away from it at the other end. Fares are the cheapest we currently sell on September 29, 2026.
| Mode | Door to door | Moving | At the ends | From | CO2 | Per day |
|---|---|---|---|---|---|---|
| Flight | 8h 8m | 4h 58m | 3h 10m | €331.13 | 502.8 kg | 4 |
Two journeys we can sell today, with the service number each operator files them under.
Changes at New York City, with 77 minutes between services and a walk of about 14 minutes.
Door to door 10h 17mCO2 502.2 kgChanges 1Fixed, no changes
Door to door 8h 8mCO2 502.8 kgChanges 0Fixed, no changes
Live from the operators' own published timetables, through the open transit feeds they publish. Times and services are real. Fares are modeled until our booking connectors are live.
Live from the operators' own published timetables, through the open transit feeds they publish. Times and services are real. Fares are modeled until our booking connectors are live.
Live from our own engine, refreshed on every request. The cheapest days for each way of traveling are marked.
| Cheapest fare by mode and day for Boston to Castries | SatSep 12 | SunSep 13 | MonSep 14 | TueSep 15 | WedSep 16 | ThuSep 17 | FriSep 18 | SatSep 19 | SunSep 20 | MonSep 21 | TueSep 22 | WedSep 23 | ThuSep 24 | FriSep 25 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Flight | €725.25 | €752.98 | €506.36 | €452.67 | €563.59 | €605.48 | €561.23 | €491.61 | €393.67 | €331.13 | €401.34 | €375.38 | €587.19 | €411.96 |
| Train | €682.89 | €805.54 | €442.54 | €447.49 | €481.59 | €607.54 | €426.04 | €429.34 | €455.19 | €396.89 | €467.29 | €440.34 | €480.49 | €417.79 |
Cheapest day: 2026-09-29 · €302.29
Castries sits on the water, which usually settles which side of town you want to wake up on. Rooms are not ours to sell.
Hotels and apartments near downtown, most of them with free cancellation, on a map that shows what is walkable.
Search Castries on Booking.com
Partner links. We do not sell accommodation. We earn a commission when a booking completes, and it never changes what you pay.
The same search run across the whole booking window, so the shape of the curve is visible rather than described.
Book now Fares on this route are lowest around 60 days ahead. You are inside that window.
Median cheapest fare for each weekday, taken across the next three weeks of real prices.
The same journey priced on the fifteenth of each of the next six months.
Direct or connecting, how far the route really runs, and what happens when a connection is missed.
The stations, airports and ports each mode on this corridor actually uses.
The fare from UVF into Castries is the one price on this trip we cannot show you, because it is not ours.
Settled in advance, so the ride into Castries costs what it said it would rather than what the cab stand says.
Book a ride from UVF with Daytrip
Partner links. We do not operate transfers. We earn a commission on a booking, and the fare is the same as going direct.
Speed, flexibility and what is on board. Nothing here is a rating, because we have not earned one.
| Operator | From | Fastest | Typical speed | Flexibility | On board |
|---|---|---|---|---|---|
 JetBlue Airways | €303.40 | 7h 53m | 740 km/h | Fixed fare | Not published |
Every part of the total, so the number at checkout is the number here.
| Part | Amount | Share |
|---|---|---|
| Operator fare | €273.00 | 90% |
| Taxes | €27.30 | 9% |
| Our service fee | €1.99 | 1% |
| Total you pay | €302.29 | 100% |
Castries is small enough to see in an afternoon, which is easier without the luggage. Storing it is not our business.
Stores, cafes and hotels that take luggage, with the hours on the map so you know what is still open when you come back.
Check Castries on StasherOr try Bounce
Partner links. We do not run these networks. We earn a commission on a booking, and the price is the same as going direct.
The questions people actually ask about this trip, answered from the same prices and times the page above is built on rather than written once and left to go stale.
The fastest journey from Boston to Castries takes 7h 53m door to door, of which 4h 58m is spent moving, on the Flight. Most services take around 8h 8m, because that average includes slower stopping services and journeys with a connection. Times include reaching the terminal and leaving it at the far end.
The cheapest fare from Boston to Castries is €302.29, checked on September 29, 2026. A typical fare across the next three weeks is €452.67. Both figures are the total for one passenger, including taxes, supplier fees and our service fee, so nothing is added at checkout.
The cheapest way from Boston to Castries is by Flight, at €331.13 for one passenger on September 29, 2026. That journey takes 8h 8m door to door. Cheaper is rarely faster on this corridor, and the comparison table on this page shows what each mode costs against what it saves.
Fares from Boston to Castries bottom out around 60 days before departure, at €213.72. Across the whole booking window the gap between the cheapest and the most expensive lead time is 220 percent, measured on September 29, 2026. Booking inside the last week has consistently cost more on this corridor.
Monday is the cheapest day to depart from Boston to Castries, at €331.13. That is the median of 21 priced departure days across the next three weeks, checked on September 29, 2026. Shifting a departure by one day is usually worth more than shifting the booking by one week.
February is the cheapest of the next 6 months to travel from Boston to Castries, at €238.50 for one passenger. Each month is priced on its fifteenth, so the comparison is like for like rather than a mix of weekends and midweek departures.
1 operators sell services from Boston to Castries across 1 modes: JetBlue Airways. Journey times, fares and fare conditions differ between them, and the operator table on this page compares all of them on speed, flexibility and what is provided on board.
20 percent of the services we sell from Boston to Castries are direct. The rest connect at Miami, New York City, Bridgetown, Charlotte, with about 60 minutes between the two services. Both legs are sold on one booking, so a missed connection is rebooked at no charge.
Services from Boston to Castries by Flight leave from Boston BED and arrive at Castries UVF. Allow about 3h 10m in total for reaching the departure terminal and leaving the arrival one, which is already included in every door to door time on this page.
0 of the 1 operators we sell from Boston to Castries allow a change or a refund. A change on a changeable fare costs €5.00. The operator table on this page names which is which, and the condition is shown again before you pay.
Observed service A carrier record shows this named operator serving this named pair, and we carry that through unchanged.
Schedules, seat counts and fares are generated by our own model until the supplier contracts are signed. Places, coordinates, operators, which operator serves which pair, and every distance are real. We would rather say that on every page than let a modeled number pass for a filed one.
Defined in full at Door to door, Fares, The booking window, Carbon, Distances
Our job ends at the platform. What fills the days in Castries afterward does not belong to us.
Day trips that leave Castries in the morning and cover a good part of St. Lucia by evening.
See Castries on CivitatisOr browse GetYourGuide
Partner links. We do not sell tours or tickets. We earn a commission on a booking, and it never changes the price.
Plan a trip from here
Ask Ori for the same corridor under a different constraint, or for a longer trip that starts on it.