What are the cheapest airlines flying from Ontario to Oakland, California round-trip?

Currently priced at $197, Southwest will fly you from Ontario to Oakland, California and back. In addition to Southwest, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Alaska Airlines and Delta - these airlines can fly you to your destination from $282 and $1,243, respectively.

What are the cheapest airlines to fly from Ontario to Oakland, California one-way?

$99 is the cheapest one-way deal found within the past few days, from Southwest. You may also be able to find cheap deals on Alaska Airlines and Delta, with prices starting from $141 and $153, respectively.

What is the cheapest day to fly from Ontario to Oakland, California?

Travelers seeking maximum savings on their Ontario to Oakland, California flight should consider departing on Saturday evenings when fares are most often at their lowest. Tuesday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

What are the cheapest flights from Ontario to Oakland, California?

The cheapest flight price from Ontario to Oakland, California is $106. On average you can expect to pay $369. The most popular route, (Ontario - Oakland), can usually be booked for $225.

What are the most popular airlines that fly from Ontario to Oakland, California?

Before booking your flight from Ontario to Oakland, California check out the most popular airlines for this route: Alaska Airlines, Delta or Frontier.

What is the cheapest day to fly round-trip from Ontario to Oakland, California?

Leaving on a Thursday is a viable option for saving on travel. Heavily demanded days of the week can typically drive up the prices you see. Booking your travel for a less competitive day can save up to 53% on the overall cost on flights from Ontario to Oakland, California.

How far in advance should I book a flight from Ontario to Oakland, California?

To save on the cost of your flight from Ontario to Oakland, California, book at least 36 days before your planned departure. Booking around this time can save you about 87% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $116 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $177.

What is the cheapest month to fly from Ontario to Oakland, California?

The best pricing can be found in the month of October. Prices to Oakland, California from Ontario average $131. You can even find prices in October for less than $131, as users have found deals to Oakland, California from as low as $34. The month of March appears to be one of the more expensive times to travel to Oakland, California from Ontario. Flying in the targeted month can save you up to 20%.

Most accurate provider : When it comes to deals on Ontario-Oakland, California flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Oakland, California flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Oakland, California flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on Ontario-Oakland, California flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Oakland, California flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

What airports do I use to fly from Ontario to Oakland?

If you wish to fly to Oakland from Ontario, then you need to book flights from Ontario to Oakland. There are 3 flights from Ontario (ONT) to Oakland (OAK) per day to choose from. Flights to Oakland from Ontario are available from 6 different airlines, which means you should have some options if you want to compare airfare deals. 1h 15m is how long a nonstop flight from Ontario to Oakland typically takes.

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

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

How can I find direct flights from Ontario to Oakland?

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

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

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

$99+ Flights from Ontario to Oakland, CA

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Find cheap flights from Ontario to Oakland with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

The best prices from Ontario to Oakland are usually found in May or April, booked 18 days in advance, depart on a Friday or Thursday and return on a Thursday

Cheap flight deals from Ontario to Oakland

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$197 (Southwest)
One-way from	$99 (Southwest)
Popular in	August
Cheapest in	May
Average price	$222
Good round-trip deal	$329 or less
Good one-way deal	$213 or less

Provider with most accurate pricing for Ontario-Oakland flight deals.

Search Deals

Provider most trusted by Cheapflights users for Ontario-Oakland flights.

Search Deals

From Ontario to Oakland

Search Deals

One-way flight from Ontario to Oakland

Search Deals

Highest demand for flights based on searches. 7% potential increase in price ($16 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 5% potential price decrease ($11 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in January 2025

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

Search Deals

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

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Find flight deals from Ontario to Oakland

Cheapest flights from Ontario to Oakland
Explore the most affordable flight options available from Ontario to Oakland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on enero 21, 2025.

mar. 2/116:45 pmONT - OAK

Nonstop1h 25mSouthwest

mié. 2/126:30 pmOAK - ONT

Nonstop1h 25mSouthwest

Deal found 1/21

$197

mié. 3/57:00 amONT - OAK

1 stop11h 50mAlaska Airlines

mar. 3/118:32 pmOAK - ONT

1 stop20h 27mAlaska Airlines

Deal found 1/21

$282

Best flights from Ontario to Oakland
Discover carefully curated flight deals from Ontario to Oakland that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated enero 21, 2025.

mar. 2/116:45 pmONT - OAK

Nonstop1h 25mSouthwest

mié. 2/126:30 pmOAK - ONT

Nonstop1h 25mSouthwest

Deal found 1/21

$197

mié. 3/57:00 amONT - OAK

1 stop11h 50mAlaska Airlines

mar. 3/118:32 pmOAK - ONT

1 stop20h 27mAlaska Airlines

Deal found 1/21

$282

vie. 2/76:00 amONT - OAK

1 stop6h 30mDelta

dom. 2/96:00 amOAK - ONT

1 stop6h 24mDelta

Deal found 1/21

$1,243

Last-minute flights from Ontario to Oakland
Discover last-minute flight deals from Ontario to Oakland. Data last updated enero 21, 2025 and is based on user searches.

