Cheap flights from Ontario to San Diego (ONT - SAN) from $63

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 4/7. 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 — SAN
abr 2 — abr 91

Cheap flight deals from Ontario to San Diego

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to San Diego (SAN). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated março 28, 2024.

Popular in

December

Cheapest in

August

Round-trip from

$288

One-way from

$135
High demand for flights, 72% potential price rise
Best time to find cheap flights, 78% potential price drop
From Ontario to San Diego
One-way flight from Ontario to San Diego

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

Find a great deal and save up to 64% by booking at least 22 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 Ontario to San Diego within the next two weeks, with the cheapest ticket starting at $185.

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

The best pricing can be found in the month of July. Prices to San Diego from Ontario average $207. You can even find prices in July for less than $207, as users have found deals to San Diego from as low as $138. The month of June appears to be one of the more expensive times to travel to San Diego from Ontario. Flying in the targeted month can save you up to 19%.

When is the cheapest time to fly from Ontario to San Diego (ONT - SAN)?

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

Cheap Alaska Airlines flights from Ontario to San Diego

Explore cheap flight options specifically provided by Alaska Airlines for the route between Ontario and San Diego. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 3,238,496 searches. Data last updated março 28, 2024.
Peruse some of the lowest-priced Alaska Airlines flights we've found from Ontario to San Diego. It's recommended that users confirm their flight details before booking.
sex 4/267:59 pmONT - SAN
1 stop12h 51mAlaska Airlines
sex 5/32:00 pmSAN - ONT
1 stop9h 59mAlaska Airlines
Deal found 3/27$347
sáb 4/276:00 amONT - SAN
1 stop6h 40mAlaska Airlines
sáb 5/46:15 amSAN - ONT
1 stop9h 50mAlaska Airlines
Deal found 3/28$382
sex 4/264:41 pmONT - SAN
1 stop7h 17mAlaska Airlines
sex 5/32:00 pmSAN - ONT
1 stop9h 59mAlaska Airlines
Deal found 3/27$397
sex 4/267:59 pmONT - SAN
1 stop12h 51mAlaska Airlines
sex 5/34:00 pmSAN - ONT
1 stop7h 59mAlaska Airlines
Deal found 3/27$487
dom 9/17:00 amONT - SAN
1 stop6h 16mAlaska Airlines
seg 9/22:02 pmSAN - ONT
1 stop8h 13mAlaska Airlines
Deal found 3/27$522
qui 4/46:00 amONT - SAN
1 stop17h 59mAlaska Airlines
sáb 4/66:15 amSAN - ONT
1 stop17h 44mAlaska Airlines
Deal found 3/27$1,107

Cheap United Airlines flights from Ontario to San Diego

Explore cheap flight options specifically provided by United Airlines for the route between Ontario and San Diego. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 3,238,496 searches. Data last updated março 28, 2024.
Have a look at some of the cheapest available United Airlines flights departing from Ontario and landing in San Diego. Deals are refreshing constantly so come back soon for more options.
sáb 4/2010:45 amONT - SAN
1 stop7h 34mUnited Airlines
qua 4/245:20 pmSAN - ONT
1 stop5h 44mUnited Airlines
Deal found 3/26$374
qua 4/246:00 amONT - SAN
1 stop4h 32mUnited Airlines
qua 5/11:50 pmSAN - ONT
1 stop9h 14mUnited Airlines
Deal found 3/27$404
sáb 5/116:00 amONT - SAN
1 stop14h 51mUnited Airlines
dom 5/126:15 amSAN - ONT
1 stop16h 49mUnited Airlines
Deal found 3/27$405
sáb 4/205:15 amONT - SAN
2 stops13h 04mUnited Airlines
qua 4/245:20 pmSAN - ONT
1 stop5h 44mUnited Airlines
Deal found 3/26$450
qua 5/156:00 amONT - SAN
1 stop6h 42mUnited Airlines
dom 5/196:15 amSAN - ONT
1 stop16h 49mUnited Airlines
Deal found 3/26$452
dom 4/146:00 amONT - SAN
1 stop14h 51mUnited Airlines
qua 4/171:50 pmSAN - ONT
1 stop9h 14mUnited Airlines
Deal found 3/27$495
ter 4/96:00 amONT - SAN
1 stop6h 47mUnited Airlines
qui 4/114:30 pmSAN - ONT
1 stop6h 34mUnited Airlines
Deal found 3/27$566
ter 9/175:15 amONT - SAN
2 stops16h 24mUnited Airlines
dom 9/227:09 amSAN - ONT
1 stop10h 13mUnited Airlines
Deal found 3/28$652
qua 4/2410:45 amONT - SAN
1 stop4h 12mUnited Airlines
sex 4/265:20 pmSAN - ONT
1 stop5h 44mUnited Airlines
Deal found 3/26$654

