ONT - SIN

$312 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 4/22. 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
Travelers love KAYAK
41 299 237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$635
Overall average: $958
Delta
Mon 5/4Thu 5/7
ONT - SIN • 2 stops
Cheapest one-way
$312
Typical prices: $541-$618
Delta
Wed 4/22
ONT - SIN • 2 stops
Top airlines
Delta
Cheapest • from $635 (round-trip)
STARLUX Airlines
Best reviews • 8.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Ontario and Singapore. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
San Francisco (SFO)
Cheapest • Avg $1,119 (round-trip)
Manila (MNL)
Shortest trip • 19h 30m (one-way)
Insights
Insights
Insights
Insights
When to travel
August
Cheapest • 24% price drop
December
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Singapore!
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, May 4 - Thu, May 7
Delta Logo
7:00 am - 11:55 pm
ONT
-
SIN
25h 55m
2 stops
Delta Logo
7:30 am - 10:34 pm
SIN
-
ONT
30h 04m
2 stops
$635Delta
Thu, Aug 20 - Wed, Sep 16
Korean Air Logo
7:00 am - 7:15 pm
ONT
-
SIN
45h 15m
2 stops
Korean Air Logo
1:25 am - 5:16 pm
SIN
-
ONT
30h 51m
2 stops
$641Korean Air
Mon, May 4 - Fri, May 8
Delta Logo
6:00 am - 11:55 pm
ONT
-
SIN
26h 55m
2 stops
Delta Logo
7:30 am - 5:10 pm
SIN
-
ONT
24h 40m
2 stops
$671Delta
Sun, May 3 - Tue, May 5
Korean Air Logo
7:00 am - 5:00 am
ONT
-
SIN
31h 00m
2 stops
Korean Air Logo
1:25 am - 5:15 pm
SIN
-
ONT
30h 50m
2 stops
$677Korean Air
Mon, Mar 9 - Tue, Apr 7
United Airlines Logo
6:37 pm - 7:00 am
ONT
-
SIN
21h 23m
1 stop
United Airlines Logo
9:00 am - 12:20 pm
SIN
-
ONT
18h 20m
1 stop
$722United Airlines
Wed, Apr 8 - Wed, Apr 15
United Airlines Logo
1:34 pm - 6:45 am
ONT
-
SIN
26h 11m
2 stops
United Airlines Logo
9:00 am - 8:36 pm
SIN
-
ONT
26h 36m
2 stops
$726United Airlines
Sun, Mar 8 - Wed, Apr 8
United Airlines Logo
6:37 pm - 8:15 pm
ONT
-
SIN
34h 38m
1 stop
United Airlines Logo
9:00 am - 12:20 pm
SIN
-
ONT
18h 20m
1 stop
$727United Airlines
Thu, Aug 20 - Thu, Sep 17
United Airlines Logo
6:00 am - 6:35 pm
ONT
-
SIN
21h 35m
1 stop
United Airlines Logo
11:05 am - 11:06 pm
SIN
-
ONT
27h 01m
2 stops
$731United Airlines
Sun, Mar 8 - Tue, Apr 7
United Airlines Logo
1:40 pm - 8:15 pm
ONT
-
SIN
39h 35m
1 stop
United Airlines Logo
8:35 pm - 12:38 pm
SIN
-
ONT
31h 03m
2 stops
$732United Airlines
Thu, Apr 30 - Thu, May 14
United Airlines Logo
6:00 am - 6:35 pm
ONT
-
SIN
21h 35m
1 stop
United Airlines Logo
11:05 am - 9:41 am
SIN
-
ONT
37h 36m
2 stops
$737United 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 cheapest month to fly from Ontario to Singapore?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Ontario to Singapore, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Ontario to Singapore is August, where tickets cost $801 (return) on average. On the other hand, the most expensive months are December and June, where the average cost of round-trip tickets is $1,426 and $1,349 respectively.

Good to know

Low seasonMay
Cheapest flight$312
Best time to beat the crowds with an average 9% drop in price.
Most popular time to fly with an average 36% 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 $312 for a one-way ticket and $635 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 $1,012 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 275 reviews
8.9Boarding
8.9Comfort
9.2Crew
8.7Food
8.8Entertainment
Airline reviews

Excellent. Airline was very clean, staff was excellent, very professional. Economy seats were still large and comfortable. Meals were included and with good options. We were given a blanket and pillow as well as a comfort kit including an eye mask, ear plugs, and tooth brush. Would highly recommend.

10.0 ExcellentAdam, Feb 2026
SEA - TPE
Read more STARLUX Airlines reviews

Excellent. Airline was very clean, staff was excellent, very professional. Economy seats were still large and comfortable. Meals were included and with good options. We were given a blanket and pillow as well as a comfort kit including an eye mask, ear plugs, and tooth brush. Would highly recommend.

Business Class is exceptional, from the lie flat seats to the wide range of food on board. Can’t wait for our next journey with Starlux!

Th tray was dirty when pulled it out. Still oily and food stains can clearly see last trip cleaner did not clean well. The toilet sink water did not drain quickly enough.

Majority of the movie entertainment loaded in the aircraft were quite old.

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

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.

We had turbulence ever 1/2 hr or so and the captains announcements were SOOOO LOUD

Women boarding passengers at the gate was absolutely rude and disrespectful of passengers. The flight attendant was absolutely delightful! Smiling and connected with the passengers. So happy. The seats are cramped and uncomfortable but I guess that’s just the way it is Communication regarding flight was excellent

it was a very short flight so my expectations were low.

Entertainment kept turning itself off. Gave up on watching a movie.

Very disappointing given gate agent behavior. Filed a formal complaint with United.

Crew was great (professional, attentive, prompt). Snacks for 4 hrs flight is deplorable.

Flight delayed. WiFi connectivity very poor if not existant. Last minute arrival forced me to run to catch my connection.

Terrible. No customer service, no food, no drinks on a 6 hour premier economy booking.

Check-in and in-flight staff were better than average. The seat was a fair size but too hard and not enough padding. The cushion/pillow provided is poor (thin and seems to be disposable ,it provides no effective cushioning or support). Food was OK-ish but no choice of inflight snacks and no easy place to get drinks other than water (I could ask for juice by intruding into the staff area at the back of the plane) Entertainment was very good actually. Overall better than I expected from a US-based airline (sorry!) but compared to ANA or Singapore it was so-so. (I live in Japan so they are my comparative airlines)

Terrible. Our first time back on United for 10 years, the seats in Polaris class are small and uncomfortable. They have squished too many people in to get more $$$. The staff are not friendly and not wanting to accommodate. I asked for two salads rather than a main meal and was advised no we wont do that. Then asked what I would like for breakfast and given something else anyway. I will not be flying United International anytime soon.

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

Information on your arrival and departure airports