mar. 1/285:45 amONT - OAK

1 stop6h 45mSouthwest

mar. 1/282:50 pmOAK - ONT

1 stop5h 55mSouthwest

Deal found 1/21

$523

jue. 1/307:00 amONT - OAK

1 stop25h 49mAlaska Airlines

mar. 2/410:41 amOAK - ONT

1 stop23h 53mAlaska Airlines

Deal found 1/21

$323

jue. 1/306:00 amONT - OAK

1 stop6h 33mDelta

jue. 1/305:01 pmOAK - ONT

1 stop6h 52mDelta

Deal found 1/21

$1,953

lun. 2/107:00 amONT - OAK

1 stop25h 49mAlaska Airlines

mié. 2/1210:41 amOAK - ONT

1 stop13h 17mAlaska Airlines

Deal found 1/21

$292

mar. 2/116:45 pmONT - OAK

Nonstop1h 25mSouthwest

mié. 2/126:30 pmOAK - ONT

Nonstop1h 25mSouthwest

Deal found 1/21

$197

One-way flights from Ontario to Oakland
Search for one-way flight options from Ontario to Oakland. Find affordable one-way fares based on user searches. Data last updated enero 21, 2025.

mié. 4/97:50 pmONT - OAK

Nonstop1h 20mSouthwest

Deal found 1/21

$99

mié. 4/234:29 pmONT - OAK

1 stop7h 15mAlaska Airlines

Deal found 1/21

$141

mié. 2/196:00 amONT - OAK

2 stops17h 56mDelta

Deal found 1/21

$153

Find flights from Ontario to Oakland within your budget

Fly from

Fly to

Route

Depart

Return

Price

OntarioOakland

ONT - OAK

ONTOAK

Ontario

mar. 2/11

6:45 pm-8:10 pm

Nonstop1h 25m

Oakland

mié. 2/12

6:30 pm-7:55 pm

Nonstop1h 25m

$197

OntarioOakland

ONT - OAK

ONTOAK

Ontario

mié. 3/5

7:00 am-6:50 pm

1 stop11h 50m

Oakland

mar. 3/11

8:32 pm-4:59 pm

1 stop20h 27m

$282

OntarioOakland

ONT - OAK

ONTOAK

Ontario

vie. 2/7

6:00 am-12:30 pm

1 stop6h 30m

Oakland

dom. 2/9

6:00 am-12:24 pm

1 stop6h 24m

$1,243

OntarioOakland

ONT - OAK

ONTOAK

Ontario

mié. 4/9

7:50 pm-9:10 pm

Nonstop1h 20m

$99

OntarioOakland

ONT - OAK

ONTOAK

Ontario

mié. 4/23

4:29 pm-11:44 pm

1 stop7h 15m

$141

OntarioOakland

ONT - OAK

ONTOAK

Ontario

mié. 2/19

6:00 am-11:56 pm

2 stops17h 56m

$153

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/21

Compare providers for flights from Ontario to Oakland

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Oakland in January.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*3 stars
eDreams	Price Accuracy3 stars	Trust Score*3 stars
Priceline	Price Accuracy2 stars	Trust Score*3 stars
Cheapfaremart	Price Accuracy-	Trust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on Ontario-Oakland, California flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Oakland, California flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Oakland, California flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on Ontario-Oakland, California flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Oakland, California flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Ontario to Oakland

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

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

How far ahead should I book a flight from Ontario to Oakland, California?

The price you pay for your flight from Ontario to Oakland, California may vary depending on when you book. For the best chance of a lower fare, look to book 18 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, April is the cheapest month in which you can book a flight from Ontario to Oakland, California (average of $183). Flying from Ontario to Oakland, California in November is currently the most expensive (average of $259). 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 ONT to OAK?

Unlike in the evening, when flights are generally more expensive, you can save up to 24% on flights from Ontario to Oakland, California by exploring options for tickets in the afternoon.

Weekly flight availability from Ontario to Oakland, California

The most flights from ONT to OAK are scheduled on a Monday (4 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (2 on average).

Rainfall in Oakland by month

In terms of precipitation, rainfall in Oakland, California ranges from 0.0 - 4.8 inches per month. January is typically the wettest month, when rainfall can reach 4.8 in. July is typically the driest time to visit Oakland, California when rainfall is around 0.0 in.

Temperature in Oakland by month

If weather is an important factor for your trip to Oakland, California, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 66.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 51.8 F).

