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ONT to PSS: distance & flight time
Ontario (Ontario International Airport) → Posadas (Libertador Gral D Jose De San Martin Airport)
5,854 mi
9,421 km · 5,087 nm
11h 57m
estimated nonstop flight time
+4h
time difference · heading southeast
See live ONT→PSS fares Phone-only fares on this route — call free
Flight time details
5,854 miles nonstop takes roughly 11h 57m gate to gate, flying southeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 4-hour time gain when reading arrival times on your ticket.
The two airports
- ONT — Ontario International Airport · Ontario, United States
- PSS — Libertador Gral D Jose De San Martin Airport · Posadas, Argentina
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 PSS
- ENO · Encarnación Airport14 mi away
- AYO · Juan De Ayolas Airport54 mi away
- SRA · Santa Rosa Airport96 mi away
- ELO · El Dorado Airport110 mi away
Frequently asked questions
How far is ONT from PSS?
The flight distance from Ontario (ONT) to Posadas (PSS) is 5,854 miles (9,421 km, 5,087 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from ONT to PSS?
A nonstop flight takes about 11h 57m 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 ONT to PSS?
Nonstop service on ONT–PSS 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 11h 57m nonstop estimate.
What is the time difference between Ontario and Posadas?
Posadas is 4 hours ahead of Ontario.
What is the cheapest way to fly from ONT to PSS?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on ONT–PSS that never appear on search engines, with no booking fees.
Why are some ONT to PSS fares phone-only?
Consolidator contracts let us sell certain ONT–PSS 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.