RareNonstop · 5h
CHI to SJUPuerto Rico
San Juan
$162
usually $340
−52%
Most monthly lows $287–$340. Cheaper than every other month on record (3).
Flights · CHI → LAS
Chicago to Las Vegas
Best fare, round trip
$116
−45%
below its usual $210
you keep $94
RareFound
- Depart
- Sun 15 Nov
- Return
- Thu 19 Nov
- Stay
- 4 nights
- Flight
- Nonstop · 4h
- Airline
Allegiant Air
Most of this route’s monthly lows fall between $179 and $212. The drop beats 93% of measured fares on the board, over 4 observed months.
Cached fare — the booking search re-prices live before you pay.
United StatesLas VegasAbsurd by design — and the closest airport to Zion, Death Valley and the Grand Canyon’s west rim.Best windowMar–May · Oct–NovAirportsHarry Reid (LAS)Every route into Las VegasFare seasonality
When this route gets cheap.
Fares bottom out in November around $116 and peak in April near $318, 174% dearer, across the 4 months we track. The cheapest itinerary we are tracking flies Allegiant Air nonstop and takes about 4 hours outbound, on a 4-night trip. At $116 for 2,448 km each way, that works out to about $24 per 1,000 km flown. That is well under the $41 per 1,000 km that short-haul fares on this board typically run. Across the 3 departure cities we track at a similar distance from Las Vegas, this fare ranks 2nd — 22% above the $95 from Houston. The best time to be in Las Vegas: Mar–May · Oct–Nov.
Day-level prices for the next 4 months
Press a day to compare its fares
The median cached fare across this calendar is 8% higher than when tracking began on 8 Aug — $224 then versus $242 now, across 21 recorded snapshots. This is a calendar-level trend, so an individual deal above can be lower. The lowest single day we have seen here is $116, on 15 Nov.
Cached day-level data for this route is sparse — 18 of 107 days priced, from 105 tracked fares. The days below are shown as found, with no cheapest-day or below-median call.
October 2026
November 2026
1Monday 2 November: $217. Compare fares from this day.3Wednesday 4 November: $144. Compare fares from this day.56Saturday 7 November: $255. Compare fares from this day.89101112Friday 13 November: $311. Compare fares from this day.Saturday 14 November: $239. Compare fares from this day.Sunday 15 November: $116. Compare fares from this day.161718Thursday 19 November: $239. Compare fares from this day.Friday 20 November: $249. Compare fares from this day.Saturday 21 November: $246. Compare fares from this day.2223242526Friday 27 November: $177. Compare fares from this day.282930
December 2026
January 2027
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Cached fares · checked 17 Oct 2026
Cheapest in Nov, around $116
45% below the $210 typical fare
$212Oct, around the usual price. Compare October fares.$116Nov, the cheapest month. Compare November fares.$179Dec, below the usual price. Compare December fares.$318Apr ’27, above the usual price. Compare April fares.
CheapestBelow usualUsualAbove usualPress a month to compare its fares
Cheapest round-trip fare found each month, Chicago to Las Vegas, from cached prices.
Route facts
- Airports
- O’Hare (ORD) · Midway (MDW) ↔ Harry Reid (LAS)
- Flight time
- ≈4 hours outbound
- Distance
- ≈2,448 km each way
- Typical price
- $210 round-trip (seasonal median)
- Airlines on the board
- Allegiant Air
- Itineraries
- Nonstop available
- Best months to visit
- Mar–May · Oct–Nov
Good to know
CHI → LAS, answered.
Is $116 a good price for Chicago to Las Vegas?
Yes — the seasonal median for this route is around $210 round-trip. At $116 you're 45% below that, which we rate rare for this route.
What is the cheapest month to fly from Chicago to Las Vegas?
Across 4 months of cached-fare history, Nov comes out cheapest on this route. The best months to actually be in Las Vegas are Mar–May · Oct–Nov — when those overlap, that's your window.
How far in advance should I book CHI → Las Vegas?
We do not publish a number for this, because we cannot measure it yet. Answering it honestly means watching the same departure date on this route over many weeks as it approaches, and that archive is still filling up — so any "book N days ahead" figure here would be borrowed from somewhere else rather than measured. What we can measure is which month is cheap: across 4 months of cached fares, Nov comes out lowest on this route. Our guide Why flight prices change covers what does move a fare.
Are there nonstop flights from Chicago to Las Vegas?
Yes — the current board includes nonstop fares (Allegiant Air). The outbound leg runs around 4 hours.
Are these prices guaranteed?
No — these are cached fares found on real searches (this one on 17 October). Airlines reprice constantly, so the booking search re-checks the live price before you pay. Fresher finds are far more likely to still be available.
Next step
Sleeping in Las Vegas?
Lock the flight first — then compare stays for 15–19 Nov · 4 nights.
Browse hotelsMissed it?
Cached fares expire. This route has a feed of its own — follow it and the next CHI → LAS drop reaches you as soon as we find it.
Follow this route’s feedKeep browsing
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