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ONT to SUS: distance & flight time
Ontario (Ontario International Airport) → Null (Spirit of St Louis Airport)
1,527 mi
2,458 km · 1,327 nm
3h 28m
estimated nonstop flight time
+2h
time difference · heading east
See live ONT→SUS fares Phone-only fares on this route — call free
Flight time details
1,527 miles nonstop takes roughly 3h 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
- ONT — Ontario International Airport · Ontario, United States
- SUS — Spirit of St Louis Airport · Null, 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 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 SUS
- STL · St Louis Lambert International Airport16 mi away
- ALN · St Louis Regional Airport36 mi away
- BLV · Scott AFB/Midamerica Airport45 mi away
- JEF · Jefferson City Memorial Airport81 mi away
Frequently asked questions
How far is ONT from SUS?
The flight distance from Ontario (ONT) to Null (SUS) is 1,527 miles (2,458 km, 1,327 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from ONT to SUS?
A nonstop flight takes about 3h 28m 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 Null?
Null is 2 hours ahead of Ontario.
What is the cheapest way to fly from ONT to SUS?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on ONT–SUS that never appear on search engines, with no booking fees.