ONT - SIN

$322 Find Cheap Flights from Ontario to Singapore

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ontario to Singapore departing on 2/23. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Singapore

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Singapore, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Singapore, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$650
Delta
Mon 3/9Wed 3/18
ONT - SIN • 2 stops
Cheapest one-way
$322
Delta
Mon 2/23
ONT - SIN • 2 stops
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Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Ontario to Singapore (ONT-SIN)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to Singapore that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Ontario to Singapore

Mon, Mar 9 - Wed, Mar 18
Delta Logo
6:00 am - 12:10 am
ONT
-
SIN
27h 10m
2 stops
Delta Logo
10:40 am - 10:34 pm
SIN
-
ONT
26h 54m
2 stops
$650Delta
Wed, Mar 11 - Tue, Mar 17
Korean Air Logo
6:00 am - 12:10 am
ONT
-
SIN
27h 10m
2 stops
Korean Air Logo
1:35 am - 5:13 pm
SIN
-
ONT
30h 38m
2 stops
$655Korean Air
Sun, Mar 8 - Mon, Mar 16
Delta Logo
5:53 pm - 12:10 am
ONT
-
SIN
39h 17m
2 stops
Delta Logo
1:35 am - 10:34 pm
SIN
-
ONT
35h 59m
2 stops
$656Delta
Sat, Mar 14 - Mon, Mar 23
Delta Logo
5:53 pm - 8:25 pm
ONT
-
SIN
59h 32m
2 stops
Delta Logo
10:30 pm - 10:34 pm
SIN
-
ONT
39h 04m
2 stops
$782Delta
Sun, Feb 22 - Sun, Mar 22
Multiple Airlines Logo
6:37 pm - 8:00 am
ONT
-
SIN
21h 23m
1 stop
Multiple Airlines Logo
10:10 am - 5:41 pm
SIN
-
ONT
22h 31m
1 stop
$784Multiple Airlines
Wed, Feb 11 - Mon, Mar 16
United Airlines Logo
1:53 pm - 8:00 am
ONT
-
SIN
26h 07m
1 stop
United Airlines Logo
10:10 am - 5:41 pm
SIN
-
ONT
22h 31m
1 stop
$785United Airlines
Sun, Mar 1 - Fri, Mar 13
United Airlines Logo
5:00 am - 8:00 am
ONT
-
SIN
35h 00m
2 stops
United Airlines Logo
10:10 am - 10:57 pm
SIN
-
ONT
27h 47m
1 stop
$789United Airlines
Wed, Feb 11 - Sun, Mar 15
Multiple Airlines Logo
6:00 am - 8:15 pm
ONT
-
SIN
22h 15m
1 stop
Multiple Airlines Logo
10:20 pm - 12:18 pm
SIN
-
ONT
28h 58m
1 stop
$790Multiple Airlines
Sat, Mar 28 - Sun, Apr 19
United Airlines Logo
1:40 pm - 6:35 pm
ONT
-
SIN
37h 55m
1 stop
United Airlines Logo
9:00 am - 10:45 pm
SIN
-
ONT
28h 45m
1 stop
$791United Airlines
Sun, May 3 - Thu, May 7
United Airlines Logo
6:00 am - 6:35 pm
ONT
-
SIN
21h 35m
1 stop
United Airlines Logo
11:05 am - 10:52 pm
SIN
-
ONT
26h 47m
2 stops
$794United Airlines
Booking Insights

KAYAK's insights & trends for Ontario to Singapore flights

Get data-powered insights and trends into flights from Ontario to Singapore to help you find the cheapest flights, the best time to fly and much more.

What is the most popular layover airport when flying from Ontario to Singapore?

Percentage of 1-stop round-trip flights from Ontario to Singapore chosen by KAYAK users via each layover airport in the last 12 months (only includes trips with the same layover airport on both legs).

Taipei City (TPE) is the top choice – 67% of KAYAK users who clicked on 1-stop flights from Ontario to Singapore picked an itinerary connecting there.

What is the cheapest layover airport when flying from Ontario to Singapore?