Cheap Ontario to San Diego flights in March & April 2024

Find cheap flight options from Ontario to San Diego specifically for the months of March and April 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 3,238,496 searches. Prices were last updated on março 28, 2024.
Scroll through some of the best deals on flights from Ontario to San Diego in 2024. Check back soon for alternative fares.
dom 4/79:41 pmONT - SAN
1 stop25h 46mMultiple Airlines
sex 4/1210:25 pmSAN - ONT
1 stop14h 56mMultiple Airlines
Deal found 3/27$112
qua 4/2412:39 pmONT - SAN
1 stop7h 42mMultiple Airlines
qua 5/19:32 pmSAN - ONT
1 stop9h 36mMultiple Airlines
Deal found 3/27$114
ter 4/2312:59 amONT - SAN
1 stop7h 25mMultiple Airlines
qua 5/111:37 amSAN - ONT
1 stop10h 20mMultiple Airlines
Deal found 3/27$122
ter 4/2312:59 amONT - SAN
1 stop7h 25mFrontier
qua 5/18:34 amSAN - ONT
2 stops8h 30mFrontier
Deal found 3/27$147
qua 4/2412:39 pmONT - SAN
1 stop6h 20mMultiple Airlines
qua 5/18:34 amSAN - ONT
2 stops8h 30mMultiple Airlines
Deal found 3/27$194
seg 4/19:55 pmONT - SAN
1 stop19h 11mMultiple Airlines
ter 4/210:28 pmSAN - ONT
1 stop9h 42mMultiple Airlines
Deal found 3/27$206
seg 4/13:35 pmONT - SAN
1 stop4h 40mFrontier
ter 4/27:32 pmSAN - ONT
2 stops11h 05mFrontier
Deal found 3/27$295
dom 4/75:42 pmONT - SAN
1 stop5h 45mMultiple Airlines
sex 4/128:44 amSAN - ONT
2 stops9h 11mMultiple Airlines
Deal found 3/27$317
sex 4/267:59 pmONT - SAN
1 stop12h 51mAlaska Airlines
sex 5/32:00 pmSAN - ONT
1 stop9h 59mAlaska Airlines
Deal found 3/27$347

