$377 Cheap Flights from Ontario (ONT) to Singapore (SIN)

View $377 flight on Tue, Sep 1, 2026Opens in a new window

Popular airlines from Los Angeles - Ontario Intl. Airport (ONT) to Singapore Changi Airport (SIN)

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Cheap Flights from Ontario to Singapore (ONT-SIN)

Prices were available within the past 7 days and start at $377 for one-way flights and $734 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Mon, Mar 23 - Tue, Apr 7
ONT
Ontario
SIN
Singapore
$734 Roundtrip, found 1 day ago
$734
Roundtrip
found 1 day ago
Select Delta flight, departing Mon, Mar 23 from Ontario to Singapore, returning Tue, Apr 7, priced at $734 found 1 day ago
Korean Air
Tue, Feb 24 - Tue, Mar 3
ONT
Ontario
SIN
Singapore
$739 Roundtrip, found 9 hours ago
$739
Roundtrip
found 9 hours ago
Select Korean Air flight, departing Tue, Feb 24 from Ontario to Singapore, returning Tue, Mar 3, priced at $739 found 9 hours ago
Delta
Sat, Mar 28 - Tue, Apr 7
ONT
Ontario
SIN
Singapore
$739 Roundtrip, found 1 day ago
$739
Roundtrip
found 1 day ago
Select Delta flight, departing Sat, Mar 28 from Ontario to Singapore, returning Tue, Apr 7, priced at $739 found 1 day ago
Delta
Sat, Mar 28 - Mon, Apr 6
ONT
Ontario
SIN
Singapore
$746 Roundtrip, found 1 day ago
$746
Roundtrip
found 1 day ago
Select Delta flight, departing Sat, Mar 28 from Ontario to Singapore, returning Mon, Apr 6, priced at $746 found 1 day ago
Delta
Sat, Mar 21 - Tue, Mar 31
ONT
Ontario
SIN
Singapore
$746 Roundtrip, found 5 days ago
$746
Roundtrip
found 5 days ago
Select Delta flight, departing Sat, Mar 21 from Ontario to Singapore, returning Tue, Mar 31, priced at $746 found 5 days ago
Korean Air
Thu, Dec 4 - Tue, Dec 23
ONT
Ontario
SIN
Singapore
$748 Roundtrip, found 3 hours ago
$748
Roundtrip
found 3 hours ago
Select Korean Air flight, departing Thu, Dec 4 from Ontario to Singapore, returning Tue, Dec 23, priced at $748 found 3 hours ago
Korean Air
Thu, Dec 4 - Tue, Dec 23
ONT
Ontario
SIN
Singapore
$757 Roundtrip, found 3 hours ago
$757
Roundtrip
found 3 hours ago
Select Korean Air flight, departing Thu, Dec 4 from Ontario to Singapore, returning Tue, Dec 23, priced at $757 found 3 hours ago
United
Tue, Nov 11 - Wed, Nov 26
ONT
Ontario
SIN
Singapore
$783 Roundtrip, found 6 hours ago
$783
Roundtrip
found 6 hours ago
Select United flight, departing Tue, Nov 11 from Ontario to Singapore, returning Wed, Nov 26, priced at $783 found 6 hours ago
American Airlines
Sun, Nov 9 - Thu, Nov 13
ONT
Ontario
SIN
Singapore
$916 Roundtrip, found 1 day ago
$916
Roundtrip
found 1 day ago
Select American Airlines flight, departing Sun, Nov 9 from Ontario to Singapore, returning Thu, Nov 13, priced at $916 found 1 day ago
China Airlines
Fri, Mar 20 - Sat, Mar 28
ONT
Ontario
SIN
Singapore
$969 Roundtrip, found 2 hours ago
$969
Roundtrip
found 2 hours ago
Select China Airlines flight, departing Fri, Mar 20 from Ontario to Singapore, returning Sat, Mar 28, priced at $969 found 2 hours ago

Alternative airports near Singapore

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Senai Intl. JHB. Average driving time to city center is 48 minutes. Flights from $2,258
JHB
Senai Intl.
Average driving time to city center48 min
Flights from $2,258

Frequently asked questions

How much does a flight from Los Angeles - Ontario Intl. Airport (ONT) to Changi Airport (SIN) cost?
Secure a cheap one-way flight from $377 or cheap return flight from $734 from Los Angeles - Ontario Intl. Airport (ONT) to Changi Airport (SIN) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Los Angeles - Ontario Intl. Airport (ONT) to Changi Airport (SIN)?
March is the least expensive month to fly from ONT to SIN. Avoiding peak travel times is often the key to landing a great deal.
Which airlines fly direct from Los Angeles - Ontario Intl. Airport (ONT) to Changi Airport (SIN)?
There aren't any direct flights from Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Changi Airport (SIN). However, you'll find other airports offering nonstop flights. Start your journey at Los Angeles Intl. Airport (LAX) and head straight to Singapore without a layover.
What is the cheapest airline that flies from Los Angeles - Ontario Intl. Airport (ONT) to Changi Airport (SIN)?
Expedia's filter tool lets you easily compare different airlines, flight durations and fares all in one place. Select your preferences, then sort by "Price (lowest to highest)" to find out which carrier offers the cheapest ONT to SIN flight.
How many flights per day from Los Angeles - Ontario Intl. Airport (ONT) to Changi Airport (SIN)?
You'll have to take a flight with a layover when traveling from Los Angeles - Ontario Intl. Airport (ONT) to Changi Airport (SIN). Direct flights don't operate daily on this route. However, just filter your search to include one or two stops to discover the best option for your trip.
What day of the week has the most flights from ONT to SIN?
You'll generally find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can change from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Los Angeles - Ontario Intl. Airport (ONT) to Changi Airport (SIN)?
To land at Changi Airport (SIN) on time, pick a flight that leaves Los Angeles - Ontario Intl. Airport (ONT) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this hour.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Los Angeles - Ontario Intl. Airport (ONT) to Changi Airport (SIN) last-minute?
Last-minute fares from ONT to SIN are typically more expensive. To secure the cheapest rates, start searching for flights early. That said, if you're flexible with your travel dates, you may find a cheap ticket right before your journey.
Is it cheaper to book an ONT to SIN flight and hotel package?
Opting for an ONT to SIN flight and hotel package is generally cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your trip in one place. Select from our extensive range of hotels and then add activities, flights and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Los Angeles - Ontario Intl. Airport (ONT) to Changi Airport (SIN)?
Typically, it's possible to reschedule or cancel your ONT to SIN flight. However, for bookings made more than 24 hours ago, additional charges may apply. Check your airline's policies in your itinerary to see what changes are allowed and whether any costs are involved. You'll also find further details on our Customer Service portal.

Travel information

Origin airport
Los Angeles - Ontario Intl.
Destination airport
Changi
Airlines serving
Air Canada, Air France, American Airlines, British Airways, China Airlines, Delta, Etihad Airways, Japan Airlines, KLM, Korean Air, Qatar Airways, STARLUX Airlines, United
Roundtrip price
$733
Distance
8796 mi

Book with confidence

Ontario to Singapore Flights

The cheapest times to fly from Ontario to Singapore

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Ontario to Singapore are during the month of March. You can find some of the cheapest flights from Ontario to Singapore with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Ontario to Singapore

Sunday is one of the best days to book for cheap flights from Ontario to Singapore: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Ontario to Singapore

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Ontario to Singapore in 2025. You can also book with separate airlines for your outbound and return journeys, from $377 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Ontario to Singapore flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Ontario to Singapore airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Ontario to Singapore Flights

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*Available to One Key members.