Need help booking?
Unpublished phone-only deals available
ONT to XSP: distance & flight time
Ontario (Ontario International Airport) → Singapore (Seletar Airport)
8,799 mi
14,161 km · 7,647 nm
17h 43m
estimated nonstop flight time
+15h
time difference · heading northwest
See live ONT→XSP fares Phone-only fares on this route — call free
Flight time details
8,799 miles nonstop takes roughly 17h 43m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 15-hour time gain when reading arrival times on your ticket.
The two airports
- ONT — Ontario International Airport · Ontario, United States
- XSP — Seletar Airport · Singapore, Singapore
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 XSP
- SIN · Singapore Changi Airport10 mi away
- QPG · Paya Lebar Air Base5 mi away
- TGA · Tengah Air Base11 mi away
- JHB · Senai International Airport21 mi away
Frequently asked questions
How far is ONT from XSP?
The flight distance from Ontario (ONT) to Singapore (XSP) is 8,799 miles (14,161 km, 7,647 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from ONT to XSP?
A nonstop flight takes about 17h 43m 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 Singapore?
Singapore is 15 hours ahead of Ontario.
What is the cheapest way to fly from ONT to XSP?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on ONT–XSP that never appear on search engines, with no booking fees.