S$ 149+ Cheap flights from Ontario

This is the cheapest return flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 23-4. 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.
ONT — SIN
3 Apr — 10 Apr1
1 adult
1 adult, Economy, 0 bags

What to know about flights from Ontario

Discover essential information about flights departing from Ontario, including flight schedules, destinations, airlines operating at the Ontario airport, and any specific guidelines or requirements for travellers. Please note that the information is based on the most recent updates available. Data last updated 4 March 2026.

Cheapest airline

Turkish Airlines

Good one-way deal

S$ 128 or less
On average, Turkish Airlines currently has the cheapest one-way flight from Ontario (avg. price of S$ 1,367).
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Price to beat on a one-way flight from Ontario.
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Find flights from Ontario

Enter your travel dates to find the best prices.

Cheapest flights from Ontario
Explore the most affordable flight options available from Ontario. Find the lowest fares based on data from user searches, with prices last updated on 4 March 2026.

Mon 24-807:00
ONT
-
SIN
2 stops31h 00m
Delta
Mon 7-901:25
SIN
-
ONT
2 stops36h 15m
Delta
Deal found 27-2S$ 812
Thu 20-807:00
ONT
-
SIN
2 stops31h 00m
Korean Air
Wed 16-901:25
SIN
-
ONT
2 stops36h 15m
Korean Air
Deal found 27-2S$ 818
Fri 28-806:00
ONT
-
SIN
2 stops32h 00m
Delta
Thu 10-907:30
SIN
-
ONT
2 stops31h 14m
Delta
Deal found 27-2S$ 858
Fri 28-806:00
ONT
-
SIN
2 stops32h 00m
Delta
Fri 11-907:30
SIN
-
ONT
2 stops30h 10m
Delta
Deal found 27-2S$ 904
Sun 19-407:00
ONT
-
SIN
2 stops25h 55m
Korean Air
Mon 27-407:30
SIN
-
ONT
2 stops24h 45m
Korean Air
Deal found 1-3S$ 910
Thu 20-819:13
ONT
-
SIN
1 stop20h 02m
United Airlines
Thu 17-908:45
SIN
-
ONT
1 stop18h 27m
United Airlines
Deal found 3-3S$ 922
Tue 21-411:05
ONT
-
SIN
1 stop28h 40m
United Airlines
Tue 28-409:00
SIN
-
ONT
2 stops26h 36m
United Airlines
Deal found 27-2S$ 927
Thu 30-406:00
ONT
-
SIN
1 stop21h 35m
United Airlines
Thu 14-520:35
SIN
-
ONT
2 stops63h 01m
United Airlines
Deal found 27-2S$ 943
Thu 2-406:00
ONT
-
SIN
1 stop21h 35m
Singapore Airlines
Thu 9-409:00
SIN
-
ONT
1 stop23h 47m
Singapore Airlines
Deal found 3-3S$ 947
Tue 14-407:00
ONT
-
SIN
2 stops25h 55m
Korean Air
Mon 27-407:30
SIN
-
ONT
2 stops24h 45m
Korean Air
Deal found 3-3S$ 974

Find flights from Ontario within your budget

 
Find flights departing from Ontario that match your specified budget. Filter results by price range, allowing you to narrow down options and find flights that fit within your financial constraints. Please note that the search results are based on data from user searches, with fares last updated on 4 March 2026. In the last 7 days, Cheapflights users made a total of 200,618 searches

