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₹ 6,826+ Cheap flights from Ontario

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 29/1. 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 — DEL
28 Jan — 4 Feb1
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 29 December 2025.

Cheapest one-way flight

₹ 31,040

Cheapest airline

American Airlines

Most popular destination

London Heathrow (LHR)

Good round-trip deal

₹ 9,463 or less
The cheapest one-way flight from Ontario is currently to London Heathrow.
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On average, American Airlines currently has the cheapest one-way flight from Ontario (avg. price of ₹ 10,091).
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London Heathrow (LHR) is currently the most popular flight destination from Ontario (average return price of ₹ 37,264).
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Price to beat on a round-trip 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 29 December 2025.

Sat 24/115:30ONT - SEA
Nonstop3h 05mDelta
Tue 10/220:00SEA - ONT
Nonstop2h 44mDelta
Deal found 28/12₹ 10,688
Sat 24/107:30ONT - SEA
Nonstop3h 06mDelta
Thu 19/205:30SEA - ONT
1 stop6h 37mDelta
Deal found 28/12₹ 11,586
Sat 7/316:02ONT - SEA
Nonstop2h 50mAlaska Airlines
Tue 10/320:05SEA - ONT
Nonstop2h 39mAlaska Airlines
Deal found 28/12₹ 12,394
Sat 24/113:11ONT - SEA
1 stop5h 18mDelta
Tue 27/105:30SEA - ONT
1 stop6h 46mDelta
Deal found 28/12₹ 12,484
Mon 2/315:30ONT - SEA
Nonstop3h 03mDelta
Tue 10/311:25SEA - ONT
1 stop5h 03mDelta
Deal found 28/12₹ 13,382
Fri 23/108:55ONT - SEA
1 stop8h 55mSouthwest
Mon 26/109:30SEA - ONT
1 stop4h 50mSouthwest
Deal found 29/12₹ 13,562
Thu 29/116:03ONT - SEA
Nonstop2h 51mAlaska Airlines
Thu 29/121:20SEA - ONT
Nonstop2h 36mAlaska Airlines
Deal found 29/12₹ 13,741
Fri 23/115:20ONT - SEA
1 stop7h 45mSouthwest
Sat 24/111:40SEA - ONT
2 stops6h 55mSouthwest
Deal found 26/12₹ 14,011
Wed 22/410:39ONT - SEA
Nonstop2h 51mAlaska Airlines
Wed 29/419:50SEA - ONT
Nonstop2h 42mAlaska Airlines
Deal found 29/12₹ 14,101
Sat 7/316:02ONT - SEA
Nonstop2h 50mAlaska Airlines
Sun 15/320:56SEA - ONT
Nonstop2h 36mAlaska Airlines
Deal found 28/12₹ 14,191
Thu 5/316:02ONT - SEA
Nonstop2h 50mAlaska Airlines
Sun 15/320:56SEA - ONT
Nonstop2h 36mAlaska Airlines
Deal found 28/12₹ 14,280
Fri 24/419:59ONT - SEA
Nonstop2h 51mAlaska Airlines
Tue 28/407:05SEA - ONT
Nonstop2h 40mAlaska Airlines
Deal found 29/12₹ 14,999

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 29 December 2025. In the last 7 days, Cheapflights users made a total of 454,620 searches

