What are the cheapest airlines to fly from California to Region of Ontario one-way?

C$ 88 is the cheapest one-way deal found within the past few days, from Air Canada. You may also be able to find cheap deals on United Airlines and Porter Airlines, with prices starting from C$ 89 and C$ 94, respectively.

How far in advance should I book a flight from California to Region of Ontario?

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 47 days in advance, which can save you up to 68% on flights from California to Region of Ontario compared to booking the week you need them. Waiting 47 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at C$ 368. For sooner than that we have options available in the next 3 days from C$ 658.

What is the cheapest month to fly from California to Region of Ontario?

Flights from California to Region of Ontario lean towards being more expensive in December. Prices are generally better when you fly from California to Region of Ontario in September, with the cheapest ticket starting at C$ 169.

Can I find deals for flights from California to Ontario that include hotel bookings?

Yes. In addition to deals on California to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from California to Ontario?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from California to Ontario.

Can I find deals for business class flights from California to Ontario?

Yes. Cheapflights offers flight deals from California to Ontario by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

C$ 88+ Flights from California to Ontario

Cheap flight deals from California to Ontario

Round-trip from	C$ 176
One-way from	C$ 88
Popular in	December
Cheapest in	September
Average price	C$ 430
Good round-trip deal	C$ 168 or less
Good one-way deal	C$ 183 or less

Porter Airlines
10/4-15/4
Nonstop
9h 21m total
California to Ontario

Search Deals

11/3
1 total stop
13h 00m total
California to Ontario

Search Deals

Highest demand for flights based on searches. 6% potential increase in price (C$ 47 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (C$ 18 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in February 2025

Search Deals

Price to beat on a round-trip flight from California to Ontario.

Search Deals

Price to beat on a one-way flight from California to Ontario.

Search Deals

Find flight deals from California to Ontario

Cheapest flights from California to Ontario
Explore the most affordable flight options available from California to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 20 February 2025.

