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GSI to SLU: distance & flight time
Grand-Santi (Grand-Santi Airport) → Castries (George F. L. Charles Airport)
810 mi
1,303 km · 704 nm
2h 14m
estimated nonstop flight time
-1h
time difference · heading northwest
See live GSI→SLU fares Phone-only fares on this route — call free
Flight time details
810 miles nonstop takes roughly 2h 14m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 1-hour time set-back when reading arrival times on your ticket.
The two airports
- GSI — Grand-Santi Airport · Grand-Santi, French Guiana
- SLU — George F. L. Charles Airport · Castries, Saint Lucia
Distances are great-circle ("as the crow flies") — the same basis airlines use for frequent-flyer miles.
Alternate airports can cut this fare
Flying from or into a nearby airport is the #1 trick our agents use to beat online prices. Call and we'll compare every combination on one call.
Near GSI
- SMZ · Stoelmanseiland Airport5 mi away
- DRJ · Drietabbetje Airport24 mi away
- MPY · Maripasoula Airport49 mi away
- LDX · Saint-Laurent-du-Maroni Airport86 mi away
Near SLU
- UVF · Hewanorra International Airport20 mi away
- FDF · Martinique Aimé Césaire International Airport39 mi away
- SVD · Argyle International Airport61 mi away
- BQU · J F Mitchell Airport74 mi away
Frequently asked questions
How far is GSI from SLU?
The flight distance from Grand-Santi (GSI) to Castries (SLU) is 810 miles (1,303 km, 704 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from GSI to SLU?
A nonstop flight takes about 2h 14m gate to gate. Actual time varies with winds, routing and season — eastbound transatlantic flights, for example, are usually faster than the return.
Are there nonstop flights from GSI to SLU?
Nonstop service on GSI–SLU depends on the season and the day of week. Run the fare search on this page with the nonstop filter applied to see current direct options; when there is no nonstop, a single connection through a carrier hub adds roughly 2–4 hours to the 2h 14m nonstop estimate.
What is the time difference between Grand-Santi and Castries?
Castries is 1 hour behind Grand-Santi.
What is the cheapest way to fly from GSI to SLU?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on GSI–SLU that never appear on search engines, with no booking fees.
Why are some GSI to SLU fares phone-only?
Consolidator contracts let us sell certain GSI–SLU tickets below the price airlines permit us to publish online, so those fares can only be quoted over the phone. Call the travel desk and an agent will check phone-only inventory for your dates.