Cheap flights from San Diego to Ontario from $243

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1 stop
Wed, Jul 23
San Diego SANOntario ONT

$243
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1 stop
Wed, Jul 23
San Diego SANOntario ONT

$243
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1 stop
Wed, Jul 23
San Diego SANOntario ONT

$243
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1 stop
Wed, Jul 23
San Diego SANOntario ONT

$253
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1 stop
Wed, Jul 23
San Diego SANOntario ONT

$253
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1 stop
Wed, Jul 23
San Diego SANOntario ONT

$253
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Prices updated:

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1 stop
Wed, Jul 23 – Sat, Jul 26
San Diego SANOntario ONT

$525
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1 stop
Wed, Jul 23 – Sat, Jul 26
San Diego SANOntario ONT

$525
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1 stop
Wed, Jul 23 – Sat, Jul 26
San Diego SANOntario ONT

$525
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1 stop
Wed, Jul 23 – Sat, Jul 26
San Diego SANOntario ONT

$535
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1 stop
Wed, Jul 23 – Fri, Jul 25
San Diego SANOntario ONT

$547
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1 stop
Wed, Jul 23 – Sun, Jul 27
San Diego SANOntario ONT

$570
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How much do flights to Ontario cost?

Key info about flying to Ontario

Depart from
San Diego International
Arrive to
Ontario International
Average flights per week
107
Flight distance
Worth visiting
Griffith Observatory

Check-in for a flight from San Diego to Ontario

NameCarrier codeIATA CodePassport needed during booking
United AirlinesUALUANo
Hawaiian AirlinesHALHANo
Alaska AirlinesASAASNo

Weather in Ontario

Average Weather

MonthAverage monthly max temperatureAverage monthly min temperature
January18°C7°C
February18°C7°C
March19°C8°C
April23°C10°C
May25°C12°C
June29°C16°C
July33°C19°C
August33°C20°C
September32°C18°C
October27°C15°C
November22°C10°C
December17°C7°C
Hottest Month
33°C
August
Coldest month
7°C
February
Sunny days
340
days per year

14 day forecast

Friday
4 Jul
32°C18°C
11 Jul
34°C21°C
Saturday
5 Jul
34°C19°C
12 Jul
32°C19°C
Sunday
6 Jul
32°C19°C
13 Jul
33°C19°C
Monday
7 Jul
31°C19°C
14 Jul
33°C19°C
Tuesday
8 Jul
35°C19°C
15 Jul
33°C19°C
Wednesday
9 Jul
36°C21°C
16 Jul
32°C20°C
Thursday
10 Jul
35°C22°C
17 Jul
31°C20°C
Travelers usually depart from San Diego International, or McClellan–Palomar when they travel from San Diego to Ontario. The most popular airlines for this route are United Airlines, Hawaiian Airlines, and Alaska Airlines. San Diego and Ontario have 107 direct flights per week.

Frequently asked questions

What are the most popular routes to and from San Diego?
What are the most popular routes to and from Ontario?
Which airports are there in San Diego?
What airports are near San Diego?
What airports are near Ontario?
Which airlines fly between San Diego and Ontario?
When’s the best time to travel between San Diego and Ontario?
What flights operate between San Diego and Ontario?
How many airports are there near San Diego?
How many airports are there near Ontario?
What time do nonstop (direct) flights between San Diego and Ontario depart?
What time do nonstop (direct) flights between San Diego and Ontario arrive?
What time do flights between San Diego and Ontario depart?
What time do flights between San Diego and Ontario arrive?

Explore alternative trips

Flights from San Diego

Flights to Ontario

Popular routes

The nearest countries with flights to Ontario

Here is a list of countries people are flying from

Other destination countries from San Diego

Here is a list of countries people are flying to

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