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Amazing Frontier Airlines DEN to ONT Flight Deals

The cheapest flights to Los Angeles - Ontario Intl. found within the past 7 days were $59 round trip and $44 one way. Prices and availability subject to change. Additional terms may apply.


ONT From DEN Economy Coach Packages on Similar Airlines


FAQs about Frontier Airlines Flights from DEN to ONT
Can I catch a flight from Denver, CO (DEN-Denver Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.) right now?

For information on any current Ontario, CA (ONT-Los Angeles - Ontario Intl.) quarantine requirements and travel advice, visit our Covid-19 Travel Advisor. Look before you arrange your flight, so you don't get caught up.

If I am not able to travel due to COVID-19, can I change my booking to a later date?

For more info about changing your flight to ONT, please visit our Customer Service Portal.

What is the best day to buy a plane ticket?

This just in! Airfares offered on Thursdays tend to be the cheapest, according to flight demand on Travelocity in 2020. Wednesday and Friday prices are also good, but you may want to prepare your budget if booking on a Sunday, as data shows the end of the week is when prices are generally at their highest.

What are the cheapest days to fly?

Frequent travelers may already know this, but earlier in the week can be the cheapest time to fly. In 2020, flights departing on a Monday were generally the cheapest of the week, whereas you may pay a premium for weekend flights when demand is usually high. On average, tickets were most expensive for Saturday departures, so if you need to fly out on a weekend, you might look for deals ahead of time.

How far in advance can you book a flight?

Trying to figure out how early you should book your flight? It's possible to start comparing international airfares on Travelocity up to 12 months in advance. However, it does depend on the carrier as not all airlines release their prices that far out. According to our 2020 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 2 weeks to 2 months prior to their travel dates.

How can I save money on airline tickets?

We'll let you in on a secret...You can save big on flights if you mix and match your airlines and fare types. In fact, travelers who booked flights on Travelocity in 2020 saved nearly 40% when their return flights consisted of two different airlines or fare types.

*According to flight demand on Travelocity.com from January to December 2020. Savings are subject to change based on departure location, date and destination.

Carrier Flight Depart DEN Arrive ONT Sun
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Stops
F9 373 07:45 am 09:09 am Check fare - Check fare - Check fare - - 0 stop(s)
F9 627 11:05 am 02:49 pm Check fare Check fare - - Check fare Check fare - 1 stop(s)
F9 751 12:17 pm 03:37 pm Check fare Check fare - - Check fare Check fare - 1 stop(s)
F9 371 06:00 pm 07:23 pm - Check fare - Check fare - Check fare Check fare 0 stop(s)

Travelers ❤️ these 🏨 after their flight to Ontario

DoubleTree by Hilton Ontario Airport
DoubleTree by Hilton Ontario Airport
4.0 out of 5.0 222 N Vineyard Ave, Ontario, CA
$135
3.6/5 (18 reviews)

Clean and easy check in

Reviewed on May 23, 2021
This smoke-free hotel features a nightclub and 2 restaurants. Traveling on business? Take advantage of the 13 conference rooms, 24-hour business center, and ...
Ontario Airport Hotel & Conference Center
Ontario Airport Hotel & Conference Center
3.5 out of 5.0 700 N Haven Ave, Ontario, CA
$102
4.0/5 (16 reviews)

Nice stay

Reviewed on Jun 16, 2021
This hotel features an outdoor pool, a 24-hour fitness center, and a restaurant. Traveling on business? Take advantage of the 16 conference rooms, 24-hour business ...
Holiday Inn Ontario Airport, an IHG Hotel
Holiday Inn Ontario Airport, an IHG Hotel
3.0 out of 5.0 2155 E. Convention Center Way, Ontario, CA
$110
4.1/5 (23 reviews)

all was ok

Reviewed on Apr 6, 2021
This hotel features a restaurant, a spa tub, and a bar/lounge. Traveling on business? Take advantage of the 3 conference rooms, as well as the 24-hour business ...