What are the cheapest airlines flying from San Diego to Ontario round-trip?

Our cheapest airline available from San Diego to Ontario is Alaska Airlines. Our recent data shows that you can find tickets from as low as $342 on this airline. Additional options worth looking into are American Airlines and United Airlines, starting at $345 and $384 round-trip.

How recently were the San Diego to Ontario flight deals updated?

The San Diego to Ontario flight deals you see on this page were last updated on 6/6.

What is the cheapest month to book a flight from San Diego to Ontario?

Currently, October is the cheapest month in which you can book a flight from San Diego to Ontario (average of $239). Flying from San Diego to Ontario in July is currently the most expensive (average of $327). 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.

In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.

Can I find flights from San Diego to Ontario for under $400 on Cheapflights?

Yes, there are multiple flights from San Diego to Ontario for under $400. The cheapest flight booked recently is on Alaska Airlines for just $342, but on average you can expect to pay $612.

Are there last-minute flights available from San Diego to Ontario for under $500?

There are currently 13+ open flights from San Diego to Ontario within the next 7 days for less than $500.

What does SAN to ONT mean?

San Diego Airport is SAN and Ontario Airport is ONT. These codes are created by the International Air Transport Association (IATA) and airlines use them to identify the departing and arrival airports in the flight routes they service.

Can I find deals for flights from San Diego to Ontario that include extra baggage allowance?

The amount of baggage you can bring on your San Diego to Ontario flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

Can I find deals on flights from San Diego to Ontario with specific airlines?

Yes, Cheapflights allows you to browse and filter San Diego to Ontario flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

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

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

How can I find direct flights from San Diego to Ontario?

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

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

Yes. Cheapflights offers flight deals from San Diego 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.

Can I find deals for flights from San Diego to Ontario that allow pets onboard?

Many airlines flying from San Diego to Ontario offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

Can I find deals on last-minute flights from San Diego to Ontario?

Yes, you can often find last-minute deals on San Diego to Ontario flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

Flights from San Diego, CA to Ontario, CA from $171

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Cheap flight deals from San Diego to Ontario

Round-trip from	$238
One-way from	$171

From San Diego to Ontario

Search Deals

One-way flight from San Diego to Ontario

Search Deals

What is the cheapest day to fly round-trip from San Diego to Ontario?

Departing on a Friday is a good option for securing a great price. You can expect to save up to 123% when planning your travel around this day of the week.

How far in advance should I book a flight from San Diego to Ontario?

Find a great deal and save up to 50% by booking at least 26 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from San Diego to Ontario within the next two weeks, with the cheapest ticket starting at $183.

What is the cheapest month to fly from San Diego to Ontario?

Our data shows that October tends to be the cheapest month to fly to Ontario from San Diego. Users have commonly found prices around $179 for the month, but tickets can be as low as $138. Due to multiple factors, prepare for potentially higher prices in March.

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

It’s optimal to fly from San Diego to Ontario in the morning. By choosing this option you can save up to 21% on the cost of your flight, compared to a flight at noon.

Cheap San Diego to Ontario flights in June & July 2024

Scroll through some of the best deals on flights from San Diego to Ontario in 2024. Check back regularly for other flight deals.

Fri 7/58:50 pmSAN - ONT

1 stop12h 15mAlaska Airlines

Fri 7/126:00 amONT - SAN

1 stop17h 59mAlaska Airlines

Deal found 6/6$352

Wed 7/31:25 pmSAN - ONT

1 stop9h 20mUnited Airlines

Wed 7/101:45 pmONT - SAN

1 stop10h 10mUnited Airlines

Deal found 6/5$393

Tue 7/91:25 pmSAN - ONT

1 stop9h 20mUnited Airlines

Mon 9/97:40 amONT - SAN

1 stop7h 19mUnited Airlines

Deal found 6/6$400

Mon 7/226:15 amSAN - ONT

1 stop17h 44mAlaska Airlines

Sun 7/289:09 pmONT - SAN

1 stop11h 27mAlaska Airlines

Deal found 6/5$422

Tue 6/187:20 amSAN - ONT

1 stop15h 07mUnited Airlines

Tue 6/251:55 pmONT - SAN

1 stop10h 04mUnited Airlines

Deal found 6/4$435

Fri 7/56:15 amSAN - ONT

1 stop9h 14mAlaska Airlines

Fri 7/124:24 pmONT - SAN

1 stop7h 35mAlaska Airlines

Deal found 6/5$492

Wed 6/261:21 pmSAN - ONT

1 stop9h 06mUnited Airlines

Thu 6/2712:05 pmONT - SAN

1 stop11h 50mUnited Airlines

Deal found 6/5$519

Mon 6/176:40 amSAN - ONT

1 stop10h 48mUnited Airlines

Tue 6/186:25 pmONT - SAN

1 stop13h 02mUnited Airlines

Deal found 6/5$562

Fri 6/1412:36 pmSAN - ONT

1 stop9h 04mAmerican Airlines

Sat 6/156:30 amONT - SAN

1 stop8h 41mAmerican Airlines

Deal found 6/5$647

San Diego to Ontario 2024 flight deals

Scroll through some of the best deals on flights from San Diego to Ontario in 2024. Check back regularly for other flight deals.

