Frontier's UpFront Plus guarantees an empty middle seat for added comfort.
Frontier's Zone 1 boarding available with carry-on purchase or special fare bundles.

Most accurate provider | CheapOair 3 stars |
|---|---|
Most trusted provider | CheapOair 3 stars |
Round-trip from | $69 (Cheapflightsfares) |
One-way from | $30 (CheapOair) |
Popular in | December |
Cheapest in | February |
Average price | $287 |
Good round-trip deal | $82 or less |
Good one-way deal | $51 or less |
Fly from
Fly to
Route
Depart
Return
Price
SeattleLas Vegas
SEA - LAS
SEALAS
Seattle/Tacoma Intl
mié. 1/28
6:28 pm-9:00 pm
Nonstop2h 32m
Las Vegas Harry Reid Intl
mié. 2/4
7:00 am-9:53 am
Nonstop2h 53m
San FranciscoLas Vegas
SFO - LAS
SFOLAS
San Francisco
mié. 3/25
9:35 am-3:15 pm
1 stop5h 40m
Las Vegas Harry Reid Intl
lun. 3/30
7:55 pm-9:35 pm
Nonstop1h 40m
San FranciscoLas Vegas
SFO - LAS
SFOLAS
San Francisco
mar. 3/31
1:35 pm-3:15 pm
Nonstop1h 40m
Las Vegas Harry Reid Intl
jue. 4/2
7:00 am-11:40 am
1 stop4h 40m
SeattleLas Vegas
SEA - LAS
SEALAS
Seattle/Tacoma Intl
mié. 3/18
9:31 am-12:08 pm
Nonstop2h 37m
Las Vegas Harry Reid Intl
mié. 3/25
8:00 am-10:53 am
Nonstop2h 53m
San FranciscoLas Vegas
SFO - LAS
SFOLAS
San Francisco
mar. 2/24
10:00 am-4:35 pm
2 stops6h 35m
Las Vegas Harry Reid Intl
mié. 2/25
7:40 pm-9:20 pm
Nonstop1h 40m
San FranciscoLas Vegas
SFO - LAS
SFOLAS
San Francisco
lun. 2/23
9:32 pm-11:16 pm
Nonstop1h 44m
Las Vegas Harry Reid Intl
vie. 2/27
5:58 pm-11:59 pm
1 stop6h 01m
San FranciscoLas Vegas
SFO - LAS
SFOLAS
San Francisco
mar. 3/31
9:07 pm-10:51 pm
Nonstop1h 44m
Las Vegas Harry Reid Intl
jue. 4/2
5:53 pm-10:52 pm
1 stop4h 59m
San FranciscoLas Vegas
SFO - LAS
SFOLAS
San Francisco
mar. 2/24
5:05 am-10:15 am
1 stop5h 10m
Las Vegas Harry Reid Intl
jue. 2/26
7:40 pm-10:55 pm
1 stop3h 15m
San FranciscoLas Vegas
SFO - LAS
SFOLAS
San Francisco
mar. 4/7
1:43 pm-7:14 pm
1 stop5h 31m
Las Vegas Harry Reid Intl
mar. 4/14
9:19 am-11:04 am
Nonstop1h 45m
San FranciscoLas Vegas
SFO - LAS
SFOLAS
San Francisco
mié. 2/25
8:11 am-8:14 pm
1 stop12h 03m
Las Vegas Harry Reid Intl
jue. 2/26
7:00 am-8:46 am
Nonstop1h 46m
Currently, March is the cheapest month in which you can book a flight from USA to Las Vegas (average of $36). Flying from USA to Las Vegas in December is currently the most expensive (average of $54). 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 12% on flights from USA to Las Vegas by exploring options for tickets at noon.
Travelers seeking maximum savings on their USA to Las Vegas flight should consider departing on Monday at noon when fares are most often at their lowest. Thursday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
The most flights from US0 to LAS are scheduled on a Thursday (128 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (41 on average).
About 15% of weekly flights between United States and Las Vegas have experienced delays in the past year, with the average delay time being 130 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.
Saturday 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 Cargo Carriers have had the lowest number of delays on this route, with just 10% of flights being delayed.
Crew
Comfort
Food
Overall
Boarding
Entertainment
Reviews
Thomas,Dec 2025
SEA - DEN
Crew
Comfort
Food
Overall
Boarding
Entertainment
Reviews
Thomas,Dec 2025
SEA - DEN
Crew
Comfort
Food
Overall
Boarding
Entertainment
Reviews
Thomas,Dec 2025
SEA - DEN
Crew
Comfort
Food
Overall
Boarding
Entertainment
Reviews
Thomas,Dec 2025
SEA - DEN
Crew
Comfort
Food
Overall
Boarding
Entertainment
Reviews
Thomas,Dec 2025
SEA - DEN
Crew
Comfort
Food
Overall
Boarding
Entertainment
Reviews
Thomas,Dec 2025
SEA - DEN
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$39 | Average$190 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$41 | Average$214 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$65 | Average$241 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$68 | Average$321 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$82 | Average$151 | FlexibilityNo cancel fee | On-time88% | |
| Cheapest$85 | Average$331 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$85 | Average$331 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$92 | Average$333 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$97 | Average$391 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$97 | Average$369 | FlexibilityNo cancel fee | On-time71% |