S$ 166+ 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 7-3. 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 Jan — 17 Jan1
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 December 2025.

Cheapest airline

Turkish Airlines

Good one-way deal

S$ 130 or less
On average, Turkish Airlines currently has the cheapest one-way flight from Ontario (avg. price of S$ 1,388).
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 December 2025.

Mon 26-107:30ONT - SIN
2 stops24h 40mDelta
Sun 1-222:30SIN - ONT
2 stops40h 14mDelta
Deal found 8-12S$ 820
Thu 22-115:30ONT - SIN
2 stops60h 55mDelta
Mon 2-222:30SIN - ONT
2 stops40h 14mDelta
Deal found 8-12S$ 828
Mon 16-207:30ONT - SIN
2 stops24h 40mDelta
Sun 22-222:30SIN - ONT
2 stops40h 07mDelta
Deal found 10-12S$ 839
Sat 14-207:30ONT - SIN
2 stops24h 40mDelta
Sun 22-222:30SIN - ONT
2 stops40h 07mDelta
Deal found 10-12S$ 872
Thu 16-407:00ONT - SIN
2 stops25h 40mKorean Air
Thu 30-422:30SIN - ONT
2 stops33h 46mKorean Air
Deal found 9-12S$ 880
Sun 15-207:30ONT - SIN
2 stops24h 40mDelta
Fri 20-210:40SIN - ONT
2 stops27h 57mDelta
Deal found 10-12S$ 903
Thu 2-406:00ONT - SIN
1 stop21h 35mUnited Airlines
Mon 6-409:00SIN - ONT
1 stop23h 47mUnited Airlines
Deal found 8-12S$ 1,016
Fri 1-506:00ONT - SIN
1 stop21h 35mUnited Airlines
Wed 13-511:05SIN - ONT
2 stops26h 47mUnited Airlines
Deal found 10-12S$ 1,027
Wed 15-406:00ONT - SIN
2 stops27h 45mUnited Airlines
Mon 27-409:00SIN - ONT
1 stop23h 47mUnited Airlines
Deal found 10-12S$ 1,031
Wed 3-607:00ONT - SIN
2 stops31h 00mKorean Air
Wed 17-607:30SIN - ONT
2 stops30h 10mKorean Air
Deal found 9-12S$ 1,048

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 December 2025. In the last 7 days, Cheapflights users made a total of 200,618 searches

Fly to

Singapore

Route

Depart

Return

Price

OntarioSingapore

ONT - SIN

ONTSIN

Ontario

Tue 27-1

07:30-00:10

2 stops24h 40m

Singapore Changi

Tue 3-2

22:30-22:44

2 stops40h 14m

S$ 820

OntarioSingapore

ONT - SIN

ONTSIN

Ontario

Sat 28-2

07:30-00:10

2 stops24h 40m

Singapore Changi

Fri 20-3

10:40-22:34

2 stops26h 54m

S$ 820

OntarioSingapore

ONT - SIN

ONTSIN

Ontario

Sun 1-3

07:30-00:10

2 stops24h 40m

Singapore Changi

Wed 18-3

10:40-22:34

2 stops26h 54m

S$ 820

OntarioSingapore

ONT - SIN

ONTSIN

Ontario

Mon 26-1

07:30-00:10

2 stops24h 40m

Singapore Changi

Mon 2-2

22:30-22:44

2 stops40h 14m

S$ 820

OntarioSingapore

ONT - SIN

ONTSIN

Ontario

Tue 10-2

07:30-00:10

2 stops24h 40m

Singapore Changi

Thu 26-2

22:30-23:49

2 stops41h 19m

S$ 820

OntarioSingapore

ONT - SIN

ONTSIN

Ontario

Tue 10-2

07:30-00:10

2 stops24h 40m

Singapore Changi

Mon 23-2

10:40-22:37

2 stops27h 57m

S$ 820

OntarioSingapore

ONT - SIN

ONTSIN

Ontario

Wed 28-1

07:30-00:10

2 stops24h 40m

Singapore Changi

Mon 2-2

22:30-23:58

2 stops41h 28m

S$ 820

OntarioSingapore

ONT - SIN

ONTSIN

Ontario

Sun 25-1

17:10-00:10

2 stops39h 00m

Singapore Changi

Tue 3-2

01:35-22:44

2 stops37h 09m

S$ 828

OntarioSingapore

ONT - SIN

ONTSIN

Ontario

Wed 8-4

06:00-19:55

2 stops46h 55m

Singapore Changi

Tue 28-4

07:30-22:40

2 stops30h 10m

S$ 839

OntarioSingapore

ONT - SIN

ONTSIN

Ontario

Mon 16-2

07:30-00:10

2 stops24h 40m

Singapore Changi

Tue 24-2

10:40-22:37

2 stops27h 57m

S$ 839

Flights are sorted by cheapest return flights first.

Deals found on 9-12

Showing 1-10 of 23 results
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, February is the cheapest month in which you can book a flight from Ontario (average of S$ 763). Flying from Ontario in December will prove the most costly (average of S$ 1,022). 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 (104 flights per day), Atlanta (74 flights per day) and Seattle (71 flights per day).

Denver Intl
Denver Intl
From S$ 123

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$ 123. Explore other affordable destinations below.

Denver Intl
Denver Intl
From S$ 123

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 December 2025.

  • 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$ 123 to Denver (prices may vary depending on the airline and departure time). On average, users have booked flights for S$ 195 to fly from Ontario.

  • What is the cheapest month to fly from Ontario?

    Currently, the cheapest month for flights from Ontario is February. The most expensive month for flights is December. 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$ 820 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.