Cheap flights from Denver to Ontario (DEN - ONT)

DEN — ONT
Aug 16 — Aug 231

The best prices from Denver Intl to Ontario are usually found in October or September, booked 51 days in advance, depart on a Thursday or Tuesday and return on a Tuesday

How to find the cheapest flight from Denver (DEN) to Ontario (ONT)

All the information you need to plan the best DEN to ONT flight in 2022: compare Denver to Ontario flight prices with the expected peak season, weather and rainfall in Ontario.

DEN - ONT

Price

$87 - $214

ONT

Temperature

53.6 - 78.8 °F

ONT

Rainfall

0.1 - 3.4 inches

Popular inMarchHigh demand for flights, 29% potential price rise
Cheapest inOctoberBest time to find cheap flights, 43% potential price drop
Round-trip from$87From Denver Intl to Ontario
One-way from$86One-way flight from Denver Intl to Ontario

What is the cheapest day to fly round-trip from Denver to Ontario?

Wednesday is generally a great day to depart. Flying on this day could help you save up to 13%.

How far in advance should I book a flight from Denver to Ontario?

To save on the cost of your flight from Denver to Ontario, book at least 58 days before your planned departure. Booking around this time can save you about 46% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $189 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $217.

What is the cheapest month to fly from Denver to Ontario?

September is one of the best times of the year to fly to Ontario from Denver. Prices for September average $216 per person but you can even find prices for as low as $53. The most expensive prices can be found in the month of February. Opting for a September flight can save you 126% on your journey compared to booking in February

When is the cheapest time to fly from Denver to Ontario (DEN - ONT)?

One of the essential ways to save on airfare from Denver to Ontario is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the afternoon could potentially save you up to 27% on airfare.

Cheap flights from Denver to Ontario in August, September 2022

The best prices found for DEN to ONT flights for August, September
Sep 10 - Sep 17
DEN

Denver Intl

ONT

Ontario

Nonstop

2h 24m
ONT

Ontario

DEN

Denver Intl

Nonstop

2h 17m
$80

Frontier

Pick Dates

Deal found 8/11/22

Sep 10 - Sep 12
DEN

Denver Intl

ONT

Ontario

Nonstop

2h 23m
ONT

Ontario

DEN

Denver Intl

Nonstop

2h 24m
$82

Frontier

Pick Dates

Deal found 8/11/22

Aug 31 - Sep 7
DEN

Denver Intl

ONT

Ontario

Nonstop

2h 20m
ONT

Ontario

DEN

Denver Intl

Nonstop

2h 21m
$88

Frontier

Pick Dates

Deal found 8/10/22

Denver to Ontario 2022 flight deals

Cheap flights to Ontario from Denver found for this year
Sep 10 - Sep 17
DEN

Denver Intl

ONT

Ontario

Nonstop

2h 24m
ONT

Ontario

DEN

Denver Intl

Nonstop

2h 17m
$80

Frontier

Pick Dates

Deal found 8/11/22

Oct 8 - Oct 11
DEN

Denver Intl

ONT

Ontario

Nonstop

2h 22m
ONT

Ontario

DEN

Denver Intl

Nonstop

2h 17m
$81

Frontier

Pick Dates

Deal found 8/10/22

Sep 10 - Sep 12
DEN

Denver Intl

ONT

Ontario

Nonstop

2h 23m
ONT

Ontario

DEN

Denver Intl

Nonstop

2h 24m
$82

Frontier

Pick Dates

Deal found 8/11/22

Cheap Frontier flights from Denver to Ontario

Sep 10 - Sep 17
DEN

Denver Intl

ONT

Ontario

Nonstop

2h 24m
ONT

Ontario

DEN

Denver Intl

Nonstop

2h 17m
$80

Frontier

Pick Dates

Deal found 8/11/22

Oct 8 - Oct 11
DEN

Denver Intl

ONT

Ontario

Nonstop

2h 22m
ONT

Ontario

DEN

Denver Intl

Nonstop

2h 17m
$81

Frontier

Pick Dates

Deal found 8/10/22

Aug 31 - Sep 7
DEN

Denver Intl

ONT

Ontario

Nonstop

2h 20m
ONT

Ontario

DEN

Denver Intl

Nonstop

2h 21m
$88

Frontier

Pick Dates

Deal found 8/10/22

Non-stop flights to Ontario from Denver

Save time with Denver to Ontario direct flight deals
Sep 10 - Sep 17
DEN

Denver Intl

ONT

Ontario

Nonstop

2h 24m
ONT

Ontario

DEN

Denver Intl

Nonstop

2h 17m
$80

Frontier

Pick Dates

Deal found 8/11/22

Oct 8 - Oct 11
DEN

Denver Intl

ONT

Ontario

Nonstop

2h 22m
ONT

Ontario

DEN

Denver Intl

Nonstop

2h 17m
$81

Frontier

Pick Dates

Deal found 8/10/22

Sep 10 - Sep 12
DEN

Denver Intl

ONT

Ontario

Nonstop

2h 23m
ONT

Ontario

DEN

Denver Intl

Nonstop

2h 24m
$82

Frontier

Pick Dates

Deal found 8/11/22

Last minute flights from Denver to Ontario

Late deals on return flights to Ontario from Denver, departing today and this week
Aug 17 - Aug 24
DEN

