Cheap flights from Ontario (ONT) from $60

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Fly to

Route

Depart

Return

Price

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Fri 1/30

8:48 pm-9:56 pm

Nonstop1h 08m

$35

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Sat 1/10

3:21 pm-4:27 pm

Nonstop1h 06m

$39

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Thu 1/8

10:18 pm-11:29 pm

Nonstop1h 11m

$40

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Thu 1/8

10:18 pm-11:29 pm

Nonstop1h 11m

$41

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Wed 1/21

7:30 am-10:36 am

Nonstop3h 06m

$70

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Sun 1/11

11:00 am-5:40 pm

1 stop6h 40m

$76

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Sat 1/17

5:50 am-8:05 am

Nonstop1h 15m

$80

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Mon 1/12

5:07 pm-11:22 pm

1 stop6h 15m

$80

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Tue 1/27

5:59 pm-10:33 pm

1 stop4h 34m

$88

OntarioNew York

ONT - JFK

ONTJFK

Ontario

Wed 1/21

6:00 am-9:00 pm

2 stops12h 00m

$99

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$137

Flights from Ontario to

Honolulu

from$189

Flights from Ontario to

Las Vegas

from$40

Flights from Ontario to

León, Guanajuato

from$56

Flights from Ontario to

Morelia

from$40

Flights from Ontario to

Portland

from$108

Flights from Ontario to

Sacramento

from$96

Flights from Ontario to

Salt Lake City

from$150

Flights from Ontario to

San Jose, California

from$96

Flights from Ontario to

San José del Cabo

from$40

Flights from Ontario to

San Salvador

from$120

Flights from Ontario to

Seattle

from$59

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.

8:48 pm - 9:56 pm

ONT

LAS

1h 08mnonstop

$35Frontier

Fri, Jan 30

3:21 pm - 4:27 pm

ONT

LAS

1h 06mnonstop

$39Frontier

Sat, Jan 10

10:18 pm - 11:29 pm

ONT

LAS

1h 11mnonstop

$40Frontier

Thu, Jan 8

10:18 pm - 11:29 pm

ONT

LAS

1h 11mnonstop

$41Frontier

Thu, Jan 8

7:30 am - 10:36 am

ONT

SEA

3h 06mnonstop

$70Delta

Wed, Jan 21

11:00 am - 5:40 pm

ONT

SEA

6h 40m1 stop

$76Southwest

Sun, Jan 11

5:50 am - 8:05 am

ONT

PHX

1h 15mnonstop

$80Southwest

Sat, Jan 17

5:07 pm - 11:22 pm

ONT

SEA

6h 15m1 stop

$80Delta

Mon, Jan 12

5:59 pm - 10:33 pm

ONT

SEA

4h 34m1 stop

$88Alaska Airlines

Tue, Jan 27

6:00 am - 9:00 pm

ONT

JFK

12h 00m2 stops

$99American Airlines

Wed, Jan 21

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, Honolulu, Dallas, and San Francisco 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 Morelia, San José del Cabo, León, San Francisco and Seattle.

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 $24, Alaska Airlines flights from Ontario to San Francisco cost around $35, 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 $151 to travel from Ontario to Las Vegas.

Which destinations have the most frequent flights from Ontario?

Seattle, Dallas/Fort Worth Airport and Atlanta are currently the destinations served most frequently from Ontario, with 16, 15 and 13 flights per day on average, respectively.

Which airlines can you fly with from Ontario?

Airlines including American Airlines, China Airlines and Delta 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 Seattle, for which the starting price of a first class seat can be as low as $467.

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 December 2025, there are 31 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.