Ontario to San Diego 2024 flight deals

Discover exclusive flight deals for travel between Ontario and San Diego in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 3,238,496 searches. Data last updated março 28, 2024.
Scroll through some of the best deals on flights from Ontario to San Diego in 2024. Check back soon for alternative fares.
dom 4/79:41 pmONT - SAN
1 stop25h 46mMultiple Airlines
sex 4/1210:25 pmSAN - ONT
1 stop14h 56mMultiple Airlines
Deal found 3/27$112
qua 4/2412:39 pmONT - SAN
1 stop7h 42mMultiple Airlines
qua 5/19:32 pmSAN - ONT
1 stop9h 36mMultiple Airlines
Deal found 3/27$114
ter 4/2312:59 amONT - SAN
1 stop7h 25mMultiple Airlines
qua 5/111:37 amSAN - ONT
1 stop10h 20mMultiple Airlines
Deal found 3/27$122
ter 4/2312:59 amONT - SAN
1 stop7h 25mFrontier
qua 5/18:34 amSAN - ONT
2 stops8h 30mFrontier
Deal found 3/27$147
qua 4/2412:39 pmONT - SAN
1 stop6h 20mMultiple Airlines
qua 5/18:34 amSAN - ONT
2 stops8h 30mMultiple Airlines
Deal found 3/27$194
dom 5/196:09 pmONT - SAN
1 stop5h 44mMultiple Airlines
dom 5/267:58 pmSAN - ONT
1 stop13h 16mMultiple Airlines
Deal found 3/28$197
seg 4/19:55 pmONT - SAN
1 stop19h 11mMultiple Airlines
ter 4/210:28 pmSAN - ONT
1 stop9h 42mMultiple Airlines
Deal found 3/27$206
seg 4/13:35 pmONT - SAN
1 stop4h 40mFrontier
ter 4/27:32 pmSAN - ONT
2 stops11h 05mFrontier
Deal found 3/27$295
dom 4/75:42 pmONT - SAN
1 stop5h 45mMultiple Airlines
sex 4/128:44 amSAN - ONT
2 stops9h 11mMultiple Airlines
Deal found 3/27$317

Ontario to San Diego flights leaving soon

Find last-minute flight options from Ontario to San Diego for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 3,238,496 searches. Data last updated março 28, 2024.
Have a look at some of the last-minute flights available departing from Ontario to San Diego. To prevent any unwanted surprises, users should verify their flight info before booking.
dom 4/79:41 pmONT - SAN
1 stop25h 46mMultiple Airlines
sex 4/1210:25 pmSAN - ONT
1 stop14h 56mMultiple Airlines
Deal found 3/27$112
dom 4/75:42 pmONT - SAN
1 stop5h 45mMultiple Airlines
sex 4/128:44 amSAN - ONT
2 stops9h 11mMultiple Airlines
Deal found 3/27$317
qui 4/410:45 amONT - SAN
1 stop10h 06mUnited Airlines
sex 4/126:49 pmSAN - ONT
1 stop17h 51mUnited Airlines
Deal found 3/28$877
qui 4/410:00 amONT - SAN
1 stop5h 26mAmerican Airlines
sex 4/1212:45 pmSAN - ONT
1 stop6h 04mAmerican Airlines
Deal found 3/28$895
sáb 4/610:00 amONT - SAN
1 stop5h 26mAmerican Airlines
ter 4/96:20 amSAN - ONT
1 stop5h 30mAmerican Airlines
Deal found 3/27$908
qui 4/46:00 amONT - SAN
1 stop17h 59mAlaska Airlines
sáb 4/66:15 amSAN - ONT
1 stop17h 44mAlaska Airlines
Deal found 3/27$1,107

One-way flights to San Diego from Ontario

Search for one-way flight options from Ontario to San Diego. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 3,238,496 searches. Data last updated março 28, 2024.
Users traveling one-way from Ontario to San Diego can select one of these great deals. Those seeking round-trip flights from Ontario to San Diego should utilize the search form at the the top of the page.
dom 4/79:41 pmONT - SAN
1 stop25h 46mMultiple Airlines
Deal found 3/27$63
ter 4/210:08 pmONT - SAN
1 stop23h 24mMultiple Airlines
Deal found 3/27$68
seg 4/19:55 pmONT - SAN
1 stop19h 11mFrontier
Deal found 3/27$101
dom 3/315:42 pmONT - SAN
1 stop26h 33mFrontier
Deal found 3/27$111
ter 4/210:08 pmONT - SAN
2 stops15h 35mMultiple Airlines
Deal found 3/27$135
dom 4/79:41 pmONT - SAN
2 stops16h 02mFrontier
Deal found 3/27$148
qua 5/16:00 amONT - SAN
1 stop6h 47mUnited Airlines
Deal found 3/28$153
qui 5/25:00 pmONT - SAN
1 stop6h 58mAlaska Airlines
Deal found 3/27$181
ter 6/251:50 pmONT - SAN
1 stop10h 09mUnited Airlines
Deal found 3/28$189

