ONT

Find cheap Frontier flights to Ontario from $28

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Cheap Frontier Flight Deals to Ontario

 
Here are some of the best deals found on KAYAK recently from Frontier 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.

Recent round-trip Frontier flight deals to Ontario

KAYAK's recommended round-trip Frontier deals departing in the coming months to Ontario.
Discover the best prices for you by selecting your travel dates on KAYAK.
Frontier Logo
10:48 am - 12:15 pmSFO-ONT
1h 27mnonstop
Frontier Logo
8:24 am - 10:02 amONT-SFO
1h 38mnonstop
$56Frontier
Find Deal
Sat, May 10 - Mon, May 12
Frontier Logo
10:48 am - 12:15 pmSFO-ONT
1h 27mnonstop
Frontier Logo
8:24 am - 10:02 amONT-SFO
1h 38mnonstop
$59Frontier
Find Deal
Sat, May 10 - Mon, May 12
Frontier Logo
8:34 am - 10:02 amSFO-ONT
1h 28mnonstop
Frontier Logo
8:24 am - 10:02 amONT-SFO
1h 38mnonstop
$68Frontier
Find Deal
Sun, May 11 - Sun, May 18
Frontier Logo
8:34 am - 10:02 amSFO-ONT
1h 28mnonstop
Frontier Logo
8:24 am - 10:02 amONT-SFO
1h 38mnonstop
$76Frontier
Find Deal
Thu, May 15 - Sat, May 17
Frontier Logo
10:48 am - 12:15 pmSFO-ONT
1h 27mnonstop
Frontier Logo
8:24 am - 10:02 amONT-SFO
1h 38mnonstop
$77Frontier
Find Deal
Sat, May 17 - Sun, May 18
Frontier Logo
10:11 pm - 11:36 pmSFO-ONT
1h 25mnonstop
Frontier Logo
9:41 pm - 11:11 pmONT-SFO
1h 30mnonstop
$78Frontier
Find Deal
Sat, May 24 - Thu, May 29
Frontier Logo
10:11 pm - 11:39 pmSFO-ONT
1h 28mnonstop
Frontier Logo
9:41 pm - 11:15 pmONT-SFO
1h 34mnonstop
$79Frontier
Find Deal
Fri, Jun 13 - Fri, Jun 20
Frontier Logo
10:11 pm - 11:39 pmSFO-ONT
1h 28mnonstop
Frontier Logo
9:41 pm - 11:14 pmONT-SFO
1h 33mnonstop
$83Frontier
Find Deal
Fri, Jun 13 - Fri, Jul 11
Frontier Logo
10:11 pm - 11:39 pmSFO-ONT
1h 28mnonstop
Frontier Logo
9:41 pm - 11:14 pmONT-SFO
1h 33mnonstop
$85Frontier
Find Deal
Sun, Jun 15 - Mon, Jul 14
Frontier Logo
8:00 am - 9:09 amDFW-ONT
3h 09mnonstop
Frontier Logo
8:09 pm - 1:24 amONT-DFW
3h 15mnonstop
$86Frontier
Find Deal
Tue, Aug 5 - Sat, Aug 9
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Good to know

Low seasonFebruary
High seasonMay
Cheapest flight$28
Average price round-trip$190
Good deal round-trip$144
Best time to beat the crowds but there is an average 3% increase in price.
Most popular time to fly and prices are also 11% lower on average.
Flight from San Francisco to Ontario
(avg. price over the last 2 weeks)
or less

When to book flights with Frontier to Ontario

Average price per month
Flight prices as travel date approaches

FAQs for flying to Ontario with Frontier

  • Is Frontier cheaper than other airlines flying to Ontario?

    Frontier is the cheapest airline flying to Ontario with an average return price of $147. Flights to Ontario with Delta cost $297 on average, while United Airlines cost $317.

  • Which other airlines fly to Ontario?

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

  • How much is a flight to Ontario with Frontier?

    On average, Frontier flights to Ontario cost $147 for a round-trip.

  • Which airport do Frontier flights to Ontario fly into?

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

Top tips for your flights to Ontario with Frontier

  • The cheapest flight to Ontario with Frontier found on KAYAK in the last 2 weeks departed from Las Vegas and cost $61.

Frontier customer reviews

5.9
FairBased on 3,287 verified guest reviews
6.2Boarding
6.8Crew
4.8Food
4.6Entertainment
5.6Comfort
Pros +
Cons -
  • On the ticket it said checked bag. (in 1044 reviews)
Show reviews that mention
Traveler rating:
Sort by:
A
2.0 Poor
The reps working at the airport counter were dumber than a second coat of paint.
D
2.0 Poor
Less chaos and timely departure
A
4.0 Mediocre
My costume jewelry was stolen out of my bag. Got to airport and my bag weighed 45 pounds- 5 pounds over cost me $100 Long lines in tier one. No entertainment No WiFi no free drinks or snacks
A
6.0 Okay
Not very good. Paid in excess of $400 for assigned seating for my family and that was not provided. I want that money back.
A
2.0 Poor
The seats were hard molded plastic covered in plastic vinyl. And the scam to charge people extra to sit together. Don’t they know we can just ask someone to trade seats. And watching the staff separate young children from parents… super classy. We had to guilt them into offering up our seats. This companies policies suck. Don’t give them your money.
A
2.0 Poor
The seats were awful, hard plastic covered in sheet vinyl. The airline tries to scam you into paying extra to get seat together when the flight wasn’t full. They were going to separate a family with young children but my wife who had a row to herself gave up her seat so the young mom could be with her young boys. I’m never giving this airline my money again.
A
10.0 Wonderful
It was a short flight so no food or entertainment….
N
2.0 Poor
Frontier is a scam! Do not sell this airline.
G
8.0 Very good
Seats are uncomfortable but price is good. Guess I can put up with misery for four hours.
A
10.0 Wonderful
Best ever app invented
Read more about Frontier

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
United Airlines flights to Ontario
Alaska Airlines flights to Ontario
Southwest flights to Ontario
Delta flights to Ontario
American Airlines flights to Ontario

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