Fri 8/97:39 pmSAN - ONT

1 stop16h 14mAmerican Airlines

Fri 8/1612:46 pmONT - SAN

1 stop9h 00mAmerican Airlines

Deal found 6/6$325

Fri 9/138:45 pmSAN - ONT

1 stop12h 30mAlaska Airlines

Mon 9/166:00 amONT - SAN

1 stop17h 44mAlaska Airlines

Deal found 6/6$342

Fri 9/137:40 pmSAN - ONT

1 stop20h 22mAmerican Airlines

Mon 9/167:23 pmONT - SAN

1 stop19h 57mAmerican Airlines

Deal found 6/5$345

Fri 7/58:50 pmSAN - ONT

1 stop12h 15mAlaska Airlines

Fri 7/126:00 amONT - SAN

1 stop17h 59mAlaska Airlines

Deal found 6/6$352

Tue 8/131:25 pmSAN - ONT

1 stop9h 20mUnited Airlines

Mon 8/262:02 pmONT - SAN

1 stop7h 22mUnited Airlines

Deal found 6/5$384

Wed 7/31:25 pmSAN - ONT

1 stop9h 20mUnited Airlines

Wed 7/101:45 pmONT - SAN

1 stop10h 10mUnited Airlines

Deal found 6/5$393

Tue 7/91:25 pmSAN - ONT

1 stop9h 20mUnited Airlines

Mon 9/97:40 amONT - SAN

1 stop7h 19mUnited Airlines

Deal found 6/6$400

Mon 7/226:15 amSAN - ONT

1 stop17h 44mAlaska Airlines

Sun 7/289:09 pmONT - SAN

1 stop11h 27mAlaska Airlines

Deal found 6/5$422

Tue 6/187:20 amSAN - ONT

1 stop15h 07mUnited Airlines

Tue 6/251:55 pmONT - SAN

1 stop10h 04mUnited Airlines

Deal found 6/4$435

San Diego to Ontario flights leaving soon

Book one of these great deals on flights from San Diego to Ontario. To prevent any unwanted surprises, users should verify their flight info before booking.

Tue 6/187:20 amSAN - ONT

1 stop15h 07mUnited Airlines

Tue 6/251:55 pmONT - SAN

1 stop10h 04mUnited Airlines

Deal found 6/4$435

Mon 6/176:40 amSAN - ONT

1 stop10h 48mUnited Airlines

Tue 6/186:25 pmONT - SAN

1 stop13h 02mUnited Airlines

Deal found 6/5$562

Fri 6/1412:36 pmSAN - ONT

1 stop9h 04mAmerican Airlines

Sat 6/156:30 amONT - SAN

1 stop8h 41mAmerican Airlines

Deal found 6/5$647

Fri 6/1410:35 amSAN - ONT

1 stop11h 52mUnited Airlines

Sat 6/155:15 amONT - SAN

2 stops18h 44mUnited Airlines

Deal found 6/5$725

Mon 6/107:20 pmSAN - ONT

1 stop17h 25mUnited Airlines

Mon 6/175:15 amONT - SAN

2 stops18h 44mUnited Airlines

Deal found 6/5$790

Mon 6/104:20 pmSAN - ONT

1 stop40h 27mAmerican Airlines

Mon 6/174:36 pmONT - SAN

1 stop22h 35mAmerican Airlines

Deal found 6/5$830

Fri 6/71:21 pmSAN - ONT

1 stop10h 48mUnited Airlines

Sun 6/95:50 amONT - SAN

1 stop18h 09mUnited Airlines

Deal found 6/5$874

Mon 6/1712:36 pmSAN - ONT

1 stop3h 15mAmerican Airlines

Sat 6/294:36 pmONT - SAN

1 stop5h 14mAmerican Airlines

Deal found 6/5$877

Sat 6/812:36 pmSAN - ONT

1 stop3h 15mAmerican Airlines

Wed 6/124:36 pmONT - SAN

1 stop5h 14mAmerican Airlines

Deal found 6/4$1,005

One-way flights to Ontario from San Diego

Users in need of a one-way flight from San Diego to Ontario can choose from these deals. For those needing a return trip from San Diego, there is a search form available above.

