Fastest€377.15
- JetBlue Airways JB989106:474h 58m11:45Boston BEDCastries UVF
Door to door 8h 8mCO2 502.8 kgChanges 0Fixed, no changes
Boston to Castries flight
Flights from Boston to Castries start at €331.13 and take 8h 8m at their fastest.
The Flights from Boston to Castries starts at €331.13 and takes 8h 8m door to door, run by 1 operator over 3,397 km, with around 4 departures a day. Fares bottom out about 60 days before departure.
- 8h 8mDoor to door
- 4h 58mMoving
- €331.13From
- 502.8 kgCO2
The cheapest and the fastest on September 29, 2026
Two journeys we can sell today, with the service number each operator files them under.
Airlines
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 |
The flight gets you into Castries. It does not get you a bed, and neither do we.
Rooms within reach of Castries to Odsan/Cul-de-Sac BusStand
Sort by distance from Castries to Odsan/Cul-de-Sac BusStand and you can see which places are ten minutes on foot and which are not.
Search Castries on Booking.com
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When to book Boston to Castries
The same search run across the whole booking window, so the shape of the curve is visible rather than described.
- €331.1390 days
- €249.1260 days
- €285.1145 days
- €281.9430 days
- €356.1921 days
- €480.4914 days
- €605.487 days
- €752.983 days
- €800.181 days
- Cheapest lead time
- Fares bottom out around 60 days ahead, at €249.12.
- How much it moves
- The gap between the cheapest and most expensive lead time is 221 percent. The most expensive point is €800.18, 1 days out.
- What that means
- Today sits inside the cheap window, which closes about 60 days before departure. Waiting from here has usually cost money on this corridor rather than saved it.
Which departure day costs least
Median cheapest fare for each weekday, taken across the next three weeks of real prices.
- €393.67Sun
- €331.13Mon
- €401.34Tue
- €375.38Wed
- €480.49Thu
- €426.04Fri
- €458.49Sat
Where you leave from and where you arrive
The stations, airports and ports each mode on this corridor actually uses.
Boston
Air
- BOS
- BED
Castries
Air
- UVF
- SLU
What the journey actually looks like
Direct or connecting, how far the route really runs, and what happens when a connection is missed.
- Direct or connecting
- 20% of the services we sell on this corridor run through without a change. The remaining 80% involve one connection.
- How far it really runs
- The route covers 3,397 km against 3,298 km in a straight line, a detour of 3 percent. Track and road geometry account for the difference.
- Where the change is
- Connections are made at Miami, New York City, Bridgetown, Charlotte. The gap between arriving and leaving is 60 minutes, of which about 5 is walking.
- If the connection is missed
- The tightest connection we sell here has a 16 percent chance of not being made on the timetable alone. Part of this journey is a self transfer between separate tickets, so leave more time than the minimum and expect to check in again.
- First and last departure
- The first service of the day leaves Boston at 06:47 and the last at 07:30, across 4 departures. The return direction keeps its own timetable, so the times back are not these times reversed.
Questions about Boston to Castries
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.
How long does the Flight from Boston to Castries take?
The Flight from Boston to Castries takes 8h 8m door to door, of which 4h 58m is spent moving. The route runs 3,397 km. The difference between the two times is reaching the terminal and leaving it at the far end, which every time on this page includes.
How much does the Flight from Boston to Castries cost?
The Flight from Boston to Castries starts at €331.13 for one passenger, checked on September 29, 2026. A typical fare is €383.94. Both are the total including taxes, supplier fees and our service fee, so the price here is the price at checkout.
Who runs the Flight from Boston to Castries?
1 operators run the Flight from Boston to Castries: JetBlue Airways. Between them they file around 4 departures a day. The operator table on this page compares them on fare, journey time, cruising speed, fare conditions and what is provided on board.
Which terminal does the Flight from Boston to Castries use?
The Flight from Boston to Castries leaves from Boston BED and arrives at Castries UVF. Allow about 3h 10m for reaching the departure terminal and leaving the arrival one. That time is already inside every door to door figure quoted on this page.
When should I book the Flight from Boston to Castries?
Fares for the Flight from Boston to Castries bottom out around 60 days ahead, at €249.12. The gap between the cheapest and most expensive lead time across the window is 221 percent, measured on September 29, 2026. Booking inside the final week has consistently cost more.
How much CO2 does the Flight from Boston to Castries produce?
The Flight from Boston to Castries produces about 502.8 kg of CO2 per passenger over 3397 km, which works out at roughly 148 grams per passenger kilometer. That figure is for the whole journey and for one traveler, not for the vehicle.
Where these numbers come from
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
- On this page
- Every figure above was computed for Boston to Castries on September 10, 2026: 3397 km of route against 3298 km in a straight line, 4 services a day, 1 operators, a cheapest fare of €331.13, and 8h 8m door to door on the fastest mode. The return direction is computed separately and its numbers are not these numbers.
Related journeys
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The fare from UVF into Castries is the one price on this trip we cannot show you, because it is not ours.
Getting from UVF into Castries?
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.