Route guide: ONT to DEN
Ontario, California to Denver on Frontier
Independent tool. Not Frontier.
Frontier flies nonstop from Ontario, California (ONT) to Denver (DEN), typically twice a day. Since Oct 26, GoWild! seats were open at window open on 16 of the 17 days we checked; Tuesdays were the most reliable.
Free account, no card: every search tool, 4 searches a day and 1 alert. Supporter: unlimited searches and 15 alerts for $4.79/month.
7-day free trial, then $4.79/month. Card required. Cancel before day 7 and you won't be charged.
- Your airport
- Nonstop, about 820 miles
Schedule
The usual schedule from Ontario, California
- Flights a day
- Typically 2
- All nonstop, flown by Frontier
- Flight time
- About 2h 20m
- 820 miles
- First departure
- Around 6:30 AM
- Pacific Time
- Last departure
- Around 11:30 AM
- Lands around 3 PM Mountain
Days it flies
The way back: typically 2 a day from Denver to Ontario, California, the last around 11 PM. The way back
Typical times from our own checks, rounded to the half hour. Frontier changes schedules by season, so always confirm with Frontier before you book.
When GoWild! seats opened on Ontario, California to Denver.
Ontario, California to Denver is a domestic route, so GoWild! seats open at 12:00 AM Pacific Time, the day before the flight. Each night at that moment we check Ontario, California to Denver and note what we found. Everything below comes from days that have already flown.
Seats open 12:00 AM Pacific, the day before you flySee the blackout dates
Last 60 days, ending yesterday
Ontario, California (ONT) to Denver (DEN), checked when the window opened
16 of 17
days had GoWild! seats when the window opened
- Opened with GoWild! seats
- Not opened
- Not checked
Last 60 days, ending yesterday.
Oldest first: Sep 13 to Nov 11.
Best weekdays
Days with GoWild! seats at window open, by day of the week
Tuesdays opened most often, Mondays the least. Blackout dates count as not open, so holiday weeks pull some days down.
Patterns describe past days. They do not predict or guarantee seats.
Seats listed right now on Ontario, California to Denver
Members onlyMembers see which Ontario, California to Denver flights have GoWild! seats right now, with times and seats.
You see this morning's seats on 2 routes per page. Supporters see seats as they change, on every route. Go unlimited for $4.79/month, 7-day free trial.
Free account: no card needed. Go Unlimited: 7-day free trial, then $4.79/month. Card required. Cancel before day 7 and you won't be charged.
7-day free trial, then $4.79/month. Card required. Cancel before day 7 and you won't be charged.
Seats listed right now
Next bookable day, Ontario, California to Denver, from our latest check. Times are local.
Next bookable day, Ontario, California to Denver, from this morning's check. Times are local.
-
Ontario, California (ONT) to Denver (DEN)
FlightNonstop2h 20m
GoWild! seats nowSupporters only
Get an alert when GoWild! seats open on Ontario, California to Denver.
We check every night when the window opens and tell you when seats show up. Free accounts get 1 alert, by email. Supporters get 15, by email and push notification.
Free account, no card needed.
Uses your 1 free alert.
Uses 1 of your 15 alerts.
Did Discount Den beat the standard fare?
Discount Den is Frontier's paid fare club. On our own checks we compare its fare with the standard fare on the same Ontario, California to Denver flight, so you can see whether it pays off on this route.
Read our Discount Den guideCheaper than standard
100%
of days: 17 of the 17 days we compared
Average saving
$1
per one-way, on the days Discount Den was cheaper
Lowest Discount Den fare
$139
one-way, the lowest we saw from Oct 26 to Nov 11
Fares we saw on checks made 0 to 2 days before departure. Fares booked further ahead can be different. Ontario, California to Denver, one-way, without bags or seat selection.
Today's fares on Ontario, California to Denver
Members onlyMembers see today's Discount Den and standard fares side by side in the app, flight by flight.
Search Ontario, California to Denver in the app to see today's Discount Den and standard fares. It uses 1 of your 4 searches today.
Today's Discount Den and standard fares are in the app, flight by flight.
The way back, and other ways to go.
Plan both directions before you fly out. Seats for the flight home open on Denver's clock: 12:00 AM Mountain, the day before that flight.
The way back
Denver to Ontario, California
Typically 2 nonstops a day. The last one usually leaves around 11 PM.
GoWild! seats were open at window open on 15 of 16 days we checked since Oct 27.
Nearby airport
Orange County (SNA) to Denver
Orange County is about 30 miles from Ontario, California. Frontier flies it nonstop.
See Orange County to DenverNearby airport
Los Angeles (LAX) to Denver
Los Angeles is about 47 miles from Ontario, California. Frontier flies it nonstop.
See Los Angeles to DenverOntario, California to Denver questions.
How long is the flight from Ontario, California to Denver?
About 2h 20m nonstop, for about 820 miles. Denver is 1 hour ahead of Ontario, California, so add that to the clock when you land.
How many nonstop flights a day go from Ontario, California to Denver?
Typically 2 a day. These are typical counts from our own checks, not a timetable, so confirm with Frontier.
Which days does Frontier fly Ontario, California to Denver nonstop?
Nonstops were seen every day of the week in our checks.
When do GoWild! seats open for Ontario, California to Denver?
At 12:00 AM Pacific Time, the day before the flight, because it is a domestic route. For the way back, seats open at 12:00 AM Mountain time, the day before that flight. Blackout dates apply, and seats can sell out between our check and your booking, so always confirm on Frontier.
How often were GoWild! seats open on Ontario, California to Denver?
On 16 of the 17 days we checked since Oct 26, GoWild! seats were open when the window opened. Tuesdays were the most reliable. Patterns describe past days. They do not predict or guarantee seats.
Is Discount Den usually cheaper than the standard fare on Ontario, California to Denver?
On 17 of the 17 days we compared, Discount Den was cheaper than the standard fare, by $1 on average per one-way. These are fares we saw on checks made 0 to 2 days before departure; fares booked further ahead can be different.
Can I fly into a nearby airport instead?
Yes. Nearby options on Frontier: Orange County (SNA) to Denver and Los Angeles (LAX) to Denver. The GoWild! window follows the departure airport's clock on each of them.
Schedules and history come from our own checks. Always confirm with Frontier before you book.
Free, or $4.79 a month.
Start with a free account, no card needed. Go unlimited when you want seats on every route as they change, and alerts with push notifications.
Free
- 4 searches a day
- 1 alert, by email
- Every search tool: Map, One Way, Day Trips, Route Builder, Calendar
- No card needed
Your plan
Supporter
7-day free trial- Everything in Free
- Unlimited searches*
- 15 alerts, by email and push notification
- The WildFares iPhone app
- Cancel any time from Settings
7-day free trial, then $4.79/month. Card required. Cancel before day 7 and you won't be charged.
7-day free trial, then $4.79/month. Card required. Cancel before day 7 and you won't be charged.
* Unlimited means unlimited for your own trip planning. Each account is for one person, and automated or bulk searching isn't allowed. Details in our Terms.
Ready to take off?
Join 8,500+ pass holders who are flying smarter, not harder.
Search Ontario, California to Denver in the app, or take WildFares with you on your iPhone.
Free account, no card needed. Upgrade any time.
7-day free trial, then $4.79/month. Card required. Cancel before day 7 and you won't be charged.