For a quick departure, use the A Line train to reach DEN from Union Station in 37 minutes, avoiding traffic hassles.
Round-trip from | $120 (Cheapflightsfares) |
---|---|
One-way from | $65 (Frontier) |
Popular in | June |
Cheapest in | January |
Average price | $191 |
Good round-trip deal | $137 or less |
Good one-way deal | $106 or less |
Fly from
Fly to
Route
Depart
Return
Price
DenverOntario
DEN - ONT
DENONT
Denver Intl
vie. 8/29
10:29 pm-11:50 pm
Nonstop2h 21m
Ontario
vie. 9/5
6:11 pm-9:33 pm
Nonstop2h 22m
DenverOntario
DEN - ONT
DENONT
Denver Intl
jue. 9/25
6:20 pm-7:45 pm
Nonstop2h 25m
Ontario
sáb. 9/27
1:25 pm-4:35 pm
Nonstop2h 10m
DenverOntario
DEN - ONT
DENONT
Denver Intl
jue. 9/25
12:14 pm-4:05 pm
1 stop4h 51m
Ontario
sáb. 9/27
1:10 pm-6:07 pm
1 stop3h 57m
DenverOntario
DEN - ONT
DENONT
Denver Intl
mar. 10/21
7:02 pm-11:49 pm
1 stop5h 47m
Ontario
mié. 10/29
4:09 pm-11:59 pm
1 stop6h 50m
DenverOntario
DEN - ONT
DENONT
Denver Intl
vie. 9/5
6:25 pm-10:40 pm
1 stop5h 15m
Ontario
vie. 9/12
5:05 pm-10:33 pm
1 stop4h 28m
DenverOntario
DEN - ONT
DENONT
Denver Intl
mar. 7/29
7:35 pm-8:54 pm
Nonstop2h 19m
Ontario
dom. 8/3
6:31 pm-9:50 pm
Nonstop2h 19m
DenverOntario
DEN - ONT
DENONT
Denver Intl
vie. 9/12
6:17 pm-11:53 pm
1 stop6h 36m
Ontario
sáb. 9/13
6:00 am-2:06 pm
1 stop7h 06m
DenverOntario
DEN - ONT
DENONT
Denver Intl
mar. 7/15
7:49 am-9:09 am
Nonstop2h 20m
DenverOntario
DEN - ONT
DENONT
Denver Intl
jue. 8/14
11:15 am-12:32 pm
Nonstop2h 17m
DenverOntario
DEN - ONT
DENONT
Denver Intl
jue. 8/14
9:50 am-12:40 pm
1 stop3h 50m
The price you pay for your flight from Denver to Ontario may vary depending on when you book. For the best chance of a lower fare, look to book 40 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
Currently, August is the cheapest month in which you can book a flight from Denver to Ontario (average of $246). Flying from Denver to Ontario in March is currently the most expensive (average of $328). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
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 morning could potentially save you up to 29% on airfare.
Travelers seeking maximum savings on their Denver to Ontario flight should consider departing on Tuesday evenings when fares are most often at their lowest. Thursday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
The most flights from DEN to ONT are scheduled on a Monday (12 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (11 on average).
In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.
If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).
Comfort
Overall
Crew
Food
Entertainment
Boarding
Reviews
James,Apr 2025
LAX - SFO
Comfort
Overall
Crew
Food
Entertainment
Boarding
Reviews
James,Apr 2025
LAX - SFO
Comfort
Overall
Crew
Food
Entertainment
Boarding
Reviews
James,Apr 2025
LAX - SFO
Comfort
Overall
Crew
Food
Entertainment
Boarding
Reviews
James,Apr 2025
LAX - SFO
Comfort
Overall
Crew
Food
Entertainment
Boarding
Reviews
James,Apr 2025
LAX - SFO
Comfort
Overall
Crew
Food
Entertainment
Boarding
Reviews
James,Apr 2025
LAX - SFO
Airline | Cheapest | Average | Flexibility | On-time |
---|---|---|---|---|
Cheapest$56 | Average$132 | FlexibilityNo cancel fee | On-time62% | |
Cheapest$117 | Average$248 | FlexibilityNo cancel fee | On-time63% | |
Cheapest$137 | Average$283 | FlexibilityNo cancel fee | On-time69% |