Cheap flights from Ontario from $29

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario departing on 11/7. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Find flights from Ontario within your budget

 
Find flights departing from Ontario that match your specified budget. Filter results by price range, allowing you to narrow down options and find flights that fit within your financial constraints. Please note that the search results are based on data from user searches, with fares last updated on agosto 21, 2025. In the last 7 days, momondo users made a total of 832,500 searches

Fly to

Route

Depart

Return

Price

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

vie. 11/7

6:00 am-7:11 am

Nonstop1h 11m

$29

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

mié. 9/3

8:00 am-9:13 am

Nonstop1h 13m

$30

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

mar. 12/2

8:55 pm-9:55 pm

Nonstop1h 00m

$49

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

sáb. 12/6

5:20 pm-9:00 pm

1 stop3h 40m

$59

OntarioSan Francisco

ONT - SFO

ONTSFO

Ontario

jue. 9/25

1:53 pm-3:11 pm

Nonstop1h 18m

$66

OntarioSan Francisco

ONT - SFO

ONTSFO

Ontario

sáb. 9/20

6:50 pm-8:09 pm

Nonstop1h 19m

$69

OntarioDallas

ONT - DFW

ONTDFW

Ontario

mar. 10/7

11:59 pm-4:46 am

Nonstop2h 47m

$70

OntarioDallas

ONT - DFW

ONTDFW

Ontario

mar. 10/14

11:59 pm-4:46 am

Nonstop2h 47m

$71

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

sáb. 9/13

5:40 pm-8:31 pm

Nonstop2h 51m

$109

OntarioDenver

ONT - DEN

ONTDEN

Ontario

jue. 12/4

11:29 am-7:02 pm

1 stop6h 33m

$109

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

Find the cheapest flights from Ontario

Cheap one-way flights from Ontario

Frontier Logo
6:00 am - 7:11 amONT-LAS
1h 11mnonstop
$29Frontier
Find Deal
vie., nov. 7
Frontier Logo
8:00 am - 9:13 amONT-LAS
1h 13mnonstop
$30Frontier
Find Deal
mié., sep. 3
Southwest Logo
8:55 pm - 9:55 pmONT-LAS
1h 00mnonstop
$49Southwest
Find Deal
mar., dic. 2
Southwest Logo
5:20 pm - 9:00 pmONT-LAS
3h 40m1 stop
$59Southwest
Find Deal
sáb., dic. 6
United Airlines Logo
1:53 pm - 3:11 pmONT-SFO
1h 18mnonstop
$66United Airlines
Find Deal
jue., sep. 25
United Airlines Logo
6:50 pm - 8:09 pmONT-SFO
1h 19mnonstop
$69United Airlines
Find Deal
sáb., sep. 20
American Airlines Logo
11:59 pm - 4:46 amONT-DFW
2h 47mnonstop
$70American Airlines
Find Deal
mar., oct. 7
American Airlines Logo
11:59 pm - 4:46 amONT-DFW
2h 47mnonstop
$71American Airlines
Find Deal
mar., oct. 14
Delta Logo
5:40 pm - 8:31 pmONT-SEA
2h 51mnonstop
$109Delta
Find Deal
sáb., sep. 13
Delta Logo
11:29 am - 7:02 pmONT-DEN
6h 33m1 stop
$109Delta
Find Deal
jue., dic. 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.

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 Salt Lake City the most.

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 Stockton, start at $19, Alaska Airlines flights from Ontario to San Francisco cost around $35, and American Airlines flights from Ontario to Reno are around $37.

What is the cheapest flight available from Ontario?

Currently, the cheapest flight from Ontario found by our users is for $23 to León, Guanajuato. Prices will vary according to several factors such as the departure date and time, but on average you can expect to pay around $126 to travel from Ontario to León, Guanajuato.

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 16, 13 and 12 flights per day on average, respectively.

Which airlines can you fly with from Ontario?

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.

What is the cheapest first class flight from Ontario?

If you are looking for a cheap first class flight, consider flights to Phoenix Sky Harbor Intl Airport, for which the starting price of a first class seat can be as low as $385.

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?

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.

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mar. 8/26
mar. 9/2

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