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Find cheap Frontier flights to Ontario from $25

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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.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip Frontier flight deals to Ontario

Fri, Jun 6 - Sun, Jun 8
Frontier Logo
10:11 pm - 11:39 pmSFO-ONT
1h 28mnonstop
Frontier Logo
9:41 pm - 11:15 pmONT-SFO
1h 34mnonstop
$58Frontier
Find Deal
Tue, May 27 - Tue, Jun 3
Frontier Logo
3:26 pm - 6:02 pmSEA-ONT
2h 36mnonstop
Frontier Logo
11:33 am - 2:20 pmONT-SEA
2h 47mnonstop
$61Frontier
Find Deal
Fri, May 30 - Mon, Jun 2
Frontier Logo
10:11 pm - 11:36 pmSFO-ONT
1h 25mnonstop
Frontier Logo
9:41 pm - 11:15 pmONT-SFO
1h 34mnonstop
$61Frontier
Find Deal
Thu, May 22 - Sun, May 25
Frontier Logo
10:11 pm - 11:36 pmSFO-ONT
1h 25mnonstop
Frontier Logo
9:41 pm - 11:11 pmONT-SFO
1h 30mnonstop
$62Frontier
Find Deal
Sat, May 31 - Sun, Jun 8
Frontier Logo
10:11 pm - 11:36 pmSFO-ONT
1h 25mnonstop
Frontier Logo
9:41 pm - 11:15 pmONT-SFO
1h 34mnonstop
$63Frontier
Find Deal
Sat, May 31 - Fri, Jun 6
Frontier Logo
10:11 pm - 11:36 pmSFO-ONT
1h 25mnonstop
Frontier Logo
9:41 pm - 11:15 pmONT-SFO
1h 34mnonstop
$64Frontier
Find Deal
Thu, May 29 - Tue, Jun 3
Frontier Logo
1:50 pm - 4:26 pmSEA-ONT
2h 36mnonstop
Frontier Logo
11:33 am - 2:20 pmONT-SEA
2h 47mnonstop
$66Frontier
Find Deal
Sat, May 17 - Mon, May 19
Frontier Logo
10:48 am - 12:15 pmSFO-ONT
1h 27mnonstop
Frontier Logo
8:24 am - 10:02 amONT-SFO
1h 38mnonstop
$67Frontier
Find Deal
Thu, May 29 - Fri, May 30
Frontier Logo
10:11 pm - 11:36 pmSFO-ONT
1h 25mnonstop
Frontier Logo
9:41 pm - 11:11 pmONT-SFO
1h 30mnonstop
$68Frontier
Find Deal
Fri, Jun 6 - Sun, Jun 8
Frontier Logo
10:11 pm - 11:39 pmSFO-ONT
1h 28mnonstop
Frontier Logo
9:41 pm - 11:15 pmONT-SFO
1h 34mnonstop
$69Frontier
Find Deal
Useful Info

Good to know

Low seasonFebruary
High seasonMay
Cheapest flight$25
Average price round-trip$112
Good deal round-trip$79
Best time to beat the crowds but there is an average 3% increase in price.
Most popular time to fly and prices are also 9% lower on average.
Flight from Dallas/Fort Worth Airport 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 $155. Flights to Ontario with United Airlines cost $317 on average, while JetBlue cost $332.

  • Which other airlines fly to Ontario?

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

  • How much is a flight to Ontario with Frontier?

    On average, Frontier flights to Ontario cost $155 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 3,289 verified guest reviews
4.6Entertainment
5.6Comfort
6.8Crew
6.2Boarding
4.8Food
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
Southwest flights to Ontario
American Airlines flights to Ontario
Delta flights to Ontario
Alaska Airlines flights to Ontario

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