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$341+ Cheap flights from Ontario (ONT) to Singapore (SIN)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/14. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SIN
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap flight deals from Ontario to Singapore

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Singapore (SIN). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 11, 2025.

Round-trip from

$684
(Korean Air)

One-way from

$341
(Delta)

Popular in

December

Cheapest in

August

Average price

$1,281
From Ontario to Singapore Changi
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One-way flight from Ontario to Singapore Changi
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Highest demand for flights based on searches. 6% potential increase in price ($82 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($34 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Ontario to Singapore

Cheapest flights from Ontario to Singapore
Explore the most affordable flight options available from Ontario to Singapore. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

This Delta deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/106:00 amONT - SIN
2 stops26h 40mDelta
Wed 9/177:30 amSIN - ONT
2 stops31h 12mDelta
Deal found 9/10$734
This Justfly.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/217:35 amONT - SIN
2 stops25h 05mKorean Air
Fri 10/247:30 amSIN - ONT
2 stops30h 11mKorean Air
Deal found 9/9$737
This Korean Air deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/67:35 amONT - SIN
2 stops30h 25mKorean Air
Thu 11/201:35 amSIN - ONT
2 stops31h 34mKorean Air
Deal found 9/10$739
This Delta deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/191:15 pmONT - SIN
2 stops48h 45mDelta
Thu 10/237:30 amSIN - ONT
2 stops30h 11mDelta
Deal found 9/9$740
This Delta deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/126:45 amONT - SIN
2 stops30h 15mDelta
Tue 12/910:40 amSIN - ONT
2 stops28h 07mDelta
Deal found 9/10$743
This Delta deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/136:45 amONT - SIN
2 stops25h 25mDelta
Thu 12/410:40 amSIN - ONT
2 stops28h 07mDelta
Deal found 9/10$752
This Trip.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/25:00 amONT - SIN
1 stop22h 15mUnited Airlines
Tue 11/1810:10 amSIN - ONT
1 stop18h 27mUnited Airlines
Deal found 9/10$757
This Delta deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/136:45 amONT - SIN
2 stops25h 25mDelta
Mon 12/810:40 amSIN - ONT
2 stops28h 07mDelta
Deal found 9/10$761
This United Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/136:36 pmONT - SIN
1 stop20h 39mUnited Airlines
Mon 10/208:45 amSIN - ONT
1 stop18h 28mUnited Airlines
Deal found 9/10$784
This United Airlines deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/75:05 amONT - SIN
2 stops34h 10mUnited Airlines
Tue 10/148:40 pmSIN - ONT
2 stops35h 43mUnited Airlines
Deal found 9/11$788
This United Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/119:36 amONT - SIN
1 stop41h 49mUnited Airlines
Tue 10/218:45 amSIN - ONT
1 stop18h 28mUnited Airlines
Deal found 9/10$789

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Singapore that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 11, 2025.
Use the filters below to find and compare flights from Ontario to Singapore that are best for you.

