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PRG to ONT: distance & flight time
Prague (Václav Havel Airport Prague) → Ontario (Ontario International Airport)
5,921 mi
9,529 km · 5,145 nm
12h 5m
estimated nonstop flight time
-9h
time difference · heading northwest
See live PRG→ONT fares Phone-only fares on this route — call free
Flight time details
5,921 miles nonstop takes roughly 12h 5m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 9-hour time set-back when reading arrival times on your ticket.
The two airports
- PRG — Václav Havel Airport Prague · Prague, Czech Republic
- 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 PRG
- VOD · Vodochody Airport10 mi away
- KLV · Karlovy Vary International Airport60 mi away
- PED · Pardubice Airport66 mi away
- DRS · Dresden Airport75 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 PRG from ONT?
The flight distance from Prague (PRG) to Ontario (ONT) is 5,921 miles (9,529 km, 5,145 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from PRG to ONT?
A nonstop flight takes about 12h 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 Prague and Ontario?
Ontario is 9 hours behind Prague.
What is the cheapest way to fly from PRG to ONT?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on PRG–ONT that never appear on search engines, with no booking fees.