Reviews of airlines servicing Oakland

Read reviews from past customers who have flown Southwest, Delta and Alaska Airlines from Ontario to Oakland. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Southwest

8.1

Very good

4,662 reviews

Reviews

1 / 10

No issues. I needed pre boarding and I was able to get it without issue

Southwest

8.1

Very good

4,662 reviews

Southwest

8.1

Very good

4,662 reviews

Reviews

1 / 10

No issues. I needed pre boarding and I was able to get it without issue

Alaska Airlines

8.0

Very good

9,706 reviews

Southwest

8.1

Very good

4,662 reviews

Reviews

1 / 10

No issues. I needed pre boarding and I was able to get it without issue

Delta

8.0

Very good

8,521 reviews

Southwest

8.1

Very good

4,662 reviews

Reviews

1 / 10

No issues. I needed pre boarding and I was able to get it without issue

Related info for your journey

What airports do I use to fly from Ontario to Oakland?
If you wish to fly to Oakland from Ontario, then you need to book flights from Ontario to Oakland. There are 3 flights from Ontario (ONT) to Oakland (OAK) per day to choose from. Flights to Oakland from Ontario are available from 6 different airlines, which means you should have some options if you want to compare airfare deals. 1h 15m is how long a nonstop flight from Ontario to Oakland typically takes.
What are the cheapest airlines flying from Ontario to Oakland, California round-trip?
Currently priced at $197, Southwest will fly you from Ontario to Oakland, California and back. In addition to Southwest, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Alaska Airlines and Delta - these airlines can fly you to your destination from $282 and $1,243, respectively.
What are the cheapest airlines to fly from Ontario to Oakland, California one-way?
$99 is the cheapest one-way deal found within the past few days, from Southwest. You may also be able to find cheap deals on Alaska Airlines and Delta, with prices starting from $141 and $153, respectively.
What are the cheapest flights from Ontario to Oakland, California?
The cheapest flight price from Ontario to Oakland, California is $106. On average you can expect to pay $369. The most popular route, (Ontario - Oakland), can usually be booked for $225.
Can I find deals for flights from Ontario to Oakland that include hotel bookings?
Yes. In addition to deals on Ontario to Oakland flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Ontario to Oakland?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Oakland.
Can I find deals for business class flights from Ontario to Oakland?
Yes. Cheapflights offers flight deals from Ontario to Oakland 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 Ontario to Oakland, California?
Currently, April is the cheapest month in which you can book a flight from Ontario to Oakland, California (average of $183). Flying from Ontario to Oakland, California in November is currently the most expensive (average of $259). 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

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Top 6 airlines flying from Ontario to Oakland

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$32	Average$68	FlexibilityNo cancel fee	On-time62%
Alaska Airlines	Cheapest$45	Average$386	FlexibilityNo cancel fee	On-time75%
Spirit Airlines	Cheapest$48	Average$82	FlexibilityNo cancel fee	On-time65%
Delta	Cheapest$50	Average$216	FlexibilityNo cancel fee	On-timeN/A
Breeze Airways	Cheapest$73	Average$178	FlexibilityNo cancel fee	On-timeN/A
Southwest	Cheapest$198	Average$278	FlexibilityNo cancel fee	On-time63%

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$99+ Cheap flights from Ontario to Oakland, CA (ONT - OAK)

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 4/9. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Ontario to Oakland with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

The best prices from Ontario to Oakland are usually found in May or April, booked 18 days in advance, depart on a Friday or Thursday and return on a Thursday

Cheap flight deals from Ontario to Oakland

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from Ontario to Oakland

Cheapest flights from Ontario to OaklandExplore the most affordable flight options available from Ontario to Oakland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on enero 21, 2025.

Explore the most affordable flight options available from Ontario to Oakland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on enero 21, 2025.

Find flights from Ontario to Oakland within your budget

Compare providers for flights from Ontario to Oakland

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Oakland in January.

Best time to book a flight from Ontario to Oakland

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

Travel insights for flights from Ontario to Oakland

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

How far ahead should I book a flight from Ontario to Oakland, California?

Use this chart to determine the optimal time to book a round-trip flight from Ontario to Oakland. Price data was last updated on January 17, 2025.

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

What is the cheapest time of day to fly from ONT to OAK?

Find hourly flight availability from Ontario to Oakland. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated enero 21, 2025.

Weekly flight availability from Ontario to Oakland, California

Explore weekly flight availability from Ontario to Oakland. 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 enero 21, 2025.

Rainfall in Oakland by month

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

Temperature in Oakland by month

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

Reviews of airlines servicing Oakland

Read reviews from past customers who have flown Southwest, Delta and Alaska Airlines from Ontario to Oakland. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

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

What airports do I use to fly from Ontario to Oakland?

What are the cheapest airlines flying from Ontario to Oakland, California round-trip?

What are the cheapest airlines to fly from Ontario to Oakland, California one-way?

What are the cheapest flights from Ontario to Oakland, California?

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

How can I find direct flights from Ontario to Oakland?

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

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

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.

Alternative routes for Ontario to Oakland

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

Top 6 airlines flying from Ontario to Oakland

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Cheapest flights from Ontario to Oakland
Explore the most affordable flight options available from Ontario to Oakland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on enero 21, 2025.