Find flights from Ontario to San Diego within your budget

Customize your flight search to find flights from Ontario to San Diego that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 3,238,496 searches. Data last updated março 28, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$112 - $382

Route

Depart

Return

Price

OntarioSan Diego

ONT - SAN

ONTSAN

Ontario

dom 4/7

1 stop25h 46m

San Diego

sex 4/12

1 stop14h 56m

$112

OntarioSan Diego

ONT - SAN

ONTSAN

Ontario

qua 4/24

1 stop7h 42m

San Diego

qua 5/1

1 stop9h 36m

$114

OntarioSan Diego

ONT - SAN

ONTSAN

Ontario

ter 4/23

1 stop7h 25m

San Diego

qua 5/1

1 stop10h 20m

$122

OntarioSan Diego

ONT - SAN

ONTSAN

Ontario

ter 4/23

1 stop7h 25m

San Diego

qua 5/1

2 stops8h 30m

$147

OntarioSan Diego

ONT - SAN

ONTSAN

Ontario

qua 4/24

1 stop6h 20m

San Diego

qua 5/1

2 stops8h 30m

$194

OntarioSan Diego

ONT - SAN

ONTSAN

Ontario

dom 5/19

1 stop5h 44m

San Diego

dom 5/26

1 stop13h 16m

$197

OntarioSan Diego

ONT - SAN

ONTSAN

Ontario

sex 4/26

1 stop12h 51m

San Diego

sex 5/3

1 stop9h 59m

$347

OntarioSan Diego

ONT - SAN

ONTSAN

Ontario

sáb 4/20

1 stop7h 34m

San Diego

qua 4/24

1 stop5h 44m

$374

OntarioSan Diego

ONT - SAN

ONTSAN

Ontario

sáb 4/27

1 stop6h 40m

San Diego

sáb 5/4

1 stop9h 50m

$382

Flights are sorted by cheapest first

Deals found on 3/27

No data available for this route at this time. Please check back soon.

Average price of flights to San Diego by month

Plan your trip from Ontario to San Diego by taking into account the cheapest months to travel. The average price of a one-way flight from Ontario to San Diego is currently $128 while a round-trip flight costs $221. Price data was last updated on March 24, 2024.

Currently, October is the cheapest month in which you can book a flight from Ontario to San Diego (average of $288). Flying from Ontario to San Diego in June is currently the most expensive (average of $376). 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.

January

$292

February

$297

March

$339

April

$325

May

$328

June

$376

July

$368

August

$313

September

$300

October

$288

November

$334

December

$305

Temperature and rainfall in San Diego by month

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

SAN

Temperature

57.2 - 71.6 °F

Reviews of airlines servicing San Diego

Get insights into the airlines that provide service to San Diego. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to San Diego. Reviews last updated março 28, 2024.
Get a feel of what it's like to fly with Alaska Airlines, United Airlines and American Airlines from Ontario to San Diego by reading reviews from past customers. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
8.1
Very good
9,127 reviews

Food

7.3

Entertainment

7.4

Boarding

8.2

Crew

8.6

Overall

8.1

Comfort

7.9

Reviews

1 / 10

I would have liked flying out of the airport I chose not a different airport. My flight was moved to San Jose

8.1
Very good
9,127 reviews
8.1
Very good
9,127 reviews

Food

7.3

Entertainment

7.4

Boarding

8.2

Crew

8.6

Overall

8.1

Comfort

7.9

Reviews

1 / 10

I would have liked flying out of the airport I chose not a different airport. My flight was moved to San Jose

