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SLU to UNI: distance & flight time
Castries (George F. L. Charles Airport) → Union Island (Union Island International Airport)
102 mi
164 km · 89 nm
44m
estimated nonstop flight time
Same time
time difference · heading south
See live SLU→UNI fares Phone-only fares on this route — call free
Flight time details
102 miles nonstop takes roughly 44m gate to gate, flying south. Add 45–90 minutes per connection if there's no nonstop service. Both airports share the same local time, so schedules read exactly as flown.
The two airports
- SLU — George F. L. Charles Airport · Castries, Saint Lucia
- UNI — Union Island International Airport · Union Island, Saint Vincent and the Grenadines
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 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
Near UNI
- CIW · Canouan Airport8 mi away
- MQS · Mustique Airport25 mi away
- BQU · J F Mitchell Airport29 mi away
- SVD · Argyle International Airport42 mi away
Frequently asked questions
How far is SLU from UNI?
The flight distance from Castries (SLU) to Union Island (UNI) is 102 miles (164 km, 89 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from SLU to UNI?
A nonstop flight takes about 44m gate to gate. Actual time varies with winds, routing and season — eastbound transatlantic flights, for example, are usually faster than the return.
What is the cheapest way to fly from SLU to UNI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on SLU–UNI that never appear on search engines, with no booking fees.