Fri 7/194:55 pmSAN - ONT

1 stop7h 04mAlaska Airlines

Deal found 6/6$171

Fri 7/58:50 pmSAN - ONT

1 stop12h 15mAlaska Airlines

Deal found 6/5$187

Tue 7/2310:45 amSAN - ONT

1 stop12h 00mUnited Airlines

Deal found 6/5$197

Tue 7/210:45 amSAN - ONT

1 stop12h 00mUnited Airlines

Deal found 6/5$207

Wed 7/310:45 amSAN - ONT

1 stop12h 00mUnited Airlines

Deal found 6/5$209

Thu 7/44:55 pmSAN - ONT

1 stop7h 04mAlaska Airlines

Deal found 6/4$211

Thu 7/116:15 amSAN - ONT

1 stop13h 10mAlaska Airlines

Deal found 6/5$217

Mon 7/17:26 pmSAN - ONT

1 stop16h 49mUnited Airlines

Deal found 6/5$227

Fri 7/56:15 amSAN - ONT

1 stop16h 30mUnited Airlines

Deal found 6/5$233

Find flights from San Diego to Ontario within your budget

Fly from

Fly to

Budget

$342 - $492

Route

Depart

Return

Price

San DiegoOntario

SAN - ONT

SANONT

San Diego

Fri 9/13

1 stop12h 30m

Ontario

Mon 9/16

1 stop17h 44m

$342

San DiegoOntario

SAN - ONT

SANONT

San Diego

Fri 9/13

1 stop20h 22m

Ontario

Mon 9/16

1 stop19h 57m

$345

San DiegoOntario

SAN - ONT

SANONT

San Diego

Fri 7/5

1 stop12h 15m

Ontario

Fri 7/12

1 stop17h 59m

$352

San DiegoOntario

SAN - ONT

SANONT

San Diego

Tue 8/13

1 stop9h 20m

Ontario

Mon 8/26

1 stop7h 22m

$384

San DiegoOntario

SAN - ONT

SANONT

San Diego

Wed 7/3

1 stop9h 20m

Ontario

Wed 7/10

1 stop10h 10m

$393

San DiegoOntario

SAN - ONT

SANONT

San Diego

Tue 7/9

1 stop9h 20m

Ontario

Mon 9/9

1 stop7h 19m

$400

San DiegoOntario

SAN - ONT

SANONT

San Diego

Mon 7/22

1 stop17h 44m

Ontario

Sun 7/28

1 stop11h 27m

$422

San DiegoOntario

SAN - ONT

SANONT

San Diego

Tue 6/18

1 stop15h 07m

Ontario

Tue 6/25

1 stop10h 04m

$435

San DiegoOntario

SAN - ONT

SANONT

San Diego

Fri 7/5

1 stop9h 14m

Ontario

Fri 7/12

1 stop7h 35m

$492

Flights are sorted by cheapest first

Deals found on 6/6

What is the cheapest day to fly from San Diego to Ontario?

Morning

Noon

Afternoon

Evening

All times are departure.

Travelers seeking maximum savings on their San Diego to Ontario flight should consider departing on Wednesday mornings when fares are most often at their lowest. Wednesday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Search Deals

Best time to book a flight from San Diego to Ontario

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

Estimated round-trip price

Temperature and rainfall in Ontario by month

LAX Temperature	57.2 - 73.4 °F

LAX

Temperature

57.2 - 73.4 °F

If weather is an important factor for your trip to Ontario, 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 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).

Reviews of airlines servicing Ontario

To help decide which airline to fly from San Diego to Ontario, see what other customers have to say about American Airlines, Alaska Airlines and United Airlines. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Alaska Airlines

