Which airports can I use when flying from San Diego to Ontario?

Flights from San Diego to Ontario usually depart from San Diego (SAN) and arrive at Ontario (ONT).

What cabin classes can I book on flights from San Diego to Ontario?

Only Economy Class is available on flights from San Diego to Ontario.

Which airports do connecting flights from San Diego to Ontario pass through?

Most connecting flights from San Diego to Ontario pass through San Francisco (SFO), which handles 100% of one-stop traffic on this route. Other layover airports each see under 5%.

Can I save money by using flexible dates for flights from San Diego to Ontario?

Yes. Being flexible with your travel dates can save you up to 33% on the San Diego to Ontario route. Tuesday is the cheapest departure day at $450 round-trip on average, while Monday is the most expensive at $663, a difference of $213. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

What popular places can I visit in Ontario?

Some of the most popular sights in Ontario are Ontario Convention Center, Ontario Mills and Cucamonga-Guasti Regional Park. These are among the most viewed places in Ontario on KAYAK.

Do I need a passport to fly from San Diego to Ontario?

No, a passport is not required for this domestic route, but you will need a real ID-compliant driver's license, a state ID, or another TSA-accepted form of identification.

Have flight prices from San Diego to Ontario changed much recently?

Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $120 to $986. That means the highest observed fare was about 8x higher than the lowest one.

How are flight prices from San Diego to Ontario looking right now?

One-way fares from San Diego to Ontario are currently lower than usual. Average one-way flight prices are about $69, which is 50% below the typical average for this route.

What car rental options are available at Ontario Airport (ONT)?

Ontario Airport (ONT) hosts 5 major car rental companies, with daily rates starting from around $18 for economy cars. Top options include: · Fox · Thrifty · Europcar · Dollar · Alamo

How much should I expect to pay for a San Diego to Ontario flight?

Round-trip flights from San Diego to Ontario range from $450 to $643, with an average of $463 over the past 12 months. Anything below $450 counts as a good deal.

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

Frontier ($120) offered the cheapest round-trip ticket from San Diego to Ontario in the last 5 days.

What is the cheapest layover airport when flying from San Diego to Ontario?

Flights via San Francisco (SFO) offer the most affordable fares, with an average round-trip price of $589. Based on KAYAK data over the past 3 months.

When flying from San Diego to Ontario which airport offers the shortest layover?

San Francisco (SFO) had the shortest average connection time for San Diego to Ontario layovers at 331 minutes over the past 3 months.

$51 CHEAP FLIGHTS from San Diego to Ontario (SAN - ONT)

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Cheapest round-trip

$120

Typical prices: $450-$643

Frontier

Mon 9/24Fri 9/28

SAN - ONT • 1 stop

Cheapest one-way

$51

Typical prices: $137-$175

Frontier

Mon 10/1

SAN - ONT • 1 stop

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Flight Deals

Cheap Flights from San Diego to Ontario (SAN-ONT)

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Recent round-trip flight deals from San Diego to Ontario