Fly to

Route

Depart

Return

Price

OntarioSingapore

ONT - SIN

ONTSIN

Ontario

Thu 20-8

07:00-05:00

2 stops31h 00m

Singapore Changi

Wed 16-9

01:25-22:40

2 stops36h 15m

S$ 818

OntarioSingapore

ONT - SIN

ONTSIN

Ontario

Thu 20-8

13:44-06:15

1 stop25h 31m

Singapore Changi

Thu 17-9

11:05-22:58

2 stops26h 53m

S$ 933

OntarioSingapore

ONT - SIN

ONTSIN

Ontario

Thu 23-4

13:34-18:35

2 stops38h 01m

Singapore Changi

Thu 30-4

20:35-20:36

2 stops39h 01m

S$ 985

OntarioSingapore

ONT - SIN

ONTSIN

Ontario

Sun 3-5

06:00-18:35

1 stop21h 35m

Singapore Changi

Wed 13-5

20:35-09:41

1 stop28h 06m

S$ 1,039

OntarioSingapore

ONT - SIN

ONTSIN

Ontario

Thu 16-4

06:00-18:35

1 stop21h 35m

Singapore Changi

Thu 23-4

09:00-20:36

2 stops26h 36m

S$ 1,118

OntarioSingapore

ONT - SIN

ONTSIN

Ontario

Mon 4-5

07:00-23:55

2 stops25h 55m

Singapore Changi

Fri 10-7

22:00-09:01

2 stops50h 01m

S$ 1,296

OntarioSingapore

ONT - SIN

ONTSIN

Ontario

Thu 2-4

13:34-18:35

2 stops38h 01m

Singapore Changi

Thu 9-4

09:00-12:37

2 stops42h 37m

S$ 1,365

OntarioSingapore

ONT - SIN

ONTSIN

Ontario

Wed 27-5

06:00-18:35

1 stop21h 35m

Singapore Changi

Sun 31-5

08:45-17:56

1 stop24h 11m

S$ 1,490

OntarioSingapore

ONT - SIN

ONTSIN

Ontario

Tue 28-7

13:18-06:15

2 stops25h 57m

Singapore Changi

Fri 31-7

08:45-12:47

2 stops43h 02m

S$ 1,509

OntarioSingapore

ONT - SIN

ONTSIN

Ontario

Sat 18-4

00:10-12:35

1 stop21h 25m

Singapore Changi

Sun 3-5

11:05-18:00

2 stops21h 55m

S$ 1,510

Flights are sorted by cheapest return flights first.

Deals found on 27-2

Showing 1-10 of 21 resultsSorted by cheapest first
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Best time to book a flight from Ontario

Have a flexible travel schedule? Discover the best time to fly from Ontario with our price prediction graph.
Estimated return 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.

Travel insights for flights from Ontario

Get recent, data-driven insights about flights from Ontario including ideal travel times, pricing trends, and more.

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

Currently, September is the cheapest month in which you can book a flight from Ontario (average of S$ 733). Flying from Ontario in June will prove the most costly (average of S$ 983). There are multiple factors that influence the price of a flight so comparing airlines, departure airports and times can help keep costs down.

What are popular destinations to fly to from Ontario?

From Ontario you can expect to find greater availability for the following destinations: Dallas (115 flights per day), Seattle (85 flights per day) and Atlanta (63 flights per day).

Denver Intl
Denver Intl
From S$ 121

What is the cheapest place to fly to from Ontario?

The cheapest city to fly to from Ontario is Denver Intl, with prices starting at S$ 121. Explore other affordable destinations below.

Denver Intl
Denver Intl
From S$ 121

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Related info for your journey

Access useful and relevant information related to your journey from Ontario. This can include details such as airport transportation, visa requirements, travel insurance, luggage regulations, and any other information that can ensure a smooth and hassle-free travel experience. Please note that the information is based on general guidance and may need to be verified with official sources. Data last updated 4 March 2026.

  • What are the most popular destinations to fly to from Ontario?

    This month, the top selected destinations from Ontario are Dallas/Fort Worth Airport, Denver, Guadalajara. Throughout the year, Dallas/Fort Worth Airport, Denver, Guadalajara are some of the top choices made by users flying from Ontario.

  • What is the cheapest flight from Ontario to anywhere?

    Users have flown out of Ontario for as low as S$ 121 to Denver (prices may vary depending on the airline and departure time). On average, users have booked flights for S$ 192 to fly from Ontario.

  • What is the cheapest month to fly from Ontario?

    Currently, the cheapest month for flights from Ontario is September. The most expensive month for flights is June. The cheapest prices are shown above but prices will vary according to departure times, airlines, class and how early you book.

  • Where are the cheapest places to fly to from Ontario?

    View the cheapest flight destinations from Ontario:
    Fly from Ontario to Singapore from S$ 867 round trip

  • How does Cheapflights help users find flights from Ontario?

    900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight from Ontario today with Cheapflights!

  • Why should you use Cheapflights to find cheap flight tickets from Ontario?

    Cheapflights helps you find that perfect flight from Ontario by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

  • Can Cheapflights find flights from Ontario with no change fees?

    Need flexible booking options for your flight from Ontario ? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

  • Can Cheapflights notify me if prices for flights from Ontario become cheaper?

    Yes! Start tracking prices for flights from Ontario today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive the alerts.

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Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Ontario?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight from Ontario today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from Ontario?

Cheapflights helps you find that perfect flight from Ontario by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Ontario with no change fees?

Need flexible booking options for your flight from Ontario ? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Ontario become cheaper?

Yes! Start tracking prices for flights from Ontario today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive the alerts.

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