Average round-trip price for 1-stop flights from Ontario to Singapore clicked by KAYAK users in the last 12 months (only includes trips with the same layover airport on both legs).

Flights via San Francisco (SFO) offer the most affordable fares, with an average round-trip price of $1,123.

Which layover airport offers the shortest total travel time from Ontario to Singapore?

Shortest average total travel time for 1-stop one-way flights from Ontario to Singapore via different layover airports, based on KAYAK user data from the last 12 months.

Consider flying via Manila (MNL) for the shortest journey. The average one-way travel time for flights connecting there is 19h 30m.

Which layover airport has the quickest connection when flying from Ontario to Singapore?

Average layover duration at different layover airports for 1-stop one-way flights from Ontario to Singapore, based on KAYAK user data from the last 12 months.

If you prefer a quick connection, Taipei City (TPE) often has the shortest layovers from Ontario to Singapore, with an average of 3h 00m.

Good to know

Low seasonAugust
Cheapest flight$322
Best time to beat the crowds with an average 25% drop in price.
Most popular time to fly with an average 33% increase in price.
Flight from Ontario to Singapore

When to book flights from Ontario to Singapore

Are your dates flexible? Find out the best times to travel from Ontario to Singapore based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Ontario to Singapore

  • What is the cheapest flight from Ontario to Singapore?

    In the last 3 days, the lowest price for a flight from Ontario to Singapore was $322 for a one-way ticket and $650 for a round-trip.

  • Do I need a passport to fly between Ontario and Singapore?

    A passport is required to fly from Ontario to Singapore.

  • Which aircraft models fly most regularly from Ontario to Singapore?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Ontario to Singapore?

    Star Alliance, and SkyTeam are the airline alliances operating flights between Ontario and Singapore, with Star Alliance being the most commonly used for this route.

  • Which is the best airline for flights from Ontario to Singapore, STARLUX Airlines or China Airlines?

    The two airlines most popular with KAYAK users for flights from Ontario to Singapore are STARLUX Airlines and China Airlines. With an average price for the route of $1,373 and an overall rating of 8.9, STARLUX Airlines is the most popular choice. China Airlines is also a great choice for the route, with an average price of $1,051 and an overall rating of 8.3.

  • How does KAYAK find such low prices on flights from Ontario to Singapore?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Ontario to Singapore.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ontario to Singapore?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Singapore from Ontario is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Ontario to Singapore?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Singapore with an airline and back to Ontario with another airline. Booking your flights between Ontario and SIN can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ontario to Singapore?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Singapore from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 3 airlines serving from Ontario to Singapore

 
See real verified KAYAK customer reviews for airlines flying from Ontario to Singapore. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Ontario to Singapore? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.9
STARLUX AirlinesOverall score based on 264 reviews
9.1Crew
8.9Boarding
8.8Comfort
8.6Food
8.8Entertainment
Airline reviews

Crew is very attentive. Another new airbus 350-900 plane. Very modern.

10.0 ExcellentRick, Jan 2026
TPE - SEA
Read more STARLUX Airlines reviews

Crew is very attentive. Another new airbus 350-900 plane. Very modern.

Passengers were confused and freaking out coz the flight information wasn’t showing on the board that was running with all the departing flights. B9 gate was still showing Cathay Pacific bound for HK 15:50 was on until 22:07. STARLUX staff cameater but didn’t let the passengers go in to pre departure area until 22:45 for the 23:30 boarding time

The aircraft is fairly new. The screen is big and it's great to enjoy movies on a long haul flight. However, the food quality , and drink and snack selections, have room for improvement.

Preboarding food selection is an excellent idea. On the other end I did know the choice. People in my area know the choice. It ends with I got my meal till most of them are half way to finish their meal.

Overall it’s good . However the food quality can be improved .

My luggage was forced open and broke the zipper. I received it in a huge STARLUX plastic bag. Unfortunately, I have a round trip ticket but might be my first and last with this airline

I went to the gate that showed on the flight board but they changed gates at the last minute and I missed my flight. I had to buy new ticket from EVA air to Manila and take 3 hour bus ride back to my home. Will never fly Starlux again!

