Frontier's Economy Bundle includes a carry-on bag and Standard seat choice, ideal for budget travelers.
Frontier's Premium Bundle offers extra legroom and priority boarding for a small additional cost.
Low season | February |
---|---|
High season | May |
Cheapest flight | $42 |
Find which airlines fly direct from Denver Intl Airport to Ontario Airport, which days they fly and book direct flights.
Direct departures
Denver Intl to Ontario
Monday
Air Canada, Frontier, Southwest, +1 more
Air Canada, Frontier, +2 more
1
Tuesday
Air Canada, Frontier, Southwest, +1 more
Air Canada, Frontier, +2 more
1
Wednesday
Air Canada, Frontier, Southwest, +1 more
Air Canada, Frontier, +2 more
1
Thursday
Air Canada, Frontier, Southwest, +1 more
Air Canada, Frontier, +2 more
1
Friday
Air Canada, Frontier, Southwest, +1 more
Air Canada, Frontier, +2 more
1
Saturday
Air Canada, Frontier, Southwest, +1 more
Air Canada, Frontier, +2 more
1
Sunday
Air Canada, Frontier, Southwest, +1 more
Air Canada, Frontier, +2 more
1
Direct returns
Ontario to Denver Intl
Monday
Air Canada, Frontier, Southwest, +1 more
Air Canada, Frontier, +2 more
1
Tuesday
Air Canada, Frontier, Southwest, +1 more
Air Canada, Frontier, +2 more
1
Wednesday
Air Canada, Frontier, Southwest, +1 more
Air Canada, Frontier, +2 more
1
Thursday
Air Canada, Frontier, Southwest, +1 more
Air Canada, Frontier, +2 more
1
Friday
Air Canada, Frontier, Southwest, +1 more
Air Canada, Frontier, +2 more
1
Saturday
Air Canada, Frontier, Southwest, +1 more
Air Canada, Frontier, +2 more
1
Sunday
Air Canada, Frontier, Southwest, +1 more
Air Canada, Frontier, +2 more
1
I would have liked to arrive on time - not 5 hours late!
I would have liked to arrive on time - not 5 hours late!
It was a perfect flight in all aspects! Both legs!
Boarding process, crew were good. But the seats were so uncomfortable that was all I could focus on. I literally had to sit forward so that all 3 of us could fit in row. I will try to avoid Southwest in the future for any flights over 60 minutes.
1.5 hour delay, poor service, no compassion from the crew. Terrible experience
Great flight, 47 passengers on a 180 seat plane. Stewardess was pleasant and cheerful.
Great experience flying Southwest. The crew was really kind and helpful, and very friendly with our toddler.
Our flight was diverted from being a non-stop to getting within 150 miles and requiring another plane. We heard 4 or 5 different versions from SW as to why we had to stop, then wait for a replacement plane. Five hour delay, weather did not come up as a single excuse.... communication was not clear and well explained. No one really took charge!
Plane late from DC to Austin 30 minutes. Crew made up much of the time enroute to San Diego.
I really like open seating. I hate that I've heard this is going away. This is one of the unique things that makes Southwest my goto choice.
Fine, but how to board on SW versus othrr airlines, is just lame. Goood staff though and all was solid otherwise.
Electric plugs didn't work. Entertainment system wasn't working
The design of the light switch on the arm rest is ridiculous.
The gate attendant let me walk right by her with a bag too big for the overhead compartment
Overall, it was a good experience. Boarding was good and there was plenty of overhead bin space for everyone’s carryons (even when we boarded toward the end). Only improvement would be to offer trash service more regularly.
David went above and beyond to make our flight the best that it could be
No food service almost missed because of first flight delays
Had a hard time finding my assigned seat. No attendants to assist.
The negative was the wait at the airport coming back. I checked my bags in, an hour before boarding and I get the notification that my flight was delayed. Rather had gotten the notification while I was at the hotel. Then it was delayed 3 x’s. Ugh!
Plane still had screens for watching movies. Good selection too.
There was no air on the plane and it was very hot.
Everything went as planned. Crew was great. Seats were still not that comfortable.
they delayed my flight which ended up, causing my layover flight to leave without me, resulting in me missing a flight and having to stay overnight in Houston international. I got no compensation other than a flight to my original location only a day later. i’ve never experienced such a unprofessional situation
The seats were extremely hard and uncomfortable, even for a budget airline.
Boarding was very well executed. Got my bag right away.
Overall experience good. There was no food and seats were not terribly comfortable.
There was nothing to like, flight delayed had to move to different departure areas, disorganized to say the leasr
There were a lot of issues every step of the process. Check in, security, boarding, and dealing with luggage. Plus the money you think you are saving you end up using in hidden fees.
The flight attendant was arguing with a passenger before takeoff. The passenger was frustrated but the flight attendant should have handled it with grace, but instead she was nasty and rude. The seats were comfortable and the flight was uneventful. I wish we didn’t have to pay for drinks or snacks but that’s what you get with a budget airline.
Flight was cancelled and was not able to get another flight thru Frontier. Per frontier a refund was issued but I do not see a refund on my Afirm account.
Booked two aisle seats and were switched to an aisle and middle. Not happy.
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