Cheap flights from Ontario (ONT) from $59

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Fly to

Route

Depart

Return

Price

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Sun 2/22

3:24 pm-4:36 pm

Nonstop1h 12m

$30

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Wed 2/11

7:17 pm-8:26 pm

Nonstop1h 09m

$31

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Wed 3/11

10:03 pm-11:14 pm

Nonstop1h 11m

$32

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Fri 2/27

4:46 pm-6:01 pm

Nonstop1h 15m

$34

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Fri 2/27

4:46 pm-6:01 pm

Nonstop1h 15m

$35

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Thu 3/5

7:22 pm-8:31 pm

Nonstop1h 09m

$36

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Sun 2/8

8:55 am-5:50 pm

1 stop8h 55m

$76

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Mon 2/9

1:46 pm-11:56 am

1 stop19h 10m

$81

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Tue 2/10

7:00 am-11:33 am

1 stop4h 33m

$89

OntarioNewark

ONT - EWR

ONTEWR

Ontario

Tue 2/24

8:35 am-6:53 am

2 stops19h 18m

$97

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

Where can I directly fly to from Ontario?

Currently, 12 destinations can be reached directly via flights from Ontario.

Flights from Ontario to

Boise

from$97

Flights from Ontario to

Honolulu

from$163

Flights from Ontario to

Las Vegas

from$42

Flights from Ontario to

León, Guanajuato

from$60

Flights from Ontario to

Morelia

from$41

Flights from Ontario to

Portland

from$108

Flights from Ontario to

Sacramento

from$96

Flights from Ontario to

Salt Lake City

from$69

Flights from Ontario to

San Francisco

from$69

Flights from Ontario to

San José del Cabo

from$41

Flights from Ontario to

San Salvador

from$113

Flights from Ontario to

Seattle

from$79

Find the cheapest flights from Ontario

One-way

Last minute

International

Domestic

Cheap one-way flights from Ontario

Enter your travel dates to find the best prices.

3:24 pm - 4:36 pm

ONT

LAS

1h 12mnonstop

$30Frontier

Sun, Feb 22

7:17 pm - 8:26 pm

ONT

LAS

1h 09mnonstop

$31Frontier

Wed, Feb 11

10:03 pm - 11:14 pm

ONT

LAS

1h 11mnonstop

$32Frontier

Wed, Mar 11

4:46 pm - 6:01 pm

ONT

LAS

1h 15mnonstop

$34Frontier

Fri, Feb 27

4:46 pm - 6:01 pm

ONT

LAS

1h 15mnonstop

$35Frontier

Fri, Feb 27

7:22 pm - 8:31 pm

ONT

LAS

1h 09mnonstop

$36Frontier

Thu, Mar 5

8:55 am - 5:50 pm

ONT

SEA

8h 55m

1 stop

$76Southwest

Sun, Feb 8

1:46 pm - 11:56 am

ONT

MIA

19h 10m

1 stop

$81Multiple Airlines

Mon, Feb 9

7:00 am - 11:33 am

ONT

SEA

4h 33m

1 stop

$89Alaska Airlines

Tue, Feb 10

8:35 am - 6:53 am

ONT

EWR

19h 18m

2 stops

$97Multiple Airlines

Tue, Feb 24

Flights from Ontario - Travel Insights & Trends

Get data-powered insights and trends into flights from Ontario to help you craft the best travel plan.

Prices

Other information

What are the most popular domestic flights out of Ontario?

Departing from Ontario, the top domestic flight destinations, based on momondo users' searches, include Seattle, Denver, Honolulu, Portland, and Phoenix.

What are the cheapest cities to fly to from Ontario?

The cheapest city to fly to from Ontario currently is San José del Cabo at $41. The next cheapest destinations are Morelia, Las Vegas, León, Salt Lake City and San Francisco.

Frequently asked questions regarding flights from Ontario

Which airlines are currently offering the cheapest flights from Ontario?

Our data suggests that currently, the cheapest flights from Ontario are being offered by Frontier, Alaska Airlines, and American Airlines. For example, Frontier flights from Ontario to Las Vegas, start at $27, Alaska Airlines flights from Ontario to San Francisco cost around $36, and American Airlines flights from Ontario to Newark Airport are around $48.

What is the cheapest flight available from Ontario?

Currently, the cheapest flight from Ontario found by our users is for $41 to San José del Cabo. Prices will vary according to several factors such as the departure date and time, but on average you can expect to pay around $124 to travel from Ontario to San José del Cabo.

Which destinations have the most frequent flights from Ontario?

Dallas/Fort Worth Airport, Seattle and Phoenix Sky Harbor Intl Airport are currently the destinations served most frequently from Ontario, with 14, 14 and 11 flights per day on average, respectively.

Which airlines can you fly with from Ontario?

Airlines including American Airlines, Delta and United Airlines frequently fly from Ontario. You can view other airlines by performing a quick search in the form above.

What is the cheapest first class flight from Ontario?

If you are looking for a cheap first class flight, consider flights to Atlanta, for which the starting price of a first class seat can be as low as $612.

When did momondo last update prices for flights from Ontario Airport?

Prices for flights from Ontario Airport refresh daily.

How many operators does momondo search for flights from Ontario Airport?

As of January 2026, there are 30 operators available to choose from for flights from Ontario Airport.

How old do you have to be to fly 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.

What documentation or ID do you need to fly to 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.