Starlux was great service and awesome food and drinks👍🏼 will take starlux again for my next vacation👍🏼

Loved the boarding process. All airlines should board from the back to the front. Very efficient. Food was excellent, crew were great, seats were spacious and comfortable and the entertainment screen was the best I have seen.

Flight cancelled due to inclement weather yet rival airline EVA Air with the same route departed 2 hours later and landed safely while our flight was cancelled and rescheduled for 36 hours later.

Flight attendants. Food, entertainment and most of all, be on time.

Very bad. They don’t allow group people to sit together by blocking most of seats and opening only single seat during online checking in. . By doing so, they can rip off customers at the check-in counter by collecting extra money if we want to sit together in the same row.

We are glad to have used China Airlines for our trip. Continue the good service! Thank you!

The flat bed full lying position is not comfortable at all, this could be improved, it is at an awkward position which i dont have the same issues with other airlines business class.

The flight was uneventful and the crew was kind and professional. Really appreciate the option to order a vegan meal for the flight!

I love my Delta crew, they were so welcoming and helpful.

Sat next to a woman who had her period. Blood was on her seat and on the arm rest between us. I ended up having period blood on my jacket and shoes. Very gross!

Better organization of boarding procedures. Terrible leadership guiding people to gates.

They need to improve on how the plane lands cause it was not smooth at all.

I did not like how the plane landed. It was not smooth.

left on time, reasonable boarding process arrived early luggage came out quickly

Some flight attendants were great others were cranky. Seats were very tight and sitting on an aisle was very hard as the carts and people walking constantly bumped shoulder and arm.

It was great with United overall except for two things. 1) It was a 5-hour flight and we were with kids, so we were asking for extra snacks. They were extremely reticent to dole them out even though there wasn't any meal and the kids were starting to hit their limit towards the end. 2) Baggage didn't arrive until 80 minutes after we landed.

I’m so sorry, I can’t remember her name, I believe it was Dimpti. She was stellar, also a mature Asian flight attendant, lots of flowers in her hair, just as amazing! But literally the crew was AWESOME . Only downside is there weren’t any charging outlets. Maybe I needed to ask a flight attendant , but it would’ve been nice to have one easily accessible.

I boarded flight UA#1318 at Sacramento International Airport going back to Houston TX. The flight was scheduled at 5:10am. I was able to check in virtually using the United Airlines app. When I entered the airport, there was no one outside assisting with checked bags as it was for Delta Airlines. Immediately upon entering, there was a LONG, EXTREMELY LONG line to the kiosks to get boarding passes. I stand in line to get boarding passes then had to move to ANOTHER EXTREMELY LONG line to get my bags checked in. While standing in this line, we noticed an agent taking customers to 3 at a time to her station to check their bags in. Lucky for me, she called me back, checked my bags for me and I was on my way. I then encountered another long line at the TSA check and to avoid I ending up having to sign up for CLEAR to bypass it. So glad, I did.,...Both of my flights were great with no issues, butthe check in progress at Bush Airport was so much smoother. Check-in at SMF airport needs to be anaylzed and corrected. Do better United, I know you can....thanks

Pushed back only to get deplaned due to a tire damaged by ground crew. They did at least go pretty fast. The bathrooms should be banned under the Geneva convention. No room to even sit straight on the toilet. The under-seat entertainment units block what little leg room there is.

United airlines has the best customer experience from booking to arrival. I always fly United airlines. The mileage program is excellent

from SFO-> FRA flight, AVML meal was significantly less compared to regular meal, especially no Desert, no Bread, no sides.

This was an older airplane. The cabin was constantly warm to hot throughout the 10 hour flight and there were no vents to personalize air flow. Also since it was an older plane, the material and comfort of the chairs were very uncomfortable. I left my flight with major soreness on my tailbone.

Older aircraft, no meal, only food was for purchase. Not impressed United.

Everything you need to know for your flight from Ontario to Singapore

Information on your arrival and departure airports