S$ 151+ 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 14-4. 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
10 Apr — 17 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 11 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$ 1,364).
Search Deals
Price to beat on a one-way flight from Ontario.
Search Deals

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 11 March 2026.

Mon 7-907:00
ONT
-
SIN
2 stops31h 00m
Delta
Wed 30-922:00
SIN
-
ONT
2 stops34h 16m
Delta
Deal found 10-3S$ 808
Tue 12-506:45
ONT
-
SIN
2 stops31h 15m
Korean Air
Mon 1-607:30
SIN
-
ONT
2 stops24h 38m
Korean Air
Deal found 10-3S$ 815
Sun 6-914:00
ONT
-
SIN
2 stops48h 00m
Delta
Wed 30-907:30
SIN
-
ONT
2 stops30h 10m
Delta
Deal found 10-3S$ 816
Mon 3-817:05
ONT
-
SIN
2 stops44h 55m
Delta
Mon 31-822:00
SIN
-
ONT
2 stops50h 01m
Delta
Deal found 10-3S$ 822
Sun 16-807:00
ONT
-
SIN
2 stops31h 00m
Delta
Wed 2-907:30
SIN
-
ONT
2 stops30h 10m
Delta
Deal found 9-3S$ 872
Fri 4-907:00
ONT
-
SIN
2 stops31h 00m
Korean Air
Wed 23-901:25
SIN
-
ONT
2 stops30h 51m
Korean Air
Deal found 10-3S$ 878
Mon 3-813:00
ONT
-
SIN
2 stops49h 00m
Delta
Fri 28-807:30
SIN
-
ONT
2 stops31h 14m
Delta
Deal found 10-3S$ 880
Thu 20-807:00
ONT
-
SIN
2 stops31h 00m
Delta
Thu 17-907:30
SIN
-
ONT
2 stops31h 14m
Delta
Deal found 9-3S$ 920
Sun 16-807:00
ONT
-
SIN
2 stops31h 00m
Delta
Fri 28-807:30
SIN
-
ONT
2 stops31h 14m
Delta
Deal found 9-3S$ 936
Fri 4-907:00
ONT
-
SIN
2 stops31h 00m
Korean Air
Fri 25-901:25
SIN
-
ONT
2 stops36h 15m
Korean Air
Deal found 10-3S$ 942
Wed 6-507:00
ONT
-
SIN
2 stops31h 00m
Delta
Mon 11-501:25
SIN
-
ONT
2 stops30h 45m
Delta
Deal found 6-3S$ 964
Thu 7-506:45
ONT
-
SIN
2 stops26h 10m
Korean Air
Mon 8-607:30
SIN
-
ONT
2 stops24h 46m
Korean Air
Deal found 6-3S$ 970

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 11 March 2026. In the last 7 days, Cheapflights users made a total of 200,618 searches

Fly to

Route

Depart

Return

Price

Cheapest return flight

OntarioSingapore

ONT - SIN

ONTSIN

Ontario

Thu 23-4

06:00-18:35

1 stop21h 35m

Singapore Changi

Thu 30-4

09:00-17:52

1 stop23h 52m

S$ 981

OntarioSingapore

ONT - SIN

ONTSIN

Ontario

Mon 20-4

05:10-06:45

2 stops34h 35m

Singapore Changi

Mon 27-4

20:35-09:56

1 stop28h 21m

S$ 988

OntarioSingapore

ONT - SIN

ONTSIN

Ontario

Fri 8-5

06:45-05:00

2 stops31h 15m

Singapore Changi

Wed 10-6

07:30-17:16

2 stops24h 46m

S$ 1,006

OntarioSingapore

ONT - SIN

ONTSIN

Ontario

Thu 7-5

06:00-18:35

1 stop21h 35m

Singapore Changi

Sat 6-6

08:45-22:50

1 stop29h 05m

S$ 1,040

OntarioSingapore

ONT - SIN

ONTSIN

Ontario

Mon 4-5

06:00-18:35

1 stop21h 35m

Singapore Changi

Thu 7-5

20:35-09:41

1 stop28h 06m

S$ 1,045
Fastest return journey

OntarioSingapore

ONT - SIN

ONTSIN

Ontario

Sun 3-5

18:59-06:45

1 stop20h 46m

Singapore Changi

Sun 17-5

09:00-12:22

1 stop18h 22m

S$ 1,088

OntarioSingapore

ONT - SIN

ONTSIN

Ontario

Tue 5-5

06:00-05:00

2 stops32h 00m

Singapore Changi

Wed 13-5

07:30-17:10

2 stops24h 40m

S$ 1,104

OntarioSingapore

ONT - SIN

ONTSIN

Ontario

Sun 10-5

06:45-05:00

2 stops31h 15m

Singapore Changi

Thu 4-6

07:30-17:08

2 stops24h 38m

S$ 1,167

OntarioSingapore

ONT - SIN

ONTSIN

Ontario

Fri 24-4

07:00-05:00

2 stops31h 00m

Singapore Changi

Sat 2-5

07:30-22:37

2 stops30h 07m

S$ 1,254

OntarioSingapore

ONT - SIN

ONTSIN

Ontario

Thu 13-8

00:45-12:35

1 stop20h 50m

Singapore Changi

Wed 26-8

13:45-18:40

1 stop19h 55m

S$ 1,335

Flights are sorted by cheapest return flights first.

Deals found on 8-3

Showing 1-10 of 23 resultsSorted by cheapest first
1
2
3

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, April is the cheapest month in which you can book a flight from Ontario (average of S$ 729). Flying from Ontario in June will prove the most costly (average of S$ 979). 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 (108 flights per day), Seattle (90 flights per day) and Phoenix (85 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

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.

Direct flights from California

Book a direct flight from one of these other cities located in California.
Direct flights from Los Angeles
Direct flights from San Francisco
Direct flights from San Diego
Direct flights from San Jose
Direct flights from Fresno

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 11 March 2026.

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

    This month, the top selected destinations from Ontario are Las Vegas, Dallas/Fort Worth Airport, Denver. Throughout the year, Las Vegas, Dallas/Fort Worth Airport, Denver 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$ 191 to fly from Ontario.

  • What is the cheapest month to fly from Ontario?

    Currently, the cheapest month for flights from Ontario is April. 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$ 815 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.

See more FAQs

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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book With Flexibility

Our users can plan ahead with confidence and find flights with no change fees.

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.