Denver Intl

ONT

Ontario

Nonstop

2h 20m
ONT

Ontario

DEN

Denver Intl

Nonstop

2h 24m
$104

Frontier

Pick Dates

Deal found 8/10/22

Aug 18 - Sep 17
DEN

Denver Intl

ONT

Ontario

Nonstop

2h 20m
ONT

Ontario

DEN

Denver Intl

Nonstop

2h 24m
$108

Frontier

Pick Dates

Deal found 8/11/22

Aug 19 - Aug 21
DEN

Denver Intl

ONT

Ontario

Nonstop

2h 20m
ONT

Ontario

DEN

Denver Intl

Nonstop

2h 24m
$114

Frontier

Pick Dates

Deal found 8/10/22

One-way flights to Ontario from Denver

The cheapest one-way flights from Denver to Ontario
Sep 7
DEN

Denver Intl

ONT

Ontario

Nonstop

2h 24m
$43

Frontier

Pick Dates

Deal found 8/8/22

Sep 13
DEN

Denver Intl

ONT

Ontario

Nonstop

2h 24m
$44

Frontier

Pick Dates

Deal found 8/11/22

Sep 26
DEN

Denver Intl

ONT

Ontario

1 stop

18h 48m
$45

Multiple Airlines

Pick Dates

Deal found 8/10/22

Related info for your journey

Useful info, stats and facts about Denver to Ontario flights.

What airports do I use to fly from Denver to Ontario?

You will need to book a flight from Denver Intl to Ontario if you want to fly from Denver to Ontario. At least 9 different airlines have flights from Denver Intl (DEN) to Ontario (ONT) on a regular basis. There are 12 flights to Ontario from the Denver airport per day. If you manage to book one that is nonstop, then you can expect the flight time from DEN to ONT to be around 2h 18m.

Which airlines flying from Denver Intl to Ontario have flexible cancellations due to COVID-19?

Some of our airline partners flying from Denver Intl to Ontario have new flexible policies in place due to COVID-19. Frontier, United Airlines, and Juneyao Airlines are some of the carriers where you may find flexible cancellation policies. You can use our site to filter for airlines like Frontier with this kind of flexibility.

Can I find flights from Denver to Ontario for under $100 on Cheapflights?

Yes, there are multiple flights from Denver to Ontario for under $100. The cheapest flight booked recently is on Frontier for just $80, but on average you can expect to pay $97.

Are there nonstop flights from Denver to Ontario for under $100 on Cheapflights?

Cheapflights has at least 20 direct flights from Denver to Ontario under $100. A good price for a nonstop flight from Denver to Ontario is less than $97.

Are there last-minute flights available from Denver to Ontario for under $200?

There are currently 20+ open flights from Denver to Ontario within the next 7 days for less than $200.

How popular is this Denver to Ontario flight route?

Flights from Denver Intl to Ontario have been viewed 66 times in the past calendar month.

What is the cheapest airline to fly from Denver to Ontario round-trip?

According to our current data, Frontier ($80), offers the cheapest pricing from Denver to Ontario. Frontier is priced at 47% lower than the current average price of a flight leaving 3 months from now.

What are the most popular airlines that fly from Denver to Ontario?

Consider Undisclosed Carrier, American Airlines or Delta when booking your flight. These represent the most popular airlines when flying from Denver to Ontario.

What are the most reliable airlines from Denver to Ontario?

Before booking your flight to Ontario from Denver, check out the most reliable airlines to get you to your destination on time: United Airlines (84%), SkyWest Airlines (84%), Frontier( 75%).

What are the cheapest flights from Denver to Ontario?

The cheapest flight price from Denver to Ontario is $57. On average you can expect to pay $366. The most popular route, (Denver Intl - Ontario), can usually be booked for $97.

Alternative routes for Denver to Ontario

See prices for flight routes from nearby airports that may be better suited for you.

Top 5 airlines flying from Denver to Ontario

The chart below displays the airlines Cheapflights users traveling from Denver to Ontario choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
AirlineCheapestAverageFlexibilityOn-timeCOVID-19 safety
Juneyao AirlinesCheapest$12Average$24FlexibilityNo cancel feeOn-time66%COVID-19 safety
Search Juneyao Airlines flights
FrontierCheapest$47Average$148FlexibilityNo cancel feeOn-time62%COVID-19 safety
Search Frontier flights
American AirlinesCheapest$91Average$244FlexibilityNo cancel feeOn-time71%COVID-19 safety
Search American Airlines flights
United AirlinesCheapest$98Average$262FlexibilityNo cancel feeOn-time69%COVID-19 safety
Search United Airlines flights
DeltaCheapest$148Average$280FlexibilityNo cancel feeOn-timeN/ACOVID-19 safety
Search Delta flights

Hourly flight availability from Denver to Ontario

See what time of day planes typically take off from Denver to Ontario
12%of flight departuresEarly morningMidnight to 6 am
40%of flight departuresMorning6 am to noon
19%of flight departuresAfternoonNoon to 6 pm
29%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Noon
6 PM

Weekly flight availability from Denver to Ontario

See how many times per day planes take to the skies headed from Denver to Ontario
Sunday12daily flights
Monday13daily flights
Tuesday13daily flights
Wednesday13daily flights
Thursday12daily flights
Friday12daily flights
Saturday12daily flights