Thu 10/411:25 p.m.LAS - YYZ

Nonstop4h 18mMultiple Airlines

Tue 15/47:25 p.m.YYZ - LAS

Nonstop5h 03mMultiple Airlines

Deal found 20/2C$ 176

Wed 16/411:25 p.m.LAS - YYZ

Nonstop4h 18mWestJet

Mon 21/46:30 a.m.YYZ - LAS

1 stop9h 02mWestJet

Deal found 19/2C$ 213

Fri 21/310:35 p.m.LAS - YYZ

Nonstop4h 20mPorter Airlines

Mon 31/32:00 p.m.YYZ - LAS

1 stop9h 40mPorter Airlines

Deal found 20/2C$ 214

Tue 15/45:25 p.m.LAX - YYZ

1 stop10h 18mMultiple Airlines

Tue 22/48:00 p.m.YYZ - LAX

1 stop21h 11mMultiple Airlines

Deal found 19/2C$ 241

Mon 14/49:41 p.m.ONT - YYZ

1 stop30h 02mMultiple Airlines

Tue 22/48:00 p.m.YYZ - ONT

1 stop16h 53mMultiple Airlines

Deal found 19/2C$ 249

Tue 15/47:02 p.m.SFO - YYZ

1 stop8h 41mMultiple Airlines

Tue 22/48:00 p.m.YYZ - SFO

1 stop14h 45mMultiple Airlines

Deal found 20/2C$ 249

Tue 1/47:28 p.m.SJC - YYZ

1 stop7h 27mMultiple Airlines

Tue 8/48:00 p.m.YYZ - SJC

1 stop23h 31mMultiple Airlines

Deal found 19/2C$ 250

Wed 2/48:07 p.m.SAN - YYZ

1 stop7h 36mMultiple Airlines

Wed 9/48:00 p.m.YYZ - SAN

1 stop26h 16mMultiple Airlines

Deal found 20/2C$ 254

Tue 27/57:00 a.m.LAX - YYZ

1 stop10h 54mWestJet

Sat 7/66:45 a.m.YYZ - LAX

2 stops13h 32mWestJet

Deal found 20/2C$ 261

Mon 17/312:59 a.m.LAS - YYZ

1 stop10h 21mUnited Airlines

Wed 26/38:00 a.m.YYZ - LAS

2 stops12h 12mUnited Airlines

Deal found 20/2C$ 270

Sat 17/511:40 a.m.LAX - YUL

1 stop10h 03mWestJet

Sat 31/57:00 a.m.YUL - LAX

1 stop10h 12mWestJet

Deal found 19/2C$ 325

Sat 5/47:00 a.m.LAX - YYZ

Nonstop4h 48mPorter Airlines

Fri 11/45:30 p.m.YYZ - LAX

Nonstop5h 35mPorter Airlines

Deal found 20/2C$ 328

Best flights from California to Ontario
Discover carefully curated flight deals from California to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 20 February 2025.

Thu 10/411:25 p.m.LAS - YYZ

Nonstop4h 18mMultiple Airlines

Tue 15/47:25 p.m.YYZ - LAS

Nonstop5h 03mMultiple Airlines

Deal found 20/2C$ 176

Wed 16/411:25 p.m.LAS - YYZ

Nonstop4h 18mWestJet

Mon 21/46:30 a.m.YYZ - LAS

1 stop9h 02mWestJet

Deal found 19/2C$ 213

Fri 21/310:35 p.m.LAS - YYZ

Nonstop4h 20mPorter Airlines

Mon 31/32:00 p.m.YYZ - LAS

1 stop9h 40mPorter Airlines

Deal found 20/2C$ 214

Mon 17/312:59 a.m.LAS - YYZ

1 stop10h 21mUnited Airlines

Wed 26/38:00 a.m.YYZ - LAS

2 stops12h 12mUnited Airlines

Deal found 20/2C$ 270

Wed 30/42:30 p.m.LAS - YYZ

Nonstop4h 17mAir Transat

Wed 7/57:00 a.m.YYZ - LAS

Nonstop4h 53mAir Transat

Deal found 19/2C$ 320

Thu 6/310:15 a.m.SFO - YYZ

1 stop17h 25mFlair Airlines

Wed 12/38:10 p.m.YYZ - SFO

1 stop16h 20mFlair Airlines

Deal found 19/2C$ 357

Sun 23/312:50 a.m.LAS - YYZ

1 stop6h 08mAir Canada

Tue 1/42:45 p.m.YYZ - LAS

1 stop7h 24mAir Canada

Deal found 20/2C$ 379

Wed 12/312:20 a.m.LAX - YYZ

1 stop9h 10mAmerican Airlines

Sun 16/36:15 a.m.YYZ - LAX

1 stop7h 35mAmerican Airlines

Deal found 20/2C$ 436

Mon 28/412:35 a.m.LAS - YYZ

1 stop8h 38mDelta

Wed 7/53:59 p.m.YYZ - LAS

1 stop8h 31mDelta

Deal found 19/2C$ 452

Tue 15/45:25 p.m.LAX - YYZ

1 stop10h 18mMultiple Airlines

Tue 22/48:00 p.m.YYZ - LAX

1 stop21h 11mMultiple Airlines

Deal found 20/2C$ 244

Fri 21/36:59 p.m.LAS - YYZ

2 stops16h 56mAlaska Airlines

Tue 1/44:30 p.m.YYZ - LAS

2 stops19h 06mAlaska Airlines

Deal found 19/2C$ 501

Tue 27/57:00 a.m.LAX - YYZ

1 stop10h 54mWestJet

Sat 7/66:45 a.m.YYZ - LAX

2 stops13h 32mWestJet

Deal found 20/2C$ 261

Direct flights from California to Ontario
Explore direct flight options from California to Ontario based on user searches, and compare prices and availability for your desired travel dates. Data last updated 20 February 2025.