Thu, Sep 24 - Mon, Sep 28

10:28 am - 7:36 pmSAN San Diego-ONT Ontario

9h 08m1 stop San Francisco

12:07 pm - 6:19 pmONT Ontario-SAN San Diego

6h 12m1 stop San Francisco

$120Frontier

Mon, Oct 12 - Thu, Oct 22

8:34 pm - 9:09 amSAN San Diego-ONT Ontario

12h 35m1 stop Las Vegas Harry Reid Intl

12:01 pm - 6:06 pmONT Ontario-SAN San Diego

6h 05m1 stop San Francisco

$132Frontier

Tue, Sep 22 - Tue, Sep 29

4:54 pm - 10:30 amSAN San Diego-ONT Ontario

17h 36m1 stop Denver Intl

11:45 am - 11:51 pmONT Ontario-SAN San Diego

12h 06m1 stop Denver Intl

$140Frontier

Thu, Sep 24 - Mon, Sep 28

10:28 am - 7:36 pmSAN San Diego-ONT Ontario

9h 08m1 stop San Francisco

8:24 pm - 6:19 pmONT Ontario-SAN San Diego

21h 55m2 stops Las Vegas Harry Reid Intl San Francisco

$141Frontier

Mon, Oct 12 - Mon, Oct 19

8:34 pm - 9:09 amSAN San Diego-ONT Ontario

12h 35m1 stop Las Vegas Harry Reid Intl

12:01 pm - 6:06 pmONT Ontario-SAN San Diego

6h 05m1 stop San Francisco

$142Frontier

Sat, Sep 19 - Sat, Sep 26

4:54 pm - 11:47 pmSAN San Diego-ONT Ontario

6h 53m1 stop Denver Intl

10:04 am - 4:59 pmONT Ontario-SAN San Diego

6h 55m1 stop Las Vegas Harry Reid Intl

$145Frontier

Sat, Sep 19 - Sat, Sep 26

4:54 pm - 11:47 pmSAN San Diego-ONT Ontario

6h 53m1 stop Denver Intl

10:04 am - 6:19 pmONT Ontario-SAN San Diego

8h 15m2 stops Las Vegas Harry Reid Intl San Francisco

$153Frontier

Wed, Sep 23 - Sat, Sep 26

6:25 am - 11:47 pmSAN San Diego-ONT Ontario

17h 22m1 stop Denver Intl

6:15 am - 3:58 pmONT Ontario-SAN San Diego

9h 43m1 stop Denver Intl

$157Frontier

Mon, Sep 21 - Mon, Sep 28

6:25 am - 11:47 pmSAN San Diego-ONT Ontario

17h 22m1 stop Denver Intl

12:07 pm - 6:19 pmONT Ontario-SAN San Diego

6h 12m1 stop San Francisco

$160Frontier

Sat, Nov 7 - Sat, Nov 14

4:53 pm - 11:51 pmSAN San Diego-ONT Ontario

6h 58m1 stop Denver Intl

10:00 am - 6:38 pmONT Ontario-SAN San Diego

8h 38m2 stops Las Vegas Harry Reid Intl San Francisco

$161Frontier

Booking Insights

Price, demand and travel trends for San Diego to Ontario flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights from San Diego to Ontario with more confidence.

Prices

Airlines

Layovers

How much is a round-trip flight from San Diego to Ontario?

Round-trip flights from San Diego to Ontario start at $120. Prices are below average for this route right now, with typical round-trip fares ranging from $450 to $643. The lowest price found in the past 5 days was $120 on Frontier.

Find deals

Cheapest flight	$51

Flight from San Diego to Ontario

When to book flights from San Diego to Ontario

Are your dates flexible? Find out the best times to travel from San Diego to Ontario based on our flight data from the last year. Discover the cheapest month and even day to fly.

Estimated round-trip price

KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

Which airports can I use when flying from San Diego to Ontario?
Flights from San Diego to Ontario usually depart from San Diego (SAN) and arrive at Ontario (ONT).
What cabin classes can I book on flights from San Diego to Ontario?
Only Economy Class is available on flights from San Diego to Ontario.
Which airports do connecting flights from San Diego to Ontario pass through?
Most connecting flights from San Diego to Ontario pass through San Francisco (SFO), which handles 100% of one-stop traffic on this route. Other layover airports each see under 5%.
Can I save money by using flexible dates for flights from San Diego to Ontario?
Yes. Being flexible with your travel dates can save you up to 33% on the San Diego to Ontario route. Tuesday is the cheapest departure day at $450 round-trip on average, while Monday is the most expensive at $663, a difference of $213. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.
What popular places can I visit in Ontario?
Some of the most popular sights in Ontario are Ontario Convention Center, Ontario Mills and Cucamonga-Guasti Regional Park. These are among the most viewed places in Ontario on KAYAK.
Do I need a passport to fly from San Diego to Ontario?
No, a passport is not required for this domestic route, but you will need a real ID-compliant driver's license, a state ID, or another TSA-accepted form of identification.
Have flight prices from San Diego to Ontario changed much recently?
Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $120 to $986. That means the highest observed fare was about 8x higher than the lowest one.
How are flight prices from San Diego to Ontario looking right now?
One-way fares from San Diego to Ontario are currently lower than usual. Average one-way flight prices are about $69, which is 50% below the typical average for this route.
What car rental options are available at Ontario Airport (ONT)?
Ontario Airport (ONT) hosts 5 major car rental companies, with daily rates starting from around $18 for economy cars. Top options include:
· Fox
· Thrifty
· Europcar
· Dollar
· Alamo
How much should I expect to pay for a San Diego to Ontario flight?
Round-trip flights from San Diego to Ontario range from $450 to $643, with an average of $463 over the past 12 months. Anything below $450 counts as a good deal.

If your dates can be flexible, aim for a Tuesday departure instead of Monday. On this route, Tuesday flights average $450 - about $213 less than Monday (32% savings) based on the last 12 months.
If you're arriving late at night and need somewhere to stay, check out these hotels close to Ontario Airport.
- Azure Hotel & Suites, Trademark Collection by Wyndham
- La Quinta Inn & Suites by Wyndham Ontario Airport
- Holiday Inn Ontario Airport By IHG

Everything you need to know for your flight from San Diego to Ontario

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San Diego (SAN)

Ontario (ONT)

SAN - ONT

$51 Find Cheap Flights from San Diego to Ontario - Compare and Save

Everything you should know

Cheap Flights from San Diego to Ontario (SAN-ONT)

Recent round-trip flight deals from San Diego to Ontario

Recent one-way flight deals from San Diego to Ontario

Recent last minute flight deals from San Diego to Ontario

Price, demand and travel trends for San Diego to Ontario flights

How much is a round-trip flight from San Diego to Ontario?

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

What is the cheapest layover airport when flying from San Diego to Ontario?

When flying from San Diego to Ontario which airport offers the shortest layover?

Key details for San Diego to Ontario flights

Cheapest flight

When to book flights from San Diego to Ontario

Your San Diego to Ontario flight questions, answered

Your guide to booking San Diego to Ontario flights

Everything you need to know for your flight from San Diego to Ontario

Information on your arrival and departure airports

Cabin class types available on flights from San Diego to Ontario

Complete your trip to Ontario with a hotel stay or car rental

Find direct flights to and from San Diego and Ontario

Flights to other popular destinations

Flights from domestic origins to Ontario

Choose which airport to fly into in Ontario

Find deals for your return flight