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Fly to
Route
Depart
Return
OntarioLas Vegas
ONT - LAS
ONTLAS
Ontario
Sat 11/8
1:37 pm-2:55 pm
Nonstop1h 18m
OntarioLas Vegas
ONT - LAS
ONTLAS
Ontario
Thu 1/29
6:30 am-7:37 am
Nonstop1h 07m
OntarioSan Francisco
ONT - SFO
ONTSFO
Ontario
Mon 12/15
1:50 pm-3:14 pm
Nonstop1h 24m
OntarioLas Vegas
ONT - LAS
ONTLAS
Ontario
Tue 1/13
9:00 pm-10:05 pm
Nonstop1h 05m
OntarioSan Francisco
ONT - SFO
ONTSFO
Ontario
Mon 1/12
1:53 pm-3:25 pm
Nonstop1h 32m
OntarioLas Vegas
ONT - LAS
ONTLAS
Ontario
Thu 12/25
6:15 pm-10:00 pm
1 stop3h 45m
OntarioSeattle
ONT - SEA
ONTSEA
Ontario
Mon 12/15
6:40 am-9:45 am
Nonstop3h 05m
OntarioDallas
ONT - DFW
ONTDFW
Ontario
Wed 1/14
7:16 am-12:15 pm
Nonstop2h 59m
OntarioSeattle
ONT - SEA
ONTSEA
Ontario
Wed 11/5
4:35 pm-10:23 pm
1 stop5h 48m
OntarioHouston
ONT - IAH
ONTIAH
Ontario
Sun 11/16
11:59 pm-8:42 am
1 stop6h 43m
Our data suggests that currently, the cheapest flights from Ontario are being offered by Frontier, Alaska Airlines, and Delta. For example, Frontier flights from Ontario to Las Vegas, start at $24, Alaska Airlines flights from Ontario to San Francisco cost around $36, and Delta flights from Ontario to San Jose, California are around $39.
Currently, the cheapest flight from Ontario found by our users is for $36 to Las Vegas. Prices will vary according to several factors such as the departure date and time, but on average you can expect to pay around $150 to travel from Ontario to Las Vegas.
Dallas/Fort Worth Airport, Seattle and Atlanta are currently the destinations served most frequently from Ontario, with 18, 16 and 13 flights per day on average, respectively.
Airlines including American Airlines, Delta and China Airlines frequently fly from Ontario. You can view other airlines by performing a quick search in the form above.
If you are looking for a cheap first class flight, consider flights to Seattle, for which the starting price of a first class seat can be as low as $467.
Prices for flights from Ontario Airport refresh daily.
As of October 2025, there are 32 operators available to choose from for flights from Ontario Airport.
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Ontario Airport.
The required travel and health documents for your Ontario Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Ontario Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.