Frontier’s UpFront Plus guarantees an empty middle seat for extra comfort.
Frontier offers no in-flight entertainment or Wi-Fi; bring a book or pre-load devices.

Most accurate provider | CheapOair 3 stars |
|---|---|
Most trusted provider | CheapOair 3 stars |
Round-trip from | $62 (Cheapflightsfares) |
One-way from | $42 (Frontier) |
Popular in | December |
Cheapest in | January |
Average price | $272 |
Good round-trip deal | $90 or less |
Good one-way deal | $54 or less |
Fly from
Fly to
Route
Depart
Return
Price
DallasDenver
DFW - DEN
DFWDEN
Dallas/Fort Worth
Tue 3/3
11:05 am-12:19 pm
Nonstop2h 14m
Denver Intl
Tue 3/10
6:10 pm-9:14 pm
Nonstop2h 04m
DallasDenver
DFW - DEN
DFWDEN
Dallas/Fort Worth
Tue 4/28
11:00 am-12:11 pm
Nonstop2h 11m
Denver Intl
Tue 5/5
3:50 pm-6:56 pm
Nonstop2h 06m
ChicagoDenver
ORD - DEN
ORDDEN
Chicago O'Hare Intl
Wed 2/25
9:15 pm-11:06 pm
Nonstop2h 51m
Denver Intl
Tue 3/10
5:54 pm-9:29 pm
Nonstop2h 35m
HoustonDenver
HOU - DEN
HOUDEN
Houston Hobby
Tue 2/3
6:15 am-7:50 am
Nonstop2h 35m
Denver Intl
Tue 2/10
6:25 pm-9:55 pm
Nonstop2h 30m
Los AngelesDenver
LAX - DEN
LAXDEN
Los Angeles
Thu 4/23
7:59 pm-11:19 pm
Nonstop2h 20m
Denver Intl
Mon 4/27
12:48 pm-2:27 pm
Nonstop2h 39m
HoustonDenver
HOU - DEN
HOUDEN
Houston Hobby
Mon 3/2
9:05 pm-10:40 pm
Nonstop2h 35m
Denver Intl
Thu 3/5
1:25 pm-4:50 pm
Nonstop2h 25m
Los AngelesDenver
LAX - DEN
LAXDEN
Los Angeles
Mon 5/4
7:59 pm-11:19 pm
Nonstop2h 20m
Denver Intl
Wed 5/6
7:10 am-8:46 am
Nonstop2h 36m
Los AngelesDenver
LAX - DEN
LAXDEN
Los Angeles
Tue 4/7
7:55 pm-11:23 pm
Nonstop2h 28m
Denver Intl
Tue 4/14
6:50 pm-8:32 pm
Nonstop2h 42m
Los AngelesDenver
LAX - DEN
LAXDEN
Los Angeles
Tue 4/7
7:00 am-10:32 am
Nonstop2h 32m
Denver Intl
Tue 4/14
11:24 am-1:01 pm
Nonstop2h 37m
Los AngelesDenver
LAX - DEN
LAXDEN
Los Angeles
Thu 2/12
5:05 am-8:26 am
Nonstop2h 21m
Denver Intl
Tue 2/17
7:49 am-9:33 am
Nonstop2h 44m
Currently, March is the cheapest month in which you can book a flight from USA to Denver (average of $36). Flying from USA to Denver in July is currently the most expensive (average of $96). 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.
Unlike in the afternoon, when flights are generally more expensive, you can save up to 21% on flights from USA to Denver by exploring options for tickets in the evening.
Travelers seeking maximum savings on their USA to Denver flight should consider departing on Monday at noon when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
The most flights from US0 to DEN are scheduled on a Wednesday (87 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (66 on average).
About 17% of weekly flights between United States and Denver have experienced delays in the past year, with the average delay time being 143 minutes.
Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.
Wednesday tends to have the lowest number of delays on this route, whereas Thursday has historically faced a higher average of delays compared to other days of the week.
Over the last year, Air Canada have had the lowest number of delays on this route, with just 8% of flights being delayed.
Overall
Comfort
Boarding
Crew
Food
Entertainment
Reviews
Thomas,Dec 2025
SEA - DEN
Overall
Comfort
Boarding
Crew
Food
Entertainment
Reviews
Thomas,Dec 2025
SEA - DEN
Overall
Comfort
Boarding
Crew
Food
Entertainment
Reviews
Thomas,Dec 2025
SEA - DEN
Overall
Comfort
Boarding
Crew
Food
Entertainment
Reviews
Thomas,Dec 2025
SEA - DEN
Overall
Comfort
Boarding
Crew
Food
Entertainment
Reviews
Thomas,Dec 2025
SEA - DEN
Overall
Comfort
Boarding
Crew
Food
Entertainment
Reviews
Thomas,Dec 2025
SEA - DEN
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$57 | Average$196 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$88 | Average$100 | FlexibilityNo cancel fee | On-time88% | |
| Cheapest$118 | Average$318 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$127 | Average$273 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$133 | Average$338 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$137 | Average$285 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$144 | Average$307 | FlexibilityNo cancel fee | On-time83% | |
| Cheapest$148 | Average$315 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$255 | Average$331 | FlexibilityNo cancel fee | On-time75% |