SGD/SG
Find cheap flights to Ontario, California in 2025/2026 from S$1,039 This is the cheapest return flight found to Ontario, California from Singapore on FlightsFinder on December 4th 2025 at 16:27. This offer may no longer be available. Click the offer to check live prices & dates of travel.
Our Flight Finder compares the cheapest flights to Ontario, California from the most established flight comparison sites.
Fly to Ontario, California and visit sites like Planes of Fame Air Museum, Cucamonga-Guasti Regional Park, Jurupa Mountains Discovery Center & Yanks Air Museum.
1. Enter your search requirements for Ontario, California
2. Compare the best Ontario, California deals from top comparison engines
3. Book your Ontario, California flight at the cheapest price
These economy flights were found on FlightsFinder from Singapore to Ontario, California in the last few days. Prices subject to availability.
These economy flights were found on FlightsFinder from Singapore to Ontario, California in the last few days. Prices subject to availability.
According to our data, April is on average the cheapest time to book flights to Ontario, California.
You can get flights from S$1,039 return.
According to our data, November is on average the most expensive time to book flights to Ontario, California.
A return flight could set you back more than S$1,169.
Located in Southern California, Ontario is a vibrant city known for its diverse culture, rich history, and flourishing economy. With its proximity to major attractions such as the Ontario Mills shopping mall and the Toyota Arena, Ontario offers a perfect blend of urban excitement and natural beauty. The city boasts a range of outdoor recreational activities, including hiking in the nearby Mount Baldy and exploring the picturesque Cucamonga Wilderness. Whether you're a food enthusiast, outdoor adventurer, or history buff, Ontario has something to offer everyone, making it a truly dynamic destination worth exploring.
A good price for a flight to Ontario is S$935 - S$1143.
Popular airports near Ontario, California include Ontario International Airport (ONT), Los Angeles International Airport (LAX), and John Wayne Airport (SNA).
The flight to Ontario, California (ONT) is roughly 20 hours 2 minutes and 8,797 miles (14,157 kilometres) from Singapore, Singapore - Changi Airport (SIN).
The best way is to compare flights to Ontario, California from leading comparison sites using our search engine dashboard.
We have currently found no direct flights to Ontario, California.
Here is the average weather forecast in Ontario, California by month:
• Jan: 18°C
• Feb: 19°C
• Mar: 21°C
• Apr: 23°C
• May: 26°C
• Jun: 30°C
• Jul: 33°C
• Aug: 34°C
• Sep: 32°C
• Oct: 27°C
• Nov: 23°C
• Dec: 19°C
The main airport in Ontario, California is approximately 3 miles from the city center.
Typically, flights are cheapest to Ontario, California 2 months before departure.
Studies show flights to Ontario, California are typically cheaper on Tuesdays and Wednesdays.
10.6 °C
Fri, 5 Dec 2025
Average Temperature
18°C
Jan
19°C
Feb
21°C
Mar
23°C
Apr
26°C
May
30°C
Jun
33°C
Jul
34°C
Aug
32°C
Sep
27°C
Oct
23°C
Nov
19°C
Dec
Singapore, Singapore - Changi Airport (SIN) to Ontario, California (ONT)
Distance:
8,797 miles (14,157 kilometres)
Average flight time (direct 20 hours 2 minutes)
From Singapore (SIN), Singapore to Ontario, United States (ONT): S$1,039
Depart: 17 Apr 2026 · Return: 30 Apr 2026 Price found 04 Dec 2025, 16:27
Choose Site / Currency
USD/USA
GBP/UK
EUR/Ireland
AUD/Australia
CAD/Canada
INR/India
AED/United Arab Emirates
HKD/Hong Kong
ILS/Israel
MYR/Malaysia
NZD/New Zealand
PHP/Philippines
SAR/Saudi Arabia
ZAR/South Africa
IDR/Indonesia