Wed 16/411:25 p.m.LAS - YYZ

Nonstop4h 18mMultiple Airlines

Sun 27/47:25 p.m.YYZ - LAS

Nonstop5h 03mMultiple Airlines

Deal found 20/2C$ 168

Thu 10/411:25 p.m.LAS - YYZ

Nonstop4h 18mWestJet

Tue 15/48:00 p.m.YYZ - LAS

Nonstop5h 13mWestJet

Deal found 20/2C$ 179

Fri 21/310:35 p.m.LAS - YYZ

Nonstop4h 20mPorter Airlines

Wed 26/37:25 p.m.YYZ - LAS

Nonstop5h 05mPorter Airlines

Deal found 20/2C$ 195

Wed 26/211:30 p.m.LAS - YYZ

Nonstop4h 05mAir Canada

Thu 27/28:15 p.m.YYZ - LAS

Nonstop4h 51mAir Canada

Deal found 20/2C$ 267

Tue 27/511:10 p.m.LAX - YYZ

Nonstop4h 50mWestJet

Sat 7/67:45 p.m.YYZ - LAX

Nonstop5h 25mWestJet

Deal found 20/2C$ 281

Sat 5/47:00 a.m.LAX - YYZ

Nonstop4h 48mPorter Airlines

Sat 12/45:30 p.m.YYZ - LAX

Nonstop5h 35mPorter Airlines

Deal found 19/2C$ 310

Fri 6/611:10 p.m.LAX - YYZ

Nonstop4h 50mMultiple Airlines

Wed 11/612:45 p.m.YYZ - LAX

Nonstop5h 20mMultiple Airlines

Deal found 20/2C$ 334

Wed 2/42:05 p.m.SAN - YYZ

Nonstop4h 45mPorter Airlines

Mon 7/410:20 a.m.YYZ - SAN

Nonstop5h 45mPorter Airlines

Deal found 20/2C$ 361

Mon 24/32:05 p.m.SAN - YYZ

Nonstop4h 45mMultiple Airlines

Wed 26/310:20 a.m.YYZ - SAN

Nonstop5h 45mMultiple Airlines

Deal found 20/2C$ 381

Sat 7/64:00 p.m.SFO - YYZ

Nonstop4h 59mPorter Airlines

Sat 14/69:45 a.m.YYZ - SFO

Nonstop5h 38mPorter Airlines

Deal found 19/2C$ 381

Tue 25/312:40 p.m.SAN - YYZ

Nonstop4h 50mUnited Airlines

Thu 27/39:25 a.m.YYZ - SAN

Nonstop5h 38mUnited Airlines

Deal found 20/2C$ 419

Sat 22/310:55 p.m.LAX - YYZ

Nonstop4h 41mUnited Airlines

Sun 30/34:00 p.m.YYZ - LAX

Nonstop5h 24mUnited Airlines

Deal found 19/2C$ 432

Last-minute flights from California to Ontario
Discover last-minute flight deals from California to Ontario. Data last updated 20 February 2025 and is based on user searches.

