ONT

Find cheap United Airlines flights to Ontario from $79

1 adult
1 adult, Economy, 0 bags

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Flight Deals

Cheap United Airlines Flight Deals to Ontario

 
Here are some of the best deals found on KAYAK recently from United Airlines to Ontario that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip United Airlines flight deals to Ontario

Sat, Jan 24 - Tue, Jan 27
United Airlines Logo
11:23 am - 12:47 pm
DEN
-
ONT
2h 24mnonstop
United Airlines Logo
5:05 am - 8:24 am
ONT
-
DEN
2h 19mnonstop
$157United Airlines
Wed, Feb 18 - Tue, Feb 24
United Airlines Logo
7:15 am - 12:48 pm
SEA
-
ONT
5h 33m1 stop
United Airlines Logo
1:50 pm - 9:01 pm
ONT
-
SEA
7h 11m1 stop
$177United Airlines
Wed, Feb 18 - Sat, Feb 21
United Airlines Logo
11:20 am - 12:48 pm
SFO
-
ONT
1h 28mnonstop
United Airlines Logo
1:53 pm - 3:25 pm
ONT
-
SFO
1h 32mnonstop
$192United Airlines
Wed, Mar 11 - Sun, Mar 15
United Airlines Logo
9:30 pm - 10:57 pm
SFO
-
ONT
1h 27mnonstop
United Airlines Logo
6:00 am - 7:33 am
ONT
-
SFO
1h 33mnonstop
$214United Airlines
Thu, Jan 15 - Sat, Jan 17
United Airlines Logo
9:30 pm - 10:53 pm
SFO
-
ONT
1h 23mnonstop
United Airlines Logo
1:53 pm - 3:25 pm
ONT
-
SFO
1h 32mnonstop
$215United Airlines
Tue, Jan 20 - Sat, Jan 24
United Airlines Logo
7:34 pm - 8:58 pm
DEN
-
ONT
2h 24mnonstop
United Airlines Logo
1:24 pm - 4:43 pm
ONT
-
DEN
2h 19mnonstop
$227United Airlines
Wed, Jan 21 - Wed, Jan 28
United Airlines Logo
4:20 pm - 5:43 pm
SFO
-
ONT
1h 23mnonstop
United Airlines Logo
1:53 pm - 3:25 pm
ONT
-
SFO
1h 32mnonstop
$229United Airlines
Sat, Jan 24 - Sun, Jan 25
United Airlines Logo
9:30 pm - 10:53 pm
SFO
-
ONT
1h 23mnonstop
United Airlines Logo
6:00 am - 7:32 am
ONT
-
SFO
1h 32mnonstop
$237United Airlines
Fri, Mar 13 - Wed, Mar 18
United Airlines Logo
9:30 pm - 10:57 pm
SFO
-
ONT
1h 27mnonstop
United Airlines Logo
6:00 am - 7:33 am
ONT
-
SFO
1h 33mnonstop
$239United Airlines
Sat, Jan 17 - Tue, Jan 20
United Airlines Logo
5:10 pm - 10:53 pm
SEA
-
ONT
5h 43m1 stop
United Airlines Logo
1:53 pm - 9:12 pm
ONT
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SEA
7h 19m1 stop
$247United Airlines
Useful Info

Good to know

Low seasonJanuary
Cheapest flight$79
Average price round-trip$419
Best time to beat the crowds with an average 13% drop in price.
Most popular time to fly and prices are also 19% lower on average.
Flight from Denver to Ontario
(price for this month)

When to book flights with United Airlines to Ontario

Average price per month
Flight prices as travel date approaches

FAQs for flying to Ontario with United Airlines

  • Which other airlines fly to Ontario?

    Along with United Airlines, you can also fly to Ontario with Delta, Southwest, Frontier and Alaska Airlines.

  • How much is a flight to Ontario with United Airlines?

    On average, United Airlines flights to Ontario cost $311 one-way.

  • Which airport do United Airlines flights to Ontario fly into?

    You’ll fly into Ontario Airport when flying to Ontario with United Airlines.

  • Are there any other airlines in Star Alliance that fly to Ontario?

    Unfortunately, there are no other airlines in Star Alliance that fly to Ontario.

Top tips for your flights to Ontario with United Airlines

  • The cheapest flight to Ontario with United Airlines found on KAYAK in the last 2 weeks departed from Chicago O'Hare Intl Airport and cost $255.
  • If you’re intending to fly with United Airlines, book your flight to Ontario at least 1 week before departure to ensure a below-average price.
  • High season for flights to Ontario with United Airlines is October and prices are highest at this time. The cheapest month to fly is January.

United Airlines customer reviews

7.4
Good9,115 verified ratings
7.3Comfort
6.6Food
7.1Entertainment
7.7Boarding
8.1Crew
Pros +
  • Flight was quick and easy. (in 2447 reviews)
  • "Clean plane, organized crew." (in 2084 reviews)
Show reviews that mention
Traveler rating:
Sort by:
A
10.0 Wonderful
Sat next to a one year old. She crawled all over the place and made me laugh.
J
2.0 Poor
Not United Airlines' fault. It's ORL airport's fault.
D
10.0 Wonderful
Great flight. On time boarding. Smooth flight and on time arrival at EWR. The flight crew was marvelous and there was a great selection of movies on the entertainment system. Our bags were at the carousel before we got there. Another excellent flight from United.
H
10.0 Wonderful
Was an easy flight
A
6.0 Okay
Houston airport is awful. Inefficient and rude.
A
8.0 Very good
everything was pretty good. Houston airport is awful. Unnecessarily inefficient; people working there are rude. Badly run
A
10.0 Wonderful
United airlines has the best customer experience from booking to arrival. I always fly United airlines. The mileage program is excellent
R
10.0 Wonderful
They did the one thing that really matters - got to Chicago early.
A
8.0 Very good
I liked the snacks and the flight attendants were friendly.
B
10.0 Wonderful
Good
Read more about United Airlines

Everything you need to know for your flight to Ontario

Other airlines flying to Ontario

Flight deals from the most popular airlines with KAYAK users flying the route
Frontier flights to Ontario
Alaska Airlines flights to Ontario
Delta flights to Ontario
Southwest flights to Ontario
American Airlines flights to Ontario