Fly from

Ontario

Fly to

Singapore

Route

Depart

Return

Price

OntarioSingapore

ONT - SIN

ONTSIN

Ontario

Tue 1/13

6:45 am-8:25 pm

2 stops45h 40m

Singapore Changi

Mon 1/19

10:30 pm-10:38 pm

2 stops40h 08m

$684

OntarioSingapore

ONT - SIN

ONTSIN

Ontario

Fri 12/5

6:40 am-5:00 am

2 stops30h 20m

Singapore Changi

Wed 12/24

1:35 am-5:08 pm

2 stops31h 33m

$739

OntarioSingapore

ONT - SIN

ONTSIN

Ontario

Sun 10/19

6:36 pm-6:15 am

1 stop20h 39m

Singapore Changi

Mon 10/27

10:10 am-5:34 pm

1 stop22h 24m

$784

OntarioSingapore

ONT - SIN

ONTSIN

Ontario

Tue 11/11

6:00 am-8:15 pm

1 stop22h 15m

Singapore Changi

Wed 11/19

10:10 am-12:37 pm

1 stop18h 27m

$784

OntarioSingapore

ONT - SIN

ONTSIN

Ontario

Sun 10/19

1:53 pm-6:15 am

1 stop25h 22m

Singapore Changi

Thu 10/23

8:45 am-5:40 pm

1 stop23h 55m

$784

OntarioSingapore

ONT - SIN

ONTSIN

Ontario

Sun 11/16

6:38 pm-8:00 am

1 stop21h 22m

Singapore Changi

Tue 11/25

10:10 am-12:37 pm

1 stop18h 27m

$784

OntarioSingapore

ONT - SIN

ONTSIN

Ontario

Sun 11/9

6:00 am-8:15 pm

1 stop22h 15m

Singapore Changi

Thu 11/20

10:10 am-12:37 pm

1 stop18h 27m

$784

OntarioSingapore

ONT - SIN

ONTSIN

Ontario

Sun 10/12

8:16 pm-6:15 am

1 stop18h 59m

Singapore Changi

Tue 10/21

8:45 am-12:13 pm

1 stop18h 28m

$784

OntarioSingapore

ONT - SIN

ONTSIN

Ontario

Sun 9/21

6:50 pm-6:15 am

1 stop20h 25m

Singapore Changi

Mon 10/13

8:45 am-5:40 pm

1 stop23h 55m

$784

OntarioSingapore

ONT - SIN

ONTSIN

Ontario

Thu 3/5

6:00 am-8:15 pm

1 stop22h 15m

Singapore Changi

Wed 3/18

10:10 am-6:00 pm

1 stop22h 50m

$784

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/11

Showing 1-10 of 23 results
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Best time to book a flight from Ontario to Singapore

Have a flexible travel schedule? Discover the best time to fly to Singapore from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

What is the cheapest month to book a flight from Ontario to Singapore?

Currently, October is the cheapest month in which you can book a flight from Ontario to Singapore (average of $1,002). Flying from Ontario to Singapore in December is currently the most expensive (average of $1,665). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ONT to SIN?

Find hourly flight availability from Ontario to Singapore. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 11, 2025.

A simple way to save on the total cost of your ticket is to fly from Ontario to Singapore in the morning. If you’re flexible enough to do this you can expect to save up to 23% on your trip compared to booking a flight at noon.

Reviews of airlines servicing Singapore

Get insights into the airlines that provide service to Singapore. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Singapore. Reviews last updated September 11, 2025.
Peruse reviews from past customers who have flown with STARLUX Airlines, China Airlines, and United Airlines from Ontario to Singapore to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
STARLUX Airlines
8.9
Very good
211 reviews

Boarding

9.0

Overall

8.9

Entertainment

8.9

Food

8.8

Crew

9.2

Comfort

8.9

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
STARLUX Airlines
8.9
Very good
211 reviews
STARLUX Airlines
8.9
Very good
211 reviews

Boarding

9.0

Overall

8.9

Entertainment

8.9

Food

8.8

Crew

9.2

Comfort

8.9

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
China Airlines
8.3
Very good
767 reviews
STARLUX Airlines
8.9
Very good
211 reviews

Boarding

9.0

Overall

8.9

Entertainment

8.9

Food

8.8

Crew

9.2

Comfort

8.9

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
United Airlines
7.4
Good
8,937 reviews
STARLUX Airlines
8.9
Very good
211 reviews

Boarding

9.0

Overall

8.9

Entertainment

8.9

Food

8.8

Crew

9.2

Comfort

8.9

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Singapore. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Ontario to Singapore?

    A quick flight from Ontario to Singapore can take about 20h 39m. Korean Air provides one of the quickest options available for as low as $784. There are 8791 mi between Ontario and Singapore. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from Ontario to Singapore round-trip?

    According to our current data, United Airlines ($801), China Airlines ($964), and STARLUX Airlines ($1,351) offers the cheapest pricing from Ontario to Singapore. You may be able to fly from Ontario to Singapore for 28% less than the average price by searching for these airlines.

  • Can I find deals for flights from Ontario to Singapore that include hotel bookings?

    Yes. In addition to deals on Ontario to Singapore flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Singapore?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Singapore.

  • Can I find deals for business class flights from Ontario to Singapore?

    Yes. Cheapflights offers flight deals from Ontario to Singapore by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ontario to Singapore?

    Currently, October is the cheapest month in which you can book a flight from Ontario to Singapore (average of $1,002). Flying from Ontario to Singapore in December is currently the most expensive (average of $1,665). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 3 airlines flying from Ontario to Singapore

Discover the top 3 airlines that operate flights from Ontario to Singapore. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$801Average$1,189FlexibilityNo cancel feeOn-time69%
China AirlinesCheapest$964Average$1,129FlexibilityNo cancel feeOn-time70%
STARLUX AirlinesCheapest$1,351Average$1,438FlexibilityNo cancel feeOn-timeN/A

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