Fly to

New Delhi

Route

Depart

Return

Price

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Tue 27/1

07:30-10:36

Nonstop3h 06m

Seattle/Tacoma Intl

Sat 31/1

20:07-22:51

Nonstop2h 44m

₹ 10,688

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Thu 12/2

15:30-18:33

Nonstop3h 03m

Seattle/Tacoma Intl

Tue 17/2

19:00-23:49

1 stop4h 49m

₹ 11,586

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Sat 24/1

07:30-10:36

Nonstop3h 06m

Seattle/Tacoma Intl

Tue 27/1

05:30-12:16

1 stop6h 46m

₹ 11,586

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Sat 7/3

16:02-18:52

Nonstop2h 50m

Seattle/Tacoma Intl

Wed 11/3

20:05-22:44

Nonstop2h 39m

₹ 12,394

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Sat 7/2

11:53-14:44

Nonstop2h 51m

Seattle/Tacoma Intl

Sun 8/2

08:15-10:59

Nonstop2h 44m

₹ 12,484

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Tue 3/3

16:02-18:52

Nonstop2h 50m

Seattle/Tacoma Intl

Thu 12/3

20:56-23:32

Nonstop2h 36m

₹ 12,484

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Sat 7/3

15:30-18:33

Nonstop3h 03m

Seattle/Tacoma Intl

Tue 10/3

08:30-11:17

Nonstop2h 47m

₹ 12,484

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Fri 23/1

16:03-18:54

Nonstop2h 51m

Seattle/Tacoma Intl

Tue 27/1

18:00-20:36

Nonstop2h 36m

₹ 12,484

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Tue 20/1

17:10-00:09

1 stop6h 59m

Seattle/Tacoma Intl

Tue 27/1

16:55-23:58

1 stop7h 03m

₹ 12,484

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Fri 23/1

17:10-00:09

1 stop6h 59m

Seattle/Tacoma Intl

Sun 25/1

05:00-12:16

1 stop7h 16m

₹ 12,484

Flights are sorted by cheapest return flights first.

Deals found on 28/12

Showing 1-10 of 60 results
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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, August is the cheapest month in which you can book a flight from Ontario (average of ₹ 58,558). Flying from Ontario in July will prove the most costly (average of ₹ 69,695). 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?

Ontario offers frequent flights to Dallas (114 flights per day), Seattle (102 flights per day) and Atlanta (101 flights per day).

Denver Intl
Denver Intl
From ₹ 9,463

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 ₹ 9,463. Explore other affordable destinations below.

Denver Intl
Denver Intl
From ₹ 9,463

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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 29 December 2025.

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

    For the current month, the most popular flights from Ontario are Dallas/Fort Worth Airport, Denver, Guadalajara. Dallas/Fort Worth Airport, Denver, Guadalajara are the most popular locations from Ontario year round.

  • What is the cheapest flight from Ontario to anywhere?

    Users have flown out of Ontario for as low as ₹ 9,463 to Denver (prices may vary depending on the airline and departure time). On average, users have booked flights for ₹ 9,911 to fly from Ontario.

  • What is the cheapest premium economy flight from Ontario?

    Options for some of the cheapest premium economy flights from Ontario we have found on Cheapflights are as follows:
    Fly from Ontario to Dallas/Fort Worth Airport starting at ₹ 185,603
    Fly from Ontario to Atlanta starting at ₹ 187,199

  • What is the cheapest month to fly from Ontario?

    August is currently the cheapest month to fly from Ontario. At this moment in time July is the most expensive month. These prices are determined by multiple factors and booking in advance can help keep costs down if your schedule is not as flexible.

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

    Here are some of the cheapest flight destinations from Ontario:
    Fly from Ontario to New Delhi from ₹ 74,006 round trip
    Fly from Ontario to Mumbai from ₹ 79,305 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 taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Ontario for you. Better yet — we are completely free to use.

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

    Yes, we can. To see specific flights from Ontario with no change fees, users can toggle flexible booking options after using the search form above to find flights.

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

    Of course! You can now track prices for flights from Ontario and get an alert from Cheapflights when they change. Click the bell icon next to the flight deals above and provide your email address to set up price 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 taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Ontario for you. Better yet — we are completely free to use.

Can Cheapflights find flights from Ontario with no change fees?

Yes, we can. To see specific flights from Ontario with no change fees, users can toggle flexible booking options after using the search form above to find flights.

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

Of course! You can now track prices for flights from Ontario and get an alert from Cheapflights when they change. Click the bell icon next to the flight deals above and provide your email address to set up price alerts.

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