8.1

Very good

9,222 reviews

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

Alaska Airlines

8.1

Very good

9,222 reviews

Alaska Airlines

8.1

Very good

9,222 reviews

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

United Airlines

7.4

Good

10,696 reviews

Alaska Airlines

8.1

Very good

9,222 reviews

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

American Airlines

7.3

Good

14,227 reviews

Alaska Airlines

8.1

Very good

9,222 reviews

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

Related info for your journey

Can I find flights from San Diego to Ontario for under $400 on Cheapflights?
Yes, there are multiple flights from San Diego to Ontario for under $400. The cheapest flight booked recently is on Alaska Airlines for just $342, but on average you can expect to pay $612.
Are there last-minute flights available from San Diego to Ontario for under $500?
There are currently 13+ open flights from San Diego to Ontario within the next 7 days for less than $500.
What are the cheapest airlines flying from San Diego to Ontario round-trip?
Our cheapest airline available from San Diego to Ontario is Alaska Airlines. Our recent data shows that you can find tickets from as low as $342 on this airline. Additional options worth looking into are American Airlines and United Airlines, starting at $345 and $384 round-trip.
What does SAN to ONT mean?
San Diego Airport is SAN and Ontario Airport is ONT. These codes are created by the International Air Transport Association (IATA) and airlines use them to identify the departing and arrival airports in the flight routes they service.
Can I find deals for flights from San Diego to Ontario that include extra baggage allowance?
The amount of baggage you can bring on your San Diego to Ontario flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.
Can I find deals on flights from San Diego to Ontario with specific airlines?
Yes, Cheapflights allows you to browse and filter San Diego to Ontario flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.
Can I find deals for flights from San Diego to Ontario that include hotel bookings?
Yes. In addition to deals on San Diego to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from San Diego to Ontario?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Diego to Ontario.
Can I find deals for business class flights from San Diego to Ontario?
Yes. Cheapflights offers flight deals from San Diego 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.
Can I find deals for flights from San Diego to Ontario that allow pets onboard?
Many airlines flying from San Diego to Ontario offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.
Can I find deals on last-minute flights from San Diego to Ontario?
Yes, you can often find last-minute deals on San Diego to Ontario flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.
How recently were the San Diego to Ontario flight deals updated?
The San Diego to Ontario flight deals you see on this page were last updated on 6/6.
What is the cheapest month to book a flight from San Diego to Ontario?
Currently, October is the cheapest month in which you can book a flight from San Diego to Ontario (average of $239). Flying from San Diego to Ontario in July is currently the most expensive (average of $327). 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 San Diego to Ontario
See prices for flight routes from nearby airports that may be better suited for you.

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Complete your trip
Complete your trip to Ontario by adding a car rental and/or hotel reservation to your travel itinerary.

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Other flights to Ontario
Explore flights to Ontario departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on June 6, 2024.

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Search flights from San Diego to Ontario by cabin class

Weekly flight availability from San Diego to Ontario

Sunday	0daily flights
Monday	1daily flight
Tuesday	1daily flight
Wednesday	1daily flight
Thursday	1daily flight
Friday	1daily flight
Saturday	0daily flights

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Cheap flights from San Diego to Ontario (SAN - ONT) from $171

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 7/19. 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.

Cheap flight deals from San Diego to Ontario

Round-trip from

One-way from

What is the cheapest day to fly round-trip from San Diego to Ontario?

How far in advance should I book a flight from San Diego to Ontario?

What is the cheapest month to fly from San Diego to Ontario?

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

Cheap San Diego to Ontario flights in June & July 2024

Find cheap flight options from San Diego to Ontario specifically for the months of June and July 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 3,050,429 searches. Prices were last updated on June 6, 2024.

Scroll through some of the best deals on flights from San Diego to Ontario in 2024. Check back regularly for other flight deals.

San Diego to Ontario 2024 flight deals

Discover exclusive flight deals for travel between San Diego and Ontario in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 3,050,429 searches. Data last updated June 6, 2024.

Scroll through some of the best deals on flights from San Diego to Ontario in 2024. Check back regularly for other flight deals.

San Diego to Ontario flights leaving soon

Book one of these great deals on flights from San Diego to Ontario. To prevent any unwanted surprises, users should verify their flight info before booking.

One-way flights to Ontario from San Diego

Users in need of a one-way flight from San Diego to Ontario can choose from these deals. For those needing a return trip from San Diego, there is a search form available above.

Find flights from San Diego to Ontario within your budget

What is the cheapest day to fly from San Diego to Ontario?

Use this chart to determine the cheapest time to fly round-trip from San Diego to Ontario. Price data was last updated on June 2, 2024.

Best time to book a flight from San Diego to Ontario

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

Temperature and rainfall in Ontario by month

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

Reviews of airlines servicing Ontario

Related info for your journey

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

Can I find flights from San Diego to Ontario for under $400 on Cheapflights?

Are there last-minute flights available from San Diego to Ontario for under $500?

What are the cheapest airlines flying from San Diego to Ontario round-trip?

What does SAN to ONT mean?

Can I find deals for flights from San Diego to Ontario that include extra baggage allowance?

Can I find deals on flights from San Diego to Ontario with specific airlines?

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

How can I find direct flights from San Diego to Ontario?

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

Can I find deals for flights from San Diego to Ontario that allow pets onboard?

Can I find deals on last-minute flights from San Diego to Ontario?

How recently were the San Diego to Ontario flight deals updated?

What is the cheapest month to book a flight from San Diego to Ontario?

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 San Diego to OntarioSee prices for flight routes from nearby airports that may be better suited for you.

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

Popular flight searches

Check out other popular destinations found by fellow travelers in 2024

Search flights from San Diego to Ontario by cabin class

Find flights from San Diego to Ontario, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Weekly flight availability from San Diego to Ontario

Explore weekly flight availability from San Diego 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 June 6, 2024.

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User searches for flights to these destinations increased 20% or more in the past 90 days compared to other destinations

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Alternative routes for San Diego to Ontario
See prices for flight routes from nearby airports that may be better suited for you.