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$363+ Cheap flights from Ontario (ONT) to Singapore

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 7/30. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SIN
Jul 5 — Jul 121
Sat 7/5
Sat 7/12
1 adult, Economy
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Cheap flight deals from Ontario to Singapore

Keep the following information in mind while searching for Ontario to Singapore flight deals. Data was last updated June 30, 2025.

Round-trip from

$710
(FlightHub)

One-way from

$363
(FlightHub)

Popular in

December

Cheapest in

September

Average price

$1,247
From Ontario to Singapore
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One-way flight from Ontario to Singapore
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Highest demand for flights based on searches. 12% potential increase in price ($142 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($50 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 30, 2025.

This FlightHub deal was found by Cheapflights users on 6/28. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/236:25 amONT - SIN
2 stops31h 35mKorean Air
Wed 8/61:10 amSIN - ONT
2 stops36h 37mKorean Air
Deal found 6/28$710
This Delta deal was found by Cheapflights users on 6/29. 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.
Tue 11/46:45 amONT - SIN
2 stops25h 25mDelta
Thu 11/1311:00 amSIN - ONT
2 stops22h 17mDelta
Deal found 6/29$735
This United Airlines deal was found by Cheapflights users on 6/28. 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.
Fri 9/56:00 amONT - SIN
1 stop21h 25mUnited Airlines
Sun 10/58:45 amSIN - ONT
1 stop23h 55mUnited Airlines
Deal found 6/28$784

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 June 30, 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

Wed 7/23

6:25 am-5:00 am

2 stops31h 35m

Singapore Changi

Wed 8/6

1:10 am-10:47 pm

2 stops36h 37m

$710

OntarioSingapore

ONT - SIN

ONTSIN

Ontario

Tue 11/4

6:45 am-12:10 am

2 stops25h 25m

Singapore Changi

Tue 11/11

11:00 am-11:46 pm

2 stops28h 46m

$735

OntarioSingapore

ONT - SIN

ONTSIN

Ontario

Fri 9/5

6:00 am-6:25 pm

1 stop21h 25m

Singapore Changi

Sun 10/5

8:45 am-5:40 pm

1 stop23h 55m

$784

OntarioSingapore

ONT - SIN

ONTSIN

Ontario

Wed 7/30

6:25 am-7:55 pm

2 stops46h 30m

$363

OntarioSingapore

ONT - SIN

ONTSIN

Ontario

Wed 7/16

6:00 am-5:00 am

2 stops32h 00m

$377

OntarioSingapore

ONT - SIN

ONTSIN

Ontario

Tue 7/15

6:00 am-12:20 am

2 stops27h 20m

$403

OntarioSingapore

ONT - SIN

ONTSIN

Ontario

Sat 8/30

6:00 am-6:25 pm

1 stop21h 25m

$421

OntarioSingapore

ONT - SIN

ONTSIN

Ontario

Fri 9/19

12:10 am-10:15 am

2 stops43h 05m

$501

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/28

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 $1,008). Flying from Ontario to Singapore in December is currently the most expensive (average of $1,674). 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 SG?

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 June 30, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ontario to Singapore as you normally would.

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 June 30, 2025.
See what other customers who have flown with Korean Air, Japan Airlines, and Delta from Ontario to Singapore have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Korean Air
8.4
Very good
1,101 reviews

Overall

8.4

Entertainment

8.2

Comfort

8.3

Food

8.1

Crew

8.7

Boarding

8.5

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Korean Air
8.4
Very good
1,101 reviews
Korean Air
8.4
Very good
1,101 reviews

Overall

8.4

Entertainment

8.2

Comfort

8.3

Food

8.1

Crew

8.7

Boarding

8.5

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Japan Airlines
8.3
Very good
1,504 reviews
Korean Air
8.4
Very good
1,101 reviews

Overall

8.4

Entertainment

8.2

Comfort

8.3

Food

8.1

Crew

8.7

Boarding

8.5

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Delta
8.0
Very good
7,969 reviews
Korean Air
8.4
Very good
1,101 reviews

Overall

8.4

Entertainment

8.2

Comfort

8.3

Food

8.1

Crew

8.7

Boarding

8.5

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
United Airlines
7.4
Good
8,852 reviews
Korean Air
8.4
Very good
1,101 reviews

Overall

8.4

Entertainment

8.2

Comfort

8.3

Food

8.1

Crew

8.7

Boarding

8.5

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.

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.

  • What airport do you fly from for flights from Ontario to Singapore?

    If you book a flight to Singapore from Ontario, you will be flying from Ontario, which is the city’s only airport. Ontario (ONT) is located 3.1 mi from the center of Ontario.

  • What are the cheapest airlines to fly from Ontario to Singapore one-way?

    One-way options have recently been found by users for as low as $363 on Korean Air. Other airlines that offer cheap prices include Delta from $377 and Japan Airlines from $402 one-way.

  • 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 $1,008). Flying from Ontario to Singapore in December is currently the most expensive (average of $1,674). 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

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Top 2 airlines flying from Ontario to Singapore

Discover the top 2 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 June 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$887Average$1,057FlexibilityNo cancel feeOn-time69%
China AirlinesCheapest$970Average$1,076FlexibilityNo cancel feeOn-time70%

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