Need help booking?
Unpublished phone-only deals available
ONT to SLD: distance & flight time
Ontario (Ontario International Airport) → Sliac (Sliač Airport)
6,133 mi
9,870 km · 5,329 nm
12h 29m
estimated nonstop flight time
+9h
time difference · heading northeast
See live ONT→SLD fares Phone-only fares on this route — call free
Flight time details
6,133 miles nonstop takes roughly 12h 29m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 9-hour time gain when reading arrival times on your ticket.
The two airports
- ONT — Ontario International Airport · Ontario, United States
- SLD — Sliač Airport · Sliac, Slovakia
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 ONT
- CCB · Cable Airport6 mi away
- CNO · Chino Airport6 mi away
- LAX · Los Angeles International Airport47 mi away
- RAL · Riverside Municipal Airport11 mi away
Near SLD
- ILZ · Žilina Airport47 mi away
- TAT · Poprad-Tatry Airport59 mi away
- PZY · Piešťany Airport60 mi away
- UHE · Kunovice Airport82 mi away
Frequently asked questions
How far is ONT from SLD?
The flight distance from Ontario (ONT) to Sliac (SLD) is 6,133 miles (9,870 km, 5,329 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from ONT to SLD?
A nonstop flight takes about 12h 29m 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 Ontario and Sliac?
Sliac is 9 hours ahead of Ontario.
What is the cheapest way to fly from ONT to SLD?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on ONT–SLD that never appear on search engines, with no booking fees.