Tue 25/210:40 a.m.LAX - YYZ

1 stop16h 15mMultiple Airlines

Wed 26/27:25 p.m.YYZ - LAX

1 stop17h 15mMultiple Airlines

Deal found 19/2C$ 276

Tue 25/23:30 p.m.SFO - YYZ

1 stop11h 25mMultiple Airlines

Tue 4/36:30 a.m.YYZ - SFO

1 stop9h 36mMultiple Airlines

Deal found 20/2C$ 420

Wed 26/23:50 p.m.LAX - YTZ

2 stops26h 40mMultiple Airlines

Mon 3/34:10 p.m.YTZ - LAX

2 stops32h 22mMultiple Airlines

Deal found 19/2C$ 381

Thu 27/28:25 p.m.LAS - YYZ

1 stop13h 28mMultiple Airlines

Mon 3/37:25 p.m.YYZ - LAS

Nonstop5h 05mMultiple Airlines

Deal found 19/2C$ 307

Thu 27/28:25 p.m.LAS - YYZ

1 stop13h 28mWestJet

Mon 3/36:30 a.m.YYZ - LAS

1 stop9h 02mWestJet

Deal found 20/2C$ 338

Thu 27/22:48 p.m.SAN - YYZ

2 stops19h 05mMultiple Airlines

Fri 14/37:25 p.m.YYZ - SAN

1 stop26h 52mMultiple Airlines

Deal found 20/2C$ 369

Thu 27/21:25 p.m.LAX - YUL

1 stop8h 10mMultiple Airlines

Thu 13/36:45 a.m.YUL - LAX

2 stops15h 15mMultiple Airlines

Deal found 20/2C$ 396

Thu 27/27:35 a.m.LAX - YUL

1 stop8h 30mPorter Airlines

Thu 20/36:45 a.m.YUL - LAX

1 stop8h 40mPorter Airlines

Deal found 20/2C$ 425

Fri 28/212:50 a.m.LAS - YYZ

1 stop8h 35mUnited Airlines

Tue 4/37:15 a.m.YYZ - LAS

1 stop8h 56mUnited Airlines

Deal found 19/2C$ 303

Fri 28/210:30 a.m.LAX - YYZ

1 stop10h 00mWestJet

Tue 4/310:00 a.m.YYZ - LAX

1 stop9h 54mWestJet

Deal found 19/2C$ 411

Fri 28/27:35 a.m.LAX - YYZ

Nonstop4h 51mPorter Airlines

Wed 16/49:45 a.m.YYZ - LAX

Nonstop5h 35mPorter Airlines

Deal found 19/2C$ 474

Sun 2/39:18 p.m.SJC - YYZ

1 stop29h 37mMultiple Airlines

Tue 11/37:25 p.m.YYZ - SJC

1 stop24h 09mMultiple Airlines

Deal found 20/2C$ 339

One-way flights from California to Ontario
Search for one-way flight options from California to Ontario. Find affordable one-way fares based on user searches. Data last updated 20 February 2025.

Tue 11/32:43 p.m.ONT - YYZ

1 stop13h 00mMultiple Airlines

Deal found 19/2C$ 88

Tue 11/35:34 p.m.SJC - YYZ

1 stop10h 09mMultiple Airlines

Deal found 19/2C$ 88

Wed 26/21:42 p.m.LAS - YYZ

1 stop5h 55mAir Canada

Deal found 20/2C$ 88

Tue 15/412:59 a.m.LAS - YYZ

1 stop10h 11mUnited Airlines

Deal found 19/2C$ 89

Tue 22/410:35 p.m.LAS - YYZ

Nonstop4h 20mPorter Airlines

Deal found 20/2C$ 94

Wed 30/412:35 p.m.LAS - YYZ

Nonstop4h 24mWestJet

Deal found 19/2C$ 104

Tue 8/410:35 p.m.LAS - YYZ

Nonstop4h 20mAir Transat

Deal found 19/2C$ 112

Thu 3/410:30 p.m.LAS - YYZ

1 stop12h 25mMultiple Airlines

Deal found 18/2C$ 128

Tue 25/36:02 p.m.LAX - YTZ

2 stops21h 51mMultiple Airlines

Deal found 19/2C$ 155

Mon 7/47:00 a.m.LAX - YYZ

Nonstop4h 48mPorter Airlines

Deal found 20/2C$ 155

Tue 25/28:18 p.m.SAN - YYZ

2 stops21h 53mMultiple Airlines

Deal found 20/2C$ 158

Fri 4/412:10 p.m.LAX - YYZ

1 stop14h 45mMultiple Airlines

Deal found 19/2C$ 158

Find flights from California to Ontario within your budget

Fly from

Fly to

Route

Depart

Return

Price

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

Thu 10/4

11:25 p.m.-6:43 a.m.

Nonstop4h 18m

Toronto Pearson Intl

Tue 15/4

7:25 p.m.-9:28 p.m.

Nonstop5h 03m

C$ 176

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

Wed 16/4

11:25 p.m.-6:43 a.m.

Nonstop4h 18m

Toronto Pearson Intl

Mon 21/4

6:30 a.m.-12:32 p.m.

