Flights to Las Vegas from Denver: The Complete Decision Page
This page answers the whole question, not just the fare: which airport to leave from, which airlines actually fly nonstop right now, what the trip really costs, when to fly for the lowest price, and whether you should be driving instead. It works in both directions, since the flight home to Denver is the same decision in reverse.
The verdict in one paragraph
This is one of the best flight markets in the country: three airlines, roughly 20 nonstops a day, about 2 hours in the air, and real price competition. Fly, and spend your energy on which airline and which day rather than whether to go. The 750 mile drive is 11-plus hours and belongs to a Utah parks road trip, not a Vegas weekend.
Your airports and the airlines that fly nonstop
| Airport | Nonstop airlines to LAS (Oct 2026) | Flight time | Notes |
|---|---|---|---|
| Denver (DEN) | Frontier, Southwest, United | About 1h55 to 2h05 | About 20 to 21 nonstops a day. Denver is Frontier's home hub, and Southwest and United match it flight for flight, which keeps all three honest on price. |
Spirit flew this route until it ceased operations on May 2, 2026. The market absorbed it without blinking because the three remaining carriers were already flying it at scale.
Check live fares for this route
Fares move daily. Check the live prices for your dates, then book the room before event-weekend room rates follow the fares up.
What fares actually look like
Kayak's route analysis for November departures (checked October 2026) puts typical Denver to Las Vegas roundtrips between $143 and $302, with the lowest recent roundtrip spotted at $156 on Frontier. January is the cheapest month (about $165 median roundtrip); October is the most expensive (about $265 median), then April (about $241). Booking at least three weeks ahead saved roughly 42 percent versus last-minute prices.
The cheapest days to fly
Monday is the standout: about 27 percent below the route average in Kayak's data, the biggest weekday discount of any route in this series. Friday runs about 16 percent above average. A Monday-out, Wednesday-or-Thursday-back Denver trip is one of the best-value Vegas getaways in the West; a Friday-out, Sunday-back trip on an event weekend is the calendar's problem, not the airline's.
Fly or drive: the honest math
Denver to the Strip is about 750 miles via I-70 and I-15, roughly 11 to 11.5 hours of driving in good weather, and I-70 through the Rockies adds winter risk that a fare sale never has. Fuel on the research basis is about $90 one way. Door to door by air is about 4 to 4.5 hours. The drive makes sense exactly once: as a deliberate road trip through Utah's national parks on the way. As transport to a Vegas weekend, it spends two of your days. Fly.
The arrival playbook
Land at Harry Reid International (LAS) and you are ten minutes from the Strip, but the details decide whether arrival feels easy or expensive. Start with the Harry Reid airport guide for terminals, rideshare pickup locations and the rental car center shuttle. Then the getting around Las Vegas guide for the monorail, Deuce bus, rideshare surge patterns and when a rental car actually pays. If you are still choosing where to sleep, the Las Vegas hotels hub compares the Strip, downtown and off-Strip honestly, and the packing list keeps you out of the airport shops.
Flying home: Las Vegas to Denver
Everything above runs in reverse, with two Vegas twists. Sunday is the most expensive and most crowded departure day of the week at LAS, and in summer the last flights of the day carry the highest heat-delay risk; the first departure of the morning is the safest seat in July and August. Arrive at the airport earlier than feels necessary on event weekends, when security lines stretch with 50,000 other people leaving the same convention.
Route facts and fare ranges checked October 25, 2026, against airline route listings and Kayak route data. Airlines change schedules seasonally; confirm nonstop service for your exact dates before you commit.
Frequently asked questions
Which airline is cheapest from Denver to Las Vegas?
Frontier most often posts the lowest headline fare (it is their home hub), but after bags and seats the three carriers land close together. Our $39 Fare Trap page shows how to compare them honestly. The cheapest recent roundtrip we found was $156 on Frontier.
How many flights a day fly from Denver to Las Vegas?
About 20 to 21 nonstops a day combined across Frontier, Southwest and United, spread from early morning to late evening.
What is the cheapest month to fly from Denver to Las Vegas?
January, at about a $165 median roundtrip in Kayak's route data. October is the most expensive month, which surprises people until they see the fall event calendar.