7.4
Good
11,481 reviews
8.1
Very good
9,127 reviews

Food

7.3

Entertainment

7.4

Boarding

8.2

Crew

8.6

Overall

8.1

Comfort

7.9

Reviews

1 / 10

I would have liked flying out of the airport I chose not a different airport. My flight was moved to San Jose

7.3
Good
15,202 reviews
8.1
Very good
9,127 reviews

Food

7.3

Entertainment

7.4

Boarding

8.2

Crew

8.6

Overall

8.1

Comfort

7.9

Reviews

1 / 10

I would have liked flying out of the airport I chose not a different airport. My flight was moved to San Jose

6.3
Okay
4,267 reviews
8.1
Very good
9,127 reviews

Food

7.3

Entertainment

7.4

Boarding

8.2

Crew

8.6

Overall

8.1

Comfort

7.9

Reviews

1 / 10

I would have liked flying out of the airport I chose not a different airport. My flight was moved to San Jose

Related info for your journey

Find useful and relevant information for your journey from Ontario to San Diego. 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 Ontario to San Diego for under $200 on Cheapflights?

    Yes, there are multiple flights from Ontario to San Diego for under $200. The cheapest flight booked recently is on Multiple Airlines for just $112, but on average you can expect to pay $356.

  • Are there last-minute flights available from Ontario to San Diego for under $200?

    There are currently 6+ open flights from Ontario to San Diego within the next 7 days for less than $200.

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

    Cheapflights users have booked flights from Ontario to San Diego round-trip from $147. Other airlines that can offer you cheap pricing are Alaska Airlines, from $347, and United Airlines, from $374. These flights start at 89% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from Ontario to San Diego one-way?

    To fly one-way, consider booking your trip with Frontier, which is currently one of the cheapest options available, starting at $101. United Airlines flights start at $153 while deals on Alaska Airlines start at $181 one-way.

  • What does ONT to SAN mean?

    These are just IATA (International Air Transport Association) codes. They are used in aviation to identify and differentiate airports. That’s why a Ontario Airport to San Diego Airport flight would often be abbreviated as a ONT to SAN flight.

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

    The amount of baggage you can bring 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 Ontario to San Diego with specific airlines?

    Yes, Cheapflights allows you to browse and filter 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 Ontario to San Diego that include hotel bookings?

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

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

    After entering your origin and destination, apply the non-stop filter on the search result page to see available direct flights.

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

    Yes. Cheapflights offers flight deals from Ontario to San Diego 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 Ontario to San Diego that allow pets onboard?

    Many airlines do 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.

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

    The Ontario to San Diego flight deals you see on this page were last updated on 3/28.

See more FAQs

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

Search flights from Ontario to San Diego by cabin class

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

Weekly flight availability from Ontario to San Diego

Explore weekly flight availability from Ontario to San Diego. 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 março 28, 2024.
Sunday0daily flights
Monday0daily flights
Tuesday0daily flights
Wednesday0daily flights
Thursday0daily flights
Friday0daily flights
Saturday1daily flight

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Ontario to San Diego?

Cheapflights makes it easy to find Ontario to San Diego flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Ontario to San Diego?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to San Diego from Ontario.

Can Cheapflights find flights from Ontario to San Diego with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Ontario to San Diego flexibly with Cheapflights today.

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

Not ready to book yet? You can track prices for flights from Ontario to San Diego on Cheapflights with our Price Alert feature and get notified when better prices are available.

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

Yes, you can often find last-minute deals on Ontario to San Diego 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 can I compare prices from different travel booking sites for flights from Ontario to San Diego?

Cheapflights aggregates prices from various travel booking sites. This allows you to compare prices and choose the best deal.

Can I find deals for flights from Ontario to San Diego that offer flexible cancellation policies?

Cancellation policies vary by airline and fare type. After entering your flight details, you can view the cancellation policies for each deal in the search results. Some deals may offer flexibility in terms of cancellation and changes.

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