1 stop9h 02m

C$ 213

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

Fri 21/3

10:35 p.m.-5:55 a.m.

Nonstop4h 20m

Toronto Pearson Intl

Mon 31/3

2:00 p.m.-8:40 p.m.

1 stop9h 40m

C$ 214

Los AngelesToronto

LAX - YYZ

LAXYYZ

Los Angeles

Tue 15/4

5:25 p.m.-6:43 a.m.

1 stop10h 18m

Toronto Pearson Intl

Tue 22/4

8:00 p.m.-2:11 p.m.

1 stop21h 11m

C$ 241

OntarioToronto

ONT - YYZ

ONTYYZ

Ontario

Wed 9/4

2:43 p.m.-6:43 a.m.

1 stop13h 00m

Toronto Pearson Intl

Tue 15/4

8:00 p.m.-8:19 p.m.

1 stop27h 19m

C$ 249

San FranciscoToronto

SFO - YYZ

SFOYYZ

San Francisco

Tue 15/4

7:02 p.m.-6:43 a.m.

1 stop8h 41m

Toronto Pearson Intl

Tue 22/4

8:00 p.m.-7:45 a.m.

1 stop14h 45m

C$ 249

San JoseToronto

SJC - YYZ

SJCYYZ

San Jose

Tue 1/4

7:28 p.m.-5:55 a.m.

1 stop7h 27m

Toronto Pearson Intl

Tue 8/4

8:00 p.m.-4:31 p.m.

1 stop23h 31m

C$ 250

San DiegoToronto

SAN - YYZ

SANYYZ

San Diego

Wed 2/4

8:07 p.m.-6:43 a.m.

1 stop7h 36m

Toronto Pearson Intl

Wed 9/4

8:00 p.m.-7:16 p.m.

1 stop26h 16m

C$ 254

Los AngelesToronto

LAX - YYZ

LAXYYZ

Los Angeles

Tue 27/5

7:00 a.m.-8:54 p.m.

1 stop10h 54m

Toronto Pearson Intl

Sat 7/6

6:45 a.m.-5:17 p.m.

2 stops13h 32m

C$ 261

Las VegasToronto

LAS - YYZ

LASYYZ

Las Vegas Harry Reid Intl

Mon 17/3

12:59 a.m.-2:20 p.m.

1 stop10h 21m

Toronto Pearson Intl

Wed 26/3

8:00 a.m.-5:12 p.m.

2 stops12h 12m

C$ 270

Flights are sorted by cheapest round-trip flights first.

Deals found on 19/2

Showing 1-10 of 60 results

...

Best time to book a flight from California to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from California 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.

Travel insights for flights from California to Ontario

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

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

Currently, January is the cheapest month in which you can book a flight from California to Region of Ontario (average of C$ 167). Flying from California to Region of Ontario in July is currently the most expensive (average of C$ 258). 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 CA to ON?

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

Weekly flight availability from California to Region of Ontario

The most flights from USCA to CAON are scheduled on a Thursday (20 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (10 on average).

Rainfall in Ontario by month

In terms of precipitation, rainfall in Region of Ontario ranges from 51.0 - 83.0 mm per month. June is typically the wettest month, when rainfall can reach 83.0 mm. February is typically the driest time to visit Region of Ontario when rainfall is around 51.0 mm.

Temperature in Ontario by month

If weather is an important factor for your trip to Region of Ontario, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 21.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -6.0 C).

Reviews of airlines servicing Ontario

Read reviews from past customers who have flown ANA, Delta and Alaska Airlines from California to Ontario. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

ANA

8.4

Very good

842 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Feb 2025

MNL - HND

Great experience! Roomy economy leg room with foot rest, great crew and accommodations. Highly recommend!

ANA

8.4

Very good

842 reviews

ANA

8.4

Very good

842 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Feb 2025

MNL - HND

Great experience! Roomy economy leg room with foot rest, great crew and accommodations. Highly recommend!

Delta

8.0

Very good

8,220 reviews

ANA

8.4

Very good

842 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Feb 2025

MNL - HND

Great experience! Roomy economy leg room with foot rest, great crew and accommodations. Highly recommend!

