Need help booking?
Unpublished phone-only deals available
RER to UNI: distance & flight time
Retalhuleu (Retalhuleu Airport) → Union Island (Union Island International Airport)
2,037 mi
3,278 km · 1,770 nm
4h 28m
estimated nonstop flight time
+2h
time difference · heading east
See live RER→UNI fares Phone-only fares on this route — call free
Flight time details
2,037 miles nonstop takes roughly 4h 28m gate to gate, flying east. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 2-hour time gain when reading arrival times on your ticket.
The two airports
- RER — Retalhuleu Airport · Retalhuleu, Guatemala
- 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 RER
- AAZ · Quezaltenango Airport27 mi away
- TAP · Tapachula International Airport49 mi away
- AQB · Santa Cruz del Quiche Airport50 mi away
- GSJ · San José Airport70 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 RER from UNI?
The flight distance from Retalhuleu (RER) to Union Island (UNI) is 2,037 miles (3,278 km, 1,770 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from RER to UNI?
A nonstop flight takes about 4h 28m 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 RER to UNI?
Nonstop service on RER–UNI 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 4h 28m nonstop estimate.
What is the time difference between Retalhuleu and Union Island?
Union Island is 2 hours ahead of Retalhuleu.
What is the cheapest way to fly from RER to UNI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on RER–UNI that never appear on search engines, with no booking fees.
Why are some RER to UNI fares phone-only?
Consolidator contracts let us sell certain RER–UNI 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.