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Home / Ontario — San Diego

Cheap flights Ontario — San Diego

Ontario (ONT, US) San Diego (SAN, US)
from $275 155 km ~41m 2 flights found 2 airlines cheapest on Thursday
Reverse route
How many travellers?
Adults
12+ years
1
Children
2–11 years
0
Infants
under 2
0
Choose your departure date
Cheapest: $275 on 18.01.2027
Prices shown are from searches by other travellers over the last 24 hours. Missing a date? Click any day — we'll find tickets anyway.
November 2026
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December 2026
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January 2027
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Prices found for 1 of 90 days. Prices update as more travellers search. Click any date to search live.
Depart
—
Return
—
Cheapest flights found
18 Jan 2027, Mon
Southwest Airlines WN 4555
22:40
ONT Ontario International Airport
01:15
SAN San Diego International Airport
2h 35m 1 stop
Biletix
$275
View this ticket
Route characteristics
Distance
155 km
Flight time
41m
Time difference
+0h
Minimum price
from $275 (18.01.2027)
Average price
$275
Maximum price
$275
Cheapest day
Thursday
Departure airports (1)
ONT Ontario International Airport
Arrival airports (1)
SAN San Diego International Airport
Airlines (2)
F9 Frontier Airlines WN Southwest Airlines
Agencies (2)
Flightnetwork Biletix
Airlines — cheapest prices 2
Frontier Airlines
Frontier Airlines
Low-cost 1 flights · 1 days
$159
Southwest Airlines
Southwest Airlines
Low-cost 1 flights · 1 days
$275
Where to buy tickets 2
Flightnetwork
1 tickets · 1 days
from $159
Biletix
1 tickets · 1 days
from $275
Airports

From — Ontario (1)

  • ONT Ontario International Airport

To — San Diego (1)

  • SAN San Diego International Airport
Other destinations from Ontario
Albuquerque
US
Accra
GH
Nantucket
US
Adelaide
AU
San Andres Island
CO
Malaga
ES · Hub
Auckland
NZ
Almaty
KZ
Alicante
ES
Ahmedabad
IN
Amsterdam
NL · Hub
Anchorage
US
Frequently asked questions about the route Ontario — San Diego
How long is the flight from Ontario to San Diego?
Approximate flight time — 41m. This is an average for a direct flight. With connections, the time may be longer.
What is the distance from Ontario to San Diego?
The straight-line distance — 155 km.
How much do flights from Ontario to San Diego cost?
The minimum price over 3 months — from $275 on 18.01.2027.
What is the average ticket price?
The average price — $275. Range: $275 — $275.
What is the time difference between Ontario and San Diego?
The difference — +0h.
From which airports does Ontario operate flights?
From Ontario: ONT (Ontario International Airport).
To which airports in San Diego do flights arrive?
To San Diego: SAN (San Diego International Airport).
Which airlines fly this route?
This route is served by 2 airlines: Frontier Airlines, Southwest Airlines.
Which day of the week is cheapest?
The cheapest day of the week — Thursday.
When is the best time to buy tickets?
Optimal — 1–3 months before departure. Check the calendar above — it shows the best dates.
How do I book flights?
Click "View this ticket" on any flight card — you'll be redirected to the booking page with this specific ticket pre-selected.
About the route Ontario — San Diego

Flights Ontario — San Diego is a popular route. The straight-line distance is 155 km. Flight time 41m. Time difference +0h.

From Ontario (ONT) flights depart from 1 airport: ONT. To San Diego (SAN) — 1 arrival airport: SAN.

2 airlines operate on this route: Frontier Airlines, Southwest Airlines.

The minimum price for the next 3 months — from $275 (18.01.2027). The cheapest dates are highlighted in the calendar above.

The average ticket price — $275, ranging from $275 to $275. Book 1–3 months in advance to get the best deals.

Cheapest day to fly — Thursday.

Other destinations in United States from Ontario
Philadelphia
US
Oklahoma City
US
Omaha
US
Orlando
US
Everett
US
West Palm Beach
US
Portland
US
Palm Springs
US

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