Need help booking?
Unpublished phone-only deals available
JSY to ONT: distance & flight time
Syros Island (Syros Airport) → Ontario (Ontario International Airport)
6,943 mi
11,174 km · 6,033 nm
14h 5m
estimated nonstop flight time
-10h
time difference · heading northwest
See live JSY→ONT fares Phone-only fares on this route — call free
Flight time details
6,943 miles nonstop takes roughly 14h 5m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 10-hour time set-back when reading arrival times on your ticket.
The two airports
- JSY — Syros Airport · Syros Island, Greece
- ONT — Ontario International Airport · Ontario, United States
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 JSY
- JMK · Mikonos Airport22 mi away
- PAS · Paros National Airport29 mi away
- JNX · Naxos Airport33 mi away
- MLO · Milos Airport57 mi away
Near ONT
- CCB · Cable Airport6 mi away
- CNO · Chino Airport6 mi away
- LAX · Los Angeles International Airport47 mi away
- RAL · Riverside Municipal Airport11 mi away
Frequently asked questions
How far is JSY from ONT?
The flight distance from Syros Island (JSY) to Ontario (ONT) is 6,943 miles (11,174 km, 6,033 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from JSY to ONT?
A nonstop flight takes about 14h 5m 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 time difference between Syros Island and Ontario?
Ontario is 10 hours behind Syros Island.
What is the cheapest way to fly from JSY to ONT?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on JSY–ONT that never appear on search engines, with no booking fees.