Alaska Airlines

8.0

Very good

9,692 reviews

ANA

8.4

Very good

842 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Feb 2025

MNL - HND

Great experience! Roomy economy leg room with foot rest, great crew and accommodations. Highly recommend!

Porter Airlines

7.9

Good

276 reviews

ANA

8.4

Very good

842 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Feb 2025

MNL - HND

Great experience! Roomy economy leg room with foot rest, great crew and accommodations. Highly recommend!

KLM

7.8

Good

1,333 reviews

ANA

8.4

Very good

842 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Feb 2025

MNL - HND

Great experience! Roomy economy leg room with foot rest, great crew and accommodations. Highly recommend!

Related info for your journey

What are the cheapest airlines to fly from California to Region of Ontario one-way?
C$ 88 is the cheapest one-way deal found within the past few days, from Air Canada. You may also be able to find cheap deals on United Airlines and Porter Airlines, with prices starting from C$ 89 and C$ 94, respectively.
Can I find deals for flights from California to Ontario that include hotel bookings?
Yes. In addition to deals on California to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from California to Ontario?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from California to Ontario.
Can I find deals for business class flights from California to Ontario?
Yes. Cheapflights offers flight deals from California to Ontario 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 California to Region of Ontario?
Currently, January is the cheapest month in which you can book a flight from California to Region of Ontario (average of C$ 167). Flying from California to Region of Ontario in July is currently the most expensive (average of C$ 258). 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

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for California to Ontario

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Complete your trip

Region of Ontario car rentals

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Top 6 airlines flying from California to Ontario

Airline	Cheapest	Average	Flexibility	On-time
Air Canada	CheapestC$ 179	AverageC$ 782	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
Porter Airlines	CheapestC$ 212	AverageC$ 591	FlexibilityNo cancel fee	On-time52%	Search Porter Airlines flights
Lynx Air	CheapestC$ 214	AverageC$ 302	FlexibilityNo cancel fee	On-timeN/A	Search Lynx Air flights
Air Transat	CheapestC$ 246	AverageC$ 572	FlexibilityNo cancel fee	On-time50%	Search Air Transat flights
WestJet	CheapestC$ 254	AverageC$ 497	FlexibilityNo cancel fee	On-time60%	Search WestJet flights
United Airlines	CheapestC$ 324	AverageC$ 713	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights

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Cheap flights from California to Ontario from C$ 88

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 11/3. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from California to Ontario

Keep the following information in mind while searching for California to Ontario flight deals. Data was last updated 20 February 2025.

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Find flight deals from California to Ontario

Cheapest flights from California to OntarioExplore the most affordable flight options available from California to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 20 February 2025.

Explore the most affordable flight options available from California to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 20 February 2025.

Find flights from California to Ontario within your budget

Best time to book a flight from California to Ontario

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

Travel insights for flights from California to Ontario

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

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

What is the cheapest time of day to fly from CA to ON?

Find hourly flight availability from California to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 20 February 2025.

Weekly flight availability from California to Region of Ontario

Explore weekly flight availability from California to Ontario. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 20 February 2025.

Rainfall in Ontario by month

Plan your trip to Ontario by taking into account the average rainfall totals by month.

Temperature in Ontario by month

Plan your trip to Ontario by taking into account the average temperature totals by month.

Reviews of airlines servicing Ontario

Read reviews from past customers who have flown ANA, Delta and Alaska Airlines from California to Ontario. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from California to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What are the cheapest airlines to fly from California to Region of Ontario one-way?

Can I find deals for flights from California to Ontario that include hotel bookings?

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Can I find deals for business class flights from California to Ontario?

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

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Alternative routes for California to Ontario

See prices for flight routes from nearby airports that may be better suited for you.

Top 6 airlines flying from California to Ontario

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How does Cheapflights help users find flights from California to Ontario?

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Cheapest flights from California to Ontario
Explore the most affordable flight options available from California to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 20 February 2025.