
Most accurate provider | CheapOair 3 stars |
|---|---|
Most trusted provider | CheapOair 3 stars |
Round-trip from | $83 (Super.com) |
One-way from | $45 (CheapOair) |
Popular in | June |
Cheapest in | January |
Average price | $200 |
Good round-trip deal | $183 or less |
Good one-way deal | $104 or less |
Fly from
Fly to
Route
Depart
Return
Price
OntarioDenver
ONT - DEN
ONTDEN
Ontario
Wed 1/7
7:00 am-10:22 am
Nonstop2h 22m
Denver Intl
Sat 1/10
9:50 pm-7:36 am
1 stop10h 46m
OntarioDenver
ONT - DEN
ONTDEN
Ontario
Sat 2/14
8:21 am-8:33 pm
1 stop11h 12m
Denver Intl
Tue 2/17
8:00 pm-9:34 pm
Nonstop2h 34m
OntarioDenver
ONT - DEN
ONTDEN
Ontario
Wed 1/7
7:00 am-10:22 am
Nonstop2h 22m
Denver Intl
Fri 1/9
10:29 pm-2:26 pm
1 stop16h 57m
OntarioDenver
ONT - DEN
ONTDEN
Ontario
Mon 1/5
6:00 pm-11:28 pm
1 stop4h 28m
Denver Intl
Sat 1/10
9:45 pm-11:14 pm
Nonstop2h 29m
OntarioDenver
ONT - DEN
ONTDEN
Ontario
Tue 1/6
5:55 am-11:35 am
1 stop4h 40m
Denver Intl
Tue 1/6
12:35 pm-4:55 pm
1 stop5h 20m
OntarioDenver
ONT - DEN
ONTDEN
Ontario
Tue 1/13
4:03 pm-11:35 pm
1 stop6h 32m
Denver Intl
Thu 1/22
11:49 am-5:03 pm
1 stop6h 14m
OntarioColorado Springs
ONT - COS
ONTCOS
Ontario
Wed 1/21
5:10 pm-10:23 pm
1 stop4h 13m
Colorado Springs
Wed 1/28
12:00 pm-4:15 pm
1 stop5h 15m
OntarioDenver
ONT - DEN
ONTDEN
Ontario
Tue 1/6
6:00 am-11:54 am
1 stop4h 54m
Denver Intl
Tue 1/6
6:23 pm-10:38 pm
1 stop5h 15m
OntarioDenver
ONT - DEN
ONTDEN
Ontario
Sat 1/10
5:30 am-1:00 pm
2 stops6h 30m
Denver Intl
Tue 1/13
8:35 am-2:40 pm
2 stops7h 05m
OntarioDenver
ONT - DEN
ONTDEN
Ontario
Wed 1/28
11:53 am-11:35 pm
1 stop10h 42m
Denver Intl
Sat 1/31
7:00 am-5:03 pm
2 stops11h 03m
Currently, March is the cheapest month in which you can book a flight from Ontario to Colorado (average of $36). Flying from Ontario to Colorado in September is currently the most expensive (average of $75). 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.
It’s typically best to fly out from Ontario to Colorado in the afternoon. Doing so could potentially save you 21% on the flight price compared to flying in the morning, which is usually more expensive.
Travelers seeking maximum savings on their Ontario to Colorado flight should consider departing on Sunday at noon when fares are most often at their lowest. Friday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
The most flights from ONT to USCO are scheduled on a Thursday (9 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (3 on average).
Entertainment
Overall
Comfort
Boarding
Crew
Food
Reviews
Thomas,Dec 2025
SEA - DEN
Entertainment
Overall
Comfort
Boarding
Crew
Food
Reviews
Thomas,Dec 2025
SEA - DEN
Entertainment
Overall
Comfort
Boarding
Crew
Food
Reviews
Thomas,Dec 2025
SEA - DEN
Entertainment
Overall
Comfort
Boarding
Crew
Food
Reviews
Thomas,Dec 2025
SEA - DEN
Entertainment
Overall
Comfort
Boarding
Crew
Food
Reviews
Thomas,Dec 2025
SEA - DEN
Entertainment
Overall
Comfort
Boarding
Crew
Food
Reviews
Thomas,Dec 2025
SEA - DEN
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$59 | Average$145 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$109 | Average$273 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$117 | Average$313 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$132 | Average$361 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$268 | Average$382 | FlexibilityNo cancel fee | On-time71% |