Cheap flights from Ontario (ONT) from $60

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Fly to

Route

Depart

Return

Price

Cheapest one-way

Quickest one-way

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Tue 4/7

1:09 pm-2:19 pm

Nonstop1h 10m

$29

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Tue 4/14

7:44 pm-8:54 pm

Nonstop1h 10m

$32

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Sat 4/25

5:55 pm-8:57 pm

Nonstop3h 02m

$90

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Sun 4/26

6:00 am-10:39 am

1 stop4h 39m

$100

OntarioHouston

ONT - HOU

ONTHOU

Ontario

Sat 4/18

11:50 am-4:55 pm

Nonstop3h 05m

$119

OntarioHouston

ONT - HOU

ONTHOU

Ontario

Sat 4/18

6:00 am-1:50 pm

1 stop5h 50m

$124

OntarioHouston

ONT - HOU

ONTHOU

Ontario

Tue 4/21

10:15 pm-9:58 am

1 stop9h 43m

$129

OntarioNew York

ONT - JFK

ONTJFK

Ontario

Sat 4/18

6:15 am-8:05 pm

2 stops10h 50m

$146

OntarioHouston

ONT - HOU

ONTHOU

Ontario

Fri 5/8

11:59 pm-9:26 am

1 stop7h 27m

$149

OntarioHonolulu

ONT - HNL

ONTHNL

Ontario

Wed 4/8

11:05 am-7:49 pm

2 stops11h 44m

$164

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

Where can I directly fly to from Ontario?

Currently, 15 destinations can be reached directly via flights from Ontario.

Flights from Ontario to

Atlanta

from$148

Flights from Ontario to

Boise

from$137

Flights from Ontario to

Honolulu

from$227

Flights from Ontario to

Las Vegas

from$53

Flights from Ontario to

León, Guanajuato

from$57

Flights from Ontario to

Morelia

from$39

Flights from Ontario to

Nashville

from$204

Flights from Ontario to

Oakland, California

from$111

Flights from Ontario to

Portland

from$153

Flights from Ontario to

San Francisco

from$66

Flights from Ontario to

San Jose, California

from$48

Flights from Ontario to

San José del Cabo

from$40

Flights from Ontario to

San Salvador

from$158

Flights from Ontario to

Santa Rosa

from$68

Flights from Ontario to

Seattle

from$99

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.

1:09 pm - 2:19 pm

ONT

LAS

1h 10mnonstop

$29Frontier

Tue, Apr 7

7:44 pm - 8:54 pm

ONT

LAS

1h 10mnonstop

$32Frontier

Tue, Apr 14

5:55 pm - 8:57 pm

ONT

SEA

3h 02mnonstop

$90Delta

Sat, Apr 25

6:00 am - 10:39 am

ONT

SEA

4h 39m

1 stop

$100United Airlines

Sun, Apr 26

11:50 am - 4:55 pm

ONT

HOU

3h 05mnonstop

$119Southwest

Sat, Apr 18

6:00 am - 1:50 pm

ONT

HOU

5h 50m

1 stop

$124Southwest

Sat, Apr 18

10:15 pm - 9:58 am

ONT

HOU

9h 43m

1 stop

$129Delta

Tue, Apr 21

6:15 am - 8:05 pm

ONT

JFK

10h 50m

2 stops

$146American Airlines

Sat, Apr 18

11:59 pm - 9:26 am

ONT

HOU

7h 27m

1 stop

$149American Airlines

Fri, May 8

11:05 am - 7:49 pm

ONT

HNL

11h 44m

2 stops

$164United Airlines

Wed, Apr 8

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?

According to searches, the most popular destinations for domestic flights from Ontario among momondo users are San Jose, California, Denver, Salt Lake City, Phoenix and New York.

What are the cheapest cities to fly to from Ontario?

The cheapest city to fly to from Ontario currently is Morelia at $39. The next cheapest destinations are San José del Cabo, San Jose, Las Vegas, León 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 JetBlue, Frontier, and Alaska Airlines. For example, JetBlue flights from Ontario to Las Vegas, start at $24, Frontier flights from Ontario to San Jose, California cost around $34, and Alaska Airlines flights from Ontario to San Francisco are around $36.

What is the cheapest flight available from Ontario?

Currently, the cheapest flight from Ontario found by our users is for $39 to Morelia. Prices will vary according to several factors such as the departure date and time, but on average you can expect to pay around $138 to travel from Ontario to Morelia.

Which destinations have the most frequent flights from Ontario?

Seattle, Dallas/Fort Worth Airport and Phoenix Sky Harbor Intl Airport are currently the destinations served most frequently from Ontario, with 16, 15 and 12 flights per day on average, respectively.

Which airlines can you fly with from Ontario?

Airlines including American Airlines, China Airlines and Alaska 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 Denver, for which the starting price of a first class seat can be as low as $427.

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 March 2026, 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.