Cheap flights from Ontario (ONT) from $59

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Fly to

Route

Depart

Return

Price

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Wed 3/4

2:06 pm-3:20 pm

Nonstop1h 14m

$31

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Mon 4/6

5:24 pm-6:33 pm

Nonstop1h 09m

$32

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Sat 1/31

7:35 pm-8:44 pm

Nonstop1h 09m

$33

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Thu 1/29

7:30 am-10:36 am

Nonstop3h 06m

$70

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Sat 1/31

8:30 am-1:05 pm

1 stop4h 35m

$76

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Wed 2/4

11:53 am-2:44 pm

Nonstop2h 51m

$79

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Tue 2/3

5:10 pm-12:09 am

1 stop6h 59m

$80

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Thu 2/12

6:14 am-9:09 am

Nonstop2h 55m

$81

OntarioNew York

ONT - JFK

ONTJFK

Ontario

Wed 2/18

6:14 am-7:10 pm

1 stop9h 56m

$119

OntarioHouston

ONT - HOU

ONTHOU

Ontario

Wed 2/4

5:15 am-10:15 am

Nonstop3h 00m

$148

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

Where can I directly fly to from Ontario?

Currently, 13 destinations can be reached directly via flights from Ontario.

Flights from Ontario to

Austin

from$168

Flights from Ontario to

Boise

from$97

Flights from Ontario to

Honolulu

from$159

Flights from Ontario to

Las Vegas

from$40

Flights from Ontario to

León, Guanajuato

from$56

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$59

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.

2:06 pm - 3:20 pm

ONT

LAS

1h 14mnonstop

$31Frontier

Wed, Mar 4

5:24 pm - 6:33 pm

ONT

LAS

1h 09mnonstop

$32Frontier

Mon, Apr 6

7:35 pm - 8:44 pm

ONT

LAS

1h 09mnonstop

$33Frontier

Sat, Jan 31

7:30 am - 10:36 am

ONT

SEA

3h 06mnonstop

$70Delta

Thu, Jan 29

8:30 am - 1:05 pm

ONT

SEA

4h 35m1 stop

$76Southwest

Sat, Jan 31

11:53 am - 2:44 pm

ONT

SEA

2h 51mnonstop

$79Hawaiian Airlines

Wed, Feb 4

5:10 pm - 12:09 am

ONT

SEA

6h 59m1 stop

$80Delta

Tue, Feb 3

6:14 am - 9:09 am

ONT

SEA

2h 55mnonstop

$81Alaska Airlines

Thu, Feb 12

6:14 am - 7:10 pm

ONT

JFK

9h 56m1 stop

$119Alaska Airlines

Wed, Feb 18

5:15 am - 10:15 am

ONT

HOU

3h 00mnonstop

$148Southwest

Wed, Feb 4

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?

From Ontario, you can take domestic flights to many cities. Searches reveal that momondo users prefer flights to Portland, Denver, Phoenix, Honolulu, and San Jose, California the most.

What are the cheapest cities to fly to from Ontario?

The cheapest city to fly to from Ontario currently is Las Vegas at $40. The next cheapest destinations are San José del Cabo, Morelia, León, San Francisco and Houston.

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 $40 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 $163 to travel from Ontario to Las Vegas.

Which destinations have the most frequent flights from Ontario?

Dallas/Fort Worth Airport, Seattle and Atlanta are currently the destinations served most frequently from Ontario, with 13, 9 and 9 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.